Please wait a minute...
J4  2009, Vol. 43 Issue (11): 2096-2099    DOI: 10.3785/j.issn.1008-973X.2009.11.028
    
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)
Download:   PDF(1110KB) HTML
Export: BibTeX | EndNote (RIS)      

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.



Published: 01 November 2009
CLC:  TN 911  
Cite this article:

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.

URL:

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


形态滤波方法在振动信号降噪中的应用

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.

[1] 崔屹. 图像处理与分析:数学形态学方法及应用[M]. 北京:科学出版社, 2000.
[2] 郭景峰,申光宪,郑绳楦,等. 数学形态学在数字滤波中的应用研究[J]. 机械工程学报, 2002, 38(10): 144-147.
GUO Jing-feng, SHEN Guang-xian, ZHENG Sheng- xuan, et al. Application of mathematical morphology in digital filter [J]. Chinese Journal of Mechanical Engineering, 2002, 38(10): 144-147.
[3] 岳蔚,刘沛. 基于数学形态学消噪的电能质量扰动检测方法[J]. 电力系统自动化, 2002, 26(7): 13-17.
YUE Wei, LIU Pei. Detection of power quality disturbances based on mathematical morphology (MM) filter [J]. Automation of Electric Power Systems, 2002, 26(7): 13-17.
[4] 安连锁,胡爱军,唐贵基,等. 采用数学形态滤波器的轴心轨迹提纯[J]. 动力工程, 2005, 25(4): 550-553.
AN Lian-suo, HU Ai-jun, TANG Gui-ji, et al. Purification of rotor centers orbit with mathematical morphology filters [J]. Journal of Power Engineering, 2005, 25(4): 550-553.
[5] 胡爱军,唐贵基,安连锁. 基于数学形态学的旋转机械振动信号降噪方法[J]. 机械工程学报, 2006, 42(4): 127-130.
HU Ai-jun, TANG Gui-ji, AN Lian-suo. De-noising technique for vibration signal of rotating machinery based on mathematical morphology filter [J]. Chinese Journal of Mechanical Engineering, 2006, 42(4): 127-130.
[6] 唐贵基, 王维珍, 胡爱军, 等. 数学形态学在旋转机械振动信号处理中的应用[J]. 汽轮机技术, 2005, 47(4): 271-272.
TANG Gui-ji, WANG Wei-zhen, HU Ai-jun, et al. Mathematical morphology and its application in processing rotating machinery vibration signals [J]. Turbine Technology, 2005, 47(4): 271-272.
[7] MARAGOS P, SCHAFER R W.Morphological filters. Part I: Their set theoretic analysis and relation to linear shift invariant filters [J]. IEEE Transactions on ASSP, 1987, 35(8): 1153-1169.
[8] MARAGOS P, SCHAFER R W.Morphological filters. Part II: Their relation to median,order-statistic,and stack filters [J].IEEE Transactions on ASSP, 1987, 35(8): 1170-1184.
[9] STEVENSON R L, ARCE G. Morphological filters: statistical and further syntactic properties [J]. IEEE Transactions on Circuits and systems, 1987, 34(11): 1292-1305.
[10] 唐常青,吕宏伯,黄铮,等.数学形态学方法及其应用[M].北京:科学出版社,1990:110-114.
[11] SERRA J. Morphological filtering: an overview [J].Signal Processing, 1994, 38(1): 3-11.
[12] 曹玉珍,张波,黄玉玺,等. 数学形态学滤波器的工程设计与实验研究[J]. 天津大学学报, 2006, 39(2): 245-249.
CAO Yu-zhen, ZHANG Bo, HUANG Yu-xi, et al. Engineering design and experiment of mathematical morphology filter [J]. Journal of Tianjin University, 2006, 39(2): 245-249.

[1] XIANG Nan, ZHAO Hang-fang, GONG Xian-yi. Improper complex-domain state-space filtering[J]. J4, 2014, 48(4): 727-733.
[2] YANG Li, ZHU Zhu, LIU Ji-lin. Bird’s-eye panoramic view algorithm for vehicle’s embedded system[J]. J4, 2014, 48(2): 292-296.