基于长周期光纤光栅线性边缘滤波的地震波解调系统
|
摘要
设计一种针对地震波信号的解调系统,讨论了长周期光纤光栅(LPFG)制作时参数的控制方法,选用边缘特性良好的LPFG做线性边缘滤波器,在1 550.35~1 553.14 nm间具有0.998 96的线性拟合度,功率灵敏度达1.692 dBm/nm。在信号处理中,采用参考光路与滤波光路比较,消除本底信号的影响;利用LabVIEW软件代替部分硬件,并作为信号采集及信号分析处理功能模块,使系统解调检测波长灵敏度达到1.13 pm/mV,在低频段(2~150 Hz),动态分辨率为0.08 pm/(Hz)~(1/2),动态范围为50~60 dB。本文解调系统操作简单、灵敏度高、稳定性好、性价比高且响应速度快,可以用于地震勘探。
In the interrogation system designed for seismic sensing,the parameter control of long period fiber grating(LPFG) during fabrication is discussed,and the LPFG is employed as a linear edge filter because of its high slope efficiency of 0.998 96 from 1 550.35 nm to 1 553.14 nm and power sensitivity of 1.692 dBm/nm.The background noise is eliminated by comparing the reference signal with the filtered signal.LabVIEW is used as processing function module to acquire and analyze data.The sensitivity of detecting wavelength can reach over 1.13 pm/mV(2-150 Hz in frequency domain),the dynamic range is 50-60 dB,and the resolution can reach 0.08 pm/Hz)~(1/2).The results show that this interrogation system has high sensitivity,good stability,and fast speed,and it can be used for seismic exploration.
In the interrogation system designed for seismic sensing,the parameter control of long period fiber grating(LPFG) during fabrication is discussed,and the LPFG is employed as a linear edge filter because of its high slope efficiency of 0.998 96 from 1 550.35 nm to 1 553.14 nm and power sensitivity of 1.692 dBm/nm.The background noise is eliminated by comparing the reference signal with the filtered signal.LabVIEW is used as processing function module to acquire and analyze data.The sensitivity of detecting wavelength can reach over 1.13 pm/mV(2-150 Hz in frequency domain),the dynamic range is 50-60 dB,and the resolution can reach 0.08 pm/Hz)~(1/2).The results show that this interrogation system has high sensitivity,good stability,and fast speed,and it can be used for seismic exploration.
引文
[1]TIAN Fei-fei,CONG Jia-wei,YUN Bin-feng,et al.A fiber Bragggrating current sensor with temperature compensation[J].Op-toelectronics Letters,2009,5(5):347-351.
[2]QIAO Xue-guang,CHEN Yi,JIA Zhen-an.Study on simultaneousdiscriminating measurement of temperature and pressure basedon dual FBG[J].Journal of Optoelectronics.Laser,2010,21(1):12-14.乔学光,陈懿,贾振安.基于双光纤光栅温度压力同时区分测量的研究[J].光电子.激光,2010,21(1):12-14.
[3]QIAO Xue-guang,FENG Fei,JIA Zhen-an,et al.Study on pres-sure sensing technology of a compensable fiber grating[J].Journal of Optoelectronics.Laser,2009,20(1):9-11.乔学光,冯飞,贾振安,等.光纤光栅高压传感器封装技术实验研究[J].光电子.激光,2009,20(1):9-11.
[4]YU Jun.Research Fiber Bragg Grating Geophone[D].Tianjin:Tianjin University of Science&Technology,2005:5-6.余俊.光纤光栅地震检波器研究[D].天津:天津科技大学,2005:5-6.
[5]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.
[6]YU You-long,ZHAO Hong-xia.A novel demodulation schemefor fiber Bragg grating sensor system[J].IEEE Photonics Tech-nology Letters,2005,17(1):166-168.
[7]LIU Li-hui,ZHAO Qi-da,ZHANG Hao,et al.Progress in demod-ulation technology of fiber Bragg grating senor[J].Laser&Optoelectronics Progress,2004,41(7):35-39.刘丽辉,赵启大,张昊,等.光纤光栅传感器的解调技术进展[J].激光与光电子学进展,2004,41(7):35-39.
[8]Kersey A D,Berkoff T A,Morey W W.Multiplexed fiber Bragggrating strain-sensor system with a fiber Fabry-Perot wave-length filter[J].Opt.Lett.,1993,18(16):1370-1372.
[9]Henderson P J,Fisher N E,Jackson D A.Proceeding of the12th international conference on optical fiber sensors[C].1997,186-189.
[10]GU Zheng-tian,ZHAO Xiao-yun,ZHANG Jiang-tao.Transmis-sion spectra of coated phase shifted long-period fiber gratings[J].Optoelectronics Letters,2009,5(4):244-247.
[11]JIANG Ming-shun,FENG De-jun,SUI Qing-mei,et al.A novel fi-ber Bragg grating vibration sensor[J].Journal of Optoelectron-ics.Laser,2010,21(1):34-37.姜明顺,冯德军,隋青美,等.新型光纤Bragg光栅振动传感系统[J].光电子.激光,2010,21(1):34-37.
[12]QIAO Wen,LI Gang.Design of a new style of fiber Bragg grat-ing demodulation system[J].Journal of Optoelectronics.La-ser,2007,18(10):1188-1190.乔文,李刚.一种新型光纤光栅传感器解调系统[J].光电子激光,2007,18(10):1188-1190.
[13]ZHOU Bing,Liang Da-kai,WANG Yan.A Dynamic MeasuringMethod Based on Long Period Fiber Grating[J].Piezoelectrics&Acoustooptics,2009,31(1):38-40.周兵,梁大开,王彦.基于长周期光纤光栅的动态检测技术研究[J].压电与声光,2009,31(1):38-40.
[14]HUANG Yong-lin,DAI Sen.Edge filter demodulation of fiberBragg grating displacement sensing using long period grating[J].Chinese Journal of Sensors and Actuators,2009,22(9):1266-1269.黄勇林,代森.基于长周期光栅边缘滤波解调的光纤布喇格光栅位移传感研究[J].传感技术学报,2009,22(9):1266-1269.
[15]Erdogan T.Fiber grating spectra[J].Journal of LightwaveTechnology,1997,15(8):1277-1294.
[16]RAO Yun-jiang,WANG Yi-ping,ZHU Tao,et al.Principle andApplication of Optical Fiber Grating[M].Beijing:SciencePress,2006,86-104.饶云江,王义平,朱涛,等.光纤光栅原理及应用[M].北京:科学出版社,2006,86-104.
[17]YAN Li-qin.Research on the signals demodulation system of fi-ber grating geophone[D].Tianjin:Tianjin University of Technol-ogy,2006,32-34.闫利琴.光纤光栅地震检波器信号解调系统的研究[D].天津:天津理工大学,2006,32-34.
[18]ZHOU Bing,LIANG Da-kai,Wang Yan.A method of tempera-ture compensation for long-period fiber grating[J].Piezoelec-trics&Acoustooptics,2008,31(2):159-160.周兵,梁大开,王彦.长周期光纤光栅的一种温度补偿方法[J].压电与声光,2008,31(2):159-160.
[19]ZHU Zhu,ZENG Jie,LIANG Da-kai,et al.Research on dynamicdemodulating technique for fiber grating sensor system[J].Chinese Journal of Lasers,2008,35:254-258.朱珠,曾捷,梁大开,等.一种光纤布拉格光栅动态解调系统的研究[J].中国激光,2008,35:254-258.
[2]QIAO Xue-guang,CHEN Yi,JIA Zhen-an.Study on simultaneousdiscriminating measurement of temperature and pressure basedon dual FBG[J].Journal of Optoelectronics.Laser,2010,21(1):12-14.乔学光,陈懿,贾振安.基于双光纤光栅温度压力同时区分测量的研究[J].光电子.激光,2010,21(1):12-14.
[3]QIAO Xue-guang,FENG Fei,JIA Zhen-an,et al.Study on pres-sure sensing technology of a compensable fiber grating[J].Journal of Optoelectronics.Laser,2009,20(1):9-11.乔学光,冯飞,贾振安,等.光纤光栅高压传感器封装技术实验研究[J].光电子.激光,2009,20(1):9-11.
[4]YU Jun.Research Fiber Bragg Grating Geophone[D].Tianjin:Tianjin University of Science&Technology,2005:5-6.余俊.光纤光栅地震检波器研究[D].天津:天津科技大学,2005:5-6.
[5]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.
[6]YU You-long,ZHAO Hong-xia.A novel demodulation schemefor fiber Bragg grating sensor system[J].IEEE Photonics Tech-nology Letters,2005,17(1):166-168.
[7]LIU Li-hui,ZHAO Qi-da,ZHANG Hao,et al.Progress in demod-ulation technology of fiber Bragg grating senor[J].Laser&Optoelectronics Progress,2004,41(7):35-39.刘丽辉,赵启大,张昊,等.光纤光栅传感器的解调技术进展[J].激光与光电子学进展,2004,41(7):35-39.
[8]Kersey A D,Berkoff T A,Morey W W.Multiplexed fiber Bragggrating strain-sensor system with a fiber Fabry-Perot wave-length filter[J].Opt.Lett.,1993,18(16):1370-1372.
[9]Henderson P J,Fisher N E,Jackson D A.Proceeding of the12th international conference on optical fiber sensors[C].1997,186-189.
[10]GU Zheng-tian,ZHAO Xiao-yun,ZHANG Jiang-tao.Transmis-sion spectra of coated phase shifted long-period fiber gratings[J].Optoelectronics Letters,2009,5(4):244-247.
[11]JIANG Ming-shun,FENG De-jun,SUI Qing-mei,et al.A novel fi-ber Bragg grating vibration sensor[J].Journal of Optoelectron-ics.Laser,2010,21(1):34-37.姜明顺,冯德军,隋青美,等.新型光纤Bragg光栅振动传感系统[J].光电子.激光,2010,21(1):34-37.
[12]QIAO Wen,LI Gang.Design of a new style of fiber Bragg grat-ing demodulation system[J].Journal of Optoelectronics.La-ser,2007,18(10):1188-1190.乔文,李刚.一种新型光纤光栅传感器解调系统[J].光电子激光,2007,18(10):1188-1190.
[13]ZHOU Bing,Liang Da-kai,WANG Yan.A Dynamic MeasuringMethod Based on Long Period Fiber Grating[J].Piezoelectrics&Acoustooptics,2009,31(1):38-40.周兵,梁大开,王彦.基于长周期光纤光栅的动态检测技术研究[J].压电与声光,2009,31(1):38-40.
[14]HUANG Yong-lin,DAI Sen.Edge filter demodulation of fiberBragg grating displacement sensing using long period grating[J].Chinese Journal of Sensors and Actuators,2009,22(9):1266-1269.黄勇林,代森.基于长周期光栅边缘滤波解调的光纤布喇格光栅位移传感研究[J].传感技术学报,2009,22(9):1266-1269.
[15]Erdogan T.Fiber grating spectra[J].Journal of LightwaveTechnology,1997,15(8):1277-1294.
[16]RAO Yun-jiang,WANG Yi-ping,ZHU Tao,et al.Principle andApplication of Optical Fiber Grating[M].Beijing:SciencePress,2006,86-104.饶云江,王义平,朱涛,等.光纤光栅原理及应用[M].北京:科学出版社,2006,86-104.
[17]YAN Li-qin.Research on the signals demodulation system of fi-ber grating geophone[D].Tianjin:Tianjin University of Technol-ogy,2006,32-34.闫利琴.光纤光栅地震检波器信号解调系统的研究[D].天津:天津理工大学,2006,32-34.
[18]ZHOU Bing,LIANG Da-kai,Wang Yan.A method of tempera-ture compensation for long-period fiber grating[J].Piezoelec-trics&Acoustooptics,2008,31(2):159-160.周兵,梁大开,王彦.长周期光纤光栅的一种温度补偿方法[J].压电与声光,2008,31(2):159-160.
[19]ZHU Zhu,ZENG Jie,LIANG Da-kai,et al.Research on dynamicdemodulating technique for fiber grating sensor system[J].Chinese Journal of Lasers,2008,35:254-258.朱珠,曾捷,梁大开,等.一种光纤布拉格光栅动态解调系统的研究[J].中国激光,2008,35:254-258.
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