A delay line interpolation time interval measurement technique based on Lidar system

In Lidar system, time interval measurement technology is the key to achieve high precision time frequency transmission and ranging. By measuring the signal duration, arrival time and pulse width of communication equipment, more accurate time interval data can be obtained. However, the traditional time interval measurement method has some problems, such as low accuracy, difficulty in maintaining long working time and complicated design. Based on the Lidar system, this paper presents a delay line interpolation time interval measurement technology suitable for Lidar system distance measurement by analyzing the advantages and disadvantages of various time interval measurement techniques. The method has the advantages of small measurement error, high precision, stable and efficient, and simple design. Through the error analysis, it can be seen that the final test error of delay line interpolation time interval measurement technology based on Lidar ranging system is 90ps, the resolution is 50ps, and the corresponding minimum range resolution is 15mm.