长周期光纤光栅线性滤波解调系统实验研究及改进
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摘要
在利用长周期光纤光栅(LPFG)准线性段进行线性滤波解调中,对LPFG准线性段进行一次线性拟合得到的结果误差较大,提出通过对LPFG透射谱的分段线性拟合和对LPFG进行温度控制使其谐振波长移动来选择不同的线性段,从而实现不同灵敏度解调。给出了基于DSP的实现方法及基于VC++对话框中MFC编程实现的监测界面。最后简要给出了该系统的潜在应用领域。
Since the error of the result is comparatively large in the linear filtering demodulation with the quasi-linear waveband of LPFG when fitting the quasi-linear waveband of long period fiber grating(LPFG)only once,through fitting the quasi-linear waveband of LPFG in several sub-wavebands and controlling the temperature of the LPFG were introduced so as to cause the shift of the resonant wavelength of the LPFG to realize demodulation with different sensibility.The implementation based on DSP was given,the monitoring interface realized by MFC programming based on the dialog box of the VC++ was given,and the potential application areas were given as well.
Since the error of the result is comparatively large in the linear filtering demodulation with the quasi-linear waveband of LPFG when fitting the quasi-linear waveband of long period fiber grating(LPFG)only once,through fitting the quasi-linear waveband of LPFG in several sub-wavebands and controlling the temperature of the LPFG were introduced so as to cause the shift of the resonant wavelength of the LPFG to realize demodulation with different sensibility.The implementation based on DSP was given,the monitoring interface realized by MFC programming based on the dialog box of the VC++ was given,and the potential application areas were given as well.
引文
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[9]贾宏志,李育林,忽满利.长周期光纤光栅传感器温度和应变灵敏度分析[J].光子学报,1999,28(8):711-713.JIA Hong-zhi,LI Yu-lin,HU Man-li.Analysis of strain and temperature sensitivities of long-period fiber gratings[J].Acta Photonica Sinica,1999,28(8):711-713.(in Chinese)
[10]何苏勤,王忠勇.TMS320C2000系列DSP原理及实用技术[M].北京:电子工业出版社,2003.HE Su-qin,WANG Zhong-yong.The principle and application technology of Family TMS320C2000DSP[M].Beijing:Publishing House of Electronics Industry,2003.(in Chinese)
[11]王茂飞,程昱.TMS320C2000DSP技术与应用开发[M].北京:清华大学出版社,2007:121-122.WANG Mao-fei,CHENG Yu.The technology and application exploitation of DSP of Family TMS320C2000[M].Beijing:Tsinghua University Press,2007:121-122.(in Chinese)
[12]龚建伟,熊光明.Visual C++/Turbo C串口通信编程实战[M].北京:电子工业出版社,2004:119-127.GONG Jian-wei,XIONG Guang-ming.The actual combat of serial communication programming with Visual C++/Turbo C[M].Beijing:Publishing House of Electronics Industry,2004:119-127.(in Chinese)
[2]KERSEY A D,BERKOFF T A,MOREY W W.Multiplexed fiber Bragg grating stainsensor system with a fiber F-P wavelength filter[J].Optics Letters,1993,18(16):1370-1372.
[3]李智全,李亚萍,朱丹丹,等.基于滤波法的光纤光栅传感解调方案[J].应用光学,2006,27(4):327-331.LI Zhi-quan,LI Ya-ping,ZHU Dan-dan,et al.Demodulation scheme for filtering method based fiber Bragg grating sensing[J].Journal of Applied Optics,2006,27(4):327-331.(in Chinese)
[4]KERSEY A D,BERKOFF T A,MOREY W W.Highresolution fiber-grating based strain sensor with interferometric wavelength-shift detection[J].Electronics Letters,1992,28(3):236-238.
[5]BALL G A,MOREY W W,CHEO P K.Fiber laser source analyzer for Bragg grating sensor array interrogation[J].Journal of Lightwave Technology,1994,12(4):700-702.
[6]刘波,童峥嵘,陈少华,等.一种长周期光纤光栅边沿滤波线性解调新方法[J].光学学报,2004,24(2):199-202.LIU Bo,TONG Zheng-rong,CHEN Shao-hua,et al.A novel method of edge filter linear demodulation using long-period grating in fiber sensor system[J].Acta Optica Sinica,2004,24(2):199-202.(in Chinese)
[7]FALLON R W,ZHANG L,EVERALL L A,et al.All-fiber optical sensing system:Bragg grating sensor interrogated by a long-period grating[J].Measurement Science and Technology,1998,9(12):1969-1973.
[8]黎芳,江月松,张绪国.基于长周期光纤光栅的新型地震检波器[J].应用光学,2008,29(1):101-104.LI Fang,JIANG Yue-song,ZHANG Xu-guo.Novel geophone based on long period fiber grating[J].Journal of Applied Optics,2008,29(1):101-104.(in Chinese)
[9]贾宏志,李育林,忽满利.长周期光纤光栅传感器温度和应变灵敏度分析[J].光子学报,1999,28(8):711-713.JIA Hong-zhi,LI Yu-lin,HU Man-li.Analysis of strain and temperature sensitivities of long-period fiber gratings[J].Acta Photonica Sinica,1999,28(8):711-713.(in Chinese)
[10]何苏勤,王忠勇.TMS320C2000系列DSP原理及实用技术[M].北京:电子工业出版社,2003.HE Su-qin,WANG Zhong-yong.The principle and application technology of Family TMS320C2000DSP[M].Beijing:Publishing House of Electronics Industry,2003.(in Chinese)
[11]王茂飞,程昱.TMS320C2000DSP技术与应用开发[M].北京:清华大学出版社,2007:121-122.WANG Mao-fei,CHENG Yu.The technology and application exploitation of DSP of Family TMS320C2000[M].Beijing:Tsinghua University Press,2007:121-122.(in Chinese)
[12]龚建伟,熊光明.Visual C++/Turbo C串口通信编程实战[M].北京:电子工业出版社,2004:119-127.GONG Jian-wei,XIONG Guang-ming.The actual combat of serial communication programming with Visual C++/Turbo C[M].Beijing:Publishing House of Electronics Industry,2004:119-127.(in Chinese)
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