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指出焊缝超声波探伤中 ,超声场的扩散是导致实际缺陷定位失准的主要原因 ,并在实际探伤中得到验证。从理论上提出实际缺陷的真实位置确定法并导出了缺陷定位偏差的计算式。
It is pointed out that in the ultrasonic flaw detection, the diffusion of the ultrasonic field is the main reason leading to the misalignment of the actual flaw, which is verified in the actual flaw detection. The real position determination method of actual defects is put forward theoretically and the calculation formula of the position error of defects is derived.