基于FPGA多路时栅位移传感器数据采集与处理系统

摘要

To solve the problem of interfere when multiple time grating sensors work cooperatively and reduce the complexity of data acquisition, using time-sharing excitation, time-sharing acquisition and queuing to send data , this paper designed an FPGA-based high-precision time-sharing excitation circuit , acquisition circuit and state machine serial transmission circuit .Using QUAR-TUS Ⅱ9.0 development platform , then logical analyzed in the logic analyzer SignalTap Ⅱ, we built two time grating sensors ex-perimental platform .Experimental results show that the use of the method time-sharing excitation and time-sharing making the ac-quisition accuracy of the sensor from the original ±3”up to ±1”, which can effectively solve the multi-sensor mutual interference .%为解决多路时栅传感器协同工作而相互干扰的问题，减少多路传感器协同工作时数据采集的复杂程度。用分时激励、分时采集和排队发送数据来消除多路传感器相互影响的思想，设计了基于FPGA的高精度分时激励电路、采集电路和串口发送电路。利用QUARTUSⅡ9．0开发平台，用SignalTap Ⅱ进行逻辑分析，并通过两个时栅位移传感器搭建试验平台。试验表明，采用分时激励和分时采集的方法，传感器的精度从原来的±3″提高到±1″，可以有效解决多传感器相互干扰的问题。