A signal processing system of time grating displacement sensor based on MCU STM32F4 is designed.It integrates the signal acquisition and data processing

drive power and error compensation on one chip

and develops design of driving source with DDS. By the means of input capture

for high frequency clock pulse interpolation to collect measurement signals. This system manages to complete data computation in a one-cycle DSP instruction part integrated by chips and error correction with harmonic correction techniques of Fourier series.Experiment indicates that the 72 pairs polar time grating error peak-to-peak value is only 3. 29″

since this system is adopted

which ensure precision at the same time achieve integration and miniaturization of time-grating signal processing system and reduce the cost.