The Error Analysis And Research In A New Type Of Field Photogrammetric System

In recent years,the development of science and technology has led to the development of surveying instruments.According to the equipment can be divided into the electronic theodolite industrial measurement system,total station polar coordinate measurement system,the system of close-range photogrammetry and laser tracking measurement system.Most of these mapping instruments can only be used in the short distance measurement,and in order to achieve the high accuracy they need cooperation objectives,besides they are not easy to measure in the field of complex environment.In view of the existing problems in the above surveying instrument,this new type of photogrammetric system is a self-developed measurement system.It integrates a laser ranging,three-dimensional attitude measurement and control,global positioning,servo system,photography,and embedded microprocessor.It uses high magnification telescope to aim at the long-range target automatically,and it uses the laser range finder,GPS and microprocessor to calculate the three-dimensional coordinates of the target.And the data can be uploaded to the central computer in order to achieve the integration features of inside and outside.The super field measurement system can be widely used in the field of engineering surveying,deformation monitoring,military field.This paper puts the independent research and development field photogrammetric system as the research object.The paper mainly analyzes the system errors in the design and development stage,including the angle measurement error,the range error,the inner orientation and the outer orientation.And according to the principles of the error generated,the paper analyzes the error correction for each error factors,and obtains the error correction model.Finally,by using of the theory of the error ellipse model,this paper establishes a comprehensive test model of the super field measurement system.Innovation of this paper:(1)Analyze the error of a new type of photogrammetric system.(2)Build the error correction model of the ranging error,angular error,and analysis the inner orientation and the outer orientation.(3)Propose an approach using of error ellipse model theory to integrate test system.