摘要
提出了一种应用于2 kHz高速光栅解调的寻峰算法,给出了该算法对连续光栅反射光峰的解调结果,分析了算法误差和相关影响因素。研究发现,在算法输入信噪比较好的情况下,连续15个光栅的平均解调误差小于0.3 pm,而信噪比较差的情况下,则解调误差大于1 pm,由此可见,算法输入信噪比是影响寻峰精度的决定性因素,在算法输入信噪比较好时该文提出的算法有效地提高了寻峰精度,完全满足实际工程要求。
This paper is focused on a kind of peak-detection algorithm in the high-frequency（2 kHz） demodulation for the fiber Bragg grating（FBG） sensor system.Demodulation results for successive fiber Bragg grating sensor,algorithm error and relative effect factors of errors were introduced.It is demonstrated that the average error of demodulation for successive fifteen fiber Bragg grating sensors is 0.3 pm when the signal noise ratio（SNR）at the input of the algorithm is large.However,when the signal noise ratio（SNR）at the input of the algorithm is small,the demodulation error is larger than 1 pm.So,the signal noise ratio（SNR） at the input of the algorithm is the key factor which influences the precision of peak-detection,and the algorithm descripted in this paper improves the precision of peak-detection effectively when the signal noise ratio（SNR）at the input of the algorithm is large.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2010年第6期59-61,88,共4页
Journal of Wuhan University of Technology
基金
国家自然科学基金(50775167)
关键词
高速解调
光纤布拉格光栅
寻峰算法
信噪比
high-frequency demodulation
fiber Bragg gratings
peak-detection algorithm
signal noise ratio
