Optical fiber sensors using vibration wires

Maria Qing Feng; Hideyo Suzuki

doi:10.1117/12.185044

14 September 1994 Optical fiber sensors using vibration wires

Maria Qing Feng, Hideyo Suzuki

Proceedings Volume 2360, Tenth International Conference on Optical Fibre Sensors; (1994) https://doi.org/10.1117/12.185044
Event: 10th Optical Fibre Sensors Conference, 1994, Glasgow, United Kingdom

Abstract

Experimental research of new optical fiber sensors for monitoring civil infrastructure systems is presented. The proposed optical sensors employ a vibrating wire whose tension can be modulated by external force, strain, or vibration and is translated into the change in the wire vibration frequency. The wire vibration frequency is detected by light sent to and reflected from the wire through an optical fiber cable. Compared to other existing optical fiber sensors which tend to suffer from the lack of reliability and robustness, the proposed sensors have two significant advantages: one is that the sensing head is a vibrating wire (rather than an optical fiber), which can sense a specific physical quantity without interference from miscellaneous effects; the other is that the wire vibration is a well understood physical phenomenon. In fact, with a high level of reliability, its frequency is optically measured and transmitted to recording and other devices through the optical fiber without attenuation or distortion. These advantages make the sensor system simple, reliable and robust, and hence moi readily deployable in civil infrastructure applications.

Citation Download Citation

Maria Qing Feng and Hideyo Suzuki "Optical fiber sensors using vibration wires", Proc. SPIE 2360, Tenth International Conference on Optical Fibre Sensors, (14 September 1994); https://doi.org/10.1117/12.185044

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