Having good time-frequency localization character, and correctly identifying singularity point in fault signal, Wavelet is the main analysis method in this paper.
小波变换具有良好的时频局部性，具有变焦距的特点，对故障信号中的奇异点能够准确识别，是论文中应用的主要分析方法。
Based on the analysis of main fault types of LV (Low Voltage) flameproof motor, the negative sequence protection principle is proposed for its asymmetric short circuit fault and open phase fault.
通过分析低压隔爆电动机的主要故障类型，针对不对称性短路故障和断相故障提出了采用负序保护原理进行保护的方案。
The paper introduces the main contents and the method of the fuel analysis technique and puts forward the technical scheme for monitoring and fault diagnosis which is realized in coal mine machinery.
介绍了油料分析的主要内容和方法，提出了实现煤矿机械设备状态监测和故障诊断的技术方案。
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