Theoretical study on the acoustic field characteristics of a rectangular transducer for ultrasonic testing

Yun-fei Yue; Xiao-hu Mao; Liang Zhang

doi:10.1117/12.2580298

5 November 2020 Theoretical study on the acoustic field characteristics of a rectangular transducer for ultrasonic testing

Yun-fei Yue, Xiao-hu Mao, Liang Zhang

Author Affiliations +

Proceedings Volume 11568, AOPC 2020: Optics Ultra Precision Manufacturing and Testing; 115681X (2020) https://doi.org/10.1117/12.2580298
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China

Abstract

In aerospace, petroleum, special equipment and electric power industries, ultrasonic non-destructive testing technology is widely used. A large number of rectangular ultrasonic transducers are adopted, including the one dimensional linear phased array ultrasonic testing which is widely used, recently. So the sound field characteristics of the rectangular transducer is critical for these applications. Because of the small attenuation in the medium, we ignore the attenuation in the material. In this paper, the acoustic field characteristics of the rectangular transducer are discussed. Firstly, the coordinate system is established and the analytical solution of the acoustic field distribution of the rectangular transducer is derived in detail by using Rayleigh integral method with Fresnel approximation. Secondly, the distribution characteristics of sound pressure on the beam axis are discussed, and the length of the near field is calculated. Finally, the calculation of far-field sound pressure with the Fraunhofer approximation is carried out. And the relationship between directivity and probe parameters is discussed. The study of this paper provides important suggestions for the process design of ultrasonic inspection by using rectangular transducers.

Citation Download Citation

Yun-fei Yue, Xiao-hu Mao, and Liang Zhang "Theoretical study on the acoustic field characteristics of a rectangular transducer for ultrasonic testing", Proc. SPIE 11568, AOPC 2020: Optics Ultra Precision Manufacturing and Testing, 115681X (5 November 2020); https://doi.org/10.1117/12.2580298

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