声光偏折效应球壳型换能器聚焦焦点峰值声压的测量  

Measurement of peak pressure on the focusing acoustic field of spherical shell transducers based on acoustic optic deflection

作　　者：李伟东 许龙 王月兵 倪豪 

机构地区：[1]中国计量大学理学院,浙江杭州310018 [2]中国计量大学计量测试工程学院,浙江杭州310018

出　　处：《中国计量大学学报》2017年第3期269-273,292,共6页Journal of China University of Metrology

基　　金：国家自然科学基金资助项目(No.11574277;11474259);浙江省自然科学基金资助项目(No.LY16A040006);浙江新苗人才计划项目(No.2016R409058)

摘　　要：利用声光偏折效应,设计了一种测量球壳型换能器辐射聚焦声场焦点峰值声压的简便实验方法.基于焦点峰值声压与最大光偏折量之间的理论关系,通过测定聚焦声场焦域的最大光偏折量,获得球壳型聚焦换能器的焦点峰值声压;采用有限元方法对聚焦换能器辐射声场进行数值分析.对比实验测量结果,发现二者相对误差为7.33%,符合较好.该实验方法在医疗超声快速校准方面具有广泛的应用前景.A simple experimental method for measuring the peak pressure on the focusing acoustic field of spherical shell transducers was designed by using the acousto-optic deflection effect. Based on the theoretical model of peak pressure and the maximum light deflection, the peak pressure on the focusing sound field of the spherical shell transducer could be calculated by measuring the maximum light deflection. The COMSOL Multiphysics was used to simulate the radiated sound field of the focusing transducer. The results show that the relative error of the two methods is 7. 33%, which means that the theoretical calculation is in good agreement with the results obtained by COMSOL Multiphysies simulation. The experimental method has a wide application prospect in medical ultrasound rapid calibration.

关 键 词：聚焦声场 声光偏折 定量测量 

分 类 号：O422.2[理学—声学]