传感技术学报Issue(4)：521-525,5.DOI:10.3969/j.issn.1004-1699.2015.04.012
一种改进小波阈值函数的光纤光栅传感信号去噪方法∗
Improved Threshold De-Noising Method of Fiber Bragg Grating Sensor Signal Based on Wavelet Transform
摘要
Abstract
Noise in the fiber Bragg grating( FBG) sensing has seriously affected the detection precision of the center wavelength,and it should be processed to reduce noises. A modified logarithmic threshold method is adopted,and the reasonable wavelet basis and decomposition level are determined by analyzing the disadvantages of traditional soft and hard wavelet threshold de-noising methods. The simulation results show that the improved method can obtain the maximum signal-to-noise ratio ( SNR ) and the minimum root mean square error ( RMSE ) , and the SNR improves 1.5 to 4 dB than traditional methods. The de-noising effect of this method is proved by experiments.关键词
光纤光栅/去噪/小波/阈值函数/信噪比Key words
fiber Bragg grating/de-noising/wavelet/threshold function/signal-to-noise ratio分类
信息技术与安全科学引用本文复制引用
曹京京,胡辽林,赵瑞..一种改进小波阈值函数的光纤光栅传感信号去噪方法∗[J].传感技术学报,2015,(4):521-525,5.基金项目
陕西省自然科学基金项目(2014JM7273) （2014JM7273）
