Application of fiber bragg grating level sensor and Fabry-Pérot pressure sensor to simultaneous measurement of liquid level and specific gravity

Chih Wei Lai, Yu Lung Lo, Jiahn Piring Yur, Chin Ho Chuang

研究成果: Article同行評審

81 引文 斯高帕斯(Scopus)

摘要

This study is proposed for obtaining simultaneous measurements of the level and specific gravity of a liquid using a dual-optical-fiber-sensor system comprising a fiber Bragg grating (FBG) level sensor and a Fabry-Ṕrot (FP) pressure sensor. In the FBG level sensor, the liquid level is derived from the FBG wavelength shift induced when the buoyancy is applied on a cantilever beam. Meanwhile, in the FP sensor, the pressure is calculated from the change in cavity length which takes place when the sensor is immersed. The experimental results show that the FBG level and FP pressure sensors have sensitivities of 0.01491 nm/cm and 0.1569 μm/kPa, respectively. Analytical formulae are derived for the level and specific gravity of the liquid in terms of the Bragg wavelength shift, the change in cavity length, and the vertical separation distance between the two sensors. The average measurement errors of the liquid level and specific gravity are found to be 0.0323 and 0.0528 m, respectively.

原文English
文章編號5936662
頁(從 - 到)827-831
頁數5
期刊IEEE Sensors Journal
12
發行號4
DOIs
出版狀態Published - 2012

All Science Journal Classification (ASJC) codes

  • 儀器
  • 電氣與電子工程

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