JP2511961Y2 - Article surface photographing device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an article surface photographing apparatus used for three-dimensionally and nondestructively measuring the surface shape of a steel member such as a steel structure after corrosion. .

[0002]

2. Description of the Related Art Conventionally, as a non-contact type three-dimensional shape measuring apparatus, as disclosed in Japanese Patent Laid-Open No. 1-244303, a knife edge for projecting parallel light rays on an object and intercepting the parallel light rays on the way. There is known a device which is provided with an image sensor and which analyzes unevenness of a subject from an image of a knife edge reflected on the subject. Further, as a concrete crack measuring system, as disclosed in Japanese Patent Application Laid-Open No. 2-259513, a fixed-base-line stereo photography means having two cameras for photographing cracks on a concrete surface and a fixed-base-length stereo A crack measuring system including a crack measuring means for measuring cracks in concrete based on a stereo photograph taken by a photographing means is known.

[0003]

[Problems to be Solved by the Invention] The conventional non-contact type 3
In the case of a three-dimensional shape measuring apparatus, since the knife edge is moved to scan parallel rays, the apparatus becomes complicated and it is unsuitable for unevenness analysis of a large area. Further, in the case of the conventional concrete crack measuring system, since two cameras are required, the manufacturing cost of the measuring device becomes high,
Moreover, it is difficult to relatively position and fix the two cameras, and it is possible to shoot indoors, but it is difficult to shoot outdoors.

[0004]

In order to advantageously solve the above-mentioned problems, in the first article surface photographing apparatus of the present invention, the lower part of the photographing box 2 mounted on the surface of the article 1 to be photographed is provided. One camera 3 which is opened and photographs the surface of the article 1 to be photographed is arranged at the center of the upper portion of the photographing box 2, and is fixed to the camera 3 by a support member 4 fixed to the upper portion of the photographing box 2. The movable holding member 5 is pivotally attached by a tightening and fixing screw rod 6 extending in the front-rear direction, and the camera 3 is attached to the support member 4 and the tightening and fixing screw rod 6 at a constant angle with the screw rod 6 as a center. The stoppers 7 and 8 and the engaging member 9 for rotating only the vertical mirrors 12 and 13 are fixed to the left and right side walls 10 and 11 in the photographing box 2, and the upper part in the photographing box 2 is fixed. The lighting fixture 14 is attached to. In the second article surface photographing apparatus of the present invention, the photographing box 2 placed on the surface of the article to be photographed
Open the lower part of the camera and shoot the surface of the article 1 1
A single camera 3 is fixed to a support member 4 of a side wall 10 of the photographing box 2, and a side surface of the photographing box 2 facing the camera 3 is attached to
A single mirror 12 is arranged, and the rotating shaft member 31 fixed to the mirror 12 allows the mirror 12 to rotate by a predetermined angle, and the lighting fixture 14 is attached to the upper part of the photographing box 2.

[0005]

1 to 8 show an article surface photographing apparatus according to a first embodiment of the present invention, in which an article to be photographed 1
The lower part of the metal photographing box 2 placed on the surface 15 of the photographing box is opened, and the vertical female screw holes 16 provided at the four corners of the photographing box 2 are fixed to the seat plate 17 for height adjustment. Longitudinal rod 18
A rubber shading member 19 is fixed to the outer periphery of the lower end of the photographing box 2 by a bolt 20 and a band-shaped press fitting 21.

An opening 23 is provided at the center of the top plate 22 of the photographing box 2, and the front surface 15 of the article 1 to be photographed.
One camera 3 for taking a picture is arranged at the upper center of the upper plate 22, a movable holding member 5 is fixed to the rear part of the camera 3, and a support member is provided on the upper outer surface of a back plate 24 in the photographing box 2. 4 is fixed by a bolt 25, and a fastening fixing screw rod 6 is fixed by welding to the central upper portion of the rear vertical plate body 26 of the movable holding member 5, and the fastening fixing screw rod 6 is located above the supporting member 4. A wing nut 27 for tightening and fixing the movable holding member 5 to the support member 4 is screwed into the tightening / fixing screw rod 6 so as to be rotatably inserted in a through hole provided in.

An arcuate hole 28 centered on the screw rod 6 is provided in the middle of the support member 4, and the engaging member 9 fixed to the lower portion of the rear vertical plate 26 of the movable holding member 5 is The both ends of the arc-shaped hole 28 are stoppers 7 and 8 for engaging the engaging member 9, and the camera 3 is moved from the horizontal position while the wing nut 27 is loosened. When it is rotated by a certain angle, such as 15 °,
When the engaging member 9 strikes the stopper 7 and the camera 3 is rotated from the horizontal position to the other by a certain angle, for example, 15 °, the engaging member 9 strikes the stopper 8 and the camera 3 is rotated 15 ° to one side or the other side. Wing nut 2
Tighten 7 to fix the camera 3 in a tilted state. Alternatively, the camera 3 may be arranged and fixed so as to face directly below without tilting, and in this state, the surface 15 of the article 1 to be photographed can be photographed.

A light-blocking bellows 29 is interposed between the camera 3 and the upper plate 22 of the photographing box 2, and vertical mirrors 12, 13 are fixed to the left and right side walls 10, 11 in the photographing box 2. And a luminaire 1 on the upper part inside the side walls 10 and 11.
4 is attached to the outside of the photographing box 2, and the lighting fixture 1
A battery 30 for supplying power to No. 4 is attached. A black cloth is attached to the inner surface of the photographing box 2 other than the mirrors 12 and 13.

When the article surface photographing apparatus of the present invention is used to three-dimensionally and nondestructively measure the surface shape of an article, such as a steel member, after corrosion, the article surface photographing apparatus is used to measure the article surface photographing apparatus from the steel member. The object to be photographed 1 is placed on the surface 15, and the vertical screw 18 for height adjustment is rotated to adjust the levelness of the photographing box 2. Next, the camera 3 is oriented at a right angle to the surface 15 of the article 1 to be photographed, that is, the main body of the camera 3 is in a horizontal state and fixed with a wing nut 27, and then the camera 3
The surface 15 of the article 1 is photographed by. Next, the camera 3 is fixed by tilting it in one direction at a constant angle of, for example, 15 ° from the horizontal state to the state shown in FIGS. 9 and 10, and then the surface 15 is photographed by the camera 3. Next, the camera 3 is fixed while being tilted in another direction at a constant angle, for example, 15 °, and then the surface 15 is photographed by the camera 3. Note that the camera 3 is used to analyze the unevenness from the two photographs.
The larger the angle is, the more the accuracy is improved, but the dimensional accuracy is deteriorated due to the difference in perspective. Preferably, the one-sided swing angle of the camera 3 is 30 degrees or less.

In the case of the present invention, two cameras are used by one camera 3.
Since the surface is photographed from the direction, the unevenness of the surface 15 of the article 1 to be photographed can be analyzed using a simple and small device. Further, since the camera 3 is arranged at a constant distance from the surface 15 and the camera 3 is fixed at a constant angle, the magnification and accuracy of the photographing by the camera 3 can be made constant. In addition, in the analysis of the unevenness from the two photographs, the accuracy improves as the angle of the camera 3 increases,
Due to the difference in perspective, the dimensional accuracy is reduced. It is suitable to set the swing angle of the camera 3 to 30 degrees or less.

Further, since the photographing box 2 is adopted, hues and shadows due to external light rays are blocked, so that an analysis error can be eliminated, and the article surface photographing device is small and lightweight, so that it is easy to carry. Yes, so it is suitable for use anywhere outdoors. Underwater photography is also possible. However, when used underwater, the camera 3, lighting device 14 and battery 30 are waterproof,
In order to avoid the influence of turbidity of water, it is necessary to close the lower part of the photographic box 2 with transparent glass so that the inside of the photographic box 2 can be filled with clear water without turbidity.

11 to 12 show an article surface photographing apparatus according to a second embodiment of the present invention, which is a side plate 10 of a metal photographing box 2 placed on the surface 15 of a photographed article 1. An opening 23 is provided in the camera, one camera 3 for photographing the surface 15 of the article 1 to be photographed is arranged in the opening of the side plate, and is fixed to the rotating shaft member 31 on the side plate opposite to the camera 3. The mirror 12 is installed, and the rotation shaft member 31 penetrating the photographing box 2 is rotated by a fixed angle, so that the mirror 12 can be rotated by a fixed angle. If the angle of the mirror 12 is 45 degrees with respect to the camera 3, it is possible to obtain a photograph of the front of the object to be photographed, and for example, rotate the mirror 12 back and forth by 7.5 degrees about the position of the mirror 12. If
It is possible to obtain two photographs similar to those obtained by rotating the camera 3 by 15 degrees in the first embodiment. Further, as the rotation method of the mirror 12, the rotary shaft member 31 can be manually rotated as shown in FIG. 12, but it can also be automatically rotated by a fixed angle in conjunction with the camera 3.

[0013]

According to the present invention, the lower part of the photographing box 2 placed on the surface of the object 1 to be photographed is opened, and the object 1 to be photographed is opened.
One camera 3 for photographing the surface of the photographing box 2 is arranged at the center of the upper part of the photographing box 2, and a movable holding member 5 fixed to the camera 3 is attached to a support member 4 fixed to the upper portion of the photographing box 2. A stopper 7 pivotally attached by a tightening and fixing screw rod 6 extending in the front-rear direction, and for rotating the camera 3 around the screw member 6 by a certain angle with respect to the support member 4 and the tightening and fixing screw rod 6. , 8 and an engaging member 9 are provided, vertical mirrors 12 and 13 are fixed to left and right side walls 10 and 11 in the photographing box 2, and a lighting fixture 14 is attached to the upper portion in the photographing box 2. Alternatively, the lower part of the photographing box 2 placed on the surface of the article 1 to be photographed is opened, and one camera 3 for photographing the surface of the article 1 to be photographed is fixed to the supporting member 4 of the side wall 10 of the photographing box. , 1 on the side of the side wall of the photographing box 2 facing the camera 3.
Since the mirrors 12 are arranged and the rotating shaft member 31 fixed to the mirrors 12 allows the mirrors 12 to rotate at a fixed angle, and the lighting fixture 14 is attached to the upper part of the photographing box 2, The surface of the article can be easily photographed by a small-sized photographing device having a simple configuration using one camera 3, and the surface of the article can be photographed easily both indoors and outdoors, Further, since it is possible to take a picture from a certain angle at a certain distance from the surface of the article, it is possible to easily perform image analysis.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an article surface photographing apparatus according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional side view showing the article surface photographing device according to the first embodiment of the present invention.

FIG. 3 is a plan view showing the article surface photographing device according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional plan view showing the article surface photographing apparatus according to the first embodiment of the present invention.

FIG. 5 is a vertical cross-sectional side view showing a part of FIG. 2 in an enlarged manner.

FIG. 6 is a vertical sectional side view showing a part of FIG. 5 in an enlarged manner.

FIG. 7 is a vertical sectional front view showing a part of the lower portion of the photographing box.

FIG. 8 is a rear view showing the upper portion of the article surface photographing device.

FIG. 9 is a vertical sectional front view showing a usage state of the article surface photographing device according to the first embodiment of the present invention.

FIG. 10 is a rear view showing the upper portion of FIG.

FIG. 11 is a vertical sectional front view showing an article surface photographing apparatus according to a second embodiment of the present invention.

FIG. 12 is a front view showing an article surface photographing device according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Object to be photographed 2 Photographing box 3 Camera 4 Support member 5 Movable holding member 6 Tightening and locking screw rod 7 Stopper 8 Stopper 9 Engaging member 10 Side wall 11 Side wall 12 Mirror 13 Mirror 14 Lighting fixture 15 Surface 16 Female screw hole 17 Seat plate 18 Vertical screw rod for height adjustment 19 Light-shielding member 20 Bolt 21 Belt-shaped metal fitting 22 Top plate 23 Opening 24 Back plate 25 Bolt 26 Rear vertical plate 27 Wing nut 28 Arc-shaped hole 29 Light-shielding bellows 30 Battery 31 Rotating shaft member 32 Lever 33 spring 34 locking pin 35 locking hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Miyoshi Osawa 20-1 Shintomi, Futtsu City, Chiba Shin Nippon Steel Co., Ltd. Technology Development Division (56) References JP-A-61-33091 (JP, A)

Claims (2)

(57) [Scope of utility model registration request] 1. A camera 3 for taking a picture of the surface of the article 1 to be photographed is arranged at the center of the upper part of the picture box 1 by opening the lower portion of the photographing box 2 placed on the surface of the article 1 to be photographed. Then, the camera 3 is attached to the support member 4 fixed to the upper part of the photographing box 2.
The movable holding member 5 fixed to the above is pivotally attached by a tightening and fixing screw rod 6 extending in the front-rear direction, and the camera 3 is attached to the support member 4 and the tightening and fixing screw rod 6 with the screw rod 6 as the center. Stoppers 7 and 8 for rotating a fixed angle and an engaging member 9 are provided, and both left and right side walls 10 and 1 in the photographing box 2 are provided.
1. An article surface photographing apparatus in which vertical mirrors 12 and 13 are fixed to 1 and a lighting fixture 14 is attached to the upper part of the photographing box 2. 2. A side wall 10 of the photographing box 2 is supported by a camera 3 which opens the lower part of the photographing box 2 placed on the surface of the photographing object 1 and photographs the surface of the photographing object 1. It is fixed to the member 4 and is attached to the side surface facing the camera 3 in the photographing box 2.
An article surface in which a plurality of mirrors 12 are arranged, the mirror 12 can be rotated by a fixed angle by a rotary shaft member 31 fixed to the mirror 12, and a lighting fixture 14 is attached to the upper part of the photographing box 2. Imaging device.