JP2012047572A - Member position management system and member position management method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily manage the position of a certain member (specific member) by utilizing positional information of any other member positioned around the specific member and different from the specific member when specifying the position of the specific member.SOLUTION: A member position management system 1 includes: an RFID tag 3 in which a member ID is recorded; a tag reader 4; a positional information database 5; and positioning means 6 for positioning a member 2 using the positional information database 5. The tag reader 4 is configured to acquire member IDs of a specific member 2a that is a member 2 to specify the position thereof, and of another member 2b positioned around the specific member 2a and different from the specific member 2a at the same time or at different times. The positioning means 6 determines positional information of the another member 2b on the basis of the member ID of the another member 2b acquired by the tag reader 4 and the positional information database 5 and applies the determined positional information of the another member 2b as positional information of the specific member 2a.

Description

  The present invention relates to a member position management system and a member position management method for managing the positions of a plurality of members arranged in an area.

Conventionally, as a method of managing the position of an article (member) in a factory or warehouse, there is a technique of managing the position of a member by attaching an identification tag of an RFID tag and reading it with a reader device. .
For example, a “position tag” or the like is attached to each position management unit such as a shelf on which a member is placed, and a “member tag” is attached to a member, and these “member tag” and “position tag” are connected to a reader. There is a technique of managing the position of a member by simultaneously reading with an apparatus. A technique for estimating the position of a member by reading a plurality of “position tags” at the same time has been developed.

  In the article search system and the article search program disclosed in Patent Document 1, a large number of “position tags” indicating position information are set in an area, and the signal is detected simultaneously with a member while changing the signal output by a stationary reader device. "Position tag" is detected. The article position is estimated using information such as the relationship between the change in the signal output and the detected increase / decrease of the “position tag” and whether or not the “position tag” is redundantly detected by the reader devices at different locations.

JP 2007-85826 A

However, the technique of Patent Document 1 is based on the premise that an article is surely present (placed) in the place indicated by the position tag, and the article position is estimated based on this premise.
However, in an actual site, due to various circumstances, the place where an article is actually placed is often different from the place indicated by the position tag associated with the article. For example, there is a situation in which a certain article is moved from the original storage location to another storage location outside the range of the location tag of the storage location, and is not re-moved thereafter, for the purpose of carrying in the luggage. In this case, the item is not placed in the place indicated by the position tag.

The technique of Patent Document 1 described above cannot cope with such a situation, and it is difficult to say that it is a flexible and versatile technique that can be applied to actual sites.
In addition, regarding the member tag attached to the article (member), some information, for example, storage location information (position information) may not be input due to various causes. When placed in a storage location, it becomes unclear whether the article should be placed in the storage location, and there arises a problem that location management cannot be performed.

  This invention is made in view of such a situation, and provides the position management system of the member which can perform position management of the specific member which is a member which pinpoints a position reliably, and the position management method of a member. With the goal.

In order to achieve the above-described object, the present invention takes the following technical means.
The technical means of the present invention is a position management system for managing positions of a plurality of members arranged in an area, a member tag provided in each member and storing member identification information of each member therein, and the member A tag reader capable of reading the member identification information in the tag; a position information database for storing the member identification information of each member in association with the position information of each member in the area; and a member information using the position information database. A position determining means for determining a position, and the tag reader is configured to identify member identification information of a specific member that is a member whose position is to be specified, and other than the specific member that is positioned around the specific member. The member identification information of the other member is configured to be acquired at the same time or different time, and the position determination unit is configured to acquire the member identification information and the position of the other member acquired by the tag reader. Obtain the position information of the other members on the basis of the distribution database, the positional information of the other members obtained lies in that the location information of the specific member.

  The position determination means includes a position information calculation unit that obtains position information of another member from member identification information of another member stored in the position information database, and a position of the other member obtained by the position information calculation unit. In order to make the information position information of the specific member, it is preferable to include a position information determination unit that associates position information of another member with member identification information of the specific member acquired by a tag reader.

The position information determination unit preferably uses the obtained mode value related to the position information of the other member as the position information of the specific member.
Here, the mode value relating to the obtained position information of the other member is the largest one among the position information of the other members present when there are a plurality of obtained position information of the other members (mode value). ).

  One or a plurality of places are set in the area, and a place tag for storing place identification information indicating each place is installed in the place, and the tag reader includes place identification information in the position tag. It is preferable that the position information determination unit uses the place identification information read by the tag reader as the position information of the specific member instead of the obtained position information of the other member.

The position determination means includes a correction unit that corrects position information of members in the position information database, the correction unit obtains a mode value related to position information in the position information database, and the mode value When the number of other pieces of position information excluding is less than or equal to a predetermined value, it is preferable to correct position information whose number is less than or equal to the predetermined value to the mode value.
Another technical means of the present invention is a position management method for managing the positions of a plurality of members arranged in an area, a member tag provided in each member and storing member identification information of each member therein, A tag reader capable of reading the member identification information in the member tag, and a position information database for storing the member identification information of each member in association with the position information of each member in the area; The tag reader acquires the member identification information of the specific member that is the member whose position is to be specified and the member identification information of another member that is located around the specific member and is different from the specific member at the same time or at different times. Further, the position information of the other member is obtained based on the member identification information of the other member obtained by the tag reader and the position information database, and the obtained position information of the other member is It lies in the position information of a particular member.

It is preferable that the mode value regarding the obtained position information of the other member is the position information of the specific member.
When one or a plurality of places are set in the area, and the place tag storing the place identification information indicating each place is installed in the place, the place identification information in the position tag is set by the tag reader. It is preferable that the place identification information read by the tag reader is used as the position information of the specific member instead of the obtained position information of the other member.

  When correcting the position information of the member in the position information database, the mode value related to the position information is obtained in the position information database, and the number of other position information excluding the mode value is equal to or less than a predetermined value. It is preferable that position information whose number is equal to or less than a predetermined value is corrected to the mode value.

  ADVANTAGE OF THE INVENTION According to this invention, the position management of the specific member which is a member which pinpoints a position can be performed reliably, for example, the input mistake of member position information by an operator etc. can be prevented.

It is the figure which showed the outline of the position management system. It is the figure which showed the information of the position information database. It is the figure which showed the detail of the position management system in 1st Embodiment. It is the figure which showed the information of the position information database in 1st Embodiment. It is the figure which showed the detail of the position management system in 2nd Embodiment. It is the figure which showed the information of the position information database in 2nd Embodiment. It is the figure which showed the detail of the position management system in 3rd Embodiment. It is the figure which showed the information of the position information database in 3rd Embodiment. It is the figure which showed the detail of the position management system in 4th Embodiment. It is the figure which showed the information of the position information database in 4th Embodiment. It is the figure which showed the flowchart in the case of actually investigating a member.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
The position management system of the present invention manages the position of a member (article) placed outdoors, in a factory, in a warehouse, or the like. FIG. 1 shows an overall view of a position management system when a member is placed in an area such as outdoors, in a factory, or in a warehouse.

As shown in FIG. 1, in the position management system, an area E is divided into three areas, for example, a place A, a place B, and a place C, in order to place the member 2 outdoors, in a factory, and in a warehouse. A plurality of members 2 are placed in each place. That is, each place is set in the area E, and the member 2 is placed in each place.
In addition, what kind of member 2 is placed in each of the places A, B, and C is determined by various circumstances such as the type and size of the member 2 and the delivery date of the member 2. In this embodiment, the number of places is three (places A to C). However, as a matter of course, the number is not limited to three.

The position management system 1 reads (acquires) the member identification information in the member tag 3a attached to the member 2 placed at each place by the tag reader 4 and acquires the member identification information and the position information database 5 acquired by the tag reader 4. The position information of the member 2 is grasped from the position information of the member 2 and the like stored in the information, and various information in the position information database 5 is updated.
Since the member identification information stored in the member tag 3a is configured by an ID number consisting of numerals such as [0001], “member identification information” will be expressed as “member ID” hereinafter.

First, the detailed configuration of the location management system 1 will be described in order.
The position management system 1 includes a member tag 3 a, a tag reader 4, a position information database 5, and a position determination unit 6.
The member tag 3a is attached to each member 2 and has a member ID recorded therein. The member tag 3a is constituted by, for example, an RFID tag 3 (Radio Frequency Identification Tag). The RFID tag 3 includes an IC chip and an antenna, and information written in the IC chip can be read or rewritten from the outside in a non-contact manner.

  The tag reader 4 is a portable type for reading the member ID of the member tag 3a and easy to carry. The tag reader 4 reads a member ID in the member tag 3a by transmitting a radio wave (UHF wave) toward the member tag 3a and receiving a radio wave from the member tag 3a in response to the transmitted radio wave. (Passive RFID tag). Further, the tag reader 4 can transmit the received member ID to the position information database 5 via a communication means 7 such as a radio.

On the other hand, each of the places A, B, and C is provided with a display pole indicating the name of the place, and a position tag 3b is attached to the display pole. This position tag 3b is also composed of the RFID tag 3, and the tag reader 4 can read placement identification information which is information recorded therein.
Since the placement identification information stored in the position tag 3b is composed of a numerical ID number such as [10001], the “placement identification information” is hereinafter expressed as “placement ID”.

As shown in FIG. 2, the position information database 5 is for storing a member ID and information associated with the member ID, and is configured in a hard disk drive (HDD).
Specifically, the position information database 5 stores the member ID of the member tag 3a and the position information (placement position) associated with the member ID, the place ID of the position tag 3b, and the place information. The position information (location position) indicated by the ID is stored.

  In the position information database 5 shown in FIG. 2, since the member ID of the member tag 3a and the position information are stored in association with each other, if the member ID of the member tag 3a is known, the location of the member 2 of this member ID is stored. Can be extracted. For example, as shown in FIG. 2, it can be seen that the member 2 with the member ID [0003] is placed in the place A by the position information, and the member 2 with the member ID [0005] is based on the position information. It can be seen that it is placed in Yard C.

Further, in the position information database 5, the place ID of the position tag 3b and the position information are stored in association with each other. Therefore, if the place ID of the position tag 3b is known, information indicating the place of the position tag 3b is extracted. be able to. For example, it can be seen that the position tag 3b whose place ID is [1001] indicates the place A by the position information.
The position determining means 6 is for determining the position of the member 2 using the member ID acquired by the tag reader 4 and the position information database 5, and is constituted by, for example, a program built in the tag reader 4 and wirelessly. The information in the position information database 5 can be read or rewritten via the communication means 7 such as.

First, a method for the operator to grasp (determine) the position of the specific member 2 a will be described together with the position determining means 6.
FIG. 3 shows a state where the worker is investigating the member 2 placed in the place A with the tag reader 4 in order to grasp the position of the member 2.
In order to determine (specify) the position of the member 2, first, the operator holds the tag reader 4, heads for the placement A, and enters the member ID (member ID [0005]) of the particular member 2 a placed in the placement A. get. At this time, since the radio wave of the tag reader 4 propagates to the surroundings, the member IDs (for example, member IDs [0004] and [0006] to 0009]) of the plurality of adjacent members 2b around the specific member 2a are almost simultaneously set. get.

Then, the tag reader 4 accesses the position information database 5 via the communication means 7 such as wireless, and the position information of the acquired member ID (six member IDs in the case of FIG. 3) is obtained from the position information database 5. get.
As shown in FIG. 4, in the position information database 5, for the members 2 with member IDs [0004] and member IDs [0006] to [0009], the association between the member IDs and the position information has already been completed. Assuming that the information is stored, since the position information of the members 2 of these member IDs [0004] and member IDs [0006] to [0009] are all in the place A, four of the obtained five member IDs It can be determined that the member 2 corresponding to the member ID is placed in the storage area A.

Here, regarding the member 2 having the member ID [0005], the member ID is not associated with the position information, and the position information for the member ID [0005] does not exist when the member ID is acquired.
Since the position information does not exist in the position information database 5 for the member 2 with the member ID [0005], the position determination means 6 newly places the member 2 with the member ID [0005] in the placement area A. It is determined that it has been updated (to be updated).

  Then, the position determining means 6 uses the member ID [0005] and the position information (place A) of the member 2 of the member IDs [0006] to [0009] acquired at the same time as the member ID [0005] as the member ID [0005]. [0005] is the same as the position information of [0005], the member ID [0005] is associated with the position information (place A), and the information of the place A is written in the position information corresponding to the member ID [0005].

As described above, the position determination unit 6 operates, but more specifically, includes a position information calculation unit 10 and a position information determination unit 11.
The position information calculation unit 10 obtains position information of the other member 2b from the member ID of the other member 2b stored in the position information database 5. In the example of FIG. 3, all the positional information associated with the member IDs of the other members 2b indicates the placement A. Therefore, the positional information calculation unit 10 sets the positional information of the other members 2b as “placement A”. To do.

  The position information determination unit 11 associates the position information of the other member 2 b obtained by the position information calculation unit 10 with the member ID of the specific member 2 a acquired by the tag reader 4. In the example of FIG. 3, since the position information of the other member 2b is “place A”, the position information is associated with the place A that is the position information and the member ID ([0005]) of the specific member 2a. The member ID and position information of the specific member 2a are stored in the database 5.

  According to the present invention, since the specific member 2a is likely to be placed in the same place as the other member 2b, the peripheral member 2b (other members) is detected by the RFID tag 3 having a detection distance of about several meters. The member ID of the member) is detected, and the position of the peripheral member 2b obtained from the member ID is set as the position of the newly placed member 2a (specific member). That is, when determining the position information of the specific member 2a, the member ID of the specific member 2a and the member ID of another member 2b that is located around the specific member 2a and is different from the specific member 2a are simultaneously acquired. Further, based on the member ID of the other member 2b acquired by the tag reader 4 and the position information database 5, the position information of the other member 2b is obtained, and the obtained position information of the other member 2b is obtained by the tag reader 4. The ID is applied as position information of the specific member 2a that has acquired the ID.

That is, since the position of the newly placed member 2 (specific member 2a) is set using the position of another member 2b that has already been placed, the registration work of the position information of the specific member 2a is easily performed. be able to.
[Second Embodiment]
In the first embodiment, the specific member 2a and the other member 2b are described as an example where they are placed in the same place (place A). In the second embodiment, for example, the specific member 2a The case where it is placed near the boundary between adjacent places will be described.

FIG. 5 shows a state where the worker is investigating the member 2 placed in the placement A or the placement B with the tag reader 4 in order to grasp the position of the member 2. In the following description, it is assumed that the member 2 (specific member 2a) having the member ID [0005] is newly placed in the placement A, and the other members 2b are already placed in the placement A and the placement B.
For example, when the worker is near the boundary between the storage place A and the storage place B, the member IDs (eg, [0004], [0005], and [0007] of the plurality of members 2 placed on the storage place A by the tag reader 4). ~ [0009]) is arbitrarily acquired, and further, member IDs (for example, [0010], [0011]) of the plurality of members 2 placed in the storage place B are also acquired.

  As shown in FIG. 6, when the position information calculation unit 10 obtains the position information of each member 2 corresponding to these member IDs using the position information database 5, four member IDs among the obtained seven member IDs. The member 2 corresponding to is a place A, the member 2 corresponding to the two member IDs is a place B, and the remaining member 2 is the specific member 2a. That is, when the position information calculation unit 10 obtains the position information of the other member 2b, the obtained position information is the placement A for the four other members 2b, and the two other members 2b are obtained. The location information is the storage location B.

When there are a plurality of position information of other members 2b obtained from the position information database 5 (place A and place B in FIG. 5), the position information determination unit 11 has the largest amount of position information of the other members 2b. That is, the mode value of the position information (place A in FIG. 5) is associated with the member ID [0005] of the specific member 2a, and the position of the specific member 2a is set using the positions of the other members 2b.
Thus, when the specific member 2a is close to the boundary line of a some placement place, the thing of a some placement place is contained as the positional information on the detected other member 2b. Even in such a case, since it can be considered that more members 2 of the same place are placed around the newly placed member 2 (specific member 2a), among the places of other members 2b, The most common place may be selected by majority decision (the mode is selected), and the place obtained by majority decision may be set as the position of the specific member 2a, so that the specific member 2a is placed at the boundary of the place. Even if it exists, the registration operation | work of the positional information on the specific member 2a can be performed easily.

As a result of reading the member tag 3a by the tag reader 4, when the mode value of the position information cannot be determined uniquely (for example, three of the six other members 2b are the placement A and the other three When it is in the storage place B), reading by the tag reader 4 may be performed again or a warning may be issued to the operator.
[Third Embodiment]
In the third embodiment, unlike the first embodiment and the second embodiment, when the tag ID of the member 2 is acquired by the tag reader 4 and the placement ID recorded in the position tag is also acquired. Will be described.

FIG. 7 shows a state in which the specific member 2a is arranged near the position tag 3b indicating the place E. In the following description, it is assumed that the member 2 (specific member 2a) having the member ID [0006] is newly placed in the placement place A, and the particular member 2a is placed near the position tag 3b indicating the placement place A.
As shown in FIG. 7, when the operator investigates the position of the member 2 with the tag reader 4, the member IDs (for example, [0005], [0005], [0006], [0008], [0009]) are arbitrarily acquired, and a placement ID (eg, [1001]) indicating placement A is also obtained.

  Here, when the position information calculation unit 10 obtains the position information of the other member 2b, the placement information A is obtained. The position information determination unit 11 uses the tag reader 4 to identify the member ID of the specific member 2a and the member ID of the other member 2b. When the location ID of the location tag 3b indicating the location is acquired, the location and specific member determined from the location ID of the location tag 3b instead of the obtained location information (location A) of the other member 2b The member ID [0006] of 2a is associated, and the position of the specific member 2a is set using the position information by the position tag 3b instead of the position of the other member 2b.

Thus, when there is a position tag 3b indicating a place near the specific member 2a, not only the member ID of the specific member 2a but also the place ID of the position tag 3b can be detected simultaneously. In this case, the location indicated by the position tag 3b that could be detected may be set as the location information of the specific member 2a newly placed, and the location information of the specific member 2a is registered using the location tag 3b indicating the location. Work can be done easily.
[Fourth Embodiment]
In the first to third embodiments described above, the member ID of the member 2 is acquired by the tag reader 4, the acquired member ID is sent to the position determining unit 6, and the position determining unit 6 The position information of the specific member 2a is determined using the acquired member ID.

In the fourth embodiment, a case where the position information already stored in the position information database 5 is corrected (a method for correcting the database itself) will be described.
As shown in FIG. 9, the position determination unit 6 includes a correction unit 12 that corrects the position information of the member 2 in the position information database 5 in addition to the position information calculation unit 10 and the position information determination unit 11.

  As a result of investigating the position of the member 2 by the operator, it is assumed that the member ID of the member 2 and the position information are stored in association with each other as shown in FIG. Here, as shown in FIG. 9, it is assumed that the member 2 having the member IDs [0001] to [0009] is definitely placed in the storage area A. In this case, since the position information of the member 2 having the member ID [0002] stored in the position information database 5 of FIG. 10 is the place B, the actual position of the member 2 and the position information database 5 It is considered that there is a possibility that the position information related to the member ID [0002] in the position information database 5 is incorrect because the position information is not consistent.

Under such circumstances, in the present embodiment, the correction unit 12 corrects the position information database 5.
Specifically, first, the correction unit 12 obtains the most position information in the position information database 5, that is, the mode value (position A) related to the position information, and another position information excluding the most position information (place A) ( When the number of places B) is equal to or less than a predetermined value, the position information (place B) whose number is equal to or less than the predetermined number is corrected to the most position information (place A). That is, the position information of the member 2 having the member ID [0002] is rewritten to the place A instead of the place B.

Note that the number (threshold value) of other position information serving as a reference for rewriting the position information may be arbitrarily set. For example, when one threshold value is set, as shown in FIG. The position information is always rewritten with the most position information.
According to this embodiment, if there is a member 2 whose position information has not been updated after being carried in, position information different from the position information of the other member 2b (surrounding member 2) is included in the location. Another member 2 to be held is mixed. When it is detected that there are a small number of members 2 having different position information in a wide place, it is preferable to correct the position information of the small number of members 2 to be the same as that of the surrounding members 2 because the position information is incorrect. In this embodiment, the position information is corrected by the correction unit 12, but the operator may be notified by a buzzer, blinking, or the like that there is a member 2 with different position information (there is a correction candidate). .
[Usage]
FIG. 11 shows a flowchart when the member 2 is actually managed based on the position management method of any one of the first to fourth embodiments.

First, the operator obtains (detects) a member ID between the specific member 2a and another member 2b different from the specific member 2a by going to a predetermined place with the tag reader 4 (S1). The tag reader 4 accesses the position information database 5 and acquires the position information of the detected member ID (S2).
If there is a member tag 3a not registered in the position information database 5 in the acquired position information (if there is an unknown member tag 3a), it is selected as an information update target candidate (S3). .

When the position information is registered for all the member tags 3a, as shown in the fourth embodiment, the position information in the member tag 3a (another member tag 3a) other than the most position information is predetermined. It is determined whether the number is less than or equal to the number, and if it is less than or equal to the predetermined number, it is selected as an information update target (S4, Yes).
If none of the above applies (S4, No), all the detected member tags 3a are set as no information update target candidates (S5).

The tag reader 4 displays the selected information update target candidate on the screen of the tag reader 4, and the operator approves the displayed candidate or selects the information update target from other detected tags. . If there is no need to update the information, the process may be terminated here (S6).
Further, as shown in the third embodiment, the tag reader 4 determines whether or not the detected RFID tag 3 includes the position tag 3b. If the position tag 3b is present (S7, Yes), A place associated with the position tag 3b is selected as an updated position candidate.

When there is no position tag 3b (S7, No), the tag reader 4 performs the processing shown in the first embodiment or, as shown in the second embodiment, the largest number of tags among the remaining tags. Are selected by majority vote, and are selected as updated position candidates (S8).
When the position tag 3b exists (S7, Yes), as shown in the third embodiment, the position information of the specific member 2a is registered using the place ID of the position tag 3b indicating the place (S9).

In each step (S), when updating the position information of the specific member 2a, the updated position candidates are displayed on the screen of the tag reader 4, and the operator approves the displayed candidates, or otherwise It is recommended that you select the position of yourself.
In addition, in the flowchart of FIG. 11, although 1st Embodiment-4th Embodiment mentioned above was combined, you may manage the member 2 with the method and apparatus shown to each embodiment.

By the way, this invention is not limited to said each embodiment, The shape of each member 2, a structure, a combination, etc. can be suitably changed in the range which does not change the essence of invention.
In said embodiment, although member ID of the specific member 2a and member ID of the other member 2b were acquired simultaneously, you may acquire not only in this but at different time. For example, first, the member ID of the specific member 2a may be acquired by the tag reader 4, and after a while, another member 2b may be read by pressing another button of the tag reader 4. Further, the placement ID of the position tag 3b may be read by reading the member ID of the other member 2b while acquiring the member ID of the specific member 2a by the tag reader 4, and pressing another button of the tag reader 4 after a while. .

DESCRIPTION OF SYMBOLS 1 Position management system 2 Member 2a Specific member 2b Other members 3 RFID tag 3a Member tag 3b Position tag 4 ID tag reader 5 Position information database 6 Position determination means 7 Communication means 10 Position information calculation part 11 Position information determination part 12 Correction part

Claims (9)

In a position management system that manages the positions of a plurality of members arranged in an area,
A member tag provided in each member and storing member identification information of each member therein, a tag reader capable of reading the member identification information in the member tag, member identification information of each member, and each member in the area A position information database that stores the position information in association with each other, and a position determination unit that determines the position of the member using the position information database,
The tag reader simultaneously or simultaneously with member identification information of a specific member that is a member whose position is to be specified and member identification information of another member that is located around the specific member and is different from the specific member Configured to get and
The position determining means obtains position information of another member based on member identification information and a position information database of another member acquired by the tag reader, and obtains the obtained position information of the other member as position information of the specific member. A position management system for members. The position determining means includes a position information calculation unit for obtaining position information of other members from member identification information of other members stored in a position information database;
Position information determination unit that associates the position information of the other member with the member identification information of the specific member acquired by the tag reader so that the position information of the other member obtained by the position information calculation unit is the position information of the specific member. When,
The position management system for members according to claim 1, comprising:   The member position management system according to claim 2, wherein the position information determination unit uses a mode value related to the obtained position information of another member as the position information of the specific member. In the area, one or a plurality of places are set, and in the place, a position tag that stores place identification information indicating each place is installed.
The tag reader is configured to be able to read the place identification information in the position tag,
3. The position of the member according to claim 2, wherein the position information determination unit uses the place identification information read by the tag reader as the position information of the specific member instead of the obtained position information of the other member. Management system. The position determination means includes a correction unit that corrects position information of members in the position information database,
The correction unit obtains a mode value related to position information in the position information database, and when the number of other position information excluding the mode value is equal to or less than a predetermined value, the position information whose number is equal to or less than the predetermined value. The member position management system according to claim 2, wherein the member position management system corrects the frequency value. In a position management method for managing the positions of a plurality of members arranged in an area,
A member tag provided in each member and storing member identification information of each member therein, a tag reader capable of reading the member identification information in the member tag, member identification information of each member, and each member in the area And a location information database for storing the location information in association with each other,
By the tag reader, the member identification information of a specific member that is a member whose position is to be specified and the member identification information of another member that is located around the specific member and is different from the specific member are simultaneously or differently. Acquired,
Further, the position information of the other member is obtained based on the member identification information and the position information database of the other member acquired by the tag reader, and the obtained position information of the other member is used as the position information of the specific member. The position management method of the member characterized by this.   The member position management method according to claim 6, wherein a mode value relating to the obtained position information of another member is used as the position information of the specific member. When one or a plurality of places are set in the area, and a place tag for storing place identification information indicating each place is installed in the place,
The placement identification information in the position tag is read by the tag reader,
7. The member position management method according to claim 6, wherein the place identification information read by the tag reader is used as the position information of the specific member instead of the obtained position information of the other member.   When correcting the position information of the member in the position information database, the mode value related to the position information is obtained in the position information database, and the number of other position information excluding the mode value is equal to or less than a predetermined value. The position management method for a member according to any one of claims 6 to 8, wherein position information whose number is equal to or less than a predetermined value is corrected to the mode value.