Software Design And Implementation Of The New Handset In Field Photogrammetric System

This thesis designs and implements work software for the new handset used in field photogrammetric system.Field photogrammetric system mainly consists of three parts:on-site collection points,communication networks and data centers.First,the new handset completes data collection from on-site collection points,then the handset will send data back to the data center through communication network,finally,data center completes data processing.The handset combines determination,positioning attitude,photography,ranging,telemetry,data communication and data processing between the handset and data center.designed software can synchronously completes positioning and attitude determination,photogrammetry,laser ranging,remote telemetry and task of real-time data acquisition and communication in conditions of wild harsh environment.The work of this thesis is as follows:Firstly,the thesis gives an overview of the research status for photogrammetric system,and gives a brief introduction to some of the programming techniques used in software of the handset,which part of the data acquisition uses the API serial communication technology and multi-threading technology,taking into account the requirements of the software on requirement of the handset hardware,data resolving uses the technology of dynamic link library,saving the memory of the handset and improve the operating speed.Secondly,according to the work principle of the handset,designing software workflow of the handset,the thesis gives a brief introduction to overall framework of the field photogrammetric system and focuses on the design of software for the handset,including the data acquisition,the data processing and communication with data center.The design of data acquisition includes the design of the pictures,GPS module,Three-dimensional attitude and laser range,the design of the data processing is in order to achieve the objective coordinate calculation,the design of communication with data center achieve communicate between the handset and the data center.The thesis gives a brief overview of expression and conversion of the GPS data between different coordinate systems.Finally,according to the theory of error propagation,the thesis analyzes the error of the solver model,respectively taking into account influence of the attitude data and ranging data on the solver model,according to the spread of error in the measurement system,gives the error of handset measurement system.Further more,the thesis gives the test of the handheld software,including testing of the handset software and data from the handheld progressed by the data centers.