JP2010164353A - System for notifying position of buried object, and rfid tag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a buried-conduit position notifying system which enables easy acquisition of information on the path of buried conduits and on these buried conduits at a job site, in boring operation of a concrete. <P>SOLUTION: The buried-object position notifying system includes: a database server 30 having a storage unit for storing buried object information which associates identification information for an object buried in a partition wall of reinforced concrete, with positional information of the object; an ID tag 10 which is annexed to the object, is mounted with an IC chip for storing the identification information of the object, includes a first antenna, and includes second antennas (auxiliary antennas 11 and 12) at positions of concrete coverings over both surfaces of the partition wall; an RFID reader 20 for reading the identification information of the object in the ID tag; and a terminal 21 which transmits the identification information of the object read by the RFID reader 20 to the database server 30, receives positional information of the object from the database server 30, and displays the positional information of the object on a display element. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a system for guiding the position of a buried electric conduit buried in concrete in a nuclear power plant and the like, and an RFID tag used therefor. The present invention relates to an embedded conduit position guide system and an RFID tag that can easily grasp information.

  In nuclear power plants, rooms in buildings are surrounded by reinforced concrete walls for radiation shielding and earthquake resistance. A myriad of instruments, devices, and panels (for example, control panels) are installed in each room, and many cables are connected to these instruments, devices, and panels for power supply, control, and measurement. When these cables cross a room, the cables are stored in an embedded electric conduit buried in concrete in order to penetrate the concrete wall. Here, the buried conduit is installed so as to sew between the reinforcing bars according to the drawing instruction route before placing the concrete. If it is necessary to add a buried conduit after the concrete has been cast, the concrete is drilled. At this time, in order not to damage the buried conduit and the cable stored in this, check the route of the existing buried conduit in the drawing, and search for a place avoiding this to determine the boring position. There is a need.

  On the other hand, as a method of detecting the position of an embedded object, a radio wave having a resonance frequency of the RFID element is transmitted from an object identification device to an RFID (Radio Frequency Identification) element attached to the object, and the RFID element for the transmitted radio wave is transmitted. And a method of specifying the embedded position from the position data of the satellite navigation system is disclosed (for example, see Patent Document 1).

JP 2001-99946 A

  In the disclosed technology of Patent Document 1, even if it is effective for detecting the position of an embedded object under a normal outdoor road, it is surrounded by a reinforced concrete wall for radiation shielding and earthquake resistance, as in a nuclear power plant. In some places, radio waves are shielded by the reinforcing bars, making it difficult to detect the RFID element. In addition, it was difficult to send and receive radio waves to and from the navigation satellite from inside the nuclear power plant room.

  Furthermore, since the buried conduit is sewn between the reinforcing bars before placing the concrete, the RFID element does not receive the radio wave even if it transmits the radio wave of the resonance frequency of the RFID element from the object identification device. It was a problem.

  The present invention is an invention for solving the above-mentioned problems, and in the concrete wall boring operation, the buried electric conduit that can easily grasp the route of the existing buried electric conduit and the information of the existing buried conduit at the site. An object is to provide a position guidance system and an RFID tag.

  In order to achieve the above-described object, the buried object position guiding system includes identification information (for example, buried conduit identification information) of an object embedded in a reinforced concrete partition wall and position information (for example, a buried conduit). A management server (for example, the database server 30) having a storage unit for storing embedded object information (for example, the embedded conduit table 321) and the object identification information attached to the object. An ID tag (for example, ID tag 10) having an IC chip and a first antenna, a tag reader (for example, RFID reader 20) that reads identification information of an object of the ID tag, and identification information of an object read by the tag reader. A terminal (for example, terminal 21) that transmits to the management server, receives the position information of the object from the management server, and displays the position information of the object on the display unit; For example, ID tag, a second antenna extending to the head position of the concrete of the partition wall (e.g., the auxiliary antenna 11, 12) and providing a.

  ADVANTAGE OF THE INVENTION According to this invention, in the boring operation | work of a concrete wall, the path | route of the existing underground conduits and the information of those underground conduits can be grasped | ascertained easily on the spot.

It is a block diagram which shows a buried conduit position guide system. It is explanatory drawing which shows the outline of a directional RFID tag, and the attachment method to a buried conduit. It is explanatory drawing which shows the display method of a buried conduit position guidance. It is explanatory drawing which shows a buried conduit tube table. It is explanatory drawing which shows the display method of a buried electric conduit. It is explanatory drawing which shows the example of a display of a buried electric conduit. It is a flowchart which shows a work procedure. It is explanatory drawing which shows the example of a display to the terminal of a buried conduit path and buried conduit related information. It is explanatory drawing which shows the attachment method of an auxiliary antenna.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a configuration diagram showing an embedded conduit position guide system. FIG. 1 also shows the configuration of the buried conduit and the configuration of an RFID tag (hereinafter referred to as an ID tag). The buried conduit position guide system is attached to the buried conduit 100 having the auxiliary antennas 11 and 12 (second antenna) extending to the concrete cover 41 (concrete cover) of the wall 50 (partition wall). ID tag 10 (see FIG. 2), (2) RFID reader 20 (tag reader) for acquiring embedded conduit identification information for identifying embedded conduit 100 from ID tag 10, and (3) acquired embedded conduit identification information Including the terminal 21 for displaying the buried conduit related information received from the database server 30 and (4) the database server 30 having the communication unit 31, the storage unit 32, and the processing unit 33. Composed. The storage unit 32 stores an embedded conduit table 321 (see FIG. 4) (embedded conduit information, embedded object information) including embedded conduit identification information. The concrete cover 41 refers to a concrete portion from the reinforcing bar 42 to the wall surfaces 51 and 52.

  The buried electric conduit 100 is installed between the reinforcing bars 42. At this time, the ID tag 10 is attached in various directions depending on the installed state of the buried electric conduit 100. In FIG. 1, it faces the wall surface 51 side. For this reason, when transmitting and receiving radio waves (referred to those having a frequency lower than that of light, that is, having a longer wavelength) from the wall surface 52 side by the RFID reader 20, the RFID radio waves are transmitted from the RFID reader 20 on the wall surface 51 side. Compared with the case of transmitting / receiving, the transmission / reception sensitivity of radio waves hidden behind the buried conduit 100 is worse. However, the confirmation of the position of the buried conduit 100 may be performed from either the wall surface 51 or the wall surface 52 depending on the work situation, so the auxiliary antenna 11 is installed on the wall surface 51 side and the auxiliary antenna 12 is installed on the wall surface 52 side. Here, the reason why the auxiliary antennas 11 and 12 are extended to the concrete cover 41 is to reduce the adverse effect of the reinforcing bar 41 on the radio wave transmission / reception sensitivity between the ID tag 10 and the RFID reader 20. As a result, radio waves can be transmitted and received from the wall surface 51 and the wall surface 52 via the auxiliary antennas 11 and 12 to the ID tag 10 attached to the buried conduit 100 from the RFID reader 20 according to the work situation. When the auxiliary antennas 11 and 12 are extended to the concrete cover 41, the auxiliary antennas 11 and 12 are attached to the reinforcing bars 42 with an insulating fixing bracket in order to prevent damage to the auxiliary antennas 11 and 12 due to an impact at the time of placing the concrete. It may be fixed.

  FIG. 2 is an explanatory diagram showing an outline of a directional RFID tag and a method for attaching it to a buried electric conduit. The ID tag 10 includes an IC chip 13 and a directional antenna (dipole antenna) 14 (first antenna). The IC chip 13 stores information for identifying the buried conduit 100, and the directional antenna 14 transmits and receives identification information between the RFID reader 20 and the buried conduit by radio waves. Here, due to the directivity of the antenna, the RFID reader 20 receives radio waves only when the RFID reader 20 is at a certain relative position with respect to the directional antenna 14. For example, the RFID reader 20 is set to receive radio waves when the longitudinal direction 15 of the directional antenna 14 and the RFID reader 20 become horizontal. Further, the longitudinal direction 15 of the directional antenna 14 may be attached in accordance with the course direction 16 of the buried conduit 100. Note that the attachment method shown in FIG. 2 is effective when grasping a buried conduit on the wall that does not contain the reinforcing bar 42 or the like.

  When a radio wave including a control signal is transmitted from an antenna (not shown) in the RFID reader 20, the directional antenna 14 in the ID tag 10 receives the radio wave from the RFID reader 20, and generates an electromotive force due to the resonance action of the antenna. To do. A circuit in the IC chip 13 is activated by the generated power and performs necessary processing. The processing result is transmitted from the directional antenna 14 on the ID tag 10 side.

  FIG. 9 is an explanatory view showing a method of attaching the auxiliary antenna. A coupling antenna 17 that is capacitively coupled to the directional antenna (first antenna) 14 is provided, and auxiliary antennas (second antennas) 11 and 12 that are dipole antennas are provided at the tip of the feeder line 18 via the feeder line 18. Is provided. The coupling antenna 17 is electrostatically coupled, but is not limited thereto. For example, the directional antenna 14 may receive radio waves from the coupling antenna 17, and the coupling antenna 17 may receive radio waves from the directional antenna 14.

  FIG. 3 is an explanatory view showing a method of displaying the buried conduit position guide. The difference between the buried conduits displayed on the terminal 21 in the two rooms 3 and 4 sandwiching the wall 50 will be described. As shown in FIG. 3, when the ID tag 10 is read from the room 3 through the wall surface 51 by the RFID reader 20, the route of the buried conduit 100 rising upward is displayed on the terminal 21 as shown in the display 3 </ b> A. The On the other hand, when the ID tag 10 is read from the room 4 through the wall surface 52 by the RFID reader 20, the terminal 21 displays the route of the buried conduit 100 that goes up to the left as shown in the display 4A. Thus, by changing the display method from different rooms, it becomes possible to easily grasp the paths of the buried conduits and the information of those buried conduits at the site. The reason will be described with reference to FIG.

  FIG. 4 is an explanatory view showing an embedded conduit table. The buried conduit table 321 is stored in advance in the storage unit 32 (see FIG. 1) of the database server 30, and is a room number (No means a number), which is a room identification number, and a buried conduit identification. RFID No. which is information, conduit No. which is an identification number of the buried conduit, and drawing No. which is a drawing number where the buried conduit is described. Specifically, as shown in FIG. 2, the drawing of the conduit pipe embedded in the wall 50 is registered in the database server 30 in advance with the case when viewed from the room 3 as the front and the case when viewed from the room 4 as the back. . Specifically, RFIDNoR0015, which is the identification number of the ID tag 10, is attached to the buried conduit of conduit number A502, and when viewed from room 3, corresponds to the table of drawing number N0053. , Meaning that it corresponds to the back of the drawing number N0053.

  Prior to the boring operation for drilling a hole in the wall 50, the operator selects a room to work on the terminal 21 at the site and uses the RFID reader 20 to identify the buried conduit identification information from the IC chip 13 (see FIG. 2) of the ID tag 10. Read. Then, when the operator presses a buried conduit confirmation button (not shown) of the terminal 21, the selected room number and the buried conduit identification information (RFIDNo) read by the RFID reader 20 are stored in the database server 30. Send. The processing unit 33 of the database server 30 searches the buried conduit table 321 using the received room number and the buried conduit identification information as keys, and extracts the corresponding conduit No and drawing No. Further, the processing unit 33 of the database server 30 performs selection processing as drawing information corresponding to the front or back from the drawing information stored in the storage unit 32, and along with the conduit No, the route information of the buried conduit. Is sent to the terminal 21. The terminal 21 can display the received conduit No and drawing information on the display unit.

  FIG. 5 is an explanatory view showing a display method of the buried conduit. As shown in FIG. 5, the depth of the buried conduit 100 with respect to the wall 50 can be expressed on the display unit of the terminal 21. Reference numeral 211 indicates that the left end of the buried conduit 100 is installed toward the back. Reference numeral 212 indicates that the left end portion of the buried conduit 100 is facing forward. Reference numeral 213 indicates that the buried conduit 100 is buried by a cross mark (x) but is not used.

  FIG. 6 is an explanatory view showing a display example of the buried conduit. As another display example displayed on the display unit of the terminal 21, two rooms 5 and 6 sandwiching the wall 50 will be described. The buried conduit 100 is buried in the wall 50 between the room 5 and the room 6, but the outlet of the buried conduit 100 has both ends on the room 5 side.

  As shown in FIG. 6, when the ID tag 10 is read from the room 5 with the RFID reader 20, the corresponding buried conduit 100 is displayed so that both ends are directed toward the front side as indicated by the display 5A. (See reference numeral 212 in FIG. 5). On the other hand, when the RFID is read from the room 6 by the RFID reader 20, the embedded conduit 100 is displayed so that both ends face toward the back as shown in the display 6A (see reference numeral 211 in FIG. 5).

  FIG. 7 is a flowchart showing a work procedure. The operation will be described below according to this work procedure. Reference is made to FIG. 1 as appropriate. First, the operator needs to newly lay a cable, and when there is no spare buried conduit on the wall 50 of the cable laying route (route), the worker starts a boring plan for the wall (step S1). Next, the worker investigates the boring position and the workable area around the wall 50 at the site. Further, the route of the buried conduit is confirmed in the buried conduit drawing, and the boring position is determined (step S2). At the site again, the RFID reader 20 is brought close to the wall surface 51 or the wall surface 52 of the concrete 40 shown in FIG. 1, and the presence / absence of the ID tag 10 (RFID) at the boring position is checked (step S3). When the ID tag 10 is not detected (step S3, No), it is determined that there is no buried conduit at the boring position, and the drilling is performed (step S4), and a new buried conduit is installed (finished) (step S5). )

  On the other hand, when the ID tag 10 is detected by the RFID reader 20 (Yes in step S3), the database server 30 uses the embedded conduit information (received from the ID tag 10 by the RFID reader 20) to the embedded conduit information ( (Conduit No., drawing information, etc.) are taken out and transmitted to the terminal 21. The processing unit of the terminal 21 displays the buried conduit path and the buried conduit related information on the display unit. The operator confirms the buried conduit related information (Step S6), and confirms the buried conduit position and installation direction (Step S7).

  Here, when the operator presses a peripheral information confirmation button (not shown) of the terminal 21, the terminal 21 transmits a peripheral information confirmation request (peripheral object confirmation request) to the database server 30. The database server 30 also searches the surrounding buried conduits from the already accepted buried conduit information, and transmits the buried conduit information of the corresponding buried conduit to the terminal 21. The accepted terminal 21 also displays the surrounding buried conduit information on the display unit. The operator confirms the position and route of the buried conduit and checks the surrounding locations where boring is possible (step S8). Here, if a place is found (step S8, Yes), boring is performed (step S4), and a new buried electric conduit is installed (completed) (step S5). On the other hand, if the location is not found (No in step S8), the process returns to step S2 and each procedure is performed again from the confirmation of the boring possible position area.

  FIG. 8 is an explanatory view showing a display example of the buried conduit path and the buried conduit related information on the terminal. On the display unit (terminal screen 22) of the terminal 21, the path of the buried conduit 101, the installation position of the received ID tag 10a, and the buried conduit related information are displayed. Here, not only the buried conduit 101 with the ID 10 a received by the RFID reader 20 but also the surrounding buried conduit 102 is displayed as the buried conduit path.

  Further, in the buried conduit related information, as shown by reference numeral 101a, the conduit number of the buried conduit 101, the rising position indicating the position where the buried conduit rises from the floor or wall and is exposed, and the buried conduit Information such as the cable number stored in is displayed. Also here, as shown by reference numeral 102a, the buried conduit related information of the surrounding buried conduit 102 is also displayed.

  In addition, the line type (power, control, measurement) of the cable can be determined from the storage cable number displayed here by collating with the cable list stored in the storage unit 32. In particular, in the case of power cables, there are cases where precautions are taken to turn off the power of the cables in preparation for an electric shock of the operator when the surrounding buried electric pipes and the stored power cables are accidentally damaged during boring. It is preferable to make an inquiry from the terminal 21 to the database server 30.

  In the embodiment described above, the object embedded in the reinforced concrete has been described as a conduit. However, the buried object is not necessarily limited to this conduit. For example, instruments may be used.

  According to this embodiment, when the database server 30 (management server) receives a request for confirmation of a peripheral object from the terminal 21, the database server 30 (management server) refers to the buried conduit table 321 (buried object information) and corresponds to the object identification information. The peripheral object is searched to obtain the position information of the surrounding object (for example, the route information of the buried conduit), and the position information of the surrounding object is transmitted to the terminal 21. The position information of the object is displayed.

  According to the present embodiment, the embedded object information includes room information (for example, a room number) partitioned by the wall 50 (partition wall) and position information of the object viewed from the room of the room information (for example, the path of the embedded conduit). When the room information and the identification information of the object read by the RFID reader 20 are received, the database server 30 (management server) identifies the position information of the object with reference to the embedded object information. It is characterized by doing.

  According to the present embodiment, the IC chip 13 attached to the buried pipe (for example, the buried electric pipe 100) buried in the reinforced concrete wall 50 (partition wall) is mounted and directivity is stored. The ID tag 10 having the antenna 14 (first antenna) is characterized by providing auxiliary antennas 11 and 12 (second antenna) extending to the positions of the concrete cover 41 on both sides of the partition wall.

10 ID tag 11, 12 Auxiliary antenna (second antenna)
13 IC chip 14 Directional antenna (first antenna)
20 RFID reader (tag reader)
21 terminal 30 database server (management server)
Reference Signs List 31 Communication Unit 32 Storage Unit 33 Processing Unit 40 Concrete 41 Concrete Cover 42 Reinforcing Bar 50 Wall 51, 52 Wall Surface 100 Buried Conduit 321 Buried Conduit Table (Bed Information)

Claims (6)

A management server having a storage unit for storing identification information of an object embedded in a partition wall made of reinforced concrete and position information of the object;
An ID tag having an IC chip attached to the object for storing identification information of the object and a first antenna;
A tag reader for reading the identification information of the object of the ID tag;
A terminal that transmits the identification information of the object read by the tag reader to the management server, receives the position information of the object from the management server, and displays the position information of the object on a display unit;
The said ID tag provides the 2nd antenna extended to the position of the concrete cover of the said partition wall. The embedded object position guidance system characterized by the above-mentioned. When the management server receives a request for confirmation of a peripheral object from the terminal, the management server refers to the embedded object information, searches for an object around the object corresponding to the identification information of the object, and positions information on the peripheral object And sending the position information of the surrounding objects to the terminal,
The said terminal displays the positional information on the said surrounding object on the said display part. The embedded object position guidance system of Claim 1 characterized by the above-mentioned. The buried object information is associated with room information partitioned by the partition wall and position information of the object viewed from the room of the room information,
The management server, when receiving the room information and the identification information of the object read by the tag reader, specifies the position information of the object with reference to the embedded object information. The buried object position guidance system described. The embedded object position guiding system according to any one of claims 1 to 3, wherein the object is a conduit, and the position information of the object includes a path of the conduit. . In an RFID tag attached to an embedded pipe embedded in a reinforced concrete wall and equipped with an IC chip for storing identification information of the embedded pipe and having a first antenna,
An RFID tag, comprising: a second antenna extending to a position of the concrete cover on the wall. In an RFID tag attached to an embedded pipe embedded in a reinforced concrete partition wall, mounted with an IC chip for storing identification information of the embedded pipe, and having a first antenna,
An RFID tag, comprising: a second antenna extending to the position of the concrete cover on both sides of the partition wall.

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