JP4917583B2 - Wireless tag management system - Google Patents

Description

  The present invention relates to a wireless tag management system capable of managing a trend of a person or an object holding a wireless tag.

  Conventionally, for managing the trend of a person holding a wireless tag, for example, a first trigger signal transmitter arranged at a first position and outputting a trigger signal having a first characteristic, and a second position A second trigger signal transmitter arranged to output a trigger signal having a second characteristic different from the first characteristic, and the trigger signal received in response to the trigger signals from the first and second trigger signal transmitters A dynamic management system has been proposed that includes an ID tag that outputs an ID (Identification) number together with information for identifying the ID, and a receiver that receives the ID number output by the ID tag (see Patent Document 1).

According to this system, since the ID tag outputs an ID number together with information for specifying the received trigger signal, the ID tag uses which information from two trigger signal transmitters to determine which trigger signal transmission position. You can know what passed.
JP 2006-48399 A

  In the prior art, it is possible to know which trigger signal transmission position the ID tag has passed, but it is not sufficient for finely managing the trend of the ID tag.

  An object of the present invention is to provide a wireless tag management system capable of finely managing wireless tags.

  To achieve the above object, the present invention provides one or more trigger transmitters for transmitting a trigger ID signal specific to the trigger area in the trigger area, and a trigger ID signal mounted on a person or an object. When received, one or more wireless tags that transmit tag information including the trigger ID signal and tag ID, and when the tag information is received, time information is added to the received tag information and output. And a host for determining the position of the wireless tag based on information from the output of the receiver.

  According to the present invention, wireless tags can be managed in detail.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a wireless tag management system according to the present invention.

  In FIG. 1, the wireless tag management system 10 is mounted on a trigger transmitter 12 that transmits a trigger ID signal unique to the trigger area and an object such as a person or a vehicle, and receives the trigger ID signal. A wireless tag 14 that transmits tag information including a trigger ID signal and a tag ID, a receiver 16 that outputs time information to the received tag information when the tag information is received, and a receiver 16 A host (host computer) 18 that holds the wireless tag 14 and determines the position of a person or an object based on information by the output is configured.

  As shown in FIG. 2, the trigger transmitter 12 includes a trigger external input / output circuit 20, a power supply circuit 22, a microcomputer 24, an ID setting switch 26, a trigger signal generation circuit 28, a trigger output circuit 30, and a trigger resonance. An adjustment circuit 32, a level adjustment switch 34, and a tuning adjustment switch 36 are provided.

  The trigger external input / output circuit 20 inputs / outputs a trigger synchronization signal to / from the outside and outputs a trigger synchronization signal to the microcomputer 24. The power supply circuit 22 supplies DC power (DC 12 V) to each part of the trigger transmitter 12.

  The microcomputer 24 includes a CPU, a RAM, a ROM, and an input / output interface, receives a trigger synchronization signal from the trigger external input / output circuit 20, and performs various operations, for example, as an 8-bit trigger ID signal according to the setting of the ID setting switch 26. The calculation for transmitting the trigger ID signal specific to the trigger area is executed, and the execution result is output to the trigger signal generation circuit 28.

  The trigger signal generation circuit 28 generates a trigger ID signal specific to the trigger area based on the calculation result of the microcomputer 24, and outputs the generated trigger ID signal to the trigger output circuit 30. The trigger output circuit 30 transmits the generated trigger ID signal toward the trigger area via the antenna.

  At this time, the trigger resonance adjustment circuit 32 adjusts the resonance of the trigger ID signal, the level adjustment switch 34 adjusts the level of the trigger ID signal with 3-bit information, and the tuning adjustment switch 36 tunes the trigger ID signal. Are adjusted with 5 bits of information.

  As shown in FIG. 3, the wireless tag 14 includes a trigger antenna 40, a trigger detection circuit 42, a microcomputer 44, a battery 46, a frequency control circuit 48, an oscillation / modulation circuit 50, an output circuit 52, and a transmission. An antenna 54 is provided.

  When the trigger antenna 40 receives a trigger ID signal as a trigger radio wave (93.75 kHz) within the trigger area of the trigger transmitter 12, the trigger antenna 40 outputs the received trigger ID signal to the trigger detection circuit 42. The trigger detection circuit 42 outputs a trigger detection signal to the microcomputer 44 when the trigger antenna 40 receives the trigger ID signal.

  The microcomputer 44 transmits the tag information including the trigger ID signal and the tag ID as a calculation process when the trigger antenna 40 receives the trigger ID signal when the trigger detection signal is input from the trigger detection circuit 42. Then, arithmetic processing for controlling the frequency control circuit 48, the oscillation / modulation circuit 50, and the output circuit 52 is executed, and the frequency control circuit 48, the oscillation / modulation circuit 50, and the output circuit 52 are controlled according to the arithmetic result.

  The output circuit 52 transmits tag information including the trigger ID signal and the tag ID from the transmission antenna 54 using a 300 MHz band radio wave.

  As shown in FIG. 4, the receiver 16 includes a receiving unit 60, a power supply circuit 62, a data buffer 64, a one-chip microcomputer 66, a data processing circuit 68, a base circuit 70, and a digital input / output circuit 72. The base circuit 70 is connected to the host 18 via the LAN 74.

When receiving the tag information transmitted from the transmitting antenna 54, the receiving unit 60 outputs the tag information to the data processing circuit 68 as digital tag information. The data processing circuit 68 processes the tag information, processes the data input from the digital input / output circuit 72, and outputs each processing result to the one-chip microcomputer 66.
The one-chip microcomputer 66 processes the data from the data processing circuit 68 and the data buffer 64, and transfers, for example, tag information to which time information is added to the host 18 via the base circuit 70 and the LAN 74 as the processing result. To do.

  The host 80 is constituted by, for example, a personal computer and determines the position of a person or an object holding the wireless tag 14 based on tag information to which time information is added, or the trigger transmitter 12 or the wireless tag 14. Or to generate information for controlling.

  Next, an effect | action at the time of performing work management of an operator using the wireless tag management system 10 is demonstrated based on FIG.

  In this embodiment, the trigger transmitter 12A is arranged outside the entrance 102 of the building 100, the trigger transmitter 12B is arranged inside, the trigger transmitter 12C is arranged in the work place A, and the trigger transmitter 12D is arranged in the work place B. The case will be described. The trigger transmitters 12 </ b> A to 12 </ b> D are configured with the same function as the trigger transmitter 12.

  First, the trigger transmitters 12A and 12B are always in a transmission state, and the trigger transmitters 12C and 12D are in a stop state. In this state, when the worker holding the wireless tag 14 approaches the entrance 102 of the building 100, the wireless tag 14 of the worker receives the trigger ID signal 01 generated by the transmission of the trigger transmitter 12A. Thereby, the wireless tag 14 of the worker transmits tag information including the trigger ID signal 01 and the tag ID. When the tag information is received by the receiver 16, the receiver 16 adds time information to the received tag information and forwards it to the host 18. As a result, the host 18 can detect that an operator holding the wireless tag 14 has approached the entrance 102 of the building 100.

  Next, when the worker holding the wireless tag 14 enters the building 100 from the entrance 102, the wireless tag 14 of the worker receives the trigger ID signal 02 from the transmission of the trigger transmitter 12B. Thereby, the wireless tag 14 of the worker transmits tag information including the trigger ID signal 02 and the tag ID. When the tag information is received by the receiver 16, the receiver 16 adds time information to the received tag information and forwards it to the host 18. Thereby, the host 18 can detect that the worker holding the wireless tag 14 has entered the building 100 from the entrance 102.

  Thereafter, the host 18 instructs the trigger transmitter 12 </ b> C to perform transmission on the condition that the worker holding the wireless tag 14 enters the building 100 from the entrance 102. Thereby, trigger transmitter 12C will be in a transmission state.

  Next, when the worker holding the wireless tag 14 starts working in the workplace A, the wireless tag 14 of the worker receives the trigger ID signal 03 generated by the transmission of the trigger transmitter 12C. Thereby, the wireless tag 14 of the worker transmits tag information including the trigger ID signal 03 and the tag ID. When the tag information is received by the receiver 16, the receiver 16 adds time information to the received tag information and forwards it to the host 18. As a result, the host 18 can detect that the worker holding the wireless tag 14 is working in the workplace A.

  Thereafter, the host 18 instructs the trigger transmitter 12C to increase the trigger transmission interval. Thereby, the trigger transmission interval of the trigger transmitter 12C becomes longer.

  When the trigger transmission interval of the trigger transmitter 12C becomes longer, the worker is also in the workplace A for the transmission interval of the tag information transmitted from the wireless tag 14 of the worker who receives the trigger ID signal 03 by the transmission of the trigger transmitter 12C. The interval becomes longer. Thereby, the power consumption of the power supply circuit 22 of the trigger transmitter 12C and the battery 46 of the wireless tag 14 can be suppressed.

  When the work by the worker is completed, the host 18 instructs the trigger transmitter 12C to stop transmission.

  When the worker approaches the entrance / exit 102 from the work place A with the completion of the work, the wireless tag 14 of the worker receives the trigger ID signal 02 generated by the trigger transmitter 12B. Thereby, the wireless tag 14 of the worker transmits tag information including the trigger ID signal 02 and the tag ID. When the tag information is received by the receiver 16, the receiver 16 adds time information to the received tag information and forwards it to the host 18. Accordingly, the host 18 can detect that the worker holding the wireless tag 14 has approached the entrance 102.

  Thereafter, when the worker goes out of the building 100 from the entrance 102, the wireless tag 14 of the worker receives the trigger ID signal 01 generated by the transmission of the trigger transmitter 12A. Thereby, the wireless tag 14 of the worker transmits tag information including the trigger ID signal 01 and the tag ID. When the tag information is received by the receiver 16, the receiver 16 adds time information to the received tag information and forwards it to the host 18. Thereby, the host 18 can detect that the worker holding the wireless tag 14 has gone out of the building 100 from the entrance 102.

  According to the present embodiment, it is possible to manage entry / exit and work of an operator who uses the building 100.

  Next, an operation when the wireless tag management system 10 is used to detect theft of valuables and manage take-out will be described with reference to FIG.

  In the present embodiment, the trigger transmitter 12A is arranged outside the entrance 102 of the building 100, the trigger transmitter 12B is arranged inside, the valuable items are arranged in the valuable storage area C, and the valuable items are unique to the valuable items. A case where a wireless tag 14 that transmits a tag ID is attached will be described. The trigger transmitters 12 </ b> A and 12 </ b> B are configured to have the same function as the trigger transmitter 12.

  First, the trigger transmitters 12A and 12B are always in a transmission state. In this state, when the worker (A) holding the wireless tag 14 approaches the entrance 102 of the building 100, the wireless tag 14 of the worker (A) receives the trigger ID signal 01 generated by the trigger transmitter 12A. Thereby, the wireless tag 14 of the worker transmits tag information including the trigger ID signal 01 and the tag ID. When the tag information is received by the receiver 16, the receiver 16 adds time information to the received tag information and forwards it to the host 18. Thereby, the host 18 can detect that the worker (A) holding the wireless tag 14 has approached the entrance 102 of the building 100.

  Next, when the worker (A) holding the wireless tag 14 enters the building 100 from the entrance 102, the wireless tag 14 of the worker (A) receives the trigger ID signal 02 generated by the transmission of the trigger transmitter 12B. Thereby, the wireless tag 14 of the worker transmits tag information including the trigger ID signal 02 and the tag ID. When the tag information is received by the receiver 16, the receiver 16 adds time information to the received tag information and forwards it to the host 18. Thereby, the host 18 can detect that the worker holding the wireless tag 14 has entered the building 100 from the entrance 102.

  Next, when the worker (A) holding the wireless tag 14 brings valuables from the valuable storage area C and approaches the entrance 102, the wireless tag 14 of the worker (A) and the wireless tag 14 of valuables trigger transmission. The trigger ID signal 02 from the transmission of the machine 12B is received almost simultaneously. As a result, the wireless tag 14 of the worker and the valuable wireless tag 14 transmit the tag information including the trigger ID signal 02 and the tag ID almost simultaneously. When these pieces of tag information are received by the receiver 16 at substantially the same time, the receiver 16 adds time information to each received tag information and transfers it to the host 18. Thereby, the host 18 can detect that the worker holding the wireless tag 14 has approached the doorway 102 with valuables by identifying each tag information.

  Thereafter, when the worker goes out of the building 100 through the doorway 102, the worker's wireless tag 14 and the valuable wireless tag 14 receive the trigger ID signal 01 transmitted from the trigger transmitter 12A substantially simultaneously. Thus, the wireless tag 14 of the worker and the valuable wireless tag 14 transmit the tag information including the trigger ID signal 01 and the tag ID substantially simultaneously. When the tag information is received by the receiver 16, the receiver 16 adds time information to each received tag information and transfers it to the host 18. As a result, the host 18 can detect that the worker holding the wireless tag 14 has taken valuables out of the building 100 from the entrance 102.

  On the other hand, when a person (B) who does not have the wireless tag 14 enters the building 100 from the entrance 102, tag information is not transmitted from the person (B) who does not have the wireless tag 14, so the host 18 It cannot be detected that a person (B) who does not have 14 enters the building 100.

  However, when a person (B) who does not have the wireless tag 14 takes out the valuables from the valuable storage area C and approaches the entrance 102, the wireless tag 14 of the valuables receives the trigger ID signal 02 generated by the transmission of the trigger transmitter 12B. . As a result, the valuable wireless tag 14 transmits tag information including the trigger ID signal 02 and the tag ID. When the tag information is received by the receiver 16, the receiver 16 adds time information to the received tag information and forwards it to the host 18. As a result, the host 18 receives only tag information from valuables and does not receive tag information from a person who should hold the wireless tag 14, and therefore determines that the theft has occurred.

  At this time, the host 18 instructs the trigger transmitters 12A and 12B to set the wireless tag 14 to the constant transmission mode and the alarm mode, and transmits the constant transmission command and the alarm command.

  When a person (B) having valuables passes through the doorway 102, the wireless tag 14 of valuables receives a constant transmission command and an alarm command from the trigger transmitters 12A and 12B. As a result, the valuable wireless tag 14 is always in the transmission mode, and transmits even without triggers from the trigger transmitters 12A and 12B and other trigger transmitters, and generates a buzzer sound in the alarm mode. As a result, a valuable item in which a buzzer sound is generated can be easily detected as a stolen item.

  According to the present embodiment, even if a person who does not hold the wireless tag 14 takes out valuables from the building 100, a buzzer is generated from the valuables, so that a stolen item can be easily detected.

  Next, the operation of the embodiment relating to the prevention of forgery of radio waves transmitted by the wireless tag will be described with reference to FIG.

  In this embodiment, the trigger ID signal of the trigger transmitter 12 is a trigger ID signal 01.

  When a certain wireless tag 14 enters the trigger area of the trigger transmitter 12, the wireless tag 14 receives a trigger ID signal 01 generated by the trigger transmitter 12. Thereby, the wireless tag 14 transmits tag information including the trigger ID signal 01 and the tag ID. When the tag information is received by the receiver 16, the receiver 16 adds time information to the received tag information and forwards it to the host 18.

  The host 18 that has received the tag information instructs, for example, the trigger transmitter 12 to change the trigger ID signal 01 to the trigger ID signal 02 in order to prevent forgery of the radio wave transmitted by the wireless tag 14. .

  Upon receiving this instruction, the trigger transmitter 12 oscillates the trigger ID signal 02. The tag that has received the trigger ID signal 02 transmits tag information including the trigger ID signal 02 and the tag ID. When the tag information is received by the receiver 16, the receiver 16 adds time information to the received tag information and forwards it to the host 18. Thereby, the host 18 can detect that the trigger transmitter 12 has changed the trigger ID signal 01 to the trigger ID signal 02.

  Here, the host 18 further instructs to return the trigger ID signal 02 to the trigger ID signal 01.

  However, it is not possible to cope with the change of the trigger ID by simply recording and reproducing radio waves.

  Therefore, when the host 18 receives the tag information including the trigger ID signal 02 and the tag ID and the time information as information from the trigger transmitter 12, the host 18 sends the trigger transmitter 12 to the trigger transmitter 12 from the trigger transmitter 12. The wireless tag 14 is instructed to output a change command for urging the tag ID to be changed.

  When the trigger transmitter 12 transmits a change command to the wireless tag 14, the wireless tag 14 that has received the change command transmits tag information including the changed tag ID and the trigger ID signal 01. When the tag information is received by the receiver 16, the receiver 16 adds time information to the received tag information and forwards it to the host 18. Thereby, the host 18 identifies the received information, and when the received information includes tag information including the changed tag ID and the trigger ID signal 01, the host 18 determines that the change method is as instructed, and performs authentication. Do. Thereby, forgery of the radio wave transmitted by the wireless tag 14 can be prevented.

  According to this embodiment, it is possible to prevent forgery of radio waves transmitted by the wireless tag 14.

  Further, regarding the instruction for changing the tag ID of the wireless tag 14, it is possible to prevent impersonation of the tag by a method such as giving a parameter of some arithmetic expression.

  In each embodiment, when a plurality of wireless tags 14 are used, the transmission timing of each wireless tag 14 can be set to a different timing according to the random number table.

  Furthermore, a CRC code may be added to the tag information, or the wireless tag 14 may have a case structure in which energization is started when the case is enclosed in order to prevent battery consumption in a stock state.

1 is a block configuration diagram of a wireless tag management system according to the present invention. FIG. It is a block block diagram of a trigger transmitter. It is a block block diagram of a wireless tag. It is a block block diagram of a receiver. It is a figure for demonstrating an effect | action when performing a worker's work management. It is a figure for demonstrating an effect | action when performing theft detection and taking-out management of valuable goods. It is a figure for demonstrating the effect | action of the Example which concerns on the forgery prevention of the electromagnetic wave which a wireless tag transmits.

Explanation of symbols

10 RFID tag management system 12 Trigger transmitter 14 RFID tag 16 Receiver 18 Host

Claims (4)

One or more trigger transmitters for transmitting a trigger ID signal specific to the trigger area in the trigger area;
Upon receiving a pre-Symbol trigger ID signal, and one or more wireless tags for transmitting tag information including the trigger ID signal and the tag ID,
When receiving the tag information, a receiver that outputs time information added to the received tag information; and
A host for determining the position of the wireless tag based on information from the output of the receiver ;
Equipped with a,
When the trigger transmitter changes the content of the trigger ID signal according to an instruction from the host, the trigger transmitter transmits a change command instructing the wireless tag to change the content of the tag ID,
When the host receives information associated with each change from the receiver, the host determines whether the content of each change is as instructed based on the received information.
Wireless tag management system. The wireless tag management system according to claim 1,
The trigger transmitter changes the trigger ID signal from the first trigger ID signal to the second trigger ID signal in accordance with an instruction from the host, and then returns to the first trigger ID signal.
Wireless tag management system. One or more trigger transmitters for transmitting a trigger ID signal specific to the trigger area in the trigger area;
One or more wireless tags that transmit tag information including the trigger ID signal and a tag ID when the trigger ID signal is received;
When receiving the tag information, a receiver that outputs time information added to the received tag information; and
A host for determining the position of the wireless tag based on information from the output of the receiver;
With
When the host receives only the tag information from the wireless tag attached to the object when the wireless tag attached to the person and the wireless tag attached to the object are to be monitored, Send a command to execute the constant transmission mode and alarm mode,
The trigger transmitter that has received the command, the radio tag or by supplying an always outgoing mode and alarm mode,
Wireless tag management system. In the wireless tag management system according to any one of claims 1 to 3,
The host instructs the trigger transmitter to change the transmission interval of the trigger ID signal,
When the trigger transmitter receives an instruction to change the transmission interval of the trigger ID signal from the host, the trigger transmitter changes the transmission interval of the trigger ID signal according to the instruction.

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