It is often misjudged the flawecho in ultrasonic examination that the echo signals produced by sound field property and geometrical shape of the component examined according to sound field theory.
超声探伤中，由于声场特性、件几何形状的影响，所产生的各种回波信号常常被误判为缺陷信号。
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The component analysis is carried out by evaluating the flaw indications between the interface echo at sound entry and the indications from the geometry, such as edges – openings – holes.
The principle of detector is that the A-Scan flaw instrument of USL32 beams the ultrasonic to detect the bar material with the method of pulse echo once.