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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。
This paper describes the principle, properties and algorithms of wavelet transform, and introduces the relationship between the maximum value of wavelet transform and signal mutation. Finally, the instantaneous impulse response signal after the small particles in the relay is excited is successfully extracted from the background noise along the mode extreme value chain. And made experimental statistics to prove its feasibility. This relay small particles detection system to achieve intelligent, very meaningful automation.