FIELD: measuring equipment.
SUBSTANCE: invention consists in fact that measurement point setting module sets arbitrary measurements point nearby section of welding inside steel material and includes reflecting surface, which comprises measurement point and parallel to direction of welding line. Computing module for controlling matrix probe transmits ultrasonic waves in form of shear wave meets arbitrary expression, and focuses in measurement point through matching medium at specified angle of incidence relative to virtual reflecting surface. Extraction of echo signal level module detects reflected waves transmitted ultrasonic waves at boundary between section of main metal and section of welding. Controller evaluates shape section welding on basis of reflected waves.
EFFECT: high reliability of evaluating quality of welding area in steel material.
8 cl, 26 dwg
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