光纤应变监测系统的数据处理方法研究  

Research on Data Processing Method of Optical Fiber Strain Detection System

作　　者：胡海军[1] 龚华平[1] 郑紫珊 王楠[1] 杨效[1] 

机构地区：[1]中国计量学院光学与电子科技学院,浙江杭州310018

出　　处：《光学与光电技术》2013年第5期25-28,共4页Optics & Optoelectronic Technology

基　　金：浙江省自然科学基金(Y1110687;Y1110700)资助项目

摘　　要：光纤应变监测系统的数据不可避免的存在噪声,导致系统的虚假预警。为了有效的消除数据噪声,提高数据准确性,减小系统的预警误报,提出了一种新的数据处理方法。首先对应变数据进行小波多层滤波处理,然后用FFT低通滤波获得信号的轮廓,再用小波滤波后的信号减去FFT低通滤波后的信号,得到消除温度影响后的应变变化信号。结果表明:该方法能够有效减小温度与噪声的影响,提高光纤应变监测系统的准确率。It is unavoidable that random noise in optical fiber strain monitoring system and the noise can generate the false warning. In order to eliminate noise data efficaciously and increase accuracy, a new method of early warning is proposed. In the article, first the signal is filtered by Multi-layer wavelet and FFT low pass respectively. FFT low pass can get outline of signal. For purpose of getting the signal of elimination temperature influence, the signal of wavelet fi!.tering subtracts the signal of FFT low pass. The result shows that the method can reduce the influence of the temperature and the noise effec- tively, and increase the accuracy rate of the optical fiber strain detection system.

关 键 词：光纤应变传感器 数据处理 小波滤波 监测系统 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]