摘要:本文开头指出了课题研究的意义、现状及研究目标，接着介绍了频谱分析法、时频分析法和模式滤波法等信号分析新方法和新技术，并对其概念及原理方法进行了阐述。文章通过对钻井泵信号、齿轮信号和轴承信号的分析研究，给出了模式滤波法的信号处理过程及其在工程上的应用，同时描述了模式滤波法的基本原理及对工程信号的处理，还介绍了其分离信号的操作过程。通过CIS-II型齿轮试验台及USOX20016系统组成的信号采集装置测量出齿轮振动信号数据（此处同时介绍了信号采集装置的结构、工作原理和信号数据的采集方法，还有操作过程中的注意事项），利用声振测量数据文件处理应用软件对所得的振动信号数据进行相关处理，并得到相对应的信号频谱。最后，论文通过齿轮故障诊断的实例对工程信号特征参数的变化规律作了初步研究，并针对相应图形作了简要分析，其中还介绍了齿轮局部故障的几种分析方法。

关键词：信号采集；频谱分析；模式滤波法；基元分段；周期确定；信号处理

ABSTRACT: The beginning of this article pointes out the significance of the research, current status and research objectives, followed by spectrum analysis, time-frequency analysis method and mode filtering method ,They are new methods and new technologies of the signal analysis , and describes its concepts and principles of methods . Through the analysis of the drilling pump signals, the gear signals and the bearing signals, the paper gives the signal processing of mode filtering method and its application in engineering, describes the basic principles of mode filtering method and the engineering signal processing and also describes the operation of the separated signals. The CIS-II-type gear test rig and USOX20016 system consists of signal acquisition device .By the device, we measured the gear vibration signal data (at the same time, it attentions the structure of the signal acquisition device , working principle and the acquisition methods of the signal, the matters of  operation process), The sound and vibration measurement data document processing applications deals with the vibration signal data，getting the corresponding signal spectrum. Finally, the paper makes the instance of the fault diagnosis of gears. I make a preliminary study for the characteristic parameters of the engineering signal variation, and write a brief analysis to the corresponding graphics, which also describes the gear partial failure of several analytical methods.

KEY WORDS: signal acquisition; spectrum analysis; pattern filter method; the segmentation of primitive；period ascertaining; signal processing.