超聲波清洗機原理主要是將換能器，將功率超聲頻源的聲能，并且要轉換成機械振動，通過清洗槽壁使之將槽子中的清洗液輻射到超聲波。由于受到輻射的超聲波，使之槽內液體中的微氣泡能夠在聲波的作用下從而保持振動。

The principle of ultrasonic cleaning machine is to convert the ultrasonic energy of transducer and power ultrasonic frequency source into mechanical vibration, and make the cleaning solution in the tank radiate to ultrasonic through cleaning the tank wall. Because of the ultrasonic radiation, the microbubbles in the liquid in the tank can keep vibration under the action of acoustic wave.

當聲壓或者聲強受到壓力到達一定程度時候，氣泡就會迅速膨脹，然后又突然閉合。在這段過程中，氣泡閉合的瞬間產生沖擊波，使氣泡周圍產生1012-1013pa的壓力及局調溫，這種超聲波空化所產生的巨大壓力能破壞不溶性污物而使他們分化于溶液中，蒸汽型空化對污垢的直接反復沖擊。

When the sound pressure or sound intensity reaches a certain level, the bubble will expand rapidly and then close suddenly. In this process, shock wave is generated at the moment of bubble closure, which makes 1012-1013 PA pressure and local temperature around the bubble. The huge pressure generated by ultrasonic cavitation can destroy insoluble pollutants and make them differentiate into solution. The direct counter impact of steam cavitation on the fouling.

超聲波是一種振動頻率高于聲波的機械波，由換能晶片在電壓的激勵下發生振動產生的，它具有頻率高、波長短、繞射現象小，特別是方向性好、能夠成為射線而定向傳播等特點。

Ultrasonic wave is a kind of mechanical wave whose vibration frequency is higher than that of sound wave. It is generated by the vibration of transducer chip under the excitation of voltage. It has the characteristics of high frequency, short wavelength, small diffraction phenomenon, especially good directivity, and can become a ray and propagate directionally.

超聲波對液體、固體的穿透本領很大，尤其是在陽光不透明的固體中，它可穿透幾十米的深度。超聲波碰到雜質或分界面會產生顯著反射形成反射成回波，碰到活動物體能產生多普勒效應。因此超聲波檢測廣泛應用在工業、國防、生物醫學等方面。

Ultrasonic has great penetration ability to liquid and solid, especially in the opaque solid of sunlight, it can penetrate tens of meters deep. When the ultrasonic wave touches the impurity or interface, it will produce significant reflection and echo. When it touches the moving object, it will produce Doppler effect. Therefore, ultrasonic testing is widely used in industry, national defense, biomedicine and other aspects.