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Research and Implementation of Indoor Positioning Data Visualization Technology

Author: YangMing
Tutor: RaoRuoZuo
School: Shanghai Jiaotong University
Course: Software Engineering
Keywords: indoor positioning data visualization technology gridmethod Astar algorithm
CLC: TN95
Type: Master's thesis
Year: 2012
Downloads: 106
Quote: 1
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Abstract


Visualization is a calculation method of converting abstract symbols intogeometry graphics. In recent years, with the continuous development of indoorpositioning applications, the problem of indoor positioning data visualization isbecoming increasingly prominent. Indoor positioning system require monitoring thelocation which is on vector map of positioning data and display positioning datatrajectory. At the same time, indoor environment is complicated, and has manyobstacles such as walls. The obstacle avoidance problem of the connection betweentwo positioning data point is the urgent problem in the practical application.To address the problems above, in this paper, in the background of the actualproject for medical things based on zigbee technology, based on in-depth analysis ofA* map routing algorithm and vector map visualization technology, to propose aObstacle Avoidance And Visualization Method of indoor positioning data trajectorywhich is on the vector map. And we design and implement a indoor positioning dataObstacle Avoidance And Visualization Framework (IPOAF) . The application of theframework is also discussed. The application shows that the framework is feasible andeffective.Compared to other indoor positioning data visualization system, this paper hasthe following characteristics:(1) Based on the vector map visualization technology and grid method togenerate indoor environmental obstacle model and AStar pathfinding algorithm, thena Obstacle Avoidance And Visualization Method of indoor positioning data trajectorywhich is on the vector map is proposed. The method include: a vector data modelindoor environment is proposed, based on the vector data model, the data isvisualized. Then we make the vector data model generating as a model indoorenvironment obstacles by gird method. Based on the generated obstacles model of theindoor environment, use of the improved A * algorithm, make the indoor positioning data of the trajectory do the obstacle avoidance and display on the obstacle vectormap.(2) An Indoor Positioning Data Obstacle Avoidance And VisualizationFramework (IPOAF) is designed and implemented based on the method. Theframework mainly composed of three modules, namely: vector map operation module,positioning data real-time display module and the history path replay module.Vector map visualization module is mainly responsible for the DWG file readvector map, vector map display, as well as the operation of vector maps. Positioningdata visualization module is mainly responsible for the positioning data access,location of data storage, as well as real time display of positioning data. Historicalpath playback module is mainly responsible for generating the indoor obstacleenvironment and historical path obstacle avoidance display.(3) The IPOAF frame has been used in the an infant security system based onZigbee, the practical application is characterized by: all baby anti-theft tags connect tozigbee network gateway by zigbee wireless sensor network, then connect to thecentral server through the gateway, central server connected to client PC monitoringsoftware. IPOAF framework is applied in the PC monitoring software. Health carecan monitor the baby’s position through real-time PC monitoring software. Theapplication shows that the framework is feasible and effective.

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