Multiple Time Grating Sensors Data Acquisition System Based on FPGA
Wang Xian-qua · Yibiao jishu yu chuanganqi · 2015
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 QUARTUS Ⅱ 9. 0 development platform,then logical analyzed in the logic analyzer Signal Tap Ⅱ,we built two time grating sensors experimental platform. Experimental results show that the use of the method time-sharing excitation and time-sharing making the acquisition accuracy of the sensor from the original ± 3up to ± 1,which can effectively solve the multi-sensor mutual interference.