Three-dimensional detection method for defects of sealing surface

Abstract

The invention discloses a three-dimensional detection method for the defects of a sealing surface. The three-dimensional detection method comprises the following steps: obtaining pictures with scratches on the sealing surface; obtaining the length and the initial width of each scratch according to the pictures with the scratches; determining a scanning route according to the initial width; planning a scanning track according to the scanning route; and scanning the scratches along the scanning track, thus determining the depth and the final width of each scratch. Compared with the prior art, the three-dimensional detection method for the defects of the sealing surface has the advantages that the pictures with the scratches on the sealing surface are obtained so as to avoid a leak detection condition of the small scratches; then the length and the initial width of each scratch are obtained according to the pictures, the scanning route is determined according to the initial width, the scanning track is further planted according to the scanning route, and finally, the scratches are scanned along the scanning track so as to determine the depth and the final width of each scratch, so as to realize the three-dimensional detection of the defects of the sealing surface. Meanwhile, the measurement precision is improved and the size quantification detection on the three-dimensional defects of the sealing surface is realized.

Description

technical field [0001] The invention relates to the technical field of defect detection, and in particular to a three-dimensional detection method for sealing surface defects. Background technique [0002] At present, when performing three-dimensional defect detection on the sealing surface, two methods are mainly used: visual inspection and online video observation. However, the two methods have the following defects: (1) The detection results of the visual inspection method are easily affected by the subjective judgment of the operator, thereby affecting the measurement accuracy; (2) The online video observation method is easy to miss fine scratches; (3) The above two This detection method can only realize the qualitative judgment of the sealing surface defect, but cannot quantify the size of the defect. [0003] In addition, a large number of equipment in modern nuclear power plants need grinding and polishing during maintenance, especially equipment with high sealing re...

AI Technical Summary

Problems solved by technology

However, the two methods have the following defects: (1) The detection results of the visual inspection method are easily affected by the subjective judgment of the operator, thereby affecting the measurement accuracy; (2) The online video observation method is easy to miss fine scratches; (3) The above two This detection method can only realize the qualitative judgment of the sealing surface defect, but cannot quantify the size of the defect

If the above detection method is used to perform three-dimensional detection of defects on the sealing surface of the pressure vessel, the radiation dose of the operator will be seriously increased.

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