JP6506158B2 - Parts management system - Google Patents

Description

  The present invention relates to a component management system, for example, to a component management system that manages components by a component management tag on which an RFID chip is mounted.

  2. Description of the Related Art In recent years, a component management system using a RFID (Radio Frequency Identifier) tag instead of a barcode printed on a slip has been in widespread use. For example, a technical standard of tag information in parts management using an RFID tag has recently been formulated as an EPC (Electronic Product Code), ISO 15961 or the like.

  Patent Document 1 discloses an example of an article management system using such an RFID tag. In a system using an RFID tag described in Patent Document 1, an RFID tag that controls or monitors a peripheral device such as a sensor or an LED with a control circuit such as a microcomputer is disclosed.

JP, 2013-152176, A

  Here, the RFID tag will be described. In the RFID tag, identification information (ID information) for identifying the tag is stored in a first storage area (for example, an EPC area), and other user data is stored in a second storage area (for example, a user area). Ru. Therefore, generally, status information indicating the status of the peripheral device is stored in the user area.

  Further, FIG. 10 shows a sequence diagram for explaining the procedure for accessing the user area defined by the communication specification of the RFID tag such as EPC standard (for example, EPC gen 2) and ISO 18000-6c. As shown in FIG. 10, in the communication procedure conforming to EPC gen2 and ISO18000-6c, etc., in order to read out data in the user area of the RFID tag, a read command for accessing the user area in the RFID tag from the RFID reader Before sending the ID, it is required to send an inventory command to the RFID tag to acquire ID information from the EPC area.

  From the above, when storing status information indicating information of a peripheral device monitored by a control circuit or the like in the user area, the inventors have to transmit a plurality of commands to obtain the status information. The problem is that the processing speed of the system is slow.

  The present invention has been made in view of the above circumstances, and an object thereof is to improve the processing speed of a parts management system having a function of acquiring status information of peripheral devices stored in an RFID tag.

  One aspect of a parts management system according to the present invention is a parts management tag having a first storage area accessed in response to an inventory command and a second storage area accessed in response to a read command, and The inventory command is transmitted to access the first storage area each time before the read command is transmitted to access the second storage area, and the first storage area is stored in the first storage area. A component management system including an RFID reader for acquiring identification information of the component management tag, wherein the component management tag is configured to use the information stored in the first storage area and the second storage area as the RFID An RFID chip that transmits in response to a request from a reader, a peripheral device, and a control circuit that controls the peripheral device, the control circuit including Storing status information indicating the state of the edge device in the first storage area.

  According to one aspect of the component management system according to the present invention, status information stored in the first storage area can be read out by an inventory command, and transmission of a read command to acquire status information is avoided. be able to.

  In another aspect of the component management system according to the present invention, data formats of the first storage area and the second storage area have specifications in accordance with an EPC (Electronic Product Code) standard and ISO15961.

  As a result, in the component management system according to the present invention, a general purpose RFID chip conforming to the technical standard can be used, and procurement of components of the component management tag becomes easy.

  According to the parts management system of the present invention, the processing speed of the system can be improved.

FIG. 1 is a schematic view of a parts management system according to a first embodiment. FIG. 6 is a diagram for explaining the appearance of a parts management tag according to the first embodiment. FIG. 2 is a block diagram of a parts management tag according to the first embodiment. FIG. 6 is a flow chart for explaining the procedure of part pickup control in the article management system according to the first embodiment. FIG. FIG. 6 is a flowchart for explaining the procedure of part storage control in the article management system according to the first embodiment. FIG. FIG. 2 is a diagram for explaining a memory configuration of an RFDI chip according to the first embodiment. FIG. 5 is a diagram for explaining a data format of an EPC area in a memory of the RFID chip according to the first embodiment. FIG. 7 is a view for explaining a specific example of the data format of the EPC area in the memory of the RFID chip according to the first embodiment. FIG. 7 is a sequence diagram for explaining the procedure of communication between the RFID reader and the component management tag when reading out status information of the peripheral device in the component management system according to the first embodiment. It is a sequence diagram explaining the procedure for accessing the user area prescribed by the communication specification of RFID tags, such as EPC standard and ISO18000-6c.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following description and drawings are omitted and simplified as appropriate for clarification of the explanation. In the drawings, the same elements are denoted by the same reference numerals, and redundant descriptions are omitted as necessary.

  First, an overview of the entire part management system to which the present invention is applied will be described. Therefore, FIG. 1 shows a schematic diagram of the parts management system 1 according to the first embodiment. The parts management system 1 performs parts management using an RFID (Radio Frequency Identifier) tag. The RFID tag reads and writes identification information (hereinafter referred to as ID information) and other information stored in a memory in the tag by a reader / writer device. Further, in the stem using the RFID tag, the reader / writer device and the RFID tag transmit and receive information by a wireless signal.

  As shown in FIG. 1, the component management system 1 includes a system control unit 10, an antenna 11, a shelf 12, a component management tag 13, and a worker terminal 18. It also includes a component box 14 used to transport the components stored in the shelf 12 and a loading box 16 used to transport the components removed from the shelf 12 to the process line. In the example shown in FIG. 1, the parts box 14 is moved by the parts box transport carriage. An RFID tag 15 is attached to the component box 14. The input box 16 is moved by the input cart. A component management tag 17 is attached to the input box 16. The parts management tag 13 and the parts management tag 17 have the same configuration, but are attached with different reference numerals in FIG. 1 because the attached places are different.

  The system control unit 10 issues a wireless signal via the antenna 11 to read out the ID information of the RFID tag in the component management tag 13 or gives various instructions to the component management tag 13. That is, the system control unit 10 functions as a reader / writer device for the component management tag 13. In addition, the system control unit 10 includes a database in which ID information of the RFID tag and component information are associated. The system control unit 10 controls the component management tags 13 and 17 with reference to this database. Details of the control will be described later. The system control unit 10 also has a function of communicating with the worker terminal 18.

  Further, as shown in FIG. 1, in the component management system 1, a component management tag 13 is provided for each area in the shelf 12 for storing components. In the example illustrated in FIG. 1, the position where the component management tag 13 is attached is attached to the upper plate portion of the area for storing the component in the shelf 12. The example shown in FIG. 1 is an example of the position where the component management tag 13 is attached, and the position where the component management tag 13 is attached can be arbitrarily changed.

  The component management tag 13 includes an RFID chip inside. The system control unit 10 functions as a reader / writer device of the component management tag 13. The system control unit 10 also transmits and receives wireless signals to and from the RFID chip via the antenna 11.

  The worker terminal 18 functions as a reader / writer device that reads and writes tag ID information from the RFID tag in the component management tag 13 and the component management tag 17 and the RFID tag 15. Further, the worker terminal 18 communicates with the system control unit 10 by a wireless signal (for example, wireless LAN, Bluetooth (registered trademark), etc.), and notifies the system control unit 10 of ID information read from the RFID tag. The worker wears the worker terminal 18, for example, on the wrist. Thereby, the reading and writing of the RFID tag can be performed by the movement of the worker's hand.

  In the parts management system 1 according to the first embodiment, the system control unit 10, the parts management tag 13, and the worker terminal 18 are used to improve the efficiency of parts management. Further, in the component management system 1, at least one of attaching the RFID tag 15 to the component box 14 and attaching the component management tag 17 to the insertion box 16 can further enhance the efficiency of component management. Details of the specific operation of the parts management system 1 will be described later.

  Subsequently, the component management tag 13 used in the component management system 1 according to the first embodiment will be described in detail. Therefore, FIG. 2 is a view for explaining the appearance of the parts management tag 13 according to the first embodiment. As shown in FIG. 2, the component management tag 13 is provided with a solar cell panel 21, a tag antenna 22, an indicator 23, and a display unit 24. Further, for example, a management mark 25 may be attached to the component management tag 13.

  The solar cell panel 21 converts light energy into electrical energy. The parts management tag 13 operates by the power generated by the solar cell panel 21. The tag antenna 22 is an antenna of an RFID tag chip in the component management tag 13. The indicator 23 is one of display devices indicating to the operator that the component should be picked up or stored. The display unit 24 is, for example, a display device that indicates the state of the component management tag 13 (for example, the state of the signal strength and the like) to the worker.

  A block diagram of this parts management tag 13 is shown in FIG. As shown in FIG. 3, the component management tag 13 includes a solar cell panel 21, a tag antenna 22, an indicator 23, a display unit 24, a capacitor 26, and a control circuit 27.

  The component management tag 13 and the solar cell panel 21 are one form of a power supply unit. As the power supply unit, a battery, a piezoelectric element, a vibration power generation element, a magnetic resonance element or the like can be used instead of the solar cell panel 21. By using these elements, the component management tag 13 can obtain power without pulling the cable from the outlet or the like. Note that a power supply unit that receives power supply from the outlet by a cable can also be used. The capacitor 26 smoothes the variation of the power generated by the solar cell panel 21. The component management tag 13 operates using the power generated by the solar cell panel 21 and the capacitor 26.

  The control circuit 27 is a so-called microcontroller that controls peripheral devices (for example, the indicator 23, the display unit 24, the solar cell panel 21, and the capacitor 26). Specifically, the control circuit 27 is, for example, an arithmetic unit capable of executing a program such as a CPU (Central Processing Unit). The control circuit 27 reads the information of the memory in the RFID chip 28 and changes the display contents of the indicator 23 and the display unit 24 based on the read information.

  The RFID chip 28 incorporates a memory, and outputs or updates information stored in the memory based on a wireless signal transmitted and received by the tag antenna 22. Further, information in the memory in the RFID chip 28 is read or updated by the control circuit 27. In the following description, the RFID chip 28 is also referred to as an RFID tag.

  The indicator 23 includes, for example, at least one LED (Light Emitting Diode). The indicator 23 transmits information to the worker according to the lighting state of the LED. The display unit 24 is, for example, a liquid crystal panel, and transmits the state of the component management tag 13 or information on components to the operator.

  Subsequently, the operation of the parts management system 1 according to the first embodiment will be described. The parts management system 1 according to the first embodiment performs part removal control when parts are removed from the shelf 12 and part storage control for storing parts in the shelf 12. Each of these two controls will be described below. First, FIG. 4 is a flow chart for explaining the procedure of the part picking control in the article management system 1 according to the first embodiment.

  As shown in FIG. 4, in component removal control, first, an indicator for the RFID tag in the component management tag 13 attached to the shelf 12 in which the system control 10 stores the component to be removed via the antenna 11 is displayed. An indicator lighting instruction for lighting 23 is transmitted as a wireless signal (step S1).

  Subsequently, the component management tag 13 on which the RFID tag that has received the indicator lighting instruction transmitted by the system control unit 10 is mounted turns on the indicator 23. Then, the component management tag 13 with the indicator 23 lit sends an operation response signal (wireless signal) notifying that the indicator 23 has been lit to the system control unit 10 (step S2). The operation in the component management tag 13 at this time will be described. In step S2, the RFID chip 28 of the component management tag 13 that has received the indicator lighting instruction from the system control unit 10 writes the received indicator lighting instruction in the memory. Then, the control circuit 27 reads the indicator lighting instruction written in the RFID chip 28 and turns on the indicator 23. In addition, the control circuit 27 writes information to notify that the indicator 23 is turned on in the memory in the RFID chip 28. Then, in response to receiving the control signal for confirming the operation state from the system control unit 10, the RFID chip 28 sends back to the system control unit 10 information indicating the lighting state of the indicator 23 stored in the memory. .

  Subsequently, the operator takes out the component from the shelf 12 provided with the component management tag 13 in which the indicator 23 is lit (step S3). In the operation of step S3, the worker terminal 18 worn by the worker communicates with the RFID chip 28 in the component management tag 13 attached to the shelf 12 from which the component has been taken out. In this communication, the worker terminal 18 reads out the ID information stored in the RFID chip 28. The worker terminal 18 notifies the system control unit 10 of the read ID information (step S4).

  Subsequently, the system control unit 10 determines the legitimacy of the ID information received from the worker terminal 18, and when it is determined that the ID information is correct, the system control unit 10 uses the part management tag 17 of the part insertion box 16 for storing the taken out part. On the other hand, an indicator lighting instruction is transmitted by a wireless signal (step S5).

  Subsequently, the component management tag 17 on which the RFID tag that has received the indicator lighting instruction transmitted by the system control unit 10 is mounted turns on the indicator 23. Then, the component management tag 17 which has caused the indicator 23 to light sends back an operation response signal (wireless signal) notifying that the indicator 23 has been turned on to the system control unit 10 (step S6). Since the operation in the component management tag 17 at this time is the same as the operation of the component management tag 13 in step S2, the description is omitted here.

  Subsequently, the operator stores the component in the input box 16 provided with the component management tag 17 in which the indicator 23 is lit (step S7). In the operation of step S7, the worker terminal 18 worn by the worker communicates with the RFID chip 28 in the component management tag 17 attached to the insertion box 16 in which the component is stored. In this communication, the worker terminal 18 reads out the ID information stored in the RFID chip 28. The worker terminal 18 notifies the system control unit 10 of the read ID information (step S8).

  Subsequently, the system control unit 10 determines the legitimacy of the ID information received from the worker terminal 18, and when it is determined that the ID information is correct, the RFID tag chip in the component management tag 13, 17 whose indicator is currently lit is In response to this, an indicator extinguishing instruction is transmitted as a wireless signal (step S9). Thereafter, the component management system 1 repeats the operations of steps S1 to S10.

  Next, FIG. 5 shows a flowchart for explaining the procedure of component storage control in the article management system 1 according to the first embodiment.

  As shown in FIG. 5, in the component storage control, first, when the operator lifts the component box 14, the ID information stored in the RFID tag 15 in which the operator terminal 18 is attached to the component box 14 Are read out, and the read out ID information is notified to the system control unit 10 (step S11).

  Subsequently, the system control unit 10 determines the legitimacy of the ID information received from the worker terminal 18, and when it is determined that the ID information is correct, the component management tag 13 attached to the shelf 12 for storing the taken out components. An indicator lighting instruction is transmitted as a wireless signal to the RFID tag of (step S12).

  Subsequently, the component management tag 13 on which the RFID tag that has received the indicator lighting instruction transmitted by the system control unit 10 is mounted turns on the indicator 23. Then, the component management tag 13 with the indicator 23 lit sends back to the system control unit 10 an operation response signal (wireless signal) notifying that the indicator 23 has been lit (step S13). The operation in the component management tag 13 at this time is the same as the operation of the component management tag 13 in step S2 of the flowchart of FIG.

  Subsequently, the component is stored in the shelf 12 provided with the component management tag 13 in which the indicator 23 is on (Step S14). In the operation of step S14, the worker terminal 18 worn by the worker communicates with the RFID chip 28 in the component management tag 17 attached to the shelf 16 in which the component is stored. In this communication, the worker terminal 18 reads out the ID information stored in the RFID chip 28. The worker terminal 18 notifies the system control unit 10 of the read ID information (step S15).

  Subsequently, the system control unit 10 determines the validity of the ID information received from the worker terminal 18, and when it is determined to be correct, notifies the worker that the work is correct, and the current indicator is lighted. An indicator extinguishing instruction is transmitted as a wireless signal to the RFID tag chip in the component management tag 13 (step S16). Here, as a method of notifying the worker that the work is correct, it is conceivable to use the vibration function of the worker terminal 18, voice and the like. Thereafter, the component management system 1 repeats the operations of steps S11 to S16.

  In the parts management system 1 according to the first embodiment, the RFID tag and the RFID tag are adjusted by adjusting the strength of the wireless signal output from the reader / writer device (for example, the system control unit 10 to which the antenna 11 is connected and the worker terminal 18). The communicable range with the reader / writer device can be adjusted. In the parts management system 1 according to the first embodiment, by setting the strength of the wireless signal emitted by the worker terminal 18 smaller than the strength of the wireless signal emitted from the antenna 11, the worker terminal 18 controls the parts management tags 13 and 17. Alternatively, the system is constructed so that the ID information can be read only when the RFID tag 15 is approached.

  In the parts management system 1 according to the first embodiment, by constructing the above-described system, the work efficiency is improved by notifying the worker of the position of the shelf where the parts are stored and taken out or the place of the input box 16. It can be done. Further, in the parts management system 1 according to the first embodiment, the worker wears the worker terminal 18 and monitors the handling of the worker's parts by the worker terminal 18 to thereby control the system control unit 10 and the part management tag. The operator can be notified of the next work operation using 13, 17. In the parts management system 1 according to the first embodiment, since the parts management tags 13 and 17 operate based on the power generated independently without receiving power supply from others, installation of the parts management tags 13 and 17 It can be easily removed and moved.

  In the component management system 1 according to the first embodiment, the control circuit 27 monitors the state of the peripheral device (for example, the indicator 23, the display unit 24), and the status shows the state of the peripheral device based on the monitoring result. The control circuit 27 stores the information in the RFID chip 28. Then, the status information is read by an RFID reader / writer (hereinafter referred to as an RFID reader). And in this invention, the storage location of the status information in the RFID chip 28 in the component management tag 13 and 17 and the read control method have one of the features. Hereinafter, a method of storing status information in the component management tags 13 and 17 and a method of controlling readout of status information in the component management system 1 will be described in more detail.

  First, a storage location of status information in the RFID chip 28 according to the first embodiment will be described. The RFID chip 28 incorporates a memory. The data format of this memory conforms to the EPC standard and technical standards such as ISO 15961. Therefore, FIG. 6 is a diagram for explaining the memory configuration of the component management tag according to the first embodiment.

  As shown in FIG. 6, the memory of the RFID chip 28 is configured by four banks of memory banks 0 to 3. The memory bank 0 is a reserved area reserved by the standard, and is defined as an area in which both read and write operations can be performed. The reservation area stores, for example, information for enhancing the security of the tag, such as a kill password and an access password.

  Memory bank 1 is an EPC area, and is defined as an area in which both read and write operations can be performed. In the EPC area, code information such as EPC data is stored. Also, the EPC area is a first storage area accessed in response to the inventory command.

  The memory bank 2 is defined as a TID area in which tag identification numbers (ID information) are stored, and is an area where only read is permitted. This ID information is written when the manufacturer ships the RFID chip 28.

  The memory bank 3 is defined as a user area where the user of the RFID chip 28 can store arbitrary information, and is an area where both read and write operations can be performed. The user area is a second storage area accessed in response to the read command.

  The RFID chip 28 according to the first embodiment writes status information of peripheral devices in the EPC area. Therefore, the data format of the EPC area will be described in more detail. FIG. 7 is a view for explaining the data format of the EPC area in the memory of the RFID chip 28 according to the first embodiment. As shown in FIG. 7, 0 to N + 1 consecutive addresses are set in the EPC area. Although the data length of the data stored in each address can be arbitrarily determined, in the following description, the data length of the data stored in each address is 16 bits.

  In the area of address 0, a cyclic redundancy check (CRC) word having a data length of 16 bits is stored. The CRC word is generated in the RFID chip 28 based on the data stored at the addresses 1 to N + 1.

  In the area of address 1, a PC word having a data length of 16 bits is stored. The values from the first word to the N-th word of the EPC data are stored in the addresses 2 to N + 1. The data length of the EPC data is 16 bits × number of words N.

  Here, the PC word will be described in detail. This PC word has a value indicating the length of EPC data, a value indicating whether data exists in user memory (hereinafter referred to as a user memory value), and a value of XPC bits indicating the presence or absence of extension in the PC word (Hereinafter, XPC bit value), a value indicating a standard attribute of EPC data (hereinafter referred to as a standard attribute value), and a value indicating an attribute of EPC data (hereinafter referred to as an AFI (Application Family ID) value) are stored. Ru.

  The value indicating the length of the EPC data has a data length of 5 bits, and indicates the data length of the ECP area following the PC word as a value in 16-bit word units. In the example shown in FIG. 7, since 01000 is stored as a value indicating the data length of the EPC data, the data length of the EPC data is 8 words (128 bits).

  The user memory value has a data length of 1 bit. The user memory value is 0 when all data in the user area defined in the memory bank 3 is 0, and is 1 when a value other than 0 exists in data in the user area. In the example shown in FIG. 7, the case where the data of the user area is all 0 is shown.

  The XPC bit value has a data length of 1 bit. The XPC bit value will be 1 if there is an extension in the PC word and 0 if there is no extension in the PC word. In the example shown in FIG. 7, the extension word is 1 because it is present.

  The standard attribute value has a data length of 1 bit. The standard attribute value is 0 when the EPC data conforms to the EPC, and 1 when it conforms to the ISO. In the example shown in FIG. 7, the data format is 1 in order to use an ISO compliant data format as the EPC data.

  The AFI value has a data length of 8 bits. The AFI value is given as 00h when using EPC-compliant values as EPC data, and using attribute data that does not belong to any group without specifying a field among ISO-compliant AFI values. Further, when using the application field specified by ISO15961 etc. among the AFI values conforming to ISO, the AFI value is given a value specified by ISO15961. In the RFID chip 28 according to the first embodiment, among the AFI values conforming to ISO, since the field is not specified and attribute data not belonging to any group is used, 00h is given as the AFI value in FIG.

  Data given to each address in accordance with the data format of the EPC area shown in FIG. 7 is read as a hexadecimal value. The read value of the PC word based on the example shown in FIG. 7 is 4300 h.

  Subsequently, a data configuration of EPC data of the RFID chip 28 according to the first embodiment will be described. Thus, FIG. 8 is a view for explaining a specific example of the data format of the EPC area in the memory of the RFID chip according to the first embodiment.

  As shown in FIG. 8, in an example of EPC data used by the RFID chip 28 according to the first embodiment, EPC data having an AFI value of 00 h and a data length of 8 words (128 bits) has a data format conforming to ISO. Define. Then, in the RFID chip 28 according to the first embodiment, the value of the application specific header is represented using the EPC data of the first word. In the first embodiment, EPC data of the second to sixth words is used to represent a 10-digit tag unique number. This tag unique number is given in ASCII format. Further, in the example shown in FIG. 8, the tag unique number is A000012345. In the first embodiment, tag information is represented using EPC data of the 7th word and the 8th word. The tag information indicates the result of self-diagnosis by the control circuit 27 and is a value defined in advance corresponding to the diagnosis result. The tag information is written by the control circuit 27 based on the diagnosis result.

  In the component management tags 13 and 17 according to the first embodiment, the control circuit 27 monitors the states of the peripheral devices such as the indicator 23 and the display unit 24. If there is a change in the state of the peripheral devices, the changed state is displayed. A value indicating the state of the peripheral device is written as status information in tag information of EPC data. Then, the EPC data of the EPC region described with reference to FIGS. 6 to 8 is transmitted to the RFID reader as a response value to the inventory command transmitted from the RFID reader. Therefore, FIG. 9 is a sequence diagram illustrating the procedure of communication between the RFID reader and the component management tag when reading out status information of the peripheral device in the component management system according to the first embodiment.

  As shown in FIG. 9, in the component management tags 13 and 17 according to the first embodiment, the control circuit 27 periodically monitors the state of peripheral devices. Then, when a change in the state of the peripheral device is detected, status information indicating the state of the peripheral device after the change is transmitted to the RFID chip 28 as tag information. Then, in response to receiving the tag information, the control circuit 27 updates the tag information in the EPC area.

  On the other hand, in the parts management system 1 according to the first embodiment, the RFID reader periodically transmits an inventory command to acquire EPC data from the RFID chips 28 of the parts management tags 13 and 17. At this time, the EPC data collected by the RFID reader by the inventory command includes status information indicating the status of the peripheral devices of the component management tags 13 and 17. That is, in the component management system 1 according to the first embodiment, status information of peripheral devices of the component management tags 13 and 17 is acquired without transmitting a read command.

  Also in the parts management system 1 according to the first embodiment, it is possible to acquire data of the user area. When acquiring data of the user area in the component management system 1 according to the first embodiment, the RFID reader transmits an inventory command each time before transmitting a read command to access the user area, and transmits the inventory command to the EPC area. It accesses and acquires the identification information of the parts management tag stored in the EPC area. That is, in the component management system 1 according to the first embodiment, the operation of the RFID reader in the case of acquiring data of the user area is the same as the operation of the RFID reader shown in FIG.

  From the above description, the parts management system 1 according to the first embodiment stores status information of peripheral devices of the parts management tags 13 and 17 in the EPC area in the memory of the RFID chip 28. Thereby, in the parts management system 1 according to the first embodiment, the RFID reader can read out the status information of the peripheral device by transmitting the inventory command. That is, in the parts management system 1 according to the first embodiment, status information of peripheral devices of the parts management tags 13 and 17 can be obtained without transmitting a read command. As a result, in the parts management system 1 according to the first embodiment, the processing speed of the system related to acquisition of status information can be increased.

  In the parts management system 1 according to the first embodiment, the control circuit 27 detects a change in the state of the peripheral device, and status information stored in the EPC area in the memory of the RFID chip 28 based on the detection result ( Update tag information). That is, in the parts management system 1 according to the first embodiment, the parts management tags 13 and 17 independently detect changes in status information of peripheral devices. As a result, in the parts management system 1 according to the first embodiment, it is not necessary to transmit a command or the like for confirming the presence or absence of a change in status information of peripheral devices from the RFID reader to the parts management tags 13 and 17. Therefore, in the parts management system 1 according to the first embodiment, it is possible to increase the processing speed of the system by reducing the number of transmissions of the command necessary for acquiring the status information of the peripheral devices of the parts management tags 13 and 17.

  Further, the component management system 1 according to the first embodiment has a specification based on the EPC (Electronic Product Code) standard and ISO 15961 as a data format of the memory of the RFID chip 28. As a result, the component management system 1 according to the first embodiment can use a general-purpose semiconductor chip as the RFID chip 28, and component procurement can be easily predicted.

  Although the above description has specifically described the invention made by the inventor based on the embodiments, the present invention is not limited to the embodiments already described, and various modifications can be made without departing from the scope of the invention. It goes without saying that changes are possible.

DESCRIPTION OF SYMBOLS 1 parts management system 10 system control part 11 antenna 12 shelves 13 parts management tag 14 parts box 15 RFID tag 16 insertion box 17 parts management tag 18 worker terminal 21 solar cell panel 22 tag antenna 23 indicator 24 display 25 management mark 26 capacitor 27 Control circuit 28 RFID chip

Claims (2)

A parts management tag having a first storage area accessed in response to an inventory command and a second storage area accessed in response to a read command;
Before accessing the second storage area and transmitting the read command, each time, to access the first storage area and transmits the inventory command, stored in the first storage area And an RFID reader for acquiring identification information of the part management tag.
The parts management tag is
An RFID chip that transmits information stored in the first storage area and the second storage area in response to a request from the RFID reader;
Peripheral devices,
Control circuitry for controlling the peripheral devices;
The component management system, wherein the control circuit stores status information indicating a state of the peripheral device in the first storage area.   The parts management system according to claim 1, wherein the data format of the first storage area and the second storage area has a specification conforming to an EPC (Electronic Product Code) standard and ISO 15961.

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