WO2018025405A1

WO2018025405A1 - Radio communication device and room entry/exit control system using said radio communication device

Info

Publication number: WO2018025405A1
Application number: PCT/JP2016/073126
Authority: WO
Inventors: 安藤　暢彦
Original assignee: 三菱電機株式会社
Priority date: 2016-08-05
Filing date: 2016-08-05
Publication date: 2018-02-08

Abstract

An RFID tag for a room entry/exit control system includes: a receiving unit that receives an inquiry radio wave transmitted from a tag data receiver and including an identification code for identifying the tag data receiver; a transmitting unit that transmits a response radio wave including the identification code upon reception of the inquiry radio wave by the receiving unit; and a transmission history storage unit that stores identification codes included in response radio waves that have been transmitted by the transmitting unit in the past. When a plurality of inquiry radio waves including identification codes are received by the receiving unit, the transmitting unit of the RFID tag transmits only a response radio wave including a specific identification code on the basis of the identification codes included in the inquiry radio waves and the identification codes stored in the transmission history storage unit.

Description

Wireless communication device and entrance / exit management system using the wireless communication device

The present invention relates to an entrance / exit management system, and more particularly to an entrance / exit management system using a wireless communication device such as an RFID tag carried by a user.

An entrance / exit management system including a wireless communication device such as an RFID tag carried by a user and a plurality of receiving devices that receive radio waves from the wireless communication device is known (for example, see Patent Document 1).

FIG. 18 shows an example of a conventional entrance / exit management system. This entrance / exit management system includes a plurality of tag data receivers 610a to 610d installed in a management area composed of a passage A and a room B, an RFID tag 620 carried by a user who enters and exits the room B, and tag data. The management server 630 manages the receivers 610a to 610d.

The tag data receivers 610a to 610d each transmit an interrogation radio wave at a constant cycle. In the figure, areas Ra to d are areas (coverage areas) where the interrogation radio waves of the tag data receivers 610a to 610d can reach. For example, when the user carrying the RFID tag 620 enters the coverage area Ra of the tag data receiver 610a, the RFID tag 620 receives the interrogation radio wave of the tag data receiver 610a and transmits a response radio wave to the interrogation radio wave. . When the tag data receiver 610a receives this response radio wave, the management server 630 knows that the user is in the vicinity of the tag data receiver 610a.

JP 2008-70957 A

However, as shown in FIG. 18, in the conventional entrance / exit management system, the coverage area Rb of the tag data receiver 610b installed on the entrance side of the room B and the tag installed on the exit side of the room B If the coverage area Rc of the data receiver 610c is overlapped, the RFID tag 620 is connected to the interrogation radio wave from the tag data receiver 610b and the tag data receiver 610c in the process of the user trying to enter the room B from the passage A. May be received together.

In that case, the RFID tag 620 responds to both the tag data receiver 610b and the tag data receiver 610c, and the management server 630 cannot determine whether the user is entering or leaving the room. .

This invention was made to solve such a problem, and even when the coverage areas of a plurality of tag data receivers overlap, it is possible to accurately determine the user's entry and exit, The purpose is to provide an entrance / exit management system.

A wireless communication device (RFID tag) of an entrance / exit management system according to the present invention includes: a receiving unit that receives an interrogation radio wave that includes an identification code that is transmitted from a receiving device (tag data receiver) and identifies the receiving device; A transmission unit that transmits a response radio wave including the identification code upon reception of the interrogation radio wave by the transmission unit, and a transmission history storage unit that stores an identification code included in the response radio wave transmitted by the transmission unit in the past, When a plurality of interrogation radio waves including an identification code are received by the receiving unit, a specific code is generated based on the identification code included in the interrogation radio wave and the identification code stored in the transmission history storage unit. Only a response radio wave including an identification code is transmitted.

According to the entry / exit management system according to the present invention, even when the coverage areas of a plurality of tag data receivers overlap, it is possible to accurately determine the user's entry and exit.

It is a figure which shows the structure of the entrance / exit management system which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of a tag data receiver and an RFID tag in the entrance / exit management system which concerns on Embodiment 1 of this invention. It is a flowchart which shows operation | movement of the RFID tag in the entrance / exit management system which concerns on Embodiment 1 of this invention. It is a figure which shows an example of a user's movement which carries an RFID tag in the entrance / exit management system which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the content of the transmission history memory | storage part of an RFID tag in the entrance / exit management system which concerns on Embodiment 1 of this invention. It is a figure which shows the structure of a tag data receiver and an RFID tag in the entrance / exit management system which concerns on Embodiment 2 of this invention. It is a figure which shows an example of the installation position data of a tag data receiver in the entrance / exit management system which concerns on Embodiment 2 of this invention. It is a figure which shows an example of the movement of the user who carries an RFID tag in the entrance / exit management system which concerns on Embodiment 2 of this invention. It is a figure which shows the structure of a tag data receiver and an RFID tag in the entrance / exit management system which concerns on Embodiment 3 of this invention. It is a figure which shows an example of the installation condition of the tag data receiver in the entrance / exit management system which concerns on Embodiment 3 of this invention. It is a figure which shows an example of the content of the installation position memory | storage part of an RFID tag in the entrance / exit management system which concerns on Embodiment 3 of this invention. It is a table which shows operation | movement of the RFID tag in the entrance / exit management system which concerns on Embodiment 3 of this invention. It is a figure which shows the structure of a tag data receiver and an RFID tag in the entrance / exit management system which concerns on Embodiment 4 of this invention. It is a figure which shows the structure of the transmission history memory | storage part of an RFID tag in the entrance / exit management system which concerns on Embodiment 4 of this invention. It is a figure which shows an example of the installation condition of the tag data receiver in the entrance / exit management system which concerns on Embodiment 4 of this invention. It is a figure which shows the structure of the entrance / exit management system which concerns on Embodiment 5 of this invention. It is a figure which shows the structure of a tag data receiver and an RFID tag in the entrance / exit management system which concerns on Embodiment 5 of this invention. It is a figure which shows an example of the entrance / exit management system which concerns on a prior art.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of an entrance / exit management system according to Embodiment 1 of the present invention.
The entrance / exit management system includes a plurality of tag data receivers (receiving devices) 10a to 10d installed in a management area composed of a passage A and a room B, and an RFID tag (wireless) carried by a user who enters and exits the room B. Communication device) 20 and a management server 30 for managing the tag data receivers 10a to 10d. In the drawing, areas Ra to d are areas (coverage areas) where the interrogation radio waves of the tag data receivers 10a to 10d can reach.

FIG. 2 is a diagram illustrating the configuration of the tag data receiver 10 and the RFID tag 20.
The tag data receiver 10 includes a transmission unit 11 that transmits an interrogation radio wave including an identification code 13 of the own device and a reception unit 12 that receives a response radio wave from the RFID tag 20. The tag data receiver 10 transmits an interrogation radio wave including the identification code 13 of its own device at a constant cycle. If the response radio wave from the RFID tag 20 includes the identification code 13 of the own device, the tag data receiver 10 determines that the response radio wave is a response to the interrogation radio wave transmitted by the own device. To do. On the other hand, when the response radio wave from the RFID tag 20 does not include the identification code 13 of the own device, the tag data receiver 10 determines that the response radio wave is not a response to the interrogation radio wave transmitted by the own device. To do.

The RFID tag 20 includes a reception unit 21 that receives the interrogation radio wave including the identification code 13 transmitted from the tag data receiver 10, and a response radio wave that includes the identification code 13 when the interrogation radio wave is received by the reception unit 21. And a transmission history storage unit 23 for storing the identification code 13 included in the response radio wave transmitted in the past by the transmission unit 22. When a plurality of interrogation radio waves including the identification code 13 are received by the reception unit 21, the transmission unit 22 of the RFID tag 20 stores the identification code 13 included in the interrogation radio wave and the transmission history storage unit 23. Only the response radio wave including the specific identification code 13 is transmitted based on the identified identification code 13.

FIG. 3 is a flowchart showing the operation of the RFID tag 20.
When the interrogation radio wave transmitted from the tag data receiver 10 is received by the reception unit 21 (S101), the transmission unit 22 of the RFID tag 20 determines whether or not a plurality of identification codes 13 are included in the interrogation radio wave. Determine (S102).

The fact that a plurality of identification codes 13 are included in the received interrogation radio wave means that a plurality of interrogation radio waves respectively transmitted from the plurality of tag data receivers 10 have been received. On the other hand, the fact that only one identification code 13 is included in the received interrogation radio wave means that only a single interrogation radio wave transmitted from the single tag data receiver 10 has been received. .

The transmission unit 22 of the RFID tag 20 stores the identification code 13 in the transmission history storage unit 23 when only one identification code 13 is included in the interrogation radio wave received in S101 (S102 = NO). Later (S103), a response radio wave including the identification code 13 is transmitted (S104).

On the other hand, when a plurality of identification codes 13 are included in the interrogation radio wave received in S101 (S102 = YES), the transmission unit 22 sets the identification code 13 stored in the transmission history storage unit 23 immediately before. The search is performed in order from the stored one, and in the process, when one that matches one of the plurality of identification codes 13 received in S101 is found (S105 = YES), the transmitting unit 22 After the matched identification code 13 is stored in the transmission history storage unit 23 (S106), a response radio wave including the identification code 13 is transmitted (S107).

On the other hand, when the identification code 13 stored in the transmission history storage unit 23 does not match any of the plurality of identification codes 13 received in S101 (S105 = NO), the transmission unit 22 Stores the identification code 13 included in the interrogation radio wave received at the earliest in the reception process of S101 in the transmission history storage unit 23 (S108), and then transmits the response radio wave including the identification code 13 (S109).

FIG. 4 shows an example in which the user carrying the RFID tag 20 moves along the arrow line T in the figure and enters the room B from the passage A. In this figure, the transmitter 22 of the RFID tag 20 transmits a response radio wave including the identification code 13a included in the interrogation radio wave from the tag data receiver 10a at 12:33:56, and the time is 12:34. At 56 seconds, a response radio wave including the identification code 13b included in the interrogation radio wave from the tag data receiver 10b is transmitted. At this time, the contents of the transmission history storage unit 23 of the RFID tag 20 are as shown in FIG.

At 12:35:00 in FIG. 4, the receiving unit 21 of the RFID tag 20 receives both the interrogation radio wave transmitted from the tag data receiver 10b and the interrogation radio wave transmitted from the tag data receiver 10c. (S101, S102 = YES). At this time, the transmission unit 22 of the RFID tag 20 searches the identification code 13 stored in the transmission history storage unit 23 in order from the one stored immediately before (S105).

When the identification code stored in the transmission history storage unit 23 in FIG. 5A is searched retrospectively, among the identification codes 13b and 13c received in S101, the one that matches the identification code 13b is the transmission history. It is found from the storage unit 23 (S105 = YES). Therefore, the transmission unit 22 stores the matched identification code 13b in the transmission history storage unit 23 (S106, FIG. 5B), and then transmits a response radio wave including the identification code 13b (S107).

Thus, when the user carrying the RFID tag 20 tries to enter the room B from the passage A, when the interrogation radio wave from the tag data receiver 10b and the interrogation radio wave from the tag data receiver 10c are received together. The transmitter 22 of the RFID tag 20 responds only to the tag data receiver 10b installed on the passage A side (incoming side). As a result, the management server 30 can determine that the user carrying the RFID tag 20 is about to enter the room B.

Embodiment 2. FIG.
Next, an entrance / exit management system according to Embodiment 2 of the present invention will be described.
FIG. 6 is a diagram showing the configuration of the tag data receiver 10 and the RFID tag 220 in the entrance / exit management system according to the second embodiment. The configuration of the tag data receiver 10 is the same as that of the first embodiment.

The RFID tag 220 includes an installation position storage unit 224 that stores the identification codes 13a to 13d of the tag data receivers 10a to 10d and the installation position data in association with each of the tag data receivers 10a to 10d. ing.

The installation position data of the tag data receivers 10a to 10d is identification information indicating an area in which the tag data receivers 10a to 10d are installed, for example, data that can identify the inside and outside of the room B. Specifically, as shown in FIG. 7, if the area where the tag data receiver 10 is installed is the passage A side, the value of “passage”, and if in the room B, the value of “room” is set. It is data to take. For example, when there are a plurality of rooms and passages, the data may be expanded to data that can identify the rooms and passages. Moreover, you may make it include the information of the installation floor of the tag data receiver 10. FIG.

When the interrogation radio wave including the identification code 13 is received by the reception unit 21, the transmission unit 222 of the RFID tag 220 is stored in the transmission code storage unit 23 with the identification code 13 included in the interrogation radio wave. Whether to transmit a response radio wave is determined based on the identification code 13 and the installation position data stored in the installation position storage unit 224.

For example, as shown in FIG. 8, after the user enters the room B through the passage T2 instead of the regular route T1 passing through the coverage area Rb of the tag data receiver 10b, the receiving unit 21 of the RFID tag 220 receives the tag data. When the interrogation radio wave of the receiver 10d is received, the transmission unit 222 determines that the response radio wave is “not transmitted”. As a result, in a system in which the tag data receiver 10d and room lighting are linked, when the user enters the room B through a route other than the regular route T1, it is possible to provide an entrance / exit management system that does not turn on the lighting. .

Embodiment 3 FIG.
Next, an entrance / exit management system according to Embodiment 3 of the present invention will be described.
FIG. 9 is a diagram showing the configuration of the tag data receiver 10 and the RFID tag 320 in the entrance / exit management system according to the third embodiment. The configuration of the tag data receiver 10 is the same as that of the first embodiment.

When the interrogation radio wave including the identification code 13 is received by the reception unit 21, the transmission unit 322 of the RFID tag 320 is stored in the transmission code storage unit 23 with the identification code 13 included in the interrogation radio wave. Whether or not to transmit a response radio wave is determined based on the identification code 13 transmitted immediately before the transmission and the installation position data of each tag data receiver 10a to 10d stored in the installation position storage unit 324.

For example, as shown in FIG. 10, tag data receivers 10a to 10d are installed on the first floor of a building, and tag data receivers 10e to 10h are installed on the second floor of a building. Consider the case where the contents of 324 are as shown in FIG. Note that the installation position data in FIG. 11 uniquely identifies the tag data receivers 10a to 10h by the data structure of (“floor”) + (“passage” or “room” or “entrance side” or “exit side”). Identify.

When the interrogation radio wave including the identification code 13 is received by the reception unit 21, the transmission unit 322 of the RFID tag 320 determines whether or not to transmit a response radio wave to the interrogation radio wave based on the table shown in FIG. To decide. For example, if the identification code 13d is included in the response radio wave transmitted last time and the identification code 13c is included in the inquiry radio wave received this time, this is indicated by “(same floor) in the table of FIG. This corresponds to the case of “No. Therefore, the transmission unit 322 determines to “transmit” the response radio wave.

With the above configuration, when the RFID tag 320 receives an interrogation radio wave from the tag data receiver 10 installed on a different floor or in a different area from where the user is currently located, It is possible to prevent the response radio wave from being erroneously transmitted to the interrogation radio wave.

Embodiment 4 FIG.
Next, an entrance / exit management system according to Embodiment 4 of the present invention will be described.
FIG. 13 is a diagram showing a configuration of the tag data receiver 10 and the RFID tag 420 in the room entrance / exit management system according to the fourth embodiment. The configuration of the tag data receiver 10 is the same as that of the first embodiment.

The reception unit 421 of the RFID tag 420 is configured to acquire the reception time of the identification code 13 included in the received interrogation radio wave. Further, the transmission history storage unit 423 of the RFID tag 420 is configured to store the transmission time of the identification code 13 included in the response radio wave transmitted by the transmission unit 442 in the past. Specifically, as shown in FIG. 14, the transmission history storage unit 423 stores the identification code 13 included in the response radio wave transmitted in the past and its transmission time in association with each other.

When the interrogation radio wave including the identification code 13 is received by the reception unit 421, the transmission unit 422 of the RFID tag 420 receives the identification code 13 included in the interrogation radio wave, the reception time thereof, and the transmission history storage unit 223. A response radio wave is transmitted on the basis of the identification code 13 transmitted immediately before and the transmission time thereof and the installation position data of each tag data receiver 10a to 10h stored in the installation position storage unit 324. Determine whether or not.

With the above configuration, it becomes possible to calculate the travel time from one tag data receiver 10 to another tag data receiver 10, and the travel time and the distance between the two tag data receivers 10 can be calculated. When a question radio wave is received from the tag data receiver 10 installed on a different floor from the floor where the user is present, the response radio wave is erroneously transmitted in response to the travel distance. Can be prevented.

For example, in the situation shown in FIG. 15, immediately after transmitting a response radio wave to the tag data receiver 10a installed in the “passage” on the first floor (for example, after 3 seconds), the “entrance side” on the second floor When receiving the interrogation radio wave of the tag data receiver 10f installed at “”, the transmission unit 422 determines that the response radio wave is “not transmitted”.

Embodiment 5 FIG.
Next, an entrance / exit management system according to Embodiment 5 of the present invention will be described.
FIG. 16 is a diagram illustrating a configuration of an entrance / exit management system according to the fifth embodiment. As shown in this figure, a door 540 with an electronic lock is provided at the entrance to and from the passage A and the room B, and unlocking or locking of the electronic lock is controlled by the management server 530.

FIG. 17 is a diagram showing the configuration of the tag data receiver 10 and the RFID tag 520 in the entrance / exit management system according to the fifth embodiment. The configuration of the tag data receiver 10 is the same as that of the first embodiment. The configuration of the RFID tag 520 is the same as that in Embodiment 3 except for the transmission unit 522.

In the transmission unit 522 of the RFID tag 520, the identification code 13 transmitted immediately before stored in the transmission history storage unit 23 is the identification code 13a of the tag data receiver 10a or the identification code 13b of the tag data receiver 10b, and When the interrogation radio wave including the identification code 13b of the tag data receiver 10b is received by the receiving unit 21, the response radio wave for the interrogation radio wave is transmitted including the personal identification code 525 for identifying the owner of the own apparatus.

Further, in the transmission unit 522 of the RDID tag 520, the identification code 13 transmitted immediately before being stored in the transmission history storage unit 23 is the identification code 13d of the tag data receiver 10d or the identification code 13c of the tag data receiver 10c. When the interrogation radio wave including the identification code 13b of the tag data receiver 10b is received by the receiving unit 21, the response radio wave for the interrogation radio wave is not transmitted.

Further, in the transmission unit 522 of the RFID tag 520, the identification code 13 transmitted immediately before being stored in the transmission history storage unit 23 is the identification code 13a of the tag data receiver 10a or the identification code 13b of the tag data receiver 10b. When the interrogation radio wave including the identification code 13c of the tag data receiver 10c is received by the receiving unit 21, the response radio wave for the interrogation radio wave is not transmitted.

Further, in the transmission unit 522 of the RFID tag 520, the identification code 13 transmitted immediately before being stored in the transmission history storage unit 23 is the identification code 13d of the tag data receiver 10d or the identification code 13c of the tag data receiver 10c. When the interrogation radio wave including the identification code 13c of the tag data receiver 10c is received by the receiving unit 21, the response radio wave to the interrogation radio wave is transmitted including the personal identification code 525 for identifying the owner of the own machine. .

The management server 530 is attached to the door 540 based on the authentication result of the personal identification code 525 included in the response radio wave transmitted by the RFID tag 520 and received by the tag data receiver 10b or the tag data receiver 10c. Control the unlocking or locking of electronic locks.

If, for example, tag data receivers 10e to 10h are installed on a different floor from FIG. 14, the transmission unit 522 of the RFID tag 520 is stored in the transmission history storage unit 23. The identification code 13 transmitted immediately before is the identification code 13e-h of the tag data receivers 10e-h, and the reception unit 21 includes the identification code 13b of the tag data receiver 10b or the identification code 13c of the tag data receiver 10c. When the interrogation radio wave is received, the response radio wave for the interrogation radio wave may not be transmitted.

Claims

A receiving unit that receives an interrogation radio wave including an identification code that is transmitted from the receiving device and identifies the receiving device;
A transmission unit that transmits a response radio wave including the identification code when the interrogation radio wave is received by the reception unit;
A transmission history storage unit for storing the identification code included in the response radio wave transmitted by the transmission unit in the past;
When the receiving unit receives a plurality of interrogation radio waves including the identification code by the receiving unit, the transmission unit stores the identification code included in the interrogation radio wave and the transmission history storage unit. A wireless communication apparatus that transmits only a response radio wave including a specific identification code based on the identification code.
An installation position storage unit that associates and stores the identification code and installation position data of the receiver;
When the interrogation radio wave including the identification code is received by the reception unit, the transmission unit includes the identification code included in the interrogation radio wave and the identification stored in the transmission history storage unit 2. The wireless communication apparatus according to claim 1, wherein whether to transmit the response radio wave is determined based on a code and the installation position data stored in the installation position storage unit.
When the interrogation radio wave including the identification code is received by the reception unit, the transmission unit immediately before the identification code included in the interrogation radio wave is stored in the transmission history storage unit The determination as to whether or not to transmit the response radio wave is made based on the transmitted identification code and the installation position data stored in the installation position storage unit. Wireless communication device.
The receiving unit obtains a reception time of the identification code included in the interrogation radio wave;
The transmission history storage unit further stores a transmission time of the identification code included in the response radio wave transmitted by the transmission unit in the past,
When the interrogation radio wave including the identification code is received by the reception unit, the transmission unit includes the identification code included in the interrogation radio wave, the reception time of the identification code, and the transmission history storage unit Whether or not to transmit the response radio wave based on the identification code transmitted immediately before stored, the transmission time of the identification code, and the installation position data stored in the installation position storage unit The wireless communication device according to claim 3, wherein the wireless communication device is determined.
A wireless communication device according to claim 3;
A first receiving device installed on one side of the management area and identified by a first identification code;
A second receiving device installed on the other side of the management area and identified by a second identification code;
A third receiving device installed on one side of the entrance / exit of the management area and identified by a third identification code;
A fourth receiving device installed on the other side of the entrance / exit of the management area and identified by a fourth identification code;
A management device for controlling an electronic lock provided at the door of the doorway,
The transmitter of the wireless communication device is
The identification code transmitted immediately before stored in the transmission history storage unit is the first identification code or the third identification code, and the reception unit receives the interrogation radio wave including the third identification code. If this is the case, send the response radio wave to the interrogation radio wave including the personal identification code that identifies the owner of the machine,
The identification code transmitted immediately before stored in the transmission history storage unit is the second identification code or the fourth identification code, and the reception unit receives the interrogation radio wave including the third identification code. If you do, do not send a response radio wave to the question radio wave,
The identification code transmitted immediately before stored in the transmission history storage unit is the first identification code or the third identification code, and the reception unit receives the interrogation radio wave including the fourth identification code. If you do, do not send a response radio wave to the question radio wave,
The identification code transmitted immediately before stored in the transmission history storage unit is the second identification code or the fourth identification code, and the reception unit receives the interrogation radio wave including the fourth identification code. If this is the case, send the response radio wave to the interrogation radio wave including the personal identification code that identifies the owner of the machine,
The management device, based on the authentication result of the personal identification code included in the response radio wave transmitted by the wireless communication device and received by the third receiving device or the fourth receiving device, An entrance / exit management system characterized by controlling unlocking or locking of an electronic lock.
A fifth receiving device installed on a floor different from the management area and identified by a fifth identification code;
The transmitting unit of the wireless communication apparatus is configured such that the identification code transmitted immediately before being stored in the transmission history storage unit is the fifth identification code, and the receiving unit is configured to use the third identification code or the first identification code. The entrance / exit management system according to claim 5, wherein when a question radio wave including the identification code of 4 is received, a response radio wave to the question radio wave is not transmitted.