大型旋转机械振动信号数据采集器的研究  

Research of a data acquisition system of vibration signal for largescale rotating machine

作　　者：徐峰[1] 王志芳[1] 傅尚新[1] 

机构地区：[1]清华大学精密仪器与机械学系

出　　处：《清华大学学报（自然科学版）》1998年第6期111-114,共4页Journal of Tsinghua University(Science and Technology)

摘　　要：大型旋转机械状态监测及故障诊断须对振动信号进行整周期和同步跟踪采样，确保频谱、ＦＦＴ分析的准确性。因此频带宽、低频响应好、抗干扰能力强、满足恶劣环境和长期工作条件需要的数据采集器是关键。本文介绍了一种智能型的数据采集器，它具有锁相倍频和同步采样的功能，幅值、相位精度高；并且倍频数可以根据需要灵活地改变。用它进行大型旋转机械运行状态的数据采集，可以满足旋转机械振动监测和故障诊断的需要。Condition monitoring and fault diagnosis for a largescale rotating machine should process wholeperiod and synchronous sampling to ensure the accuracy of FFT analycis. Therefore a data acquisition system that has a wide frequency band, good lowfrequency response, and high resistance and can be used to serious conditions for a long time is important. An intelligent data acquisition system is introduced. It can process wholeperiod and synchronous sampling, the accuracy of amplitude and phase is high. The multifrequency can change freely. Using it for the largescale rotating machine condition monitoring can satisfy the need for condition monitoring and fault diagnosis.

关 键 词：数据采集 故障诊断 旋转机械 机械振动信号 

分 类 号：TH113.1[机械工程—机械设计及理论] TH165.3