JP3079391B2 - Inspection apparatus and inspection method for wall 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 inspection apparatus and an inspection method for inspecting the surface of a structure such as a wall surface located in a liquid, particularly an opaque liquid such as a stabilizing liquid or muddy water.

[0002]

2. Description of the Related Art Conventionally, wall surfaces and partition plate surfaces in an opaque liquid such as a stabilizing liquid or muddy water have been inspected by an ultrasonic groove wall measuring instrument or a diver.

[0003]

Problems to be solved by the present invention have the following problems. <A> In the case of an ultrasonic groove wall measuring instrument, accurate measurement is difficult when a thin mud film is formed on the inspection surface. In addition, it is difficult to measure the corners and it is difficult to measure accurately. <B> When divers go underground to search by groping, there are problems in safety, workability, etc. 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 reliably inspecting an object surface such as a wall surface in a liquid, particularly an opaque liquid or a fluid such as muddy water. .

[0005]

[Means for Solving the Problems] In an inspection apparatus for an inspection surface located in a liquid, a waterproof and movable imaging means, and a transparent fluid is disposed between the imaging means and the inspection surface, and the inside is filled with a transparent fluid. A flexible transparent sheet and a sheet opening provided in the transparent sheet are provided, and the inspection of the inspection surface is performed by ejecting a transparent fluid from the sheet opening to the inspection surface side. An inspection device for a submerged inspection surface, and the inspection device.

[0006]

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 13, and an inspection surface such as a wall of a digging trench excavated in the ground 12 is inspected and observed. The inspection apparatus 1 can be used not only in muddy water but also in a transparent and opaque liquid. As an example of the inspection surface to be observed by the inspection device, there are wall surfaces having irregularities such as the gravel layer 14 and the gravel layer 15. The inspection device 1 is installed so as to be movable in the muddy water 13 by the inspection device lifting device 11. The inspection device elevating device 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> Television Camera In the inspection device 1, a television camera 2 is housed in a pressure-resistant case 3. The pressure-resistant case 3 has a waterproof structure so that water does not enter the TV camera 2, and also has a pressure-resistant structure to withstand water pressure. A signal cable 9 for transmitting a television camera signal or operating a television camera / lighting device or the like is connected to a VCR, a monitor television, and a controller 10.

<C> Inspection transparent sheet The pressure-resistant case 3 is housed in a housing casing 4,
Inspection transparent sheets 5 are attached to both sides of the storage casing 4. A space surrounded by the storage casing 4 and the inspection transparent sheet 5 is filled with fresh water 16.
The fresh water 16 is not limited to water, but may be a transparent fluid such as alcohol, or a transparent deformable fluid. The relationship between the storage casing 4 and the inspection transparent sheet 5 can be appropriately modified, and the entire surface can be formed of the inspection transparent sheet 5. A sheet opening 6 is formed in the inspection transparent sheet, and fresh water 16 is injected into the muddy water 13. In order to perform the injection only when necessary, a device for controlling the opening and closing of the sheet opening may be attached. A plurality of sheet openings may be provided as necessary. Further, an illumination device (not shown) may be arranged at an appropriate position to illuminate the inspection surface. For example, it can be provided in the pressure-resistant case 3 or the storage casing 4. To supply fresh water 16, a fresh water supply hose 7 is attached to the storage casing 4 and connected to a fresh water pressurizing pump 8.

The operation of the inspection device will be described. <A> Outline of operation Fill the inspection transparent sheet with fresh water, press the inspection transparent sheet 5 against the wall surface (gravel layer 15) to be inspected, and transform the transparent sheet 5 into a pattern corresponding to the surface shape of the wall surface. I do. As a result, the muddy water 13 between the wall surface and the transparent sheet is eliminated, and the muddy water does not obstruct the view of the television camera 2. However, inspection of the gravel layer 15 revealed that there was one mud
Because of the presence of 3, the view is blocked by the muddy water 13,
Insufficient inspection may be required. Therefore, by sending clear fresh water into the muddy water 13 from the sheet opening 6, the muddy water between the gravel is replaced with the fresh water so that the details of the gravel layer 15 can be clearly observed on the monitor television. When viewing another wall surface, the inspection device 1 is moved by operating the inspection device lifting / lowering device 11, and the controller 10 focuses the TV camera 10 on the desired wall surface and photographs the wall surface. At that time, the inspection transparent sheet is reduced so that it can be moved in the groove.

<B> Inspection FIG. 2 shows a state in which fresh water is being fed into the inspection sheet by the fresh water pressurizing pump 8 in a state where the inspection apparatus is moved to the inspection place by the lifting device. . This shows a state in which fresh water 16 is being supplied to the storage casing 4 by the fresh water supply pump 8 at the time of the inspection in which the television camera 2 is moved to a predetermined inspection surface. Fresh water is sprayed into muddy water from the seat opening. Further, the transparent sheet 5 swells and comes into close contact with the wall surface to be inspected by the pressure of the fresh water, so that muddy water 13 between the inspection surface and the transparent sheet for inspection is eliminated. FIG. 3 shows a state in which fresh water is further fed by a fresh water pressurizing pump. Fresh water enters the muddy water from the sheet opening, and since the specific gravity of the fresh water is lighter than the muddy water, it rises to the upper part while pushing out the muddy water between the gravels. In this state, Shimizu is sent continuously, and the space between gravel is filled with Shimizu. The inspection sheet is in close contact with the inspection section, and the muddy water between the gravel is replaced with clear water by a TV camera, and the signal is sent to the VCR / monitor TV on the ground via cable, and the image is transmitted. Inspection and observation are performed by projecting.

<D> Rotation and Movement of Television Camera In a state where the inspection transparent sheet 5 is in close contact with the inspection surface on the opposite side, the television camera 2 can be rotated to observe the opposite surface. . When the inspection transparent sheet 5 covers the entire width of the wall surface, the television camera can be moved in parallel to observe the entire side surface. In addition, it is clear that the inspection target is not limited to the side wall, but can be applied to the bottom surface and the top wall.

[0012]

Since the present invention has been described above, the following special effects can be obtained. <a> By providing an opening in the inspection sheet and discharging fresh water from it, even if there is some unevenness on the inspection surface, the muddy water in the recess can be replaced with fresh water, Inspection and observation of the replacement part can be performed. <B> Since the opening is simply formed in the inspection sheet without using a special fresh water injection device, the device can be simplified. <D> The muddy water wall, which could only be indirectly inspected with an ultrasonic groove wall measuring device, can now be inspected and observed directly with a TV image, and the fine wall condition and material can be known. It became possible.

[Brief description of the drawings]

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

FIG. 2 is a diagram illustrating a start of pressurizing fresh water in a sheet of the inspection apparatus.

FIG. 3 is a diagram at the time of completion of a muddy water removal / inspection.

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

Claims (2)

(57) [Claims] 1. An inspection apparatus for an inspection surface located in a liquid, comprising: a waterproof movable imaging means; and a flexible means disposed between the imaging means and the inspection surface and capable of being filled with a transparent fluid. A transparent sheet, and a sheet opening provided in the transparent sheet, and ejecting a transparent fluid from the sheet opening to the inspection surface side,
An inspection device for a submerged inspection surface, which inspects an inspection surface. 2. A method for inspecting an inspection surface located in a liquid, comprising: arranging a waterproof imaging unit on a predetermined inspection surface; and disposing a transparent fluid between the imaging unit and the inspection surface. Contacting the filled flexible transparent sheet with an inspection surface; ejecting a fluid from an opening of the transparent sheet; photographing the contacted inspection surface with the imaging unit and inspecting the image. A method for inspecting a submerged inspection surface, comprising: