Abstract:

According to the analysis of time difference measurement by the method of TimetoDigital Converter (TDC),a highprecision time difference measurement system based on the general TDC module TDCGP2 is designed.The measurement range of the system is 0~18 μs and the precision can reach 70 ps.The system has effectively solved the problem of highprecision time difference measurement in application of laser ranging and LIDAR.

Key words: TDCGP2;highprecision time difference measurement system;laser ranging;system design