信号去噪阈值与阈值函数的取舍研究  

THE STUDY OF THRESHOLD AND THRESHOLD FUNCTION IN BLASTING VIBRATION SIGNAL DE-NOISING

作　　者：李永刚[1,2] 赵春风[1,2] 徐国元[3] 

机构地区：[1]同济大学岩土及地下工程教育部重点实验室,上海200092 [2]同济大学地下建筑与工程系,上海200092 [3]华南理工大学土木与交通学院,广州510641

出　　处：《低温建筑技术》2010年第7期46-48,共3页Low Temperature Architecture Technology

摘　　要：为了提高爆破振动信号精度,采用小波阈值去噪方法对爆破振动信号进行去噪,在去噪过程中阈值与阈值函数的选取是关键,阈值与阈值函数选取的合适与否将直接影响到消噪的效果。研究结果表明:heursure和sqtwolog两种阈值的去噪效果比较好;软阈值函数较硬阈值函数有更好的去噪效果。In order to improve the accuracy of blasting vibration signals, the wavelet threshold denoising method was used to de-noise blasting vibration signals, the selection of threshold and threshold function were very important in process of de-noising, which will influence the result of de-noising. The results showed that the better de-noising result might be obtained by heursure and sqtwolog; soft threshold function was better than hard threshold function in the result of de-noising.

关 键 词：爆破振动 阈值 阈值函数 

分 类 号：TU751.9[建筑科学—建筑技术科学]