基于TDC-GP 2的高速时栅位移传感器信号处理系统的研究∗

摘要

With the industrial development of the time grating displacement sensor, and its trending in the high-speed measurement has became increasingly prominent, we put forward a time grating displacement sensor signal processing system based on TDC-GP2. The system use STM32F4 and AD9958 to generate high-stability,high-preci-sion excitation signal of time grating displacement sensor,use high-resolution TDC-GP2 digital clock converter to measurement induced signal phase time difference,then we put measurement results into the microprocessor process-ing,in order to reach the purpose that time measurement space. The experiments show that 48 pole time grating displacement sensor whole cycle(0°~360°) error reach ±2.3″,the program optimizes the circuit structure and im-prove the measurement accuracy of time grating displacement sensor.%随着时栅位移传感器的产业化发展，高速测量需求的趋势日益凸显，提出了一种基于TDC-GP2的时栅位移传感器信号处理系统。该系统采用STM32F4和AD9958产生时栅位移传感器所需的高稳定、高精度励磁信号，采用高分辨率TDC-GP2数字时钟转换器来测量传感器动、定测头的感应信号相位时间差，将测量结果送入微处理器中处理，以此到达以时间测量空间的目的。经实验表明：48对极时栅传感器整周(0~360°)的误差达到±2.3″，该方案优化了电路结构，提高了时栅位移传感器的测量精度。