NOVEL FIBER GRATING SENSOR DEMODULATION TECHNIQUE BASED ON OPTICAL WAVELET FILTERING

被引：0
|
作者：
WANG Yiqun WANG Haifang College of Mechanical Engineering
机构：
来源：
Chinese Journal of Mechanical Engineering | 2006年 / 01期
基金：
中国国家自然科学基金;
关键词：
Optical wavelet filtering Fiber Bragg grating (FBG) Demodulation Scanning step length;
D O I：
暂无
中图分类号：
TP212 [发送器（变换器）、传感器];
学科分类号：
080202 ;
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.
引用
收藏
页码：134 / 136
页数：3
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