超声换能器灵敏度标定的一种新方法—激光超声法  

A New Method for Calibrating Sensitivity of an Ultrasonic Transducer with Laser -generated Waves

作　　者：何存富[1] 周辛庚[1] 

机构地区：[1]北京工业大学,清华大学工程力学系

出　　处：《计量学报》1999年第1期65-69,共5页Acta Metrologica Sinica

基　　金：国家自然科学基金

摘　　要：本文提出一种利用脉冲激光产生可重复的宽带标准声源、对超声换能器的速度灵敏度进行标定的新方法—激光超声法。简述了激光脉冲产生声脉冲的原理，给出了换能器速度灵敏度的表示方法及标定原理。建立了整套标定装置，并给出了换能器的标定结果。结果表明，该方法可较好地标定换能器的速度灵敏度。A new method for calibration of velocity sensitivity of ultrasonic transducers with a wide band standard acoustic source generated by a pulsed laser is proposed. The mechanism of ultransonic waves induced by laser is simply presented, the experimental set-up of calibrating PZT transducers is built and the experimental results of calibrating velocity sensitivity on a commercial PZT transducer are demonstrated. The results show that this method is better feasible to do this.

关 键 词：超声换能器 灵敏度 标定 激光超声 

分 类 号：TH878.2[机械工程—仪器科学与技术]