Measurement of three-dimensional sound field with the layered scanning method based on EMAT

被引：0

作者：

Zheng Y. ^{[1
]}

Li Z. ^{[1
,2
]}

Li C. ^{[1
,2
]}

Zhang Z. ^{[1
]}

Zhou J. ^{[2
]}

机构：

[1] China Special Equipment Inspection and Research Institute, Beijing

[2] School of Mechanical Engineering, North University of China, Taiyuan

来源：

Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument | 2019年 / 40卷 / 12期

关键词：

3D acoustic field; Acoustic field measurement; Electromagnetic acoustic transducers; Layered scanning; Non-destructive testing;

D O I：

10.19650/j.cnki.cjsi.J1905606

中图分类号：

学科分类号：

摘要：

Acoustic field distribution characteristics of electromagnetic acoustic transducers (EMAT) are different. To ensure the effectiveness of detection, it is necessary to accurately measure the acoustic field distribution. For measuring the distribution of ultrasonic shear wave radiation sound field in solid metal materials, the pin-type EMAT is used as a transducer. The method of measuring and reconstructing three-dimensional radiation sound field based on tomography is studied. In further, a three-dimensional sound field tomography measurement experiment system is established. The errors of the measurement system are analyzed, and a compensation method is proposed. During implementing experiments, the radiation sound field distribution of the toroidal coil EMAT at the excitation frequency of 3.5 MHz is measured. Its three-dimensional radiation sound field in aluminum and low carbon steel is obtained, and its near field distance is approximately 8 mm. Experimental results show that this method can effectively provide the sound field distribution of ultrasonic shear waves at different depth sections in solid metal materials. By superimposing them, the three-dimensional radiation distribution of EMAT in the solid can be achieved. © 2019, Science Press. All right reserved.

引用

页码：9 / 18

页数：9

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