Page 102 - 《应用声学》2023年第3期
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第 42 卷 第 3 期                                                                       Vol. 42, No. 3
             2023 年 5 月                          Journal of Applied Acoustics                      May, 2023

             ⋄ 研究报告 ⋄



                                 超声换能器辐射特性的优化                                         ∗




                       张雪晴     1   尹冠军      1,2†   张家裕     1   冉建清      1    杨雪冰     1    郭建中     1



                                         (1 陕西师范大学物理学与信息技术学院           西安   710119)
                                      (2 陕西师范大学现代教学技术教育部重点实验室             西安   710119)
                摘要:匹配层和背衬层是换能器的重要组成部分,对换能器特性有重要影响。针对发射型换能器,基于有/无
                匹配层和空气/树脂背衬两种条件组合,该文研究了匹配层与背衬层对换能器辐射特性的影响。结果表明,负
                载材料为水时,空气背衬换能器相较于树脂背衬换能器声能辐射效率更高;匹配层可以提高换能器的主瓣能
                量,抑制旁瓣能量及旁瓣数量。因此,针对发射型换能器的设计,背衬材料的选择应遵循与压电材料的阻抗差
                异越大越优的原则;匹配层的合理设计不仅可以提高超声换能器的声能辐射效率,还可以提高主瓣旁瓣峰值
                比,使声能更集中。
                关键词:换能器;匹配层;背衬材料
                中图法分类号: O426           文献标识码: A          文章编号: 1000-310X(2023)03-0540-08
                DOI: 10.11684/j.issn.1000-310X.2023.03.012





                      Optimization of radiation characteristics of ultrasonic transducer

                           ZHANG Xueqing   1  YIN Guanjun 1,2   ZHANG Jiayu  1  RAN Jianqing  1
                                            YANG Xuebing  1   GUO Jianzhong  1

                       (1 College of Physics and Information Technology, Shaanxi Normal University, Xi’an 710119, China)
             (2 Key Laboratory of Modern Teaching Technology of Ministry of Education, Shaanxi Normal University, Xi’an 710119, China)

                 Abstract: The matching layer and backing layer are important components of the transducer, which have
                 important influence on the characteristics of the transducer. In this paper, the effects of matching layer and
                 backing layer on radiation characteristics of transmitting transducer are studied based on the combination
                 of two conditions: with/without matching layer and with air/resin backing layer. The results show that the
                 acoustic radiation efficiency of air backed transducer is higher than that of resin backed transducer when the
                 load material is water. The matching layer can improve the main lobe energy of the transducer and inhibit
                 the side lobe energy and the number of side lobes. Therefore, for the design of transmitting transducers,
                 the selection of backing materials should follow the principle of the greater the impedance difference between
                 piezoelectric materials and the better. The rational design of matching layer can not only improve the radiation
                 efficiency of ultrasonic transducer, but also improve the peak ratio of main lobe and side lobe, so that the sound
                 energy is more concentrated.
                 Keywords: Transducer; Matching layer; Backing material


             2022-01-13 收稿; 2022-03-28 定稿
             国家自然科学基金项目 (11727813, 12004237, 12034005), 中国博士后科学基金项目 (2020M683416), 陕西省科学技术协会青年人才
             ∗
             托举计划项目 (20220523)
             作者简介: 张雪晴 (1996– ), 女, 黑龙江鹤岗人, 硕士研究生, 研究方向: 医学超声。
             † 通信作者 E-mail: yinchamp@snnu.edu.cn
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