一种光纤光栅振动与温度同时区分测量的解调方法
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摘要
研究了一种可实现振动与温度同时区分测量的光纤光栅解调方法。利用放大自发辐射光源在1 530 nm附近有一段线性区做边缘滤波器进行滤波解调,用匹配光栅将传感器中的温度与振动信号区分开而实现两者的区分测量。实验证明了此方案的可靠性,解调系统的静态波长灵敏度为1 785.6 mV/nm,波长和温度的分辨力分别达到了0.56 pm和0.044℃。该解调系统结构简单、成本低、分辨率高,可以实现对温度与振动同时监测的工程应用。
A fiber grating demodulation method was studied for simultaneous discriminating measurement of vibration and temperature.The super-fluorescent fiber source has a good linear sideband near 1 530 nm,so we can make use of it to realize filtering demodulation.The temperature and vibration signal were separated and realized the distinction measurements.The scheme was proved dependability by the experiment.The system static wavelength sensitivity is 1785.6 mV/nm.The wavelength and temperature resolutions have reached 0.56 pm and 0.044 ℃ seperately.The demodulation system has the simple structure,low cost,and high resolution.It can be used to monitor the temperature and vibration in engineering application.
A fiber grating demodulation method was studied for simultaneous discriminating measurement of vibration and temperature.The super-fluorescent fiber source has a good linear sideband near 1 530 nm,so we can make use of it to realize filtering demodulation.The temperature and vibration signal were separated and realized the distinction measurements.The scheme was proved dependability by the experiment.The system static wavelength sensitivity is 1785.6 mV/nm.The wavelength and temperature resolutions have reached 0.56 pm and 0.044 ℃ seperately.The demodulation system has the simple structure,low cost,and high resolution.It can be used to monitor the temperature and vibration in engineering application.
引文
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[4]李志全,朱丹丹,吴飞,等.内含光纤Bragg光栅的微型振动加速度测量探头设计及其理论分析[J].传感技术学报,2004,17(1):122-124
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[9]盛秋琴,施可彬,高立模,等.光纤光栅振动传感匹配检测方法的研究[J].光学学报,2002,22(7):847-851.
[10]励强华,李俊庆,李淳飞.应用平衡双光纤光栅动态解调技术测量应力的研究[J].光学学报,2003,23(10):1196-1199.
[11]Lam D K,Garside B K.Characterization of Single-Mode Optical Fi-ber Filters[J].Applied Optics,1981,20:440-450.
[12]沈小燕,林玉池,付鲁华,等.LabVIEW实现光纤光栅传感解调[J].传感技术学报,2008,21(1):61-66.
[2]Ball D A,Morey W W.Standing-Wave Monomode Erbium FiberLaser[J].Photon.Technol.Lett.,1991,3(7):613-615.
[3]乔学光,丁锋,贾振安,等.一种基于ASE光源的边缘滤波解调技术的研究[J].光电子.激光,2009,20(9):1170-1173.
[4]李志全,朱丹丹,吴飞,等.内含光纤Bragg光栅的微型振动加速度测量探头设计及其理论分析[J].传感技术学报,2004,17(1):122-124
[5]乔学光,丁锋,贾振安,等.基于光源滤波的高精度光纤光栅地震检波解调系统[J].光学学报,2010,30(8):2219-2223.
[6]丁锋,李翠翠,乔学光,等.基于边缘滤波解调的光纤光栅低频地震检波器[J].光电子技术,2010,30(4):236-240.
[7]Limberger H G,Fonjsllaz P Y,Salathe R P.Spectral Characteri-zation of Photoninduced High Efficient Bragg Gratings in StandardTelecommunication Fibers[J].Electron.Lett.,1993,29(1):47-49.
[8]Yasukazu Sano,Toshihiko Yoshino.Fast Optical Wavelength Inter-rogator Employing Arrayed Waveguide Grating for Distributed FiberBragg Grating Sensors[J].Journal of Lightwave Technology,2003,21(1):132-139.
[9]盛秋琴,施可彬,高立模,等.光纤光栅振动传感匹配检测方法的研究[J].光学学报,2002,22(7):847-851.
[10]励强华,李俊庆,李淳飞.应用平衡双光纤光栅动态解调技术测量应力的研究[J].光学学报,2003,23(10):1196-1199.
[11]Lam D K,Garside B K.Characterization of Single-Mode Optical Fi-ber Filters[J].Applied Optics,1981,20:440-450.
[12]沈小燕,林玉池,付鲁华,等.LabVIEW实现光纤光栅传感解调[J].传感技术学报,2008,21(1):61-66.
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