28 October 2009 A FBG-based, temperature-insensitive vibration sensor
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In this paper, a novel temperature-insensitive vibration sensor based on a FBG is demonstrated. The FBG is glued in a slanted direction onto the lateral side of a right-angled triangle cantilever beam with an eccentric gear installed on its free end. Vertical vibration applied by the eccentric gear to the cantilever beam leads to a uniform bending along the beam length. As a result, the FBG is chirped and its reflection bandwidth and power change periodically with the variation of the displacement of the free end. The experimental results were compared with the data of vibration measurement of a conventional electrical strain sensor. Furthermore, this sensor is temperature insensitive, owning to the temperatureindependence nature of reflection bandwidth and power of the FBG.
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Wenjun Zhou, Xinyong Dong, Lan Li, Kai Ni, Yongxing Jin, "A FBG-based, temperature-insensitive vibration sensor", Proc. SPIE 7514, Photonics and Optoelectronics Meetings (POEM) 2009: Fiber Optic Communication and Sensors, 751402 (28 October 2009); doi: 10.1117/12.843212; https://doi.org/10.1117/12.843212


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