JP3079322B2 - 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 method for inspecting and confirming the surface of a structure such as a wall surface existing in a liquid, particularly in 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. And when observing the shape and condition of the wall such as this excavation groove,
The liquid is opaque and difficult to observe. Therefore,
Conventionally, there is a method of inspecting and confirming a wall surface in an opaque liquid by using an ultrasonic groove wall measuring device, or a method in which a diver dive and groping.

[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]

[Object of the present invention] The present invention relates to an opaque liquid such as muddy water.
It is an object of the present invention to provide an apparatus and a method capable of inspecting and confirming the surface of an object such as a wall surface in a fluid.

[0005]

In an inspection apparatus for inspecting an inspection surface in a liquid in a groove, a waterproof photographing means and the photographing means are arranged inside, so that a transparent fluid can be filled therein. An inspection in which a transparent sheet expandable to the size of the cross-sectional area of the groove is provided, and the transparent sheet is brought into close contact with the inspection surface of the groove, and the contact portion of the inspection surface is photographed by photographing means. Surface inspection device and inspection method.

[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 an opaque liquid such as muddy water between the transparent sheet and the wall to be inspected is eliminated. In this state, by photographing the video camera or the like 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 arranged in the muddy water 4 and inspects and observes the wall surface of the excavation groove 2. The inspection device 1 is used not only in the muddy water 4 but also in a transparent and opaque fluid. An example of a wall surface to be observed by the inspection device 1 is a wall surface in a digging trench 2 excavated in a ground 3. After the excavation groove 2 is filled with the stable liquid or the muddy water 4, an inspection is performed for the presence or absence of irregularities or cracks on the inspection surface of the wall. Not only the side wall surface but also the bottom wall surface and the upper wall surface can be inspected. Inspection device 1 is muddy water 4
It is placed so that it can move up and down. This movement may operate independently, or may operate in conjunction with the inspection device 1.

<B> Video Camera The video camera 10 is hermetically housed in a storage casing 11 made of steel or the like and a transparent protective dome 12 made of synthetic resin or the like. The storage casing 11 is rotatably supported by a horizontal rotation device 13 and a vertical rotation device 14. Thereby, the video camera can be directed in a predetermined direction to photograph the wall surface. Storage casing 11
The transparent protective dome 12 has a waterproof structure and a pressure-resistant structure to withstand water pressure. A controller, a video deck, and a monitor television are connected to a control / communication cable 20 for transmitting signals of the video camera 10 and operating a video camera, a lighting device, and the like. An illumination light (not shown) for illuminating the photographing wall surface may be mounted inside or outside the storage casing.

<C> Transparent sheet for wall inspection The airtight inspection sheet casing 15 made of steel or the like slightly smaller than the cross section of the digging groove 2 and the wall inspection transparent sheet 16 made of polyethylene vinyl, etc. The empty container is airtight and shuts off the muddy water 4. In the container, a device such as a video camera 10 and Shimizu 1
7 are stored. The fresh water 17 is not limited to water, but is a transparent liquid such as alcohol, a gas such as transparent air,
Also, a deformable fluid substance may be used. These choices are determined in consideration of buoyancy, refractive index, and the like. Shimizu 17
The water is supplied by a fresh water pressurizing pump 19 via a fresh water hose 18.

<D> Moving Mechanism of Inspection Apparatus The inspection apparatus 1 can be moved by moving a wire cable or the like attached to the upper part of the apparatus up and down by a crane winch on the ground. Alternatively, a moving device, for example, a screw / water injection device or the like may be attached to the inspection device 1 itself. During the movement, the wall surface inspection transparent sheet 16 is filled with fresh water 17 to such a size that it does not touch the wall surface around the excavation groove 2. FIG. 2 is a plan view of FIG. The transparent sheet for wall inspection is filled with fresh water 17 and expanded, and is formed to have a size slightly smaller than the cross-sectional area of the excavation groove 2. In this state, the inspection device 1 can move in the vertical direction.

The operation of the inspection device will be described. <A> Outline of Operation The transparent sheet 16 is deformed into a pattern corresponding to the surface shape of the wall surface by pressing the transparent sheet 16 for wall surface inspection against the wall surface to be inspected (the wall surface of the ground 3). As a result, the muddy water 4 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. When viewing another wall surface, the inspection apparatus 1 is moved by operating the inspection apparatus elevating cable, and the video camera 10 is focused on a desired wall surface by the controller to photograph the wall surface.

<B> Inspection FIG. 3 shows a state in which fresh water is supplied to the wall surface inspection transparent sheet 16 by the fresh water pressurizing pump 19 during the inspection in which the inspection apparatus 1 is moved to the wall surface to be inspected. . The transparent sheet 16 swells and adheres to the wall surface to be inspected by the pressure of the fresh water 17, and the muddy water 4 is eliminated. Since the transparent sheet 16 adheres according to the shape of the wall surface, the video camera 10 can clearly show the wall surface. At this time, a lighting lamp is turned on to illuminate the wall. FIG. 4 is a plan view of FIG. The transparent sheet for wall inspection expands to the side and is completely adhered to the side wall. Since there is no muddy water on the sides, the field of view of the camera 10 is not obstructed by the muddy water. When the wall surface inspection is to be continued, the position of the transparent sheet 16 is kept as it is, and the video camera 10 is moved to predetermined upper, lower, left, and right positions to perform the inspection continuously. In addition, when the location to be inspected is far away, the clear water is removed to the outside, the shape of the transparent sheet 16 for wall inspection is changed to the state shown in FIG. 1, and the inspection apparatus is moved to predetermined upper and lower positions. The sheet is expanded again by applying pressure, and the sheet is brought into close contact with the inspection surface to perform the inspection.

<C> Inspection by Rotation of Video Camera FIG. 5 is a diagram in which the video camera 10 is rotated in the vertical rotation direction 21 (around the horizontal axis) by the vertical rotation device 14 to observe the wall surface. The position of the inspection device 1 is below FIG. 3, and the transparent sheet for wall surface inspection is in close contact with the bottom surface. Therefore, the video camera 10 can observe the side wall and the bottom surface at a time. FIG. 6 is a plan view of FIG. However, the video camera 10 is rotated by the horizontal rotation device 13 in the horizontal rotation direction 22.
(Around the vertical axis). Therefore, four sides can be observed at once.

<D> Rotation Mechanism of Video Camera FIG. 7 shows an example of a rotation mechanism of the video camera. As a driving mechanism for rotating the video camera 10, a rotating shaft 26 having a video camera housing casing 11 at the end through a first gear 24 through a first gear 24.
To the second gear 25 to rotate the video camera 10. The rotation drive unit is housed in a hermetically sealed casing by a rotation drive unit casing 27 and a seal bearing member 28. However, when using a submersible motor, the casing need not be airtight.

[0015]

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> Even without putting a diver in the opaque liquid, reliable inspection and confirmation can be performed,
Workability can be greatly improved. <C> By mounting a transparent sheet for wall inspection covering the entire inspection wall, it is possible to inspect and confirm not only the side wall surface but also the bottom surface at the same time. <D> Inspection / confirmation of any cross-sectional shape by manufacturing the shape of the inspection sheet casing and the transparent sheet for wall surface inspection according to the inspection cross-section even if the cross-section of the groove is circular or other complex planar shapes. It can be performed. <E> The system is simple in that fresh water is placed in a transparent sheet for wall inspection to balance the pressure with the external opaque liquid, so that only the storage casing of the video camera and the transparent protective dome have a pressure-resistant structure. Structures are possible.

[Brief description of the drawings]

FIG. 1 is a side view when an inspection apparatus according to the present invention is moved.

FIG. 2 is a plan view when the inspection apparatus according to the present invention is moved.

FIG. 3 is a side view at the time of inspection of the inspection device according to the present invention.

FIG. 4 is a plan view of the inspection device according to the present invention at the time of inspection.

FIG. 5 is a side view of the inspection device according to the present invention at the time of vertical inspection.

FIG. 6 is a plan view of the inspection device according to the present invention at the time of horizontal inspection.

FIG. 7 is a sectional view of the horizontal / vertical rotation device according to the present invention.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-196427 (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 in a groove, wherein the imaging means is provided with waterproofing, and the imaging means is disposed therein, and can be filled with a transparent fluid to cut the groove. Inspection characterized by having a flexible transparent sheet inflatable to the size of the area, bringing the transparent sheet into close contact with the inspection surface of the groove, and photographing the contact portion of the inspection surface with an imaging means. Surface inspection equipment. 2. An inspection method for inspecting an inspection surface in a liquid in a groove, wherein a transparent fluid is filled in a flexible transparent sheet and expanded to the size of a cross-sectional area of the groove. A method for inspecting an inspection surface, comprising: fixing a flexible transparent sheet in the groove; and photographing a contact portion of the inspection surface with waterproof photographing means installed in the transparent sheet. 3. An inspection apparatus for inspecting an inspection surface in a liquid in a groove, wherein a waterproof imaging means rotatable in an arbitrary direction, and the imaging means are disposed inside, and a transparent fluid is filled therein. A flexible transparent sheet capable of being inflated to the size of the cross-sectional area of the groove, the transparent sheet being brought into close contact with the inspection surface of the groove, and the contact portion of the inspection surface being photographed by the photographing means An inspection apparatus for inspecting an inspection surface.