Liquid out-of-product alarm system and method
22 claims: 16 independent, 6 dependent
- 1製品を流体分配サイトに送達するための流体送達媒体内で前記製品の不足を点検する方法であって、前記流体送達媒体に接続された光学センサアセンブリで製品不足点検を実行することであって、前記製品不足点検は、光を前記流体送達媒体の中に向けることと、前記流体送達媒体内で検出された光に基づいて 10ミリ秒毎に 検出器出力を生成することと、前記検出器出力の製品不足閾値に対する比較に基づいて前記流体送達媒体内の製品不足状態を判定することと、前記製品不足状態が判定されたときに、製品不足タイマをスタートさせることと、前記製品不足タイマが閾値製品不足時間帯に到達 し、前記検出器出力が前記閾値製品不足時間帯の間に100ミリ秒毎に少なくとも1回前記製品不足閾値を満たす ときに、製品不足事象を判定することと、を含む、製品不足点検を実行することと、前記製品不足事象の判定時に、コントローラを使用して警告サイクルを動作させることと、製品存在点検を実行することであって、前記製品存在点検は、光を前記流体送達媒体の中に向けることと、前記流体送達媒体内で検出された光に基づいて 10ミリ秒毎に 検出器出力を生成することと、前記検出器出力の製品存在閾値に対する比較に基づいて前記流体送達媒体内の製品存在状態を判定することと、製品存在状態が判定されたときに、製品存在タイマがまだスタートされていない場合、前記製品存在タイマをスタートさせることと、前記製品存在タイマが閾値製品存在時間帯に到達し、 前記検出器出力が前記閾値製品存在時間帯の間に100ミリ秒毎に少なくとも1回前記製品存在閾値を満たす ときに、製品存在事象を判定することと、を含む、製品存在点検を実行することと、前記製品存在事象の判定時に、前記製品不足タイマを停止することと、を含み、前記閾値製品不足時間帯は、15秒~45秒であり、前記閾値製品存在時間帯は、 2秒~4秒 である、方法。
- 2前記閾値製品不足時間帯が、30秒である、請求項1に記載の方法。
- 3前記警告サイクルを動作させることが、視覚的インジケータをオンにすること、および音響警告をオンにすることのうちの少なくとも一方を含む、請求項1に記載の方法。
- 4前記警告サイクルを動作させることが、消音ボタンが押されたかどうかを点検することと、前記消音ボタンが押された場合に、前記音響警告をオフにすることと、消音した中断時間帯が経過した場合に、前記音響警告をオンにすることと、をさらに含む、請求項 3 に記載の方法。
- 5前記警告サイクルを動作させることが、警告中断時間帯が経過したかどうかを点検することと、前記警告中断時間帯が経過した場合に前記音響警告をオフにすることと、をさらに含む、請求項 3 に記載の方法。
- 6前記警告サイクルに応答して是正措置を実行することをさらに含み、前記是正措置が、前記流体分配サイトを止めること、前記製品を前記流体分配サイトに圧送するためのポンプを止めること、製品タンクに補給すること、および前記製品タンクを交換することのうちの少なくとも1つを含む、請求項1に記載の方法。
- 7前記閾値製品存在時間帯が、3秒である、請求項1に記載の方法。
- 8製品存在信号が前記コントローラによって受信されたときに、前記警告サイクルをキャンセルし、通常動作を再開することをさらに含む、請求項1に記載の方法。
- 9前記検出器出力が少なくとも所定のフィルタ時間の間に前記製品不足閾値を満たす場合に、製品不足状態が判定される、請求項1に記載の方法。
- 10製品不足警告システムであって、流体分配システムであって、製品タンクと、流体分配サイトと、前記製品タンクから前記流体分配サイトに製品を送達する流体送達媒体と、を含む、流体分配システムと、前記流体送達媒体に接続されたセンサアセンブリであって、製品の有無が判定される前記流体送達媒体の中に光を向ける放射体と、前記流体送達媒体を通って伝送された光の検出に基づいて 10ミリ秒毎に 検出器出力を生成する検出器と、前記検出器出力の製品不足閾値に対する比較に基づいて前記流体送達媒体内の製品不足状態を判定し、前記検出器出力の製品存在閾値に対する比較に基づいて前記流体送達媒体内の製品存在状態を判定するセンサコントローラと、を含む、センサアセンブリと、前記製品不足状態が前記センサコントローラによって判定されるときにスタートするように構成された製品不足タイマと、前記製品存在状態が前記センサコントローラによって判定されるときにスタートするように構成された製品存在タイマと、前記製品不足タイマが閾値製品不足時間帯に到達 し、前記検出器出力が前記閾値製品不足時間帯の間に100ミリ秒毎に少なくとも1回前記製品不足閾値を満たす ときに視覚的警告および音響警告のうちの少なくとも1つを生成し、製品不足事象が判定されていることを示すように構成されたシステムコントローラと、を備え、前記システムコントローラは、さらに、前記製品存在タイマが閾値製品存在時間帯に到達 し、前記検出器出力が前記閾値製品存在時間帯の間に100ミリ秒毎に少なくとも1回前記製品存在閾値を満たす ときに、製品存在事象を判定するように構成され、前記閾値製品不足時間帯は、15秒~45秒であり、前記閾値製品存在時間帯は、 2秒~4秒 である、製品不足警告システム。
- 11前記システムコントローラは、前記製品不足事象が判定されるときに、是正措置を始動するように構成されている、請求項 10 に記載の製品不足警告システム。
- 12前記是正措置が、前記流体分配サイトを止めること、前記製品を前記流体分配サイトに圧送するためのポンプを止めること、前記製品タンクに補給すること、および前記製品タンクを交換することのうちの少なくとも1つである、請求項 11 に記載の製品不足警告システム。
- 13前記流体分配システムが、前記製品タンクから前記流体送達媒体を通って、前記流体分配サイトに前記製品を圧送するためのポンプをさらに含む、請求項 10 に記載の製品不足警告システム。
- 14前記流体分配サイトが、洗濯機または食器洗い機である、請求項 10 に記載の製品不足警告システム。
- 15前記流体送達媒体が、透明チューブ、半透明チューブ、または編組チューブからなる群から選択される、請求項 10 に記載の製品不足警告システム。
- 16前記流体送達媒体が、ポリエチレンチューブ、エチレンビニルアセテートチューブ、およびポリテトラフルオロエチレンチューブからなる群から選択される、請求項 10 に記載の製品不足警告システム。
- 17前記製品が、透明な製品または濁った製品のうちの少なくとも1つである、請求項 10 に記載の製品不足警告システム。
- 18前記センサアセンブリが、前記放射体、前記検出器、および前記センサコントローラを収容する液密の筐体を含む、請求項 10 に記載の製品不足警告システム。
- 19前記筐体が、透明である、請求項 18 に記載の製品不足警告システム。
- 20前記センサアセンブリは、前記センサコントローラが、前記閾値製品不足時間帯の間に製品の不足を判定するときに、視覚的指示を提供するように構成された視覚的インジケータをさらに含む、請求項 10 に記載の製品不足警告システム。
- 21製品を流体分配サイトに送達するための流体送達媒体内で前記製品の不足を点検する方法であって、前記流体送達媒体に接続された光学センサアセンブリで製品不足点検を実行することであって、前記製品不足点検は、光を前記流体送達媒体の中に向けることと、前記流体送達媒体内で検出された光に基づいて 10ミリ秒毎に 検出器出力を生成することと、前記検出器出力の製品不足閾値に対する比較に基づいて前記流体送達媒体内の製品不足状態を判定することと、前記製品不足状態が判定されたときに、製品不足タイマをスタートさせることと、前記製品不足タイマが閾値製品不足時間帯に到達 し、前記検出器出力が前記閾値製品不足時間帯の間に100ミリ秒毎に少なくとも1回前記製品不足閾値を満たす ときに、製品不足事象を判定することと、を含む、製品不足点検を実行することと、前記製品不足事象の判定時に、コントローラを使用して警告サイクルを動作させることと、前記警告サイクルに応答して是正措置を実行することと、製品存在点検を実行することであって、前記製品存在点検は、光を前記流体送達媒体の中に向けることと、前記流体送達媒体内で検出された光に基づいて 10ミリ秒毎に 検出器出力を生成することと、前記検出器出力の製品存在閾値に対する比較に基づいて、前記流体送達媒体内の製品存在状態を判定することと、製品存在状態が判定されたときに、製品存在タイマがまだスタートされていない場合、前記製品存在タイマをスタートさせることと、前記製品存在タイマが閾値製品存在時間帯に到達 し、前記検出器出力が前記閾値製品存在時間帯の間に100ミリ秒毎に少なくとも1回前記製品存在閾値を満たす ときに、製品存在事象を判定することと、を含む、製品存在点検を実行することと、前記製品存在事象の判定時に、前記製品不足タイマを停止およびリセットすることと、前記製品存在事象の判定時に、前記警告サイクルをキャンセルすることと、を含み、前記閾値製品不足時間帯は、15秒~45秒であり、前記閾値製品存在時間帯は、 2秒~4秒 である、方法。
- 22前記システムコントローラは、前記製品存在タイマが製品存在事象を示す閾値製品存在時間帯に到達するときに、前記製品不足タイマをリセットするように構成される、請求項 10 に記載の製品不足警告システム。
Independent claims22
77 paragraphs, as filed
Cross-reference This application is a continuation of US Patent Application No. 15 / 202,002 filed July 5, 2016, the contents of which are incorporated herein by reference in their entirety.
The present disclosure relates to a product shortage warning system that warns of a product shortage in a fluid delivery medium.
A fluid distribution system typically delivers a large amount of fluid to one or more components within the system. In certain areas, fluid distribution systems may deliver small amounts of fluid. For example, in the medical field, fluid distribution systems may be used to deliver small amounts of fluid into a patient's vasculature. However, in certain other areas, fluid distribution systems may deliver larger amounts of fluid. For example, in a large hotel or other dry cleaner or restaurant facility, the fluid distribution system needs to deliver large amounts of frequently used detergents, rinses, bleaches or other cleaning agents.
In a fluid delivery system where a large amount of fluid is delivered, the fluid is usually supplied automatically. In such systems, the source (such as a bottle) and fluid delivery medium (such as a supply tube) are often integrated with a device to which the fluid is delivered, such as a dishwasher or washing machine. This makes it more difficult for the operator to check the amount of fluid remaining in the source, and often results in the system running out of fluid during the wash cycle. Moreover, even with product shortage warnings, the properties of many fluids, including those used in pottery cleaning, result in frequent false alarms.
Generally, the present disclosure relates to a product shortage warning system using an optical detection sensor that detects the presence or absence of a product in a fluid delivery medium. For example, in a fluid distribution system in which one or more products are delivered, such one or more sensors can be utilized to detect the presence or absence of the product in the fluid delivery medium. The system detects the presence or absence of products in the fluid distribution system and provides a product shortage warning when a product shortage event is determined. This system prevents false product shortage warnings by revealing the fluid properties of the product and functional issues associated with the fluid distribution system.
As an example, the present disclosure relates to a product shortage warning process, which performs a product shortage check by sending a signal to the controller from an optical sensor assembly connected to a fluid delivery medium for delivering the product to a fluid distribution site. Includes starting, performing a product shortage check, using the controller to run a warning cycle after receiving a product shortage signal, and taking corrective action. Performing a product shortage check directs light into the fluid delivery medium, generates a detector output based on the light detected in the fluid delivery medium, and compares the detector output to the product shortage threshold. To determine the product shortage status in the fluid delivery medium based on, start the product shortage timer when the product shortage status is determined, and when the product shortage timer reaches the threshold product shortage time zone, the product shortage Includes determining an event.
In another example, the present disclosure relates to a product shortage warning system, which comprises a fluid distribution system having a product tank, a fluid distribution site, and a fluid delivery medium for delivering the product from the product tank to the fluid distribution site. .. The product shortage warning system also includes a sensor assembly connected to a fluid delivery medium. This sensor assembly directs light into a fluid delivery medium that can determine the presence or absence of a product, a detector that produces a detector output based on the detection of light transmitted through the fluid delivery medium, and a detector. Includes a sensor controller, which determines the product shortage condition in the fluid delivery medium, based on a comparison of the detector output against the product shortage threshold. In addition, the product shortage warning system is configured to start when the product shortage status is determined by the sensor controller, and a visual warning and visual warning when the product shortage timer reaches the threshold product shortage time zone. It also includes a system controller configured to generate at least one of the acoustic warnings to indicate that a product shortage event has been determined.
In another example, the present disclosure relates to a product shortage warning process, which is a product shortage by sending a signal from an optical sensor assembly connected to a fluid delivery medium to deliver the product to a fluid distribution site to the controller. This includes initiating an inspection, performing a product shortage inspection, operating a warning cycle using the controller after receiving a product shortage signal, and taking corrective action in response to the warning cycle. Performing a product shortage check directs light into the fluid delivery medium, generates a detector output based on the light detected in the fluid delivery medium, and compares the detector output to the product shortage threshold. To determine the product shortage status in the fluid delivery medium based on, start the product shortage timer when the product shortage status is determined, and when the product shortage timer reaches the threshold product shortage time zone, the product shortage Includes determining an event.
In addition, the product shortage warning process executes an inspection for the existence of existing products, cancels the warning cycle, stops and resets the product shortage timer when determining a product existence event, and warns a cycle when determining a product existence event. Including canceling. Checking for the presence of an existing product is based on directing light into the fluid delivery medium, generating a detector output based on the light detected in the fluid delivery medium, and comparing the detector output to the product presence threshold. To determine the product presence status in the fluid delivery medium, to start the product presence timer if the product presence timer has not yet started when the product presence status is determined, and to set the product presence timer to the threshold product. Includes determining a product presence event when the time zone is reached.
Details of one or more examples are given in the accompanying drawings and in the description below. Other features, objectives, and advantages will become apparent from the description and drawings, as well as from the claims.
<figref num="1A">It is a figure which shows the example of the product shortage system using the optical sensor which detects the existence and / or the shortage of the product which can be distributed.</figref><figref num="1B">FIG. 5 illustrates another example of a product shortage system utilizing multiple respective optical sensors to detect the presence and / or shortage of different products that can be distributed.</figref><figref num="2">FIG. 3 is a block diagram showing an example of a sensor assembly that detects the presence or absence of a product in a fluid delivery medium.</figref><figref num="3A">It is a flow chart which shows the example of the product shortage warning process.</figref><figref num="3B">It is a flow chart which shows the example of the product shortage event determination process used in the product shortage warning process of FIG. 3A.</figref><figref num="3C">It is a flow chart which shows the example of the product existence event determination process used in the product shortage warning process of FIG. 3A.</figref><figref num="3D">It is a flow chart which shows the example of the product shortage warning cycle used in the product shortage warning process of FIG. 3A.</figref><figref num="4A">It is a graph which shows the example of the detector output which shows the product existence of a transparent and opaque product.</figref><figref num="4B">It is a graph which shows the example of the detector output which shows the product existence of a transparent and opaque product.</figref><figref num="5A">It is a graph which shows the example of the detector output which shows the product shortage including the product shortage event which activates the product shortage warning.</figref><figref num="5B">It is a graph which shows the example of the detector output which shows the product shortage including the product shortage event which activates the product shortage warning.</figref><figref num="5C">It is a graph which shows the example of the binary digital output based on the detector output of FIG. 5B including the product shortage event which activates a product shortage warning.</figref><figref num="6A">It is a graph which shows the example of the detector output which shows the presence | presence of a bubble in a fluid delivery medium, when there is an insufficient bubble to activate a product shortage warning.</figref><figref num="6B">It is a graph which shows the example of the detector output which shows the presence | presence of a bubble in a fluid delivery medium, when there is an insufficient bubble to activate a product shortage warning.</figref><figref num="6C">It is a graph which shows the example of the binary digital output based on the detector output of FIG. 6B when there are insufficient bubbles to activate the product shortage warning.</figref>
The following detailed description is exemplary in nature and is by no means intended to limit the scope, applicability, or configuration of the present disclosure. Conversely, the following description provides some practical examples for realizing the examples of the present disclosure. Examples of structures, materials, dimensions, and manufacturing processes are provided for selected elements, all other elements using elements known to those of skill in the art in the art of the present disclosure. It will be appreciated by those skilled in the art that many of the examples mentioned have a variety of suitable options.
FIG. 1A is a diagram illustrating an example product shortage system 100A and an optical detection sensor assembly 200 that detects the presence and / or shortage of distributed products. The product shortage system 100A includes a system controller 104, a distribution controller 107, a pump 102, and a product tank 103. Pump 102 draws the product from the tank 103 and delivers the product to the distribution site 105. Pump 102 draws the product from the product tank 103 via the input fluid delivery medium 120 and supplies the fluid to the distribution site 105 via the output fluid delivery medium 122. The product tank 103 can accommodate any one of a number of different types of products with varying degrees of transparency and / or turbidity.
The distribution controller 107 can communicate with the pump 102 via the connection 118. In some examples, the pump 102 draws the product from the tank 103 or stops pumping by the pump under the control of the distribution controller 107. In another example, the system controller 104 can communicate with the distribution controller 107 via the connection 110. In those examples, the distribution controller 107 is under the control of the system controller 104, which either draws the product directly to the pump 102 or stops pumping the product from the tank 103. In another example, the system controller 104 may communicate directly with the pump 102 via the connection 110. Depending on the application, the system controller 104 or the distribution controller 107 may communicate with the distribution site 105 via another connection (not shown).
The system controller 104 includes a processor 112, a user interface 108, a memory 114, and a warning 106. In some examples, the system 100A can include multiple system controllers 104. The signal generated by the sensor assembly 200 can be transmitted to the system controller 104 via the connection 116. Connection 116 can carry digital or analog signals. Connection 116 can include, for example, a standard I2C connection. However, any suitable connection / communication channel known in the art may be used. The system controller 104 may further include at least one external connection 124, such as the Internet, telephone, wireless, or other connection to achieve communication with the outside world.
The memory 114 stores software for operating the system controller 104, and also stores data generated or used by the processor 112. The processor 112 executes software stored in the memory 114 and manages the operation of the system controller 104. In one example, processor 112 can run a shortage timer. In another example, processor 112 can run a product presence timer. In another example, the processor 112 can operate the product shortage timer and the product existence timer at the same time. The user interface 108 can be as simple as a few light emitting diodes (LEDs) and / or user-enabled buttons, or any other suitable mechanism for interacting with a display, keyboard or keypad, mouse or user. Can be provided.
The distribution site 105 can be the final place of use of the product, or some other intermediate place. For example, if the product shortage system 100A is used in a cleaning specialty store or kitchen application, the distribution site 105 may be a washing machine or dishwasher, in which case the product may be of the distribution mechanism on the unit. Can be distributed in or directly into the cleaning environment. In that example, the distributed product can include laundry or dishwashing detergents, fabric softeners, bleaches, disinfectants, rinses and the like. In another example, if the fluid distribution system is used in a hotel, business, industry, or other application where service employees perform cleaning operations, the distribution site 105 will distribute buckets, pail, or products. It may be another container. The distribution site 105 may also be a hose, or other tube, to direct the fluid to the desired location. It should be understood that the product shortage system 100A can be used in many different applications in which the fluid is distributed and that this disclosure is not limited in this regard. Examples of applications in which the Product Deficiency System 100A can be used are laundry applications, dishwashing applications, cleaning specialty store operations, food cooking and packaging applications, industrial processes, healthcare applications, vehicle care applications, and others known in the art. Uses include.
The input fluid delivery medium 120 and the output fluid delivery medium 122 can be realized using any kind of flexible or inflexible tube, depending on the application. The tube may be transparent, translucent, braided, or any other type of tube. The tube can be made of polyethylene, ethylene vinyl acetate, polytetrafluoroethylene, or any other suitable material. For simplicity, but not by limitation, the input fluid delivery medium 120 and the output fluid delivery medium are referred to herein as "input tube 120" and "output tube 122," respectively. The input tube 120, output tube 122, and pump 102 are referred to herein as "distribution channels." The pump 102 can be any form of pumping mechanism that supplies fluid from the product tank 103 to the distribution site 105. For example, the pump 102 may be equipped with a peristaltic pump or other type of continuous pump, positive displacement pump, or other type of pump suitable for a particular application.
In the example system shown in FIG. 1A, the sensor assembly 200 is arranged to detect the presence and / or lack of product in the input tube 120. During operation, if the fluid distribution system attempts a distribution cycle from the product tank 103 where the product remains, the input tube 120 will also contain the product. In some examples, the sensor assembly 200 continuously sends signals to the system controller 104, which interprets those signals to determine the presence or absence of a product in the input tube 120. Over time, operation continues, and even more products are distributed, effectively emptying the product tank 103. Since the product can no longer be distributed, the input tube 120 is also substantially empty. If the system controller 104 determines that a product shortage event has occurred based on the signal from the sensor assembly 200, the system controller 104 can generate a product shortage warning.
For the purposes of this specification, a "product shortage event" is defined as an event in which the system controller 104 detects a lack of fluid in the input tube 120. In some embodiments, this "product shortage event" is determined for one or more predetermined product shortage thresholds, such as a threshold time zone. When the system controller 104 detects a product shortage event, the system controller 104 includes a visual and / or audible product shortage warning (such as unaccompanied text or images with sound, etc.) displayed on the user interface 108. Warning 106 can be generated. Alternatively, or in addition, the system controller 104 may initiate a product shortage message service call (via a pager, email, text message, etc.) and send it to the technical service provider over the external connection 124. Can be done.
When warning 106 is activated to indicate a product shortage event, the user (such as an employee or service technician) can manually refill the product tank 103. In this embodiment, the user can temporarily stop or terminate the operation of the system 100A before replenishing the product tank 103. In one example, the user can do this by entering a command into the distribution controller 107 to deactivate the pump 102 and / or the distribution site 105. In another example, the user could do this by entering a control command through the user interface 108 of the system controller 104, suspending the audible and / or visual warning 106 for a period of time. can. In another example, the user can do this by entering a control command through the user interface 108 of the system controller 104 to deactivate the pump 102 and / or the distribution site 105. In another example, the user can manually turn off pump 102 and / or distribution site 105. After the user refills the product tank 103, the user manually restarts the pump 102 and / or the distribution site 105 and enters control commands into the distribution controller 107 to restart the pump 102 and / or the distribution site 105. To allow the system controller 104 to send a control signal over the connection 110 to restart the pump 102 and / or the distribution site 105 by letting it or enter a control command through the user interface 108. Can be done. The system controller 104 may further reset or clear warning 106 at an appropriate time (eg, after being manually cleared by the user, after the product tank 103 has been refilled, or after system 100A has been restarted). can.
In response to a product shortage event, the system controller 104 automatically shuts down the pump 102 and / or the distribution site 105 when a product shortage event is detected, or the system controller signals the distribution controller 107. It can transmit and automatically shut down pump 102 and / or distribution site 105. In one example, the system controller 104 can send a control signal across the connection 110 to the pump 102 and / or the distribution site 105 to temporarily suspend the operation of the corresponding component without user intervention. The system controller 104 can then restart the pump 102 and / or the distribution site 105 after receiving input from the user that the product tank 103 has been replenished. In another example, the system controller can send a control signal to the distribution controller 107 to temporarily shut down the pump 102 and / or the distribution site 105 without user intervention. The system controller can then send a signal to the distribution controller 107 and restart the pump 102 and / or the distribution site 105 after receiving input from the user that the product tank 103 has been replenished. In yet another example, only the distribution controller 107 is coupled to the pump 102 and / or the distribution site 105, and the system controller 104 does not communicate with the distribution controller 107, the pump 102, or the distribution site 105. Alternatively, the system controller 104 or distribution controller 107 can initiate an automatic replenishment cycle after the product shortage warning has been cleared and the system has been restarted.
The sensor assembly 200 or system controller 104 can also generate a visual indicator of the presence of fluid in the input tube 120. A monochromatic light, such as green, can be used to indicate that the product in the product tank 103 is left, while another color light, red or flashing, can be used to empty the product tank 103. Can show that it needs to be replenished.
FIG. 1B is a diagram showing another example product shortage system 100B. Product shortage system 100B distributes multiple products. To that end, the product shortage system 100B comprises multiple product channels (A-N), where each channel is associated product tank 103A-103N, pump 102A-102N, system controller 104, and distribution site 105A-. Has 105N. Pumps 102A-102N are included within the pump assembly 101. Pumps 102A-102N draw fluid from their respective product tanks 103A-103N through input tubes 120A-120N and supply fluid through output tubes 122A-122N to one of the distribution sites 105A-105N. Each product tank 103A-103N can accommodate any of a number of different types of products with varying transparency and / or turbidity. Optical detection sensor assemblies 200A-200N detect the presence and / or deficiency of distributed products within each distribution channel.
The example product shortage system 100B shown in Figure 1B shows each distribution channel to have its own dedicated product tank 103, input tube 120, output tube 122, pump 102, destination site 105, and sensor assembly 200. However, it should be understood that it is not always necessary to have a one-to-one correspondence for each distribution channel. For example, the sensor assemblies 200A-200N may be mounted within a single unit via which the input tube for each distribution channel is routed. Alternatively, various combinations of one channel per sensor or two or more channels per sensor may be used, and the present disclosure is not limited in this regard.
Similarly, the pump assembly 101 in the example of FIG. 1B can include multiple pumps 102A-102N, i.e. one for each distribution product. However, it should be understood that it is not always necessary to have a one-to-one correspondence between pumps 102A-102N and the distribution channel. For example, some distribution products may share one or more pumps, which are switched from one distribution product to another under the control of the system controller 104. The pump or pumps 102A-102N provide fluid from one of the product tanks 103A-103B to the appropriate distribution site 105.
Also, any sensor assembly 200A-200N may be arranged to detect the presence and / or shortage of products in the output tubes 122A-122N instead of the input tubes 120A-120N, as shown in FIG. 1B. It should be understood that the location of the sensor assembly 200A-200N can be a convenience issue rather than a system performance issue.
In some examples, the system controller 104 can be coupled to the distribution controller 107 or pump assembly 101 via a connection 110. Through the connection 110, the system controller 104 can communicate with the pump assembly 101 and / or the distribution controller 107 to substantially control the operation of each individual pump 102 (eg, see FIG. 1A, supra). You can temporarily stop or start the operation as you did). Depending on the application, the system controller 104 can also communicate with one or more distribution sites 105A-105N. In another example, only the distribution controller 107 is coupled to the pump assembly 101, which controls the functions of pumps 102A-102N and / or distribution sites 105A-105N.
Each sensor assembly 200A-200N detects the presence and / or lack of fluid in the corresponding input tube 120A-120N. The system controller 104 is coupled to each sensor 206A-200N via the corresponding connections 116A-116N. The system controller 104 can monitor the signals received from each sensor assembly 200A-200N and respond to any detected product shortage event as described above. For example, the system controller 104 may generate a visual or audible warning 106 and display a message on the user interface 108 if the system controller detects one or more product shortage events. The visual or audible warning 106 and / or the message displayed on the user interface 108 and / or the message sent via the pager, email or text message, etc. shall be of the product tanks 103A-103N. It will indicate which is empty and thus inform the user which product tank needs to be refilled. In some examples, the system controller 104 can also automatically temporarily stop and then restart the pumps 102A-102N corresponding to the empty product tanks 103A-103N, and / or as described above. As such, an automatic replenishment cycle for empty product tanks can be initiated. In another example, as described above with respect to FIG. 1A, pumps 102A-102N and / or distribution sites 105A-105N automatically with or without communication from system controllers 104 and / or distribution controllers 107. Can be stopped and restarted manually or manually.
In FIG. 1B, each sensor assembly is shown with a dedicated connection to the system controller 104, but the sensor assemblies 200A-200N are connected to communicate with the system controller 104 in several different ways. Please understand that it can be done. For example, the sensors 200A-200N may be connected to the system controller 104 in a daisy chain connection. In this example, the system controller 104 is directly coupled to the first sensor assembly 200A via the connection 116A, and each subsequent sensor assembly 200B-200N is coupled to the next sensor assembly or the like. Communication protocols that identify each sensor assembly 200A-200N and communicate separately can also be used. However, the present disclosure is not limited to the particular architecture in which the sensor assemblies 200A-200N connect and communicate with the system controller 104, and that the system can be configured in many different ways known to those of skill in the art. I want to be understood.
FIG. 2 is a block diagram illustrating an exemplary embodiment of a sensor assembly 200 that detects the presence and / or deficiency of products that can be distributed. The sensor assembly 200 includes a sensor 206, a housing 210, a sensor controller 258, a memory 254, and an output interface 260. The sensor 206 includes a tube connector 220, an optical radiator 250, and an optical detector 252. In one example, the sensor 206 can be an OPTEK OPB350 optical sensor. The sensor assembly 200 may also include an indicator 256, if desired. The sensor assembly 200 communicates with an external device such as the system controller 104 or other sensors via the output interface 260.
The housing 210 houses all the components of the sensor assembly 200. In one example, the housing 210 can be sealed from the external environment. The housing 210 protects the components of the sensor assembly 200 from components of the external environment where the sensor can malfunction due to causes such as dust or liquid. In another example, the housing 210 can be liquidtightly sealed. In another example, the housing 210 may be transparent so that the internal components of the sensor assembly 200, in particular the indicator 256, are visible to the user.
Memory 254 stores software and data used or generated by sensor controller 258. As described in more detail below, the memory can store the reference line detection values generated by the detector 252 and processed by the sensor controller 258. During operation of the sensor assembly 200, the sensor controller 258 can control the indicator 256 based on the information received from the optical detector 252. For example, upon detecting a product shortage, the sensor controller 258 can allow the indicator 256 to generate a visual or audible warning. For the purposes of this disclosure, "product shortage condition" is defined as a determination by sensor assembly 200 that sensor 206 has detected a product shortage in tube 120 based on at least one detection value generated by detector 252. Has been done. A "product presence state" is defined as a determination by the sensor assembly 200 that the sensor 206 has detected the presence of a product in the tube 120 based on at least one detection value generated by the detector 252.
In one example, the sensor controller 258 can send a binary signal to the system controller 104 via the connector 260 based on whether the sensor 206 has detected a product presence or product shortage condition. In another example, the sensor controller 258 can send the raw output from the detector 252 to the system controller 104, and the system controller can process the raw output. In another example, the sensor controller 258 determines if the product shortage event was caused by the presence of a product shortage condition during a given time period, and the sensor controller 258 is external to the system controller 104 or the like via the connector 260. A product shortage message can be sent to the device.
The optical radiator 250 includes at least one optical radiator that emits radiation having a specific wavelength range. The radiator 250 is capable of emitting light in a narrow band wavelength or a relatively wider wavelength range. The radiator 250 can also emit light whose wavelength changes over a period of time. In one example, radiator 250 is capable of emitting light within the visible spectrum. Light in the visible spectrum includes wavelengths in the range of 380 nm to 720 nm. An example of such a radiator is a light emitting diode (LED). In another example, several individual LEDs placed in close proximity are also available. The light emitted by the radiator 250 propagates through the tube running through the tube connector 220 of the sensor 206 and can be detected by one or more optical detectors 252. The amount of radiation detected by the detector 252 depends on the contents of the tube running through the tube connector 220 and also on the type of tube. If the tube contains a liquid product, the detector 252 will detect a certain level of radiation emitted by the radiator 250. However, if the tube is substantially empty, the detector 252 can detect different amounts of radiation emitted from the radiator 250.
The optical detector 252 includes at least one optical detector that detects radiation within the relevant wavelength range within the visible light spectrum. The detector 252 can be implemented with multiple detectors, i.e. one for each wavelength range, or with one or more detectors programmable to detect multiple wavelength ranges. Can be realized. Therefore, the terms "detector" and "detectors" are used interchangeably herein.
The detector 252 detects the radiation emitted by the radiator 250 and propagated through the tube running through the sensor 206 (via the tube connector 220). For example, the detector 252 may include a photodetector that detects visible light within a single wavelength or within a wavelength range. However, the detector 252 may include multiple detectors for detecting light in multiple wavelengths or wavelength ranges, with the wavelength range selected for both the radiator 250 and the detector 252 being the sensor 206. It should be understood that it may depend on the transparency and / or turbidity of the product that can be detected by.
The sensor controller 258 controls the operation of the radiator 250 and receives a signal regarding the amount of light detected from the detector 252. The sensor controller 258 executes the radiator program 262 to control the radiator 250 and executes the detection program 263 to process the signal received from the detector 252. In one example, the signal received from the detector 252 can be output as a voltage. In another example, the signal received from detector 252 can be output as a percentage of current, or optical transmission. If the detection program 263 detects a product shortage condition, the indicator 256 can be activated. In one embodiment, the detection program 263 can also activate the indicator 256 if it confirms the presence of fluid in the tube.
In one example, the sensor controller 258 initiates the radiator program 262 and the detection program 263 to produce reference line detection data if the product is present and / or is missing. When an external controller, such as the system controller 104, is notified of a product presence or product shortage in the tube 120, the system controller 104 sends a reference line command to the sensor assembly 200 (via connector 260). , Generate such reference line data. Thus, the system controller 104 can be informed, for example, via manual input from the user. When the sensor controller 258 processes the reference line command, it executes the radiator program 262 to emit light and also executes the detection program 263 to acquire the reference line data from the detector 252. Upon receiving the reference line detection data from the detector 252, the controller 258 can store the reference line data in the memory 254. If a plurality of detectors are used in the detector 252, the signal for each detector can be stored in the memory 254. Such reference line data can then be used for normalization purposes when attempting to determine the lack and / or presence of fluid in the tube.
Using the procedure described above, the sensor 206 can be calibrated prior to use to define the reference line product presence and reference line product availability. In one example, the sensor 206 can be calibrated with an empty tube condition that just defines the reference line empty condition. This allows the sensor 206 to be used with a variety of different products without the need to recalibrate the sensor 206 when switching from one product to another. In another example, the sensor 206 can be calibrated with an empty tube that defines the reference line empty state, and also defines the reference line product presence state, is filled with product, and is completely free of air bubbles. The condition of the tube can also be calibrated. In another example, the sensor 206 can be automatically calibrated when first used. Based on the reference line empty state and / or the reference line product presence state, the user can select the threshold product shortage state. This product shortage threshold is preset and stored in memory 254. In some examples, the product shortage threshold can be empirically determined based on experimental test data or expert knowledge pre-stored in memory 254. In another example, the product shortage threshold can be calculated automatically based on the output of the sensor 206 when it is first turned on with an empty tube.
The optical detector 252 detects the amount of emission emitted by the radiator 250 propagated through the tube and the contents of the tube. The controller 258 compares the amount of light received by the detector 252 with the reference line data. The amount of change from reference line data that meets the threshold can be caused, for example, by the air present in the tube when the product tank 103 is substantially empty and the product is unavailable. Therefore, any amount of change that meets the threshold may indicate a product shortage. However, not all changes from the reference line are due to product shortages. For example, ambient lighting conditions, product and tube variability, emission bubbles, slight leaks in tubing, and variability between production batches of a single product can all cause product shortages that are directly linked to malfunctions. Can contribute to or create significant variability from the baseline. Some embodiments include additional features that avoid such examples.
Further, in some embodiments, the sensor controller 258 can change the magnification of the detection signal so that the variation between the sensors can be removed. In many cases, the complete output produced by one sensor unit is compared to the complete output produced by the second sensor unit, even when testing the same substance under the same conditions. , May change. Therefore, as used herein, the term "detector output" should be construed to include both the raw detection signal and the magnification-altered detector output.
The sensor controller 258 processes the detector output received from the detector 252. Detection program 263 compares the detector output to at least one product shortage threshold to determine product presence or product shortage in tube 120. In some embodiments, the sensor controller 258 obtains a more accurate determination of product existence or product shortage by clarifying the reasons for possible malfunctions and no abnormalities in malfunctions. For example, exhaust bubbles from the priming pump 102, or slight leaks in the tube 120, can erroneously indicate a product shortage condition. The sensor controller 258 can determine the reason for this situation by determining whether the output from the detector 252 meets the product shortage threshold for at least a predetermined filter time.
In some examples, the filter time can be between 50 and 150 ms. In another example, the filter time can be 100 milliseconds. When the sensor controller 258 determines that the product shortage threshold is satisfied within a predetermined filter time, the sensor controller 258 determines that the product shortage state is satisfied. If the bubbles are present for only a few milliseconds, the product shortage threshold will not be met during the predetermined filter time and the sensor controller 258 will determine that the product is present. Similarly, the sensor controller 258 can reveal the reason for the situation when the product covers the inner surface of the tube 120 or is covered with a thin film, which incorrectly indicates the product presence. The sensor assembly 200 will recognize the coating or thin film formation as large bubbles and will correctly determine the product shortage condition.
In some examples, the sensor controller 258 sends a signal through the output interface 260 to the system controller 104, which indicates a product shortage state and a product presence state. The system controller 104 processes these signals to determine if a product shortage event has occurred that requires the activation of the product shortage warning. In another example, the sensor controller 258 itself determines if a product shortage event has occurred and sends a product shortage event signal to the system controller 104 indicating that a product shortage warning should be triggered. As will be described in more detail in FIGS. 3A to 3D below, the product shortage event is determined when the product shortage state exists during a predetermined product shortage threshold time zone.
FIG. 3A is a flow chart (300) showing an example of a product shortage warning process. This step (300) is initiated by initiating a product shortage check (302), which involves sending a signal from the sensor assembly 200 to the system controller 104. In one example, to perform a product shortage event check (304), the sensor assembly 200 scans the fluid delivery medium 120 and sends a signal to the system controller 104 indicating a product presence or product shortage condition. The system controller 104 processes the signal from the sensor assembly 200 to determine if a product shortage event has occurred. In another example, the sensor assembly 200 determines if a product shortage event has occurred and sends a product shortage event signal to the system controller 104. This procedure is described in more detail in connection with FIG. 3B below.
If no product shortage event is detected (304), step (300) is redone by starting another product shortage check (302). If a product shortage event is detected, corrective action is initiated and / or the product shortage warning cycle is activated (306). This warning cycle can include visual warnings on the sensor assembly 200 and / or system controller 104, as well as acoustic warnings generated by the system controller 104. In one example, this visual warning may be a flashing red LED on the sensor assembly 200 and / or a flashing red LED on the system controller 104. The warning cycle is described in more detail in relation to Figure 3D below.
In some cases, invoking corrective action (306) only involves running a warning cycle. In these examples, visual and / or audible warnings warn the user to take corrective action, and the equipment at pump 102, and distribution site 105 continues to operate without the product. In another example, initiating corrective action (306), apart from or in addition to continuing to run the warning cycle, signals pump 102 and / or distribution site 105 from system controller 104 or distribution controller 107. Can be started to stop pump 102 and / or distribution site 105, including sending. In another example, apart from or in addition to continuing to run the warning cycle, initiating a corrective action (306) requires signaling the user over the external connection 124 and taking corrective action. It can include notifying the user that there is.
Corrective action is taken in response to the warning cycle and / or the initiation of corrective action (306). In some examples, the user can manually shut down the pump 102 and / or the distribution site 105, and replace or refill the product tank 103. In another example, the equipment at the pump 102 and / or the distribution site 105 could be stopped automatically in response to a signal from the system controller 104, and the user would then replace the product tank 103. Or it can be replenished. In another example, the product tank 103 can be automatically replaced or refilled.
In one example, at the same time as or after initiating a corrective action (306), the system controller 104 sends a signal to the sensor assembly 200 to initiate an inspection of the presence of existing products (308). In another example, the sensor assembly 200 itself initiates an inspection of the presence of an existing product (308). The check for the presence of the existing product (312) determines if corrective action is taken and, as a result, the product is re-existing within the fluid delivery medium 120.
In one example, to perform a product presence event check (312), the sensor assembly 200 scans the fluid delivery medium 120 and sends a signal to the system controller 104 indicating a product presence or product shortage condition. The system controller 104 processes the signal from the sensor assembly 200 to determine if a product presence event has occurred. In another example, the sensor assembly 200 determines if a product presence event has occurred and sends a product presence event signal to the system controller 104. This procedure is described in more detail in connection with Figure 3C below. If no product presence event is detected, the check for the presence of the existing product is restarted (308). If a product presence event is detected, the warning cycle is canceled and normal operation resumes (314).
In some examples, canceling the warning cycle (314) sends a signal using the system controller 104 to turn off the visual warning on the sensor assembly 200 and / or the system controller 104, as well as. / Or includes turning off audible warnings on the system controller 104. In another example, canceling the warning cycle (314) manually turns off the visual warning on the sensor assembly 200 and / or the system controller 104, and / or the audible warning on the system controller 104. Includes turning it off manually. In some examples, resuming normal operation (314) involves sending a signal to pump 102 and / or distribution site 105 and turning on equipment at pump 102 and / or distribution site 105. .. In another example, resuming normal operation (314) involves manually turning on the equipment at pump 102 and / or distribution site 105. In another example, if the equipment at pump 102 and / or distribution site 105 cannot be stopped in response to a product shortage warning, once the product tank 103 is refilled or replaced, normal operation resumes. To. Once normal operation is resumed (314), step (300) is restarted by initiating a product shortage check (302).
FIG. 3B is a flow chart showing an example of the product shortage event determination step (304) used in the product shortage warning step (300) of FIG. 3A. This product shortage event determination step (304) is a step in which the sensor assembly 200 and / or the system controller 104 detects a product shortage in the fluid delivery medium 120 during the product shortage threshold time zone. The radiator 250 directs the light into the fluid delivery medium 120, where the presence of the product can be determined (320). As mentioned above, the radiator 250 can include, for example, an LED that emits light in the visible wavelength range.
The detector 252 produces a detector output based on the detection of light transmitted through the fluid delivery medium 120 (322). For example, the detector 252 can include a detector that produces a detector output corresponding to the light emitted within the wavelength range transmitted through the fluid delivery medium 120. The detector 252 can also include an additional detector that produces a detector output based on the amount of light received within the additional wavelength range. In one example, the signal received from the detector 252 can be output as a voltage. In another example, the signal received from detector 252 can be output as a percentage of current, or optical transmission.
Sensor controller 258 runs detection program 263 to compare the detector output with at least one corresponding product shortage threshold to determine product shortage in the fluid delivery medium (324). In one example, air bubbles need to be present in the fluid delivery medium 120 to meet the product shortage threshold. In another example, air bubbles must be present in the fluid delivery medium 120 for the duration of the predetermined filter time (described above with respect to FIG. 2) to meet the product shortage threshold. If the detector output meets its corresponding product shortage threshold (326), the product shortage timer is started. In one example, the system controller 104 receives a signal from the sensor controller 258 indicating that a product shortage condition is present in the fluid delivery medium 120, and the system controller 104 initiates a product shortage timer. In another example, the sensor controller 258 starts the product shortage timer after determining that a product shortage condition exists.
In one example, once the product shortage timer is started, the system controller 104 simultaneously checks for product presence events (as described in Figure 3C below) to see if the product shortage threshold time zone has been met. Inspection to. In another example, the sensor assembly 200 performs inspections at the same time. In determining if the product shortage threshold time zone has been met, the sensor assembly 200 continuously directs light towards the fluid delivery medium 120 (320), produces a detector output (322), and outputs that detector output. Compare with the corresponding product shortage threshold (326). In one example, the detector 252 of the sensor 206 produces a detector output every 10 milliseconds.
A product shortage event is determined if the detector output continuously meets its corresponding product shortage threshold during the threshold product shortage time zone (332). In one example, the system controller 104 determines a product shortage event and sends a signal to initiate corrective action (306). In another example, the external connector 260 of the sensor assembly 200 sends a product shortage signal to the system controller 104, triggers a warning cycle, and initiates corrective action (306). In one example, the threshold product shortage time zone is 30 seconds. In another example, the threshold product shortage time zone may be 15 seconds to 45 seconds. In another example, the threshold product shortage time zone may be 25 seconds to 35 seconds. In another example, the user may set the threshold product shortage time zone by entering control commands through the user interface 108 of the system controller 104. In one example, the detector output must meet the product shortage threshold at least once every 100 milliseconds or every 10 scans from the sensor 206 so that the product shortage threshold is met "continuously". .. In another example, if a product presence event occurs after the product shortage timer is started (336), the timer is stopped and reset (338), and the sensor assembly 200 is subsequently loaded with the out-of-stock fluid delivery medium. Scan 120.
A typical shortage warning system activates a shortage warning when it detects a single bubble in a fluid delivery medium. The product shortage determination step (304) of the present disclosure is advantageous because it prevents erroneous product shortage warnings. As mentioned above, the system controller 104 or sensor assembly 200 can be programmed with the appropriate threshold product shortage time zone. The threshold product shortage time zone is based on the characteristics of the fluid delivered through the fluid delivery medium 120. Some fluids produce bubbles as they travel through the fluid delivery medium, but if the bubbles are not continuous, they do not indicate a product shortage within the fluid delivery medium. The product shortage event determination step (304) of the present disclosure has clarified the reason for such a fluid, which requires the sensor assembly 200 to detect a product shortage during the threshold product shortage time zone. By doing so, it is possible to prevent the system controller 104 from invoking an erroneous warning and stopping the pump 102 and / or the distribution site 105. Further, the product shortage event determination step (304) enables early detection of the product shortage event by requesting the product existence event generated to stop the product shortage timer.
FIG. 3C is a flow chart showing an example of the product existence event determination process (312) used in the product shortage warning process (300) of FIG. 3A. The product presence event determination step (312) is a step in which the sensor assembly 200 and / or the system controller 104 detects the presence of the product in the fluid delivery medium 120. The product existence determination step (312) is substantially the same as the product shortage event determination step (304) in FIG. 3B. The radiator 250 directs the light into the fluid delivery medium 120, where the presence of the product can be determined (340).
The detector 252 produces a detector output based on the detection of light transmitted through the fluid delivery medium 120 (342). The sensor controller 258 runs the detection program 263 to compare the detector output with at least one corresponding product presence threshold to determine the presence of the product in the fluid delivery medium (344). In one example, the fluid delivery medium cannot contain air bubbles larger than 1 inch to meet the product presence threshold. In another example, in order to meet the product presence threshold, the bubbles cannot be present in the fluid delivery medium for longer than the predetermined filter time (described above with respect to FIG. 2).
If the detector output meets its corresponding product presence threshold (346), the product presence timer is started. In one example, the system controller 104 receives a signal from the sensor controller 258 indicating that the product presence state is present in the fluid delivery medium 120, and the system controller 104 initiates the product presence timer. In another example, the sensor controller 258 starts the product presence timer after determining that the product presence state exists. Once the product presence timer has started, the sensor assembly 200 continuously directs light into the fluid delivery medium 120 (340), produces a detector output (342), and has a corresponding product presence at that detector output. Compare with threshold (346). In one example, the detector 252 of the sensor 206 produces a detector output every 10 milliseconds.
A product presence event is determined if the detector output continuously meets its corresponding product presence threshold during the threshold product presence time zone (352). In one example, the system controller 104 determines a product presence event, signals it to trigger cancellation of the warning cycle, and resumes normal operation (314). In another example, the external connector 260 of the sensor assembly 200 sends a signal to the system controller 104 to trigger the cancellation of the warning cycle and resume normal operation (314). In one example, the threshold product presence time zone is 3 seconds. In another example, the threshold product presence time zone may be 10 milliseconds to 5 seconds. In another example, the threshold product presence time zone may be 2 to 4 seconds. In another example, the user may set the threshold product presence time zone by entering control commands via the user interface 108 of the system controller 104. In one example, the detector output must meet the product presence threshold at least once every 100 milliseconds or every 10 scans from the sensor 206 so that the product presence threshold is met "continuously". .. If the detector output does not meet the product presence threshold, or if the product presence threshold time zone is not met, the timer is reset and the sensor assembly 200 continuously scans the fluid delivery medium 120 to check the product presence status. ..
The product presence determination step (312) of the present disclosure is advantageous because it enables early detection of erroneous product shortage events. When bubbles are present more frequently than the product presence threshold time zone, the product shortage event can be determined by setting the product presence threshold time zone. For example, if the product presence threshold time zone is 3 seconds and bubbles are present every 2 seconds, the product shortage event can still be determined even if the bubbles are not continuously present. This is advantageous because it can prevent the distribution system from operating in less than the desired quantity of product.
FIG. 3D is a flow chart showing an example of the product shortage warning cycle (306) used in the product shortage warning step (300) of FIG. 3A. Once the product shortage condition is determined in the product shortage warning process (300) (304), visual and / or acoustic warnings can be turned on (360). In one example, the visual warning may be a red LED on the system controller 104 and / or the sensor 206, and the acoustic warning may be generated by the system controller 104. In some examples, the mute button is available on the system controller 104 and the user can press the mute button to turn off the acoustic warning once activated.
Once the warning is turned on, if a mute button is available on the system controller 104, the system controller 104 checks to see if the mute button was pressed (362). If the system controller 104 determines that the mute button has been pressed, the system controller 104 turns off the acoustic warning and the LED warning on the system controller 104 and / or the sensor assembly 200 keeps blinking (364). In some examples, the system controller 104 can be programmed to turn on and wake up acoustic warnings after a mute interruption period. In those examples, the system controller 104 checks to see if the muffling interruption period has elapsed (368). In some examples, the muffling interruption time is between 15 minutes and 2 hours. In another example, the muffling interruption time is 45 minutes to 1.5 hours. In another example, the muffling interruption time is one hour. After the mute interruption period elapses, the system controller 104 turns on and wakes up the acoustic warning, and the LED warning on the system controller 104 and / or the sensor assembly 200 keeps blinking (360). In another example, the user can set the mute interruption time zone by entering control commands through the user interface 108 of the system controller 104. If the mute interruption time has not passed, the system controller 104 turns off the acoustic warning if it is not already turned off, and the LED warning on the system controller 104 and / or the sensor assembly 200 keeps blinking ( 364). In another example, both acoustic and visual warnings can be turned off when the mute button is pressed.
In some examples, the system controller 104 can be programmed to turn off acoustic warnings after a warning interruption time zone. In those examples, the system controller 104 checks to see if the warning interruption time period has elapsed (366). In some examples, the warning interruption time zone is 15 minutes to 2 hours. In another example, the warning interruption time zone is 45 minutes to 1.5 hours. In another example, the warning interruption time zone is one hour. In another example, the user can set the warning interruption time zone by entering a control command through the user interface 108 of the system controller 104. When the warning interruption time period elapses, the system controller 104 turns off the acoustic warning and the LED warning on the system controller 104 and / or the sensor assembly 200 keeps blinking (370). If the warning interruption time has not passed, the system controller 104 will turn on the acoustic warning if it is not already on, and the LED warning on the system controller 104 and / or the sensor assembly 200 will continue to flash (364). ). In another example, both acoustic and visual warnings can be turned off after the warning interruption period has elapsed.
Figures 4A-4B are graphs showing examples of detector outputs showing the presence of transparent and opaque products. As mentioned above, the sensor 206 can be calibrated prior to use to define the reference line product presence state and the reference line product empty state. Sensor 206 can be calibrated with an empty tube condition that defines the reference line empty condition, and is a tube condition that is filled with the product and has no air bubbles to define the reference line product presence condition. Can be calibrated with. Based on the reference line empty state and the reference line product presence state, the user can select the threshold product shortage state.
FIGS. 4A-4B show the output signal of the sensor 206 in voltage vs. time. FIG. 4A includes a transparent product threshold 402 and an output voltage 404. The output voltage 404 indicates the reference line empty tube state and the reference line product existence state. As mentioned above, the transparent product threshold 402 can be selected by the user and stored in memory 254 of the sensor assembly 200. If the output voltage 404 is above the transparent product threshold 402 with the transparent product threshold 402 defined, the sensor assembly 200 determines that the product is in the fluid delivery medium 120. Similarly, if the output voltage 404 is below the transparent product threshold 402, the sensor assembly 200 determines that the product is not in the fluid delivery medium 120 and / or that the fluid delivery medium 120 is an empty tube.
FIG. 4B includes an opaque product threshold 412 and an output voltage 414. The output voltage 414 indicates the reference line empty tube state and the reference line product existence state. As mentioned above, the transparent product threshold 412 can be selected by the user and stored in memory 254 of the sensor assembly 200. If the output voltage 414 is below the opaque product threshold 412 with the opaque product threshold defined, the sensor assembly 200 determines that the product is in the fluid delivery medium 120. Similarly, if the output voltage 414 is above the opaque product threshold 412, the sensor assembly 200 determines that the product is not in the fluid delivery medium 120 and / or that the fluid delivery medium 120 is an empty tube.
FIGS. 5A-5B are graphs showing an example of a detector output indicating a product shortage, including a product shortage event that triggers a product shortage warning. 5A-5B show the output signal of the sensor 206 in voltage vs. time. FIGS. 5A-5B include a product shortage threshold 502 and an output voltage 504. In FIGS. 5A-5B, the output voltage 504 indicates the reference line product presence state and the detector output satisfying the product shortage threshold 502. As mentioned above, the product shortage threshold 502 can be selected by the user and stored in memory 254 of the sensor assembly 200.
As shown in FIGS. 5A-5B, when the output voltage 504 is above the product shortage threshold 502, the sensor assembly 200 determines that the fluid delivery medium 120 is in the product presence state. Similarly, if the output voltage 504 is below the product shortage threshold 502, the sensor assembly 200 determines that the fluid delivery medium 120 is in a product shortage state. As described above with reference to FIGS. 3A-3D, if the detector output meets the product shortage threshold, the product shortage timer is started by either the system controller 104 or the sensor controller 258. As shown in FIG. 5B, if the output voltage 404 is continuously below the product shortage threshold 502 during the threshold product shortage time zone, a product shortage event has occurred and a product shortage warning is triggered. This is, for example, such that a mixture of liquid and air is drawn from the product tank into the fluid delivery medium and substantially only air is drawn into the fluid delivery medium until the liquid level in the product tank is low enough. It can be caused by a shortage of semi-product. In FIG. 5B, the threshold product shortage time zone is 30 seconds. As mentioned above, the threshold product shortage time zone can be selected, for example, based on the fluid properties of the product.
FIG. 5C is a graph showing an example of a binary digital output 506 based on the detector output of FIG. 5B. In some examples, the system controller 104 receives the detector signal from the sensor assembly 200 as a binary output, or receives the detector signal and converts it to a binary output, where voltage 5 is the product. The presence state is indicated, and zero voltage indicates the product shortage state. If the product shortage state exists during the threshold product shortage time zone, the system controller 104 determines that a product shortage event has occurred and activates the product shortage warning. In another example, the sensor controller 258 can convert the detector signal to a binary output and, upon determining a product shortage event, sends the signal to the system controller 104 to trigger a product shortage warning.
6A-6B are graphs showing an example of the detector output showing the presence of air bubbles in the fluid delivery medium when there are insufficient air bubbles to trigger the product shortage warning. 6A-6B show the output signal of the sensor 206 in voltage vs. time. Figures 6A-6B include the product shortage threshold 602 and the output voltage 604. In FIGS. 6A-6B, the output voltage 604 indicates the reference line product presence status as well as the detector output satisfying the product shortage threshold 602. As mentioned above, the product shortage threshold 602 can be selected by the user and stored in memory 254 of the sensor assembly 200. As shown in FIGS. 6A-6B, when the output voltage 604 is above the product shortage threshold 602, the sensor assembly 200 determines that the fluid delivery medium 120 is in the product presence state. Similarly, if the output voltage 604 is below the product shortage threshold 602, the sensor assembly 200 determines that the fluid delivery medium 120 is in a product shortage state.
As mentioned above with reference to FIGS. 3A-3D, if the detector output meets the product shortage threshold, the timer is started by either the system controller 104 or the sensor controller 258. In some examples, as shown in Figure 6A, a single bubble is not enough to activate the timer. In these examples, the sensor assembly 200 can determine that a single bubble does not meet the threshold filter time, which indicates a product shortage condition sufficient to trigger the timer. As mentioned above, a single bubble can be created, for example, by exhaust gas bubbles from the product or by a slight leak in the fluid delivery medium. However, once the timer is activated, the detector output is continuously below the product shortage threshold 602 during the threshold product shortage time zone in order for the system controller 104 or sensor controller 258 to determine the product shortage event. Must exist. As shown in Figure 6B, if the system controller 104 or sensor controller 258 detects product presence during the threshold product presence time zone while the product shortage timer is running, the product shortage timer shall be reset. become. This can occur, for example, if the product tank is low at the product level but not in a product shortage or in a semi-product shortage. In the example shown in FIG. 6B, if the product presence is detected for at least 3 seconds after the product shortage timer is started, the product shortage timer is reset. As mentioned above, the threshold product presence time zone can be selected, for example, based on the fluid properties of the product.
FIG. 6C is a graph showing an example of a binary digital output based on the detector output of FIG. 6B. In some examples, the system controller 104 receives the detector signal as a binary output from the sensor assembly 200, or converts the signal from that sensor assembly 200 to a binary output, where voltage 5 is the product. An existing state is indicated, and a voltage zero indicates a product shortage state. If there is a product shortage condition, the product shortage timer is started. However, if the product exists during the threshold product existence time zone while the product shortage timer is in progress, the product shortage timer will be reset. In another example, the sensor controller 258 converts the detector signal to a binary output and, if a product shortage status is determined, starts a product shortage timer to detect the product presence status during the threshold product presence time zone. If so, the product shortage timer can be reset.
FIG. 6C also shows what happens when the sensor assembly 200 filters for small bubbles, such as the small bubbles shown in FIG. 6A. The sensor assembly 200 can determine that a single bubble does not meet the threshold filter time that indicates a product shortage condition, and as a result, the binary output shown in Figure 6C reflects the product presence condition. Become. If a single bubble meets a threshold filter time that indicates a product shortage condition, the binary output shown in FIG. 6C will reflect the product shortage condition.
Note that the graphs are shown in FIGS. 4A-4B, 5A-5C, and 6A-6C for illustrative purposes only. When detecting different fluids, various other forms of detector output (with different graph profiles) can be created, and the detector output depends on the turbidity and / or transparency of the fluid. Will.
15 sheets
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Every citation, both ways
| Document | Relation | Office |
|---|---|---|
| JP2010096587A | Cites | Japan |
| JP2011220858A | Cites | Japan |
| WO2009047721A2 | Cites | World Intellectual Property Organization (WIPO) |
| JP2012035149A | Cites | Japan |
| JP2012063329A | Cites | Japan |
| JP2005208957A | Cites | Japan |
| JP2000042288A | Cites | Japan |
18 members in 9 offices
Priority claims9
| Document | Office | Kind | Date |
|---|---|---|---|
| 15202002 | United States of America | – | |
| 201615202002 | United States of America | A | |
| 201615202002 | United States of America | A | |
| 2017039497 | United States of America | W | |
| 2017039497 | United States of America | W | |
| 15202002 | – | – | – |
| US201615202002 | – | – | – |
| US2017039497 | – | – | – |
| WO2017US39497 | – | – | – |
Members18
| Document | Office | Kind | |
|---|---|---|---|
| CA3029982A1 | Canada | A1 | |
| US2018010950A1 | United States of America | A1 | |
| WO2018009376A1 | World Intellectual Property Organization (WIPO) | A1 | |
| US10072962B2 | United States of America | B2 | |
| AU2017291699A1 | Australia | A1 | |
| CN109415868A | China | A | |
| BR112019000114A2 | Brazil | A2 | |
| MX2019000218A | Mexico | A | |
| EP3481990A1 | European Patent Office (EPO) | A1 | |
| JP2019527411A | Japan | A | |
| CN109415868B | China | B | |
| JP7007352B2This record | Japan | B2 | |
| AU2017291699B2 | Australia | B2 | |
| CA3029982C | Canada | C | |
| AU2017291699C1 | Australia | C1 | |
| BR112019000114B1 | Brazil | B1 | |
| EP3481990B1 | European Patent Office (EPO) | B1 | |
| EP3481990C0 | European Patent Office (EPO) | C0 |
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Numbers
- Publication
- 7007352
- Publication, DOCDB
- 7007352
- Publication, EPODOC
- JP7007352B
- Application
- 2019500246
- Application, DOCDB
- 2019500246
- Application, EPODOC
- JP20190500246
Titles2
- Japanese
- 液状製品不足警告システムおよび方法
- English
- Liquid product shortage warning system and method
Classification
- CPC, 9
- D06F33/47
- A47L15/0055
- D06F39/022
- A47L2401/023
- A47L2501/26
- D06F2105/60
- D06F34/14
- G01F23/292
- G08B21/182
- IPC, 3
- G08B21 24
- D06F33 47
- D06F34 14
