两点封装的光纤布拉格加速度传感器设计
|
摘要
提出了一种双半孔梁光纤布拉格光栅(FBG)加速度传感器实现加速度信号测量的方法。首先,建立了两点封装FBG的加速度传感模型,理论分析了加速度与位移敏感点的线性响应。其次,从理论上分析了两点封装方案中FBG的自振特性,讨论了封装光纤的长度和预应力对光纤自振频率的影响。最后,依据FBG的自振特性设计了FBG加速度传感器,并通过实验研究了FBG加速度传感器的线性响应和幅频响应特性。实验结果表明:提出的传感器在10～250Hz具有较好的平坦区,加速度响应灵敏度为41.2pm/G;加速度与波长具有较好的线性关系,线性度为99.8%。同时,该加速度传感器具有较强的方向抗干扰性,轴向交叉灵敏度小于4.8%。
A Double-semicircle Cantilever Beam(DSCB) accelerometer based on a fiber Bragg grating(FBG) was proposed to measure the acceleration signals.Firstly,the model of FBG accelerometer based on the two-dot coating was established,and the linear response between acceleration and displacements of sensitive elements was analyzed theoretically.Then,the natural vibration of the FBG based two-dot coating was described,and the effects of the length and prestress of the coated fiber on natural vibration frequency were discussed.Finally,according to the natural vibration of FBG,the FBG accelerometer was designed,and the linear response,amplitude-frequency characteristics,and direction anti-interference of the FBG accelerometer were researched experimentally.Experimental results indicate that the sensor has good flat response from 10-250 Hz,and the sensitivity of the accelerometer is 41.2 pm/G.Furthermore,the sensor can offer a good linear response in a linear fitting of 99.8% and a good cross-axis anti-interference ability in the cross-axis sensitivity less than 4.8%.
A Double-semicircle Cantilever Beam(DSCB) accelerometer based on a fiber Bragg grating(FBG) was proposed to measure the acceleration signals.Firstly,the model of FBG accelerometer based on the two-dot coating was established,and the linear response between acceleration and displacements of sensitive elements was analyzed theoretically.Then,the natural vibration of the FBG based two-dot coating was described,and the effects of the length and prestress of the coated fiber on natural vibration frequency were discussed.Finally,according to the natural vibration of FBG,the FBG accelerometer was designed,and the linear response,amplitude-frequency characteristics,and direction anti-interference of the FBG accelerometer were researched experimentally.Experimental results indicate that the sensor has good flat response from 10-250 Hz,and the sensitivity of the accelerometer is 41.2 pm/G.Furthermore,the sensor can offer a good linear response in a linear fitting of 99.8% and a good cross-axis anti-interference ability in the cross-axis sensitivity less than 4.8%.
引文
[1]MITA A,YOKOI I.Fiber Bragg grating acceler-ometer for structural health monitoring[C].FifthInternational Conference on Motion and VibrationControl(MOVIC2000),Sydney,2000.
[2]TODD M D,JOHNSON G A,ALTHOUSE B A,et al..Flexural beam-Based fiber Bragg grating ac-celerometer[J].IEEE Photo.Technol.Lett,1998,10(11):1605-1607.
[3]ZHANG J H,QIAO X G,HU M L,et al..Flex-tensional fiber Bragg grating-based accelerometer forlow frequency vibration measurement[J].ChineseOptics Letters,2011,9(9):090607.
[4]BERKOFF T A,KERSEY A D.Experimental demon-stration of a Fiber Bragg grating accelerometer[J].IEE Photo.Technol.Lett,1996,8(12):1677-1679.
[5]李学成,刘肃,张文涛,等.双膜片结构光纤光栅地震检波器低频特性的研究[J].光电子.激光,2010,21(4):529-532.LI X CH,LIU S,ZHANG W T,et al..Study onlow frequency characteristic of double diaphragm fiberBragg grating geophone[J].Journal of Optoelectron-ics Laser,2010,21(4):529-532.(in Chinese)
[6]沈洋,孙利民.高灵敏度温度自补偿型光纤光栅加速度传感器设计[J].结构工程师,2009,25(2):141-146.SHEN Y,SUN L M.Design of FBG-based acceler-ometer with high sensitivity and temperature self-compensation[J].Structural Engineers,2009,25(2):141-146.(in Chinese)
[7]刘波,牛文成,杨亦飞,等.新型光纤光栅加速度传感器的设计与实现[J].仪器仪表学报,2006,27(1):42-44.LIU B,NIU W CH,YANG Y F,et al..A Novelfiber Bragg grating accelerometer[J].ChineseJournal of scientific Instrument,2006,27(1):42-44.(in Chinese)
[8]李国利,赵彦涛,李志全.基于双光纤光栅的加速度传感探头结构的设计[J]压电与声光,2006,28(4):387-389.LI G L,ZHAO Y T,LI ZH Q.Design of accelera-tion sensing probe structure based on dual fiberBragg grating[J].Piezolectectrics&Acoustoop-tics,2006,27(6):299-301.(in Chinese)
[9]赵彦涛,李志全.基于Bragg光纤光栅的三维加速度传感器的研究[J].仪器仪表学报,2006,27(6):299-301.ZHAO Y T,LI ZH Q.Study on triaxial accelerometerbased on FBG[J].Chinese Journal of Scientific In-strument,2006,27(6):299-301.(in Chinese)
[10]WENG Y Y,QIAO X G,FENG ZH Y,et al..Compact FBG diaphragm accelerometer based onL-shaped rigid cantilever beam[J].2011,9(10):100604.
[11]MULLER M S,BUCK T C,KOCH A W.Fiberbragg grating-based acceleration sensor[C].Opto-mechatronic Technologies,International Symposi-um,2009:127-123.
[12]OUSAMA M A,MUSTAFA A A,KARTHIKN.Novel three-axes fiber Bragg grating acceler-ometer[J].SPIE,2009:58770Z.
[13]王焕定,章梓茂,景瑞.结构力学[M],北京:高等教育出版社,2009.WANG H D,ZHANG X M,JING R.Structuralmechanics[M],Beijing:Higher Education Press,2009.(in Chinese)
[2]TODD M D,JOHNSON G A,ALTHOUSE B A,et al..Flexural beam-Based fiber Bragg grating ac-celerometer[J].IEEE Photo.Technol.Lett,1998,10(11):1605-1607.
[3]ZHANG J H,QIAO X G,HU M L,et al..Flex-tensional fiber Bragg grating-based accelerometer forlow frequency vibration measurement[J].ChineseOptics Letters,2011,9(9):090607.
[4]BERKOFF T A,KERSEY A D.Experimental demon-stration of a Fiber Bragg grating accelerometer[J].IEE Photo.Technol.Lett,1996,8(12):1677-1679.
[5]李学成,刘肃,张文涛,等.双膜片结构光纤光栅地震检波器低频特性的研究[J].光电子.激光,2010,21(4):529-532.LI X CH,LIU S,ZHANG W T,et al..Study onlow frequency characteristic of double diaphragm fiberBragg grating geophone[J].Journal of Optoelectron-ics Laser,2010,21(4):529-532.(in Chinese)
[6]沈洋,孙利民.高灵敏度温度自补偿型光纤光栅加速度传感器设计[J].结构工程师,2009,25(2):141-146.SHEN Y,SUN L M.Design of FBG-based acceler-ometer with high sensitivity and temperature self-compensation[J].Structural Engineers,2009,25(2):141-146.(in Chinese)
[7]刘波,牛文成,杨亦飞,等.新型光纤光栅加速度传感器的设计与实现[J].仪器仪表学报,2006,27(1):42-44.LIU B,NIU W CH,YANG Y F,et al..A Novelfiber Bragg grating accelerometer[J].ChineseJournal of scientific Instrument,2006,27(1):42-44.(in Chinese)
[8]李国利,赵彦涛,李志全.基于双光纤光栅的加速度传感探头结构的设计[J]压电与声光,2006,28(4):387-389.LI G L,ZHAO Y T,LI ZH Q.Design of accelera-tion sensing probe structure based on dual fiberBragg grating[J].Piezolectectrics&Acoustoop-tics,2006,27(6):299-301.(in Chinese)
[9]赵彦涛,李志全.基于Bragg光纤光栅的三维加速度传感器的研究[J].仪器仪表学报,2006,27(6):299-301.ZHAO Y T,LI ZH Q.Study on triaxial accelerometerbased on FBG[J].Chinese Journal of Scientific In-strument,2006,27(6):299-301.(in Chinese)
[10]WENG Y Y,QIAO X G,FENG ZH Y,et al..Compact FBG diaphragm accelerometer based onL-shaped rigid cantilever beam[J].2011,9(10):100604.
[11]MULLER M S,BUCK T C,KOCH A W.Fiberbragg grating-based acceleration sensor[C].Opto-mechatronic Technologies,International Symposi-um,2009:127-123.
[12]OUSAMA M A,MUSTAFA A A,KARTHIKN.Novel three-axes fiber Bragg grating acceler-ometer[J].SPIE,2009:58770Z.
[13]王焕定,章梓茂,景瑞.结构力学[M],北京:高等教育出版社,2009.WANG H D,ZHANG X M,JING R.Structuralmechanics[M],Beijing:Higher Education Press,2009.(in Chinese)
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心