| NOVEL FIBER GRATING SENSOR DEMODULATION TECHNIQUE BASED ON OPTICAL WAVELET FILTERING |
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| 引用本文： | WANG Yiqun WANG Haifang College of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China ZHU Dandan QIAO Shuxin CAI Yanan College of Electric Engineering,Yanshan University,Qinhuangdao 066004,China. NOVEL FIBER GRATING SENSOR DEMODULATION TECHNIQUE BASED ON OPTICAL WAVELET FILTERING[J]. 机械工程学报(英文版), 2006, 19(1): 134-136 |
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| 作者姓名： | WANG Yiqun WANG Haifang College of Mechanical Engineering Yanshan University Qinhuangdao 066004 China ZHU Dandan QIAO Shuxin CAI Yanan College of Electric Engineering Yanshan University Qinhuangdao 066004 China |
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| 作者单位： | WANG Yiqun WANG Haifang College of Mechanical Engineering，Yanshan University，Qinhuangdao 066004，China ZHU Dandan QIAO Shuxin CAI Yanan College of Electric Engineering，Yanshan University，Qinhuangdao 066004，China |
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| 摘 要： | The optical wavelet filter is designed. It can filter and choose frequency swiftly. It can realize demodulation of distributed fiber Bragg grating(FBG) measurement system. Its scanning resolution and scanning period depend on wavelet function. Wavelet function is controlled by computer. Compared to conventional scan filter, optical wavelet filtering has some advantages such as simple structure, high scan frequency, high resolution and good linearity. At last, the error of optical wavelet filter scanning procedure is analyzed. Scanning step length refers to the shifting of optical wavelet window's central frequency. It affects system precision directly. If scanning step length is different, the measured signal is different. The methods of reducing step length guarantee scanning periodic time are presented.
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| 关 键 词： | 光纤布拉格光栅 传感器 解调技术 滤光片 |
NOVEL FIBER GRATING SENSOR DEMODULATION TECHNIQUE BASED ON OPTICAL WAVELET FILTERING |
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| WANG Yiqun WANG Haifang ZHU Dandan QIAO Shuxin CAI Yanan. NOVEL FIBER GRATING SENSOR DEMODULATION TECHNIQUE BASED ON OPTICAL WAVELET FILTERING[J]. Chinese Journal of Mechanical Engineering, 2006, 19(1): 134-136 |
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| Authors: | WANG Yiqun WANG Haifang ZHU Dandan QIAO Shuxin CAI Yanan |
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| Affiliation: | [1]College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China [2]College of Electric Engineering, Yanshan University, Qinhuangdao 066004, China |
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| Abstract: | The optical wavelet filter is designed. It can filter and choose frequency swiftly. It can realize demodulation of distributed fiber Bragg grating(FBG) measurement system. Its scanning resolution and scanning period depend on wavelet function. Wavelet function is controlled by computer. Compared to conventional scan filter, optical wavelet filtering has some advantages such as simple structure, high scan frequency, high resolution and good linearity. At last, the error of optical wavelet filter scanning procedure is analyzed. Scanning step length refers to the shifting of optical wavelet window's central frequency. It affects system precision directly. If scanning step length is different, the measured signal is different. The methods of reducing step length guarantee scanning periodic time are presented. |
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| Keywords: | Optical wavelet filtering Fiber Bragg grating (FBG) Demodulation Scanning step length |
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