Study on photoelastic imaging technology of ultrasonic guided wave in rails for high speed railway

Zhenzhong Fan; Lu Bai

doi:10.1117/12.2587468

12 March 2021 Study on photoelastic imaging technology of ultrasonic guided wave in rails for high speed railway

Zhenzhong Fan, Lu Bai

Proceedings Volume 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications; 117637Q (2021) https://doi.org/10.1117/12.2587468
Event: Seventh Symposium on Novel Photoelectronic Detection Technology and Application 2020, 2020, Kunming, China

Abstract

Ultrasonic guided wave inspection is considered to detect flaw effectively in rails for high-speed railway and simultaneously it can be used for SHM(structure health monitor). the propagation process of ultrasonic in the railway turnout is complex. In order to make the guided waves become visible and people can observe complicated Ultrasonic field directly, according to the Maxwell law of stress-optic refraction, polarized light interference method is employed for establishing the dynamic photoelastic imaging system, and the bottom of the switch rail and rail waist variable cross-section optical test block with K9 optical glass material are designed and produced. Choosing different probes, research of different probes to excite guided wave in the test block in the sound field is carried on. Using CCD shooting test block, guided wave sound field images through the computer software are taken for acquisition and analysis. The sound field visualization is implemented, which can be used to guide ultrasonic guided wave inspection in practice.

Citation Download Citation

Zhenzhong Fan and Lu Bai "Study on photoelastic imaging technology of ultrasonic guided wave in rails for high speed railway", Proc. SPIE 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications, 117637Q (12 March 2021); https://doi.org/10.1117/12.2587468

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