The Development And Miniaturization Of Pulsed Semiconductor Laser Rangfinder With 300m Ranging

Based on the comprehensive analysis of the research status of the laser rangefinder at home and abroad,and fully considering the technique requirements and the range finding theory, the development and miniaturization of pulsed semiconductor laser rangefinder using the time of flight (TOF) theory is completed. The main work and innovation include:a) The module for measuring time of flight is designed based on the tap delay interpolation techniques. In temperature range -40℃to +60℃, the measurement precision can reach 1ns precision;b) The PCB for the laser emitting, laser receiving and signal processing is designed, and the embedded software system is implemented.c) The algorithms for detecting sensitivity automatic adjustment and the distance data statistics are researched, laser rangefinder’s ability of anti-disturbance of sun light is improved, and the problem that measuring range cannot meet requirement under the condition of volume constraint is solved, and so the measuring distance can meet 300 meters;e) The integration of laser rangefinder is completed, the experiments including optics test, whole system test. The experimental results show that laser rangefinder designed in this paper can satisfy the research requirements.