JP4958601B2 - Watching system and passing history recording method - Google Patents

Description

  The present invention relates to a watching system capable of recording a passing history of a watching target person in the entire system.

  In recent years, the spread of the Internet has made it possible to implement a remote monitoring system via a network at a low cost. On the other hand, the number of crimes is steadily increasing, and particularly violent crimes targeting children are a major social problem.

Under such circumstances, many monitoring systems have been developed by local governments and companies to protect the safety of children. 2. Description of the Related Art Conventionally, as one of monitoring systems, there has been proposed a watching system particularly for watching children attending school (see, for example, Patent Document 1). In a conventional watching system, a child who is a person to be watched has a wireless IC tag that can identify an individual, and an IC tag reader is installed in a school route for the child. When a child carrying a wireless IC tag passes near the IC tag reader, the passage of the child is detected by wireless communication with the wireless IC tag, and the passage history of the child is recorded. The passage history is stored in the Web server. The guardian of the child accesses the Web server from a personal computer at home and obtains the passage history of the child. In this way, the child's guardian can watch the child's safety from a remote location.
JP 2004-86394 A (page 3-7, FIG. 1)

  However, in the conventional system, when a large number of wireless IC tags pass near the IC tag reader at the same time during a morning school attendance or the like, a communication failure (transmission / reception error) due to wireless communication collision may occur. When the IC tag reader fails to read the wireless IC tag due to such a communication failure, there is a problem in that there is a possibility that a record of the passing history of the child who owns the wireless IC tag may be generated. .

  The present invention has been made to solve the above-described conventional problems, and can record the passing history of the person being watched over in the entire system, and prevent occurrence of a record omission of the passing history of the person being watched over. The purpose is to provide a monitoring system that can be used.

  The watch system of the present invention is a watch system comprising a plurality of watch terminals that are wirelessly communicable with the wireless tag device that the watch target person possesses and the wireless tag device, and are arranged on the travel route of the watch target person, The monitoring terminal includes: search means for transmitting a search signal for searching for the wireless tag device within a communicable area of the monitoring terminal to the wireless tag device; and the wireless tag as a response to the search signal from the wireless tag device. A notification means for transmitting, to the wireless tag device, a notification signal notifying that the reception processing of the identification information has been completed when receiving the identification information of the device, and the wireless tag device includes the monitoring terminal When the search signal is received from a reply means for returning the identification information to the watch terminal, and the search signal is received from the watch terminal. A recording means for recording a passage history indicating that the watch terminal has passed, and a recording control means for erasing the passage history when the notification signal is received from the watch terminal. Has a configuration in which, when the passing history remains without being erased, the passing history is returned to the watching terminal together with the identification information when the search signal is received from the watching terminal. .

  With this configuration, when a search signal is transmitted from the watching terminal to the wireless tag device, the wireless tag device that has received the search signal records the passage history and returns identification information. When the watching terminal receives the identification information, a notification signal is transmitted to the wireless tag device and the passage history is erased. On the other hand, when the watching terminal does not receive the identification information, the communication signal is not transmitted to the wireless tag device and the passage history is not erased. When the passage history remains without being erased, the passage history is sent back to the watching terminal together with the identification information. For example, if a communication failure has occurred in the watch terminal that passed immediately before, the pass history of the watch terminal remains in the wireless tag device without being erased. Then, the passing history is returned from the wireless tag device together with the identification information to the watching terminal that is currently passing (no communication failure has occurred). In this way, even when one watch terminal among a plurality of watch terminals fails in wireless communication with the RFID tag device, the pass history can be recorded in the entire system, and the occurrence of a record miss of the pass history can be prevented. Can do.

  The watching system of the present invention includes a watching center connected to the watching terminal via a network so that communication is possible, and the notification means transmits the identification information received from the wireless tag device to the watching center. Sometimes, the notification signal is transmitted to the RFID tag device.

  With this configuration, when the watching terminal transmits the identification information received from the wireless tag device to the watching center, a notification signal is transmitted to the wireless tag device and the passage history is erased. On the other hand, when the watching terminal does not transmit the identification information to the monitoring center, the communication signal is not transmitted to the wireless tag device, and the passing history is not erased. And as above, when the passage history remains without being erased, the passage history is returned to the watching terminal together with the identification information. For example, if the watch terminal that passed immediately before is offline (that is, not connected to the watch center via a network), the pass history of the watch terminal is not erased but remains in the wireless tag device. . Then, the passing history is returned from the RFID tag device together with the identification information to the currently passing watch terminal (online watch terminal). In this way, even if one of the plurality of watching terminals fails in network communication with the watching center, the passing history can be managed by the watching center, and the passing history can be managed by the entire system. .

  In the watching system of the present invention, the watching terminal receives the identification information received from the wireless tag device, terminal ID information specifying the watching terminal that has received the identification information, and a time at which the identification information is received. Is transmitted to the watching center.

  With this configuration, the monitoring center records identification information of the wireless tag device that has passed through the monitoring terminal, terminal ID information of the monitoring terminal, and time information when the wireless tag device has passed through the monitoring terminal. Thereby, it is possible to identify the watch terminal and time through which the watching target person has passed, and accurately grasp the route through which the watching target person has passed.

  The wireless tag device of the present invention is a wireless tag device used in the above monitoring system, and when the search signal for searching for the wireless tag device in the communicable area of the monitoring terminal is received from the monitoring terminal, Reply means for returning identification information of the wireless tag device to the watching terminal, and recording means for recording a passing history indicating that the watch terminal has passed when the search signal is received from the watching terminal, and replying Recording control means for erasing the passage history when a notification signal notifying that the reception processing of the identification information is completed is received from the watching terminal, and the reply means is erasing the passage history. When the search signal is received from the watching terminal, the passing history is returned to the watching terminal together with the identification information. It has formed.

  Even with this configuration, as described above, even when one of the plurality of watching terminals fails in wireless communication with the wireless tag device, the passing history can be recorded in the entire system, and the passing history can be recorded. Leakage can be prevented.

  The passing history recording method of the present invention includes a wireless tag device possessed by a person being watched over, and a watch system comprising a plurality of watch terminals that are wirelessly communicable with the wireless tag device and are arranged on the travel route of the person being watched over. And a search signal for searching for the RFID tag device in the communicable area of the watching terminal is transmitted from the watching terminal to the RFID tag device, and the search from the watching terminal is used. When the wireless tag device receives a signal, it records a passing history indicating that it has passed through the watching terminal, and returns identification information of the wireless tag device to the watching terminal, and is returned from the wireless tag device. When the monitoring terminal receives the identification information, a notification signal is sent from the monitoring terminal to notify that the identification information reception process has been completed. When the wireless tag device transmits to the wireless tag device and receives the notification signal from the watching terminal, the passing history is erased, and when the passing history remains without being erased, the watch When the search signal is received from the terminal, the passing history is returned to the watching terminal together with the identification information.

  Even in this method, as described above, even when one of the plurality of watching terminals fails in wireless communication with the wireless tag device, the passing history can be recorded in the entire system, and the passing history can be recorded. Leakage can be prevented.

  The present invention provides a recording means for recording a passage history when a search signal is received from a watching terminal, a recording control means for erasing the passage history when receiving a notification signal from the watching terminal, and the passage history is not erased. When the search signal is received, the RFID tag device is provided with a return means for returning the passage history so that the passage history can be recorded in the entire system, thereby preventing the passage history from being leaked. It is possible to provide a watching system having the effect of being able to.

  Hereinafter, a monitoring system according to an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, a case of a child watching system or the like in which a guardian (user) at home or at the workplace can watch the state of a child (person to be watched) attending a school or a cram school.

  A monitoring system according to an embodiment of the present invention will be described with reference to FIGS. Here, first, an outline of the overall configuration of the watching system will be described. FIG. 1 is a block diagram showing a configuration of the watching system according to the present embodiment. As shown in FIG. 1, a child who is a person to be watched by the watch system 1 has an electronic IC tag 2 (also simply referred to as an IC tag 2). The electronic IC tag 2 is, for example, a device such as an IC card such as a student ID card or a cram school certificate provided with the wireless IC tag 2 or a mobile terminal such as a mobile phone or a PDA. This electronic IC tag 2 corresponds to the wireless tag device of the present invention.

  The watching system 1 includes a watching node 3 disposed on a school road of a child who is a watching target, and a watching center 4 connected to the watching node 3 via a network so as to be communicable. The watching node 3 can wirelessly communicate with the electronic IC tag 2 possessed by the child, and can read various information from the electronic IC tag 2. Therefore, it can be said that the watching node 3 is a tag reader device. The watching node 3 is installed on a street such as a school road for children, for example, at an intersection in the middle of the school road, on the side of the road, at a school gate or entrance to a cram school. This watching node 3 corresponds to the watching terminal of the present invention.

  In the example of FIG. 1, for convenience of explanation, one electronic IC tag 2, five watching nodes 3 (watching nodes A, B, C, D, E) and one watching center 4 are illustrated. However, the numbers of the electronic IC tag 2, the monitoring node 3, and the monitoring center 4 are not limited to this. In FIG. 1, the detailed configuration is shown only for the monitoring node A among the five monitoring nodes 3, and the detailed configuration is omitted for the other monitoring nodes B, C, D, and E.

  As shown in FIG. 1, the watching node 3 has a signal transmission unit 6 having an antenna 5 that transmits a signal to an electronic IC tag 2 possessed by a child, and an antenna 7 that receives a signal from the electronic IC tag 2. A signal receiving unit 8 is provided. The watching node 3 includes a control unit 9 that watches the passing information indicating that the electronic IC tag 2 has passed the watching node 3 and transmits the passing information to the center 4.

  As shown in FIG. 1, the monitoring center 4 includes a database server 10 that manages the passing information received from the monitoring node 3 for each electronic IC tag 2 (that is, for each watching target person), and the monitoring target person (children). A data providing unit 11 that provides passage information to a user (children's guardian) is provided.

  Next, each configuration of the watching system 1 will be described in detail. Here, first, the configuration of the electronic IC tag 2 and the watching node 3 will be described. FIG. 2 is a block diagram showing the configuration of the electronic IC tag 2 and the watching node 3.

  First, the configuration of the electronic IC tag 2 will be described. As shown in FIG. 2, the electronic IC tag 2 includes a receiving unit 12 that receives a signal from the watching node 3 and a reply unit 13 that returns a signal to the watching node 3. The reply unit 13 returns the tag ID of the electronic IC tag 2 when receiving only a beacon signal described later from the watching node 3. Moreover, when the reply unit 13 receives a beacon signal and an OK signal, which will be described later, from the monitoring node 3, it returns a later-described passage history together with the tag ID. This reply unit 13 corresponds to reply means of the present invention. Here, the tag ID corresponds to the identification information of the present invention. The beacon signal corresponds to the search signal of the present invention, and the OK signal corresponds to the notification signal of the present invention.

  The electronic IC tag 2 includes a memory 14. The memory 14 includes a node ID indicating the monitoring node 3 through which the electronic IC tag 2 has passed, and the electronic IC tag 2 passes through the monitoring node 3 as a passing history. Time information and the like indicating the recorded time are recorded. The memory 14 also stores a tag ID of the electronic IC tag 2. This memory 14 corresponds to the recording means of the present invention.

  Further, the electronic IC tag 2 includes a memory control unit 15 that writes, references, and erases various data recorded in the memory 14. When the memory control unit 15 receives a beacon signal from the watching node 3, the memory control unit 15 writes the node ID of the watching node 3 in the memory 14 as a passage history. When the memory control unit 15 receives an OK signal from the monitoring node 3, the memory control unit 15 deletes the node ID of the monitoring node 3 from the memory 14. On the other hand, when the OK signal is not received from the watching node 3, the node ID is left in the memory 14 of the electronic IC tag 2 without being erased. This memory control unit 15 corresponds to the recording control means of the present invention.

  Next, the configuration of the watching node 3 will be described. Here, in particular, the configuration of the control unit 9 will be described in detail. As shown in FIG. 2, the control unit 9 includes a search unit 16 that transmits a beacon signal for searching for the electronic IC tag 2 in the communicable area. This beacon signal includes a node ID for identifying the watching node 3 that has transmitted the beacon signal. Here, the search unit 16 corresponds to search means of the present invention.

  In addition, the control unit 9 includes a notification unit 17 that transmits an OK signal for notifying completion of reception of the tag ID returned from the electronic IC tag 2 to the electronic IC tag 2. When the notification unit 17 receives the tag ID from the electronic IC tag 2 and transmits the tag ID to the center 4 while watching the tag ID, the notification unit 17 transmits an OK signal to the electronic IC tag 2. For example, when the watching node 3 cannot receive the tag IC from the electronic IC tag 2 due to a wireless communication failure with the electronic IC tag 2, the OK signal is not transmitted to the electronic IC tag 2. That is, it can be said that this OK signal is a reception completion notification from the electronic IC tag 2. Further, for example, when the monitoring node 3 cannot transmit the tag IC to the monitoring center 4 due to a network communication failure with the monitoring center 4, the OK signal is not transmitted to the electronic IC tag 2. That is, it can be said that this OK signal is a transmission completion notification to the watching center 4. Here, the notification unit 17 corresponds to a notification unit of the present invention.

  The control unit 9 includes a data temporary storage unit 18 that temporarily stores tag IDs and passage histories received from the electronic IC tag 2 (collectively referred to as tag information), and tag information (tag IDs and passage histories). A passage information creation unit 19 that creates passage information, which will be described later, and a network transmission unit 20 that transmits the passage information to the watching center 4 via the network are provided. The passage information of the present embodiment includes tag information (tag ID and passage history), a node ID (also referred to as terminal ID information) that identifies the watching node 3 that has received the tag information, and a time at which the tag information is received. The time information shown is included.

  Next, the configuration of the watching center 4 will be described in detail. Here, in particular, the configuration of the database server 10 and the data providing unit 11 will be described in detail. FIG. 3 is a block diagram showing a configuration of the watching center 4.

  As shown in FIG. 3, the database server 10 includes a network receiving unit 21 that receives passage information transmitted from the watching node 3 via the network, a database 22 that stores data such as the received passage information, and a database 22. A data registration unit 23 for performing data registration, data deletion, and the like is provided. In this database 22, for example, user login ID, password, and data providing destination (e-mail transmission destination, etc.) information are registered. In addition, the data providing unit 11 includes a request receiving unit 24 that receives a browsing history browsing request from a user, and an information transmitting unit 25 that transmits the passing information to a user who has made a browsing history browsing request.

  About the monitoring system 1 comprised as mentioned above, the operation | movement is demonstrated using FIGS. Here, first, the operation of each component of the system when a child carrying the electronic IC tag 2 passes near the watching node 3 will be described with reference to FIGS. 4 and 5.

  FIG. 4 is a flowchart showing the operation of the watching node 3 and the electronic IC tag 2. As shown in FIG. 4, first, the search unit 16 of the watching node 3 transmits a beacon signal to the electronic IC tag 2 (S1). In the present embodiment, the search unit 16 of the watching node 3 performs the wait process until a predetermined waiting time elapses (S2), and repeats the transmission of the beacon signal at a constant cycle.

  The electronic IC tag 2 is always waiting to receive from the watching node 3 (S3). When only the beacon signal is received from the watching node 3 (S4), the node ID of the watching node 3 that has transmitted the beacon signal is received. Is stored in the memory 14 as a passage history and the passage history remaining without being erased in the memory 14 is referred to (S5). If no passage history remains in the memory 14, only the tag ID is sent back to the node 3 as tag information. If there is a passage history remaining in the memory 14, the tag ID and the passage history are tagged. It returns to the watching node 3 as information (S6).

  When acquiring the tag information from the electronic IC tag 2 (S7), the control unit 9 of the watching node 3 adds the node ID and time information to the tag information (tag ID and passage history) to create passage information (S8). ), The transmission information is watched over and transmitted to the center 4 through the network (S9). When the transmission of the passing information to the watching center 4 is completed (S10), the watching node 3 transmits a beacon signal and an OK signal to the electronic IC tag 2 (S11).

  The electronic IC tag 2 is again waiting to receive from the watching node 3 (S3), not receiving only the beacon signal from the watching node 3 (S4), but receiving the OK signal together with the beacon signal (S12), The passage history in the memory 14 is deleted (S13).

  FIG. 5 is a flowchart showing the operation of the watching center 4. As shown in FIG. 5, when the database server 10 of the watching center 4 receives the passing information from the watching node 3 (S14), the passing information is stored in the database 22 (S15).

  And if the data provision part 11 of the watching center 4 receives the browsing request from a user (S16), passage information will be acquired from the database 22 (S17), and the passage information will be transmitted to a user (S18).

  Next, the operation of the entire system will be described with reference to FIG. Here, an operation when a child who has the electronic IC tag 2 (electronic IC tag A) passes in the vicinity of the five watching nodes 3 (watching nodes A, B, C, D, E) will be described. In this example, there is a wireless communication failure between the watching node B and the electronic IC tag A. The watching node D is offline with the watching center 4. The other watching nodes A, C, and E are assumed to have no communication failure.

  FIG. 6 is an explanatory diagram of the operation of the entire system. As shown in FIG. 6, when the child who has the electronic IC tag A passes near the watching node A, the watching node A transmits a beacon signal to the electronic IC tag A as described above. The electronic IC tag A records the node ID of the watching node A (passing history of the watching node A) in the memory 14 and returns the tag ID to the watching node A. When the monitoring node A succeeds in receiving the tag ID from the electronic IC tag A and successfully transmits the passing information to the monitoring center 4, the monitoring node A transmits a beacon signal and an OK signal to the electronic IC tag A. Then, the electronic IC tag A that has received the OK signal erases the passage history of the memory 14 (passing history of the watching node A).

  Next, the child possessing the electronic IC tag A passes near the watching node B. As described above, when the watching node B transmits a beacon signal to the electronic IC tag A, the electronic IC tag A records the node ID of the watching node B (passing history of the watching node B) in the memory 14, and the watching node A tag ID is returned to B. The watching node B fails to receive the tag ID from the electronic IC tag A due to a radio communication failure. Therefore, transmission of passage information to the watching center 4 also fails. In this case, the OK signal is not transmitted from the watching node B to the electronic IC tag A, and the passage history of the electronic IC tag A in the memory 14 (passing history of the watching node B) is not erased.

  Next, the child carrying the electronic IC tag A passes by the vicinity of the node C. As described above, when the watching node C transmits a beacon signal to the electronic IC tag A, the electronic IC tag A records the node ID of the watching node C (passing history of the watching node C) in the memory 14, and the watching node A tag ID is returned to C. In this case, the electronic IC tag A returns the passing history (passing history of the watching node B) that remains without being erased in the memory 14 to the watching node C together with the tag ID. When the watching node C succeeds in receiving the tag ID and the passage history from the electronic IC tag A and successfully transmits the passage information to the watching center 4, the watching node C transmits a beacon signal and an OK signal to the electronic IC tag A. Then, the electronic IC tag A that has received the OK signal deletes the passage history of the memory 14 (passing history of the watching nodes B and C).

  Next, the child possessing the electronic IC tag A passes near the watching node D. As described above, when the watching node D transmits a beacon signal to the electronic IC tag A, the electronic IC tag A records the node ID of the watching node D (passing history of the watching node D) in the memory 14, and the watching node A tag ID is returned to D. Although the monitoring node D succeeds in receiving the tag ID from the electronic IC tag A, the offline monitoring node D cannot transmit the passing information to the monitoring center 4. In this case, the OK signal is not transmitted from the watching node D to the electronic IC tag A, and the passage history of the electronic IC tag A in the memory 14 (passing history of the watching node D) is not erased.

  Next, the child carrying the electronic IC tag A passes by the vicinity of the node E. As described above, when the watching node E transmits a beacon signal to the electronic IC tag A, the electronic IC tag A records the node ID of the watching node E (passing history of the watching node E) in the memory 14, and the watching node A tag ID is returned to E. In this case, the electronic IC tag A returns the passing history (passing history of the watching node D) that remains without being erased in the memory 14 to the watching node E together with the tag ID. When the watching node E succeeds in receiving the tag ID and the passage history from the electronic IC tag A and successfully transmits the passage information to the watching center 4, the watching node E transmits a beacon signal and an OK signal to the electronic IC tag A. Then, the electronic IC tag A that has received the OK signal erases the passage history of the memory 14 (passing history of the watching nodes D and E).

  According to such a monitoring system 1 of the present embodiment, the memory 14 that records a passing history when a beacon signal is received from the watching node 3, and the passing history is deleted when an OK signal is received from the watching node 3. A plurality of watching nodes 3 by providing the electronic IC tag 2 with a memory control unit 15 that performs and when the passing history remains without being erased, a reply unit 13 that returns a passing history when a beacon signal is received. Even if one of the monitoring nodes 3 fails in wireless communication with the electronic IC tag 2, the passage history can be recorded in the entire system, and the occurrence of passage history record omission can be prevented.

  That is, in this embodiment, when a beacon signal is transmitted from the watching node 3 to the electronic IC tag 2, the electronic IC tag 2 that has received the beacon signal records a passage history and returns a tag ID. When the watching node 3 receives the tag ID, an OK signal is transmitted to the electronic IC tag 2 and the passage history is deleted. On the other hand, when the watching node 3 does not receive the tag ID, the communication signal is not transmitted to the electronic IC tag 2 and the passage history is not erased. If the passage history remains without being erased, the passage history is returned to the watching node 3 together with the tag ID.

  For example, if a wireless communication failure has occurred in the watch node B that passed immediately before, the pass history of the watch node B is not erased but remains in the electronic IC tag 2. Then, the passing history is returned from the electronic IC tag 2 together with the tag ID to the watching node C that is currently passing (no communication failure has occurred). As described above, even when one of the plurality of watching nodes 3 fails in wireless communication with the electronic IC tag 2, the passing history can be recorded in the entire system, and the passing history is not recorded. Can be prevented.

  That is, even when a wireless communication failure occurs between one or a plurality of watching nodes 3 and the electronic IC tag 2, it is possible to obtain passing information of a child who is a watching target, and to operate the system. Is possible.

  In the present embodiment, when the watch node 3 watches the tag ID received from the electronic IC tag 2 and transmits it to the center 4, an OK signal is sent to the electronic IC tag 2 and the passage history is erased. On the other hand, if the watch node 3 does not send the tag ID to the watch center 4, the communication signal is not sent to the electronic IC tag 2 and the passage history is not erased. If the passage history remains without being deleted as described above, the passage history is returned to the watching node 3 together with the tag ID.

  For example, when the watch node D that has passed immediately before is offline (that is, not connected to the watch center 4 via the network), the passing history of the watch node D is not erased and stored in the electronic IC tag 2. It is left. Then, the passing history is returned from the electronic IC tag 2 together with the tag ID to the currently watching node E (online monitoring node). In this way, even when one of the plurality of watching nodes 3 fails in network communication with the watching center 4, the watching history can be managed by the watching center 4, and the passing history is managed in the entire system. can do.

  That is, even if there is no network connection between one or a plurality of the monitoring nodes 3 and the monitoring center 4, or even when a network communication failure occurs and the network is disconnected, the person is a monitoring target person. Children's passage information can be obtained and the system can be operated.

  In the present embodiment, the monitoring center 4 has the tag ID of the electronic IC tag 2 that has passed through the monitoring node 3, the node ID of the monitoring node 3, and the time at which the electronic IC tag 2 has passed the monitoring node 3. Information is recorded. As a result, it is possible to identify the watch node 3 and the time through which the watching target person has passed, and accurately grasp the route through which the watching target person has passed.

  In the present embodiment, when transmission of passage information to the watch center 4 is successful, the passage history is erased from the memory 14 of the electronic IC tag 2, so that the memory capacity of the electronic IC tag 2 is small. The electronic IC tag 2 can be easily reduced in size and cost.

  The embodiments of the present invention have been described above by way of example, but the scope of the present invention is not limited to these embodiments, and can be changed or modified according to the purpose within the scope of the claims. is there.

  As described above, the monitoring system according to the present invention can record the passage history in the entire system even when one of the plurality of monitoring terminals fails in wireless communication with the wireless tag device. It has the effect of preventing the occurrence of history record omissions, and is useful as a monitoring system for children and a monitoring system for patients with dementia.

The block diagram which shows the structure of the watching system of this Embodiment Block diagram showing the configuration of watch node and electronic IC tag Block diagram showing the configuration of the monitoring center Flow diagram for explaining the operation of the watch node and the electronic IC tag Flow chart for explaining the operation of the monitoring center Illustration of the overall operation of the watch system

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Watching system 2 Electronic IC tag 3 Watching node 4 Watching center 9 Control part 13 Reply part 14 Memory 15 Memory control part 16 Search part 17 Notification part

Claims (5)

In the monitoring system comprising a plurality of monitoring terminals that are wirelessly communicable with the wireless tag device and the wireless tag device possessed by the monitoring target person and are arranged in the movement route of the monitoring target person,
The watch terminal is
As a search signal for searching for the wireless tag device in the communicable area of the watch terminal, a search means for transmitting a search signal including identification information of the watch terminal that transmits the search signal to the wireless tag device;
When receiving the identification information of the RFID tag device as a reply of the search signal from the RFID tag device, a notification signal for notifying that the reception processing of the identification information of the RFID tag device is completed is sent to the RFID tag device. A notification means for transmitting,
The wireless tag device is:
When the search signal is received from the watch terminal, a reply means for returning the identification information of the wireless tag device to the watch terminal;
When the search signal is received from the watch terminal, a recording means for recording a pass history including identification information of the watch terminal included in the search signal as a pass history indicating that the watch terminal has passed,
When the notification signal is received from the watching terminal, the recording control means for erasing the passage history including the identification information of the watching terminal ,
When the reply means receives the search signal from the watch terminal, and the passage history including the identification information of other watch terminals that passed before passing the watch terminal remains without being erased. the radio together with identification information of the tag device, the watching system characterized by replying to the watching terminal passage history including identification information of said other of the watching terminal. A monitoring center connected to the monitoring terminal via a network so as to be communicable,
The said notification means transmits the said notification signal to the said wireless tag apparatus, when the identification information of the said wireless tag apparatus received from the said wireless tag apparatus is transmitted to the said monitoring center. Watch system. The watching terminal, identification information of the wireless tag device received from the wireless tag device, and the terminal ID information for specifying the watching terminal has received the identification information of the wireless tag device, the identification information of the wireless tag device The watching system according to claim 2, wherein time information indicating the received time is transmitted to the watching center. A wireless tag device that communicates with a watch terminal placed on the movement route of a watch target person ,
As the search signal for searching for the wireless tag device in the communicable area of the watch terminal, a search signal including identification information of the watch terminal that transmits the search signal is transmitted from the watch terminal to the wireless tag device. ,
The wireless tag device is:
When the search signal is received from the watch terminal, a reply means for returning the identification information of the wireless tag device to the watch terminal;
Recording means for recording a passage history including identification information of the watch terminal included in the search signal as a passage history indicating that the watch signal has passed when the search signal is received from the watch terminal; Prepared,
Further, when the identification information of the RFID tag device is received as a reply of the search signal from the RFID tag device, the monitoring terminal notifies that the reception processing of the identification information of the RFID tag device is completed A signal is transmitted to the RFID tag device;
The wireless tag device is:
When the notification signal is received from the watching terminal, the recording control means for erasing the passage history including the identification information of the watching terminal ,
When the reply means receives the search signal from the watch terminal, and the passage history including the identification information of other watch terminals that passed before passing the watch terminal remains without being erased. the radio together with identification information of the tag device, a wireless tag and wherein the reply to the watching terminal passage history including identification information of said other of the watching terminal. A wireless tag device possessed by a person being watched over, and a passing history recording method used in a watch system comprising a plurality of watch terminals that are wirelessly communicable with the wireless tag device and arranged on the travel route of the person being watched over. And
The passing history recording method is:
As a search signal for searching for the RFID tag device in the communicable area of the watch terminal, a search signal including identification information of the watch terminal that transmits the search signal is transmitted from the watch terminal to the RFID tag device,
When the RFID tag device receives the search signal from the watch terminal, a passing history including identification information of the watch terminal included in the search signal is recorded as a pass history indicating that the watch terminal has passed. And returning the identification information of the RFID tag device to the watch terminal,
When the monitoring terminal receives the identification information of the wireless tag device returned from the wireless tag device, a notification signal for notifying that the reception processing of the identification information of the wireless tag device is completed is sent from the monitoring terminal to the monitoring terminal. Sent to the wireless tag device,
When receiving the notification signal from the watching terminal, erasing the passage history including the identification information of the watching terminal ,
When the search signal is received from the watching terminal, if a passing history including identification information of other watching terminals that have passed before passing the watching terminal remains without being erased , the wireless tag device together with the identification information, passage history recording method characterized by replying to the watching terminal passage history including identification information of said other of the watching terminal from the radio tag device.