Strain-rate sensor based on in-fiber Doppler velocimetry

Yu-Lung Lo; James S. Sirkis

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Strain-rate sensor based on in-fiber Doppler velocimetry

机译：Strain-rate sensor based on in-fiber Doppler velocimetry

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An optical fiber strain-rate sensor based on in-line Doppler velocimetry is developed using a 3 × 3 coupler with a large path imbalance Mach-Zehnder interferometer for passive demodulation of Doppler wavelength shifts. A model is developed that relates the strain rate in an optical fiber to the corresponding Doppler wavelength shifts. The strain rate obtained by differentiating strain from a Michelson strain sensor mounted on the piezoelectric transistor (PZT) cylinder shows good agreement with the strain rate directly obtained from the Doppler-based strain-rate sensor. The Doppler-based strain-rate sensor is also bonded to a Hopkinson pressure bar in an attempt to detect the stress waves propagation. It is shown that the higher the strain rate of stress wave,the easier it is to couple into the lead-in/but fiber.#1998 Society fo Photo-Optical Instrumentation Engineers. S0091-3286(98)01705-X Subject terms: Doppler velocimetry; Mach-Zehnder interferometers; material re- sponse. Paper 24087 received Aug. 20, 1997; revised manuscript received Nov.17,1997; accepted for publication Nov. 18, 1997.

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《Optical Engineering》 |1998年第6期|1648-1654|共7页
作者
Yu-Lung Lo; James S. Sirkis;
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作者单位

National Cheng Kung University Department of Mechanical Engineering /Tainan, Taiwan;

University of Maryland Smart Materials and Structures Research Center Department of Mechanical Engineering College Park,/ Maryland 20742;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类光学仪器;
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Strain-rate sensor based on in-fiber Doppler velocimetry

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