染有白噪声的破茬圆盘刀腐蚀声发射信号的小波分析  

Wavelet analysis of the disc sickle corrosion acoustic emission signals with white noise

作　　者：李宝玉[1] 郭明慧[1] 张伟[1] 杨雪松[1] 

机构地区：[1]黑龙江八一农垦大学工程学院,黑龙江大庆163319

出　　处：《中国农机化学报》2013年第4期92-94,103,共4页Journal of Chinese Agricultural Mechanization

基　　金：教育部高等学校博士点基金(20092305110002)--玉米植质钵育移栽机械关键装置的理论研究;黑龙江省农垦总局"十二五"重点科技攻关项目(HNK11A-05-11)--马铃薯微型种薯播种机的研制;黑龙江省教育厅科研课题(12511359)--免耕播种机破茬刀激光表面强化机理及力学性能研究

摘　　要：针对破茬圆盘刀腐蚀声发射信号的特点,结合小波理论及算法,确定出适合于腐蚀声发射信号小波分析的小波基;同时做了相应实验来验证小波时域-频域局部化特性及其变换的有效性,同时验证它在AE信号处理上的可用性。通过小波变换对信号进行消噪,利用仿真实验证明了算法的正确性,实验结果证明了小波变换对AE信号具有很好的去噪效果。In view of the characteristics of the metal corrosion acoustic emission signals,combining with wavelet theory and algorithm,wavelet basis which was suitable for wavelet analysis of the corrosion acoustic emission signal was determined;at the same time,verifying test was carried out in order to show the time-frequency localization characteristics of wavelet transform and effectiveness of the algorithm,and that its applicability on the acoustic emission signal.The AE signals were de-noised by wavelet multi resolution analysis,and the simulation results verify the algorithm＇s reliability.The experimental results show that the wavelet transform has better denoising effect to the acoustic emission signal.

关 键 词：声发射 小波分析 信号处理 

分 类 号：S223[农业科学—农业机械化工程]