【作者】 宋光明； 陈寿如； 吴从师；

【Author】 Song Guangming Chen Shouru Wu Congshi( College of Resource, Environment and Civil, Central South University, Changsha 410083; College of Changsha Communication, Changsha 410002)

【机构】 中南大学资源环境与建筑工程学院； 长沙交通学院；

【摘要】 爆破振动信号具有持续时间短、信号突变快等特征,小波分析技术在多尺度变换、信号奇点检测方面的应用较为适合对爆破振动信号的分析。小波基函数应当根据爆破振动特征及其分析应用目的来进行选择和构造。选择的Daubenchies小波系列对于进行爆破振动波形的离散变换及重构具有较高的精度;根据爆炸冲击脉冲作用于二阶弱阻尼振动系统的响应函数构造的小波基函数进行微差起爆延时间隔的精确定位具有良好的效果。更多还原

【Abstract】 According to the blasting vibration signal with a short continuance and a fast break, the analysis of wavelet transform is suitable for the signal processing of blasting vibration on multiresolution analysis and singularity detection. Wavelet base must be selected or constructed depending on the character of blasting vibration and the analysis aims. The discrete time wavelet transform and reconstruction of vibration waveform, with Daubechies wavelet series selected, take on higher precision through a case research. The precise locating, with the exponential attenuation wavelet base constructed by means of the response function induced by blasting pulse to 2 - order underdamp vibration system, take on good effects.更多还原