超声波是一种机械振动在媒质中的传播过程,其频率一般在20kHz以上。超声波的应用很广泛,主要是两大类,一是利用较弱的超声波进行种物理、化学参数的测量和检验,如超声探伤、超声检漏、超声测距等。二是利用高强度的超声波改变物质的性质和状态,如超声钻孔、超声清、超声焊接、 Ultrasound is a mechanical vibration in the medium of the spread of the process, the frequency is generally above 20kHz. The application of ultrasound is very broad, mainly two categories, one is the use of weak ultrasonic physical species, chemical parameters of the measurement and testing, such as ultrasonic flaw detection, ultrasonic leak detection, ultrasonic ranging and so on. The second is the use of high-intensity ultrasound to change the nature of the material and the state, such as ultrasonic drilling, ultrasonic cleaning, ultrasonic welding,