空耦超声波换能器中酰胺化改性声匹配层的制备与性能检测  

Preparation and performance testing of amidation modified acoustic matching layer for air coupling ultrasonic transducer

作　　者：韩思奇 康洋 邵欣 HAN Siqi;KANG Yang;SHAO Xin(Intelligent Manufacturing College,Tianjin Sino-German University of Applied Sciences,Tianjin 300350,China)

机构地区：[1]天津中德应用技术大学智能制造学院,天津300350

出　　处：《复合材料学报》2024年第5期2455-2464,共10页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(62073240);天津市教委科研计划项目(2020KJ087);山东省科技型中小企业创新能力提升工程(2022TSGC2331)。

摘　　要：基于空心玻璃微珠(HGM)/环氧树脂体系的声匹配层制备了高灵敏度的空耦超声波换能器。采用聚甲基乙烯基醚-马来酸酐共聚物(PVMMA)接枝到空心玻璃微珠表面(PVMMA-g-HGM),以提高低密度空心玻璃微珠在高密度环氧树脂基体中的分散性。结果表明:改性空心玻璃微珠/环氧树脂复合材料的致密度提升显著且无明显缺陷,具备了更好的声辐射性能,制备的空耦超声波换能器灵敏度达到4.88 V。此外,改进后超声波换能器装配的气体超声波流量计具备更好的流场适应性,相对误差绝对值低于1.0%。本文提出一种新的工艺以改进气体超声波流量计中超声换能器的性能。A high-sensitivity air-coupled ultrasonic transducer with an acoustic matching layer based on epoxy resin/hollow glass microsphere(HGM)is investigated.In order to improve the dispersion of low-density HGM in high-density epoxy resin matrix,poly(methyl vinyl ether-alt-maleic anhydride)(PVMMA)was grafted onto the HGM surface(PVMMA-g-HGM).The morphology and surface chemical characteristics of modified HGM and HGM/epoxy resin composite were analyzed.An air-coupled ultrasonic transducer was fabricated with the improved matching layer,which achieved a peak-to-peak voltage of 4.88 V.In addition,the gas ultrasonic flow-meter equipped with the improved ultrasonic transducer had better flow field adaptability,and the relative error was less than 1.0%.This work is to propose a new technology to improve the performance of ultrasonic transducer in gas ultrasonic flowmeter.

关 键 词：空心玻璃微珠 空耦超声波换能器 声匹配层 酰胺化改性 气体超声波流量计 

分 类 号：TB332[一般工业技术—材料科学与工程]