运用FPGA+ARM的直线式时栅传感器的数据采集系统设计

Design of data acquisition system for the linear time grating sensor based on FPGA + ARM

利用时空转换思想,以时间基准测量空间位移量,借鉴国际上先进的位移测量技术手段,设计直线式时栅传感器高速实时数据采集系统。通过先进的RISC机器(Advanced RISC Machines,ARM)对现场可编程门阵列(Field Programmable Gate Array,FPGA)进行管理控制,利用嵌入式操作系统Linux软件编程,在FPGA上构建正弦信号发生器、NIOS_II软核处理器,完成高速数据采集,使系统具有更好的可靠性与实时性。实验表明:采用所设计的高速实时数据采集系统,最小分辨时间为2.44ns.解决了直线式时栅传感器处理速度和数据采集不匹配的问题,实现了直线式时栅传感器的实时误差修正与补偿,为高精度直线式时栅传感器的研制提供了技术支持。

With space conversion theory, high speed real-time data acquisition system was designed based on FPGA and ARM processor with embedded technology. High-speed data acquisition was completed through build sinusoidal signal generator and NIOS_II soft-core processor using FPGA under management control of ARM. Software programming in the embedded operating system Linux enabled the system better reliability and timeliness. Experiments showed that ：the high-speed real-time data acquisition system has made the minimum time resolution of 2.44ns. The problem of processing speed not match data collection of linear time-grating was solved and real-time error correction and compensation of time-grating sensor was achieved, which provided tech- nical support to high precision linear time-grating sensor development.