JP2022074683A - Embedded hardware position detection method and embedded hardware position detection device - Google Patents

Abstract

To detect an embedded position of embedded hardware in a plane direction of a panel without damaging the panel in order to expose an opening part of the embedded hardware which is embedded into a concrete panel such as an ALC panel on a panel surface.SOLUTION: An embedded hardware position detection method for detecting a position of embedded hardware 2 embedded into a concrete panel 3 includes: a scanning process st1 for scanning a range in the vicinity of an estimated embedded position of the embedded hardware 2 on a surface of the concrete panel 3 by a magnetism sensor 11; a circular region specification process st2 in which the magnetism sensor 11 specifies a circular region surrounded by a boundary line between a range in which magnetism generated from the embedded hardware 2 is detected, and a range in which the magnetism is not detected; and an embedded position determination process st3 for determining that a center position of the circular region as an embedded position of the embedded hardware 2 in a plane direction of the concrete panel 3.SELECTED DRAWING: Figure 2

Description

The present invention relates to an embedded metal position detecting method for detecting an embedded position of an embedded metal embedded inside a concrete panel such as a lightweight cellular concrete (ALC) panel, and an embedded metal position detecting device.

For example, in order to expose the opening (nut portion) of the embedded metal fitting (see Patent Document 1) embedded inside a concrete panel such as a lightweight cellular concrete (ALC) panel to the panel surface, drilling is performed with a drill or the like. Is being done. Since the position of the embedded metal cannot be visually recognized from the outside of the panel, the work of estimating the drilling position based on the design value related to the embedded position of the metal in the panel and drilling is performed.

However, in reality, even if drilling is performed at the position according to the design value, the drilling position and the nut position do not exactly match due to an error in the design value, and the above-mentioned opening is not properly exposed. Was there. In order to eliminate such a problem, a means for accurately detecting the buried position of the opening of the embedded metal piece before drilling into the concrete panel has been sought.

As a technical means for searching the position of a buried object inside a concrete structure, for example, a method of inserting a detection rod equipped with a metal sensing sensor into a preliminary hole to search for reinforcing bars arranged in the concrete structure. (See Patent Document 2) and a method of inserting an ECT sensor into a drilling hole made in a concrete structure (see Patent Document 3) are known. However, all of these are technologies in which it is essential to separately form holes necessary only for searching in the structure to be searched, and for building materials that are not allowed to damage the panel, etc. Difficult to apply to concrete panels.

Japanese Unexamined Patent Publication No. 2000-248636 Japanese Unexamined Patent Publication No. 2007-178365 Japanese Unexamined Patent Publication No. 2009-168768

In the present invention, in order to expose the opening of the embedded metal embedded in the concrete panel such as the ALC panel to the panel surface, the embedded position of the embedded metal in the surface direction of the panel can be detected without damaging the panel. The purpose is to do.

The present inventors have performed the above-mentioned problem by scanning the embedding position of the embedded metal with a magnetic sensor and contributing to the determination of the embedding position by the circular region specifying process in which the configuration is optimized by an original idea. We came up with the idea that we could solve the problem, and completed the present invention. Specifically, the present invention provides the following.

(1) A method for detecting the position of an embedded metal object embedded in a concrete panel, which is a range near the estimated embedded position of the embedded metal object on the surface of the concrete panel by a magnetic sensor. A scanning step of scanning the above, and a circular region specifying step of specifying a circular region surrounded by a boundary line between a range in which magnetism generated from the embedded metal is detected by the magnetic sensor and a range in which the magnetism is not detected. A method for detecting the position of an embedded metal object, comprising a step of determining an embedded metal object, which determines that the central position of the circular region is the embedded position of the embedded metal object in the plane direction of the concrete panel.

According to the method of detecting the position of the embedded metal in the concrete panel (1), the embedded position of the embedded metal embedded in the concrete panel in the surface direction can be detected without damaging the panel.

(2) In the burial position determination step, the estimated burial depth of the embedded metal calculated from the radius of the circular region is determined to be the buried position of the embedded metal in the depth direction (1). ) Is the method for detecting the position of the embedded hardware.

According to the method for detecting the position of the embedded metal in the concrete panel (2), the embedded position of the embedded metal panel embedded in the concrete panel in the surface direction and the depth direction can be detected without damaging the panel.

(3) The magnetic sensor is composed of a plurality of magnetic sensor elements arranged in series, and in the scanning step, the magnetic sensor is used in a range in the vicinity of the estimated burial position with the arrangement direction of the plurality of magnetic sensor elements. The method for detecting the position of an embedded metal piece according to (1) or (2), which makes a linear motion along orthogonal directions.

According to the method of detecting the position of the embedded hardware in (3), the embedding position is determined by reducing the variation from the ideal value of the position and size of the circular region specified in the circular region specifying process by the minimum scanning work. In the process, the burial position of the embedded metal can be determined more accurately.

(4) Before embedding the embedded metal in the concrete panel, a magnetic generating portion forming step of forming a magnetic generating portion around the opening of the embedded metal is performed, according to (1) to (3). The method for detecting the position of the embedded hardware described in any of the above.

According to the method for detecting the position of the embedded metal, the accuracy of magnetic detection in the scanning process is improved by increasing the strength of the magnetism emitted from the opening of the embedded metal, for example, the embedding depth is above a certain level. Even in the case of the depth of the embedded metal, the position of the opening of the embedded metal can be determined with high accuracy in the embedded position determination step.

(5) The method for detecting the position of embedded metal in a concrete panel according to any one of (1) to (4), wherein the concrete panel is a lightweight cellular concrete panel.

According to the method for detecting the position of the embedded metal in (5), the embedded position of the embedded metal can be determined with high accuracy in a lightweight cellular concrete panel which is a precast type building material and requires frequent drilling work after panel molding. You can judge.

(6) A scanning unit that scans the surface of a concrete panel in which an embedded metal object is embedded by a magnetic sensor composed of a plurality of magnetic sensor elements along a direction orthogonal to the arrangement direction of the plurality of magnetic sensor elements. A circular region specifying portion and a circular region specifying a circular region surrounded by a boundary line between a range in which magnetism generated from the embedded metal is detected by the magnetic sensor element and a range in which the magnetism is not detected. An embedded metal position detecting device including a buried metal position determining unit that determines that the center position is the embedded position of the embedded metal in the plane direction of the concrete panel.

According to the embedded metal position detection device (6), the embedded position in the surface direction of the embedded metal panel embedded in the concrete panel such as the ALC panel can be detected without damaging the panel.

(7) The burial position determination unit determines that the estimated burial depth of the embedded metal calculated from the radius of the circular region is the buried position of the embedded metal in the depth direction (6). Embedded hardware position detector as described in.

According to the embedded metal position detection device of (7), it is possible to detect the buried position in the surface direction and the buried position in the depth direction of the embedded metal panel embedded in the concrete panel without damaging the panel. can.

(8) The embedded hardware position detecting device according to (7), wherein a plurality of the magnetic sensor elements are arranged in a staggered pattern in the magnetic sensor.

According to the embedded metal position detection device (8), a device capable of detecting the embedded metal position with sufficiently high accuracy without damaging the panel is configured by using the minimum required number of magnetic sensor elements. can do.

According to the present invention, in order to expose the opening of the embedded metal embedded in the concrete panel such as the ALC panel to the panel surface, the embedded position of the embedded metal in the surface direction of the panel is damaged. Can be detected without.

It is a flow chart which shows the flow of the process of the embedded metal part position detection method of this invention. It is a schematic diagram provided for the explanation of the embodiment of the scanning process in the method of detecting the position of an embedded metal piece of this invention. It is a drawing which shows schematically. In the scanning step shown in FIG. 2, a schematic used for explaining an embodiment of the circular region specifying step in which the magnetic sensor specifies a circular region surrounded by a boundary line between a range where magnetism is detected and a range where magnetism is not detected. It is a figure. It is a figure which shows the specific example of the specified circular area in the circular area specifying process shown in FIG. It is a drawing which provides the explanation of the method of determining the burial depth in the burial position determination process. It is a drawing which shows typically the structure of the embedded metal part position detection apparatus of this invention, and an example of embodiment thereof. It is a perspective view which shows an example of the embedded metal object embedded in the concrete panel which is the object of carrying out the embedded metal object position detection method of this invention.

Hereinafter, preferred embodiments of the "method for detecting the position of the embedded hardware" and the "device for detecting the position of the embedded hardware" of the present invention will be described. However, the present invention is not limited to the following embodiments.

<Method of detecting the position of embedded hardware>
The "method for detecting the position of the embedded metal" of the present invention is a method capable of detecting the embedded position of the embedded metal embedded inside the concrete panel without damaging the panel. As shown in FIG. 1, this embedded hardware position detection method is a process including a scanning step st1, a circular region specifying step st2, and an embedded position determination step st3.

In the following, in order to facilitate understanding of the overall configuration of the "method for detecting the position of embedded hardware" of the present invention, the details of each process will be described assuming that each process is performed sequentially. , It is not necessarily a process that requires step-by-step processing as a clearly independent process in chronological order. For example, when the scanning step st1 is performed, the circular region specifying step st2 may be executed substantially or apparently at the same time, and the entire process including the burial position determination step st3 is substantially or apparently. Above, they may be executed at the same time.

Further, the "method for detecting the position of the embedded metal" of the present invention can be applied to various steps for detecting the embedded position of the embedded metal in various concrete panels. However, as an example, the embedded hardware 2 as shown in FIG. 8 is widely used as a precast type building material to be carried into a construction site or the like in a state of being buried in advance, and is for detecting the buried position. Also, implementation in lightweight cellular concrete panels, where work involving damage to the panel is not tolerated, can be cited as a particularly preferred embodiment.

In the lightweight cellular concrete panel (ALC panel), which is a preferred object of the "method for detecting the position of embedded metal" of the present invention, the embedded metal 2 is fixed to the reinforcing bar 31 arranged in the panel in the manufacturing process. In this state, the material slurry is injected and foamed and cured to obtain an ALC panel in which the embedded metal 2 is embedded.

Further, as the embedded metal fitting, if the metal fitting is used by exposing the opening (nut portion) to the panel surface in a state of being embedded inside the concrete panel 3, various known embedded metal fittings can be obtained. It can be implemented without restrictions. However, in the "method for detecting the position of the embedded metal" of the present invention, as shown in FIG. 8, the embedded metal 2 in which the magnetic generating portion 22 is formed around the opening of the main body 21 of the embedded metal is used. It is preferable to use it.

As the magnetic material for forming the magnetic generating portion 22 around the opening, a so-called rubber magnet such as an anisotropic rubber magnet composed of a ferrite magnet and a nitrile rubber copolymer may be used. preferable. As an example, the magnetic generating portion 22 can be easily formed by winding a general-purpose tape-shaped rubber magnet around the opening of the main body 21 of the embedded metal.

As the magnetic generator 22 described above, as shown in FIG. 8, a cap-shaped magnet may be used. By manufacturing or acquiring a required amount of such cap-shaped parts for forming the magnetic generating portion 22 in advance, it is possible to attach the embedded metal to the main body 21 as an extremely easy operation. Further, when this is used for a lightweight cellular concrete panel, it can also function as a cap for preventing the inflow of the material slurry attached to the opening in order to prevent the inflow of the material slurry in the panel manufacturing process. ..

[Scanning process]
The scanning step st1 is a step of scanning the area near the estimated embedding position of the embedded metal fitting 2 on the surface of the concrete panel 3 by the magnetic sensor 11.

In this scanning step st1, first, as shown in FIG. 2, the embedded hardware position search device 1 is moved in the direction of the arrow S to estimate the embedded hardware 2 inferred from a given design value. Move to the vicinity of the burial position. Then, the range around the estimated burial position (“range near the estimated burial position”) is scanned by the magnetic sensor 11.

Further, in the "method for detecting the position of the embedded metal fitting" of the present invention, as shown in FIG. The "magnetic generator forming step" for forming the above can also be a process performed prior to the scanning step st1. In this case, the magnetic generator 22 can be made of various known magnetic materials that generate magnetism, such as a rubber magnet.

In the present specification, the "magnetism generated from the embedded metal fitting" is derived from, for example, a magnetic field line directly generated from the magnetic generating portion 22 or the like formed on the embedded metal fitting 2. Not limited to this, it includes all magnetism generated by a change in the magnetic field due to the presence of the embedded metal that is a conductor. That is, "magnetism generated from the embedded metal" means that when a conventionally known metal detector that promotes a change in the magnetic field by using electromagnetic induction and detects the change in the magnetic field is used as the magnetic sensor 11. It is a concept that includes changes in the magnetic field detected as magnetism, which indicates the existence of metal.

Further, in the scanning step st1, it is possible to preferably use a magnetic sensor having a plurality of magnetic sensor elements 111, which are arranged in series or in a staggered manner in a plurality of rows. For example, as shown in FIG. 3, the magnetic sensor 11 in which the magnetic sensor elements 111 are arranged in a staggered manner is described above in a range near the estimated burial position estimated based on the design burial position of the embedded hardware 2. It is preferable to perform scanning in a manner of linearly moving along a direction orthogonal to the arrangement direction of the plurality of magnetic sensor elements 111. As a result, it is possible to improve the accuracy of the buried position detection of the embedded metal by reducing the variation from the ideal value of the position and size of the circular region specified in the circular region specifying step st2 by the minimum scanning work. can. When there is only one magnetic sensor element 111, the same effect as described above can be enjoyed by reciprocating the magnetic sensor element 111 a plurality of times in the range near the estimated burial position in the scanning step st1. ..

[Circular area identification process]
As shown in FIG. 3, for example, the circular region specifying step st2 is performed inside the concrete panel 3 from the distribution of the range in which the “magnetism generated from the embedded hardware” obtained by the scanning step st1 is detected. This is a step of specifying a circular region 100, which is a region surrounded by a boundary line between a range in which magnetism generated from the embedded metal fitting 2 is detected and a range in which the magnetism is not detected. In the circular region specifying step st2, arithmetic processing for specifying the circular region 100 is performed from the distribution of the range in which the "magnetism generated from the embedded hardware" obtained in the scanning step st1 is detected and the range in which the "magnetism is not detected" is detected. It can be performed by various possible information processing devices, programs, and the like.

Regarding the circular region specifying step st2, for example, in the case of FIG. 3 showing an example of the embodiment, among the plurality of magnetic sensor elements 111 included in the magnetic sensor 11, the magnetic sensor element 111A detects magnetism in the scanning step st1. However, the magnetic sensor element 111B starts to detect magnetism at "position ON" in the figure, and discontinues magnetism detection at "position OFF". That is, the above-mentioned "position ON" and "position OFF" in the scanning path of the magnetic sensor element 111B are boundary points, and the range between them is the "range in which magnetism generated from the embedded metal 2 is detected". Then, based on the same scanning results from all the magnetic sensor elements 111, it is surrounded by the boundary line between the "range in which the magnetism generated from the embedded metal 2 is detected" and the "range in which the magnetism is not detected". The circular region 100 is specified.

More specifically, the designation of the circular region 100 can be obtained by the least squares method from the plurality of boundary points specified by the above-mentioned "position ON" and "position OFF" obtained in the scanning step st1. Table 1 below shows the results of a test to confirm the specific accuracy when a circular region is specified using the method of least squares according to the method of the present invention, and shows the number of boundary points and the specification of the circular region. Correlation of result variability is shown. Also, FIG. 4 is an example of the individual circular regions identified by the test.

In the above test, the magnetic sensor element 111 is changed in the range of 2 to 5, that is, the number of boundary points is changed to 4, 6, 8, and 10, in each embodiment. , The circle area is specified 5 times each, and the accuracy of the circle area specification (“circle fitting”) is compared. It was confirmed that the accuracy can be sufficiently sufficient for practical use by using two magnetic sensor elements 111 and securing about four boundary points, but in order to further improve the accuracy, the number of magnetic sensor elements 111 is three. The above is preferable. In Table 1, (a and b) indicate the center coordinates of the specified circular region, r indicates the radius of the same circular region, and σ indicates the variance (standard deviation) of the test results of five times. In reality, the moving path (scanning line) of the magnetic sensor may be in contact with one point in the circular region. In that case, the number of boundary points is not necessarily the magnetic sensor element as described above. It may not be twice the number of 111.

[Buried position determination process]
The buried position determination step st3 is a step of determining that the center position of the circular region 100 specified in the circular region specifying step st2 is the buried position of the embedded metal fitting 2 in the surface direction of the concrete panel 3. The buried position determination step st3 can be performed by various information processing devices, programs, or the like capable of arithmetic processing related to the coordinate information of the circular region 100 specified in the circular region specifying step st2.

Further, in the method for detecting the position of the embedded hardware of the present invention, in addition to the determination of the buried position in the plane direction described above, the buried position determination step st3 is further combined with the buried position in the depth direction of the embedded metal 2. It can also be a process of making a judgment. In this case, the determination of the "radius of the circular region 100" in the depth direction of the embedded metal fitting 2 is based on the estimated embedding depth of the embedded metal fitting 2 from the radius of the circular region 100 specified in the circular region specifying step st2. It is done by calculating.

The "radius of the circular region 100" specified in the circular region specifying step ST2 and the "distance between the magnetic sensor element 111 and the magnetic generating portion (magnet tape) of the embedded hardware (hereinafter," estimated distance between sensor hardware "). In FIG. 5, "Z distance") "has a certain correlation. Therefore, the "distance between the sensor hardware" can be calculated from the "radius of the circular region 100", and the estimated embedding depth of the embedded hardware 2 can be calculated from this value.

Regarding the calculation of the "estimated distance between sensor hardware" of the above-mentioned embedded hardware 2, specifically, a calibration curve is created based on the measured value of the buried hardware whose burial depth is specified in advance. By extrapolating the value of the "radius of the circular region 100" specified in the circular region specifying step ST2 to this calibration curve, the "estimated distance between the sensor hardware" is calculated from the "radius of the circular region 100". (See Fig. 6).

However, in the case of the above conversion method, there may be two solutions depending on the embedding depth of the embedded hardware 2 in the concrete panel 3. For example, FIG. 6 shows a case where the opening diameter of the embedded metal is 18 mm, the opening is covered, and the magnetic generating portion 22 is formed in the state shown in FIG. 8 by a rubber magnet having a thickness of 1.5 mm. The calibration curve in. In this case, the solution of the "estimated distance between the sensor hardware (Z distance)" corresponding to the case where the "radius of the circular region" is 31 mm is "10 mm" and "25 mm".

Therefore, in the implementation of the present invention, the range of use of the calibration curve is defined so that the solution of the above-mentioned "estimated distance between sensor hardware (Z distance)" becomes one according to the detection target. Specifically, if the detection target is an embedded metal object buried in lightweight cellular concrete, the range of use of the calibration curve in FIG. 6 is set in consideration of the fact that the actual burial depth is around 30 mm. , The Z distance may be in the range of 18 mm to 42 mm. Thereby, in the burial position determination step st3, one correct solution can be estimated for the estimated burial depth of the embedded metal fitting 2 from the radius of the circular region 100.

(Punching process)
In the implementation of the "method for detecting the position of the embedded hardware" of the present invention, the surface of the concrete panel 3 is formed by performing the "drilling step" of drilling the embedded metal 2 at the buried position determined in the buried position determination step st3. The opening of the embedded hardware 2 can be appropriately exposed. Further, at this time, the position of the embedded metal fitting 2 in the depth direction can be drilled to an appropriate depth without excess or deficiency according to the depth determined based on the above conversion method.

<Embedded hardware position detector>
The "method for detecting the position of an embedded metal object" including each of the above steps can be performed, for example, by using an embedded metal object position detecting device 1 provided with a magnetic sensor 11 as shown in FIG. 7.

The embedded hardware position detection device 1 of the present invention is embedded with a scanning unit composed of a magnetic sensor 11 for performing the above-mentioned scanning step st1, a circular region specifying portion (not shown) for performing the circular region specifying step st2, and a circular region specifying portion (not shown). It is a device including a buried position determination unit (not shown) for performing a position determination step st3. Further, as shown in FIG. 7, it is preferable that the embedded hardware position detecting device 1 is integrated with the drilling tool 12 that performs the drilling step.

As the magnetic sensor constituting the scanning unit, various conventionally known devices can be appropriately used. However, it is preferable that the magnetic sensor elements have a plurality of magnetic sensor elements and are arranged in series, and as shown in FIGS. 2 and 3, the magnetic sensor elements 111 are staggered in a plurality of rows. The magnetic sensor 11 arranged in the above can be particularly preferably used.

As described above, the circular area specifying unit and the buried position determination unit may configure each process of the circular area specifying step st2 and the buried position determination step st3 by an information processing device, a program, or the like that can be executed. can. It is preferable that the burial position determination unit determines that the estimated burial depth of the embedded metal calculated from the radius of the circular region is the buried position of the embedded metal in the depth direction.

1 Embedded hardware position detector 11 Magnetic sensor 111 Magnetic sensor element 12 Drilling tool 2 Embedded hardware 21 Embedded hardware body 22 Magnetic generator 3 Concrete panel (lightweight cellular concrete panel)
31 Reinforcing bar st1 Scanning process st2 Circular area identification process st3 Buried position determination process

Further, the "method for detecting the position of the embedded metal" of the present invention can be applied to various steps for detecting the embedded position of the embedded metal in various concrete panels. However, as an example, the embedded hardware 2 as shown in FIG. 7 is widely used as a precast type building material to be carried into a construction site or the like in a state of being buried in advance, and is for detecting the buried position. Also, implementation in lightweight cellular concrete panels, where work involving damage to the panel is not tolerated, can be cited as a particularly preferred embodiment.

Further, as the embedded metal fitting, if the metal fitting is used by exposing the opening (nut portion) to the panel surface in a state of being embedded inside the concrete panel 3, various known embedded metal fittings can be obtained. It can be implemented without restrictions. However, in the "method for detecting the position of the embedded metal" of the present invention, it is preferable to use the embedded metal 2 in which the magnetic generating portion 22 is formed around the opening of the main body 21 of the embedded metal.

As the magnetic generator 22 described above, as shown in FIG. 7 , a cap-shaped magnet may be used. By manufacturing or acquiring a required amount of such cap-shaped parts for forming the magnetic generating portion 22 in advance, it is possible to attach the embedded metal to the main body 21 as an extremely easy operation. Further, when this is used for a lightweight cellular concrete panel, it can also function as a cap for preventing the inflow of the material slurry attached to the opening in order to prevent the inflow of the material slurry in the panel manufacturing process. ..

Further, in the "method for detecting the position of the embedded metal fitting" of the present invention, as shown in FIG. 7 , in advance, as shown in FIG. The "magnetic generator forming step" for forming the above can also be a process performed prior to the scanning step st1. In this case, the magnetic generator 22 can be made of various known magnetic materials that generate magnetism, such as a rubber magnet.

Regarding the calculation of the "estimated distance between sensor hardware" of the above-mentioned embedded hardware 2, specifically, a calibration curve is created based on the measured value of the buried hardware whose burial depth is specified in advance. By extrapolating the value of the "radius of the circular region 100" specified in the circular region specifying step ST2 to this calibration curve, the "estimated distance between the sensor hardware" is calculated from the "radius of the circular region 100". (See Fig. 5 ).

However, in the case of the above conversion method, there may be two solutions depending on the embedding depth of the embedded hardware 2 in the concrete panel 3. For example, FIG. 5 shows a case where the opening diameter of the embedded metal is 18 mm, the opening is covered, and the magnetic generating portion 22 is formed in the state shown in FIG. 7 by a rubber magnet having a thickness of 1.5 mm. The calibration curve in. In this case, the solution of the "estimated distance between the sensor hardware (Z distance)" corresponding to the case where the "radius of the circular region" is 31 mm is "10 mm" and "25 mm".

Therefore, in the implementation of the present invention, the range of use of the calibration curve is defined so that the solution of the above-mentioned "estimated distance between sensor hardware (Z distance)" becomes one according to the detection target. Specifically, if the detection target is an embedded metal object buried in lightweight cellular concrete, the range of use of the calibration curve in FIG. 5 is set in consideration of the fact that the actual burial depth is around 30 mm. , The Z distance may be in the range of 18 mm to 42 mm. Thereby, in the burial position determination step st3, one correct solution can be estimated for the estimated burial depth of the embedded metal fitting 2 from the radius of the circular region 100.

<Embedded hardware position detector>
As an example, the "method for detecting the position of an embedded hardware" including each of the above steps can be performed by using the embedded hardware position detecting device 1 provided with the magnetic sensor 11 as shown in FIG.

The embedded hardware position detection device 1 of the present invention is embedded with a scanning unit composed of a magnetic sensor 11 for performing the above-mentioned scanning step st1, a circular region specifying portion (not shown) for performing the circular region specifying step st2, and a circular region specifying portion (not shown). It is a device including a buried position determination unit (not shown) for performing a position determination step st3. Further, as shown in FIG. 6 , it is preferable that the embedded hardware position detecting device 1 is integrated with the drilling tool 12 that performs the drilling step.

Claims (8)

It is an embedded hardware position detection method that detects the position of the embedded hardware embedded in the concrete panel.
A scanning step of scanning the area near the estimated embedding position of the embedded metal on the surface of the concrete panel by a magnetic sensor.
A circular region specifying step of specifying a circular region surrounded by a boundary line between a range in which magnetism generated from the embedded metal is detected by the magnetic sensor and a range in which the magnetism is not detected.
A step of determining the burial position, which determines that the center position of the circular region is the burial position of the embedded metal in the plane direction of the concrete panel.
Containing,
How to detect the position of embedded hardware. In the embedding position determination step, it is determined that the estimated embedding depth of the embedded metal object calculated from the radius of the circular region is the embedding position of the embedded metal object in the depth direction.
The method for detecting the position of an embedded hardware according to claim 1. The magnetic sensor comprises a plurality of magnetic sensor elements arranged in series.
In the scanning step, the magnetic sensor is linearly moved along a direction orthogonal to the arrangement direction of the plurality of magnetic sensor elements in a range near the estimated burial position.
The method for detecting the position of an embedded hardware according to claim 1 or 2. Before embedding the embedded metal in the concrete panel, a magnetic generating portion forming step of forming a magnetic generating portion around the opening of the embedded metal is performed.
The method for detecting the position of an embedded hardware according to any one of claims 1 to 3. The concrete panel is a lightweight cellular concrete panel.
The method for detecting the position of an embedded hardware according to any one of claims 1 to 4. A scanning unit that scans the surface of a concrete panel in which an embedded metal object is embedded by a magnetic sensor composed of a plurality of magnetic sensor elements along a direction orthogonal to the arrangement direction of the plurality of magnetic sensor elements.
A circular region specifying portion that specifies a circular region surrounded by a boundary line between a range in which magnetism generated from the embedded metal is detected by the magnetic sensor element and a range in which the magnetism is not detected, and a circular region specifying portion.
It is provided with an embedding position determining unit that determines that the center position of the circular region is the embedding position of the embedded metal piece in the surface direction of the concrete panel.
Embedded hardware position detector. The burial position determination unit determines that the estimated burial depth of the embedded metal calculated from the radius of the circular region is the buried position of the embedded metal in the depth direction.
The embedded hardware position detection device according to claim 6. The embedded hardware position detecting device according to claim 7, wherein a plurality of the magnetic sensor elements are arranged in a staggered manner in the magnetic sensor.

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