Concrete wall surface reinforcement state survey device

Abstract

To provide a concrete wall surface reinforcement state survey device that can safely survey the position and condition of a reinforcing-bar embedded in concrete at a high place such as the upper part of a wall surface of a reinforced concrete structure without requiring time and effort, and can perform survey and measurement even in a narrow place such as an internal corner part of the reinforced concrete structure.SOLUTION: A concrete wall surface reinforcement state survey device includes: a wall surface or the like suction unit 0120 that utilizes negative pressure to perform adsorption with respect to a concrete wall surface or the like; and an electromagnetic wave radar 0130 for surveying an internal metal structure of the concrete wall surface or the like.SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] This application forms the basis of a domestic priority application to be filed at a later date. The present invention relates to a concrete wall reinforcing bar condition detection device that detects the reinforcing bar condition, such as the depth and arrangement of reinforcing bars buried inside the wall surface of a reinforced concrete structure, and the presence or absence of reinforcing bar corrosion. Note that the reinforcing bars in this invention include both reinforcing bars called round steel bars with a circular cross section and reinforcing bars called deformed steel bars with an uneven surface, but for convenience in this specification they will be referred to as round steel bars with a circular cross section. [Background technology]

[0002] In recent years, reinforced concrete structures such as buildings and bridges built during Japan's period of rapid economic growth from around 1955 to around 1973, known as the "high growth period," have been aging, and some of these aging reinforced concrete structures lack the seismic resistance to withstand major earthquakes that are expected to occur in the near future. In order to ensure that reinforced concrete structures have sufficient seismic resistance to withstand earthquake damage, it is first necessary to understand the depth and arrangement of the buried rebars, which are necessary for drilling holes and other work in reinforcement work, as well as the condition of the rebars themselves, such as whether or not they are corroded (the condition of the concrete wall reinforcement), before carrying out reinforcement work.

[0003] Conventionally, the depth, arrangement, and other positions of rebars are determined by scanning the wall of a reinforced concrete structure, such as a building, in which the rebars are buried, with an electromagnetic radar and acquiring hyperbola waveforms, which are information on the waves reflected by the rebars and returning during the radar scan.On the other hand, the presence or absence of corrosion in the rebars themselves is assessed by placing the electrodes of a rebar corrosion detector on the wall directly above the rebars identified by the electromagnetic radar scan, supplying an electric current, and measuring the increase in electrical resistance and changes in potential as parameters to evaluate the degree of corrosion.

[0004] However, since the above-mentioned work of determining the position of the reinforcing bars, such as their depth and arrangement, and the work of measuring the presence or absence of corrosion of the reinforcing bars themselves are both performed by the measurer holding a sensor such as an electromagnetic wave radar or a reinforcing bar corrosion detector in his / her hand, when searching for the position of reinforcing bars or measuring their condition at high altitudes such as the top of a wall, it is necessary to use scaffolding or aerial work vehicles. In other words, it takes time and effort to set up scaffolding or arrange aerial work vehicles, makes emergency response difficult in the event of a disaster, and above all, there is the drawback that the work of searching for the position of reinforcing bars or measuring their condition while holding a sensor in his / her hand at high altitudes is dangerous.

[0005] One example of a device that can overcome these conventional drawbacks is the wall surface inspection device described in Patent Document 1. This wall surface inspection device includes a drone and rolling wheels rotatably supported at both ends of a rolling shaft that runs along the left-right direction of the drone's body. The rolling wheels abut against the surface to be inspected, which is, for example, the wall surface of a reinforced concrete structure, before the drone does so, preventing the drone's multiple rotors from contacting the surface. The drone's ascending and descending movements allow the rolling wheels to roll up and down along the surface to be inspected together with the drone's body. In this wall surface inspection device, the drone is controlled to fly along the surface of the concrete structure to be inspected by the left and right rolling wheels. The surface to be inspected is struck by a striking mechanism mounted on the drone, and the striking sound is analyzed to determine whether the area is sound or unsound.

[0006] Recently, attempts have been made to equip such wall inspection devices with sensors such as electromagnetic radar and rebar corrosion detectors, eliminating the need to manually locate the depth and arrangement of rebars or measure whether or not the rebars themselves are corroded. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent Publication No. 2020-118622 Summary of the Invention [Problem to be solved by the invention]

[0008] However, when sensors such as an electromagnetic wave radar or a rebar corrosion detector are installed in the wall surface inspection device described in Patent Document 1, the sensor needs to be pressed against the surface to be inspected in order to improve the detection accuracy and measurement accuracy. Therefore, a pressing means for this pressing must be installed, and the number of rotors or the rotor diameter must be increased by the amount of the weight of the pressing means, resulting in the problem of the device becoming larger. Furthermore, by moving the sensor up and down along the surface to be inspected along with the drone's body as it ascends and descends, the depth and arrangement of the rebars can be located, and the rebars themselves can be measured for corrosion. However, this, combined with the increased size of the device, means that it is not possible to search or measure narrow areas such as corners, let alone the ceiling surfaces of reinforced concrete structures. In other words, there is the problem that the range of search and measurement is limited.

[0009] The present invention has been made to solve the above-mentioned conventional problems, and aims to provide a concrete wall reinforcement condition detection device that can safely detect the position and condition of reinforcing bars buried inside concrete at high altitudes, such as the top of the wall of a reinforced concrete structure, without the need for scaffolding or arranging for an aerial work vehicle, and that can also perform detection and measurement in narrow places such as the inside corners of a reinforced concrete structure. [Means for solving the problem]

[0010] In order to solve the above problems, the present invention provides the following concrete wall reinforcement condition detection device. That is, the first aspect of the present invention is configured to have a wall surface etc. adsorption section for adsorbing to a concrete wall surface etc. (sometimes also referred to as a ceiling surface; the same applies below) by utilizing negative pressure, and an exploration section for exploring metal structures inside the concrete wall surface etc.

[0011] In a second aspect of the present invention, the exploration unit includes radar exploration means and / or electrical resistance exploration means.

[0012] Furthermore, a third aspect of the present invention is configured to further include a flying section for flying.

[0013] Furthermore, in a fourth aspect of the present invention, the flying unit is configured to have a drone function.

[0014] Furthermore, in a fifth aspect of the present invention, there are a plurality of wall surface adsorption portions, and the configuration further includes a wall surface adsorption moving portion that allows one wall surface adsorption portion to move from the wall surface position where it is being adsorbed to another wall surface position while the other wall surface adsorption portion is adsorbed to one wall surface. [Effects of the Invention]

[0015] According to the present invention, for example, it is possible to inspect the condition of reinforcing bars at high places, such as the upper part of the wall of a reinforced concrete structure, safely and without the need for scaffolding or aerial work vehicles, and in addition, it is possible to obtain the extremely excellent effect of being able to inspect and measure even in narrow places such as the corners of a reinforced concrete structure. [Brief explanation of the drawings]

[0016] [Figure 1A] 1 is a perspective view showing a concrete wall surface reinforcement condition inspection device according to a first embodiment. FIG. [Figure 1B] 1B is a perspective view of the concrete wall reinforcement condition detection device of FIG. 1A from the bottom side. FIG. [Figure 1C] 1B is an explanatory diagram showing the operation of the concrete wall reinforcement condition detecting device of FIG. 1A ascending up the wall surface. FIG. [Figure 2A] FIG. 10 is a perspective view showing a concrete wall reinforcement condition inspection device according to a second embodiment. [Figure 2B] 2B is a perspective view of the concrete wall reinforcement condition detection device of FIG. 2A from the bottom side. FIG. [Figure 2C]2B is an explanatory diagram showing the operation of the two main units of the concrete wall reinforcement condition detection device of FIG. 2A ascending side by side on the wall surface. FIG. [Figure 2D] 10 is an explanatory diagram showing the operation of the concrete wall reinforcement condition detecting device according to the second embodiment, showing a situation in which one of the two device bodies moves upward before the other. FIG. [Figure 2E] 2E is an explanatory diagram showing the state in which the two device main bodies shown in FIG. 2D change course in the same direction. FIG. [Figure 3] 10 is a side view illustrating a state in which the concrete wall reinforcement condition detecting device according to the third embodiment has reached the wall surface. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0017] The following describes embodiments of a concrete wall reinforcement condition detection device according to the present invention. The relationships between the embodiments and the claims are as follows: Embodiment 1 mainly relates to claim 1, Embodiment 2 mainly relates to claims 2 and 5, and Embodiment 3 mainly relates to claims 3 and 4. It should be noted that the present invention is not limited to these embodiments, and can be embodied in various forms without departing from the spirit of the present invention. <Embodiment 1 corresponds mainly to claim 1>

[0018] This embodiment mainly relates to claim 1. <Embodiment 1: Overview of a concrete wall reinforcement condition detection device (mainly corresponds to claim 1)>

[0019] The concrete wall reinforcement condition detection device according to this embodiment is capable of detecting metal structures inside a concrete wall surface or the like while adsorbing to the concrete wall surface or the like of a reinforced concrete structure.

[0020] Therefore, with the concrete wall reinforcement condition detection device of this embodiment, there is no need to carry out the detection work of reinforcing bars, which are metal structures, by hand-holding sensors such as electromagnetic wave radar or reinforcing bar corrosion detectors, so even when detecting at high altitudes such as the top of a wall in a reinforced concrete structure, it is possible to perform the detection safely and without hassle, without setting up scaffolding or arranging for a high-altitude work vehicle. In addition, since the device detects metal structures inside the concrete wall surface while adsorbing to the concrete wall surface of a reinforced concrete structure, it can perform searches and measurements even in narrow places such as the corners of the reinforced concrete structure. The reinforced concrete structures to be inspected by the concrete wall reinforcement condition inspection device according to the present invention include walls, columns, beams, floors, foundations, etc. of buildings, as well as bridges and tunnels. <Embodiment 1: Concrete wall surface reinforcement condition detection device Configuration mainly corresponds to claim 1>

[0021] As shown in FIG. 1A, a concrete wall surface reinforcement condition inspection device 0100 according to this embodiment includes a device main body 0110, a wall surface adhesion unit 0120, and an electromagnetic wave radar 0130 as an inspection unit. <Embodiment 1: Device main body configuration mainly corresponds to claim 1>

[0022] The device main body 0110 is in the form of a vehicle with crawlers (endless tracks) 0111 arranged on the left and right sides, and inside this device main body 0110 are mounted a drive motor for driving the left and right crawlers 0111, 0111 to move the device main body 0110, a power supply unit for supplying power to this drive motor, and a control unit. When an external power source is used, the power supply unit supplies external power to the drive motor via a cable, and when a battery installed in the device main body 0110 is used, the power supply unit supplies power directly from the battery to the drive motor. The control unit is provided to control the operation of the device main body 0110, and transmits commands from an operating unit such as an external PC or mobile terminal via a cable or wirelessly to the drive motor. <Embodiment 1: Wall surface adsorption unit configuration (mainly corresponds to claim 1)>

[0023] The wall surface etc. adsorption unit 0120 is composed of a blower 0121 built into the device main body 0110, an air intake port 0122 arranged on the bottom surface of the device main body 0110 as shown in Fig. 1B, and an adsorption surface 0123 which is the bottom surface of the device main body 0110. The blower 0121 of the wall surface etc. adsorption unit 0120 is supplied with power from a power supply unit mounted on the device main body 0110, and when operating, it draws in air from the air intake port 0122. The wall surface etc. adsorption unit 0120 operates the blower 0121 to create a negative pressure space in the space between the adsorption surface 0123, which is the bottom surface of the device main body 0110, and the concrete wall surface etc., so that the device main body 0110 can be adsorbed to the concrete wall surface W as shown in FIG. 1C. In this adsorption state, the device main body 0110 can ascend and descend on the concrete wall surface W or move along the ceiling surface by operating the left and right crawlers 0111, 0111. <Embodiment 1: Configuration of the Searching Unit, Mainly Corresponding to Claim 1>

[0024] In this embodiment, the electromagnetic wave radar 0130 serving as the detection unit is of a type that is towed by the device main body 0110. This electromagnetic wave radar 0130 is detachably connected to the device main body 0110 via a connecting part 0113, and the connecting part 0113 is configured so that, when the device main body 0110 is attached to a concrete wall surface or the like by the wall surface attachment part 0120, the electromagnetic wave radar 0130 can also be attached to a concrete wall surface or the like together with the device main body 0110. <Embodiment 1: Concrete wall surface reinforcement condition detection device Action: Mainly corresponds to claim 1>

[0025] When such a concrete wall surface reinforcement condition detection device 0100 is used to detect the position of rebar in a reinforced concrete structure, for example, a wall surface, the blower 0121 of the wall surface etc. adsorption unit 0120 is operated on the concrete wall surface W as shown in FIG. 1C , and air is sucked in from the air intake port 0122 of the device main body 0110, thereby utilizing the negative pressure generated between the adsorption surface 0123, which is the bottom surface of the device main body 0110, and the concrete wall surface W, the device main body 0110 is adsorbed to the concrete wall surface W. Then, in this suction state, the left and right crawlers 0111, 0111 of the device main body 0110 are operated to raise the device main body 0110 along the concrete wall surface W, and the electromagnetic wave radar 0130 serving as the detection unit performs scanning while rising together with the device main body 0110 in the direction of the arrow in Figure 1C, and by acquiring hyperbola waveforms, which are information on reflected waves that are reflected by the reinforcing bars and return, during this radar scanning, positional data of multiple reinforcing bars that are buried inside the concrete wall surface W is collected.

[0026] In this embodiment, the electromagnetic wave radar 0130 as the detection unit is configured to communicate data with a data analysis device (not shown) via a wireless LAN. Note that this data communication may be configured to be performed via a cable or via a memory such as a USB. <Embodiment 1: Concrete wall reinforcement condition detection device Effect: Mainly corresponds to claim 1>

[0027] The concrete wall reinforcement condition detection device of this embodiment does not require the electromagnetic wave radar to be held by hand to detect the position of reinforcing bars, so even when detecting the position of reinforcing bars at a high altitude, such as the top of a wall in a reinforced concrete structure, the detection can be carried out safely and without the need for scaffolding or an aerial work vehicle, and in addition, since the device detects the position of reinforcing bars inside a concrete wall while adhering to the concrete wall of a reinforced concrete structure, it is possible to avoid the detection device becoming larger than in conventional cases where a sensor such as an electromagnetic wave radar is moved up and down along the concrete wall by the ascending and descending motion of the drone itself, and as a result, it is possible to detect not only the ceiling surface of a reinforced concrete structure, but also narrow areas such as inside corners. <Embodiment 2 corresponds mainly to claims 2 and 5>

[0028] This embodiment mainly relates to claims 2 and 5. <Embodiment 2: Overview of a concrete wall reinforcement condition detection device (mainly corresponds to claims 2 and 5)>

[0029] This embodiment is based on embodiment 1, and in the concrete wall surface reinforcement condition detection device of this embodiment, the detection unit is configured to have an electromagnetic wave radar as a radar detection means and a rebar corrosion detector as an electrical resistance detection means. In addition, since the inspection unit has an electromagnetic wave radar and a rebar corrosion detector, it has two wall surface suction units, and further has a wall surface suction movement unit that allows one wall surface suction unit to be attached to one wall surface position while the other wall surface suction unit is attached to another wall surface position.

[0030] The concrete wall reinforcement condition detection device according to this embodiment can determine the position of buried rebars, such as their depth, in a reinforced concrete structure, for example, in a wall, and can also determine the condition of the rebars themselves, such as whether corrosion has occurred (concrete wall reinforcement condition), thereby improving work efficiency and correspondingly shortening construction time and reducing costs. In addition, the electromagnetic wave radar and rebar corrosion detector, which are the detection units, can be operated as a set inside the wall without human assistance, which further improves work efficiency. <Embodiment 2: Concrete wall surface reinforcement condition detection device Configuration mainly corresponds to claims 2 and 5>

[0031] As shown in FIGS. 2A and 2B, the concrete wall reinforcement condition detecting device 0200 of this embodiment has two distinctive features compared to the previous embodiment, and the other configurations are the same as those of the previous embodiment. One of the two features of this embodiment is that it is provided with two device main bodies 0210 each having the form of a vehicle and each having a wall surface adsorption portion 0220, and an electromagnetic wave radar 0230 serving as a radar detection means of the detection portion is detachably connected to one of the device main bodies 0210 via a connecting portion 0213, and a rebar corrosion detector 0231 serving as an electrical resistance detection means is detachably connected to the other device main body 0210 via the connecting portion 0213. The other of the two features of this embodiment is that it further has a wall surface adsorption moving part 0240 for connecting the wall surface adsorption parts 0220 of the device main bodies 0210, 0210 while allowing them to move relative to each other. <Embodiment 2: Wall surface adsorption / movement unit configuration corresponds mainly to claims 2 and 5>

[0032] The wall surface adsorption moving part 0240 functions to connect the wall surface adsorption part 0220 while allowing the wall surface adsorption part 0220 to move relatively, that is, the device main body 0210 to move relatively, and is arranged across the two device main bodies 0210, 0210.

[0033] In this case, the wall surface suction-moving part 0240 has a configuration in which both ends 0241a, 0241a of a curved rod 0241 are connected to the upper surfaces of the two device bodies 0210, 0210 via universal joints 0242. In other words, the end 0241a of the rod 0241 is connected to the upper surface of the device body 0210 so as to be rotatable about a vertical axis L1 and a horizontal axis L2 (the vertical axis L1 and the horizontal axis L2 are only shown in FIG. 2A). <Embodiment 2: Concrete wall surface reinforcement condition detection device Operation mainly corresponds to claims 2 and 5>

[0034] When searching the upper region of a concrete wall surface W, for example, using the concrete wall surface reinforcement condition detection device 0200 of this embodiment, as shown in FIG. 2C , two device bodies 0210, 0210 connected by a wall surface adsorption / movement unit 0240 are adsorbed to the lower region of the concrete wall surface W by operating each wall surface adsorption unit 0220, and then translated upward by operating each crawler 0211 to move to the upper region of the concrete wall surface W, which is the surface to be searched.

[0035] When the two device bodies 0210, 0210 connected by the wall suction-moving part 0240 approach the upper region of the concrete wall W, as shown simply in Fig. 2D, the radar-equipped device body 0210R (the device body 0210 towing the electromagnetic wave radar 0230) located on the right side of the figure is moved at a faster speed than the corrosion detector-equipped device body 0210L (the device body 0210 towing the rebar corrosion detector 0231) located on the left side of the figure. At this time, the end 0241a of the rod 0241 in the wall suction-moving part 0240 between the radar-equipped device body 0210R and the corrosion detector-equipped device body 0210L is connected to the top surface of the device body 0210 via a universal joint 0242, so that it does not interfere with the above series of operations.

[0036] Next, by making a difference in the rotational speed of the left and right crawlers 0211, 0211 of the leading radar-equipped device main body 0210R, and by making a difference in the rotational speed of the left and right crawlers 0211, 0211 of the trailing corrosion detector-equipped device main body 0210L, the radar-equipped device main body 0210R and the corrosion detector-equipped device main body 0210L are moved in the same direction (for example, toward the upper right in the figure), as shown simply in Figure 2E. In this way, by moving the radar-equipped device main body 0210R and the corrosion detector-equipped device main body 0210L in the upper area of ​​the concrete wall surface W while changing and maintaining their direction, it is possible to continuously search for reinforcing bars in the upper area of ​​the concrete wall surface W and measure the condition of the reinforcing bars. On the other hand, after the search and measurement are completed, the radar-equipped device main body 0210R and the corrosion detector-equipped device main body 0210L are each oriented downward and directed toward the lower side of the concrete wall surface W. In other words, the concrete wall surface reinforcement condition detection device 0200 can be easily retrieved. <Embodiment 2: Concrete wall surface reinforcement condition detection device Effect mainly corresponds to claims 2 and 5>

[0037] The concrete wall reinforcement condition detection device of this embodiment can perform both the determination of the position, such as the depth, of buried rebars in a reinforced concrete structure, for example, a wall, and the determination of the condition (concrete wall reinforcement condition), such as whether or not corrosion has occurred in the rebar itself, as a set. This improves work efficiency, thereby shortening construction time and reducing costs. In addition, the detection unit, which consists of an electromagnetic wave radar and a rebar corrosion detector, can be moved from the bottom of the wall to the top of the wall, or from the top of the wall to the bottom of the wall, without human assistance, which has the effect of further improving work efficiency. <Embodiment 3 corresponds mainly to claims 3 and 4>

[0038] This embodiment mainly relates to claims 3 and 4. <Embodiment 3: Overview of a concrete wall reinforcement condition detection device (mainly corresponds to claims 3 and 4)>

[0039] This embodiment is based on embodiment 2, and the concrete wall surface reinforcement condition inspection device of this embodiment is further configured to have a flying unit equipped with a drone function for flying.

[0040] The concrete wall reinforcement condition detection device of this embodiment has the advantage of being able to measure both the position of the buried rebars, such as their depth and arrangement, and the condition of the rebars themselves, such as whether or not they are corroded (concrete wall reinforcement condition), even if the location where buried rebars are to be detected in a reinforced concrete structure is far away or if there are insurmountable obstacles on the way to the detection location. <Embodiment 3: Concrete wall surface reinforcement condition detection device Configuration mainly corresponds to claims 3 and 4>

[0041] As shown in Figure 3, the concrete wall surface reinforcement condition detection device 0300 of this embodiment is characterized in that it further has a flying unit 0350 for flying, and this flying unit has a drone function, but the other configurations are the same as those of the previous embodiment. <Embodiment 3: Flying section configuration mainly corresponds to claims 3 and 4>

[0042] The flight unit 0350 equipped with a drone function includes a flight unit body 0351, a plurality of rotors 0352 supported by the flight unit body 0351, and a connecting rod 0353 extending downward from the center of the flight unit body 0351. At this time, a clamp 0354 capable of gripping and releasing the curved rod 0341 of the wall surface suction-adhering and moving unit 0340 is provided at the tip of the connecting rod 0353, and by gripping the curved rod 0341 of the wall surface suction-adhering and moving unit 0340 with the clamp 0354, the flight unit 0350 can transport the two device main bodies 0310 connected by the wall surface suction-adhering and moving unit 0340, that is, the electromagnetic wave radar 0330 and the rebar corrosion detector (not shown), which are detection units, to the rebar search location. <Embodiment 3: Concrete wall surface reinforcement condition detection device Effect mainly corresponds to claims 3 and 4>

[0043] The concrete wall reinforcement condition detection device of this embodiment has the advantage of being able to measure both the position of the rebars, such as the depth and arrangement of the buried rebars, and the condition of the rebars themselves, such as whether or not they are corroded (concrete wall reinforcement condition), even if the location where buried rebars are to be detected in a reinforced concrete structure is far away or if there are insurmountable obstacles on the way to the detection location. [Explanation of symbols]

[0044] 0100 Concrete wall reinforcement condition detection device 0120 Adsorption part for walls etc. 0121 Blower 0122 Air intake 0123 Adsorption surface 0130 Electromagnetic Wave Radar (Exploration Section)

Claims

1. A wall surface adsorption portion for adsorbing to a concrete wall surface (sometimes also referred to as a ceiling surface; the same applies below) using negative pressure; An inspection unit for inspecting metal structures inside a concrete wall or the like; A concrete wall reinforcement condition detection device having the above structure.

2. 2. The concrete wall reinforcement condition detection device according to claim 1, wherein the detection unit has a radar detection means and / or an electric resistance detection means.

3. 3. The concrete wall reinforcement condition inspection device according to claim 1, further comprising a flying unit for flying.

4. The concrete wall reinforcement condition inspection device according to claim 3 , wherein the flying unit has a drone function.

5. The concrete wall reinforcement condition detection device according to claim 1 or claim 2, further comprising a wall adsorption movement unit that allows one wall adsorption unit to move from the wall position being adsorbed to another wall position while one wall adsorption unit is adsorbed to one wall.

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