Research on Phase Difference Laser Ranging System

In order to optimize the phase laser ranging system and improve the accuracy of ranging, a phase laser single frequency and low/high dual-frequency ranging system model are established by Matlab Simulink toolbox based on the modular method. The two distance measurement models are studied and compared, and the circuit complexity is reduced by the method of phase difference detection. The total phase difference between the laser beam and the target is calculated by Full phase fast Fourier transform phase measurement. The single-frequency sine-wave laser ranging and dual-frequency laser ranging are compared. The feasibility of implementing a high precision and fast phase laser ranging system is verified theoretically. Additionally, the effect of signal-noise ratio on the phase measurement accuracy is analyzed. The results show that the accuracy of the phase error is different under the different signal-to-noise ratios., and the influence of SNR on the phase measurement accuracy is different for different ranging methods.