Study On The Impaction Of Detector Noise On The Accuracy Of Laser Mapping

Because the laser radar either in the military or civilian, both have a very high value,making the current high-tech field of research. To the laser radar detailed study, not onlyneed to create high-quality, high-precision laser radar apparatus, but also on theperformance of the laser radar system analysis and research.Lidar laser pulses compared to the earlier conventional microwave radar whichemits a laser signal, anti-jamming capability, target detection and recognition for highercapacity. Because the laser radar complex work environment and variability, the laserradar receiver system to detect the intensity of the echo signal will higher requirements.Therefore, in order to obtain higher laser radar imaging and ranging from precision, notonly to improve the overall hardware level of laser radar, but also the noise of the laserdetection system for analysis, especially in the received echo signal to noise ratioanalyzes establish SNR and the relationship between the ranging accuracy is better ableto demand choice for precision detectors and laser power.In this thesis, based on the principle of laser radar detectors and stripes, by meansof the theoretical research and analysis to establish a laser radar systems, analysis of thesystem and the system noise and background noise distribution; against striped imageanalysis to establish detection signal to noise ratio and fitting the relationship betweenranging accuracy; through simulation experiments on laser radar system noise analysisand concluded that further signal to noise ratio for the detection and ranging accuracyverification and analysis issues. This laser radar technology development andimprovement of ranging fields of application have a relatively far-reaching significance.This thesis contents and conclusions are as follows:1. A laser radar ranging method is the basic method and the pulse phase method, adetailed analysis of pulse method and derive a range accuracy, analysis of the impact ofreasons ranging accuracy and system noise and random noise type and generationmechanism.2. Through this paper fringe image data extraction, a detailed analysis of thedetector noise impact on the imaging stripes to analyze the noise distribution and impactof the type of noise; emphasis on the based on the principle the detector probe stripesSNR and mapping accuracy relations are analyzed and discussed to identify the quantitative relationship between them; last, the imaging system calibration, draw stripeson the image pixels corresponding relationship with the detection distance.3. Three-dimensional simulation of the experimental conditions are loading platform,through simulation program has once again proven the experimental results, the imageanalysis of the simulation imaging system noise noise distribution and the accuracy ofthe simulation system established detection signal to noise ratio and precision mappingrelationship.4. Through the compution of experimental results, the accuracy requirements ofdifferent laser emitting a single pulse energy of estimates. For further field mappingprovides a reliable basis and theoretical proof.