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J4  2009, Vol. 43 Issue (11): 2096-2099    DOI: 10.3785/j.issn.1008-973X.2009.11.028
机械工程     
形态滤波方法在振动信号降噪中的应用
张文斌1,2,杨辰龙1,周晓军1
(1.浙江大学 现代制造工程研究所,浙江省先进制造技术重点实验室,浙江 杭州 310027;2.红河学院工学院,机械工程及其自动化系,云南 蒙自 661100)
Application of morphology filtering method in vibration signal de-noising
ZHANG Wen-bin1,2, YANG Chen-long1,ZHOU Xiao-jun1
(1. Zhejiang Provincial Key Laboratory of Advanced Manufacturing Technology, Institute of Modern Manufacturing Engineering, Zhejiang University, Hangzhou 310027, China;
2. Department of Mechanical Engineering and Automation, Engineering College, Honghe University, Mengzi 661100, China)
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摘要:

针对在旋转机械振动信号采集过程中引入的噪声污染和基线漂移等问题,采用形态开-闭和闭-开组合运算对染噪的振动信号进行处理.采用形态滤波方法对振动信号进行降噪处理,无须考虑振动信号的频谱特征.在对信号进行基线漂移校正时,所取直线结构元素的长度为采样信号周期长度的一半即可,但是为了得到更好的效果,可以将结构元素取得长一些.为消除信号中混入的尖峰脉冲干扰,结构元素的长度应该远小于待滤波函数的长度,并大于干扰脉冲的宽度.通过在仿真信号中加入不同的噪声干扰检验形态滤波方法的降噪能力,并将形态滤波方法用于现场信号的降噪处理,处理后的信号较好地保持了原信号的特征,说明该方法具有良好的滤波降噪效果,而且算法简单,便于工程现场的使用.

Abstract:

Aimed at the noise interference and baseline drift introduced during the rotating machinery vibration signal acquisition process, the morphology filtering method was used with the combination of morphological open-closing and close-opening operations. There is no need to consider the vibration spectrum characteristics when using this method to de-noise the corrupted signals. In the processing of baseline drift, the length of structure element would be half of sample datas period. In order to get better effectiveness, the length could be prolonged. While in the processing of pulse noises, the length of structure element must be bigger than that of pulse noises, but it could not be longer than that of original signal. The de-noising capacity of the morphology filtering method was proved by adding different kinds of noises into the simulated signal. The results of this method applied to process practical data showed that the processed signal could keep the main characteristic of the original signal. This filtering method is efficient and convenient for field application.

出版日期: 2009-11-01
:  TN 911  
通讯作者: 周晓军,男,教授,博导.     E-mail: sky@cmee.zju.edu.cn
作者简介: 张文斌(1981-),男,云南建水人,博士生,从事车辆检测与信号处理研究.
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引用本文:

张文斌, 杨辰龙, 周晓军. 形态滤波方法在振动信号降噪中的应用[J]. J4, 2009, 43(11): 2096-2099.

ZHANG Wen-Bin, YANG Chen-Long, ZHOU Xiao-Jun. Application of morphology filtering method in vibration signal de-noising. J4, 2009, 43(11): 2096-2099.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2009.11.028        http://www.zjujournals.com/eng/CN/Y2009/V43/I11/2096

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