基于小波原理和流体静电信号诊断矿用液压系统故障原理  

The Fault Diagnosis Principle for Mine Hydraulic System Based on Wavelet Principle and Fluid Electrostatic Signals

作　　者：王晓蕾[1] 阚哲[1] 张雷雷 

机构地区：[1]辽宁石油化工大学 [2]抚顺石化工程建设有限公司

出　　处：《辽宁石油化工大学学报》2015年第3期65-68,共4页Journal of Liaoning Petrochemical University

基　　金：辽宁省教育厅一般项目(L2012126)

摘　　要：由于矿用液压系统故障的形式和种类的多样化,因此只能依靠人工经验对故障进行诊断,这在很大程度上制约了矿用液压系统设备的应用。针对液压系统中出现气泡(或气穴)的现象,进行了模拟实验,提出了一种新的测量方法与诊断方法。通过对静电随机信号进行小波变换,在实验和理论分析过程中发现,通过小波变换可以较准确地诊断出液压系统出现气泡的时刻,有利于诊断出液压系统由气泡引起的故障形式。实验结果表明,对静电信号取小波变换的液压系统故障诊断方法是可行的,判断的正确率达到95%左右。Mine hydraulic system fault diagnosis with a variety of forms can only rely on the experience and knowledge,and this restricts the application of the hydraulic system in mine equipments to a large extent.The simulation experiments were made and a new measuring and diagnosis method was proposed aiming at the phenomenon of appearing the cavitation in hydraulic system.Through the wavelet transform of the static random signal,it was found during the experimental and theoretical analysis that the process of using wavelet transform could accurately diagnose the cavitation appearing and cavitation occurs in hydraulic system of the moment,and it was a bigger help for the fault diagnosis of hydraulic system of the form by the cavitation of the oil pipe.The experimental results show that the method of hydraulic system fault diagnosis was feasible with the wavelet transform to the electrostatic signal,and the judgment was correct in about 95%.

关 键 词：液压系统 静电传感器 小波变换 故障诊断 流体静电信号 

分 类 号：TQ031[化学工程] TP206.3[自动化与计算机技术—检测技术与自动化装置]