摘要
分析了破茬圆盘刀点蚀声发射信号及小波变换的特点,以说明小波变换是适合于点蚀声发射信号处理的一种方法。利用小波的多分辨分析对声学信号中参杂的噪声进行抑制,使声发射数据满足"规则化"的要求;同时为减少声发射点蚀实验对环境的依赖发挥重要作用。实验结果证明小波分析对声发射信号具有良好的去噪效果。
The acoustic emission signal characteristics of pitting corrosion on the cut-stubble disc sickle and the characteristics of the wavelet transform have been analyzed. The purpose was to illustrate that the wavelet transform was suitable for pitting corrosion acoustic emission signal processing. Using wavelet multiresolution analysis, noise in the acoustic emission signals was suppressed. This made the acoustic emission data meet the requirements of ＂regularization＂. At the same time, it would reduce dependence on the environment in the corrosion experiment of acoustic emission. The experimental results showe that wavelet analysis of acoustic emission signal had a better de- noising effect.
出处
《科学技术与工程》
北大核心
2013年第14期3983-3985,共3页
Science Technology and Engineering
基金
教育部高校博士点基金(20092305110002)
黑龙江省农垦总局科技计划项目(HNK10A-09-02-04)
黑龙江省农垦总局"十二五"重点科技攻关项目(HNK11A-05-11)
黑龙江省教育厅科研课题(12511359)资助
关键词
破茬圆盘刀
点蚀
声发射
小波消噪
cut-stubbble disc sickle pitting corrosionacoustic emission wavelet denoising
