【作者】 姜学平； 程茜； 徐峥； 钱梦騄； 陈皓； 王鹏； 韩庆邦；

【Author】 JIANG Xue-ping;CHENG Qian;XU Zheng;QIAN Meng-lu;CHEN Hao;WANG Peng;HAN Qing-bang;College of IOT Engineering, Hohai University;School of Physics Science and Engineering, Tongji University;

【机构】 河海大学物联网工程学院； 同济大学声学研究所；

【摘要】 声透镜线聚焦超声换能器广泛应用于超声诊断和治疗中,需要了解其声场特性以确保使用的安全性和有效性。Schlieren法是可以用来研究透明媒质中的声场。本文将利用Schlieren法对常用的声透镜线聚焦换能器聚焦声场焦斑特性进行研究。采用有限元方法模拟了声透镜线聚焦换能器辐射声场的分布,与Schlieren成像结果对比,仿真结果和实验结果吻合,表明Schlieren法是研究线聚焦声场焦斑特性的一种非侵入式的有效手段。更多还原

【Abstract】 Acoustic lens line-focusing ultrasonic transducers has wide applications in medical ultrasound for both diagnostic and therapeutic purposes. The determination of the acoustic properties and quantitative measurement of acoustic pressure in focal area is needed to ensure the security during normal use. Schlieren method is an effective method to image and measure the sound field through the refractive index changes by the sound pressure in transparent medium. Ultrasonic pressure distribution emitted by the line-focus ultrasonic transducer is simulated using finite element method and imaged by Schlieren technique. That the experimental results were in accordance with simulation results shows that Schlieren method is an effective optical technique for line-focusing acoustic fields research.更多还原