A detection method for tky tube nodes using phased array

Abstract

The invention discloses a method for detecting TKY pipe nodes by using a phased array, which comprises the steps of: step 1 cleaning the detection area of ​​the TKY pipe node to be detected; Mark the starting point and scanning direction; and draw a reference line on the scanning surface; step 3 smear coupling agent on the scanning surface; The node is detected; the coupling monitoring is turned on during the detection; step 5 displays the scanned data; step 6 evaluates the collected data and determines its validity. The invention detects the weld joint and draws the outline of the phased array probe and the sound beam line of the ultrasonic beam according to the size to realize the visualization effect of the sound beam coverage of the weld joint, which is helpful for the evaluation of the blind area of ​​the ultrasonic detection of the TKY pipe joint weld, thereby overcoming the relative Blindness in the setting of control array ultrasonic testing parameters.

Description

technical field [0001] The invention relates to the field of marine engineering detection, in particular to a detection method using a phased array TKY pipe node. Background technique [0002] TKY tube joints are the most important and common structural forms in space steel mesh structures. In the production process of ships, ocean engineering, bridges, steel structures and other industries, it is often necessary to use non-destructive testing methods to test their surfaces and interiors. That is to say, it uses the changes in the reaction to heat, sound, light, electricity, and magnetism caused by the abnormality or defect of the internal structure of the material to evaluate the abnormality and defect of the structure and the degree of harm. [0003] At present, the shear wave oblique probe is mainly used for the detection of pipe joint welds. Due to the single refraction angle of the sound beam, the primary and secondary sound waves cannot cover the welded joint area well...

AI Technical Summary

Problems solved by technology

[0003] At present, the shear wave oblique probe is mainly used for the detection of pipe joint welds. Due to the single refraction angle of the sound beam, the primary and secondary sound waves cannot cover the welded joint area well, resulting in a large detection blind area. Different pipe joint welds The size of its blind zone cannot be effectively evaluated

In addition, conventional ultrasonic testing has been widely used in the field of marine engineering to detect internal defects of structures. The severity of defects can be judged by the A display provided by pulse reflection for internal defects of structures. , the detection surface, that is, the outer wall of the main branch pipe is a spatial geometric surface, the weld cross section, the dihedral angle and the groove angle are continuously changing, and the root gaps at different positions are also different. The characteristics have brought many technical problems to ultrasonic testing, among which the positioning of defects is the most complicated, and ultrasonic testing has problems such as difficult identification of reflected waves, complex defect positioning methods, cumbersome selection of probe refraction angles, and large defect equivalent errors, resulting in low positioning efficiency