JP2000310698A - Visual inspection method and device of drum preserving radioactive waste using digital line camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide objectivity with specimens better than visual inspection in a method photographing drum surface with a camera by indicating the drum surface with continuous image without a break, observing the appearance of whole drum surface at once and preserving as an image data. SOLUTION: By using a digital line camera capable of continuously and speedily photographing, a drum A for preserving radioactive waste is turned on a turn table 1 and the outside surface is indicated in spread state and is preserved in a computer 5 as one image data without a break on a sheet of paper.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum line appearance inspection apparatus for storing radioactive waste using a digital line camera.

[0002]

2. Description of the Related Art In a nuclear power plant, in order to inspect the soundness of a drum for storing radioactive waste (hereinafter simply referred to as a drum), a method of recording the appearance of the drum with a camera and recording the presence or absence of rust and flaws. Has been done. However, in the method of photographing with a video camera or a still camera, the entire surface of the drum can cannot be inspected and recorded continuously and simultaneously. Since the screen data is divided into a plurality of angles, a break occurs in the data of the inspection site, and data search and image analysis by a computer become complicated. In the case of visual inspection, there is a possibility that the human body may be exposed to the radioactive waste in the drum. In addition, there is a problem that individual differences occur in test results.

[0003]

(1) In a method of photographing the surface of a drum with a camera, an image on the surface of the drum can is displayed as a continuous image without a break, and the appearance of the entire peripheral surface of the drum can is displayed at a time. (2) to be able to save as image data, to make the material more objective than visual inspection,
(3) Higher resolution and higher resolution images can be obtained compared to shooting with a video camera, and data retrieval and image analysis by a computer can be facilitated. (4) The time required to approach the drum can is shorter than in visual inspection. And (5) simplifying the operation, facilitating the automation of the apparatus by a computer, and enabling labor saving of the work, and a method and apparatus for inspecting the appearance of a drum that can achieve the above points. The purpose is to provide.

[0004]

SUMMARY OF THE INVENTION A digital line camera capable of continuous high-speed photographing is used, while a drum can is being rotated, its external surface can be displayed in an expanded state, and one sheet of paper has no break. The image data can be stored in a computer as one image data. Place the drum A on the turntable 1 and place the drum A near the side trunk of the drum A.
An upper camera 7 for providing illumination 3 for irradiating from above and below from the side, and photographing the upper and lower surfaces of the drum A, respectively
And a bottom camera 8 for simultaneously photographing the upper and lower surfaces of the drum and the entire surface of the side trunk, which can be stored as digital data.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1 in FIG.
Is a turntable on which the drum A is mounted. The turntable 1 is rotated, and the surface of the drum can A is illuminated by the illumination 3 having the slit 3a from the side.
To shoot continuously. The line camera 2 reads the rotation angle of the turntable 1 and sequentially transfers image data scanned in the vertical direction to the computer 4.

The transferred image data is adjusted by the computer 4 into a continuous developed view of the side surface of the drum A and stored as digital data. The upper and lower surfaces of the drum A are photographed by the upper camera 7 and the lower camera 8, and are similarly stored as digital data. The stored image data is displayed on the computer monitor 5 or output to the printer 6 and used as data for visual inspection.

FIG. 2 shows an example of a waste appearance check sheet. Column 9 of the check sheet is a photograph of the top and bottom of drum A. The column indicated by reference numeral 10 on the check sheet is a continuous image obtained by scanning the side trunk of the drum A with the line camera 2. The top and bottom images of FIG. 2 and the continuous image of the side torso can be checked accurately by the inspector in a safe place without any cuts.

The column of reference numeral 11 on the check sheet is an entry column for the result of an inspector checking images of the upper and lower sides and the side trunk of the drum can. Thereby, the appearance inspection, the inspection of the fastening portion, the inspection of the description on the drum can surface, and the like can be checked in a safe place, and the result can be easily confirmed by a third party.

[0009]

According to the method and apparatus of the present invention, (1) In a method of photographing the surface of a drum with a camera,
Since the image of the surface of the drum can is displayed as a continuous image without a break, the appearance of the entire peripheral surface of the drum can can be checked at a time. (2) Since the data can be stored as image data, the object can be more objective than a visual inspection. (3) Since a high-precision and high-resolution image can be obtained as compared with shooting with a video camera, data retrieval and image analysis by a computer are facilitated. (4) The time required to approach the drum can is shorter than in the visual inspection, and the exposure can be reduced. (5) Since the operation is simple, automation of the apparatus by a computer is facilitated, and labor can be saved.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a drum appearance inspection apparatus of the present invention.

FIG. 2 is a diagram showing an example of a waste appearance check sheet.

[Explanation of symbols]

A drum can 1 turntable 2 line camera 3 lighting 3a slit 4 computer 5 (for computer) monitor 6 printer 7 top camera 8 bottom camera 9 check sheet

Claims (2)

[Claims] 1. A digital line camera capable of continuous high-speed photographing, while rotating a drum for storing radioactive waste, the outer surface of the drum can be displayed in an expanded state, and a cut is formed on one sheet of paper. A method for inspecting the appearance of a drum for storing radioactive waste by a digital line camera, wherein the image data can be stored in a computer as one image data having no image data. 2. A lighting device having a drum (A) placed on a turntable (1) and having a slit (3a) near the side trunk of the drum (A) for irradiating the drum (A) from above and below from the side. 3), and an upper camera (7) and a bottom camera (8) for photographing the upper and lower surfaces of the drum (A), respectively, and simultaneously photographing the upper and lower surfaces of the drum (A) and the entire surface of the side trunk,
An external appearance inspection device for a drum that stores radioactive waste by a digital line camera, which can be stored as digital data.