NDE APPLICATION OF AIR-COUPLED TRANSDUCER FOR SURFACE CRACK DETECTION

被引：0
|
作者：
Wang, Xiao-yu [1 ]
Li, Cong-cong [1 ]
Wu, Hao-dong [1 ]
Zhang, De [1 ]
Zhang, Xiao-dong [2 ]
Gong, Xun [1 ]
机构：
[1] Nanjing Univ, Inst Acoust, Key Lab Modern Acoust, Minist Educ, Nanjing 210093, Jiangsu, Peoples R China
[2] Suzhou Univ Sci & Technol, Sch Elect & Informat Engn, Suzhou 215009, Peoples R China
来源：
PROCEEDINGS OF THE 2019 13TH SYMPOSIUM ON PIEZOELECTRICITY, ACOUSTIC WAVES AND DEVICE APPLICATIONS (SPAWDA) | 2019年
关键词：
Air-coupled; 1-3 type piezoelectric composites; Double matching layers structure; Surface cracks;
D O I：
10.1109/spawda.2019.8681869
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
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.
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页数：4
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