Design Of Indoor Wireless Location And Navigation System Based On PC Platform

This paper studies the architecture of the wireless positioning system suitable for the indoor environment.The research focus on two key technologies facing by key modules for positioning system as the construction of the multi-user indoor wireless positioning platform including the hardware one and the software one,and the generating and loading of the electronic map.First of all,the thesis introduces the research background and significance of the Location Based Service(Location-based Service,LBS)indoor wireless positioning system,Summarizing the existing of a variety of indoor positioning technology and system of the world's development and evolution direction;Aiming at Indoor positioning two key problem of the development of technical problems,includes accurate positioning information collection and calculation,generation and loading electronic map and the construction of the positioning platform;Analysis how to solve these problems including the techical route and the solving ideas;It analyzes the existing four types of positioning information acquisition measurement model and the technical implementation characteristics,comparing and summarizing the differences between the electronic map and the traditional one,at the mean time,this paper analyzes the characteristics of electronic maps and generating method to select using Arc GIS components to develop the GIS system.Subsequently,according to the to the development of the indoor wireless positioning system design requirements,put forward the process of the generation of electronic map in view of the indoor environment,the scheme of how to design the electronic map,mainly includes two key modules as the establishment of spatial geographic information database and the establishment of the spatial index.First it collects the object attribute information of the indoor environment and transforms coordinate,form 3d space coordinates to gauss projection coordinates,then to a plane rectangular coordinates,finally transforming it to the screen pixel coordinates.After that,it will establish the spatial geographic information database and put the geographic information into this Geodatabase built-in Arc GIS according to index created by choosen method.Finally,this article embarks from the user demand for the location of the indoor environment,proposes a scheme for multi-user indoor wireless positioning platform based on the system architecture of indoor wireless location systems requirements,respectively presents the process of scheme of hardware and software including detailed structure,processing steps,as well as the system implementation of the key modules.First analyzed the system's overall hardware architecture,including the selection of distance measurement chip,ranging principle and the realization of the distance measurement;Futher more,according to the positioning software requirements set the function of whole and indoor wireless positioning platform software architecture,design the workflow of the function module including the data module,the positioning module and the communication module using the method of modular technique,as well as completely realizing the key modules and designing the process of the overall system,Using c + + programming language to develop indoor wireless location based on the MFC software platform and complete the function of the system test...