JP2006309410A - Casting status monitoring method, casting status monitoring device, casting status monitoring program, and mold form - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply and efficiently check a casting status of concrete in a mold form. <P>SOLUTION: The method for monitoring the casting status of the concrete in a mold form executes the following processes: a process in which RFID tags 20 are installed at prescribed positions on the concrete-casting face side of the mold form 10, a process in which the RFID tags 20 are read by a tag reader 150 and whether communication between the tag reader 150 and the RFID tags 20 is possible is detected, and a process in which a position of an RFID tag 20 which cannot communicate with the tag reader 150 is recognized to be a concrete-existing position in the mold form. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a placement situation monitoring method, a placement situation monitoring apparatus, a placement situation monitoring program, and a formwork.

  As a technique for confirming the concrete placement condition, for example, a technique has been proposed in which an electrode bar is inserted from the outside of the formwork toward the placement space. In this technology, when the top of the concrete gradually fills the formwork by being placed in the formwork and the electrode stick, the concrete moisture or the like is used as a conduction path between the electrode sticks. It captures the phenomenon of current flow and sets it as a detection event for the placement situation (see Non-Patent Document 1).

  On the other hand, as a concrete quality control technique for concrete, a technique has been proposed in which an RFID tag is embedded in a concrete test piece. For example, an RFID tag that can be used by being embedded in a concrete test piece, a concrete test piece in which the tag is embedded, its manufacturing method, and an antenna coil and capacitor for the purpose of providing an RFID system for concrete quality control A flat RFID tag including a resonance circuit and an IC chip, wherein the antenna coil is formed by etching a rolled copper foil on an insulating film, and the RFID tag is a concrete test piece. An RFID tag (see Patent Document 1), which is characterized in that it is used by being embedded in a device, has been proposed.

In addition, as a technology related to the RFID tag, for example, an antenna coil can be operated even if it is in close contact with a metal plate, and can be formed relatively thin, and the portability is not impaired. IC chip that is attached to the plate and stores unique information that is different for each plate (11, 31, 51) on which the person or the article is identified and is adhered to the plate (11, 31, 51) In the ID tag comprising (13) and an antenna coil (14, 74) electrically connected to the IC chip (13) and bonded to the plate (11, 31, 51), the antenna coil (14, 74) is a magnetic core member (14a, 74a) formed of a magnetic material in a flat plate shape, and the magnetic core so as to surround the outer peripheral edge of the magnetic core member (14a, 74a). A coil body (14b, 74b) wound spirally on the same plane as the material (14a, 74a), the plate (11, 31, 51) is formed of a metal plate, and the IC chip ( 13) ID tags (see Patent Document 2) characterized in that 13) is bonded to the surface of the magnetic core members (14a, 74a).
Abstracts of Annual Meeting of Architectural Institute of Japan (Tohoku), p161-p162, September 1991 JP 2004-109002 A JP 2001-56847 A

  However, according to the prior art, in a situation where the form of the assembled form and the contact with the structure around the form vary depending on the concrete placement site, the electrode rod is inserted into the form, and further There is a concern that workability on site and work time may be increased, for example, it is necessary to attach a connection cord to the electrode rod. In addition, the connecting cords installed with such labor may become obstacles during various operations such as actual concrete placing work and mold removal work, and it will also become an obstacle to on-site management. It could have been. In addition, as described above, the form of the form and the relationship with the structure around the form are various depending on the concrete placement site, and the form, the number of installations, and the installation positions where the electrode rods can be installed It was also assumed that it would be difficult to set these freely. Therefore, it cannot be said that the application range is wide as a technique for confirming the concrete pouring situation.

  Therefore, the present invention has been made paying attention to such a problem, and it is possible to easily and efficiently confirm a concrete placement condition in a formwork, a placement condition monitoring method, a placement condition monitoring device, and a placement technique. The purpose is to provide a situation monitoring program and formwork.

  The placing condition monitoring method of the present invention that achieves the above object is a method for monitoring the placing condition of concrete in a formwork, and the step of installing an RFID tag at a predetermined position on the concrete placing surface side of the formwork And a step of performing a reading process on the RFID tag by a tag reader to detect whether the tag reader and the RFID tag can communicate with each other, and an installation position of the RFID tag that cannot communicate with the tag reader is determined in a concrete frame. And recognizing the existence position.

  In the placement status monitoring method of the present invention, it is preferable that the RFID tag has a metal layer or a conductor layer provided on the back surface of the antenna.

  In the placing condition monitoring method of the present invention, when the RFID tag is installed on the concrete placing surface side of the mold, it is preferable that the antenna back side of the RFID tag is opposed to or abuts the mold. It is.

  The placement status monitoring device of the present invention is a device for monitoring the concrete placement status in the formwork, and is a result of a reading process relating to an RFID tag installed at a predetermined position on the concrete placement surface side of the formwork. Is acquired from the tag reader that has performed the reading process, and a communication status detection unit that detects whether the tag reader and the RFID tag are communicable based on a result of the reading process, and an installation position of the RFID tag that cannot communicate with the tag reader And a placement position recognizing unit for recognizing the concrete presence position in the formwork.

  Further, the placement status monitoring program of the present invention is a program for causing a computer to monitor the concrete placement status in the mold, and is installed at a predetermined position on the concrete placement surface side of the mold. A reading process result related to the RFID tag is obtained from the tag reader that has executed the reading process, and a step of detecting whether or not the tag reader and the RFID tag can communicate based on the reading process result; and an RFID tag that cannot communicate with the tag reader And recognizing the installation position of the concrete position as the concrete existing position in the formwork.

  The formwork of the present invention is a formwork for monitoring the concrete placement condition, and includes an RFID tag at a predetermined position on the concrete placement surface side.

  In addition, the problems disclosed by the present application and the solutions thereof will be clarified by the embodiments of the present invention and the drawings.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to confirm the concrete placement condition in a formwork simply and efficiently.

  Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a system schematic diagram including a placement status monitoring apparatus 100 according to the present embodiment. In the present embodiment, the concrete 30 to be subjected to the placement status monitoring is placed in the mold 10 by an appropriate conveying means such as the tremy pipe 15. This formwork 10 is, for example, a non-metallic dam plate 11 (or a curtain plate struck against a pier) combined with the outer shape of the frame, and is fixed with a horizontal cover 9 and a vertical cover 12. It becomes. Moreover, the said formwork 10 is made from the reaction force from the ground 5 with the cutting beam 8 installed in the plate 7 on the said steel sheet pile 6 in the construction space which excavated the ground 5 and was retained with the steel sheet pile 6, for example. Fixed. Further, the distance between the non-metallic dam plates 11 is adjusted and maintained by the separator 13 according to the thickness of the casing.

  The placement status monitoring apparatus 100 (hereinafter, monitoring apparatus 100) of the present invention that executes placement status monitoring in such a situation should realize the function of executing a process by computer processing in the placement status monitoring method of the present invention. The program 102 stored in the program database 101 such as a rewritable memory is read into the memory 103 and executed by the CPU 104 which is an arithmetic device. As an example, a PDA (Personal Digital Assistant) including a tag reader 150 for the RFID tag 20 can be assumed.

  The monitoring device 100 is connected to an input / output interface 105 such as various keyboards and buttons, a display, etc., which are generally provided in a computer device, and a server 200 provided in a construction office or the like that performs concrete placing work. The communication means 106 responsible for data transmission / reception is provided. In the present embodiment, the monitoring device 100 is assumed to be an information terminal (eg, a PDA or a laptop computer) carried by a person in charge of placement status monitoring at the time of monitoring execution. Any information terminal can be used as long as it has the necessary functions and can be carried by the tester.

  The monitoring device 100 is connected to the server 200 and the like via the network 140 such as the Internet by the communication means 106, and exchanges the result of placing status monitoring. Between the various functional units of the monitoring apparatus 100 and the communication means 106, the I / O unit 107 performs data buffering and various mediation processes.

  The server 200 is also a computer, which reads out a program stored in a program database such as a rewritable memory into the memory and executes it by the CPU as an arithmetic unit. In addition, the computer apparatus generally includes an input / output interface that is generally provided, and a communication unit that performs data exchange with the monitoring apparatus 100. Further, the I / O unit performs data buffering and various mediation processing between the various functional units and the communication means.

Next, functional units configured and held by the monitoring apparatus 100 based on the program 102 will be described.
The monitoring device 100 acquires a reading process result regarding the RFID tag 20 installed at a predetermined position on the concrete placing surface side of the mold 10 from the tag reader 150 that has executed the reading process, and based on the reading process result. The communication status detection unit 110 detects whether communication is possible between the tag reader 150 and the RFID tag 20.
In addition, the monitoring apparatus 100 includes a placement position recognition unit 111 that recognizes the installation position of the RFID tag 20 that cannot communicate with the tag reader 150 as the concrete existing position in the mold 10.

  The functional units 110 and 111 in the monitoring apparatus 100 described so far may be realized as hardware, or as a program stored in an appropriate storage device such as a memory or an HDD (Hard Disk Drive). Also good. In this case, the CPU 104 reads the corresponding program from the storage device into the memory 103 and executes it in accordance with the execution of the program.

  In addition to the Internet and LAN, the network 140 includes various types such as an ATM line, a dedicated line, a WAN (Wide Area Network), a power line network, a wireless network, a public line network, a mobile phone network, and a serial interface communication line. A network can also be adopted. If a virtual private network technology such as VPN (Virtual Private Network) is used, communication with improved security is established when the Internet is adopted. The serial interface refers to an interface for connecting to an external device by serial transmission that sequentially transmits data bit by bit using a single signal line, and RS-232C, RS-422, IrDA, USB, IEEE 1394, fiber channel, etc. can be assumed.

--- RFID tag ---
Next, the RFID tag 20 in the present embodiment will be described. FIG. 2 is a diagram illustrating a structure example of an RFID tag in the present embodiment. The RFID tag 20 in the present embodiment is formed by molding, for example, an IC chip 21 and an antenna 22 connected thereto with a resin or other appropriate member, and is used for communication with the tag reader 150 as an example. The frequency band is 2.45 GHz (of course, other frequency bands may be used if the present invention can be realized).

  As shown in FIG. 2A, the IC chip 21 includes a CPU 25, a RAM 26, a ROM 27, and an EEPROM 28. The RAM 26 is a volatile memory, and is used when temporary data is stored during calculation by the CPU 25. The ROM 27 is a non-volatile memory, and stores a program describing various arithmetic processing contents including communication processing with the tag reader 150 as the RFID tag 20. The EEPROM 28 is a rewritable and non-volatile memory and is used for data storage.

  As shown in FIG. 2B, the RFID tag 20 in the present embodiment employs a metal layer 23 (or a conductor layer) provided on the back surface of the antenna 22. In the RFID tag 20 provided with such a metal layer 23, the antenna 22 is adjusted in advance so that an optimum communication distance can be ensured regardless of the presence or absence of a metal material on the back surface of the metal layer 23. This is because when the RFID tag 20 is installed on the concrete placing surface side of the mold 10, the rear surface side of the antenna of the RFID tag 20 is opposed to the mold 10 by a predetermined distance (FIG. 3A), or In the case of contact (FIG. 3B), it is the same in any case.

  On the other hand, the RFID tag 20 (antenna back side) and the tag reader 150 cannot communicate with each other in water, not in the air, or in a material having a high water content such as concrete immediately after placing. Therefore, in the present invention, by specifying the RFID tag 20 that cannot communicate with the tag reader 150, the installation position of the RFID tag 20 can be recognized as the concrete existing position in the mold.

  Next, data stored in the RFID tag 20 will be described. FIG. 4 is a diagram illustrating an example of data stored in the RFID tag according to the present embodiment. The stored information of the RFID tag 20 is, for example, a collection of records in which the tag ID is used as a key and information such as the ID of the installation target mold 10 and information on the installation position in the mold 10 is associated.

-Test method-
Hereinafter, the actual procedure of the placement status monitoring method according to the present embodiment will be described with reference to the drawings. Of the various operations corresponding to the placement situation monitoring method described below, what is executed by a computer is realized by the program 102 that the placement situation monitoring apparatus 100 reads into the memory 103 and executes. And this program 102 is comprised from the code | cord | chord for performing the various operation | movement demonstrated below.

  FIG. 5 is a flowchart showing a processing example of the placement status monitoring method in the present embodiment. In this flow, first, a predetermined person in charge or an installation device or the like installs the RFID tag 20 at a predetermined position on the concrete placing surface side of the mold 10 (S1000). As this installation position, an installation point at a predetermined interval in the formwork 10, a place where it is difficult to visually monitor the concrete placement situation, a place where it is necessary to quickly know the placement situation, and the like can be assumed.

  Next, the monitoring device 100 executes a reading process by the tag reader 150 on the RFID tag 20 (S1001), and detects whether the tag reader 150 and the RFID tag 20 can communicate (S1002). In this case, as shown in FIGS. 6A and 6B, when the RFID tag 20 is not buried in the concrete 30, the RFID tag 20 exists in the air as described above. Communication with is possible. Therefore, the monitoring apparatus 100 recognizes that these RFID tags 20 are communicable RFID tags. On the other hand, as shown in FIG. 6C, when the formwork 10 is filled with concrete 30 and the RFID tag 20 is also buried in the concrete 30, the RFID tag 20 is concrete immediately after placing. In other words, it exists in a substance containing a lot of moisture, and communication with the RFID tag 20 is impossible. Therefore, the monitoring apparatus 100 recognizes that these RFID tags 20 are RFID tags that cannot communicate.

  FIG. 7 is a diagram showing the communication status of the RFID tag under various conditions. As in the example shown in this figure, communication with the tag reader 150 on the rear side of the antenna is impossible in the aquarium or in the ready-mixed concrete for both the metal-compatible RFID tag 20 provided with the metal layer 23 and the thin RFID tag 20. It has become. On the other hand, in the air or in the concrete after curing, communication between the RFID tag 20 and the tag reader 150 is possible even on the back side of the antenna (however, the RFID tag 20 and the tag reader 150 in the concrete after curing are The communication distance is greatly reduced compared to the communication distance in the air or on the antenna front side).

  Subsequently, the monitoring apparatus 100 identifies the RFID tag 20 that cannot communicate with the tag reader 150 (S1003), and recognizes the installation position of the RFID tag 20 in the mold 10 as the concrete existing position in the mold ( S1004). This process is assumed to be a situation where an appropriate person in charge holds the monitoring device 100 over the mold 10 and recognizes a place where communication with the RFID tag 20 is impossible as a concrete presence position, that is, a placement completion position.

  However, for example, the storage information such as the tag ID of the RFID tag 20 that can communicate with the tag reader 150, the ID of the installation form, and the information of the installation position is collated with a database in which the storage information of all the RFID tags 20 is aggregated. The monitoring apparatus 100 can also recognize that the RFID tag 20 that cannot be collated by this processing is an RFID tag that cannot be communicated. In this case, the monitoring apparatus 100 can acquire the form ID and the installation position information set for the RFID tag 20 recognized here from the database, and display them on the output interface.

  According to the present invention, by placing the RFID tag 20 at a location where visual confirmation of the placement status is difficult, it is possible to simply and reliably monitor the placement status for such locations where visual confirmation is difficult. As a result, it is possible to suppress the occurrence of problems such as construction defects and improve the construction quality and efficiency.

  Therefore, it is possible to easily and efficiently confirm the concrete placement state in the formwork.

  As mentioned above, although embodiment of this invention was described concretely based on the embodiment, it is not limited to this and can be variously changed in the range which does not deviate from the summary.

It is a system outline figure containing the placement situation monitoring device in this embodiment. It is a figure which shows the structural example of the RFID tag in this embodiment. It is a figure which shows the example of installation of the RFID tag in this embodiment. It is a figure which shows the example of storage data of the RFID tag in this embodiment. It is a flowchart which shows the process example of the placement condition monitoring method in this embodiment. It is a figure which shows the example of a communication condition of the RFID tag and tag reader in this embodiment. It is a figure which shows the communication condition of the RFID tag on various conditions.

Explanation of symbols

DESCRIPTION OF SYMBOLS 5 Ground 6 Steel sheet pile 7 Dish plate 8 Cut beam 9 Horizontal 10 Formwork 11 Nonmetallic dam 12 Vertical vertical 13 Separator 15 Tremy tube 20 RFID tag 21 IC chip 22 Antenna 23 Metal layer, Conductive layer 25 CPU 26 RAM
27 ROM 28 EEPROM
30 Concrete 100 Placing Status Monitoring Device 101 Program Database 102 Program 103 Memory 104 CPU 105 Input / Output Interface 106 Communication Means 107 I / O Unit 110 Communication Status Detection Unit 111 Placing Position Recognition Unit 150 Tag Reader 200 Server

Claims (6)

A method for monitoring the placement of concrete in a formwork,
Installing an RFID tag at a predetermined position on the concrete placement surface side of the mold,
Performing a reading process with a tag reader on the RFID tag, and detecting whether the tag reader and the RFID tag can communicate with each other;
Recognizing the installation position of the RFID tag that is incapable of communication with the tag reader as the concrete existing position in the mold,
A placement status monitoring method. In claim 1,
The RFID tag is provided with a metal layer or a conductor layer on the back surface of an antenna. In claim 2,
A placement condition monitoring method, wherein when the RFID tag is installed on a concrete placement surface side of a mold, the antenna rear surface side of the RFID tag is opposed or brought into contact with the mold. A device for monitoring the placement of concrete in a formwork,
A reading process result related to the RFID tag installed at a predetermined position on the concrete placing surface side of the mold is obtained from the tag reader that has executed the reading process, and communication between the tag reader and the RFID tag is performed based on the reading process result. A communication status detector that detects whether it is possible;
A placement position recognition unit for recognizing the installation position of the RFID tag that cannot communicate with the tag reader as a concrete existing position in the mold;
A placement status monitoring device. A program for causing a computer to monitor the concrete placement status in a formwork,
A reading process result related to the RFID tag installed at a predetermined position on the concrete placing surface side of the mold is obtained from the tag reader that has executed the reading process, and communication between the tag reader and the RFID tag is performed based on the reading process result. Detecting whether it is possible;
Recognizing the installation position of the RFID tag that is incapable of communication with the tag reader as a concrete existing position in the mold,
Installation status monitoring program. A formwork for monitoring a concrete placement condition, comprising a RFID tag at a predetermined position on the concrete placement surface side.

Images