双悬梁光纤布拉格光栅低频加速度传感器
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摘要
为了实现光纤布拉格光栅(FBG)加速度信号的准确测量,提出了一种新颖的双悬梁FBG加速度传感器。设计了传感器的结构及封装方法,理论分析了传感器的工作原理。实验研究了传感器的线性响应、温度响应、共振频率和方向抗干扰特性,结果表明,传感器的加速度响应灵敏度为7.81pm/m/s2,相对误差为2.62%,加速度与波长具有较好的线性关系,线性度为99.8%;在67.5～27.5℃内进行了温度补偿实验,能有效消除温度的影响;传感器具有较好的平坦区和较强的抗干扰能力。
In order to realize the precise measurement of acceleration by fiber Bragg grating,a novel double-cantilever beam fiber Bragg grating accelerometer is proposed.Firstly,the configuration and coating of the accelerometer were designed.Secondly,the principle of the fiber Bragg grating accelerometer was analyzed theoretically.The temperature response of FBGs and the acceleration response versus wavelength were analyzed.And the analytical formula of acceleration sensitivity was also deduced.Thirdly,the linear response,temperature response,resonance frequency and anti-jamming of the FBG accelerometer were researched experimentally.Experimental results indicate that the sensitivity is 7.81 pm/m/s2,the relative error is 2.62%.The linearity between acceleration and wavelength is 99.8%.The temperature compensation from 67.5 ℃to 27.5 ℃ is realized triumphantly.The sensor has good flat response range and faculty of anti-jamming.
In order to realize the precise measurement of acceleration by fiber Bragg grating,a novel double-cantilever beam fiber Bragg grating accelerometer is proposed.Firstly,the configuration and coating of the accelerometer were designed.Secondly,the principle of the fiber Bragg grating accelerometer was analyzed theoretically.The temperature response of FBGs and the acceleration response versus wavelength were analyzed.And the analytical formula of acceleration sensitivity was also deduced.Thirdly,the linear response,temperature response,resonance frequency and anti-jamming of the FBG accelerometer were researched experimentally.Experimental results indicate that the sensitivity is 7.81 pm/m/s2,the relative error is 2.62%.The linearity between acceleration and wavelength is 99.8%.The temperature compensation from 67.5 ℃to 27.5 ℃ is realized triumphantly.The sensor has good flat response range and faculty of anti-jamming.
引文
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[13]LIU Qin-peng,QIAO Xue-guang,ZHAO Jian-lin,et al.Tempera-ture-insensitive acceleration sensing technology based onπphase of double fiber Bragg gratings[J.Chinese Journal of La-sers,2011,38(2):0205001-0205006.刘钦朋,乔学光,赵建林,等.双光栅π相位差温度不敏感加速度传感技术研究[J].中国激光,2011,38(2):0205001-0205006.
[14]Kersey A D,Davis M A,Patrick H J,et al.Fiber grating sen-sors[J].J.Light Wave Technol.,1997,15(8):1442-1463.
[2]Todd M D,Johnson G A,Althouse B A,et al.Flexural beam-based fiber Bragg grating accelerometers[J].IEEE Photon.Technol.Lett.,1998,10(11):1605-1607.
[3]Gangopadhyay T K.Prospects for fiber Bragg gratings and fab-ry-perot interferometers in fiber-optic vibration sensing[J].Sens.Actuators A Phys.,2004,113(1):20-38.
[4]Laudati A,Mennella F,Giordano M,et al.A Fiber-optic Bragggrating seismic sensor[J].IEEE Photonics Technology Letters,2007,19(24):1991-1993.
[5]Berkoff T A,Kersey A D.Experimental demonstration of a fiberBragg grating accelerometer[J].IEEE Photon.Technol.Lett.,1996,8(12):1677-1679.
[6]QIAO Xue-guang,GE Peng,JIA Zhen-an,et al.Study on de-modulation technique for fiber grating vibration sensor[J].Journal of Optoelectronics.Laser,2009,20(8):1004-1007.乔学光,葛朋,贾振安,等.光纤光栅振动传感信号解调技术的研究[J].光电子.激光,2009,20(8):1004-1007.
[7]JIANG Ming-shun,MENG Ling,SUI Qing-mei,et al.A noveldouble-edged filter wavelength interrogation technology forFBGs[J].Journal of Optoelectronics.Laser,2011,22(3):355-358.姜明顺,孟玲,隋青美,等.一种新颖的双边缘滤波光纤布拉格光栅解调技术[J].光电子.激光2011,22(3):355-358.
[8]ZHANG Dong-sheng,YAO Kai-fang,LUO Pei,et al.Novel fiberBragg grating accelermeter with high resonant frequency[J].Chinese Journal of Scientific Instrument 2009,30(7):1400-1403.张东生,姚开方,落裴,等.一种新型的光纤光栅高频加速度传感器[J].仪器仪表学报,2009,30(7):1400-1403.
[9]Romero R,Fraza珘o O,Pereira D A,et al.Intensity-referencedand temperature-in dependent curvature-sensing conceptbased on chirped fiber Bragg gratings[J].Appl.Opt.,2005,44(18):3821-3826.
[10]Zhu Y N,Shum P,Lu C,et al.Temperature-insensitive fiberBragg grating accelerometer[J].IEEE Photon.Technol.Lett,2003,15(10):1437-1439.
[11]Fender A,Pherson W N M,Maier R R J,et al.Two-axis tem-perature-insensitive Accelerometer based on multicore fiberBragg gratings[J].IEEE Sens.J.,2008,8(7):1292-1298.
[12]GUO Tuan,SHAO Li-yang,Tam H Y,et al.Tilted fiber gratingaccelerometer incorporating an abrupt biconical taper for clad-ding to core recouping[J].Optics Express,2009,17(9):20651-20660.
[13]LIU Qin-peng,QIAO Xue-guang,ZHAO Jian-lin,et al.Tempera-ture-insensitive acceleration sensing technology based onπphase of double fiber Bragg gratings[J.Chinese Journal of La-sers,2011,38(2):0205001-0205006.刘钦朋,乔学光,赵建林,等.双光栅π相位差温度不敏感加速度传感技术研究[J].中国激光,2011,38(2):0205001-0205006.
[14]Kersey A D,Davis M A,Patrick H J,et al.Fiber grating sen-sors[J].J.Light Wave Technol.,1997,15(8):1442-1463.
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