Application of multi-channel photoelastic imaging technology in array type ultrasonic nondestructive testing

Zhen-zhong Fan; Chao Bi

doi:10.1117/12.2185783

7 August 2015 Application of multi-channel photoelastic imaging technology in array type ultrasonic nondestructive testing

Zhen-zhong Fan, Chao Bi

Author Affiliations +

Proceedings Volume 9623, 2015 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems; 96230K (2015) https://doi.org/10.1117/12.2185783
Event: International Conference on Optical Instruments and Technology 2015, 2015, Beijing, China

Abstract

With the rapid development of modern nondestructive testing technologies, ultrasonic phased array and Ultrasonic array testing technology has been used widely, at the same time the propagation process of ultrasonic in the material becomes more and more complex. In order to make the ultrasonic propagation path become visible and researchers can observe the acoustic field directly, considering the properties of the ultrasonic as a stress wave, according to the theory of polarized light interference, a multi-channel dynamic photoelastic imaging system is developed successfully. The system can generate many kinds of focusing ultrasonic fields in optical specimen by controlling the ultrasonic transmission delay time of each equipment channel, and the system has the ability to simulate the acoustic field’s focusing process of the ultrasonic phased array. The image shot by CCD camera reflects the propagation process of the acoustic field in the specimen, and the dynamic video is formed under control of the timing circuit, and the system has the ability to save the captured image in the computer.

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Zhen-zhong Fan and Chao Bi "Application of multi-channel photoelastic imaging technology in array type ultrasonic nondestructive testing", Proc. SPIE 9623, 2015 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 96230K (7 August 2015); https://doi.org/10.1117/12.2185783

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KEYWORDS

Ultrasonics

Photoelasticity

Acoustics

Imaging systems

Control systems

Phased arrays

Glasses

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