基于声光偏转效应的液体临界剧烈空化声压的检测  

Measurement of the Critical Intense Cavitation Pressure Based on the Acousto-Optical Refraction Effect in Liquid

作　　者：吕朋[1,2] 周圆[1,2] 宋珂[1,2] 王华[1,2] 沈勇[1,2] 

机构地区：[1]重庆医科大学生物医学工程学院,省部共建超声医学工程国家重点实验室,超声医学工程重庆市市级重点实验室,重庆400016 [2]超声医疗国家工程研究中心,重庆401121

出　　处：《中国激光》2013年第4期160-165,共6页Chinese Journal of Lasers

基　　金：国家重大仪器专项(81127901)资助课题

摘　　要：为检测液体中发生剧烈空化时的临界声压的大小,提出了一种基于声光偏转效应对临界剧烈空化声压进行检测的方法。根据远场光斑分布的时间变化规律确定剧烈空化的发生,通过光线最大偏转距离与焦点峰值声压的关系,可非介入地检测临界剧烈空化声压值,重复性高。通过分析液体中气泡分布及变化规律,以及空化阈值声压随外界环境压强的变化规律对测量结果进行标定,证实了该方法检测临界剧烈空化声压的可行性。To measure the critical pressure when intense cavitation occurred in liquid, a method to detect the critical intense cavitation pressure which based on the acousto-optical refraction effect is proposed. According to the distribution of the far-field spot which changes with time to determine the occurrence of intense cavitation, it can detect the value of the critical intense cavitation pressure non-invasively by the relation between the maximum deflection distance of the ray and the change of the focus acoustic pressure with a high repeatability. By analysing the distribution of the cavitation bubbles in liquid , and the cavitation threshold pressure changing with the external environmental pressure to calibrate the results, it＇s proved that the feasibility of this way to detect the critical intense cavitation pressure.

关 键 词：几何光学 临界剧烈空化声压 声光偏转效应 聚焦超声 

分 类 号：O435.1[机械工程—光学工程] O426.3[理学—光学]