Method for extracting and recognizing nondestructive detecting defect based on radial damping energy field

A technology of attenuating energy and non-destructive testing, which is applied in material analysis, image data processing, and instruments using radiation, and can solve the problems of seldom considering the gray distribution of internal regions of defects, waste of valuable information, etc.
CN101201329AInactive Publication Date: 2008-06-18XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
XI AN JIAOTONG UNIV
Publication Date
2008-06-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a nondestructive examination defect extraction and recognition method based on the ray attenuation energy field. Firstly, the relation between the negative image gray scale and the attenuation capacity field distribution is established based on ray detection and digital imaging; the defect boundary is acquired from the radiograph images; the types of the defects acquired by using the defect extraction method are recognized based on the ray attenuation energy field; finally, the defects acquired by using the recognition method of types of defects are volume measured according to the energy attenuation theory. The invention makes use of the attenuation characteristics expressed by the ray energy when the ray energy penetrates different materials to establish the principle of correspondence of the ray energy attenuation characteristics and the negative image gray scale, and makes use of the advantage of computers that the gray-scale image resolution of the computer outclasses that of human eyes, thus achieving automatic extraction, recognition and three-dimensional volume measurement of defects of components and parts of products.
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Description

technical field

[0001] The invention relates to a non-destructive detection defect extraction and identification method based on ray attenuation energy field in digital image processing. Background technique

[0002] Defect determination using industrial radiographic film images mainly includes two aspects: defect boundary extraction and defect type identification. Due to the diversity and complexity of the internal defects of parts, at present, most of the defect type identification is mainly based on the image film formed by the defect, and the judgment is based on the actual experience of professionals, resulting in a large workload for non-destructive testing technicians. The work intensity is high, and misjudgments and omissions occur from time to time. In addition, the non-destructive ray testing industry involves flaw detection technology, casting technology, material forming technology, welding technology and surface treatment technology. It takes about three years ...

Claims

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