Coating damage position detection device

Abstract

To provide a coating damage position detection device capable of stably measuring a ground surface potential even at locations where the ground is partially inclined.SOLUTION: A coating damage position detection device 1 according to the present disclosure includes a main body 10, and a front wheel electrode 100 and a rear wheel electrode 200 arranged in a front-rear direction of the main body 10. The coating damage position detection device 1 is configured such that at least one of the front wheel electrode 100 and the rear wheel electrode 200 is tiltable with respect to the main body 10.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a coating damage location device. [Background technology]

[0002] There has been disclosed a technology relating to a detection device that detects from above ground the presence and location of a damaged portion of the anticorrosion coating (hereinafter referred to as the damaged portion) of an underground buried object that has an anticorrosion coating on its outer surface. For example, Patent Document 1 discloses a detection device that displays the potential difference of the ground surface detected by the detection device on a display device and detects the presence and location of the damaged portion from the waveform. With this type of detection device, the worker (the operator of the detection device) moves the detection device along the underground buried object, and the potential difference on the ground surface is detected by two wheel electrodes attached to the detection device, allowing the location of the damaged area to be confirmed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Unexamined Patent Publication No. 63-191049 Summary of the Invention [Problem to be solved by the invention]

[0004] In order to stably detect the potential difference in the above-described detection device, it is desirable to ensure a sufficient contact area between the wheel electrodes and the ground. The inventors have devised a detection device in which both wheel electrodes are sufficiently in contact with the ground, even in places where the ground is partially inclined.

[0005] The present disclosure has been made in consideration of the above circumstances, and aims to provide a coating damage location detection device that can stably measure the earth surface potential even in areas where the ground is partially inclined. [Means for solving the problem]

[0006] The coating damage location detection device according to the present disclosure comprises: The main body and front wheel electrodes and rear wheel electrodes arranged side by side in the front-rear direction of the main body; A coating damage location detection device comprising: At least one of the front wheel electrodes and the rear wheel electrodes is tiltable with respect to the body. It is characterized by: [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a coating damage location detection device that can stably measure the ground surface potential even in areas where the ground is partially inclined. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram for explaining a coating damage position detection device according to an embodiment of the present disclosure, and is a schematic side view of the coating damage position detection device as viewed from the right side of the coating damage position detection device. [Figure 2] FIG. 1 is a diagram for explaining a coating damage position detection device according to an embodiment of the present disclosure, and is a schematic side view of the coating damage position detection device as viewed from the front side of the coating damage position detection device. [Figure 3] FIG. 1 is a diagram for explaining a coating damage position detection device according to an embodiment of the present disclosure, and is a schematic side view of the coating damage position detection device as viewed from the rear side of the coating damage position detection device. [Figure 4] 1A and 1B are diagrams for explaining a state in which the wheel electrode of a coating damage position detection device according to one embodiment of the present disclosure is tilted, and are schematic side views of the coating damage position detection device as viewed from the rear side of the device, where (a) shows a state in which the axle is tilted to the left, and (b) shows a state in which the axle is tilted to the right side. [Figure 5] FIG. 1 is a diagram for explaining a coating damage position detection device according to an embodiment of the present disclosure, and is a schematic diagram of the coating damage position detection device as viewed from the bottom side. [Figure 6] FIG. 10 is a diagram for explaining a coating damage position detection device according to another embodiment of the present disclosure, and is a schematic side view of the coating damage position detection device provided with training wheels, as viewed from the right side of the coating damage position detection device. [Figure 7] FIG. 10 is a diagram for explaining a coating damage position detection device according to another embodiment of the present disclosure, and is a schematic side view of the coating damage position detection device provided with training wheels, as viewed from the front side of the coating damage position detection device. [Figure 8] FIG. 10 is a diagram for explaining a coating damage position detection device according to another embodiment of the present disclosure, and is a schematic side view of a coating damage position detection device in which an auxiliary wheel is provided on the front wheel electrode side of the coating damage position detection device, as viewed from the right side of the coating damage position detection device. [Figure 9] 1 is a diagram for explaining an overview of a coating damage location detection system using a coating damage location detection device according to the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present disclosure will be described using examples, but it is clear that the present disclosure is not limited to the examples described below. In the following description, specific numerical values ​​and materials may be used as examples, but other numerical values ​​and materials may be used as long as the effects of the invention according to the present disclosure are obtained. Furthermore, the components of the following embodiments can be combined with each other. In addition, in this specification, a numerical range expressed using "to" means a range that includes the numerical values ​​before and after "to" as the lower and upper limits.

[0010] [First embodiment] Hereinafter, a coating damage location detection device according to an embodiment of the present disclosure will be described with reference to the drawings. The coating damage location detection device 1 according to this embodiment includes a main body 10, and a front wheel electrode 100 and a rear wheel electrode 200 arranged side by side in the front-to-rear direction of the main body 10. Each component of the coating damage location detection device 1 will be described below.

[0011] (Main body) As shown in FIG. 1, the main body 10 according to this embodiment includes a front surface 10a, a rear surface 10b, a right side surface 10c, a left side surface 10d, a top surface 10e, and a bottom surface 10f. FIG. 1 is a schematic side view of the coating damage position detection device 1 as seen from the right side surface 10c side (positive side of the Y coordinate axis) of the coating damage position detection device 1.

[0012] The direction in which the front surface 10a and rear surface 10b of the main body 10 are aligned is the front-to-rear direction of the main body 10, the direction in which the right side surface 10c and left side surface 10d are aligned is the left-to-right direction of the main body 10, and the direction in which the top surface 10e and bottom surface 10f are aligned is the vertical direction of the main body 10. The X coordinate axis in Figure 1 etc. is parallel to the front-to-rear direction of the main body 10, the Y coordinate axis is parallel to the left-to-right direction of the main body 10, and the Z coordinate axis is parallel to the up-to-down direction of the main body 10. The X coordinate axis, Y coordinate axis, and Z coordinate axis in Figure 1 etc. are mutually orthogonal. That is, the front-to-rear direction, left-to-right direction, and up-to-down direction of the main body 10 are also mutually orthogonal.

[0013] A handle 20 is provided on the rear surface 10b side of the main body 10. By gripping and operating the handle 20, an operator of the coating damage location detection device 1 can move the coating damage location detection device 1 forward or backward in the forward / backward direction, or turn it left or right. Although not shown, the handle 20 may be connected to a rotating plate 240 (described later) via a gear, a chain, or the like, so as to be able to control the rotation of the rotating plate 240. With such a configuration, the direction in which the coating damage position detection device 1 moves can be easily controlled by operating the handle 20.

[0014] Although not shown, the main body 10 may be equipped with a laptop computer, a display, or other devices. The shape of the main body 10 is not limited to the shape exemplified in FIG.

[0015] (Wheel electrode) The coating damage location detection device 1 according to the present disclosure includes a front wheel electrode 100 and a rear wheel electrode 200, and at least one of the front wheel electrode 100 and the rear wheel electrode 200 is tiltable relative to the main body 10. In the coating damage position detection device 1 of this embodiment, only the rear wheel electrode 200 is tiltable with respect to the main body 10.

[0016] As shown in FIG. 1, the front wheel electrode 100 is disposed on the front side (front surface portion 10a side) of the main body 10 in the front-rear direction. FIG. 2 is a schematic side view of the coating damage position detection device 1 as seen from the front side of the coating damage position detection device 1, that is, from the front surface 10a side (positive side of the X coordinate axis).

[0017] The front wheel electrode 100 is supported by a front wheel support part 110. The upper side of the front wheel support part 110 in the vertical direction is connected to the main body 10. The lower side of the front wheel support part 110 in the vertical direction is provided with a first hole part (not shown) through which the axle 111 of the front wheel electrode 100 is inserted, and the front wheel electrode 100 is supported via the axle 111. The front wheel electrode 100 is supported by the axle 111 relative to the front wheel support part 110 so as to be rotatable around the axle 111.

[0018] In this embodiment, the front wheel support part 110 is fixed to the main body 10 and is not tiltable relative to the main body 10. The axis CF of the axle 111 is parallel to the left-right direction of the main body 10. If an imaginary line B is defined as an imaginary line that passes through the bottom surface of the main body 10 and extends in the left-right direction of the main body 10, the imaginary line B and the axis CF of the axle 111 of the front wheel electrode 100 are parallel to each other.

[0019] The rear wheel electrode 200 is arranged on the rear side (toward the rear surface portion 10b) in the front-rear direction of the main body 10. In other words, the rear wheel electrode 200 is arranged on the rear side of the front wheel electrode 100 in the front-rear direction of the main body 10. The positions of the front wheel electrode 100 and the rear wheel electrode 200 in the front-rear direction are not particularly limited, and they may be arranged with a predetermined distance from each other relative to the main body 10 so that the main body 10 can move stably.

[0020] By providing the front wheel electrode 100 and the rear wheel electrode 200, the potential difference on the ground surface between two points, one wheel electrode and the other wheel electrode, can be detected.

[0021] The coating damage position detection device 1 according to this embodiment is provided with a tilting mechanism 220, which will be described next, so that the rear wheel electrode 200 can tilt in accordance with the inclination of the road.

[0022] (Tilt mechanism) FIG. 3 is a schematic side view of the coating damage position detection device 1 as seen from the rear side of the coating damage position detection device 1, that is, from the rear surface portion 10b side (negative side of the X coordinate axis).

[0023] The rear wheel electrode 200 is equipped with a tilting mechanism 220. The tilting mechanism 220 includes at least a first support part 221 that supports the rear wheel electrode 200, a second support part 222 that connects the first support part 221 and the main body 10, and a tilting shaft 223 that connects the first support part 221 and the second support part 222.

[0024] A second hole (not shown) through which the axle 211 of the rear wheel electrode 200 is inserted is provided on the lower side of the first support portion 221 in the vertical direction, and the rear wheel electrode 200 is supported via the axle 211. The rear wheel electrode 200 is supported by the axle 211 relative to the first support portion 221 so as to be rotatable around the axle 211. A third hole portion (not shown) through which the inclined shaft 223 is inserted is provided on the upper side of the first support portion 221 in the vertical direction, and the inclined shaft 223 is inserted through the third hole portion.

[0025] The second support part 222 connects the main body 10 and the first support part 221. The upper side of the second support part 222 in the vertical direction is fixed to the main body 10. A fourth hole part (not shown) through which the inclined shaft 223 is inserted is provided on the lower side of the second support part 222 in the vertical direction, and the inclined shaft 223 is inserted into the fourth hole part.

[0026] The inclined shaft 223 allows the first support part 221 and the second support part 222 to rotate relatively around the axis line CT of the inclined shaft 223. In addition, the second hole part, through which the axle 211 is inserted, and the third hole part, through which the inclined shaft 223 is inserted, which are provided in the first support part 221, are provided so that the axle 211 and the inclined shaft 223 are perpendicular to each other. With this configuration, the axle 211 of the rear wheel electrode 200 can rotate around the axis line CT of the inclined shaft 223 with respect to the main body 10. In other words, the rear wheel electrode 200 is inclined in a plane perpendicular to the axis line CT of the inclined shaft 223.

[0027] 1 or 2, the tilt axis 223 is parallel to the X coordinate axis. Also, in the state shown in Fig. 1 or 2, the axle 211 of the rear wheel electrode 200 is parallel to the Y coordinate axis. Also, in the state shown in Fig. 2, the imaginary line B and the axis CR of the axle 211 are parallel to each other. The state shown in FIG. 1 or FIG. 2 is, for example, a state in which the coating damage position detecting device 1 is placed on a horizontal ground or is moving on a horizontal ground.

[0028] In conventional devices, when the inclinations of the ground surfaces where the front wheel electrodes and the rear wheel electrodes are in contact are different, the front wheel electrodes or the rear wheel electrodes may only be partially in contact with the ground. Furthermore, tilting the device to ensure sufficient contact between the wheel electrodes and the ground may cause the device to become unstable. In contrast, in the coating damage location detection device 1 according to this embodiment, even if the ground on which the front wheel electrode 100 and the rear wheel electrode 200 are in contact have different inclinations, the rear wheel electrode 200 can be tilted relative to the main body 10, allowing the front wheel electrode 100 and the rear wheel electrode 200 to be sufficiently grounded to the ground. This allows the coating damage location detection device according to the above embodiment to stably measure the ground surface potential. As a secondary effect, the coating damage location detection device 1 according to this embodiment has the advantage of easily maintaining the coating damage location detection device 1 horizontal, even if there are inclined areas on the ground on which the coating damage location detection device 1 is moving, because the rear wheel electrode 200 can be tilted relative to the main body 10.

[0029] 4 is a diagram for explaining a state in which the wheel electrode of the coating damage position detection device 1 according to this embodiment is tilted, and is a schematic side view of the coating damage position detection device 1 as seen from the rear surface 10b side of the coating damage position detection device 1. Fig. 4(a) shows a state in which the axle is tilted toward the left side surface 10d, and Fig. 4(b) shows a state in which the axle is tilted toward the right side surface 10c.

[0030] For example, if the ground is inclined toward the left side surface 10d with respect to the traveling direction of the main body 10 (positive direction of the X coordinate axis), the rear wheel electrode 200 will incline toward the left side surface 10d (negative direction of the Y coordinate axis) in accordance with this inclination. 4(a), the first support part 221 is rotatable relative to the second support part 222 around the axis line CT of the tilt shaft 223. Therefore, the rear wheel electrode 200 is tiltable relative to the main body 10. In this case, an imaginary line B passing through the bottom surface of the main body 10 and the axis line CR of the axle 211 form an angle with each other.

[0031] Furthermore, if the ground is inclined toward the right side surface 10c with respect to the traveling direction of the main body 10 (positive direction of the X coordinate axis), the rear wheel electrode 200 will incline toward the right side surface 10c (positive direction of the Y coordinate axis) in accordance with this inclination. In this case, as shown in FIG. 4(b), the rear wheel electrode 200 is inclined relative to the main body 10, and an imaginary line B passing through the bottom surface of the main body 10 and the axis CR of the axle 211 form an angle with each other.

[0032] The tilt angle of the rear wheel electrode 200 is preferably limited by a stopper 224 . The stopper 224 is not particularly limited as long as it can limit the relative rotation between the first support portion 221 and the second support portion 222, and may be, for example, a protruding member as shown in FIG. 1 etc. The stopper 224 is provided, for example, on the first support portion 221. It is configured so that when the first support portion 221 and the second support portion 222 rotate relatively around the axis line CT of the tilt shaft 223, the protruding stopper 224 provided on the first support portion 221 abuts against the second support portion 222. As a result, when the rear wheel electrode 200 is tilted with respect to the main body 10, the second support portion 222 abuts against the stopper 224, thereby limiting further tilting of the rear wheel electrode 200.

[0033] Furthermore, the maximum tilt angle of the rear wheel electrode 200 can be controlled by the position of the stopper 224. For example, the maximum tilt angle of the rear wheel electrode 200 can be adjusted by the stopper 224 according to the height-direction center of gravity position of the coating damage position detection device 1, thereby enabling more stable movement. The tilt angle of the rear wheel electrode 200 is the angle of the axis CR of the axle 211 when tilted relative to the axis CR of the axle 211 in a horizontal state as shown in FIG. 3. For example, the maximum tilt angle of the rear wheel electrode 200 is 10 degrees. If the tilt angle of the rear wheel electrode 200 is within 10 degrees, more stable movement is possible. 3 etc., the stoppers 224 are preferably arranged in pairs on both sides of the inclined shaft 223. By providing the stoppers 224, it is possible to prevent the coating damage position detection device 1 from falling over due to excessive tilting of the wheel electrode.

[0034] In this embodiment, a coating damage location detection device 1 has been described in which only the rear wheel electrode 200 is tiltable relative to the main body 10. In such a coating damage location detection device 1, the front wheel electrode 100 does not tilt, which has the advantage that the main body 10 is less likely to tip over when moved, making it easier to push the coating damage location detection device 1 forward. Another advantage is that the rear wheel electrode 200 is closer to the handle 20, which makes it easier to tilt the main body 10. However, a tilting mechanism similar to the tilting mechanism 220 of this embodiment may be adopted for the front wheel electrode 100, so that both the front wheel electrode 100 and the rear wheel electrode 200 can be tilted. This has the advantage of increasing the contact areas of the front wheel electrode 100 and the rear wheel electrode 200 with the ground, allowing for more accurate measurement of the earth surface potential. Alternatively, only the front wheel electrode 100 may be tiltable relative to the main body 10. This has the advantage that the main body 10 is less likely to tip over when moved, making it easier to push the coating damage location detection device 1 forward.

[0035] The front wheel electrodes 100 and the rear wheel electrodes 200 may be configured, for example, by six wheels arranged side by side in the direction along the respective axles, with a space between them provided by spacers or the like. The front wheel electrode 100 and the rear wheel electrode 200 are preferably made of, for example, conductive sponge rubber wheels.

[0036] FIG. 5 is a schematic diagram of the coating damage position detection device 1 as viewed from the bottom surface 10f side (negative side of the Z coordinate axis). 5, a rotating plate 240 may be provided on the bottom surface portion 10f. When the rotating plate 240 is provided, the tilting mechanism 220 is connected to the rotating plate 240. The rotating plate 240 is rotatable relative to the main body 10 in the up-down direction of the main body 10 (arrow R). The rotation of the rotating plate 240 may be controlled by operating the handle 20. For example, by pointing the handle 20 to the right of the main body 10, the rotating plate 240 may be turned to the right, and the coating damage position detection device 1 may be configured to turn to the right in the traveling direction.

[0037] The coating damage location detection device according to the above embodiment can ground the wheel electrodes sufficiently to the ground even in areas where the ground is partially inclined, so that the coating damage location detection device according to the above embodiment can stably measure the ground surface potential.

[0038] [Second embodiment] The coating damage position detecting device 1 according to this embodiment has the same basic configuration as the coating damage position detecting device 1 according to the first embodiment, but differs in that it further includes training wheels 300 . Hereinafter, for the coating damage position detection device 1 according to this embodiment, the description of the same configuration as that of the first embodiment will be omitted.

[0039] The coating damage position detection device 1 according to this embodiment includes auxiliary wheels 300 arranged outside the front wheel electrodes 100 and the rear wheel electrodes 200 in the left-right direction of the main body 10.

[0040] 6 and 7 show a coating damage position detection device 1 provided with training wheels 300. Fig. 6 is a schematic side view of the coating damage position detection device 1 as viewed from the right side of the coating damage position detection device 1, i.e., from the right side surface 10c side, and Fig. 7 is a schematic side view of the coating damage position detection device 1 as viewed from the front surface 10a side of the coating damage position detection device 1.

[0041] Training wheel 300 is connected to main body 10 via third support portion 310 and fourth support portion 320. A fifth hole portion (not shown) through which axle 311 of training wheel 300 is inserted is provided on the lower side of third support portion 310 in the vertical direction, and supports training wheel 300 via axle 311. Training wheel 300 is supported by axle 311 relative to third support portion 310 so as to be rotatable around axle 311. The third support part 310 is provided at its upper side in the vertical direction with a sixth hole part (not shown) through which the shaft 312 is inserted.

[0042] The fourth support part 320 connects the main body 10 and the third support part 310. The upper side of the fourth support part 320 in the vertical direction is fixed to the main body 10. A seventh hole (not shown) through which the shaft 312 is inserted is provided on the lower side of the fourth support portion 320 in the vertical direction, and the shaft 312 is inserted into the seventh hole.

[0043] The shaft 312 allows the third support part 310 and the fourth support part 320 to rotate relatively around the axis of the shaft 312, and the third support part 310 and the training wheel 300 move relatively to the fourth support part 320 around the shaft 312.

[0044] A spring 330 is provided between the third support portion 310 and the fourth support portion 320. The third support portion 310 and the fourth support portion 320 are biased by the spring 330, and when no force is applied to the spring 330, the relative positions of the third support portion 310 and the fourth support portion 320 are fixed. The direction of extension and contraction of spring 330 of third support part 310 is perpendicular to the axial direction of shaft 312. Therefore, movement of third support part 310 relative to fourth support part 320 around the axis of shaft 312 is suppressed by extension and contraction of spring 330. With this configuration, movement of training wheel 300 relative to main body 10 is suppressed by spring 330. By providing the auxiliary wheels 300 configured in this way, the action of the springs 330 allows stable movement even when the ground is uneven.

[0045] The auxiliary wheels 300 may be disposed between the front wheel electrodes 100 and the rear wheel electrodes 200 in the front-rear direction of the main body 10. This configuration has the advantage of preventing the coating damage position detection device 1 from tipping over when traveling on steep slopes, making sharp turns, traveling on rough roads, etc. The auxiliary wheel 300 being arranged between the front wheel electrode 100 and the rear wheel electrode 200 means, in other words, that the axle 311 of the auxiliary wheel 300 is located between the axle 111 of the front wheel electrode 100 and the axle 211 of the rear wheel electrode 200 in the fore-and-aft direction of the main body 10.

[0046] The training wheels 300 may be arranged so as to overlap the front wheel electrodes 100 in the front-rear direction of the main body 10. With this configuration, the stability is ensured by the training wheels, while the front wheel electrodes 100 or rear wheel electrodes 200 can be prevented from lifting off the ground when going over a step on the ground (such as the boundary between the roadway and the sidewalk, or a median strip), and the earth surface potential can be measured more reliably and stably. 8 shows an example in which the front wheel electrode 100 and the auxiliary wheel 300 are arranged to overlap in the front-rear direction of the main body 10. In other words, when the main body 10 is viewed from the left and right, the front wheel electrode 100 and the auxiliary wheel 300 appear to overlap when the main body 10 is viewed from the left and right.

[0047] There is no particular limitation on the number of training wheels 300. For example, the training wheels may be provided on either the left or right side of the main body 10. 6 and other figures, a pair of auxiliary wheels 300 may be provided on both left and right sides of the main body 10. Alternatively, two pairs of auxiliary wheels 300 may be provided on both left and right sides of the front wheel electrode 100 and on both left and right sides of the rear wheel electrode 200, respectively.

[0048] The training wheels 300 may be off the ground when the main body 10 is placed horizontally. This configuration has the effect of improving the operability of the coating damage position detection device 1, such as its ability to travel straight and turn. The springs 330 may be adjusted to lift the training wheels 300.

[0049] In the coating damage location detection device according to the above embodiment, the wheel electrodes can be grounded sufficiently to the ground even in areas where the ground is partially inclined. Therefore, the coating damage location detection device according to the above embodiment can stably measure the ground surface potential. Furthermore, by providing auxiliary wheels, the coating damage location detection device 1 can be prevented from tipping over due to excessive tilting, and the increased stability of the coating damage location detection device 1 further improves its running performance.

[0050] (Coating damage location detection system) The coating damage position detection device 1 according to each of the above-described embodiments can detect the position of a damaged portion of an underground object having an anticorrosion coating on its outer surface. The underground object is, for example, a buried pipe. The underground object may also be, for example, a metal pipe such as a steel pipe.

[0051] The coating damage location detection device 1 may be used as part of a coating damage location detection system. As shown in FIG. 9, for example, a coating damage position detection system 1000 includes a coating damage position detection device 1 and a measurement signal generator 2.

[0052] In the coating damage location detection system 1000, an AC voltage is applied between the underground buried object b and a counter electrode 22 placed underground (inside the soil) using a measurement signal transmitter 2, and an AC current is passed through. The potential difference on the ground surface between the two points generated by the measurement signal transmitter 2 is detected by the front wheel electrode 100 and rear wheel electrode 200 of the coating damage location detection device 1, which moves along the underground buried object b on the ground directly above the underground buried object b.

[0053] For example, if there is a damaged area bs in an underground buried object b, a current I flows into the underground buried object b through the damaged area bs. This causes a potential difference around the damaged area bs. The potential difference on the ground surface thus generated is detected by the coating damage location detection device 1.

[0054] As explained in the above embodiment, the coating damage position detection device 1 detects the potential difference on the ground surface by the front wheel electrode 100 and the rear wheel electrode 200. The coating damage location detection device 1 continuously detects the potential difference on the ground surface while moving along the underground buried object b on the ground directly above the underground buried object b via the front wheel electrodes 100 and the rear wheel electrodes 200. In detail, the operator moves the coating damage location detection device 1 along the underground buried object b on the ground above the underground buried object b, and the front wheel electrodes 100 and the rear wheel electrodes 200 of the coating damage location detection device 1 detect the potential difference between two points on the ground surface as a detection signal.

[0055] The detected potential difference is input as a signal to a signal processing device mounted on the main body, processed by the signal processing device, and then output as information such as a waveform to a display device.

[0056] It should be noted that the technical scope of the present disclosure is not limited to the above-described embodiments, and it is obvious that various modifications can be made without departing from the spirit of the present disclosure. Within the scope of the present disclosure, the components in each of the above embodiments may be replaced with well-known components as appropriate, and the above-described variations may be combined with each of the above embodiments as appropriate.

[0057] (Addendum) The coating damage position detection device according to the above embodiment can be understood, for example, as follows. (1) A coating damage location detection device according to one aspect of the present disclosure includes: The main body and front wheel electrodes and rear wheel electrodes arranged side by side in the front-rear direction of the main body; A coating damage location detection device comprising: At least one of the front wheel electrodes and the rear wheel electrodes is tiltable with respect to the body. It is characterized by: The coating damage location detection device having the above configuration can ground the wheel electrodes sufficiently to the ground even in areas where the ground is partially inclined, so the coating damage location detection device according to the above embodiment can stably measure the ground surface potential.

[0058] (2) In the coating damage location detection device described in (1) above, Only the rear wheel electrodes may be tiltable relative to the body. Since only the rear wheel electrodes can be tilted relative to the main body, the front wheel electrodes do not tilt, which makes it difficult for the main body to tip over when moved, and has the advantage that it is easy to push the coating damage location detection device forward. Also, since the rear wheel electrodes are close to the handle, there is the advantage that the main body can be tilted easily.

[0059] (3) In the coating damage location detection device described in (1) or (2) above, The vehicle may further include auxiliary wheels arranged outward of the front wheel electrodes and the rear wheel electrodes in the left-right direction of the main body. Providing the auxiliary wheels has the advantage that the coating damage position detection device can be prevented from tilting excessively and tipping over, and the stability of the coating damage position detection device is increased, thereby further improving its running performance.

[0060] (4) In the coating damage location detection device described in (3) above, The auxiliary wheels may be disposed between the front wheel electrodes and the rear wheel electrodes in the front-rear direction of the main body. The above-described configuration has the advantage that the coating damage position detection device can be prevented from tipping over when moving along a steep slope, making a sharp turn, or traveling on a rough road.

[0061] (5) In the coating damage location detection device described in (3) above, The front wheel electrode and the auxiliary wheel may be arranged to overlap in the front-rear direction of the main body. The above configuration has the advantage that, while the auxiliary wheels ensure stability, the wheel electrodes can be prevented from lifting off the ground when going over bumps in the ground, allowing for more reliable and stable measurement of the earth surface potential.

[0062] (6) In the coating damage location detection device according to any one of (1) to (5), a wheel electrode that is tiltable relative to the body and is connected to the body via a tilt mechanism; the tilting mechanism includes a tilting shaft and a pair of stoppers disposed on both sides of the tilting shaft, The wheel electrode is inclined in a plane perpendicular to the axis of the inclination shaft, The stopper may limit the tilt angle of the wheel electrode. The above-described configuration has the advantage of preventing the coating damage position detection device from tipping over due to excessive tilting of the wheel electrode. [Industrial Applicability]

[0063] The coating damage location detection device according to the present disclosure can stably measure the ground surface potential even in areas where the ground is partially inclined, making the present disclosure extremely useful in industry. [Explanation of symbols]

[0064] 1. Coating damage location detection device 10 Main Unit 20 Handle 100 front wheel electrode 200 Rear wheel electrode 220 Tilt mechanism 300 Training wheels

Claims

1. The main body and front wheel electrodes and rear wheel electrodes arranged side by side in the front-rear direction of the main body; A coating damage location detection device comprising: At least one of the front wheel electrodes and the rear wheel electrodes is tiltable with respect to the body. A coating damage location detection device characterized by:

2. Only the rear wheel electrodes are tiltable relative to the body.

2. The coating damage location detection device according to claim 1.

3. further comprising auxiliary wheels arranged outward of the front wheel electrodes and the rear wheel electrodes in the left-right direction of the main body; 3. The coating damage location detection device according to claim 1 or 2.

4. the auxiliary wheels are disposed between the front wheel electrodes and the rear wheel electrodes in the front-rear direction of the main body; 4. The coating damage location detection device according to claim 3.

5. the front wheel electrodes and the auxiliary wheels are arranged to overlap in the front-rear direction of the main body; 4. The coating damage location detection device according to claim 3.

6. a wheel electrode that is tiltable relative to the body and is connected to the body via a tilt mechanism; the tilting mechanism includes a tilting shaft and a pair of stoppers disposed on both sides of the tilting shaft, The wheel electrode is inclined in a plane perpendicular to the axis of the inclination shaft, The stopper limits the tilt angle of the wheel electrode.

3. The coating damage location detection device according to claim 1 or 2.

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