文档介绍:PLC&FA2015年2月
基于小波分解的信号降噪方法研究
Research on Signal de-Noising Method Based on Wavelet Decomposition
中北大学电子测试技术国防重点实验室石晓丹冯浩解亚妮
Shi Xiaodan Feng Hao Xie Yani
摘要:本文对热电偶动态标定中红外福射温度计输出信号的降噪方法进行了研究。首先分析了经
典滤波器方法的不足,介绍了小波分析在动态测试信号去矂中的应用;讨论了小波分析的理论基
础、小波基的选择、分解级数和阈值的确定;最后在MATLAB平台下对红外辐射温度计信号进行
了去矂实验。实验结果表明,该方法有效去除了固定频率矂声和高频噪声,而且去矂后信号与原
始信号中有用信号成分是同步的,这对于热电偶的建模分析具有重要意义。
关键闻:小波分析动态校准热电偶去噪
Abstract: In this paper,a noise reduction method for infrared radiation thermometer' s
output signal is studied during dynamic calibration of the thermocouple. The deficiency of
the classical filter method was analyzed firstly, and the wavelet analysis was raised for the
application of the dynamic testing signal theoretical basis of wavelet analysis,
the choice of wavelet