A Study Of High Precision Pulse_Phase Laser Ranging System Based On All_Phase Spectral Analysis

With the current project for the movement of large equipment location measurement indicators have become increasingly demanding, high-precision position and distance measurement needs more and more attention. The current mainstream applications ranging technology and instrument often subject to various restrictions(such as range, accuracy, etc.) when applied to a actual project. Foreign Laser Station instruments, such as the surveying instruments Leica TS30 ranging accuracy has reached 0.6mm±1ppm, but for special occasions for a large range of equipment that require high precision, existing rangefinder is still inadequate.This thesis proposes a ranging program on the basis of theoretical study and simulation of practice, which enables 300 m above range, accuracy within 0.3mm and the sampling rate is not less than 100 k Hz requirements. The program uses a Pulse-phase type ranging system, which for the simulation analysis and comparison of the simulation results, then Analyze the feasibility of the program. Provide theoretical and technical reference for the development of long-range precision distance measurement ranging method and meet the new requirements. The main work completed are:1, Introduce the current status of laser ranging, the current principle of a typical laser measurement method are introduced, comparative analysis of their advantages and disadvantages, combining the advantages of the pulse method and phase method in the ranging system is proposed based on the combination of pulse phase wears laser ranging new program.2. Analysis of key technologies to achieve pulse-phase type Laser Ranging. Focused pulsed coarse portion and implementation phase method measuring portion thin and implementations used in measuring the timing and related key technologies. Implementation combine coarse and fine two-part test finalize the overall system solutions.3. The overall system solutions in the signal flow direction, analytical errors that may affect the accuracy of error sources, for laser transmitting and receiving the air caused by the refractive index and phase measurements, presented to the refractive index of air and the phase measurement section asynchronous sampling both Improve.4. The pulse phase type laser ranging system ranging accuracy of the key factors in the decision is the phase error, using MATLAB simulation to prove their performance phase. The overall system flow using Simulink simulation analysis to verify the feasibility of the laser satisfaction analysis program and on topics ranging needs.