JP6846742B2 - Tapping sound inspection device - Google Patents

Description

The present invention relates to a tapping sound inspection device for inspecting tapping sound of a structure (inspection target) such as concrete or asphalt.

Conventionally, the operator listens to the striking sound (striking sound) generated when the inspection target is hit with a hammer, and manually records the part where an abnormality is felt. In this inspection, the exact inspection position may not be recorded.

Therefore, a device has been proposed that records a striking sound and a striking position while moving following an operator (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-50876

However, since the device described in Patent Document 1 is configured to record the striking sound and the striking position while moving following the operator, it includes sounds (noise) other than the striking sound to be analyzed. There is a problem that it is not possible to record an accurate hitting sound because it is picked up by.

That is, when recording the sound transmitted through the air, the sound picked up by the environmental sound such as the sound emitted by the device itself or the reverberant sound in the tunnel is not included, and when the contact type vibration sensor is used, it is not included in the sound picked up. The vibration of the contact surface due to movement is included in the picked up sound.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a hitting sound inspection device capable of recording an accurate hitting sound and a hitting position.

The invention according to claim 1 is a tapping sound inspection device that records a tapping sound and a striking position when the inspection target is hit with an inspection instrument, and the tapping sound generated by the striking in contact with the inspection target. a tapping sound detection unit for detecting the placed against inspected in a predetermined position in a predetermined posture, possess a hitting position detecting unit for detecting a position of a portion the batting has been, the hitting position detecting The unit is configured to detect the position where the impact of the inspection target is made by detecting the inspection instrument that temporarily passes through the planar detection area for the impact and blocks it. The planar detection region is parallel to the plane of the inspection target to be hit or substantially parallel to the plane surface of the inspection target to be hit, and is from the plane or plane surface of the inspection target to be hit. It is slightly separated, and the hitting sound detected by the hitting sound detection unit at a predetermined time and the position of the hitting portion detected by the hitting position detecting unit at the predetermined time are stored in association with each other. It is a tapping sound inspection device having a storage device.

The invention according to claim 2 is the tapping sound inspection device according to claim 1, wherein the tapping sound detection unit is installed at a predetermined position in a non-moving state with respect to the inspection target. The striking position detection unit is installed at a predetermined position in the vicinity of the striking sound detection unit in a non-moving state together with the striking sound detection unit at a position away from the inspection target portion to be struck by the inspection instrument. It is a tapping sound inspection device that is designed to be used.

The invention according to claim 3 is the tapping sound inspection device according to claim 1 or 2, wherein the posture of the impact position detection unit with respect to the inspection target is finely adjusted to obtain the impact position detection unit. It is a tapping sound inspection device having an installation support unit that is installed in a predetermined posture with respect to the inspection target.

The invention according to claim 4 is the tapping sound inspection device according to any one of claims 1 to 3, wherein the planar detection region and the planar surface to be inspected are substantially parallel to each other. It is a tapping sound inspection device having a posture display unit indicating whether or not the device is used.

The invention according to claim 5 is the tapping sound inspection device according to claim 4, wherein the posture display unit is provided on the impact position detection unit and is provided on a flat surface or a flat surface to be inspected. A first light emitting unit that emits a laser beam or a beam light toward the surface, and a second light emitting unit that is provided in the striking position detecting unit and emits a laser beam or a beam light toward a flat surface or a flat surface to be inspected. The intersection angle between the plane or plane surface of the inspection target and the optical axis of the laser light or beam light emitted by the first light emitting unit is the plane or plane of the inspection target. This is a tapping sound inspection device having a different angle of intersection between the surface of the shape and the optical axis of the laser beam or beam light emitted by the second light emitting unit.

According to the present invention, there is an effect that an accurate hitting sound and hitting position can be recorded.

It is a figure which shows the tapping sound inspection apparatus which concerns on embodiment of this invention, and the state which this tapping sound inspection apparatus is installed in the inspection target. FIG. 2 is a view taken along the line II in FIG. It is a figure which shows the posture display part of the tapping sound inspection apparatus which concerns on embodiment of this invention, (a) is the figure which shows the state which the hitting position detection part is installed in the correct posture with respect to the inspection object (a). b) is a diagram showing a state in which the striking position detecting unit is installed in an incorrect posture (tilted posture) with respect to the inspection target. It is a block diagram which shows the structure of the tapping sound inspection apparatus which concerns on embodiment of this invention. It is a block diagram which shows the structure of the tapping sound inspection apparatus which concerns on a modification. It is a block diagram which shows the structure of the tapping sound inspection apparatus which concerns on a modification. It is a block diagram which shows the structure of the tapping sound inspection apparatus which concerns on a modification. It is a figure which shows the operation of the tapping sound inspection apparatus. It is a figure which shows the measurement target area when the protrusion exists in the inspection target.

As shown in FIGS. 1 and 2, the tapping sound inspection device 1 according to the embodiment of the present invention strikes the inspection target 5 with the inspection instrument (striking instrument) 7 (for example, with the hammer 7) when the worker 3 strikes the inspection target 5. It is a device that records the striking sound and the striking position in relation to each other, and is a striking sound detecting unit (striking sound detecting means; contact type vibration sensor) 9 and a striking position detecting unit (striking position detecting means) 11. It is configured with and.

The tapping sound detection unit 9 is installed in a predetermined position with respect to the inspection target 5 in a non-moving state. Further, the tapping sound detection unit 9 comes into contact with the inspection target 5 at a distance from the part 13 of the inspection target 5 struck by the hammer 7, and the tapping sound generated by the impact by the hammer 7 (transmitted to the inspection target 5). It is designed to detect the tapping sound).

The striking position detecting unit 11, together with the striking sound detecting unit 9, is determined in a predetermined posture with respect to the inspection target 5 in the vicinity of the striking sound detecting unit 9 at a position away from the portion 13 of the inspection target 5 hit by the hammer 7. It is designed to be installed in a non-moving state at the position of. Further, the striking position detecting unit 11 detects the position of the portion (striking position) 13 of the inspection target 5 that has been impacted by the hammer 7.

The inspection target 5 is provided with a flat or flat surface (for example, a wall surface) 15 having a predetermined size, and the impact by the hammer 7 is a predetermined portion of the flat or flat surface 15 of the inspection target 5. It is done by hitting (position) 13.

As the inspection target 5, for example, a slab of a plate-shaped road made of concrete or asphalt or a wall of a tunnel can be raised. In addition, in FIG. 1 and FIG. 2, the plane 15 of the inspection target 5 is developed in the vertical direction, but the plane of the inspection target 5 may be developed in the horizontal direction or is developed in the diagonal direction. May be good.

Further, instead of or in addition to detecting the sound (audible sound) by the tapping sound detecting unit 9, vibration such as an inaudible sound generated when the inspection target 5 is hit with the hammer 7 may be detected.

The striking position detection unit 11 detects the inspection instrument 7 (for example, the head 7A of the hammer) that has passed through the flat detection area (measurement target area) 17 for striking, thereby striking the inspection target 5. It is configured to detect the position. The planar detection region 17 is parallel to the plane of the inspection target 5 to be impacted or substantially parallel to the planar surface 15 of the inspection target 5 to be impacted, and slightly from the surface 15 of the inspection target 5 to be impacted. is seperated.

As the tapping sound detection unit 9, for example, a supermagnetostrictive material contact type audio device (model; JB-GM03) manufactured by Jibog Co., Ltd. is used, and as the striking position detection unit 11, for example, a range sensor manufactured by Hokuyo Electric Co., Ltd. ( Two-dimensional laser range finder; model; HOKUYO UST-10LX) is used.

The two-dimensional laser range finder 11 rotates the optical system in the two-dimensional laser range finder 11 to emit the laser beam into the planar detection region 17 to scan the planar detection region 17. It has become.

That is, when the head 7A of the hammer 7 passes through the area 17 to be scanned for hitting the inspection target, the two-dimensional laser range finder 11 is reflected by the head 7A of the hammer 7 and returns. It is designed to detect laser light.

Further explaining, the difference (time) between the time when the laser beam is emitted and the time when the laser beam reflected by the head 7A of the hammer 7 is detected and the time when the laser beam is detected can be measured from the two-dimensional laser range finder 11 to the inspection target 5. The optical system when the distance r (see FIG. 2) to the hit portion 13 (head 7A of the hammer 7) is determined and the laser beam reflected and returned by the head 7A of the hammer 7 is emitted. The deviation angle θ (see FIG. 2) of the impacted portion 13 of the inspection target 5 is determined by the rotation angle of.

The value of the distance between the planar detection area (scan area of the two-dimensional laser range finder 11) 17 of the impact position detection unit 11 and the surface (planar surface) 15 of the inspection target 5 that is substantially parallel to this is the value of the distance. For example, in order to detect only the head 7A of the hammer 7 and not to detect the handle 7B of the hammer 7, the amount of protrusion of the head 7A from the handle 7B of the hammer 7 is smaller than the value.

The distance between the planar detection region 17 and the planar (planar surface) 15 is preferably about 10 mm to 40 mm.

Further, the tapping sound inspection device 1 includes a vibration absorbing unit (vibration absorbing means; for example, a damper made of rubber, synthetic resin, or the like) 19 and a control unit 25 including a CPU 21 and a memory 23. An installation support unit (installation support unit means; for example, a pan head for an optical device such as a camera) 27 and an attitude display unit 29 are provided. The vibration absorbing portion 19 may be composed of an aluminum block and a thick tape. Further, in the embodiment shown in FIG. 1, the tapping sound inspection device 1 is provided with, for example, a support member 20 formed in an “L” shape, and the two-dimensional laser range finder 11 is attached to the support member 20. It is provided integrally. Further, the contact type vibration sensor 9 is integrally provided on the support member 20 via the vibration absorbing unit 19. Here, the support member 20 may be composed of an aluminum block and a thick double-sided tape. For example, the aluminum block may be integrally provided on the support member 19 with the double-sided tape, or the contact type vibration sensor 9 may be provided on both sides. It may be provided integrally with the aluminum block by tape.

The vibration absorbing unit 19 is provided so that the sound or vibration generated when the inspection target 5 is hit by the hammer 7 is not transmitted to the hitting position detecting unit 11. Further, the control unit 25 records the hitting sound when the inspection target 5 is hit with the hammer 7 and the hitting position 13 in the memory 23 in association with each other.

The installation support unit 27 finely adjusts the postures of the tapping sound detection unit 9 and the striking position detection unit 11 with respect to the inspection target 5, and causes the striking sound detection unit 9 and the striking position detection unit 11 to be directed to the inspection target 5. It is designed to be installed in a predetermined position in a predetermined posture.

The tapping sound detection unit 9 and the striking position detection unit 11 installed in the installation support unit 27 are integrated with each other, for example. Therefore, the posture and position of the tapping sound detection unit 9 and the striking position detection unit 11 installed at a predetermined position with respect to the inspection target 5 by the installation support unit 27 with respect to the inspection target 5 are constant. It has become a thing.

The posture display unit 29 indicates that the striking position detecting unit 11 and the striking sound detecting unit 9 using the installation support unit 27 are installed in a predetermined posture with respect to the inspection target 5. That is, it indicates whether or not the planar scan area 17 of the two-dimensional laser range finder 11 and the planar (planar surface) 15 of the inspection target 5 are substantially parallel to each other.

More specifically, as shown in FIG. 3, the posture display unit 29 includes a first light emitting unit 31 and a second light emitting unit 33.

The first light emitting unit 31 is integrally provided with the impact position detecting unit 11, and emits laser light (or beam light) having a small beam diameter toward the flat surface or the flat surface 15 of the inspection target 5. It has become like. More specifically, the laser beam emitted by the first light emitting unit 31 is reflected by the mirror 34 integrally provided in the striking position detecting unit 11 and irradiates the flat surface or the flat surface 15 of the inspection target 5. It is supposed to be done.

The second light emitting unit 33 is integrally provided in the striking position detecting unit 11, and emits laser light (or beam light) having a small beam diameter toward the flat surface or the flat surface 15 of the inspection target 5. It has become like.

The intersection angle θ1 between the surface 15 of the inspection target 5 and the optical axis L1 of the laser light emitted by the first light emitting unit 31 is the optical axis of the laser light emitted by the surface 15 of the inspection target 5 and the second light emitting unit 33. It is different from the intersection angle θ2 with L2.

Hereinafter, a case where each of the light emitting units 31 and 33 emits laser light and the surface 15 of the inspection target 5 to which the laser light is irradiated is a flat surface will be described as an example.

The optical axis L1 of the laser light emitted by the first light emitting unit 31 and the optical axis L2 of the laser light emitted by the second light emitting unit 33 exist in the first plane 35. The first plane 35 is the paper surface of FIG. 3, and in FIG. 2, it is the plane indicated by the optical axes (straight lines) L1 and L2 indicating the optical axis. More specifically, the first plane 35 includes, for example, the center Ca of the two-dimensional laser range finder 11 (see FIG. 2) and is orthogonal to the planar region 17 scanned by the two-dimensional laser range finder 11. It is one plane.

Strike position detection unit 11 (striking sound) with respect to the plane 15 of the inspection target 5 around the axis (axis orthogonal to the paper surface of FIG. 3) C1 (see FIG. 2) orthogonal to the first plane 35. By changing the posture (rotation angle) of the detection unit 9), the postures of the light emitting units 31 and 33 with respect to the plane 15 of the inspection target 5 around the axis C1 orthogonal to the first plane 35 can also be obtained. Change.

As a result, the position of the irradiation portion (bright spot; dot-shaped irradiation portion) 37 formed on the flat surface 15 of the inspection target 5 is changed by the light emission of the first light emitting unit 31, and the light emission of the second light emitting unit 33. The position of the irradiation site (bright spot; dot-shaped irradiation site) 39 formed on the flat surface 15 of the inspection target 5 changes.

Then, the operator 3 sees the positions of the irradiation sites 37 and 39 formed on the flat surface 15 of the inspection target 5 by the light emitted from the first light emitting unit 31 and the second light emitting unit 33, so that the striking position detecting unit It is possible to know the posture (posture around the axis C1) of 11 with respect to the inspection target 5.

For example, by changing the posture of the striking position detecting unit 11 with respect to the plane 15 of the inspection target 5, the position of the irradiation portion 37 formed on the plane 15 of the inspection target 5 by the light emission of the first light emitting unit 31 and the second position of the irradiation portion 37. The position of the irradiation portion 39 formed on the plane 15 of the inspection target 5 changes due to the light emission of the light emitting unit 33.

Then, as shown in FIG. 3A, when the position of the irradiation site 37 and the position of the irradiation site 39 coincide with each other, the impact position detection unit around the axis C1 orthogonal to the first plane 35 It can be known that the posture of 11 is the target posture. The target posture is a posture in which the central axis C2 of the cylindrical two-dimensional laser range finder 11 is orthogonal to the plane 15 of the inspection target 5 when viewed from a direction orthogonal to the first plane 35 (FIG. The posture in which the angle θa shown in 3 (a) is 90 °).

On the other hand, as shown in FIG. 3B, when the posture of the striking position detecting unit 11 around the axis C1 orthogonal to the first plane 35 deviates from the target posture (cylindrical two-dimensional). When the central axis C2 of the laser range finder 11 is not orthogonal to the plane 15 of the inspection target 5), the position of the irradiation site 39 deviates from the position of the irradiation site 37.

The plane 15 shown by the broken line in FIG. 3B is a plane when the posture of the striking position detecting unit 11 around the axis C1 orthogonal to the first plane 35 is the target posture (? It is a plane shown in FIG. 3 (a).

Further, the wavelength of the laser light emitted by the first light emitting unit 31 (for example, red) and the wavelength of the laser light emitted by the second light emitting unit 33 (for example, green) are different from each other.

As shown in FIG. 3, the posture display unit 29 includes a third light emitting unit 41 and a fourth light emitting unit 43 similar to the first light emitting unit 31 and the second light emitting unit 33. That is, the posture display unit 29 is integrally provided with the impact position detection unit 11, and is a third light emitting unit 41 that emits laser light (which may be beam light) having a small beam diameter toward the plane 15 of the inspection target 5. And a fourth light emitting unit 43 that is integrally provided in the impact position detecting unit 11 and emits a laser beam (which may be a beam light) having a small beam diameter toward the plane 15 of the inspection target 5. ing.

The laser beam emitted by the third light emitting unit 41 is reflected by the mirror 34 integrally provided in the striking position detecting unit 11 and is irradiated on the flat surface 15 of the inspection target 5.

Similar to the case of the first light emitting unit 31 and the second light emitting unit 33, the intersection angle θ3 between the plane 15 of the inspection target 5 and the optical axis L3 of the laser beam emitted by the third light emitting unit 41 is the inspection target. The angle of intersection θ4 between the plane 15 of 5 and the optical axis L4 of the laser beam emitted by the fourth light emitting unit 43 is different.

Further, the optical axis L3 of the laser light emitted by the third light emitting unit 41 and the optical axis L2 of the laser light emitted by the fourth light emitting unit 43 exist in the second plane 45 (see FIG. 2). There is.

The second plane 45 is orthogonal to, for example, the planar region 17 including the center Ca of the two-dimensional laser range finder 11 and scanned by the two-dimensional laser range finder 11, and is formed on the first plane 35. It is a plane that intersects (for example, orthogonally) with respect to it.

In FIG. 3, the first plane 35 (right side in FIG. 3) and the second plane 45 (left side in FIG. 3) are drawn on one plane, but in reality, the first plane 35 and The second plane 45 is orthogonal to each other.

By changing the posture (rotation angle) of the impact position detection unit 11 with respect to the plane 15 of the inspection target 5 around the axis C3 orthogonal to the second plane 45, the inspection target 5 is orthogonal to the second plane 45. The postures of the light emitting portions 41 and 43 with respect to the plane 15 of the inspection target 5 around the axis C3 are also changed.

As a result, the position of the irradiation portion 47 formed on the flat surface 15 of the inspection target 5 is changed by the light emission of the third light emitting unit 41, and is formed on the flat surface 15 of the inspection target 5 by the light emission of the fourth light emitting unit 43. The position of the irradiation site 49 changes.

Then, the operator 3 sees the positions of the irradiation sites 47 and 49 formed on the flat surface 15 of the inspection target 5 by the light emitted from the third light emitting unit 41 and the fourth light emitting unit 43, so that the striking position detecting unit It is possible to know the posture (posture around the axis C3) of the inspection target 5 of 11 with respect to the plane 15.

For example, by changing the posture of the striking position detecting unit 11 with respect to the plane 15 of the inspection target 5, the position of the irradiation portion 47 formed on the plane 15 of the inspection target 5 by the light emission of the third light emitting unit 41 and the position of the fourth The position of the irradiation site 49 formed on the flat surface 15 of the inspection target 5 changes due to the light emission of the light emitting unit 43.

Then, as shown in FIG. 3A, when the position of the irradiation site 47 and the position of the irradiation site 49 coincide with each other, the impact position detection unit around the axis C3 orthogonal to the second plane 45 It can be known that the posture of 11 is the target posture. The target posture is a posture in which the central axis C2 of the cylindrical two-dimensional laser range finder 11 is orthogonal to the plane 15 of the inspection target 5 when viewed from a direction orthogonal to the second plane 45. ..

On the other hand, as shown in FIG. 3B, when the posture of the striking position detecting unit 11 around the axis C3 orthogonal to the second plane 45 deviates from the target posture, the irradiation site 47 The position of the irradiation site 49 shifts with respect to the position of.

The wavelength of the laser light emitted by the third light emitting unit 41 (for example, red) and the wavelength of the laser light emitted by the fourth light emitting unit 43 (for example, green) are different from each other.

The posture of the impact position detection unit 11 with respect to the plane 15 of the inspection target 5 around the axis C1 orthogonal to the first plane 35 and around the axis C3 orthogonal to the second plane 45 ( By adjusting the rotation angle), the planar region 17 scanned by the two-dimensional laser range finder 11 can be made parallel to the planar 15 of the inspection target 5.

In addition to the first light emitting unit 31, the second light emitting unit 33, the third light emitting unit 41, and the fourth light emitting unit 43, the first light emitting unit 31 (third light emitting unit 41) and the second light emitting unit 31 One or a plurality of sets of light emitting units composed of two light emitting units similar to the light emitting unit 33 (fourth light emitting unit 43) may be integrally provided in the striking position detecting unit 11.

For example, as shown in FIG. 2, a fifth light emitting portion and a sixth light emitting portion are provided so that the optical axis exists in the second plane 45, and the irradiation portion 51 is provided on the plane 15 of the inspection target 5. 53 may be generated.

Further, if the wall surface 15 of the inspection target 5 is a flat surface with poor accuracy such as a slight curve, the irradiation site 37 (47, 51) and the irradiation site 39 (49, 53) do not overlap each other. In this case, the posture of the striking position detecting unit 11 is adjusted so that the irradiation site 37 (47, 51) and the irradiation site 39 (49, 53) are close to each other.

The posture display unit 29 described above is configured to include a light emitting unit integrally provided with the impact position detection unit 11, and the light emitting unit has a predetermined shape on a flat surface or a flat surface of the inspection target 5. This is an example of a posture display unit configured to emit light forming an irradiation site of the above 5 toward a flat surface or a flat surface of the inspection target 5.

As another configuration example of the posture display unit 29, one set of light emitting units (first light emitting unit 31 and second light emitting unit 33) is used as the central axis Ca or the central axis of the impact position detecting unit 11. There is a configuration in which the light emitting portion is rotatable around an axis parallel to Ca and near the central axis Ca. In this case, the horizontal and vertical postures can be displayed separately by manually rotating the light emitting unit or the like.

Further, in the above description, the point-shaped irradiation sites 37, 39, 51, and 53 have been described as examples, but the change in the shape of the irradiation site formed on the flat surface or the flat surface 15 of the inspection target 5 is observed. As a result, the operator 3 may be configured to know the posture of the striking position detecting unit 11 with respect to the inspection target 5.

Further, as another method of adjusting the posture of the striking position detecting unit 11 (striking inspection unit), a method of using the two-dimensional laser range finder 11 without using the laser beam for adjustment as described above can be obtained. In this case, while changing the orientation of the inspection unit, the angle adjustment value (adjustment value) of the orientation of the inspection unit when the laser beam of the LRF (two-dimensional laser range finder 11) hits the wall surface 15 is checked, and the horizontal direction is obtained. Regarding the adjustment value of, the adjustment value when the LRF laser beam hits the left wall surface 15 is recorded, and then the adjustment value when the LRF laser beam hits the right wall surface to the same extent is recorded. Then, by setting it between these two adjustment values, the optimum adjustment in the horizontal direction is possible. With respect to the vertical direction, the adjustment value when the LRF laser beam hits the wall surface 15 can be examined, and the adjustment value can be optimized by referring to the adjustment in the horizontal direction from the adjustment value.

Next, the configuration of the tapping sound inspection device 1 and the like will be described with reference to the block diagram of FIG.

The CPU (processor) 21 of the tapping sound inspection device 1 includes a time management unit 55, a tapping sound extraction unit 57, and an inspection instrument position detection unit 59, and the memory 23 includes a temporary storage device 61, an SSD, and the like. It is configured to include a long-term storage device 63 composed of. The long-term storage device 63 stores the inspection target shape data 69 and the inspection record data 71.

Further, the control unit 25 is provided with a voice input board 65 and a network board 67. In FIG. 4, the laser range finder 11 is connected to the network board 67, but as shown in FIG. 5, the laser range finder 11 is connected to an interface board (for example, USB) 68 other than the network board 67. May be good. In this case, a separate wireless LAN board (network board) 67 is provided in parallel with the interface board 68. Then, wireless communication is performed with the mobile information terminal 81 and the network server 83.

The tapping sound extraction unit 57 obtains time information from the time management unit 55 and periodically (every 1 second, 1 minute, etc.) sends the time information from the tapping sound detection unit (contact type vibration sensor) 9 via the voice input board 65. Digitize the incoming signal. The digitization of the signal is continuously processed together with the time information. Then, the time information is associated with the digitized data and stored in the long-term storage device 63 as the inspection record data 71.

Although the output of the voice input board 65 is input to the processor 21 in FIGS. 4 and 5, the output of the voice input board 65 may be input to the network board 67 as another configuration. Further, the communication on the network board 67 may be made wireless. In FIG. 5, the output of the voice input board 65 may be input to the interface board 68.

The inspection instrument position detection unit 59 refers to the inspection target shape data 69, and detects an object (temporarily blocked object) that crosses the measurement surface (plane-like detection area) 17 by the impact position detection unit 11, and this detection is performed. Whether or not the inspection instrument (for example, a hammer) 7 is used is determined from the size of the crossed object, and the pair data of the time and the striking position is stored in the long-term storage device 63 as the inspection record data 71.

More specifically, for example, the voice data generated by the signal sent from the tapping sound detection unit (contact type vibration sensor) 9 at a certain time t1 and the measurement by the inspection instrument position detection unit 59 at a certain time t1. The hit position data by the hammer 7 is stored in the long-term storage device 63 as inspection record data 71, and the audio data and the hit position data are associated with each other via the information at time t1 to record the inspection. It is stored in the long-term storage device 63 as data 71.

Here, the inspection target shape data 69 will be described with reference to FIG.

The protrusion 73 protrudes from the measurement target surface (inspection target surface; a flat surface or a part of the flat surface 15 of the inspection target 5) 15A, and the protrusion 73 covers a part of the laser measurement surface (measurement target surface) 17A. It shall be blocked. In this case, as the measurement target area information, in order to prevent confusion between the protrusion 73 and the hammer 7, the protrusion 73 is recorded in advance and excluded from the measurement target area (measurement target surface) 15A. As a result, the surface 17B shown in FIG. 9B, which excludes the protrusion 73 from the measurement target surface 15A, becomes the surface shown in the inspection target shape data 69.

The impact of the inspection target 5 by the hammer 7 is made by passing the hammer 7 through the surface 17B shown by the inspection target shape data 69. The hammer 7 moves in a direction substantially orthogonal to the surface 17B and hits the inspection target 5.

Since the impact of the inspection target 5 by the hammer 7 is performed once to several times per second, for example, by changing the impact position 13, the waveform of one vibration detected by the contact type vibration sensor 9 and the impact position. A plurality of one inspection record data 71, which is configured such that one position of the hammer 7 detected by the detection unit 11 and the time are associated with each other, is stored in the long-term storage device 63.

Further, as shown in FIG. 4, the tapping sound inspection device 1 includes a screen display device 75 composed of an LCD or the like and an input device 77 such as a touch panel provided on the LCD. A device 79 (touch panel display, etc.) is installed.

Then, when the inspection target 5 is hit with the hammer 7 and inspected, the history of the hit position by the hammer 7 is displayed on the screen display device 75 of the user interface device 79. As a result, one or a plurality of workers 3 can see the history of the hitting position in real time, and can perform the inspection so that there is no leftover hit.

Further, when the user interface device 79 displays the history of the striking position, the entire or part of the inspection history can be freely browsed by performing operations such as enlargement / reduction / scrolling via an input device 77 such as a touch panel. be able to.

Further, a comment can be added to the history of the striking position using the software keyboard via the input device 77. The input comment is recorded in the long-term storage device 63 in association with the striking position and the vibration waveform.

Next, a case where the inspection target 5 is inspected by using the tapping sound inspection device 1 or the like will be described with reference to FIG.

First, the user (worker) 3 turns on the power of the tapping sound inspection device 1 (S1). When the power is turned on, the tapping sound inspection device 1 is initialized (S3).

When the initialization is completed, the tapping sound inspection device 1 measures the shape of the inspection target (measurement target) 5 as described with reference to FIG. 9 (S5), and stores the measured shape of the measurement surface in the long-term storage device 63. Record in (S7).

Further, when the tapping sound inspection device 1 is initialized, the display of the measurement status on the screen display device 75 starts (S9), and the worker 3 changes the posture of the tapping sound inspection device 1 with respect to the inspection target 5. Adjust (S11). When the posture adjustment work is completed, the worker 3 inputs the recording start (S13).

The operations of steps S5 and S7 are performed at short time intervals until the recording start input in step S13 is input, and immediately before the recording start input in step S13 is input to the long-term storage device 63. , The shape of the measurement surface is recorded.

Subsequently, the tapping sound inspection device 1 starts recording the inspection (S15), so that the worker 3 performs the striking operation (S17). That is, the worker 3 hits the surface 15 of the inspection target 5 with a hammer 7 at a different place. The tapping sound inspection device 1 records the striking location and the vibration at that time in the long-term storage device 63 in association with each other.

Subsequently, when the operator 3 inputs that the input is completed (S19), the tapping sound inspection device 1 ends the inspection record (S21).

Subsequently, when the worker 3 turns off the power of the tapping sound inspection device 1 (S23), the display of the measurement status on the screen display device 75 ends (S25).

According to the tapping sound inspection device 1, the tapping sound detection unit 9 installed at a predetermined position in a predetermined posture with respect to the inspection target 5 contacts the inspection target 5 to detect the striking sound, and the inspection target 5 is inspected. On the other hand, the striking position detecting unit 11 installed at a predetermined position in a predetermined posture detects the striking position and records the detection result in the long-term storage device 63, so that the operator 3 is not burdened and is accurate. It is possible to record the hitting sound and the hitting position.

That is, as a result of the manual tapping sound inspection, it becomes possible to automatically and accurately and electronically collect the striking position information and the vibration information of concrete or the like in which the time is synchronized.

In addition, unlike the recording device described in Patent Document 1, noise such as environmental sound and reverberant sound is no longer picked up, vibration information other than the tapping sound to be analyzed can be eliminated, and accurate striking sound and accurate striking sound can be obtained. The striking position can be recorded without causing the worker 3 to take time and effort.
Further, since the tapping sound inspection device 1 does not move with respect to the inspection target 5 when the hammer 7 hits the inspection target 5, the configuration of the device is simplified, the weight is reduced, and many are used. It will be easier to carry to a certain inspection site and the price will be reduced.

Further, according to the tapping sound inspection device 1, the striking position detecting unit 11 detects the head portion 7A of the hammer 7 that has passed through the planar detection region 17 for striking, thereby striking the inspection target 5. Since the planar detection region 17 is configured to detect the vertical position, it is parallel to the plane 15 of the inspection target 5 to be hit and is slightly separated from the plane 15 of the inspection target 5 to be hit. The inspection target 5 is viewed from the impact position detection unit 11 without the worker 3 entering the detection area 17 of the impact position detection unit 11 and moving the tapping sound inspection device 1 following the operator 3. The striking position of is no longer hidden by the worker 3.

Further, according to the tapping sound inspection device 1, since the installation support unit 27 finely adjusts the posture of the impact position detection unit 11 with respect to the inspection target 5, it is easy to set the planar detection area 17 of the impact position detection unit 11. Become. That is, it becomes easy to set the detection region 17 to be parallel to the plane 15 of the inspection target 5 and slightly away from the plane 15 of the inspection target 5.

Further, according to the tapping sound inspection device 1, the posture display unit 29 indicating that the striking position detection unit 11 using the installation support unit 27 is installed in a predetermined posture with respect to the inspection target 5 is provided. Therefore, the worker 3 can easily confirm the posture of the striking position detecting unit 11 with respect to the inspection target 5.

Further, according to the tapping sound inspection device 1, the first light emitting unit 31 (third light emitting unit 41) and the second light emitting unit 33 (fourth light emitting unit 43) are provided and inspected. The intersection angle θ1 (θ3) between the plane 15 of the object 5 and the optical axis L1 (L3) of the laser beam emitted by the first light emitting unit 31 (third light emitting unit 41) is the plane 15 of the inspection target 5 and the second. It is different from the intersection angle θ2 (θ4) with the optical axis L2 (L4) of the laser beam emitted by the light emitting unit 33 (fourth light emitting unit 43).

Then, by changing the posture of the striking position detecting unit 11 with respect to the plane 15 of the inspection target 5, the irradiation portion formed on the plane 15 of the inspection target 5 by the light emission of the first light emitting unit 31 (third light emitting unit 41). When the position of 37 (47) and the position of the irradiation portion 39 (49) formed on the plane 15 of the inspection target 5 by the light emission of the second light emitting unit 33 (fourth light emitting unit 43) coincide with each other. In addition, since the striking position detecting unit 11 is installed in the correct posture with respect to the inspection target 5, it becomes easy for the operator 3 to install the tapping sound inspection device 1 in the correct posture.

By the way, as shown in FIGS. 6 and 7, instead of the screen display device 75, the information is displayed on the screen of the information terminal device 81 by communicating with an external information terminal device (assuming a PC or a smartphone) 81. You may do so. In FIG. 6, the output of the voice input board 65 is input to the processor 21, but as another configuration, the output of the voice input board 65 may be input to the network board 67. Further, the communication on the network board 67 may be made wireless.

Further, as shown in FIG. 7, by wirelessly communicating with the network server (cloud service or the like) 83, the records such as the inspection target shape data 69 and the inspection record data 71 are recorded on the network server 83 via the Internet. May be good.

1 Tapping sound inspection device 5 Inspection target 7 Inspection instrument (hammer)
9 Hitting sound detector (contact type vibration sensor)
11 Strike position detector (2D laser range finder)
17 Detection area 15 Plane to be inspected 27 Installation support unit 29 Attitude display unit 31 First light emitting unit 33 Second light emitting unit L1 optical axis (optical axis of laser light emitted by the first light emitting unit)
L2 optical axis (optical axis of laser light emitted by the second light emitting part)
θ1 intersection angle (intersection angle between the plane 15 to be inspected and the optical axis L1 of the laser beam θ2 intersection angle (intersection angle between the plane 15 to be inspected and the optical axis L2 of the laser beam)

Claims (5)

It is a tapping sound inspection device that records the tapping sound and the striking position when the inspection target is hit with an inspection instrument.
A tapping sound detection unit that contacts the inspection target and detects the tapping sound generated by the impact,
An impact position detection unit that is installed at a predetermined position in a predetermined posture with respect to the inspection target and detects the position of the impacted portion.
Have a, the hitting position detecting unit, by detecting the test instrument blocking through a temporary for said striking a planar detection region, to detect the position of striking the test object is made The planar detection region is parallel to the plane of the inspection target to be impacted or substantially parallel to the planar surface of the inspection target to be impacted. Slightly away from a flat or flat surface
Having a storage device that stores the tapping sound detected at a predetermined time by the tapping sound detection unit and the position of the impacted portion detected at the predetermined time by the striking position detecting unit in association with each other. A characteristic tapping sound inspection device. The tapping sound inspection device according to claim 1.
The tapping sound detection unit is installed at a predetermined position in a non-moving state with respect to the inspection target at a distance from the inspection target portion struck by the inspection instrument.
The striking position detecting unit is installed in a non-moving state at a predetermined position in the vicinity of the striking sound detecting unit together with the striking sound detecting unit at a position away from the inspection target portion struck by the inspection instrument. tapping sound inspection apparatus characterized by being turned. The tapping sound inspection device according to claim 1 or 2.
A tapping sound inspection device comprising an installation support unit that finely adjusts the posture of the striking position detecting unit with respect to the inspection target and installs the striking position detecting unit in a predetermined posture with respect to the inspection target. The tapping sound inspection device according to any one of claims 1 to 3.
A tapping sound inspection device comprising a posture display unit indicating whether or not the planar detection region and the planar surface to be inspected are substantially parallel to each other. The tapping sound inspection device according to claim 4.
The posture display unit is provided in the striking position detecting unit, and is provided in a first light emitting unit that emits laser light or beam light toward a flat surface or a flat surface to be inspected, and the striking position detecting unit. It is configured to include a second light emitting unit that emits laser light or beam light toward the flat surface or the flat surface to be inspected.
The intersection angle between the flat or planar surface of the inspection target and the optical axis of the laser light or beam light emitted by the first light emitting unit is the plane or flat surface of the inspection target and the second light emitting unit. A tapping sound inspection device characterized in that it differs from the intersection angle of the laser light or beam light emitted by the light with the optical axis.

Images