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介绍了小波变换与信号奇异性的关系、判断信号奇异性的“模极大值检测”法则；利用信号和噪声在小波变换尺度上的不同表现，结合矿井主要通风机振动信号的特点，给出了矿井主要通风机振动信号的噪声消除算法，并进行了实例分析。
The relationship between wavelet transform and signal singularity is introduced, and the rule of “modular maximum detection” is analyzed to judge the singularity of signal. By using the different representation of signal and noise in wavelet transform scale and the characteristics of vibration signal of mine main ventilator, The noise elimination algorithm of the vibration signal of the main ventilator in the mine was also analyzed.