JP6089475B2 - Filling confirmation method of filling hardener - Google Patents

Description

The present invention relates to a method for confirming a filling and curing material, such as cement, mortar, and concrete, for confirming the filling state of a filling and curing material (such as grout) having fluidity and conductivity during construction.

  When constructing a structure or filling a gap between members to be joined, a filling hardened material is filled in a filling space defined by a mold or the like. Here, since wood or steel plate is used for the mold, it is difficult to visually check the filling state from the outside. For this reason, conventionally, a large amount of filling and curing material is filled into the filling space, while surplus filling and curing material is discharged from the filling space, and filling is completed based on the absence of bubbles in the discharged filling and curing material. Judging. In this method, the filling and curing material had to be filled wastefully.

  In the techniques of Patent Documents 1 and 2, concrete placement management is performed using RFID tags. Briefly, an RFID tag is affixed to the inner surface of the formwork, and if concrete is filled into the formwork, the RFID tag cannot communicate with the outside to determine whether or not concrete is filled. Judgment from the outside.

JP 2006-299604 A JP 2006-309410 A

  Some RFID tags can communicate with the outside even if they are embedded in a filling and hardening material. When the techniques of Patent Documents 1 and 2 are implemented using such an RFID tag, there is a possibility that it may be erroneously recognized as unfilled even though it is already filled. Also, since the RFID tag is on the condition that communication is impossible, if the RFID tag is out of order, it may be erroneously detected that it is filled even though it is unfilled. .

  This invention is made | formed in view of such a situation, The objective is to suppress generation | occurrence | production of a misdetection and to detect the filling state of a filling hardening material accurately.

In order to achieve the above object, the present invention provides a chip in which information necessary for notification is stored, an antenna that transmits and receives radio signals, a conductor that electrically connects the chip and the antenna, the antenna, divided at least one of the conductors, the RFID tag having a possible slit filling cured material flows, filler cured material having a fluidity and conductivity during construction is arranged in the filling space is filled it,
Filling the filling space in which the RFID tag is disposed with the filling hardening material;
When the radio signal is transmitted from the outside of the filling space, the radio signal transmitted from the antenna is in a state where the radio signal can be received, and when the transmitted radio signal is received, the filling and curing material becomes the RFID. It is determined that the tag has been filled up to the placement position.

  According to the present invention, when the filled hardened material flows into the slit, wireless communication becomes possible, and a wireless signal transmitted from the antenna can be received. On the other hand, since wireless communication cannot be performed in a state where the slit is divided, no wireless signal is transmitted from the antenna. Thus, the filling state of the filling and hardening material can be confirmed from the outside according to the presence or absence of a radio signal from the antenna.

In the above-described filling confirmation method, the RFID tag includes a base sheet on which the chip, the antenna, and the conductor are formed on one side, and a formation surface of the chip, the antenna, and the conductor on the base sheet. And the slit is formed by partially cutting the coating layer and at least one of the antenna and the conductor, and the base sheet is attached to the RFID tag. It is preferable to dispose the filling space in close contact with the section screen. In this case, the filling and curing material is hardly attached to the base sheet side, so that a sufficient radio communication distance of the RFID tag can be ensured.

  In the above-described filling confirmation method, the filling space is preferably a space formed between the column member and the joint portion when the precast concrete column member is joined to the joint portion. If it does in this way, the filling state of filling hardening material can be checked with sufficient accuracy about the joined portion of precast concrete.

  According to the present invention, since erroneous detection can be suppressed, the filling state of the filling hardened material into the filling space can be accurately detected.

It is explanatory drawing of a RFID tag, (a) is a front view, (b) is sectional drawing, (c) is the X section enlarged view of (b), (d) is the X section enlarged view in the filling state of grout. . It is a figure explaining the junction part of precast concrete. It is a figure explaining the state which attached the formwork and the RFID tag. It is the figure which looked at the state which attached the formwork and the RFID tag from the lower side. It is explanatory drawing of a grout filling operation | work and is a figure explaining the state filled with grout. It is explanatory drawing of a grout filling operation | work and is a figure explaining the confirmation operation | work with respect to a lower side filling space. It is explanatory drawing of a grout filling operation | work and is a figure explaining the confirmation operation | work with respect to an upper side filling space.

  Hereinafter, embodiments of the present invention will be described. FIG. 1 is a diagram illustrating an RFID tag 10 used in this embodiment. The RFID tag 10 transmits and receives 900 MHz band radio signals.

  As shown in FIGS. 1A and 1B, the RFID tag 10 includes a chip 11, an antenna 12, a conductor 13, a base sheet 14, and a coating layer 15.

  The chip 11 is an integrated circuit in which information necessary for notification is stored, and includes, for example, a transmission / reception unit, a control unit electrically connected to the transmission / reception unit, and a memory that stores information necessary for the operation of the control unit. (Both not shown). The chip 11 operates by obtaining power from the radio signal received by the antenna 12.

  The transmission / reception unit is a part that transmits and receives signals to and from the antenna 12 and includes a demodulator that converts an analog signal based on a radio signal into a digital signal and a modulator that converts a digital signal into an analog signal. The transmission / reception unit converts an analog signal from the antenna 12 into a digital signal and transmits the digital signal to the control unit, or converts a digital signal from the control unit into an analog signal and transmits the analog signal to the antenna 12.

  The control unit operates based on the digital signal received from the transmission / reception unit, and outputs the digital signal to be transmitted to the transmission / reception unit. For example, when the received digital signal is a request for identification information, the identification information is read from the memory and output to the transmission / reception unit. If the received digital signal is a test date write request, the test date information included in the digital signal or the date information acquired by the control unit is written in the memory.

  The memory is a part that stores information necessary for the operation of the control unit. In this memory, for example, unique identification information for identifying each RFID tag 10, information on the inspection date and time, and the like are stored.

  The antenna 12 is a part that receives a radio signal transmitted from the RFID reader RD (see FIG. 4) and transmits a radio signal to the outside (RFID reader RD). The antenna 12 of this embodiment is configured by a dipole antenna. For this reason, it is symmetrical from the center in the longitudinal direction. The antenna 12 is formed of a metal thin film and is formed on one surface (referred to as a front surface for convenience) of the base sheet 14. And this antenna 12 arrange | positions the folding shape which made the question mark squared so that it may become symmetrical in a longitudinal direction.

  The conductor 13 is a conductive member that electrically connects the chip 11 and the antenna 12. The conductor 13 is formed of a metal thin film as in the antenna 12. The conductor 13 is the front surface of the base sheet 14 and extends in the longitudinal direction of the antenna 12. It is formed at the center. The conductor 13 has a thin line shape bent in a substantially rectangular shape, and a chip 11 is provided in the middle thereof.

  The base sheet 14 is a sheet-like member having the above-described insulating properties on which the chip 11, the antenna 12, and the conductor 13 are formed. The base sheet 14 of this embodiment is produced by cutting a resin film having water resistance and chemical resistance into a horizontally long rectangular shape. And the adhesion layer is produced | generated in the back surface of this base sheet 14, and it is comprised so that it can be used as a seal | sticker.

  The covering layer 15 covers the chip 11, the antenna 12, and the conductor 13 formed on the front surface of the base sheet 14. The coating layer 15 of this embodiment is composed of a transparent resin film having water resistance and chemical resistance.

  The RFID tag 10 is formed with a slit SL. As shown in FIG. 1C, the slit SL is formed by partially cutting the covering layer 15 and the antenna 12 and divides the antenna 12. That is, a portion of the antenna 12 outside the slit SL (portion far from the chip 11) is electrically insulated from the chip 11. Thereby, the transmission / reception sensitivity of a radio signal is reduced.

  In addition, as shown in FIG. 1D, the slit SL is a space into which grout GR as a filling and hardening material flows. Since the grout GR has fluidity and conductivity at the time of construction, when the grout GR flows into the slit SL, the entire antenna 12 is conducted. That is, the entire antenna 12 can transmit and receive radio signals. Thereby, the transmission / reception sensitivity of the radio signal is improved as compared with the divided state.

  In the above, the example in which the antenna 12 of the RFID tag 10 is divided has been described. However, the conductor 13 may be divided. In this case, for example, the portion of the conductor 13 indicated by symbol Y in FIG. Further, both the antenna 12 and the conductor 13 may be divided, or a plurality of locations of the antenna 12 and the conductor 13 may be divided.

  And when the communication distance confirmation test was performed about the RFID tag 10 which divided | segmented the antenna 12 and the conductor 13, the state which divided at least one of the antenna 12 and the conductor 13 with the slit SL, and the state which filled grout GR in the division part It was confirmed that the communication distance changed. The degree of change in the communication distance was such that it was sufficiently distinguishable between the state where the grout GR was not filled and the state where it was filled.

  Further, when the case where the antenna 12 is divided and the case where the conductor 13 is divided are compared, the communication distance when the grout is not filled is longer when the antenna 12 is divided. When the conductor 13 is divided, the communication distance is extremely short. These facts indicate that the part to be divided can be selected according to the purpose of use. For example, it is preferable to divide the conductor 13 when the grout GR filling confirmation is performed within a distance of 1 m or less, and it is preferable to divide the antenna 12 when the distance is about 2 m to 4 m.

  Next, a grout GR filling detection method using the filling detection apparatus will be described. Here, the description will be given by taking as an example the joining of the precast concrete member (PCa member) shown in FIG. The PCa member includes a joint member 21, a left beam member 22, a right beam member 23, an upper column member 24, and a lower column member 25. An upper joint portion 26 is provided between the lower surface of the upper column member 24 and the upper surface of the joint member 21, and a lower joint portion 27 is provided between the upper surface of the lower column member 25 and the lower surface of the joint member 21. .

  As shown in FIG. 3, when connecting the upper column member 24 and the lower column member 25, a reinforcing bar 24 a protruding downward from the lower surface of the upper column member 24 is connected to a reinforcing bar through hole provided in the joint member 21. 21a is inserted. In addition, the lower end side portion of the reinforcing bar 24 a protruding downward from the lower surface of the joint member 21 is inserted into the reinforcing bar joint portion 25 a provided on the upper surface of the lower column member 25. At this time, a slight space is formed between the lower surface of the upper column member and the upper surface of the joint member, and this space is filled with the grout GR to form the upper joint portion 26. Similarly, a slight space is also formed between the upper surface of the lower column member and the lower surface of the joint member, and this space is filled with grout GR to form the lower joint portion 27.

  Therefore, the upper space corresponding to the upper joint portion 26 and the lower space corresponding to the lower joint portion 27 correspond to the filling space filled with the grout GR, respectively. The aforementioned RFID tag 10 is arranged in these filling spaces. Further, in order to densely fill the grout GR with these filling spaces, the lower column member 25 is provided with a grout GR injection path 25b, and the upper column member 24 is provided with a grout GR discharge path 24b. . In this configuration, the grout GR is filled in order from the lower space while discharging air from the discharge path 24b.

  When these grout spaces are filled with grout GR, the RFID tag 10 is first attached. In this case, for example, as shown in FIG. 4, the plurality of RFID tags 10 are attached to the lower surface of the upper column member 24 in a state of being dispersed in the surface direction. Also, the RFID tag 10 is attached to the lower surface of the joint member 21 in the same manner as in the example of FIG.

  At that time, the base sheet 14 is pasted in a state in which the back surface of the base sheet 14 is in close contact with the lower surface of the upper column member 24 or the joint member 21 (corresponding to a section screen that partitions the filling space). If it does in this way, since it becomes difficult for grout GR to penetrate | invade into the back surface side of the base sheet 14, the excessive attenuation | damping of a radio signal can be suppressed and required communication distance can be ensured easily.

  When the members such as the joint member 21 are assembled, the mold 31 is installed to fill the grout GR. The RFID tag 10 is also attached to the inner surface (corresponding to a section screen) of the mold 31. Here, too, the base sheet 14 is pasted in a state where the back surface is in close contact with the inner surface. Thereby, infiltration of grout GR can be suppressed and a necessary communication distance can be easily secured.

  And when attaching each RFID tag 10, the attachment position and identification information (unique number) of each RFID tag 10 are recorded. Thereby, the filling state of grout GR can be confirmed based on the acquired identification information.

  If the formwork 31 is installed, the grout GR is filled. As described above, the grout GR is filled through the injection path 25 b provided in the lower column member 25. If a specified amount of grout GR is filled in each filling space, for example, as shown in FIG. 5, if the discharge path 24b provided in the upper column member 24 is filled with grout GR, injection of grout GR is stopped. To do. And the filling state of grout GR is confirmed.

  The filling check of the grout GR is performed by reading information from the RFID tag 10 by the RFID reader RD. For example, when confirming the filling state of the grout GR in the lower filling space, as shown in FIG. 6, an RFID reader RD is arranged outside the lower filling space, and a radio signal is transmitted. Similarly, when confirming the filling state of the grout GR in the upper filling space, as shown in FIG. 7, an RFID reader RD is arranged outside the upper filling space, and a radio signal is transmitted.

  Here, when the conductive grout GR is filled in the slit SL of the RFID tag 10, the antenna 12 or the conductor 13 is conducted by the grout GR, so that the radio signal from the RFID reader RD is received, A wireless signal (reply signal) including identification information can be transmitted. On the other hand, when the grout GR is not filled, the transmission / reception sensitivity with respect to the radio signal is lowered as described above, so that radio communication (transmission / reception of radio signal) with the RFID reader RD is difficult. Therefore, when the RFID reader RD displays the identification information, it can be seen that the grout GR is filled up to the RFID tag 10. Further, it can be seen that the RFID tag 10 whose identification information is not displayed by the RFID reader RD is not filled with the grout GR.

  As described above, the RFID tag 10 communicates and notifies the identification information on the condition that the grout GR filled in the filling space flows into the slit SL. It is possible to prevent malfunctions to be detected. In addition, since communication cannot be performed when the RFID tag 10 fails, it is possible to prevent a problem of erroneous detection of being filled. As a result, it is possible to accurately detect the filling state of the grout GR.

  In addition, regarding the RFID tag 10 attached to the lower surface of the upper column member 24 and the RFID tag 10 attached to the mold 31, the former communication distance is longer than the latter communication distance. Therefore, the RFID tag 10 attached to the lower surface of the upper column member 24 is divided by providing the antenna 12 with the slit SL, and the RFID tag 10 attached to the mold 31 is divided by providing the conductor 13 with the slit SL. May be. With this configuration, erroneous detection can be prevented more reliably.

  Further, in the RFID tag 10 of the present embodiment, since the chip 11, the antenna 12, and the conductor 13 are sandwiched between the base sheet 14 and the covering layer 15, damage to each member such as the chip 11 can be prevented. . Further, since the slit SL is provided by partially cutting the covering layer 15 and the antenna 12 and the like, it is easy to adjust the width and length of the slit SL, and the conduction state is ensured when the grout GR flows in. Can be secured.

  The above description of the embodiment is for facilitating the understanding of the present invention, and does not limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof. For example, you may comprise as follows.

  In the above-described embodiment, the configuration in which the identification information is displayed by the RFID reader RD has been described as an example. However, the inspection date and time may be stored in the memory of the chip 11. With this configuration, the inspection history can be read out at a later date.

  Regarding the RFID tag 10, the frequency of the radio signal is not limited to the 900 MHz band. For example, it may be a 2.45 GHz band. Further, the antenna is not limited to a dipole antenna, and may be an electromagnetic induction loop antenna.

  In the above-described embodiment, the configuration in which the RFID reader RD is moved and the identification information is read is described as an example. However, the stationary RFID reader 10 is used to connect all the RFID tags 10 attached to the filling space. You may comprise so that a radio signal may be transmitted / received between. In this configuration, if the pump (not shown) that pumps the grout GR is automatically stopped on condition that the identification information has been received from all the RFID tags 10, wasteful discharge of the grout GR can be minimized. it can.

  Moreover, grout GR was illustrated in the above-mentioned embodiment regarding the filling hardening material with which filling space is filled. About this filling hardening material, various things, such as resin-made hardening materials, can be used. That is, the present invention can be applied to any filling and curing material that has fluidity and conductivity during construction and is cured after filling.

  Regarding the filling object of grout GR (filling hardening material), it is not restricted to the junction part of a PCa member. For example, it may be a gap between the reinforcing plate wound around the concrete pillar and the concrete pillar. In other words, the present invention can be applied to the case where the filling and hardening material is filled in the gap between the members.

DESCRIPTION OF SYMBOLS 10 ... RFID tag, 11 ... Chip, 12 ... Antenna, 13 ... Conductor, 14 ... Base sheet, 15 ... Cover layer, 21 ... Joint member, 21a ... Reinforcing bar through hole, 22 ... Left beam member, 23 ... Right beam member, 24 ... Upper column member, 24a ... Reinforcing bar, 24b ... Discharge path, 25 ... Lower column member, 25a ... Reinforcement joint part, 25b ... Injection path, 26 ... Upper joint part, 27 ... Lower joint part, 31 ... Formwork, SL ... slit, GR ... grout, RD ... RFID reader

Claims (3)

Notification and chip information is stored required, an antenna for transmitting and receiving radio signals, and a conductor for electrically connecting the said chip antenna, divided at least one of said antenna and said conductor, Filling An RFID tag having a slit into which a hardener can flow is disposed in a filling space filled with a filling hardener having fluidity and conductivity during construction.
Filling the filling space in which the RFID tag is disposed with the filling hardening material;
When the radio signal is transmitted from the outside of the filling space, the radio signal transmitted from the antenna is in a state where the radio signal can be received, and when the transmitted radio signal is received, the filling and curing material becomes the RFID. A filling confirmation method for filling hardened material, characterized in that it is determined that the tag has been filled up to the arrangement position. The RFID tag has a base sheet on which the chip, the antenna, and the conductor are formed on one side, and a covering layer that covers the chip, the antenna, and the conductor on the base sheet. The slit is formed by partially cutting the covering layer and at least one of the antenna and the conductor,
2. The filling confirmation method for filling hardening material according to claim 1, wherein the RFID tag is disposed in a state in which the base sheet is in close contact with a section screen that partitions the filling space.   The filling hardening material according to claim 1, wherein the filling space is a space formed between the column member and the joint portion when the precast concrete column member is joined to the joint portion. Filling confirmation method.

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