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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。
Large-scale rotating machinery condition monitoring and fault diagnosis shall carry out full cycle and synchronous tracking sampling of vibration signals to ensure the accuracy of spectrum and FFT analysis. Therefore, the bandwidth, low frequency response, anti-interference ability, to meet the harsh environment and long-term working conditions need data acquisition is the key. This article describes an intelligent data acquisition, which has the phase-locked double-frequency and synchronous sampling function, amplitude, phase accuracy; and the octave can be flexibly changed as needed. Use it to carry on the data acquisition of the running status of large rotating machinery, which can meet the need of vibration monitoring and fault diagnosis of rotating machinery.