低速重载设备微弱故障信号检测系统的研究与开发

发布时间：2018-03-16 11:54

本文选题：低速重载设备　切入点：微弱信号检测　出处：《西安建筑科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：本文针对低速重载设备微弱故障信号检测效果不理想的工业现实问题,结合低速重载设备的运行特点和微弱信号检测技术的基本原理,以小型挖掘机动力臂回转平台回转支承为实验研究对象,提出并设计了一套包含硬件(信号调理模块、DSP模块)和软件(基于Matlab的小波包算法实现)的低速重载设备微弱故障信号检测系统,并通过对回转支承两种故障类型(齿面磨损和齿轮局部异常)的实验数据分析,对比验证了该系统的正确性和优越性。本课题所做的工作主要包括以下几个方面:(1)论述了低速重载设备微弱故障信号检测中存在的问题,并引出了研究和开发低速重载设备微弱故障信号检测系统的重要意义。(2)对典型低速重载设备小型挖掘机回转平台进行了全面的工况分析,选择三轴压电式加速度传感器作为加速度信号采集器件,并提出了信号检测的可行性方案。(3)对检测系统的两大模块进行了详细设计:基于DSP的硬件电路设计(用于信号采集);基于小波包的算法实现(用于信号分析)。(4)进行实验,得出本文所设计系统的正确性与优越性结论。(5)对课题全部研究内容做出总结,并提出了存在的问题、解决的方法、发展的趋势和改进的方向。
[Abstract]:In this paper, aiming at the problem of low speed heavy load equipment weak fault signal detection effect is not ideal, combined with the operation characteristics of low speed heavy load equipment and the basic principle of weak signal detection technology. Taking the rotary bearing of the rotary platform of the power arm of the small excavator as the experimental research object, This paper presents and designs a weak fault signal detection system for low-speed and heavy-duty equipment, which includes hardware (signal conditioning module, DSP module) and software (wavelet packet algorithm based on Matlab). The experimental data of two kinds of fault types of rotary support (tooth surface wear and gear local anomaly) are analyzed. The results show that the system is correct and superior. The work done in this paper mainly includes the following aspects: 1) the problems in weak fault signal detection of low speed heavy duty equipment are discussed. The important significance of researching and developing weak fault signal detection system of low speed heavy load equipment is introduced. (2) the working condition of the rotary platform of typical low speed heavy load equipment small excavator is analyzed comprehensively. The three-axis piezoelectric accelerometer is selected as the acceleration signal acquisition device. The feasibility scheme of signal detection is put forward. The two modules of the detection system are designed in detail: the hardware circuit design based on DSP (used for signal acquisition), the algorithm realization based on wavelet packet (used for signal analysis, etc.). Draw the conclusion of correctness and superiority of the system designed in this paper. Conclusion. 5) summarize all the research contents of the subject, and put forward the existing problems, solving methods, developing trend and improving direction.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU621;TP274

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