基于ARM的直线式时栅位移传感器A/D转换电路设计

Design of A/D Conversion Circuit for Linear Typed Time Grating Displacement Sensor Based on ARM

利用时空转换思想,以时间基准测量空间位移量,设计了基于ARM的直线式时栅传感器A/D转换电路。采用STM32F407VGT6型ARM处理器与AD7298BCPZ型12位A/D转换芯片相结合,利用嵌入式Linux实时操作系统的移植,使得系统具有更好的可靠性与实时性。实验表明:设计的A/D转换电路,最小分辨时间为2.44 ns.能够更好的实现传感器的高速、高分辨率采样,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。

Based on the theory of time-to-space converting,an A/D conversion circuit using ARM processor for the linear typed time grating sensor was designed to measure displacement by time space. For the high reliability and real-time,ARM processor STM32F40VGT6 and 12 bit A/D chip AD7298 BCPZ were used,and embedded real-time operating system Linux was transplanted. Experimental results show that the resolution of the A/D conversion circuit is 2. 44 ns,and the high speed and resolution of sampling is better. It realizes the real-time of correction and compensation for error and provides technical support for high precision linear time-grating sensor.