Sagnac干涉仪在散射超声场表征中的应用

1997 IEEE Ultrasonics Symposium Proceedings. An International Symposium (Cat. No.97CH36118) Pub Date : 1997-10-05 DOI:10.1109/ULTSYM.1997.663095

P. Fomitchov, A. Kromine, S. Krishnaswamy, J. Achenbach

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引用次数: 1

摘要

了解超声光束的时空参数，以及这些光束与小缺陷相互作用的细节是有效地将超声技术应用于无损评估(NDE)所必需的。本文采用光纤Sagnac干涉仪来表征由传统压电换能器(PZT)和激光超声源产生的声场，以及这种超声场在缺陷下的散射。该干涉仪的高空间分辨率及其提供绝对超声位移的能力使该设备非常适合:(i) PZT换能器或激光源产生的超声光束的分析和校准，以及(ii)由缺陷散射的超声场的精确测量。

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Application of a Sagnac interferometer for the characterization of scattered ultrasonic fields

Knowledge of the spatial and temporal parameters of ultrasonic beams, as well as details of interaction of such beams with small defects is necessary for effective application of ultrasonic techniques to nondestructive evaluation (NDE). The work presented here employs a fiber-optic Sagnac interferometer to characterize acoustical fields generated by conventional piezoelectric transducers (PZT) and a laser ultrasonic source, and the scattering of such ultrasonic fields by flaws. The high spatial resolution of this interferometer and its ability to provide absolute ultrasonic displacements make this device very suitable for: (i) profiling and calibration of ultrasonic beams generated by PZT transducers or laser sources, and (ii) precision measurement of ultrasonic fields scattered by flaws.

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来源期刊

1997 IEEE Ultrasonics Symposium Proceedings. An International Symposium (Cat. No.97CH36118)

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