JP3051334B2 - Borehole TV camera device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a borehole television camera device for inserting a camera into a borehole and observing the state of the hole wall.

[0002]

2. Description of the Related Art Conventionally, as a borehole television camera device, Japanese Patent Application Laid-Open No. Hei 1-210594 and Japanese Patent Application Laid-Open No.
The one disclosed in Japanese Patent Application Publication No. 11401 is known. This type of borehole television camera device is configured, for example, as shown in FIG. That is, the borehole television camera device 200 has a camera sonde 201 to be inserted into the borehole H, an elevator 204 for raising and lowering the camerasonde 201 within the borehole H, and a depth of the camerasonde 201 within the borehole H. An encoder 206 for measuring depth, a control unit 203 for controlling the camera sonde 201 and the elevator 204, and processing an image signal from the camera sonde 201, depth data from the encoder 206 for depth measurement, and the like; And a system cable 202 for connecting these devices and transmitting / receiving signals, supplying power, and the like.

A camera sonde 201 includes a television camera 211 stored in a cylindrical cylinder 210, a plane reflecting mirror 212 disposed at an angle of 45 degrees on the optical axis of the television camera 211, The apparatus includes a cylindrical glass window 213 attached to 210 and a light bulb 214 for irradiating the outside of the glass window 213. The camera sonde 201 is configured to be rotatable around an axis of the boring hole H by a driving source (not shown), and the direction in which the television camera 211 is shooting is detected by the compass 215.

[0004] With the above configuration, the camera sonde 2
01 is inserted into the boring hole H, and the depth in the boring hole H is detected by the depth measuring encoder 206, and is moved to a desired depth position by the elevator 204, and the direction at that position is detected by the compass 215. In addition, by irradiating the inside of the boring hole H with the light bulb 214 in a desired photographing direction by a driving source (not shown), the hole wall surface S at a desired position can be photographed. The image signal of the hole wall surface S is sent to the control unit 203, processed, and
5 is displayed. Therefore, the observer can grasp the geology and the like in the borehole H by monitoring the display image on the television monitor 205.

[0005]

However, the above-mentioned conventional borehole television camera apparatus has a structure in which a glass window is attached to a cylindrical body of a camera sonde, and a portion where the cylindrical body and the glass window are joined to each other. There is a problem that the water in the boring hole that invades cannot be completely removed. If water enters the camera sonde, it may cause a malfunction of the device.

In order to solve this problem, when the camera sonde and the glass window are formed integrally, the glass window is finely scratched due to friction with the bore wall of the boring hole due to the lapse of years of use. When the transparency of the glass window is deteriorated, there is a problem that an image captured by the television camera becomes unclear. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a borehole television camera device capable of always capturing a clear image without intrusion of moisture or the like.

[0007]

Means for Solving the Problems A borehole television camera device according to the present invention has a camera sonde configured to be insertable into a boring hole and to be able to move up and down in the boring hole, and the hole wall surface of the boring hole is provided. In the borehole television camera device that captures an image, the camera sonde is formed of a transparent material and has a cylindrical body with both ends opened,
Two lids detachably attached to each end of the cylindrical body in a waterproof state, and a television camera fixed to the inside of one of the two lids and imaging the hole wall surface of the boring hole A reflecting mirror fixed to form an angle of 45 degrees with the optical axis of the television camera inside the other of the two lids, and fixed to the inside of the other lid Bei example an illumination unit for illuminating the hole wall surface of imaging of the television camera with the illumination unit, the outer peripheral side of the cylindrical body
A first illuminator for irradiating only the first direction;
Near the intermediate position of the TV camera, beside the reflector
It is arranged and partially shades the TV camera side
A second illuminator having a smaller light amount than the first illuminator . As described above, according to the present invention, the camera sonde has a casing made of a transparent material cylindrical body, lids are respectively attached to both ends of the cylindrical body, and a television camera is fixed inside one of the lids. a reflecting mirror and an illumination means fixed to the inside of the other cover member, the illumination means of the outer peripheral direction of the cylindrical body
A first illuminator that irradiates the light,
And partially shield the TV camera from the first illuminator.
Since the second illuminator has a small amount of light, when the transparency of the cylindrical body is deteriorated, high transparency is always maintained by replacing only the cylindrical body, and the first and second illuminators are replaced . Each light
The arrangement and light quantity of the light
To efficiently illuminate the imaging site in the borehole
And a clear image can be obtained from the TV camera.

In addition, the borehole television camera device according to the present invention can be inserted into a borehole as required.
And a camera configured to be able to move up and down in the boring hole.
A bore having a sonde and imaging the bore wall surface of the borehole
In an ahole television camera device, the camera sonde
Is a cylindrical body formed of a transparent material and having both ends opened,
Two detachably attached to each end of the cylindrical body in a waterproof state
And the inside of one of the two lids
A television camera fixed to image the hole wall surface of the borehole
Mera and the inside of the other of the two lids
And make an angle of 45 degrees with the optical axis of the TV camera.
And a reflector fixed to the inside of the other lid
And illuminate the hole wall surface for imaging by the TV camera.
An illuminating unit for emitting light, wherein the illuminating unit is provided on an outer periphery of the cylindrical body.
A first illuminator for irradiating only the first direction;
Near the intermediate position of the TV camera, beside the reflector
Approximately 1/3 of the light bulb head
Is applied with black paint, and the light amount is higher than that of the first illuminator.
Has a smaller second illuminator . As described above, in the present invention, the camera sonde is made of a transparent material cylinder.
A casing is provided, and lids are respectively mounted on both ends of the cylindrical body.
And fix the TV camera inside this one lid
And a reflector and lighting means inside the other lid
The first illuminating means irradiates only the outer peripheral direction of the cylindrical body.
Illuminator and the bulb head approximately 1 /
About 3 are applied with black paint and the first illuminator
It should consist of a second illuminator with a smaller amount of light
Therefore, if the transparency of the cylinder deteriorates, only this cylinder
Always maintain high transparency by replacement and directly connect to TV camera
In addition to blocking incident light, the effect of irregular reflection by the cylinder
Can be suppressed, and clear images can be
Can be obtained.

[0009] The borehole television camera device according to the present invention is capable of being inserted into a boring hole and having the boring hole.
Having a camera sonde configured to be able to ascend and descend within the hole,
Borehole TV camera imaging the borehole wall
In the device, the camera sonde is made of a transparent material.
A tubular body formed and open at both ends, and a protection at each end of the tubular body.
Two lids detachably mounted in a water state, and the two lids
Fixed to the inside of one of the lids
TV camera for imaging the wall surface of the
The television camera is provided inside the other one of the lids.
Reflection fixed at an angle of 45 degrees to the optical axis of the laser
A mirror, fixed inside the other lid and
A lighting unit is provided to illuminate the hole wall for TV camera imaging.
The illumination unit irradiates only the outer peripheral direction of the cylindrical body, and
A first illuminator whose TV camera side is shielded from light;
Near the middle position between the illuminator and the TV camera,
A first illuminator which is disposed on a side of the mirror and which is lighter than the first illuminator;
It has a second illuminator with a small volume . Thus, in the present invention, the first illuminator blocks the television camera side.
By illuminating, the arrangement position and the light amount of each of the first and second illuminators have a unique configuration, so that the imaging site in the borehole can be efficiently illuminated.

[0010] The borehole television camera device according to the present invention is capable of being inserted into a boring hole and having the boring hole.
Having a camera sonde configured to be able to ascend and descend within the hole,
Borehole TV camera imaging the borehole wall
In the device, the camera sonde is made of a transparent material.
A tubular body formed and open at both ends, and a protection at each end of the tubular body.
Two lids detachably mounted in a water state, and the two lids
Fixed to the inside of one of the lids
TV camera for imaging the wall surface of the
The television camera is provided inside the other one of the lids.
Reflection fixed at an angle of 45 degrees to the optical axis of the laser
A mirror, fixed inside the other lid and
A lighting unit is provided to illuminate the hole wall for TV camera imaging.
The contact is formed in a thin film from a transparent material and can be separated.
A protective layer with a coating layer on one side
The outer surface of the cylinder is covered . As described above, in the present invention, a thin film-like contact from which the outer surface of the cylindrical body can be peeled off.
Because of being covered with the adhesion layer,
The transparent surface of the cylinder in the camera sonde
Can have a smooth and scratch-free surface shape.
Restore transparency to allow TV cameras to capture sharp images
You.

Further, the borehole television camera device according to the present invention is capable of being inserted into a borehole,
Has a camera sonde that can move up and down in the ring hole
A borehole for imaging the hole wall surface of the borehole.
In the Levi camera device, the other lid is made of a transparent material.
Formed without arranging reflectors,
The TV camera is fixed to the one lid and
The lighting unit is located at a position where light does not directly enter the television camera.
Is fixed, formed into a thin film by a transparent material,
Possible adhesive layer on the protective sheet formed on one side
Thus, the outer surface of the cylindrical body is covered . Thus, in the present invention, the other lid is provided with a reflecting mirror.
And the lighting means on one of the lids
Be sure to fix it with the bicamera, and the camera sonde cylinder
Cover the surface with a transparent protective sheet so that it can be peeled off.
The inner wall of the borehole using a TV camera.
It can be imaged directly, and it is a simple peel
Touch the transparent surface of the cylinder to the camera sonde
The surface can be made smooth and scratch-free, and
TV camera can capture clear images by restoring brightness
You.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of an embodiment of a borehole television camera device according to the present invention. FIG. 1 (A) is a side sectional view, and FIG. 1 (B).
Shows front sectional views, respectively. As shown in the figure,
The borehole television camera device 100 includes a camera sonde 1 that is configured to be insertable into the borehole H and to be able to move up and down the borehole H and to image the hole wall surface S of the borehole H. A system cable 2 is connected to the camera sonde 1 and exchanges signals and the like of the camera sonde 1 and supplies power. In system cable 2,
Although not shown, an elevator, a depth measuring encoder, a control unit, a television monitor, and the like are connected. These configurations and operations are the same as those of the above-described conventional device.

The camera sonde 1 has a cylindrical body 10C.
, Upper lid 10T, lower lid 10B, and television camera 1
1, a plane reflecting mirror 12, and bulbs 14a, 14b, 16
a, 16b and a light shielding plate 15. The cylindrical body 10C is made of a transparent synthetic resin material such as acrylic resin, and is formed in a cylindrical shape with both ends opened. The upper lid 10T and the lower lid 10B are made of metal, synthetic resin, or the like, and are attached to each end of the cylindrical body 10C while maintaining waterproofness and airtightness, and are detachably attached. . An annular concave portion can be appropriately provided inside each of the lids 10T and 10B, and a member for maintaining waterproofness or airtightness such as an O-ring can be provided using the concave portion. Compared to a camera sonde formed by fitting a glass window, the waterproof performance can be significantly improved.

Further, if the camera sonde 1 is used for a long period of time, friction and collision with the hole wall of the boring hole H are repeated, so that the outer surface of the cylindrical body 10C is finely scratched, the transparency is deteriorated, and the television camera is deteriorated. Although the captured image 11 may become unclear, in the camera sonde 1 of the present embodiment, only the cylinder 10C can be replaced with a new one, and the transparency can be easily restored by replacement.
Therefore, transparency can always be kept high,
The image of the television camera 11 can be made clear.

In order to maintain the transparency of the cylinder 10C of the camera sonde 1, another configuration can be adopted. That is, the outer surface of the cylindrical body 10C is covered with a protective sheet (not shown). The protective sheet is a thin film member made of a transparent synthetic resin material, and has a peelable adhesive layer formed on one surface thereof. The adhesive surface of this protective sheet is
By sticking to the outer surface of C, the outer surface of cylindrical body 10C is covered. In this case, even if the cylindrical body 10C repeatedly rubs or collides with the hole wall of the boring hole H due to the long-term use of the camera sonde 1, it is only on the protective sheet surface that the protective sheet is slightly damaged. When the transparency is deteriorated and the image captured by the television camera 11 becomes unclear, the transparency can be easily recovered by peeling the protective sheet and replacing it with a new protective sheet. Therefore, also in this case, the transparency of the cylindrical body 10C can always be maintained high, and a clear image of the television camera 11 can be maintained.

A boring hole H is provided inside the upper lid 10T.
A television camera 11 that captures an image of the hole wall surface S is fixed. Although not shown, a driving source such as a motor is mounted on the television camera 11, and the focal length can be adjusted by driving the motor. The lower lid 1
0B, the angle 4 with respect to the optical axis of the TV camera 11
The plane reflecting mirror 12 is fixed at 5 degrees. Similarly, light bulbs 14a, 14b, 16a, and 16b are fixed at positions near the cylindrical body 10C inside the lower lid body 10B. A light shielding plate 15 is attached above the light bulbs 14a and 14b.

Light bulbs 16a and 16b are provided near the intermediate position between the light bulbs 14a and 14b and the television camera 11, and approximately one third of the head of each light bulb is coated with black paint. Also, assuming that the light quantity of the light bulbs 14a and 14b is L1 and the light quantity of the light bulbs 16a and 16b is L2, L1>
L2 is set so as to be established.

Since the light bulb 1 is constructed as described above,
Since 4a and 14b are arranged close to the cylindrical body 10C with the light shielding action of the light shielding plate 15, they directly irradiate only the outer peripheral direction of the cylindrical body 10C. On the other hand, the light from the light bulbs 14a and 14b is prevented from being incident on the television camera 11 side, and care is taken not to give noise to the captured image of the hole wall surface S. Further, of the light emitted from the light bulbs 16a and 16b, the light toward the television camera 11 is blocked by the black paint, and the light from the light bulbs 16a and 16b irradiates the outer circumferential direction of the cylindrical body 10C. In this case, the light bulbs 16a,
16b is installed at a position relatively distant from the cylindrical body 10C, so that light emitted from the bulbs 16a and 16b in the outer circumferential direction of the cylindrical body 10C is irregularly reflected on the inner surface of the cylindrical body 10C, and considerably reflects the hole wall surface S. Irradiate indirectly over a wide area.
As described above, since the hole wall surface S is illuminated by a combination of direct illumination and indirect illumination, the hole wall surface S can be illuminated very brightly as compared with illumination of only one of them.

In the above description, the electric bulbs 14a and 14b and the light shielding plate 15 constitute a first illuminator, and the electric bulbs 16a and 16b constitute a second illuminator. Also, the light bulbs 14a, 14b
, The light shielding plate 15 and the light bulbs 16a and 16b constitute an illumination unit. Note that the present invention is not limited to the above embodiment. The above embodiment is an exemplification, and has substantially the same configuration as the technical idea described in the scope of the claims of the present invention. It is included in the technical scope of the invention.

For example, as shown in FIGS. 2A and 2B, the lower cover 10b of the camera sonde 1 can be formed of a transparent material. The camera sonde 1 in the present embodiment includes:
The lower lid 10b is made of a transparent material, the television camera 11 and the electric bulbs 14a, 14b (16a, 16b are omitted) are disposed on the upper lid 10T, and the flat reflecting mirror 12 is not disposed. When the lower lid 10b is made of a transparent material as described above, the television camera 11 disposed to face the lower lid 10b is made of a transparent material.
Can directly image the borehole.
By forming the lower lid 10b with a convex lens, for example, a fisheye lens as shown in FIG. 4B, the inner wall of the borehole can be imaged at a wide angle of 360 °.

Further, in the above-described embodiment, an example in which the cylindrical body 10C is formed in a cylindrical shape with both ends opened has been described. However, the present invention is not limited to this. The body may be a cylindrical body having a triangular cross section, a rectangular cross section, an arbitrary polygonal cross section, an elliptical cross section, or the like. Further, in the above-described embodiment, an example has been described in which the first illuminator is configured by the two light bulbs 14a and 14b and the light shielding plate 15, but the present invention is not limited to this, and one or three light bulbs are not limited thereto.
It may be configured to have more than one light bulb. The same applies to the second illuminator.

[0022]

According to the present invention as described above,
The camera sonde has a casing made of a transparent material cylinder, lids are attached to both ends of the cylinder, a television camera is fixed inside one lid, and a reflecting mirror is placed inside the other lid. And the lighting means are fixed, and the lighting means is a cylindrical body.
A first illuminator that irradiates only the outer peripheral direction of the
And partially shade the TV camera side and
Since the second illuminator has a smaller amount of light than the first illuminator, if the transparency of the cylindrical body deteriorates, high transparency is always maintained by replacing only the cylindrical body. And the first
The arrangement position and the amount of light of each of the illuminators and the second
This makes it possible to efficiently illuminate the imaging site in the borehole.
This makes it possible to obtain a clear image from a television camera. In addition, in the present invention, mosquitoes
Melasonde has a casing made of transparent material
Attach the lids to the openings at both ends of the body.
Fix the TV camera inside and inside the other lid
A reflector and an illuminating means are fixed to the
The first illuminator that irradiates only the outer peripheral direction, and the side of the reflector
Approximately 1/3 of the bulb head is painted with black paint.
A second illuminator that is laid and has a smaller light intensity than the first illuminator.
The transparency of the cylinder is poor
In the event of a change, the high transparency is always maintained by replacing only this cylinder.
And directly block light from entering the TV camera.
In addition, the effect of diffuse reflection by the cylinder can be suppressed,
This has the effect that a clear image can be obtained from the television camera . In the present invention, the first illuminator is a television.
Since the camera side is shielded from light and the arrangement positions and the light amounts of the first and second illuminators are made unique, it is possible to efficiently illuminate the imaging site in the borehole. Also, in the present invention, the other lid is
Made of a transparent body without providing a reflector,
Fix the lighting means together with the TV camera,
Rasonde's cylindrical surface can be peeled off with a transparent protective sheet
So that it is covered with a TV camera.
Can directly image the inner wall of the
With a one-touch operation called peeling, the camera sonde is placed on the cylinder
The transparent body surface to be smooth and scratch-free
Can, TV camera to recover the transparency of the cylindrical body is Korea Akiranae
This has the effect of capturing an image .

[Brief description of the drawings]

FIG. 1A is a side sectional view showing a configuration of a borehole television camera device according to an embodiment of the present invention. (B)
1 is a front sectional view showing a configuration of a borehole television camera device according to an embodiment of the present invention.

FIG. 2A is a side sectional view showing a configuration of a borehole television camera device according to another embodiment of the present invention.
(B) is a front sectional view showing a configuration of a borehole television camera device according to another embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a conventional borehole television camera device.

DESCRIPTION OF SYMBOLS 1 Camera sonde 2 System cable 10B Lower lid 10C Cylindrical body 10T Upper lid 11 Television camera 12 Planar reflector 14a, 14b Light bulb 15 Light shield 16a, 16b Light bulb 100 Borehole television camera device 200 Borehole television camera device 201 Camera sonde 202 System cable 203 Control unit 204 Elevator 205 Television monitor 206 Depth measurement encoder 210 Cylindrical body 211 Television camera 212 Flat reflector 213 Glass window 214 Light bulb 215 Compass H boring hole S Hole wall surface

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-56-135819 (JP, A) JP-A 56-46816 (JP, U) JP-A 4-20766 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) H04N 5/225-5/243 H04N 7/18 E21B 49/00 E21B 47/00-47/12 G02B 23/24-23/26

Claims (5)

(57) [Claims] 1. A borehole television camera device having a camera sonde configured to be insertable into a boring hole and capable of moving up and down in the boring hole, and imaging a hole wall surface of the boring hole. A tubular body formed of a transparent material and having both ends opened, two lids detachably attached to each end of the tubular body in a waterproof state, and an inside of one of the two lids A television camera fixed to the television camera for imaging the hole wall surface of the boring hole, and a reflection fixed at an angle of 45 degrees with respect to the optical axis of the television camera inside the other of the two lids. and mirrors, e Bei illumination unit for illuminating the hole wall surface of imaging of the television camera is fixed to the inside of the other cover member, the illuminating unit, the illuminating only the outer circumferential direction of the cylindrical body 1
An illuminator, intermediate between the first illuminator and the television camera
In the vicinity of the position, it is arranged on the side of the reflecting mirror, and
The TV camera side is partially shielded from the first illuminator.
A borehole television camera device comprising a second illuminator having a small light amount . 2. A boring hole which can be inserted into a boring hole, and
With a camera sonde that can move up and down
A borehole for imaging the hole wall surface of the borehole.
In the Levi camera device, the camera sonde is formed of a transparent material and has both ends opened.
Freely attachable and detachable to the released cylinder and each end of the cylinder
Two lids to be mounted on one of the two lids
The inside wall of the boring hole
A television camera for imaging and the other of the two lids
Angled with respect to the optical axis of the television camera inside the lid of
A reflecting mirror fixed to form an angle of 45 degrees,
The camera is fixed inside the lid
An illumination unit for irradiating a hole wall surface to be imaged, wherein the illumination unit irradiates only the outer peripheral direction of the cylindrical body;
An illuminator, intermediate between the first illuminator and the television camera
In the vicinity of the position, it is arranged beside the reflector and
Approximately 1/3 of the head of the light bulb is applied with black paint
And a second illumination having a light amount smaller than that of the first illuminator.
A borehole television camera device comprising a vessel . 3. A boring hole which can be inserted into a boring hole.
With a camera sonde that can move up and down
A borehole for imaging the hole wall surface of the borehole.
In the Levi camera device, the camera sonde is formed of a transparent material and has both ends opened.
Freely attachable and detachable to the released cylinder and each end of the cylinder
Two lids to be mounted on one of the two lids
The inside wall of the boring hole
A television camera for imaging and the other of the two lids
Angled with respect to the optical axis of the television camera inside the lid of
A reflecting mirror fixed to form an angle of 45 degrees,
The camera is fixed inside the lid
An illumination unit that illuminates the wall surface of the hole to be imaged ;
A first illuminator whose left side is shielded from light, and the first illuminator
Near the intermediate position between the reflector and the television camera,
And the amount of light is greater than that of the first illuminator.
A borehole television camera device comprising a small second illuminator . 4. A boring hole which can be inserted into a boring hole.
With a camera sonde that can move up and down
A borehole for imaging the hole wall surface of the borehole.
In the Levi camera device, the camera sonde is formed of a transparent material and has both ends opened.
Freely attachable and detachable to the released cylinder and each end of the cylinder
Two lids to be mounted on one of the two lids
The inside wall of the boring hole
A television camera for imaging and the other of the two lids
Angled with respect to the optical axis of the television camera inside the lid of
A reflecting mirror fixed to form an angle of 45 degrees,
The camera is fixed inside the lid
Adhesive layer that is provided in the form of a thin film made of a transparent material and that can be peeled off.
Is formed on one surface of the cylinder by the protective sheet.
A borehole television camera device , wherein the outer surface of the body is covered . 5. A boring hole which can be inserted into a boring hole.
With a camera sonde that can move up and down
A borehole for imaging the hole wall surface of the borehole.
In the Levi camera device, the other lid is formed of a transparent material and a reflecting mirror is formed.
It is formed without disposing, and the TV camera is fixed to the one lid and
The lighting unit is located at a position where light does not directly enter the television camera.
Is fixed , formed in a thin film of transparent material, and can be peeled off.
Is formed on one surface of the cylinder by the protective sheet.
A borehole television camera device , wherein the outer surface of the body is covered .