Blood sample information automatic acquisition device based on optical fiber sensing

Technical field of an automatic collection device for blood sample information based on optical fiber sensing

[0001] The present invention relates to the field of medical equipment, and more specifically, it relates to an automatic collection device for blood sample information based on optical fiber sensing.

Background technique

[0002] Blood tests have become an effective way for people to judge whether the various indicators of their own body are abnormal, generally including blood routine, blood type, erythrocyte sedimentation rate, reticulocytes, blood biochemistry, blood immunity and serum and other routine checks, also including Special inspections such as the concentration of various drugs. After a doctor uses a blood sample tube with patient information to draw blood, he usually needs to hold the blood sample tube, align the side of the blood sample tube with the barcode on the barcode scanner, and wait for the scanner to recognize and enter the information into the computer. Since the process is slow and time-consuming and laborious, an instrument is needed to simplify the above process.

[0003] At the same time, after the information entry is completed, if the blood sample tube placement position needs to be corresponding to the entered information to facilitate the subsequent management of blood sample information and the systematic information collection and registration, it is also necessary for the operator to remember or place it in a standardized manner. In order to achieve the purpose of information and location correspondence. This approach has many drawbacks such as inaccurate corresponding information and increasing the mental burden of operators.

[0004] More importantly, in the process of storing or transporting blood sample tubes, if a sample is lost, under the prior art, it is difficult to quickly and accurately determine the specific time and specific information of the lost sample tube. Recording, especially the acquisition of lost time, is a basically impossible task. In the medical field, it is very dangerous if medical personnel cannot respond accurately and quickly to this major medical incident and take compensation measures. Therefore, a closed-loop information recording and monitoring system is urgently needed to better perform patient blood sample information. protection of.

Summary of the invention

[0005] In order to solve the above problems, the present invention provides an automatic collection device for blood sample information based on optical fiber sensing. The device includes a plurality of probes for receiving the label information of the sample tube and an optical fiber for realizing the optical waveguide. The single test tube groove has a double-layer structure, the inner tube wall of the test tube groove is made of inorganic glass, and the outer layer of the test tube groove is made of resin material. Manufactured frame structure. Four photosensitive probes are arranged around the upper end of the tube wall to form a probe group. The photosensitive probes are opposed to each other, and the lines corresponding to the photosensitive centers of the probes are perpendicular to each other. There is a test tube tray controlled by a micro stepping motor directly below the test tube slot. The bottom of the tray surface is a pressure sensitive sensor. The probe set of the single test tube slot extends to the photosensitive panel at the bottom of the sample rack through optical fiber sensing. , The photosensitive units distributed in the word "field" form a photosensitive group, and the optical fibers connected to a single probe group are respectively coupled to the custom photosensitive group. The optical fiber probe, optical fiber, photosensitive panel and related circuits constitute an information acquisition module. The information collection module is connected to the data processing module. The control module of the whole device is respectively connected with the information acquisition module and the data processing module, and a voltage stabilizing circuit is arranged on the circuit for controlling the information acquisition. Two arc-shaped handles are symmetrically distributed on the left and right sides of the blood sample rack, and a signal indicator light and a power switch are arranged on the outside of the blood sample rack.

[0006] When the above-mentioned structure is adopted, the test tube slots in the blood sample rack are arranged in a rectangular array of n×m, and the total number of test tube slots is m·n, where n is the number of rows of the test tube slots, and m is the number of columns of the test tube slots. The position of the test tube slot is counted from the position marked with a "ten" symbol on the upper left, and the position of the test tube slot is represented by coordinates (i, j), where i = 1,2,...,n; j = 1,2, ..., m. The bottom of the tray surface in a single test tube slot is equipped with a pressure sensor, and the other end of the sensor is connected to the control module, which can be used as a judgment

The basis of whether the specimen tube is inserted or not. When the blood sample tube is placed in the test tube slot, and the bottom of the sample tube just touches the test tube tray, the barcode is located above the fiber optic probe as a whole, waiting to be scanned. When the bottom of the specimen tube is in contact with the test tube tray and is squeezed, the gravity of the blood specimen tube exerts pressure on the pressure sensor to generate a pressure. The force is used as a trigger signal to cause the pressure sensor to send a signal to the data processing module, and the data processing module obtains the position information of the pressure sensor (that is, the position information of the pipe slot) and stores it by the module. During subsequent information processing Realize the correspondence between position and barcode information. At the same time, the connected control module controls the micro stepping motor to start running at a uniform speed after receiving the trigger signal. The micro stepping motor drives the test tube tray to drop at a uniform speed by controlling the telescopic rod. At the same time, the fiber end starts to collect barcode information.

[0007] Further, in order to better implement the present invention, the following configuration is particularly adopted: the information collection terminal and the control module for the movement of the blood sample tube need to be strictly corresponding. The probe acquisition rate (ie CCD acquisition frame rate) is f₀Indicates that the distance between the midpoints of adjacent code elements of the barcode is represented by d, and the speed at which the micro stepping motor drives the blood sample tube to move in the vertical direction is represented by v_sIndicates that to achieve high-precision information collection, the three must satisfy the relationship: d = v_s/f₀。

[0008] When the above-mentioned structure is adopted, the four optical fiber probes are evenly distributed on the circumference of the test tube groove, and the central angle corresponding to the arc between every two adjacent probes is 90. , And the axis of each probe is along the radius of the test tube groove section. When using the above-distributed probe to collect signals, when the effective information of the barcode is at the central angle of the package of the blood sample tube section>180. At this time, it can be ensured that at least two fiber optic probes collect the same tag information at the same time, and the collected optical signal is sensed to the photosensitive plate through the optical fiber, so as to realize the transmission of the optical signal.

[0009] Further, in order to better realize the present invention, the following arrangement structure is particularly adopted: the tube wall adopts an inner and outer double-layer structure. The outer layer of the test tube groove is a frame structure made of resin material. A through hole is drilled at the same horizontal position according to the relative distribution of the optical fiber probe as described above. The size of the hole is equivalent to the size of the optical fiber probe. Use adhesive to fix it on the corresponding Position to achieve the purpose of stabilizing the probe. The inner layer of the test tube tank is colorless and transparent inorganic glass, and a square plane design is used at the position of the optical fiber probe. This design plays a role: on the one hand, the inorganic glass isolates the probe from the external environment and prevents external impurities from contaminating the optical fiber probe; on the other hand, glass The light transmittance of the material is better, and more information can be collected by the probe, which improves the authenticity of the collected information; at the same time, the design of the square plane information collection window prevents the barcode width from deviating from the true value due to the lens effect, thereby affecting Accuracy of collected data.

[0010] Further in order to better realize the present invention, the following arrangement structure is particularly adopted: each fiber probe is connected with an appropriate length of optical fiber for optical waveguide, and four optical fibers in a single test tube slot can be used as a unit group , Wrapped with a coating layer and then transmitted in parallel, the optical fiber passes through the internal gap of the blood sample rack to reach the corresponding photosensitive module at the bottom. As we all know, the structure of the fiber waveguide is mainly due to the fact that the refractive index of the cladding is smaller than the refractive index of the core. The signal will undergo multiple total reflections at the interface of the two media and finally exit from the other end. Only a small part of the light is lost in the form of evanescent waves, and the optical fiber is short, so the transmission loss and dispersion loss can be ignored, and the guided wave conditions are met. .

[0011] Further in order to better implement the present invention, the following arrangement is particularly adopted: the photosensitive plate is manually divided into NX M rectangularly distributed photosensitive components, wherein the distribution of the photosensitive components is consistent with the number of the test tube grooves, namely M = m, N = n. At the same time, each component contains four photosensitive units, which are distributed according to the word "Tian". The total number of photosensitive units is 4MN = 4mn, which is consistent with the number of optical fiber probes. The four optical fiber ports of the single test tube groove are respectively coupled to the four photosensitive unit surfaces of the same photosensitive component, and the optical information received by the corresponding optical fiber probe is converted. Although there is a coupling error between the optical fiber and the pixel, in the above-mentioned device, the object of the optical fiber waveguide is only limited to the binary gray information of the target, and the imaging quality is not high. Therefore, the coupling of the optical fiber and the pixel brings about The error can be ignored.

[0012] When the above-mentioned structure is adopted, the binary optical signal collected by the optical fiber end in a single test tube slot is converted into signal charge after being input by the optical fiber end, and self-scanning is realized through the directional movement of the time-series pulse, which passes through the chip The analog-to-digital converter (ADC) converts the obtained image signal into a digital signal output, and then sends the digital signal to the data processing module (DSP), which can identify and store the input digital signal to obtain the corresponding Bar code number. At the same time, the data processing module matches the position information transmitted by the pressure sensor with the barcode information, so as to realize the one-to-one correspondence and recording of the position information of the blood sample and the barcode information.

[0013] Further in order to better realize the present invention, the following arrangement structure is particularly adopted: As mentioned above, four optical fiber probes are evenly distributed on the outer edge of the inner wall of the test tube groove, so that at least two probes can receive barcode information at the same time. The corresponding digital sequence is output through the data receiving terminal. The data processing module compares the two columns of input digital signals. If the two sets of digital sequences are exactly the same, the sequence will be subsequently identified, corresponded and stored; if the two sets of digital sequences are different, the device will give an error reminder (The signal indicator turns yellow and flashes) to remind medical staff to perform manual intervention. At least two sets of data are collected in order to achieve the purpose of mutual verification and make the final record result more accurate. When the above-mentioned abnormal situation occurs, the medical staff can take out the blood sample tube, clean the inner wall of the test tube slot with ear wash balls or fiber cloth, and insert the blood sample tube again after cleaning to collect and record information.

[0014] Further in order to better implement the present invention, the following structure is particularly adopted: the control module is equipped with a voltage stabilizing circuit to ensure that the control module can maintain the output voltage basically unchanged when the input voltage fluctuates, thereby ensuring The data acquisition module works normally.

[0015] Further in order to better implement the present invention, the following configuration is particularly adopted: the data processing module can send all stored specimen information and corresponding position information to the PC terminal through the signal transmission module, and The PC terminal summarizes the specimen location information and the patient information contained in the barcode.

[0016] Further in order to better implement the present invention, the following configuration is particularly adopted: when all the test tube slots in the sample rack are free from stagnation, the device enters the sample information monitoring state, and the pressure sensor can determine whether the blood sample tube is present in the test tube groove. If the blood sample tube in the monitoring state leaves the test tube slot due to external factors, the pressure sensor will transmit the signal to the data processing port and transmit corresponding information to the computer terminal. The specimen rack will enter the emergency warning state as soon as possible (signal indication The light turns red and flashes) to remind medical staff to intervene manually.

[0017] In summary, the present invention has the following beneficial effects and advantages:

[0018] In the present invention, medical personnel can randomly place a blood sample tube with a barcode into the specimen rack, and when the bottom of the specimen tube squeezes the pressure sensor, the signal sent by the component to the data processing module makes the module obtain At the same time, the micro stepping motor drives the specimen tube to drop at a constant speed through the control of the telescopic rod. The collected information is output in the form of a digital sequence after the acquisition module, and the data processing module checks, recognizes and matches the sequence. The processed information (location and barcode) is sent wirelessly to the PC for data collection. In this way, the batch information collection, registration and positioning of the blood specimens placed in the specimen rack are realized, which provides convenience for subsequent centralized management of information. The blood sample rack can be batch signed and renumbered after being sent to the laboratory. The arc-shaped handles on both sides of the specimen rack are designed to facilitate the medical staff to transfer the device. The device does not require any additional manual operations during the normal information recording process, simplifies the cumbersome process of information recording, reduces the possibility of information recording errors caused by improper operation, and records the specimen position and specimen information at the same time to facilitate medical staff Find the patient's blood sample. When all the test tube slots in the test tube specimen rack are free of stagnation, the device enters the sample information monitoring state, and can carry out early warning and information transmission under abnormal conditions. This function provides a guarantee for the safety of the samples. The device combines optical fiber bundle image transmission with a traditional photoelectric imaging device to increase The flexibility of the device is added, and the flexibility and design tolerance of the optical path arrangement are improved. At the same time, the entire device is small in size and easy to use.

Conveniently, the accuracy of information collection is high.

Description of the drawings

[0019] In order to better illustrate the technical solutions involved in the embodiments and devices of the present invention. The following will briefly explain the embodiments and the drawings needed in the technical description. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, they will not As a prerequisite for any creative work, other drawings can also be obtained based on the drawings.

[0020] FIG. 1 is a schematic diagram of the overall structure of the present invention;

[0021] FIG. 2 is a schematic diagram of the structure of the information collection terminal of the present invention (partial A enlarged view);

[0022] FIG. 3 is a schematic diagram of the structure of the sensing device in the test tube tank of the present invention (partial B enlarged view);

[0023] FIG. 4 is a schematic diagram of the structure of the bottom area of the specimen after the information collection of the present invention is completed (partial C enlarged view);

[0024] FIG. 5 is a left side view of the optical fiber sensing specimen holder of the present invention;

[0025] FIG. 6 is a top view of the optical fiber sensing specimen holder of the present invention;

[0026] FIG. 7 is a schematic diagram of the connection of the information collection module of the present invention (a partial enlarged view of D);

[0027] The symbols in the figure are:

[0028] 1-Blood sample specimen tube;

[0029] 2-Barcode;

3-Blood specimen frame; 3a-curved handle; 3b-test tube tray; 3c-test tube slot; 3d-pressure sensor; 3e-a telescopic rod; 3f-a micro stepping motor; 3g-a resin layer tube wall; 3h An inorganic glass layer tube wall; 3i a square plane window; 3j a power switch; 3k a signal indicator; 31 a coordinate symbol;

[0031] 4-Information acquisition module; 4a a fiber optic probe; 4b a fiber; 4c a photosensitive panel; 4d a photosensitive group; 4e a photosensitive unit; 4f-optical fiber-photosensitive unit coupling module;

[0032] 5-Data processing module;

[0033] 6-control module; 6a-voltage regulator circuit.

Detailed ways

[0034] In order to more clearly demonstrate the technical solutions and device advantages involved in the present invention, the technical details and specific implementations of the present invention will be described in detail below:

[0035] The present invention provides a blood sample information automatic collection device based on optical fiber sensing, the device mainly includes a blood sample frame made of engineering plastics (such as PC-ABS material), information collection module, data processing module and control Module. There are hollow designs on the left and right sides of the blood sample frame, and the four arc shapes fit the operators fingers better, so that the operator is not easy to fall when moving the device; the middle of the specimen frame contains mXn test tube slots , Each test tube groove is a double-layer structure, in which the outer wall is made of resin, and the corresponding position is opened for fixing the fiber probe, the inner wall is made of inorganic glass, and the fiber probe position is a flat square design. The bottom of the test tube groove is useful The pressure sensor used for acquisition and triggering and the test tube tray used to support and control the movement of the specimen; the information acquisition module has four optical fiber probes for information acquisition distributed around the test tube slot, and the optical fiber probe and the photosensitive plate are connected by optical fibers; The information collection module can output the collected sample information to the data processing module. At the same time, the data processing module sends the processed information to the PC terminal for information collection. The entire process is powered and controlled by the control module for the entire information collection process, and Add a voltage stabilizing circuit to the line of control information collection.

[0036] Embodiment 1:

[0037] In normal operation, press the power switch 3j under the specimen rack, and the signal indicator 3k lights up green. At this time, the internal circuit of the blood specimen rack is turned on, and the medical staff puts the blood specimen tube 1 with the barcode 2 on it. Put it into any test tube slot of the blood sample rack. Due to the support of the test tube tray 3b, the blood sample tube 1 is in a half-dropped state at this time. After that, the process is completely automatically controlled by the device without manual additional operations. Under the action of the gravity of the blood sample tube 1, the bottom of the sample tube squeezes and deforms the pressure sensor 3d on the test tube tray 3b. After the pressure sensor 3d is completely deformed, the barcode 2 with patient information remains in place as a whole. Above the optical fiber probe 4a, the entire device is in a state to be collected at this time. After the pressure sensor 3d is squeezed, it sends a signal to start collection to the control module 6 and also sends a signal to the data processing module, which acquires and stores the position information of the pressure sensor, that is, the position information of the pipe groove. The slot coordinates are remembered from the coordinate symbol 31 in the upper left corner. At the same time, the control module 6 controls the operation of the micro stepping motor 3f, and the micro stepping motor 3f operating at a constant speed drives the test tube tray 3b to drop at a uniform speed by controlling the telescopic rod 3e connected to it. The optical fiber probe 4a fixed on the outer resin layer tube wall 3g passes through the square flat window 3i of the inorganic glass layer tube wall 3h to start collecting the barcode on the blood sample tube 1 2 information, as known from the above, at least two fiber optic probes 4a can collect the barcode 2 information of the same blood sample. Therefore, the probe group of a single test tube slot 3c conducts the collected optical signal through the optical fiber 4b to the photosensitive unit 4e coupled with it for signal conversion. In the control circuit for information collection, there is a voltage stabilizing circuit 6a in the control module 6 to ensure the stability of the output voltage, thereby ensuring the smooth progress of the collection work. The digital information output by the information acquisition module 4 is passed to the data processing module 5, and the data processing module 5 can compare the incoming information collected by the multiple optical fiber probes 4a. When there is a difference in the information collected by the multiple optical fiber probes 4a At this time, the blood sample rack will give an error warning (signal indicator 3k turns yellow and flashing). At this time, the medical staff can take out the blood sample tube 1 and properly clean the inner wall of the test tube slot, and put the blood sample again in order to perform the information Collect again. Through human programming, the data processing module 5 can compare and identify the successful number string, and obtain the corresponding barcode 2 information. The data processing module 5 corresponds the recognized barcode 2 information with the stored location information, and finally sends the corresponding information to the PC terminal for data collection. After a single blood sample rack is filled, the medical staff can pass through the two blood sample racks. The arc-shaped handle 3a is transferred and refrigerated. The above steps have completed the recording week of the information of a single blood sample Expect. After all the test tube slots 3c are filled (without stagnation), the device enters the sample information monitoring state, and the pressure sensor 3d can determine whether the blood sample tube 1 is present in the test tube slot 3c. If the blood sample tube 1 in the monitoring state leaves the test tube slot due to external factors, the pressure sensor 3d transmits the signal to the port of the data processing module 5, and the module transmits corresponding information to the computer terminal. At the same time, the blood sample rack will enter an emergency warning state (the signal indicator 3k turns red and flashes) to remind medical staff to perform manual intervention in the abnormal state.

[0038] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or changes within the technical scope disclosed by the present invention. All replacements shall be covered within the protection scope of the present invention.