2D阀电液激振器数据采集及实时分析系统

Data acquisition and real-time analysis system of the electro-hydraulic vibrator based on 2D valve

电液激振器采用2D阀控制液压缸实现高频振动,通过控制阀芯的转速与阀芯的轴向位移来控制激振器的激振频率和幅值.采用数据采集卡在Delphi编程环境下对激振力与位移波形的数字信号进行高速采集,同时波形在工控机的屏幕上显示,并对采集的信号进行频谱分析.设计的此系统,在保证精度的条件下,具有较高的采样频率,满足实时采集、实时显示和实时分析的速度要求,具有编程容易、数据采集可靠及频谱分析准确等特点.

In the electro-hydraulic vibrator, 2D valves are used to control hydraulic cylinder to achieve high-frequency vibration. The vibration frequency and amplitude are controlled by the speed and axial displacement in the spool valve core respectively. The vibration-exciting force signals and the displacement signals are acquired by data acquisition card under Delphi development. Meanwhile, waveforms are displayed on the industrial control computer and real-time spectrum analysis is implemented. Under the condition of guaranteeing the accuracy, this system is designed with higher sampling frequency to meet the real-time data acquisition. This system is of some advantages, such as ease programming, reliable data acquisition, exact spectrum analysis and so on.