红外热成像在聚焦换能器焦平面测量中的应用  

Application of Infrared Thermography in Measuring the Focal Plane of a Focused Ultrasound Transducer

作　　者：赵薇 曹慧媛 吴燕琪 陶洁 于亚萍 ZHAO Wei;CAO Huiyuan;WU Yanqi;TAO Jie;YU Yaping(College of Metrology&Measurement Engineering,China Jiliang University,Hangzhou 310018,China)

机构地区：[1]中国计量大学计量测试与仪器学院,杭州310018

出　　处：《计量科学与技术》2024年第10期73-78,72,共7页Metrology Science and Technology

基　　金：浙江省重点研发计划(2022C01002)。

摘　　要：为了更好地研究聚焦超声换能器的声场特性,提出了一种利用红外热成像技术测量聚焦换能器焦域尺寸的方法。通过在换能器焦平面上放置薄膜型吸声材料,使用红外热成像仪测量超声功率作用下焦平面上的温度分布来确定焦域尺寸。使用水听器扫描法对相同的聚焦换能器进行了测量,并对聚焦换能器的声场分布进行了理论分析,结果显示-6dB波束宽度的不一致性在5%以内,验证了利用红外热成像技术测量聚焦超声换能器声场分布的可行性。To better study the acoustic field characteristics of focused ultrasound transducers,this paper proposes a method for measuring the focal region size using infrared thermal imaging technology.By placing a thin-film sound-absorbing material on the focal plane of the transducer and measuring the temperature distribution under ultrasonic power using an infrared thermal imager,the focal size is determined.Additionally,the hydrophone scanning method was used to measure the same focused transducer,and a theoretical analysis of the sound field distribution was conducted.The results showed that the discrepancy in the-6 dB beam width was within 5%,verifying the feasibility of using infrared thermal imaging to measure the sound field distribution of focused ultrasound transducers.

关 键 词：计量学 聚焦超声 红外热成像 声热模型 水听器 声场测量 

分 类 号：TB95[一般工业技术—计量学]