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《Journal of Optoelectronics.Laser》 2009-10
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A practical fiber grating fluid level sensor

WANG Hong-liang,WANG Lin,JIA Zhen-an,WU Hai-feng,YONG Zhen (Ministry of Education Key Laboratory of Photoelectricity Gas-oil Logging and Detecting,Xi′an Shiyou University,Xi′an 710065,China)  
A fiber Bragg grating(FBG) liquid level sensing head with a accordion pipe substrate was disigned,and the reference grating was used to compensate for FBG pressure measurement.We tested the sensor′s characteristics at the liquid level range of 3~30 cm.The temperature compensated experimental curve of the wavelength shift caused by the liquid level change was acquired.The results show that the sensitivity of this liquid level sensor is -0.055 3 nm/cm.The sensing head uses nickel-based alloy as packaging materials,and it can possess the merits of anti-corrosion,fatigue-resistant as so on.It can be used in poor conditions such as the oil storage tanks.
【Fund】: 国家“863”计划资助项目(2006AA06Z210 2007AA03Z413);; 国家自然科学基金资助项目(60727004)
【CateGory Index】: TP212.14
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