超声波透过物体时,物体内部如有空隙、裂纹等缺陷,便可无损伤地探查出来。这是因为探头发出的超声波碰到两种不同物质组成的界面时,有一部分便要反射掉,特别是当物体里有空隙时反射率更大,这样通过接收探头所接收信号的强弱,便可评价物体材料的质量,这就是无损探伤。目前使用的超声波探伤仪具有小型、轻便、价廉等优点,但其信号用波形显示,要通过 Ultrasound through the object, the object if any internal gaps, cracks and other defects, can be unequipped to explore out. This is because the ultrasonic waves emitted by the probe encounter some interfaces made up of two different materials and some of them must be reflected off. In particular, when there is a void in the object, the reflectivity is greater, so the strength of the signal received by the receiving probe The quality of the material can be evaluated, which is non-destructive testing. Currently used ultrasonic flaw detector with small, lightweight, inexpensive, etc., but the signal waveform display, to pass