JP3079321B2 - Inspection apparatus and method for inspection surface in liquid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for inspecting and confirming the surface of a structure such as a wall surface existing in a liquid, particularly an opaque liquid such as muddy water.

[0002]

2. Description of the Related Art Stabilizing liquid or muddy water is sometimes used to protect walls such as excavation grooves formed in the ground. When observing the shape and state of the wall surface, the observation is difficult because the liquid is usually opaque. Therefore, conventionally, to inspect and confirm the wall surface in the opaque liquid, there is a method of using an ultrasonic groove wall measuring device, or a method in which a diver dives and gropings to investigate.

[0003]

Problems to be solved by the present invention have the following problems. <A> When using an ultrasonic groove wall measuring instrument, accurate inspection is difficult for an object having a circular or complex shape due to irregular reflection of the measured ultrasonic wave, and because measurement is difficult at a corner portion. <C> When a diver goes underground and gropings to investigate, there are problems with safety, workability, etc., such as in narrow inspection places and dangerous places.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus and a method for inspecting and confirming the surface of an object such as a wall surface in an opaque fluid such as muddy water.

[0005]

SUMMARY OF THE INVENTION The present invention relates to an inspection apparatus for inspecting an inspection surface in a liquid. The inspection device is provided with a waterproof imaging device and a transparent imaging device disposed on the inspection surface side of the imaging device. A transparent sheet capable of being filled with a fluid, wherein the transparent sheet is brought into close contact with the inspection surface, the contact portion is photographed with a camera, and the inspection surface is inspected, or the transparent sheet is expanded and inspected. An inspection apparatus and a method for fixing an inspection apparatus to a wall surface by bringing the inspection apparatus into close contact with a wall surface on both sides of the surface.

[0006]

As an example, a flexible transparent sheet filled with a transparent fluid such as fresh water is brought into close contact with a wall or the like, and a liquid between the transparent sheet and the wall to be inspected, particularly an opaque liquid such as muddy water, is eliminated. In this state, by photographing the photographing means from the transparent sheet side to the wall surface side, muddy water does not block the optical path of the photographing, so that the wall surface can be clearly photographed.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. An inspection system according to an embodiment will be described. <A> Inspection device In FIG. 1, the inspection device 1 is placed in muddy water e, and an inspection surface such as a wall of an excavation groove is inspected and observed. The inspection apparatus 1 can be used not only in muddy water but also in a transparent and opaque liquid. Examples of the inspection surface to be observed by the inspection device include a protrusion d on the partition plate c of the concrete f or a wall surface of the ground a. The inspection device 1 is a cable 13 for raising and lowering the inspection device.
It is placed so that it can move in muddy water. The lifting cable 13 can move the inspection device 1 in the vertical direction, and may operate independently, or may operate in conjunction with the inspection device 1.

<B> Video Camera In the inspection apparatus 1, a video camera 2 is housed in a pressure-resistant case 3. The pressure-resistant case 3 has a waterproof structure to prevent water from entering the video camera 2 and has a pressure-resistant structure to withstand water pressure. A data / operation signal cable 16 for transmitting a signal of the video camera 2 and operating a video camera, a lighting device, and the like is connected to a controller 19.
And a VCR 17 and a monitor TV 18.

<C> The transparent sheet for wall surface inspection The pressure-resistant case 3 is housed in a housing casing 4.
The inspection transparent sheet 5 is attached to one surface of the storage casing 4. A space surrounded by the storage casing 4 and the inspection transparent sheet 5 is filled with fresh water 6. The fresh water 6 is not limited to water, but may be a transparent fluid such as alcohol or a transparent deformable fluid. Alternatively, under certain conditions, a transparent gas may be used. These choices are determined in consideration of buoyancy, refractive index, and the like. The storage casing 4
The relationship between the inspection transparent sheet 5 and the inspection transparent sheet 5 can also be appropriately modified, and the entire surface can be formed of the inspection transparent sheet 5. Further, if necessary, a lighting device (not shown) may be provided in the pressure-resistant case 3 or the storage casing 4. To supply fresh water, a hose 7 for supplying fresh water is attached to the storage casing 4 and connected to a fresh water supply pump 8.

The operation of the inspection device will be described. <A> Outline of Operation The transparent sheet 13 for inspection is pressed against the wall surface to be inspected (the wall surface of the projection 5 or the ground 6), so that the transparent sheet 13 is deformed into a pattern corresponding to the surface shape of the wall surface.
As a result, the muddy water 2 between the wall surface and the transparent sheet is eliminated, and the muddy water does not obstruct the view of the video camera. Therefore, the state of the wall surface can be clearly seen on the monitor television 18. When viewing another wall surface, the inspection apparatus 1 is moved by operating the inspection apparatus elevating cable, and the controller 1 is moved.
9 focuses the video camera 10 on the desired wall surface and photographs the wall surface.

<B> During Movement FIG. 2 shows a state in which the inspection apparatus 1 is moved to the inspection surface. In this state, since the muddy water e exists between the inspection surface and the inspection transparent sheet 5, the visibility of the video camera 2 is poor and the inspection surface cannot be clearly seen. FIG. 3 is a plan view of the state of FIG. 2 as viewed from above. The storage casing 4 is slightly smaller than the width of the excavation groove, and can be moved up and down.
Muddy water exists between the inspection surface and the inspection transparent sheet 5.

<C> At the time of inspection FIG. 4 shows that at the time of inspection in which the video camera 2 is moved to a predetermined inspection surface, fresh water is supplied to the storage casing 4 by the fresh water supply pump
Indicates the state of supply. The transparent sheet 5 swells and adheres to the wall surface to be inspected by the pressure of the fresh water, so that muddy water is eliminated. Since the transparent sheet 5 is in close contact with the projection d, the video camera 2 can clearly project the projection d. FIG. 5 is a side view of FIG. Since the fresh water is supplied to the storage casing 4 via the fresh water supply hose 7, the inspection transparent sheet 5 comes into close contact with the inspection surface and eliminates the muddy water e. FIG. 6 is a plan view of FIG. The inspection transparent sheet 5 expands due to the water pressure of the fresh water 6 and comes into close contact with both side surfaces of the excavation groove. As a result, the inspection device 1 is fixed to the wall surface of the excavation groove.

<D> Rotation and Movement of Video Camera Since the inspection transparent sheet 5 is in close contact with the inspection surface, the video camera 2 can be rotated to observe a horizontal region of the inspection surface at a time. Since the inspection transparent sheet 5 covers the entire width of the wall surface and eliminates the muddy water e, there is nothing obstructing the view of the video camera 2. Therefore, the state of the inspection surface can be inspected simply by rotating the video camera 2 sideways. The rotating means of the video camera can be appropriately considered. For example, it is also possible to fix the pressure-resistant case 3 to the storage casing 4 so as to be rotatable and to perform the remote control from the outside by a motor or the like. In FIG. 7, instead of rotating the video camera 2 in FIG. 6, a horizontal row of the inspection surface can be inspected at a time by moving in parallel. Since the storage casing 4 is large, the field of view is wide, and only the video camera 2 needs to be moved. Means for parallel movement can be considered as appropriate.
A rail may be provided on the side surface of the case, and the pressure-resistant case 3 may be moved on the rail. Or it is also possible to move with a screw and a water injection device. In addition, the main body of the inspection apparatus 1 can be moved even if it is connected to a relay winch or the like on the ground via the cable 13 for raising and lowering. The inspection target is not limited to the side wall, but can be applied to the bottom wall and the top wall.

[0014]

Since the present invention has been described above, the following special effects can be obtained. <A> Since the opaque liquid can be removed by the transparent sheet, the wall surface and the projections can be directly observed with a video camera, and the material of the wall surface and the shape of the projections can be inspected and confirmed in detail. <B> It is possible to inspect and confirm in detail even those with a circular or complex shape that cannot be inspected due to irregular reflection with an ultrasonic measuring instrument. <C> Since the inspection device of the present invention can be operated even in a place where a diver cannot enter, safety and workability can be improved. <D> The apparatus is fixed by expanding the inspection transparent sheet and pressing the wall surfaces on both sides of the excavation groove, so that no special fixing device is required. <E> By attaching a flexible inspection transparent sheet that has enough room to cover the entire projection to be inspected, it is possible to inspect projections of any size regardless of the size of the projection. You can check.

[Brief description of the drawings]

FIG. 1 is an overall view of an inspection system.

FIG. 2 is a side view when the inspection apparatus is moved.

FIG. 3 is a plan view when the inspection apparatus is moved.

FIG. 4 is a detailed view of a protrusion at the time of inspection by the inspection device.

FIG. 5 is a side view of the inspection device at the time of inspection.

FIG. 6 is a plan view at the time of inspection by rotation of a video camera.

FIG. 7 is a plan view at the time of inspection by lateral movement of the video camera.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-196428 (JP, A) JP-A-5-196429 (JP, A) JP-A-5-196430 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) G01B 11/00-11/30 E02D 5/18

Claims (3)

(57) [Claims] 1. An inspection apparatus for inspecting an inspection surface in a liquid, comprising: a waterproof imaging unit; and a transparent sheet disposed on the inspection surface side of the imaging unit and capable of being filled with a transparent fluid. An inspection device for inspecting an inspection surface, wherein the inspection unit inspects the inspection surface by bringing the transparent sheet into close contact with the inspection surface, photographing the adhered portion with the photographing means. 2. An inspection method for inspecting an inspection surface in a liquid, the method comprising: bringing a transparent sheet filled with a transparent fluid therein into close contact with the inspection surface; Photographing with a waterproof photographing means through the method. 3. An inspection method for inspecting an inspection surface in a liquid, the method comprising: filling a transparent fluid in the inside to expand a transparent sheet;
A step of bringing the transparent sheet into close contact with the wall of the inspection surface and fixing the transparent sheet to the inspection surface; and An inspection method for an inspection surface, comprising: