JP2724833B2 - Manufacturing apparatus and manufacturing method of hole wall developed image - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a hole wall developed image producing apparatus capable of observing and photographing a azimuthal omnidirectional image of a hole wall and producing a continuous developed image of the entire perimeter of the hole wall. The present invention relates to a method for producing an image.

[Conventional technology]

In geological surveys, it is necessary to know the inclination and continuity of the surface elements such as stratum, joint, and crack. For this reason, a borehole television camera that directly observes the hole wall of a hole excavated by boring is used, but a borehole camera that projects a hole wall with a plane mirror inclined at an angle of 45 ° to the hole wall and shoots it. However, since the range that can be photographed at a time is limited, it is difficult to know the overall ground condition.

In order to know the overall ground condition from the borehole wall,
It is good to make a developed image of the hole wall, but as a method of combining images taken by the above-mentioned borehole TV camera in a mosaic form, a group of multiple observation optical fibers arranged in a plane radially toward the hole wall (See Japanese Patent Application Laid-Open No. 57-7211), irradiating a circular or helical light beam around the major axis of the borehole, and converting the reflected light into an electrical luminance signal. There is a method of scanning the borehole wall and obtaining a developed image of the hole wall by raising and lowering the sonde (see Japanese Patent Application Laid-Open No. 58-223113).

However, in the method according to the above, since the hanging cable is twisted, it takes time and effort to measure the azimuth of each image in order to correctly determine the shooting azimuth of each image, and since many images are synthesized. It is hard to say that it is a simple method. In the method according to the above, since the developed image is taken through each observation optical fiber, the range photographed by each observation optical fiber changes when the distance between the hole wall and the tip of the optical fiber changes due to the unevenness of the boring hole wall. Therefore, there is a disadvantage that a continuous image cannot be obtained as a whole. In the method according to the above method, since the hole wall is scanned by raising and lowering the sonde, it is necessary to keep the raising and lowering speed of the sonde constant. If vibration occurs due to expansion and contraction of the cable in the raising and lowering direction of the sonde, image distortion occurs.
Further, although the direction of the light beam is determined by detecting the deviation from the direction of the N pole, there is a disadvantage that the image is distorted due to the delay or movement of the movement of the pointer of the compass.

Further, in this method, the scanned image is fixed, so that it is difficult to observe the state of spring water from the crack as a dynamic image.

[Problems to be solved by the invention]

In view of the above situation, the present invention observes the state of the hole wall with a full-direction image of a fixed direction sent directly from the sonde and, at a place where a developed image of the hole wall is required, regardless of the unevenness and diameter of the hole wall. It is intended to create a continuous developed image.

[Means for solving the problem]

The gist of the present invention is to provide a transparent window in all directions in a sonde that goes up and down in a boring hole, has a viewing window in the center inside, and rotates the entire circumference in a certain range in the axial direction. The body mirror 14, the illumination lamp thereof, and the compass 13 which accommodates the compass 13 coaxially with the rotating body mirror, and in which the optical axis is shared with the rotating body mirror and which can rotate in the circumferential direction of the sonde, are provided in the sonde. Television camera for photographing the whole circumference of the hole wall and compass, and displaying the image signal from the television camera on the ground, a sonde control device, a photographed image developing device equipped with a photographed image memory and a developed image memory, deployment An apparatus for producing a developed image of a hole wall, comprising: an image display device; and a recording device for recording a omnidirectional image around the hole wall and a developed image.

Hereinafter, the present invention will be described in detail with reference to the drawings. (A) A lifting device 4 is installed on the ground, and a sonde 2 suspended from a boring hole by a cable 3 on the lifting device and a movement of the sonde 2 are detected. A depth sensor 5 that generates an electrical signal at regular intervals is provided.

(B) The sonde 2 is provided with a transparent window 18 in the entire circumferential direction, an illumination lamp 15 and a viewing window at the center, and a rotating mirror 14 which has a certain range in the axial direction. A compass 13 is provided coaxially with the rotating mirror.

(C) In the sonde, a television camera 16 that shares the optical axis with the rotating mirror and rotates in the circumferential direction of the sonde
And this drive device 17 is provided.

(D) a television receiver 6 for displaying an image signal from the television camera on the ground, a sonde controller 7, a photographed image memory 10 and a developed image memory 11, and developed in synchronization with an electric signal from the depth sensor 5; A photographed image developing device 12 for creating images and a recording device 8 for photographed images and developed images are provided.

[Action]

The sonde 2 constructed as described above is inserted into the hole so that the center of the hole coincides with the axis of the sonde, and the image of the entire circumference of the hole wall reflected on the rotating mirror 14 and the viewing window provided on the rotating mirror are passed through. A total of 13 are photographed simultaneously by the TV camera 16. At this time, the direction of the pointer of the N pole of the compass is monitored by the television receiver 6, and the direction of the television camera 16 is driven so that the direction coincides with the direction of magnetic north previously drawn on the screen of the television receiver 6. The adjustment is performed by the device 17 and the sound control device 7. Sonde lift 4
After moving up and down to the position where the developed image is created, in synchronization with the electrical signal from the depth sensor 5 generated at a constant interval corresponding to the sonde distance, an image of the entire circumference of the hole wall at that location is taken. Image memory of the image developing device 9
11, the electrical luminance signals of the respective images are rearranged on a developed image memory 10 to create a developed image. At this time, the photographed image memory 11 stores the photographed image data in the fixed direction all around the fixed direction in the axial direction of the hole wall in a ring shape. That is, the image data is stored in the photographed image memory 11 as pixels on a circumference centered on a position corresponding to the optical axis of the sound 2.
Is always taken from a fixed position in a fixed direction and at a certain interval. Then, the photographed image data on the circumference is sequentially linearly rearranged on the developed image memory 10 in the row direction, that is, in the horizontal direction of the developed image memory. This is used as a unit development image of the hole wall, and the generation of the unit development image is repeated in response to the electrical signals generated one after another by the movement of the sound 2, and these are sequentially arranged in the column direction, that is, in the vertical direction of the development image memory. A developed image of the continuous hole wall is created and displayed on the transfer image display device 12. At this time, the row direction, ie, the horizontal direction, of the developed image data created in the developed image memory corresponds to the entire circumferential direction of the hole wall, and the column direction, ie, the vertical direction, corresponds to the depth direction of the hole wall. Also, if the movement of the sonde is stopped at a specific location in the hole, the above deployment work is performed by changing the radius of the circumference at this position, and if it is arranged in the row direction according to the radius, there is no movement of the sonde. Then, a developed image of the location can be obtained. If this is repeated within a short time and displayed at the same location on the developed image display device, the developed image at that location can be observed as a dynamic image.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the apparatus of the present invention, and FIG.
FIG. 3 is a cross-sectional view showing one embodiment of the sound of the apparatus of the present invention, FIG. 3 is a cross-sectional view showing another embodiment of the sound, and FIG. FIG. 5 is a diagram showing an example of correspondence between pixels and memory numbers of a fixed-direction all-around image of a hole wall, and FIG. 5 is a diagram in which the image shown in FIG. 4 is developed over a plurality of rows in response to an electric signal from a depth sensor. FIG. 6 is a diagram showing an example of a method of creating a developed image by arranging the images in the column direction. FIG. 6 is a diagram showing an example of developing an image by performing line-by-line development in accordance with an electric signal from a depth sensor. FIG. 4 is a diagram showing an example of a method for creating a.

As shown in FIG. 1, a hole wall developed image producing apparatus according to the present invention detects a lift device 4 installed on the ground, a sonde 2 suspended by a cable 3 therefrom, and movement of the sonde 2, and generates electricity at a constant interval. A depth sensor 5 for generating a target signal, a television receiver 6 for displaying an image of the entire circumference of the hole wall 1 from the sonde,
A sonde control device 7 for controlling the direction of the television camera 16 while monitoring the image, a photographed image developing device 9 having a photographed image memory 11 and a developed image memory 10 for developing the image, a developed image display device 12, The recording apparatus 8 includes a fixed orientation full-circumference image of a hole wall and a developed image.

In the example shown in FIG. 2, an angle α between the tangent of the mirror surface of the rotating mirror and the rotation axis on a plane including the rotation axis, and an angle θ between the straight line connecting the focal point of the television camera lens and the contact point and the rotation axis But,
A rotating mirror 14 that satisfies α = 45 ° −θ / 2 is provided, and a compass 13
TV camera 16 so that the direction of the north pole pointer coincides with the direction of magnetic north previously drawn on the screen of the television receiver 6.
Is adjusted by the driving device 17 and the sound control device 7, and the entire circumference of the hole wall is photographed in a fixed direction.

In the example shown in FIG. 3, the length of the hole wall in the longitudinal direction between the rotating mirror 14 and the television camera 16 where α is α = 45 ° matches the axial length of the rotating mirror. Correction lens 19
The direction of the pointer of the north pole of the compass 13 and the TV receiver 6
The direction of the television camera 16 is adjusted by the driving device 17 and the sonde control device 7 so that the direction of the magnetic north previously drawn on the screen of FIG.

In the example shown in FIG. 5, every time the sonde 2 moves a fixed distance, an electric signal is generated from the depth sensor 5, and in synchronization with this, a signal corresponding to the moving range of this section shown in FIG. The electrical luminance signal is captured from the circumference with different radii on the photographed image memory 11 and rearranged to create a developed image consisting of a plurality of rows on the developed image memory 10 and correspond to the movement of the sonde. A developed image is created continuously by arranging in the column direction.

In the example shown in FIG. 6, in synchronization with one electric signal from the depth sensor 5, an electric luminance signal of a pixel is fetched from the circumference of a fixed radius of the photographed image memory 11 and rearranged to obtain a developed image memory. A developed image of one row is created on 10 and is arranged in the column direction corresponding to the movement of the sonde to create a continuous developed image.

〔The invention's effect〕

As described above, according to the apparatus and method for producing a developed hole wall image according to the present invention, since the entire periphery of the hole wall is simultaneously and azimuthally photographed by the rotating mirror, relative directions such as crack directions in the circumferential direction of the hole are obtained. Since there is no element causing an error in the positional relationship, and the photographing range in the length direction of the hole is constant irrespective of the change in the hole diameter or the unevenness of the hole wall, a continuous developed image can be obtained. Since the operation is performed while monitoring the entire circumference image of the hole wall sent from the sonde, it is possible to immediately respond to changes in the compass caused by twisting of the cable. Since the state of the hole wall can be determined from the perimeter image of the hole wall sent from the sonde, the movement speed of the sonde can be increased in portions where it is not necessary to create a developed image, and the investigation can be performed efficiently. Since the structure of the sonde is simple, it has advantages such as high durability.
In addition, it is possible to dynamically observe the state of the hole wall with a developed image, and to observe phenomena that were previously difficult to observe as a developed image, such as the direction of the groundwater flowing into the hole and the progress of loosening. can do.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the apparatus of the present invention, FIG. 2 is a cross-sectional view showing one embodiment of a sonde of the apparatus of the present invention,
FIG. 3 is a cross-sectional view showing another embodiment of the sonde, and FIG. 4 is one of correspondences between pixels of a fixed-direction full-circumferential image of a hole wall reflected on a rotating mirror and memory numbers taken into a photographed image memory. FIG. 5 is a diagram showing an example, and FIG. 5 is a diagram in which the image shown in FIG. 4 is developed over a plurality of rows in accordance with an electric signal from a depth sensor.
FIG. 6 shows an example of a method of creating a developed image by arranging the images in the column direction, and FIG. 6 develops the lines one by one corresponding to the electric signal from the depth sensor, and arranges the developed images in the column direction. FIG. 6 is a diagram illustrating an example of a creating method. DESCRIPTION OF SYMBOLS 1 ... Boring hole wall 2 ... Sonde 3 ... Cable 4 ... Lifting device 5 ... Depth sensor 6 ... TV receiver (photographed image monitor) 7 ... Sonde control device 8 ... Recording device 9 ... Photographing Image developing device 10… Developed image memory 11… Photographed image memory 12 …… Developed image display device 13 …… Azimuth meter 14… Rotating mirror 15 …… Illumination lamp 16 …… TV camera 17 …… Drive device 18… … Transparent window 19 …… Correction lens

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location H04N 7/18 E21B 47/00

Claims (3)

(57) [Claims] 1. A rotary mirror which has a transparent window in all directions in a sonde which rises and lowers in a boring hole, has a viewing window in the center thereof, and has an entire circumference in a certain range in the axial direction. And the illuminating lamp and the compass coaxially with the rotating body mirror are housed therein, and further, in the sonde, the optical axis is shared with the rotating body mirror and the drive unit can rotate in the circumferential direction of the sonde. A television camera for photographing the entire circumference of the rotating body mirror and a compass, a television receiver for displaying an image signal from the television camera on the ground, a sonde control device, a photographed image memory in which the photographed image is directly taken, and the photographed image A photographed image developing device equipped with a developed image memory for storing developed image data stored by rearranging photographed image data captured in a memory, a developed image display device, and a fixed orientation all around the hole wall And a recording device for a developed image. The television camera is controlled by the sonde control device and the driving device such that the pointer of the compass taken by the television camera always points in a fixed direction on the photographed image when photographing the television camera. A hole-wall developed image producing apparatus characterized by rotating. 2. A perforated wall developed image producing apparatus according to claim 1, wherein the rotating mirror is a conical mirror having a constant vertical angle and a viewing window in the center, and a correction lens is provided between the rotating mirror and the television camera. 3. The hole wall developed image producing apparatus according to claim 1, wherein the electricity of the pixels of the omnidirectional omnidirectional image of the hole wall taken into the photographed image memory is synchronized with the electric signal generated by the depth sensor. A method for producing a hole-wall developed image, comprising: rearranging a target luminance signal by converting a memory coordinate of a pixel to produce a developed image of the entire circumference of the hole wall on a developed image memory.