JP2007241594A - In/out determining method and system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an in/out determining method and system reducing the processing load of readers receiving in/out determination information from tags, and that of an in/out management server. <P>SOLUTION: When the tag is located in an area of the first (or fourth) reader, only adjacent identification information and position information transmitted from the reader are recorded in a memory, and its contents are returned to the reader. When the tag enters an area of the second (or third) reader, the adjacent identification information recorded in the memory is referred to, and the adjacent identification information and position information of the reader are overwritten in the memory and returned to the reader. Further, when the tag enters an area of the third (or second) reader, the adjacent identification information recorded in the memory is referred to, and the adjacent identification information and position information of the reader are overwritten in the memory and returned to the reader. Only the third (or second) reader receiving additional record of the memory returned from the tag generates a signal that gives notice of the entrance passage of the tag. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an entry / exit determination method and system, and in particular, transmits and receives data between an RFID tag (hereinafter sometimes simply referred to as a tag) and a tag reader (hereinafter sometimes simply referred to as a reader). The present invention relates to an entry / exit determination method and system for managing entry / exit.

  FIG. 6 shows a system in which tag entry / exit management is performed by an entry / exit management server using a tag and a reader. In particular, FIG. 6 shows a system when entering a room, but the same applies when leaving a room.

  First, the entrance / exit 40 is disposed in the passage PH, and the tag 1 is assumed to advance in the direction of arrow X (from left to right in the figure) through the entrance / exit 40. The first and second readers 2A and 2B are installed on the left side of the entrance / exit 40 in the figure, and the third and fourth readers 2C and 2D are installed on the right side. These readers 2A to 2D give reception areas A to D to the tag 1, respectively, and send data transmission / reception results with the tag 1 to the entry / exit management server 4 via a network (not shown). It is configured as follows.

  In operation, when the tag 1 is an active type equipped with a power source, the tag 1 periodically emits radio waves. Therefore, when the tag 1 moves along the traveling direction X on the passage PH, the reader 2A → Radio waves from tag 1 will be received in the order of 2B → 2C → 2D. Each time the readers 2A to 2D receive radio waves from the tag 1, the readers 2A to 2D transmit data to the entry / exit management server 4 (steps S41 to S44). The entry / exit management server 3 that has received the data from the readers 2A to 2D uses the received data (received data for four times in the illustrated example), and (1) the reception time at each reader when the tag passes through the entrance / exit. Based on the difference and (2) the radio wave intensity received from the tag, it is determined whether the tag 1 is “entering room” or “leaving”, and history management based on these is performed.

  In addition, as shown in FIG. 6, there are cases where a plurality of readers are installed on the left and right sides of the entrance / exit 40, respectively. For this reason, when there are a single reader on the left and right sides of the doorway, the reader may not be able to receive radio waves from the tag. To avoid such a situation, at least two readers are provided on the left and right sides of the doorway.

On the other hand, there is an IC tag, an article management system using the IC tag, an entry / exit management system using the IC tag, and a maintenance system using the IC tag (see, for example, Patent Document 1). Here, in the IC tag, the receiving circuit demodulates the received signal received by the antenna, and inputs this to the CPU and the level detection circuit. The level detection circuit outputs the voltage level of the input reception signal to the CPU. The CPU A / D converts the input analog signal to detect the radio wave intensity, and the CPU reads identification information for uniquely identifying itself from the memory. The CPU includes the detected radio wave intensity data and the read identification information in the read data, and transmits this from the antenna via the transmission circuit. The reader / writer detects the communication state (radio wave intensity, distance, etc.) for each IC tag based on the identification information and radio wave intensity data received from the IC tag.
JP 2005-107792 A

  In the conventional entrance / exit management system using such tags and readers, a plurality of tag readers are installed near the entrance and the entrance / exit determination is performed as described above. Either method (1) or (2) is adopted. Even so, the reader needs to send data to the entry / exit management server each time it receives radio waves from the tag.

  For this reason, a large load is applied to the network between the reader and the entry / exit management server. In addition, since the reader / receiver server receives data every time the reader receives a radio wave transmitted from the tag, a large processing load is required to make an entry / exit determination based on the large amount of received data.

  Accordingly, an object of the present invention is to provide an input / output determination method and system that reduce the processing load on a reader and an input / output management server that receive input / output determination information from a tag.

 [1] In order to achieve the above object, in the entry / exit determination method according to an aspect of the present invention, the tag is located in an area of the first or fourth reader, which is disposed outside the adjacent area of the predetermined point, respectively. At this time, only the adjacent identification information indicating whether or not it is arranged in the adjacent area transmitted from the first or fourth reader and the positional information indicating its own position are recorded in the memory, and the first or fourth The first step of returning to the reader of the first and the adjacent reference information recorded in the memory when the tag enters the area of the second or third reader respectively disposed in the adjacent area. A second step of overwriting the memory with the adjacent identification information and position information of the second or third reader and returning the second or third reader to the second or third reader, and the tag being the third or second reader. When entering each area, the next recorded in the memory A third step of referring to the contact identification information and additionally recording the adjacent identification information and position information of the third or second reader in the memory and returning the information to the third or second reader; and the tag, When entering the area of the fourth or first reader, only the adjacent identification information and position information of the fourth or first reader are recorded in the memory with reference to the adjacent identification information recorded in the memory. Then, only when the fourth step of returning to the fourth or first reader and the additional record of the memory returned from the tag in the third step are received, the third or second reader And a fifth step of generating a signal notifying the passage of the tag at the predetermined point.

  In addition, the entry / exit determination system that realizes the entry / exit determination method is arranged outside the areas of the second and third readers, and the second and third readers, which are respectively arranged in adjacent areas of a predetermined point. A first reader that periodically transmits adjacent identification information indicating whether each is located in the adjacent area and position information indicating its own position, and the first reader When located in the area, record only the adjacent identification information and position information of the first reader in the memory and send it back to the first reader, and when entering the area of the second reader, When the adjacent identification information and position information of the second reader are overwritten in the memory with reference to the recorded adjacent identification information and returned to the second reader, and each enters the area of the third reader Recorded in the memory A tag for referring to the contact identification information and additionally recording the adjacent identification information and position information of the third reader in the memory and returning the information to the third reader, and the third reader includes the tag Only when the additional record adjacent identification information and the position information returned from the memory are received, a signal notifying the passage of the tag through the predetermined point is generated.

  That is, in one aspect of the present invention, similarly to the conventional example shown in FIG. 5, for example, the first and second readers are arranged on the left side of a predetermined point that is an entrance, and the third and fourth readers are arranged on the right side. Each reader transmits adjacent identification information indicating whether or not the reader is located in the adjacent area of the predetermined point and position information indicating its own position.

  In such a state, when the tag is located in the area of the first (or fourth) reader, only the adjacent identification information and the position information transmitted from the first (or fourth) reader are recorded in the memory, The memory contents are returned to the first (or fourth) reader.

  Since the adjacent identification information and position information of the first (or fourth) reader sent from the tag in this way has no additional recording as described later in the memory, this first (or fourth) The reader does not generate a signal notifying that the tag has passed the predetermined point. Therefore, data is not sent from the first (or fourth) reader to the entry / exit management server.

  Thereafter, when the tag enters the area of the second (or third) reader, the tag refers to the adjacent identification information recorded in the memory, and the adjacent identification information of the second (or third) reader and The position information is overwritten in the memory, and the memory contents are returned to the second (or third) reader.

In this case as well, the second (or third) reader that has received the adjacent identification information and position information of the second (or third) reader from the tag has no additional record in the memory, so the tag passes through a predetermined point. No signal is generated.

  Further, when the tag enters the area of the third (or second) reader, the adjacent identification information and position information of the third (or second) reader are obtained by referring to the adjacent identification information recorded in the memory. Record additional information in memory and send back the contents of the memory.

  Therefore, the return data includes the adjacent identification information and position information of the third (or second) reader in addition to the adjacent identification information and position identification information of the second (or third) reader. The third (or second) reader that has received this determines that the additional record in the memory has been received, and generates a signal notifying that the tag has passed the predetermined point.

  When the tag further enters the area of the fourth (or first) reader, the adjacent identification information and position of the fourth (or first) reader is referred to by referring to the adjacent identification information recorded in the memory. Only information is recorded in the memory, and the memory contents are returned.

  Therefore, the fourth (or first) reader that has received this reply from the tag has no additional record in the memory, as in the case of the first (or fourth) reader. The notification signal is not generated as not passing through the point.

  In this way, it is assumed that the tag has passed the predetermined point (entrance / exit) only when the third (or second) reader receives the additional record of the memory returned from the tag in the third step. Since the notification signal is sent to, for example, the entry / exit management server, the amount of data processing in the reader and the entry / exit management server is greatly reduced.

 [2] In the entry / exit determination method according to an aspect of the present invention, the tag is transmitted from the first reader when the tag is located in the area of the first reader arranged outside the adjacent area of the predetermined point. A first step of recording only the adjacent identification information indicating whether or not it is arranged in the adjacent area and the positional information indicating its own position in a memory and returning it to the first reader; and When entering the area of the second reader arranged in the area, the adjacent identification information and position information of the second reader are overwritten in the memory with reference to the adjacent identification information recorded in the memory. A second step of returning to the second reader, and when the tag enters the area of the third reader arranged in the adjacent area, the adjacent identification information recorded in the memory is referred to The adjacent identification information and position information of the third reader are A third step of additionally recording in memory and returning to the third reader, and only when the additional recording of the memory returned from the tag in the third step is received by the third reader. And a fourth step of generating a signal notifying the passage of the predetermined point.

  In this case, the entry / exit determination system includes the second and third readers arranged in adjacent areas of a predetermined point, and the first reader arranged outside the areas of the second and third readers, respectively. Each of which is periodically transmitted with adjacent identification information indicating whether or not each is arranged in the adjacent area and position information indicating its own position, and when located in the area of the first reader, Only the adjacent identification information and position information of the first reader are recorded in the memory and returned to the first reader, and when entering the area of the second reader, the adjacent identification information recorded in the memory is recorded. The adjacent identification information and position information of the second reader are overwritten on the memory, returned to the second reader, and recorded in the memory when entering the area of the third reader, respectively. Refer to the neighbor identification information A tag that additionally records the adjacent identification information and position information of the third reader in the memory and returns the same to the third reader, and the third reader adds the additional record in the memory returned from the tag. Only when the adjacent identification information and the position information are received, a signal notifying the passage of the tag through the predetermined point is generated.

  That is, the entry / exit determination method and system do not require the fourth reader and the fourth step in the above aspect [1]. This corresponds to the fact that the above-mentioned aspect [1] corresponds to the entry and exit of the tag at the same place, while the aspect [2] corresponds to the entry and exit of the tag at a different place. Based on the difference.

  Therefore, the tag that has returned to the third reader in the third step in this mode [2] and entered the room when leaving the room from another location is identified in the first step as in the case of entering the room, in the first step. Only the information and the position information are recorded in the memory and returned to the reader in the third step to leave the room.

  As a result, the data processing amount of the reader and the input / output management server connected to the reader can be reduced, and the number of readers can be reduced at each of the entrance and the exit, so that there is enough space.

  The tag can return the memory contents only when the memory is rewritten or periodically.

  According to the present invention, the reader transmits only data necessary for the entry / exit determination to the entry / exit management server and the like, and the network load between the reader and the entry / exit management server can be greatly reduced as compared with the conventional case. In addition, since the entry / exit information can be determined only by checking the entry / exit determination information of the received data in the entry / exit management server or the like, unnecessary determination processing can be omitted. When four readers are used, the data processing amount is reduced to about one-fourth as compared with the prior art.

  Furthermore, when the entrance and the exit are separated, the number of readers installed in each can be reduced.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

Common configuration example: Figure 1
FIG. 1 shows an entry / exit determination system that implements an entry / exit determination method according to an aspect of the present invention, and is common to the following Examples [1] and [2]. This system includes a tag 1, a reader 2, an entry / exit management server 3, and a personal computer (hereinafter abbreviated as “PC”) 4. In addition, the reader 2 includes an antenna 20 and is connected to the tag 1 by radio R and connected to the reader 2 by a coaxial cable C. In this case, only one reader 2 is shown, but four readers 2 are provided as will be described later.

  Tag 1 is built-in based on the data receiving unit 11 connected to the antenna 20 by wireless R, the data analyzing unit 12 for analyzing the data received by the data receiving unit 11, and the result analyzed by the data analyzing unit 12. The built-in memory rewriting unit 13 that rewrites the memory 14, the data transmission unit 15 that transmits the contents of the built-in memory 14, and the data transmission unit 15 that is activated by an instruction from the built-in memory rewriting unit 13 and the contents of the built-in memory 14 And a data transmission request unit 16 for transmitting the data.

  The reader 2 also includes a data receiving unit 21 connected to the coaxial cable C, a data analyzing unit 22 that analyzes the data received by the data receiving unit 21, and whether or not transmission is possible based on the data analysis result by the data analyzing unit 22. A transmission determination unit 23 that performs the above determination, a data transmission unit 24 that transmits data to the entry / exit management server 3 via a LAN based on the transmission determination result of the transmission determination unit 23, and a Web server connected to the PC 4 via a LAN 25, a definition information storage unit 26 that stores the definition information included in the data received by the Web server 25, and a data transmission unit 27 that periodically transmits the storage contents of the definition information storage unit 26. Yes.

Example [1]: Fig. 2 to Fig. 4 (when the doorway is in the same place)
In this embodiment, as shown in FIGS. 2 to 4, on the left and right sides of the entrance / exit 40, similarly to the conventional example shown in FIG. 6, the first and second readers 2A and 2B and the third and fourth readers are provided. Readers 2C and 2D are arranged.

  The operation of this embodiment will be described below with reference to FIGS.

Example of operation when entering the room: Fig. 2 (1) and Fig. 3
First, the readers 2A to 2D (hereinafter may be collectively referred to as reference numeral “2”) are configured such that the data transmission unit 27 performs “input / output flag” and “position information” stored in the definition information storage unit 26 and others. The information “IP address, port number, etc.” is periodically transmitted from the antenna 20 as shown in FIG.

  This “entry / exit flag” is based on adjacent identification information indicating whether or not the reader 2 is placed in an area adjacent to the entrance 40 (when placed in an area = ON / when not placed in an adjacent area = OFF). In the case of the system shown in FIG. 2 (1), the readers 2B and 2C (the second and third readers) are “input / output flag = ON”, and the other readers 2A and 2D (first and second readers) (4th reader) is set to “in / out flag = OFF”. The “position information” is a value “A” to “D” indicating the installation location of each reader 2.

The radio wave transmitted from the reader 2A through the antenna 20 is received by the data receiving unit 11 in the tag 1 (step S1 in FIGS. 2 (1) and 3), and the data analysis unit 12 displays “in / out flag” in the received data. ”And“ position information ”(FIG. 1 (2)), the built-in memory rewriting unit 13 rewrites the built-in memory 14 based on the data analysis result ((3) in FIG. 1). The conditions for rewriting the internal memory 14 follow the following rules.
Rule 1: When data with “input / output flag = ON” is received, if there is no data with “input / output flag = OFF” in the built-in memory 14, one piece of received data is added (using 2 bytes).
Rule 2: When data with “input / output flag = ON” is received, if data with “input / output flag = OFF” exists in the built-in memory 14, the data is overwritten (use 1 byte).
・ Rule 3: When “I / O flag = OFF” data is received, the contents of the built-in memory 14 are once deleted, and one new received data is written (use 1 byte).

(1) Passing the area of the reader 2A Under the above conditions, in the case of the tag 1 that has entered the area A of the reader 2A arranged outside the area adjacent to the entrance / exit 40, it is transmitted from the reader 2A. In the data to be included, “input / output flag = OFF” and “position information = A” are included (step S1 in the same), so according to the above rule 3, the contents of the internal memory 14 are deleted and a new “ Write one entry (one byte) of “I / O flag = OFF” and “Position information = A” (step S2 in the same). Although the built-in memory 14 also stores a tag ID, it is not deleted.

  Thereafter, in the tag 1, the data transmission unit 15 transmits the “input / output flag = OFF” and “position information = A” recorded in the built-in memory 14 to the reader A (step S3). . In this case, the data transmission unit 15 periodically transmits the contents of the built-in memory 14 (FIG. 1 (4)), or the built-in memory rewrite unit 13 sends a transmission request from the data transmission request unit 16 when the memory is rewritten. Either transmission is performed only when

  The reader 2A that has received the contents of the internal memory 14 from the tag 1 sends the memory contents from the data receiving unit 21 to the data analyzing unit 22. The data analysis unit 22 extracts “entry / exit flag = OFF” and “position information = A” in the memory contents and sends them to the transmission determination unit 23. Receiving this, the transmission determination unit 23 knows that the content of the internal memory 14 has only one (1 byte) data and no two (2 bytes) data. It is determined that there is no person who has not passed through, and no entry information is transmitted to the entry / exit management server 3 (step S4).

(2) Passing through the area of the reader 2B After this, when the tag 1 enters the area B of the reader 2B arranged in the area adjacent to the entrance / exit 40 from the area A of the reader 2A, the reader 2B receives the same as the reader 2A described above Then, the data is sent and received by the tag 1 (step S5). In this case, the received data includes “input / output flag = ON” and “position information = B”.

  Therefore, the data analyzed by the data analysis unit 12 in the tag 1 and sent to the built-in memory rewriting unit 13 are transferred to the built-in memory 14 according to the above-mentioned rule 2, with “input / output flag = ON” and “position information = B”. Is overwritten. Accordingly, the “entry / exit flag = OFF” and “position information = A” recorded in step S2 are deleted (step S6).

  Thereafter, the tag 1 transmits the contents of the built-in memory 14 from the data transmission unit 15 to the reader 2B as in step S3 (step S7).

  In the reader 2B that has received the data in the built-in memory 14 from the tag 1, the received data is extracted by the data analyzing unit 22 from the data receiving unit 21, and as a result, the information recorded in the built-in memory 14 is “input / output flag = “ON” and “position information = B”. Receiving this, the transmission determination unit 23 also contains only one case of data in the built-in memory 14, so the tag 1 does not pass through the entrance 40, and data transmission indicating entry of the tag 1 is unnecessary. Judgment is made (step S8).

(3) When the area passing tag 1 of the reader 2C enters the area C of the reader 2C, which is also arranged in the adjacent area of the entrance 40, the tag 1 receives the data received by the data receiving unit 11 as “input / output flag = ON ”And“ position information = C ”(step S9), the internal memory rewrite unit 13 that has received the received data from the data analysis unit 12 sets“ input / output flag = ON ”according to the above rule 1. Data consisting of “position information = C” is added to the built-in memory 14. Therefore, the built-in memory 14 at this time has two cases (2 bytes) of “input / output flag = ON” and “position information = B” and “input / output flag = ON” and “position information = C” as shown in the figure. Will be recorded.

  Since the contents of the built-in memory 14 are transmitted from the data transmitting unit 15 to the reader 2C (step S11), the reader 2C uses the contents of the built-in memory 14 as the data receiving unit 21 and the data analyzing unit. Determination is made by the transmission determination unit 23 via 22. As a result, since there are two entry / exit determination data in the built-in memory 14, the transmission determination unit 23 of the reader 2C determines that the tag 1 has passed through the entrance 40 (there is a room occupant) and transmits data. The “room entry information” is transmitted from the section 24 to the entrance / exit management server 3 (steps S12 and S13).

  As a result, the entrance / exit management server 3 records “room entry information” in a database (not shown) (step S14).

  After being recorded in the database in this way, the entry / exit management server 3 responds to the reader 2D as to whether or not the recording has been performed normally (step S15 in FIG. 3). This response is not directly relevant to the present invention.

(4) When the area passing tag 1 of the reader 2D enters the area D of the reader 2D arranged outside the adjacent area of the entrance / exit 40, the tag 1 is determined from “entry / exit flag = OFF” and “position information = D”. Is received (step S16). The built-in memory rewriting unit 13 that has received this received data via the data receiving unit 11 and the data analyzing unit 12 is built-in as in the case where the tag 1 enters the area A of the reader 2A according to the above rule 3. After the contents of the memory 14 are once deleted, “input / output flag = OFF” and “position information = D” in the received data are recorded (step S17), and the contents are transmitted to the reader 2D (step S18). ).

  The reader 2D that has received this data knows that only one case of data is recorded in the built-in memory 14 as in the case of the reader 2A. However, data transmission to the entry / exit management server 3 is not performed (step S19).

  After the reader 2C transmits “room entry information” to the entry / exit management server 3, the reader 2D deletes the memory contents and records the new data “entry / exit flag = OFF” and “position information = D”. This is to prevent erroneous determination that two data are recorded in the built-in memory 14 when leaving the room, which will be described later.

  In this way, in the operation at the time of entering the room, “entrance information” is transmitted only from the reader 2C to the entry / exit management server 3, and the amount of data is about 4 minutes compared to the conventional example shown in FIG. It is shown to be reduced to 1 of.

Operation when leaving the room: Fig. 2 (2) and Fig. 4
The system configuration example in this case is exactly the same as when entering the room, but if the tag 1 enters from the direction of travel Y (from right to left in the figure), it is shown in FIGS. 2 (1) and 3 The readers 2A and 2D (first and fourth readers) correspond to the readers 2D and 2A shown in FIGS. 2 (2) and 4, respectively, and similarly, the reader 2B in FIGS. 2 (1) and 3 And 2C (second and third readers) correspond to the readers 2C and 2B shown in FIG. 2 (2) and FIG. Accordingly, the steps S1 to S9 when entering the room in FIGS. 2 (1) and 3 correspond to the steps S21 to S39 when leaving the room shown in FIG. 2 (2) and FIG.

  That is, the tag 1 that has entered from the entrance / exit 40 by the entrance operation of FIG. 2 (1) enters the room with the “entry / exit flag = OFF” and “position information = D” recorded in the built-in memory 14. Therefore, if the tag 1 tries to leave the room along the traveling direction Y in this state, in the area D of the reader 2D, the data including “entrance / exit flag = OFF” and “position information = D” is overwritten. It becomes. This indicates that overwriting is performed with exactly the same data.

  This is to prevent the contents in the built-in memory 4 of the tag 1 to leave the room from being changed, but regarding the room leaving operation, the reader 2D in this case may not be installed.

  However, in this embodiment, the entrances and exits are the same place, and naturally, the readers 2A to 2D are used as they are. It becomes.

Example [2]: Fig. 5 (when entrances are in different locations)
Unlike the above embodiment [1], if the entrance and exit are separate and entrance / exit management is performed, the fourth reader 2D and steps S16 to S19 and S36 to S39 shown in FIGS. 2 to 4 are not necessary, Only the readers 2A to 2C need be installed at the entrance and the exit, respectively.

  That is, when entering the room from the entrance 50, as shown in FIG. 5 (1), when passing through the area C, the built-in memory 14 has “entrance / exit flag = ON”, “position information B” and “entrance / exit flag = Two cases of “ON” and “Location information C” are still recorded.

  Thereafter, when leaving the other exit 51, only the leaders 2A to 2C are installed at the exit 51, as shown in FIG. In area A, the built-in memory 14 records only one entry of “entry / exit flag = OFF” and “position information A”, and thereafter, the operation is the same as the operation when entering the room in FIG. Then, when passing the area C of the reader 2C, as in the case of entering the room, the built-in memory 14 stores “entrance / exit flag = ON” and “position information B” and “entrance / exit flag = ON” and “position information C”. Records remain recorded.

  In this way, the room entry operation and the room exit operation are performed, and entry / exit management is realized by the entry / exit management server 3.

It should be noted that the present invention is not limited to the above-described embodiments, and it is obvious that various modifications can be made by those skilled in the art based on the description of the scope of claims.

(Appendix 1)
Whether the tag is placed in the adjacent area transmitted from the first or fourth reader when the tag is located in the area of the first or fourth reader arranged outside the adjacent area of the predetermined point, respectively A first step of recording only the adjacent identification information indicating the position information and the position information indicating its own position in a memory and returning it to the first or fourth reader;
When the tag enters the area of the second or third reader respectively arranged in the adjacent area, the tag of the second or third reader is referred to with reference to the adjacent identification information recorded in the memory. A second step of overwriting the memory with adjacent identification information and position information and returning it to the second or third reader;
When the tag enters the area of the third or second reader, the adjacent identification information and position information of the third or second reader are referred to the adjacent identification information recorded in the memory. A third step of additionally recording and replying to the third or second reader;
When the tag enters the area of the fourth or first reader, only the adjacent identification information and position information of the fourth or first reader are obtained by referring to the adjacent identification information recorded in the memory. A fourth step of recording in the memory and returning to the fourth or first reader;
A fifth step in which the third or second reader generates a signal notifying that the tag has passed through the predetermined point only when an additional record of the memory returned from the tag in the third step is received;
An entry / exit determination method characterized by comprising:
(Appendix 2)
The second and third readers arranged in adjacent areas of a predetermined point, respectively, and at least the first and fourth readers arranged outside the areas of the second and third readers, respectively, Regularly transmitting adjacent identification information indicating whether or not is located in the adjacent area and position information indicating its own position,
When located in the area of the first or fourth reader, only the adjacent identification information and position information of the first or fourth reader is recorded in the memory and returned to the first or fourth reader, When entering the area of the second or third reader, the adjacent identification information and the position information of the second or third reader are overwritten in the memory with reference to the adjacent identification information recorded in the memory. When returning to the second or third reader and entering the area of the third or second reader, the adjacent identification information recorded in the memory is referred to and the third or second reader Adjacent identification information and position information are additionally recorded in the memory and sent back to the third or second reader, and the adjacency recorded in the memory when entering the area of the fourth or first reader, respectively. Adjacent identification information and position information of the fourth or first reader with reference to identification information A tag that records only in the memory and returns to the fourth or first reader;
And the third or second reader generates a signal notifying the passage of the tag through the predetermined point only when receiving the additional record adjacent identification information and the position information of the memory returned from the tag. An entry / exit judgment system characterized by that.
(Appendix 3)
When the tag is located in the area of the first reader arranged outside the adjacent area at the predetermined point, the adjacent identification information indicating whether or not the tag is arranged in the adjacent area transmitted from the first reader; A first step of recording only the position information indicating its own position in a memory and returning it to the first reader;
When the tag enters the area of the second reader arranged in the adjacent area, the adjacent identification information and position information of the second reader are obtained by referring to the adjacent identification information recorded in the memory. A second step of overwriting the memory and returning to the second reader;
When the tag enters each area of the third reader arranged in the adjacent area, the adjacent identification information and position information of the third reader are obtained by referring to the adjacent identification information recorded in the memory. A third step of additionally recording in the memory and returning to the third reader;
A fourth step of generating a signal notifying that the third reader has passed the predetermined point only when the additional record of the memory returned from the tag is received in the third step;
An entry / exit determination method characterized by comprising:
(Appendix 4)
The second and third readers arranged in adjacent areas of a predetermined point, and the first reader arranged outside the areas of the second and third readers, respectively, each of the adjacent areas Periodically transmitting the adjacent identification information indicating whether or not is arranged and the position information indicating its own position,
When located in the area of the first reader, only the adjacent identification information and position information of the first reader are recorded in the memory, returned to the first reader, and respectively entered into the area of the second reader Then, referring to the adjacent identification information recorded in the memory, the adjacent identification information and position information of the second reader are overwritten in the memory and returned to the second reader, and the third reader's A tag that, when entering each area, refers to the adjacent identification information recorded in the memory and additionally records the adjacent identification information and position information of the third reader in the memory and returns it to the third reader; ,
The third reader generates a signal notifying the passage of the tag through the predetermined point only when receiving the additional record adjacent identification information and the position information of the memory returned from the tag. The entrance / exit judgment system.
(Appendix 5) In Appendix 1 or 3,
The entry / exit determination method, wherein the reply by the tag in the first to fourth steps is performed only when the memory is rewritten.
(Appendix 6) In Appendix 1 or 3,
The entry / exit determination method, characterized in that the reply by the tag in the first to fourth steps is periodically performed.
(Appendix 7) In Appendix 2 or 4,
The entry / exit determination system, wherein the tag returns the contents of the memory only when the memory is rewritten.
(Appendix 8) In Appendix 2 or 4,
The entry / exit determination method system, wherein the tag periodically returns the contents of the memory.

It is the block diagram which showed the system which implement | achieves the entrance / exit determination method which concerns on 1 aspect of this invention. It is the figure which showed the operation | movement of the entrance / exit determination method and system which concern on Example [1] of this invention separately at the time of entrance and leaving. FIG. 3 is a sequence diagram showing an operation example when entering the room shown in FIG. 2 (1). FIG. 3 is a sequence diagram showing an operation when leaving the room shown in FIG. 2 (2). It is the figure which showed operation | movement of the entrance / exit determination method and system which concern on Example [2] of this invention separately at the time of entrance and leaving. It is the block diagram which showed the operation | movement at the time of entering the entrance / exit determination method and system by a prior art.

Explanation of symbols

1 RFID tag (tag)
2, 2A-2D tag reader (reader)
3 Entrance / exit management server
4 PC
11 Data receiver
12 Data analysis section
13 Internal memory rewrite section
14 Internal memory
15 Data transmitter
16 Data transmission request part
20 Antenna
21 Data receiver
22 Data analysis section
23 Transmission judgment part
24 Data transmitter
25 Web server
26 Definition information storage
27 Data transmitter In the figure, the same reference numerals indicate the same or corresponding parts.

Claims (5)

Whether the tag is placed in the adjacent area transmitted from the first or fourth reader when the tag is located in the area of the first or fourth reader arranged outside the adjacent area of the predetermined point, respectively A first step of recording only the adjacent identification information indicating the position information and the position information indicating its own position in a memory and returning it to the first or fourth reader;
When the tag enters the area of the second or third reader respectively arranged in the adjacent area, the tag of the second or third reader is referred to with reference to the adjacent identification information recorded in the memory. A second step of overwriting the memory with adjacent identification information and position information and returning it to the second or third reader;
When the tag enters the area of the third or second reader, the adjacent identification information and position information of the third or second reader are referred to the adjacent identification information recorded in the memory. A third step of additionally recording and replying to the third or second reader;
When the tag enters the area of the fourth or first reader, only the adjacent identification information and position information of the fourth or first reader are obtained by referring to the adjacent identification information recorded in the memory. A fourth step of recording in the memory and returning to the fourth or first reader;
A fifth step in which the third or second reader generates a signal notifying that the tag has passed through the predetermined point only when an additional record of the memory returned from the tag in the third step is received;
An entry / exit determination method characterized by comprising: The second and third readers arranged in adjacent areas of a predetermined point, respectively, and at least the first and fourth readers arranged outside the areas of the second and third readers, respectively, Regularly transmitting adjacent identification information indicating whether or not is located in the adjacent area and position information indicating its own position,
When located in the area of the first or fourth reader, only the adjacent identification information and position information of the first or fourth reader is recorded in the memory and returned to the first or fourth reader, When entering the area of the second or third reader, the adjacent identification information and the position information of the second or third reader are overwritten in the memory with reference to the adjacent identification information recorded in the memory. When returning to the second or third reader and entering the area of the third or second reader, the adjacent identification information recorded in the memory is referred to and the third or second reader Adjacent identification information and position information are additionally recorded in the memory and sent back to the third or second reader, and the adjacency recorded in the memory when entering the area of the fourth or first reader, respectively. Adjacent identification information and position information of the fourth or first reader with reference to identification information A tag that records only in the memory and returns to the fourth or first reader;
And the third or second reader generates a signal notifying the passage of the tag through the predetermined point only when receiving the additional record adjacent identification information and the position information of the memory returned from the tag. An entry / exit judgment system characterized by that. When the tag is located in the area of the first reader arranged outside the adjacent area at the predetermined point, the adjacent identification information indicating whether or not the tag is arranged in the adjacent area transmitted from the first reader; A first step of recording only the position information indicating its own position in a memory and returning it to the first reader;
When the tag enters the area of the second reader arranged in the adjacent area, the adjacent identification information and position information of the second reader are obtained by referring to the adjacent identification information recorded in the memory. A second step of overwriting the memory and returning to the second reader;
When the tag enters each area of the third reader arranged in the adjacent area, the adjacent identification information and position information of the third reader are obtained by referring to the adjacent identification information recorded in the memory. A third step of additionally recording in the memory and returning to the third reader;
A fourth step of generating a signal notifying that the third reader has passed the predetermined point only when the additional record of the memory returned from the tag is received in the third step;
An entry / exit determination method characterized by comprising: The second and third readers arranged in adjacent areas of a predetermined point, and the first reader arranged outside the areas of the second and third readers, respectively, each of the adjacent areas Periodically transmitting the adjacent identification information indicating whether or not is arranged and the position information indicating its own position,
When located in the area of the first reader, only the adjacent identification information and position information of the first reader are recorded in the memory, returned to the first reader, and respectively entered into the area of the second reader Then, referring to the adjacent identification information recorded in the memory, the adjacent identification information and position information of the second reader are overwritten in the memory and returned to the second reader, and the third reader's A tag that, when entering each area, refers to the adjacent identification information recorded in the memory and additionally records the adjacent identification information and position information of the third reader in the memory and returns it to the third reader; ,
The third reader generates a signal notifying the passage of the tag through the predetermined point only when receiving the additional record adjacent identification information and the position information of the memory returned from the tag. The entrance / exit judgment system. In claim 1 or 3,
The entry / exit determination method, wherein the reply by the tag in the first to fourth steps is performed only when the memory is rewritten.

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