Method and device for determining intersecting line scanning deflection angle for pipe welding

Abstract

The invention relates to a method and a device for determining an intersecting line scanning deflection angle for pipe welding. The device comprises an image information acquisition module for acquiring image information during intersecting line scanning, an AB image coordinate value acquisition module for acquiring a connecting line AB between two top angles, namely a point A and a point B, which are close to an intersecting line, of four top angles of an ultrasonic probe and two image coordinate values according to splash image information, a CD image coordinate value acquisition module for acquiring a connecting line CD between a point C and a point D and two image coordinate values according to edge line image information and the splash image information, and a deflection angle acquisition module for acquiring an included angle of the connecting line CD and the connecting line AB according to the image coordinate values. According to the method and the device for determining the intersecting line scanning deflection angle for pipe welding, the deflection angle of the probe and the deflection angle of the edge line of the intersecting line are acquired according to the image coordinate values; a difference value of the two deflection angles is the real-time determined intersecting line scanning deflection angle, and the reliability of an ultrasonic flaw detection result is improved.

Description

technical field [0001] The invention relates to the technical field of ultrasonic flaw detection, in particular to a method and a device for determining the deflection angle of intersecting lines for pipe welding. Background technique [0002] As we all know, the flaw detection of intersecting line welds of pipe fittings has always been the most difficult part in the ultrasonic flaw detection process. The weld cross section of the intersecting line weld of pipe fittings is different in each place. The width and relative depth of the weld will change at any time with the change of position, and in order to keep the ultrasonic beam perpendicular to the weld at the current position at each flaw detection position , it is necessary to adjust the appropriate probe detection angle at any time. In addition, different cross-sections at different positions, relative depths, multiple wave reflections, etc. will cause great difficulties in the positioning of weld defects in intersecti...

AI Technical Summary

Problems solved by technology

In addition, different cross-sections at different positions, relative depths, multiple wave reflections, etc. will cause great difficulties in locating weld defects in pipe fittings intersecting lines

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