【摘要】 本文叙述了小波变换的原理、性质及算法，介绍了小波变换模的极大值与信号突变之间的关系。最后，沿模极值链成功地把继电器内小颗粒被激振后的瞬时冲击响应信号从背景噪声中提取出来。并作了实验统计来证明其可行性。这对继电器内小颗粒检测系统实现智能化、自动化很有意义。更多还原

【Abstract】 In the paper,the principles,properties,and algorithm of wavelet transform are described Thereafter,the relation between the wavelet transform modulus maxima and the transient part of signal is introduced Finally,along maxima line the impulse response signals of grains inside stimulated relay are extracted successfully from background noises,which is of much importance to realize the automation of detecting system for grains inside relay The feasibility of the method is proved by experiments更多还原