NDE APPLICATION OF AIR-COUPLED TRANSDUCER FOR SURFACE CRACK DETECTION

摘要：

　　According to the technical difficulties of the air-coupled piezoelectric ultrasonic transducer, 1-3 type piezoelectric composites and double matching layers structure are adopted in order to solve the acoustic impedance mismatch at the interface between the piezoelectric materials and air.The optimal design of the matching layer thickness for double matching layers structure air-coupled ultrasonic transducer is also completed through experiments.Based on this, 440 kHz flat-plate and focused air-coupled piezoelectric ultrasonic transducer are designed, fabricated and characterized.Finally,surface cracks are detected using the focused air-coupled piezoelectric ultrasonic transducer.

关键词： Air-coupled 1-3 type piezoelectric composites Double matching layers structure Surface cracks

作者: Xiao-yu WANG Cong-cong LI Hao-dong WU De ZHANG Xiao-dong ZHANG Xun GONG

作者单位: Key Laboratory of Modern Acoustics, Ministry of Education, Institute of Acoustics, Nanjing Universit School of Electronic & Information Engineering, Suzhou University of Science and Technology, Suzhou

会议类型: 国际会议

会议名称: The 2019 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2019(第13届)全国压电和声波理论及器件技术研讨会)

会议地点: 哈尔滨

会议语种:英文

页码: 411-414

在线出版日期: 2019-01-11（万方平台首次上网日期，不代表论文的发表时间）