Application of Multiwavelet Threshold Function In Broken Wires Signals of Wire Ropes Detection

摘要：

The drop of safety performance of wire ropes is mainly caused by broken wires. But broken wires signals are too weak to be detectad. On the basis of introduction of multiwavelet theory and analysis of existing problems of traditional multiwavelet threshold functions, a novel multiwavelet threshold function was proposed and its mathematical characteristics were discussed in detail. It adopts slowly variation compression strategy to the wavelet coefficient which is greater than the threshold, the compression amount decreases as the wavelet coefficient increases. The improved function was applied to noise reduction of broken wires signal, and its effect was compared with traditional multiwavelet threshold function. Experiment results indicate that, by using this threshold function, the reconstructed broken wires signal has a high Signal to Noise Ratio (SNR), and all the small broken wires signal can be detected, thus prove the validity and superiority of the function

关键词： broken wires wire ropes multiwavelet transform multiwavelet threshold de-nosing threshold function singular points of signal

作者: XIA Guorong XU Zhisheng ZHAO Wangda

作者单位: School of Civil Engineering and Architecture of Central South University,Changsha 410075,Hunan,China School of Civil Engineering and Architecture of Central South University,Changsha 410075,Hunan,China

会议类型: 国际会议

会议名称: The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)

会议地点: 北京

会议语种:英文

页码: 1927-1930

在线出版日期: 2008-09-24（万方平台首次上网日期，不代表论文的发表时间）