JP2002072349A - Photographic device for tunnel wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photographic device for a tunnel wall which can save labor in photographing, can shorten photographic time and can easily correct the distortion of a photographic image. SOLUTION: The photographic device 1 for photographing the tunnel wall 12 excavated by a tunnel excavating machine, such as a TBM 10, has a camera holding base 18 which is mounted on the surface of the tunnel excavating machine facing the tunnel wall 12, plural CCD cameras 17 or digital cameras which are mounted at the camera holding base 18 in order to photograph the tunnel wall 12 and are arranged in one row along the circumferential direction of the camera holding base 18, a transparent cover which is mounted at the camera holding base in order to provide waterproofing and dustproofing of the plural CCD cameras 17 or the digital cameras, and a computer 15 for simultaneously controlling the photographic operations of the plural CCD cameras 17 or the digital cameras.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for photographing a tunnel wall, and more particularly to an apparatus for photographing a tunnel wall mounted on a tunnel excavator such as a TBM (tunnel boring machine).

[0002]

2. Description of the Related Art Conventionally, as a method for recording a tunnel wall immediately after excavation by a TBM, for example, visual sketching or photographing with a digital camera, a silver halide camera (normal steel camera), or the like has been performed.

[0003]

However, there is a problem that it takes too much time with the conventional visual sketch. In addition, in the case of photographing with a digital camera or a silver halide camera, a worker operates one camera to take a picture, so that the range that can be recorded in one photographing is small, and the tunnel wall for one excavation length by TBM is used. In the case of photographing a photograph, the photographing range has to be photographed several times, and these photographed images have to be joined.

[0004] In this case, since manual work is required, it takes time and effort. In addition, since the photographing position of the camera is different for each image, a developed image formed by connecting these images includes:
There was a problem that distortion was included.

Further, in order to minimize distortion in a developed image, it is necessary to take pictures while paying attention to splicing at the time of photographing, and there is a problem that the efficiency of photographing is reduced.
Furthermore, since the digging operation by the tunnel digging machine cannot be performed during the photographing, there is a problem that the construction period of the tunnel digging is extended.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem. It is possible to reduce the time and effort required for photographing, shorten the photographing time, and easily reduce the distortion of a photographed image. It is an object of the present invention to provide a photographing device for a tunnel wall which can be corrected.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a photographing device for a tunnel pit wall, and is configured as follows to solve the above-mentioned technical problem. That is, the present invention is an imaging apparatus for photographing a tunnel wall excavated by a tunnel excavator, wherein a camera holding table attached to a surface of the tunnel excavator opposed to the tunnel wall, A plurality of CCD cameras or digital cameras attached to the camera holding base and arranged in a line along the circumferential direction of the tunnel well wall, and waterproof and dustproof of the plurality of CCD cameras or digital cameras. And a computer for simultaneously controlling the photographing operations of the plurality of CCD cameras or digital cameras.

[0008] According to this tunnel wall photographing apparatus, the photographing operation of a plurality of CCD cameras or digital cameras is simultaneously controlled by a computer, so that a required area of the tunnel wall, for example, one excavation length of a tunnel excavator, is obtained. In addition, a relatively wide range in the circumferential direction of the tunnel can be photographed at a time. Further, since the photographed image is transmitted as a digital signal, by processing the digital signal with a computer, the image photographed obliquely with respect to the tunnel wall can be easily corrected.

Next, each component will be described. (Tunnel excavator) Although it can be applied to almost all tunnel excavators including the full-section excavator and the free-section excavator, it is particularly suitable for all types of TBM. In the TBM, a portion to which the camera is attached is separated from the tunnel pit wall to some extent, and the interval is kept constant, so that image processing becomes easy. (Camera holding base) A plurality of CCD cameras or digital cameras are arranged and held in a line in the circumferential direction of the tunnel. Provided with angle adjusting means for adjusting the mounting angle in the circumferential direction of the tunnel. (CCD camera or digital camera) CCD (charge-cou) for photoelectrically converting input light and outputting it as a digital signal in order to process a captured image by a computer.
A pleated device (charge coupled device) camera or a digital camera is used. When a CCD camera is used, a digital signal is constantly transmitted to a computer, so that the tunnel wall can be constantly monitored by using a monitor. (Transparent cover) For example, a transparent cover formed in a spherical shape with transparent acryl or the like can be exemplified. (Computer) A small personal computer (hereinafter, referred to as a personal computer) that is easy to handle and used at a tunnel excavation site is preferable.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a photographing apparatus for a tunnel wall according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a view showing a state in which a photographing apparatus 1 for a tunnel wall according to the present invention is mounted on an improved open type TBM (tunnel boring machine) 10. The tunnel wall image capturing apparatus 1 captures an image of a tunnel wall 12 of a tunnel 11 excavated by the TBM 10.
The ground of the tunnel 11 needs some degree of independence.

The TBM 10 excavates the entire cross section of the tunnel 11 at a time. The gripper 1 applies pressure to the cutter head 10 a by pressing the cutter head 10 a, the main beam 10 b as a body, and the pit wall 12.
0c. The main beam 10b has a TBM
A thrust cylinder (not shown) for propelling 10 is provided. The TBM 10 is an improved open type, and is provided with a top roof 10d.

The photographing device 1 includes a photographing unit 14 attached to a surface of the main beam 10b facing the tunnel wall 12.
And an imaging personal computer 1 for controlling the operation of the imaging unit 14.
5 and an image processing personal computer 16 that performs image processing on an image photographed by the photographing unit 14.

As shown in FIG. 2, the photographing section 14 has a plurality of CCD cameras 17 and a camera holder 18 for holding the CCD cameras 17. In the present embodiment, three CCD cameras 17 are provided.
Each of the CD cameras 17 has a certain range in the longitudinal direction of the tunnel pit wall 12, here at least the TBM1.
A range L corresponding to one excavation length of 0 is photographed.

Further, these CCD cameras 17 are shown in FIG.
As shown in FIG. 2, they are arranged in a line at appropriate intervals along the circumferential direction of the tunnel 11. Then, by combining these three CCD cameras 17, a predetermined range in the circumferential direction of the tunnel pit wall 12, here, a range of the angle α around the optical axis set point of each CCD camera 17 is photographed. It has become.

In the present embodiment, as shown in FIG.
One photographing unit 14, 14 is attached to each of the left and right sides of the main beam 10b of the BM 10, and the tunnel 1
When the center of 1 is used as a reference, each photographing unit 14 photographs a range of an angle (2 × β) in total from the center 19 of the top end of the tunnel 11 to the left and right sides in the circumferential direction by an angle β. Has become. The photographing angle β can be set to, for example, about 110 degrees.

The camera holder 18 shown in FIG. 3 can adjust the photographing range of the CCD camera 17 in the circumferential direction. That is, the camera holding base 18 is mounted on the TBM 1
0, an adjustment screw 21 rotatably attached to the base 20, a base 22 pivotally attached to an end of the base 20, and an adjustment screw 2 at one end.
1 is provided with a lever 23 rotatably attached to the free end side of the base 22 at the other end and a handle 24 fixed to an end of the adjustment screw 21. In the base 22,
The CCD camera 17 is fixed.

In the camera holding base 18, by turning the handle 24, the adjustment screw 21 is rotated, and the lower end of the lever 23 screwed into the adjustment screw 21 in FIG. As a result, the upper end of the lever 23 moves up and down, the base 22 pivots about the lower end by a predetermined angle, and the relative angle with the tunnel wall 12 in the circumferential direction changes. This allows the CCD camera 17
Can adjust the shooting range in the tunnel circumferential direction. The base 22 is provided with a spherical transparent cover 25 for waterproofing and dustproofing the CCD camera 17.

As shown in FIG. 1, the images photographed by the three CCD cameras 17 are constantly supplied to, for example, a photographing personal computer 15 installed in an operator room, and are constantly displayed on a monitor 26 thereof. Therefore, the operator of the photographing step control 15 can constantly monitor the state of the tunnel pit wall 12. When the operator operates the photographing personal computer 15 and controls the shutters of the three CCD cameras 17 simultaneously, the photographed image can be recorded on an appropriate recording medium such as the MO disk 21, for example. .

This floppy (registered trademark) disk 21
Is an image processing personal computer 16 installed in an office, for example.
Here, development of a development view of the tunnel wall 12 and data management are performed.

As the image processing, for example, an image obtained by obliquely photographing the tunnel shaft wall 12 is corrected to an image viewed from the front, or each photographed image of the CCD camera 17 is converted into a tunnel axial direction and a tunnel circumferential direction. To obtain a developed image of the tunnel pit wall 12. Also, an arbitrary range can be output as an image file from the developed image. Note that the photographing personal computer 15
The image processing personal computer 16 can be connected online.

As described above, according to the tunnel wall photographing apparatus 1 of the present invention, by controlling a plurality of CCD cameras 17 simultaneously, a necessary range of the tunnel wall 12, for example, one excavation length of the TBM 10 is obtained. In addition, a relatively wide range in the circumferential direction of the tunnel 11 can be photographed at a time. Therefore, since it is not necessary to repeat photographing many times or to connect photographed images, it is possible to greatly reduce labor.

The photographed image is subjected to image processing by the image processing personal computer 16, so that the tunnel wall 12
Can be easily corrected, and the state of the tunnel wall 12 can be accurately determined.

Further, since the photographing range of the CCD camera 17 in the circumferential direction of the tunnel can be adjusted by the camera holding table 18, even if the size of the TBM 10 or the tunnel 11 is changed, it is possible to respond quickly.

In the above-described embodiment, the present invention is applied to the improved open type TBM 10. However, the present invention is also applicable to a normal open type TBM without a roof or the like.
Also, the present invention can be applied to all tunnel excavators such as a full-section excavator such as a shield-type TBM other than one in which all-around segments are assembled, and a free-section excavator such as a cutter loader. However, in the free-section excavator, since the distance between the portion where the photographing unit 14 is mounted and the tunnel wall 12 changes, image processing becomes somewhat troublesome.

The CCD camera 1 in the photographing section 14
The number of used cameras 7 is not limited to three, and can be any number. Further, the number of photographing units 14 is not limited to two, and any number can be used. Further, a digital camera can be used instead of the CCD camera 17.

[0027]

As described above, according to the present invention,
By simultaneously controlling the photographing operations of a plurality of CCD cameras or digital cameras, it is possible to photograph a wide range in the circumferential direction of the tunnel at a time, for example, for one excavation length of a tunnel excavator. Therefore, it is not necessary to repeat photographing or join photographed images as in the related art, so that labor can be saved.

Further, since the photographed image is output as a digital signal, the image signal can be processed by a computer, whereby the distortion of the image can be easily corrected. Therefore, the state of the tunnel pit wall can be accurately determined.

[Brief description of the drawings]

FIG. 1 is a view showing a state in which a photographing device for a tunnel wall according to the present invention is attached to an open-type TBM.

FIG. 2 is a view taken in the direction of arrow A in FIG. 1;

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a view showing a photographing range of a CCD camera according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Photographing apparatus 10 TBM (tunnel excavator) 11 Tunnel 12 Tunnel wall 15 Personal computer for photography 16 Personal computer for image processing 17 CCD camera 18 Camera holding stand 25 Transparent cover

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03B 19/02 G03B 19/02 (72) Inventor Kenichi Kondo Maeda 2-10-26 Fujimi 2-chome, Chiyoda-ku, Tokyo Inside Construction Industries Co., Ltd. (72) Inventor Katsuya Miyake 2-2-1, Nishihonmachi, Nishi-ku, Osaka-shi, Osaka, Japan Intra-company Co., Ltd. Reax Co., Ltd. (72) Inventor Masanao Kanai Hokkaido, Sapporo City, Higashi-ku, Kita 24-Jo Higashi 17-chome 1-1-12 Reax Co., Ltd. F-term (reference) 2D054 AC20 2H0 54 AA01 2H105 AA03 AA12 DD07 EE08 EE16

Claims (6)

[Claims] 1. A photographing apparatus for photographing a tunnel digging wall excavated by a tunnel digging machine, comprising: a camera holding stand attached to a surface of the tunnel digging machine facing the tunnel digging wall; For photographing, a plurality of CCD cameras or digital cameras attached to the camera holding base and arranged in a line along the circumferential direction of the tunnel well wall, and waterproof and dustproof the plurality of CCD cameras or digital cameras. An apparatus for photographing a tunnel tunnel wall, comprising: a transparent cover attached to the camera holding base to perform the photographing; and a computer for simultaneously controlling photographing operations of the plurality of CCD cameras or digital cameras. 2. The method according to claim 1, wherein the camera holding table includes the plurality of CCDs.
The CCD camera comprises: a base for fixing a camera or a digital camera; and angle adjusting means for adjusting a relative angle of the base in the tunnel circumferential direction. The CCD camera is adjusted by adjusting a relative angle of the base in the tunnel circumferential direction. The photographing device for a tunnel wall according to claim 1, wherein a photographing range of the digital camera in a circumferential direction of the tunnel is adjusted. 3. The photographing apparatus according to claim 1, further comprising an image processing computer that performs image processing on an image photographed by the CCD camera or the digital camera. 4. The apparatus according to claim 3, wherein an image obtained by obliquely photographing the tunnel wall is corrected to an image viewed from the front by the image processing computer. 5. The tunnel according to claim 3, wherein the captured images of the CCD camera or the digital camera are connected in the axial direction of the tunnel and in the circumferential direction of the tunnel to obtain a developed image of the tunnel well wall. Underground photographing equipment. 6. The photographing apparatus for tunnel wall according to claim 5, wherein an arbitrary range from the developed image of the tunnel wall is output as an image file.