JP2005314886A - Article position management system and method in construction site - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To manage a position of respective articles at a construction site by using IC tags. <P>SOLUTION: The IC tag (a fixed tag) 12 is respectively installed in a plurality of fixing positions of the construction site, and the IC tag (a movable tag) 14 is installed on the respective articles carried in the construction site. A worker carries an IC tag reader terminal 16 having the function of reading tag ID when approaching the IC tag. The tag ID of the respective IC tags, a tag classification flag for indication whether a tag is the fixed tag or the movable tag, position data for expressing a position of the IC tags, and article data for indicating the installed article when the tag is the movable tag, are associatively stored in a position information database 20. A movable tag position calculating part 58 calculates position data on the movable tag on the basis of the position data and time data on a plurality of fixed tags. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a system and method for managing the location of each item such as various devices, tools, and materials at a construction site.

  Conventionally, for example, as disclosed in Patent Document 1, a construction work support system using an IC tag is known. Here, the IC tag is an element that has a memory for storing data therein and is configured so that a nearby IC tag reader can read the stored data.

In the system disclosed in Patent Document 1, an IC tag that records information indicating a position at a specific point in a construction site and information about a device installed at the position is installed, and a data reading device ( By reading data from each IC tag with an IC tag reader), information such as the current position in the construction site can be acquired.
JP 2001-140467 A

  By the way, there are many items such as various equipment, tools, materials, etc. on the construction site, and in order to make each item available when necessary, it is possible to manage where the item exists. is necessary. However, the situation on the site changes as the construction process progresses, and the position of each article also moves accordingly. For this reason, it is not easy to manage the position of a large number of articles at the construction site. If the location of the necessary articles is lost, it takes a long time to search for the articles, resulting in a time and economic loss. Resulting in.

  However, the system disclosed in Patent Document 1 acquires information on the current position of the worker by reading an IC tag placed at a specific position with a reader carried by the worker, and determines the position of the article. It cannot be managed.

  The present invention has been made in view of the above points, and an object thereof is to enable management of the position of each article on a construction site using an IC tag.

In order to achieve the above object, the present invention includes an IC tag storing a unique tag ID and an IC tag reader device having a function of reading the stored tag ID when approaching the IC tag. A system for managing the position of an article at a construction site,
The IC tag is attached to each of a plurality of fixed positions on the construction site, and is attached to each article carried into the construction site such as equipment, materials, and tools,
A tag ID of each IC tag, a tag classification flag indicating whether the IC tag is a fixed tag attached to the fixed position or a movable tag attached to the article, and a position representing the position of the IC tag When the data and the IC tag are the movable tags, a position information database in which article data indicating articles to which the data tag is attached are stored in association with each other;
Tag classification for determining whether the IC tag is the fixed tag or the movable tag with reference to the tag classification flag stored in the position information database based on the tag ID read by the IC tag reader device A determination unit;
When the tag classification determination unit determines that the tag is a fixed tag, the position data of the IC tag is acquired from the position information database, and the current time is set as the detection time of the IC tag and the tag ID and the acquisition A fixed tag information storage unit for storing the position data and the detection time in association with each other;
A movable tag information storage unit that stores the tag ID and the detection time in association with each other when the tag classification determination unit determines that the tag is a movable tag;
A movable tag position calculation unit that calculates position data based on position data and detection time of a fixed tag stored in the fixed tag information storage unit for the movable tag corresponding to the tag ID stored in the movable tag information storage unit; ,
A position storage unit that stores the calculated position data of the movable tag in the position information database.

  In the present invention, the “IC tag” refers to an element that is provided with a memory for storing data therein, and that is configured so that an IC tag reader device that falls within a predetermined communicable range can read the stored data. means. This element is sometimes called an “RF tag” or the like.

  The article position management system of the present invention includes a server device that is communicably connected to the tag IC reader device, and the server device receives the read tag ID from the tag IC reader device. In addition to having an information receiving unit, the position information database, the tag classification determination unit, the fixed tag information storage unit, the movable tag information storage unit, the movable tag position calculation unit, and the position storage unit are provided. Can do.

  Alternatively, in the article position management system of the present invention, the IC tag reader device includes the tag classification determination unit, the fixed tag information storage unit, the movable tag information storage unit, the movable tag position calculation unit, and the position storage unit. The position information database is constructed by being distributed among the plurality of IC tag reader devices, and each IC tag reader device stores the position data of the movable tag calculated by the position storage unit in its own position information database; You can also

In the present invention, the movable tag position calculation unit determines the position Ps of the movable tag from the position P1 of the first fixed tag detected before the detection time of the movable tag and the detection time of the movable tag. The position P2 of the second fixed tag detected later, the elapsed time T1 from the detection of the first fixed tag to the detection of the movable tag, and the first time after the detection of the movable tag. Using the elapsed time T2 until two fixed tags are detected, Ps = (P2 · T1 + P1 · T2) / (T1 + T2)
It is good also as calculating by.

  The tag classification flag stored in the position information database may further include a classification changing unit that changes a value indicating a movable tag to a value indicating a fixed tag.

  Moreover, it is good also as providing a display means to display each article | item with which the movable tag was attached based on the data recorded on the said positional information database in the applicable position on the map showing the said construction site.

  ADVANTAGE OF THE INVENTION According to this invention, the position of each article | item in a construction site can be managed using an IC tag.

  FIG. 1 is an overall configuration diagram of a construction site article position management system according to an embodiment of the present invention. As shown in the figure, the system of the present embodiment includes a management server 10, an IC tag 12 fixed at a specific position on the construction site 1, and various items S1, S1, and the like that are to be managed. An IC tag 14 attached to S2 and the like, and an IC tag reader terminal 16 that is carried by an operator and has a function of reading data from the IC tags 12 and 14 and a function of wireless communication with the management server 10 are provided. ing. Each IC tag 12, 14 stores a unique tag ID, and when an operator enters the data reading range in proximity to any one of the IC tags 12 or 14, the IC tag reader terminal 16 detects the IC tag 12. Alternatively, the tag ID can be read from 14. Each IC tag reader terminal 16 is assigned a unique ID (terminal ID), and the tag ID read from the IC tags 12 and 14 is transmitted to the management server 10 together with its own terminal ID. Since the position of the IC tag 12 is fixed, it is hereinafter also referred to as a fixed tag, and since the position of the IC tag 14 changes according to the movement of the article, it is also referred to as a movable tag hereinafter.

  The management server 10 is provided with a position information database 20. FIG. 2 shows an example of data stored in the position information database 20. As shown in the figure, in the position information database 20, for each of the IC tags 12 and 14, a tag ID, a classification flag indicating whether the tag is a fixed tag or a movable tag, and the type of the article to which the movable tag is attached. The operator who updated the position information of the movable tag (position information updater), the latest position information update date and time (position information date and time), the position data of each IC tag (coordinate values of X, Y, and Z), etc. Stored. Further, in the present embodiment, the tag ID and the terminal ID of the IC tag reader terminal 16 are set to have a non-overlapping value. For each IC tag reader terminal 16, the name of the worker carrying the IC tag reader "(ID 35, 36 in FIG. 2).

  FIG. 3 is a functional block diagram of the management server 10. As shown in the figure, the management server 10 includes a tag information reception unit 50, a tag classification determination unit 52, a fixed tag information storage unit 54, a movable tag information storage unit 56, a movable tag position calculation unit 58, a position storage unit 60, And each function part of the classification change part 62 is provided.

  The tag information receiving unit 50 receives data such as the tag ID of the IC tags 12 and 14 and the terminal ID of the IC tag reader terminal 16 from the IC tag reader terminal 16.

  The tag classification determination unit 52 refers to the tag classification flag stored in the position information database 20 based on the tag ID received by the tag information reception unit 50 and determines whether the IC tag corresponding to the tag ID is the fixed tag 12. It is determined whether the tag is movable.

  The fixed tag information storage unit 54 reads the position data stored in the position information database 20 for the IC tag determined to be the fixed tag 12 by the tag classification determination unit 52, the tag IC of the IC tag, the position data, and The current date and time (ie, the detection date and time of the IC tag) are stored in association with each other.

  The movable tag information storage unit 56 associates the tag IC of the IC tag with the current date and time (that is, the detected date and time of the IC tag) for the IC tag determined to be the movable tag 14 by the tag classification determination unit 52. Remember.

  The movable tag position calculation unit 58 calculates the position data of the movable tag 14 stored in the movable tag information storage unit 56 based on the position data of the fixed tag 12 stored in the fixed tag information storage unit 54 and the detection date and time. The specific contents of this calculation process will be described later.

  The position storage unit 60 stores the position data of the movable tag 14 calculated by the movable tag position calculation unit 58 in the position information database 20. At this time, the current date and time are stored in the position information database 20 as the update date and time, and the name of the worker carrying the IC tag reader terminal 16 that has detected the movable tag 14 is stored as the position information updater.

  Further, the classification changing unit 62 changes the tag classification flag stored in the position information database 20 from a value indicating the movable flag to a value indicating the fixed flag, for example, in response to an input operation by the user. Such tag classification change processing is performed, for example, when a material carried into a construction site is installed in a building and becomes a fixed object.

  Hereinafter, in the present embodiment, the management server 10 detects the position information of each article based on the data read from the IC tags 12 and 14 by the IC tag reader terminal 16, and the position information database 20 shown in FIG. The process of updating will be described. In addition, since the coordinates of the attachment position of the fixed tag 14 are known in advance, the coordinate values are stored as position data in the position information database 20, and the movable tag 14 is attached. Since an article is known in advance, the article type is stored in the position information database 20. Each worker carries the IC tag reader terminal 16 and moves within the construction site.

FIG. 4 is a flowchart showing the flow of processing in the present embodiment. As shown in the figure, when the IC tag reader terminal 16 detects the IC tag 12 or 14 (that is, when a tag ID is received from the IC tag 12 or 14), the tag ID together with the tag ID of the IC tag reader terminal 16 is included. The data is transmitted to the management server 10 (S100 → S102). This operation is repeated until a predetermined end operation is performed by an operation button or the like of the IC tag reader terminal 16, and when the end operation is performed (S104), an end signal is transmitted to the management server 10 (S106).
In the management server 10, when the tag information receiving unit 50 receives the terminal IC and the tag ID from the IC tag reader terminal 16 (S200), the tag classification determining unit 52 refers to the position information database 20 and corresponds to the received tag ID. The classification flag to be read is read (S202), and it is determined whether the tag is a fixed tag or a movable tag based on the classification flag (S204). As a result, if it is a movable tag, the movable tag information storage unit 56 stores the tag ID and the current date in association with each other (S206), and then proceeds to S218 described later. On the other hand, if the tag is a fixed tag, the fixed tag information storage unit 54 reads position data for the tag ID from the position information database 20 (S208), and associates the tag ID with the read position data and the current date and time. (S210). Further, the position data of the IC tag reader terminal 16 stored in the position information database 20 is updated to the read position data value of the fixed tag 12, and the current date is recorded as the position information date (S211).

  Next, the movable tag position calculation unit 58 refers to the data stored in the movable tag information storage unit 56 and detects the movable tag after the previous fixed tag is detected until the current fixed tag is detected. If the movable tag is detected, the movable tag is detected based on the previously detected fixed tag position data and detection date and time, and the fixed tag position data and detection date and time detected this time. The tag position is calculated (S214).

  Here, with reference to FIG. 5, the movable tag position data calculation process performed by the movable tag position calculation unit 58 in S214 will be described. FIG. 5 shows a case where the fixed tag 12A, the movable tag 14A, and the fixed tag 12B are detected in this order in the process of moving the IC tag reader terminal 16, and the time when the second fixed tag 12B is detected. Thus, the position of the movable tag 14A detected between the two fixed tags 12A and 12B is calculated.

That is, the fixed tag 12B corresponds to the “fixed tag detected this time” in S214, and the fixed tag 12A corresponds to the “fixed tag detected last time” in S214. In this case, the position of the fixed tag 12B detected this time is P2, the position of the fixed tag 12A detected last time is P1, the elapsed time from the detection of the fixed tag 12A to the detection of the movable tag 14A is T1, and the movable tag 14A is Assuming that the elapsed time from detection until the fixed tag 12B is detected is T2, the position Ps of the movable tag 14 is expressed by the following equation (1) on the assumption that the movement path of the IC tag reader terminal 16 is a straight line. Can be calculated. Here, P1, P2, and Ps are three-dimensional position coordinate vectors.
Ps = (P2 · T1 + P1 · T2) / (T1 + T2) (1)

  The position storage unit 60 calculates the position coordinates, operator name, and current date and time of the movable tag 14 calculated as described above, respectively, the position data, the position information updater name, and the position information of the corresponding movable tag 14. The date / time is recorded in the position information database 20 (S216). The position information updater name is obtained by reading the operator name stored in association with the terminal ID for the IC tag reader terminal 16 from the position information database 20.

  The above processing by the management server 10 is repeated until an end signal is sent for each IC tag reader terminal 16 (S218).

  Further, the position information stored in the position information database 20 can be browsed on a screen having a form as shown in FIG. 6, for example. The example of FIG. 6 generates a map image based on the map data of the construction site, obtains the tag ID, the item type, and the position data of each item with reference to the position information database 20, and displays the map image on the map image. A symbol representing each article, a tag ID, an article type, and the like are drawn at the position represented by the position data. The screen illustrated in FIG. 6 may be displayed on a computer terminal connected to the management server 10, or may be displayed on each IC tag reader terminal 16, for example.

  As described above, according to the present embodiment, when the worker carrying the IC tag reader terminal 16 moves within the construction site, the position coordinates of the movable tag 14 (that is, the position coordinates of the article to which the movable tag 14 is attached). ) Is calculated and updated on the position information database 20. Therefore, the position of each article can be managed on the position information database 20 simply by carrying many IC tag reader terminals 16 and moving them. Then, by displaying the position information managed in the position information database 20 in a screen form as shown in FIG. 6, for example, it is possible to confirm at a glance where the desired article exists.

  Further, the classification change unit 62 can change the tag classification flag stored in the position information database 20 from a value indicating a movable tag to a value indicating a fixed tag, so that, for example, a material carried into a construction site is installed in a building. Then, the IC tag attached to the material can be used as the fixed tag 12 after that. As can be seen from the above description, since the position of the movable tag 14 is calculated based on the detected position data of the fixed tag 12, the position of the movable tag 14 is calculated as the number of the fixed tags 12 increases. This is advantageous. Therefore, the movable tag 14 attached to the fixed material or the like can be converted to the fixed tag 12, and the number of the fixed tags 12 increases as the construction progresses. 14 positions can be calculated more effectively.

  In the above embodiment, on the assumption that the movement path of the IC tag reader terminal 16 is linear, the position of the movable tag 14 is determined based on the positions and detection points of the two fixed tags 12 detected before and after that. The calculation was made according to the above equation (1). However, the present invention is not limited to this. For example, the movement path of the IC tag reader terminal 16 is estimated from the positions and detection points of the plurality of fixed tags detected, and the position of the movable tag 14 is considered in consideration of the movement path. You may make it perform calculation.

  In the above embodiment, the IC tag reader terminal 16 is carried by the worker. However, the present invention is not limited to this, and the IC tag reader terminal 16 may be attached to a device that moves in the field such as a forklift.

  Further, in the above-described embodiment, the position information database 20 is provided in the management server 10, and tag information detected by each IC tag reader terminal 16 is transmitted to the management server 10. By calculating the position, the management server 10 collects and manages the position information of each article. That is, in the above-described embodiment, the management server 10 includes the functional units of the tag classification determination unit 52, the fixed tag information storage unit 54, the movable tag information storage unit 56, the movable tag position calculation unit 58, and the position storage unit 60. did. However, the present invention is not limited to this, and each IC tag reader terminal is configured by distributing the position information database 20 to each IC tag reader terminal 16 and configuring each IC tag reader terminal 16 to include the functional units 52-60. 16 may have a function of calculating the position of the movable tag based on the tag information detected by itself, and the position data of the movable tag calculated by each may be exchanged by communication between the IC tag reader terminals 16. .

1 is an overall configuration diagram of a construction site article position management system according to an embodiment of the present invention. It is a figure which shows the example of the data stored in the positional information database in this embodiment. It is a functional block diagram of the management server in this embodiment. It is a flowchart which shows the flow of the process in this embodiment. It is a figure for demonstrating the position data calculation process of the movable tag in this embodiment. It is a figure which shows the example of the display screen of the positional information stored in the positional information database.

Explanation of symbols

10 Management server 12 IC tag (fixed tag)
14 IC tag (movable tag)
DESCRIPTION OF SYMBOLS 16 IC tag reader terminal 20 Position information database 50 Tag information receiving part 52 Tag classification | category determination part 54 Fixed tag information storage part 56 Movable tag information storage part 58 Movable tag position calculation part 60 Position storage part 62 Classification change part

Claims (7)

An IC tag storing a unique tag ID, and an IC tag reader device having a function of reading the stored tag ID when approaching the IC tag, for managing the position of an article on a construction site A system,
The IC tag is attached to each of a plurality of fixed positions on the construction site, and is attached to each article carried into the construction site such as equipment, materials, and tools,
A tag ID of each IC tag, a tag classification flag indicating whether the IC tag is a fixed tag attached to the fixed position or a movable tag attached to the article, and a position representing the position of the IC tag When the data and the IC tag are the movable tags, a position information database in which article data indicating articles to which the data tag is attached are stored in association with each other;
Tag classification for determining whether the IC tag is the fixed tag or the movable tag with reference to the tag classification flag stored in the position information database based on the tag ID read by the IC tag reader device A determination unit;
When the tag classification determination unit determines that the tag is a fixed tag, the position data of the IC tag is acquired from the position information database, and the current time is set as the detection time of the IC tag and the tag ID and the acquisition A fixed tag information storage unit for storing the position data and the detection time in association with each other;
A movable tag information storage unit that stores the tag ID and the detection time in association with each other when the tag classification determination unit determines that the tag is a movable tag;
A movable tag position calculation unit that calculates position data based on position data and detection time of a fixed tag stored in the fixed tag information storage unit for the movable tag corresponding to the tag ID stored in the movable tag information storage unit; ,
A position storage unit that stores the calculated position data of the movable tag in the position information database;   A server device communicably connected to the tag IC reader device, the server device having a tag information receiving unit for receiving the read tag ID from the tag IC reader device; The construction site according to claim 1, further comprising an information database, the tag classification determination unit, the fixed tag information storage unit, the movable tag information storage unit, the movable tag position calculation unit, and the position storage unit. Article position management system.   The IC tag reader device includes the tag classification determination unit, the fixed tag information storage unit, the movable tag information storage unit, the movable tag position calculation unit, and the position storage unit, and the position information database includes a plurality of the ICs. 2. The construction site according to claim 1, wherein each IC tag reader device stores the position data of the movable tag calculated by the position storage unit in its own position information database. Article position management system. The movable tag position calculation unit detects the position Ps of the movable tag, the first fixed tag position P1 detected before the detection time of the movable tag, and the first position detected after the detection time of the movable tag. Position P2 of the second fixed tag, an elapsed time T1 from when the first fixed tag is detected until the movable tag is detected, and the second fixed tag is detected after the movable tag is detected Ps = (P2 · T1 + P1 · T2) / (T1 + T2)
The article position management system for a construction site according to any one of claims 1 to 3, wherein calculation is performed using the following formula.   The classification change part which changes the said tag classification flag stored in the said positional information database from the value which shows a movable tag to the value which shows a fixed tag further, The any one of Claims 1-4 characterized by the above-mentioned. Article location management system for construction sites.   6. A display means for displaying each article to which a movable tag is attached at a corresponding position on a map representing the construction site based on data recorded in the position information database. A construction site article position management system according to any one of the above. This is a method for managing the position of an article at a construction site by using an IC tag storing a unique tag ID and an IC tag reader device having a function of reading the stored tag ID when approaching the IC tag. And
Attaching the IC tag to each of a plurality of fixed positions on the construction site, and attaching to each article carried into the construction site such as equipment, materials, tools, etc.
A tag ID of each IC tag, a tag classification flag indicating whether the IC tag is a fixed tag attached to the fixed position or a movable tag attached to the article, and a position representing the position of the IC tag A database construction step of providing a positional information database in which data and article data indicating an article to which the IC tag is attached when the IC tag is the movable tag;
Tag classification for determining whether the IC tag is the fixed tag or the movable tag by referring to the tag classification flag stored in the position information database from the tag ID read by the tag IC reader device A determination process;
When it is determined that the tag is a fixed tag in the tag classification determination step, the corresponding position data is acquired from the position information database, and the current time is set as the detection time of the fixed tag and the acquired tag ID and the acquired A fixed tag information storage step of storing the position data and the detection time in association with each other;
A movable tag information storage step of storing the tag ID and the detection time in association with each other as the detection time of the fixed tag when the tag classification determination step determines that the tag is a movable tag;
With respect to the movable tag corresponding to the tag ID stored in the movable tag information storage step, the position of the fixed tag detected before the detection time of the movable tag with reference to the data stored in the fixed tag information storage step A movable tag position calculating step for calculating position data of the movable tag based on the data and the detection time, and the position data and detection time of the fixed tag detected after the detection time of the movable tag;
A position storing step of storing the calculated position data of the movable tag in the position information database.