The vibration mode of the radiation surface of transducer (or structure of supersaturated cavitation cloud in thin liquid) is investigated experimentally by high-speed photography. The classification of saturated, supersaturated and undersaturated cavitation clouds was proposed, and a comparison was made between saturated and supersaturated cavitation cloud structures in liquid thin layers. The characteristics and formation mechanism of supersaturated cavitation cloud structure were investigated. Based on the close correspondence and rapid response between the distribution of supersaturated cavitation clouds and vibration modes of radiation surface, a new approach is proposed to measure the vibration mode of transducer operating at high power and large amplitude in real time.

中文翻译：

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过饱和空化云高速成像及高功率换能器辐射面振动模式

通过高速摄影对换能器辐射面的振动模式（或稀薄液体中过饱和空化云的结构）进行了实验研究。提出了饱和、过饱和和欠饱和空化云的分类，并对液体薄层中饱和和过饱和空化云的结构进行了比较。研究了过饱和空化云结构的特征及其形成机制。基于过饱和空化云分布与辐射面振型的紧密对应和快速响应，提出了一种实时测量高功率、大振幅换能器振型的新方法。