Theoretical And Experimental Study Of Close Range Dynamic Target Pulse Laser Rangefinder

At present,pulsed laser ranging is developing in the direction of close distance and rapid measurement.In order to improve the measurement accuracy of dynamic targets,the close-range pulse laser ranging is studied in the way of theoretical analysis and experimental research.The main research contents are:Theoretically,by studying the laser emission process,laser transmission process,laser receiving process and flight time extraction process of close-range high-frequency pulsed laser ranging,close-range high-repetition pulses for static targets and for dynamic targets are established respectively.Laser ranging physical model.A close-range high-frequency pulse laser ranging model for static targets,the laser reflection characteristics of the target surface to be measured,the angle between the target to be measured and the laser ranging,and the theoretical simulation of the distance between the target and the laser ranging.On this basis,the close-range high-frequency pulse laser ranging model for dynamic targets is related to the moving speed of the target to be measured,the laser reflection characteristics of the target surface to be tested,and the initial distance between the target and the laser distance.simulation.In terms of experiments,the system design of pulsed laser ranging includes laser emitting unit,laser receiving unit and laser time extraction unit.The close-range pulse laser ranging system was designed and experimentally studied for static targets and dynamic targets.For the static target,the laser reflection characteristics of the surface to be measured,the angle between the target to be measured and the laser ranging,and the distance between the target and the laser ranging system are related to the experimental research of the laser ranging.For the dynamic target,the moving speed of the target to be measured,the laser reflection characteristics of the target surface to be tested,and the initial distance between the target to be measured and the laser ranging system are tested,and the related ranging algorithm is compared and verified.The results show that the proposed short-range high-frequency pulse laser ranging model for static targets and the rationality of close-range high-frequency pulse laser ranging model for dynamic targets also verify the single-threshold front-phase threshold laser method.The measurement error is large due to the application scenario where the laser echo signal is weak.The multi-threshold pulse laser ranging method is used to correct the error and improve the accuracy of close-range high-frequency pulse laser ranging measurement.