The Error Analysis And Research In The Multisystem And Integration Of Photogrammetry System

Spatial geographic information becomes more and more important to people with the development of social economy and science and technology.The quality of spatial geographic information is closely related to the accuracy of the spatial geographic information data while spatial geographic information data acquisition is derived from the measurement of surveying and mapping instruments.Now the commonly used surveying and mapping instruments include electronic theodolite,total station surveying,etc.The technology of these instruments is relatively mature and the measuring principle is more traditional.However,they are generally suitable for short distance,low accuracy of measurements.If the high precision measurement is needed to conducted,the cooperative targets are needed to set up to meet the requirements simultaneously.But a lot of places can't establish cooperative target in the actual measurement.Therefore,above surveying and mapping instruments not only have been unable to meet the demand for long distance and high precision measurement,but also not suitable for field measurement in a complex environment because of the limitations of traditional measuring principle and measuring method.Given the above situation,our project team independently designed and developed the multisystem and integration of photogrammetry system.The system is a new measurement system including location,attitude,distance,photography,multi-network integration communication,automatic target,homing to the north,the automatic computation.the working principle of the system is as follow:Firstly,obtain the distant target image information by using the high power telescopes and CCD imaging system;Secondly,obtain the relevant information of station and object space by GPS,attitude acquisition system and the laser ranging system;Thirdly,obtain the three-dimensional coordinates of the target information using embedded high-speed microprocessor to analyze and calculate the above data.The multisystem and integration of photogrammetry system has a promising future in the engineering survey,geological disaster warning and so on.The analysis and research of the characteristics,structure and working principle independently designed and developed by our project team in this paper are as follow:(1)The characteristics,structure and working principle of the characteristics,structure and working principle are briefly introduced.And the causes of measurement errors are analyzed according to the system structure and the whole working principle.(2)Several the main factors of measuring errors(GPS error,posture error,north error)are discussed in detail.Through analyzing the working principle of this system,its errors are analyzed used the survey adjustment theory.The method of reducing the error are analyzed and summarized according to the relevant data.(3)According to the characteristics of the project,the paper analyzes the error of the transverse structure,puts forward error correction scheme,which can provide some references for matching project coordinate.(4)The influence of above errors on the the final measurement results is comprehensive analyzed.The theory of error ellipse and hypothesis testing system for comprehensive test has been put forward in this paper.