介绍了压电超声换能器的基本结构及振动模态 ,利用先进的激光多普勒干涉仪对自制换能器的谐振特性以及振动速度和位移分布进行了测量和分析 ,并与有限元分析的结果进行了对比。实验表明 :实验测量模态结果与有限元分析结果基本相符。激光多普勒干涉技术是一种直观研究压电超声换能器振动的有效手段。通过有限元分析和先进测量手段的结合与对比 ,对换能器的设计和制作具有指导意义。 The basic structure and vibration modes of the piezoelectric ultrasonic transducer are introduced. The resonance characteristics, vibration velocity and displacement distribution of the self-made transducer are measured and analyzed by the advanced laser Doppler interferometer, and compared with the finite element analysis The results were compared. Experiments show that the results of experimental measurement basically agree with the results of finite element analysis. Laser Doppler interferometry is an effective method to study the vibration of piezoelectric ultrasonic transducers. Through the combination of finite element analysis and advanced measurement methods, it is instructive to design and manufacture the transducer.