A FIBRE OPTIC EXTRINSIC FABRY-PEROT INTERFEROMETER WITH TEMPERATURE COMPENSATION FOR FAULT MEASUREMENT
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摘要:
针对光纤EFPI传感器通常尺寸很小，而断层尺寸相对较大，导致光纤EFPI传感器在待测断层处安装不便的情况，提出了一种可用于断层测量的光纤外腔型法布里-珀罗位移传感器。两根陶瓷插芯从陶瓷套管的两端插入构成EFPI结构，通过使用金属内管和金属外管，增大了光纤EFPI位移传感器的尺寸；并且金属外管的两端采用O型圈密封，因此该EFPI位移传感器能够防水防尘。为了消除温度对EFPI位移传感器的影响，两根金属内管采用了不同热膨胀系数的材料在结构上进行温度补偿。在温度连续变化的环境下，对腔长为718.39 m的EFPI位移传感器进行了测量。测量结果显示，经过温度补偿设计后，位移传感器的温度系数由0.14 μm/℃下降到了-0.04 μm/℃，并呈现过补偿。
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关键词:
- 光纤传感器 /
- 外腔型法布里-珀罗干涉仪 /
- 温度补偿 /
- 断层测量
Abstract:Fibre optic EFPI sensor is usually very small in size while the fault size is relatively big, so it is not suitable to be installed at the fault for the fibre optic EFPI. As a result, fibre optic extrinsic Fabry-Perot interferometer for fault measurement, EFPI was present. EFPI structure is formed as two ceramic ferrule inserted into the ceramic casing from the ends. Two ceramic ferrule are respectively fixed on the two metal inner tube, which are inserted into the metal outer tube form the two ends. O-type sealing rings are put at each end of the metal outer tube, so the EFPI displacement sensor is capable of waterproof and dustproof. In order to eliminate the influence of temperature on EFPI displacement sensor, two metal tubes with different thermal expansion coefficient material are chosen for temperature compensation in the structure. In the experiment, EFPI displacement sensor with 718.39 μm of the cavity length was measured in a continuous changing temperature situation. The results shows that temperature coefficient of displacement sensor has declined by 0.14 μm/℃ to -0.04 μm/℃ after temperature compensation, and showed a compensation.
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[1] Bhatia V, Murphy K A, Claus R O, et al. Recent developments in optical-fiber-based extrinsic Fabry-Perot interferometric strain sensing technology[J]. Smart Materials and Structures, 1995, 4(4):246~251. doi: 10.1088/0964-1726/4/4/004
[2] Lee B. Review of the present status of optical fiber sensors[J]. Optical Fiber Technology, 2003, 9(2):57~79. doi: 10.1016/S1068-5200(02)00527-8
[3] Murphy K A, Gunther M F, May R G, et al. EFPI sensor manufacturing and applications[C]//Crowe C R. Smart Structures and Materials 1996:Industrial and commercial applications of smart structures technologies. San Diego:The International Society for Optical Engineering, 1996:476~482.
[4] Xiao H, Deng J D, Wang Z Y, et al. Fiber optic pressure sensor with self-compensation capability for harsh environment applications[J]. Optical Engineering, 2005, 44(5):544~547. https://www.netl.doe.gov/File%20Library/Events/2014/crosscutting/Crosscutting_20140521_1600A_Clemson.pdf
[5] Ferreira L A, Ribeiro A B L, Santos J L, et al. Simultaneous measurement of displacement and temperature using a low finesse cavity and a fiber Bragg grating[J]. IEEE Photonics Technology Letters, 1996, 8(11):1519~1521. doi: 10.1109/68.541569
[6] Ferreira L A, Ribeiro A B L, Santos J L, et al. Simultaneous displacement and temperature sensing using a white light interrogated low finesse cavity in line with a fiber Bragg grating[J]. Smart Materials and Structures, 1998, 7(2):189~194. doi: 10.1088/0964-1726/7/2/006
[7] Liu T, Fernando G F, Rao Y J, et al. Simultaneous strain and temperature measurements in composites using a multiplexed fibre Bragg grating sensor and an extrinsic Fabry-Perot sensor[C]//Claus R O. Smart structures and materials 1997:Smart Sensing, Processing, and Instrumentation. San Diego:The International Society for Optical Engineering, 1997:203~212.
[8] Bremer K, Lewis E, Moss B, et al. Conception and preliminary evaluation of an optical fibre sensor for simultaneous measurement of pressure and temperature[J]. Journal of Physics:Conference Series, 2009, 178(1):12~16. http://www.dbpia.co.kr/Journal/ArticleDetail/NODE00645252
[9] Bremer K, Lewis E, Leen G, et al. 2011 Temperature compensated miniature all-glass fibre optic pressure sensor[C]//Institute of Electrical and Electronics Engineers. Sensors. Piscataway:IEEE, 2011:105~108.
[10] Liu T, Fernando G F, Zhang Z Y, et al. Simultaneous strain and temperature measurements in composites using extrinsic Fabry-Perot interferometric and intrinsic rare-earth doped fiber sensors[J]. Sensors and Actuators A:Physical, 2000, 80(3):208~215. doi: 10.1016/S0924-4247(99)00309-X
[11] Zhang Z Y, Grattan K T V, Palmer A W, et al. Potential for temperature sensor applications of highly neodymium-doped crystals and fiber at up to approximately 1000℃[J]. Review of Scientific Instruments, 1997, 68(7):2759~2763. doi: 10.1063/1.1148191
[12] Xu J C, Wang X W, Cooper K L, et al. Miniature temperature-insensitive Fabry-Perot fiber-optic pressure sensor[J]. Photonics Technology Letters, 2006, 18(10):1134~1136. doi: 10.1109/LPT.2006.873361
[13] Jiang Y. 2008 Fourier transform white-light interferometry for the measurement of fiber-optic extrinsic Fabry-Pérot Interferometric sensors[J]. Photonics Technology Letters, 20(2):75~77. doi: 10.1109/LPT.2007.912567
[14] Jiang Y, Tang C J. High-finesse micro-lens fiber-optic extrinsic Fabry-Perot interferometric sensors[J]. Smart Materials and Structures, 2008, 17(5):55~67. https://link.springer.com/article/10.1007/s13320-010-0014-z
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