Research On Key Techniques Of High Speed Camera Measurement System For Lunar Probe

Object coordinate measurement with high precision was widely used in aerospace?ship manufacturing?the plan?airship?roads and bridges.Compared to conventional measurement method,Camera measurement is widely used because of the advantages of non-contact high accuracy real-time and full field measurement.In this paper,the large scale motion parameters(position,speed)of the system are measured by high speed camera measurement system?For static measurement system,Field facilities can not be directly completed in the target coordinates calibration camera,The camera calibration is accomplished by the coordinate system of the calibration control points in the target coordinate system.Dynamic measurement system for measuring large scale motion parameters of an object.The direct use of turntable data camera calibration accuracy is not high,Through the verification of the turntable angle,Reduce rotation angle error and Improve the calibration accuracy.Because of the application of the optimal filtering solution to calculate the speed error of this experiment is not meaningful,In this paper,the method of velocity error is derived from the measurement of the intersection of the camera,and the velocity error is close to the actual error.Finally,the model of the scene is changed,and the image model is not satisfied,Put forward the optimized imaging model,the influences of various factors on imaging is analyzed by simulation,verified by field data,results show that the intersection can meet the measurement requirements.The main work of this paper:1.The requirement of large size measurement in industrial application and the development of domestic and abroad are introduced,and the advantages of camera measurement and the feasibility of this test are introduced2.In the experiment of static camera measurement,the test field facilities can not complete the camera calibration in the target coordinate system directly,and the target coordinate system is obtained by the coordinate system.In the process of experiment data processing,according to the experimental conditions,the target tracking process is selected.The appropriate template size and tracking radius are selected.The target tracking is fast and stable.Finally,the experimental results are compared with the experimental results,and the accuracy of the results is proved.3.In the application of dynamic measurement system to measure the motion parameters of the object,the original turntable data is used to calibrate the camera,and the calibration results are badly.The calibration results have been greatly improved by correcting the rotation angle of the turntable.In solving velocity error,the velocity error of the optimal filter is not significant to the actual data.The formula for calculating the velocity error is derived.4.Dynamic measuring system of turntable camera due to camera installation deviated from the center of a rotating shaft,and turntable encoder installation error leading to cannot satisfy the quasi concentric generalized theodolite camera imaging model.Therefore,this paper puts forward the Optimized Generalized theodolite camera imaging model,and the imaging process are derived in detail.The influence of error in the calibration process is analyzed by simulation.Finally,the experimental data,the calibration results and the results show that the accuracy can improve and meet the requirements of the measurement.5.Further research directions of future work are briefly analyzed.