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第 42 卷 第 1 期                                                                       Vol. 42, No. 1
             2023 年 1 月                          Journal of Applied Acoustics                   January, 2023

             ⋄ 研究报告 ⋄



                 球壳换能器电声效率测量方法及声场特性分析





                                陈锦灵     1   王月兵      1†  赵 鹏     1   邢广振     2   李荣基     1



                                           (1 中国计量大学计量测试工程学院         杭州   310018)
                                               (2 中国计量科学研究院      北京   102200)

                摘要：在高强度聚焦超声治疗系统中，换能器的电声效率是治疗剂量控制中的重要参数，其在焦域附近的声场
                分布同样重要。该研究以球壳聚焦换能器为研究对象，基于辐射力天平法与平面扫描法进行输出声功率的测
                量，同时测量其激励电功率后计算得到电声效率，并就其声场特性分布以及存在的非线性传播现象进行了简
                单阐述。两种测量方法测得的电声效率在声学计量的误差允许范围内，实验结果表明两种方法在测量球壳聚
                焦换能器输出声功率时具备较好的一致性。
                关键词：球壳聚焦换能器；电声效率；辐射力天平法；平面扫描法；声场特性
                中图法分类号: TB95           文献标识码: A          文章编号: 1000-310X(2023)01-0138-07
                DOI: 10.11684/j.issn.1000-310X.2023.01.018






                   The measurement method of electroacoustic efficiency of spherical shell
                               transducer and character analysis for acoustic field



                      CHEN Jinling 1  WANG Yuebing   1  ZHAO Peng  1  XING Guangzhen   2  LI Rongji 1


                      (1 College of Metrology & Measurement Engineering, China Jiliang University, Hangzhou 310018, China)
                                       (2 National Institute of Metrology, Beijing 102200, China)

                 Abstract: In the high intensity focused ultrasound treatment system, the electroacoustic efficiency of the
                 transducer is an important parameter in the treatment dose control, and its sound field distribution near the
                 focal region is also important. In this study, the 1.12 MHz spherical shell focused transducer is taken as the
                 research object. The output acoustic power is measured based on the radiation force balance method and
                 the plane scanning method. At the same time, the electroacoustic efficiency is calculated after measuring the
                 excitation electric power, and its sound field characteristic distribution and nonlinear propagation phenomenon
                 are briefly described. The electroacoustic efficiency measured by the two methods is within the allowable error
                 range of acoustic measurement. The experimental results show that the two methods have good consistency in
                 measuring the output acoustic power of spherical shell focusing transducer.
                 Keywords: Spherical shell focused transducer; Electroacoustic efficiency; Radiation force balance; Planar
                 scanning technique; Sound field characteristic


             2021-11-30 收稿; 2022-01-18 定稿
             作者简介: 陈锦灵 (1998– ), 男, 浙江宁波人, 硕士研究生, 研究方向: HIFU 辐照下生物组织声参数测量及声场参数测量。
             † 通信作者 E-mail: wyb_1963@163.com
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