直线式时栅传感器A／D转换电路设计

摘要

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A/D转换电路。采用AD7298 BCPZ型12位A/D转换芯片与STM32F407VGT6型ARM处理器相结合，利用嵌入式操作系统Linux软件编程，使得系统具有更好的可靠性与实时性。实验结果表明：采用所设计的A/D转换电路，最小分辨时间为2．44 ns，能更好地实现传感器的高速、高分辨率采样，实现了直线式时栅传感器的误差修正与补偿。通过，A/D转换电路的设计，为高精度直线式时栅位移传感器的研制提供了技术支持。%By using the space-time transformation thought,we measure displacement on the ba-sis of time,and we design the linear grating sensor A/D converting circuit through learning from international y advanced displacement measurement technology.By using AD7298 BCPZ type 12bit A/D conversion chip combined with type STM32F407VGT6 ARM processor and program-ming on Linux system in an embedded manner,we make the system more reliable and instanta-neous.The experiment shows that the designed A/D conversion circuit whose minimum resolu-tion time is 2.44 ns is more capable of obtaining sensor samples with higher speed and higher resolution,which implements error correction and compensation of the linear time grating sensor. The design of A/D converting circuit provides the technical support for the development of high-accuracy linear time grating sensor.