Wireless system for automatic ordering of maintenance parts for equipment

Description of equivalent WO 2007035790 A2

WIRELESS SYSTEM FOR AUTOMATIC ORDERING OF

MAINTENANCE PARTS FOR EQUIPMENT

BACKGROUND OF THE INVENTION

0004[001] Monitoring and managing equipment in remote locations presents a challenging task, particularly for construction equipment companies. This task becomes even more challenging when it involves mobile equipment such as heavy construction machinery. Creating maintenance schedules and the mechanisms by which the scheduling can be carried out can be complicated and time consuming. [002] Presently, systems are known which generate a single maintenance schedule for a piece of equipment. For instance, in the case of a piece of construction equipment, a single maintenance schedule is created for the entire machine. In cases where machines are located remote from the maintenance service center, generating maintenance schedules which are easily distributed and followed proved difficult until now.

0005[003] Maintenance work can also involve the replacement of parts. However, until now, wireless systems which enable the automatic ordering of spare parts prior to a scheduled or unscheduled maintenance service for mobile equipment situated in the field did not exist.

BRIEF DESCRIPTION OF THE DRAWINGS

0007[004] FIG. 1 illustrates a block diagram of an equipment management system.

0008[005] Figure 2 illustrates a maintenance schedule as it pertains to a piece of monitored equipment, in this case, the engine of a Year 2000 Model 370 Peterbilt truck.

0009[006] Figure 3 is a block diagram illustrating how each sensor and/or controller on a piece of equipment is used to monitor or control a piece of equipment or system or function on a piece of equipment.

0010[007] Applicable reference numbers have been carried forward.

DETAILED DESCRIPTION

0012[008] A wireless equipment management system 2 is provided for managing a plurality of equipment 4, e.g., mobile or non-mobile machines. [009] FIG. 1 illustrates a block diagram of equipment management system 2.

0013Figure 1 shows a plurality of monitored equipment 4 coupled to data processing center 6 through wireless communications link 8 represented by lines. Data processing center 6 is connected to system controller 22 which provides a communication hub among equipment 4, data processing center 6 and user control/monitoring sites (not shown). Equipment 4 can represent heavy equipment, office equipment, surface, land and air vehicles, etc. This includes engines, automobiles, trucks, construction, agricultural or earfhmoving equipment, computers, consumer electronics, copiers, printers, facsimile machines, et cetera (communications link 8 can include a satellite data link, an analog cellular telephone communications link (using, for instance, frequency division multiple access (FDMA), a digital cellular communications link (using e.g., code division multiple access (CDMA), time division multiple access (TDMA), etc.) a radio link, Bluetooth, Wi-fi(802.11a, 802.11b, 802.11g etc.) , or a combination thereof. Data processing center 6 receives status information related to monitored equipment 4. hi one aspect, each monitored piece of equipment 4 can include one or more sensors 12 for measuring equipment usage or operating characteristics, hi one embodiment, data processing center 6 receives signals, via communications link 8 from one or more sensors 12, containing data relating to equipment usage and/or operating characteristics. The received data is stored in memory at data processing center 6 which can adaptively manage maintenance scheduling for each piece of monitored equipment 4 based on data from sensors 12. For example, one of equipment 4 shown could represent an engine wherein a sensor 12 measures operating hours. Another sensor 12 can measure, for instance, ambient operating temperatures. An oil change schedule and an oil type can be calculated at data processing center 6 based upon the data supplied by sensors 12. For instance under predominantly and relatively high ambient temperatures, a higher weight oil and more frequent oil change scheduling at shorter operating hour intervals between scheduled oil changes may be prescribed to reduce engine wear. Predominantly cooler ambient temperatures over longer hour readings may dictate a lighter weight oil with more hours between oil changes. Consequently, an engine or piece of heavy equipment operating in area near the Sahara Desert in Africa could have an entirely different maintenance schedule from the same engine operating in Iceland as determined by processing center 6. Alternatively, in the case of a copier or facsimile machine sensor 12 can measure toner levels and copier usage hours to adaptively determine toner cartridge replacement scheduling and/or ordering.

0014[0010] Data processing center 6 includes one or more processors or one or more servers or computers including one or more processors which operate to run computer programs that manage and/or prepare equipment maintenance schedules for a plurality of equipment 4. Equipment operating data, historical usage data, maintenance schedules and equipment location information can also be tracked and maintained by one or more servers at data processing center 6.

0015[0011] Equipment manager 14 within data processing center 6 can be implemented as a server programmed to calculate servicing schedules for each monitored piece of equipment 4. Data on each monitored piece of equipment can be maintained in memory storage represented by functional block 6 as accomplished, for instance, in the same server as that for equipment manager 14 or in a separate server for storage of collected data. This data includes equipment specifications, and operating data including historical usage data. For instance, information relating to repair histories, in-service hours, fuel consumption, location information and operating costs can be stored in memory storage 16.

0016[0012] A particular advantage of wireless equipment management system 2 lies in its ability to generate multiple maintenance schedules that are independently, adaptively, and automatically driven from equipment information collected by sensors 12. Multiple schedules per equipment piece allow for easier tracking, initiation of new maintenance procedures and analysis. In the case of an engine, multiple schedules can be generated for oil changes, valve adjustment, component part replacement, etc. For the case of a construction machine, one or more sensors 12 can, for instance, monitor braking systems. One maintenance schedule can pertain to brake inspection and replacement of brake pads. Another schedule may pertain to track inspection and/or replacement, etc. It may be inconvenient or infeasible for an equipment manager or owner to handle certain maintenance procedures in-house. Typically, maintenance work for equipment in the field is outsourced to various specialty outfits. A tire contractor may handle all of the outsourced tire work for a company in a particular region or part of the world. Track maintenance may be contracted to a dealer . A single maintenance schedule for a piece of equipment can simply be insufficient, particularly in instances where maintenance work is contracted out or rather, outsourced. In order to assign and monitor the contracted work, a maintenance schedule for a particular type of maintenance work on a specific vehicle should be forwarded to a specific contractor, e.g. engine maintenance schedules for twenty machines identified as operating in Central America. Further, with an ever increasing eye toward security, an owner or manager of equipment may not want the entire maintenance schedule of a piece of equipment readily available to all that perform maintenance work. This may be especially the case with maintenance of security or military vehicles.

0017[0013] Figure 2 illustrates a maintenance schedule as it pertains to a piece of monitored equipment, in this case, the engine of a Year 2000 Model 950G Caterpillar® Wheel Loader. Data can be displayed in a message, an electronic report etc. for dispatch to an entity monitoring equipment or directly to personnel responsible for providing maintenance service, e.g. engine servicing contractor. The data fields shown for display can be selected as required or desired. A similar schedule can be generated for other functions requiring servicing such as vehicle tire or vehicle transmission equipment. [0014] Wireless equipment system 2 is preferably a computer-based system that uses the Transmission Control Protocol/Internet Protocol (TCP/IP) networking protocol. Further this system 2 is particularly suitable for the Internet, particularly with broadband Internet. Wireless system 2 is accessible from multiple sources concerning maintenance scheduling. Different levels of security can be meted out to each system user depending on information needs et cetera.

0018[0015] Wireless equipment system 2 can be implemented using a combination of wireless technology, data handling functionality construction industry constructs as provided, for example, by an equipment management solution such as GlobalTRACS® by QUALCOMM®. An equipment management solution automatically collects, organizes and transmits vital information concerning how the equipment is being used, how much equipment is being used as well as the location of that equipment. This information is especially useful to entities renting, distributing, contracting or owning equipment-particularly construction equipment. The equipment management solution can track equipment use such as engine hour use as reported by a sensor tracking usage hours of a system on a piece of equipment, such as an engine. Further, the equipment management solution can provide global positioning system (GPS)-based equipment location information including data indicating when a piece of equipment has moved outside of a pre-set boundary. [0016] Figure 3 is a block diagram illustrating how each sensor 12 and/or controller 20 on a piece of equipment is used to monitor or control a piece of equipment or system or function on a piece of equipment. Each sensor 12 and controller 20 on a piece of equipment 4 is connected through a controller area network (CAN). Ih one embodiment, each sensor 12 and controller 20 on the same piece of equipment can act as a CAN slave device connected to a CAN master controller 5. Master controller 5 includes antenna 18 which is used in connection with transmitting and receiving Code Division Multiple Access (CDMA) signals. However, other communications systems for use in connection with antenna 18 are contemplated, e.g., Time Division Multiple Access, et cetera.

0019[0017] Data received by each sensor 12 on a piece of equipment 4 is sent to CAN master controller 5 where it is stored until downloaded by system controller 22 through communications link 8.

0020[0018] Operator controller 24 receives alerts in the form of warning messages, instructions, alarms, etc. to warn an equipment operator (not shown) of conditions (faulty operation, etc.) sensed on equipment 4 by a sensor 12, thereby allowing the operator to take or institute corrective or preventative action.

0021[0019] Equipment manager 14 in conjunction with data processing center 6 analyzes data received from each CAN master controller 5. As a result thereof, equipment manager 14 issues, maintenance recommendations, alerts, alarms to system controller 22 which in turn forwards the same to a user control/monitoring site 26. A control/monitoring site 26 can represent, for instance, the owner of rental equipment. Through link 36, communications can be had between each control/monitoring site 26 and equipment manager 14 through system controller 22 pertaining to a specified piece of equipment 4. Communications over link 36 can occur by numerous ways. For instance, these communications can occur over the Internet, via e-mail, text messages, etc. Equipment manager 14 function can adapt to inputs, requests, etc. from control/monitoring sites 26. For instance, a maintenance step can be moved up ahead of schedule at the request of a control/monitoring site 26.

0022[0020] Ih another aspect, computers as represented by data processing center 6, are programmed according to software which, when wirelessly supplied with operating hours information, determines parts requirements in connection with Original Equipment Manufacturer (OEM) maintenance scheduling for a particular piece of equipment. Further, this software determines OEM parts ordering requirements necessary to fulfill completion of scheduled maintenance and/or emergency servicing using historical data. Inventory control, pursuant to parts ordering, can be accomplished in a number of ways using production control methodologies which coordinate parts ordering for more than one piece of equipment. Additionally, parts are ordered automatically from OEMs for components specific to a given piece of equipment according to programming of computers at processing center 6. Preferably, this automatic parts ordering occurs through use of the Internet.

0023[0021] Automatic parts ordering can be accomplished using physical linking wherein maintenance scheduling for pieces of equipment is synchronized. The same routine maintenance is performed simultaneously on all equipment of a same or similar type located at the same or proximate location. Consequently, parts needed to fulfill scheduled maintenance are ordered for all equipment at a co-location requiring maintenance.

0024[0022] In another embodiment, a kanban inventory control process is used in conjunction with ordering parts pursuant to maintenance work on equipment. "Kan" means card and "ban" means signal in Japanese. In a manufacturing setting, a component lot is provided with a card that is delivered to a component manufacturing or supply point in a factory upon exhaustion of the component inventory. The card "signals" production or reordering of a component lot to be provided to the factory area in need of the component part in the manufacturing process. A new lot of components is not made or reordered until the card is received. This is a simple example of kanban. [0023] Kanban provides inventory on a just-in-time basis. It is particularly useful in instances of providing inventory of varying lot sizes and when distance introduces time lag or variability.

0025[0024] Pursuant to implementing a kanban methodology, hardware representing data processing center 6 is programmed according to kanban software that determines which parts are suitable for kanban reordering. Items of varying lot sizes are best suited for kanban reordering. Data processing center 6 also selects parts suppliers and determines parts costs. In a further aspect as a consequence of the kanban programming of data processing center 6, the mode of transportation of spare parts and the stockpoints of storage of spare parts is determined. The goal of kanban, i.e. just in time delivery, are adhered to in making the various selections concerning parts suppliers, stockpoints, mode of transportation etc. Ih addition to the above, the kanban programming allows data processing 6 to optimally determine the intitial quantities of spare parts to be ordered and maintained on-hand in inventory.

0026[0025] Since maintenance is a consequence of a nondeterministic system, e.g. spare parts needs have probabilities other than 0 or 1, there may be instances of equipment malfunctions that are unpredictable. Consequently, necessary spare parts may not be in inventory sufficient to coincide with a repair after a diagnosis of an equipment problem. Since sensors are contemplated as being placed on equipment at selected locations, it is contemplated that equipment diagnostics can be run remotely. For instances, engine diagnostic equipment at a remote location can be obtained, using wireless communications, through sensors 12. Alternatively, computers representative of data processing center 6 can be programmed according to diagnostic software. For instance, computers representative of data processing center 6 can run engine diagnostic software. Further, it is contemplated that the diagnostic programming will enable the determination of which parts of a piece of equipment need replacement. [0026] According to one embodiment, data processing center 6 will electronically order spare parts as determined in connection with equipment diagnostic programming before, after, or during equipment breakdown or malfunction. Consequently, spare parts needed for just-in-time delivery can be made to occur to coincide with the arrival of service personnel at the site of the equipment needing service and parts replacement as determined in advance through diagnostics run remotely. This embodiment can be carried out particularly with respect to a CDMA system wherein high speed data traffic is supported in connection with allocating bandwidth on supplemental channels (SCH)for high data rate. Since communication between the equipment and equipment management system 2 uses TCP/IP, data from a TCP server (not shown) and the equipment can be carried out by a CDMA network using a Data Link layer according to the radio link protocol for added reliability.

0027[0027] Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications maybe made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims.