基于無線傳感器網(wǎng)絡的室內(nèi)定位系統(tǒng)研究
[Abstract]:In recent years, with the rapid development of wireless sensor networks, indoor positioning has become a research hotspot in wireless sensor networks. In the indoor environment, it is often necessary to determine the specific location of the device holder or object. However, there are many factors that affect the positioning. It is an important topic to improve the positioning system and explore a more perfect positioning scheme. In this paper, the RSSI positioning scheme based on ZigBee technology is studied and realized. Based on this scheme, the system design requirements are analyzed and the overall design scheme is worked out. The chip circuit design and RS232 serial port circuit design are carried out with CC2430/CC2431 as the core. The design of reference node, blind node and gateway node is realized in the software. The system is tested and analyzed. To some extent, the system meets the requirements of indoor positioning, and has the characteristics of low cost and low power consumption. At the same time, there are some defects in ZigBee positioning system, which depend on reference nodes, and the location is easily affected by complex environment and confined to two-dimensional plane. The system does not establish a trajectory tracking model to track the trajectory of moving objects. In view of the above shortcomings, this paper studies the positioning scheme based on dead-reckoning, analyzes the positioning system from the aspects of system cost and complexity, the dependence of reference nodes, positioning range and location realization, etc. The system is superior to the ZigBee positioning system to some extent, but it has the shortcoming of long time position error accumulation. On this basis, this paper proposes a fusion positioning scheme, that is, the combination of reckoning positioning and ZigBee positioning. Through simulation analysis, the fusion positioning scheme can make up for the shortcomings of the single positioning system and realize the complementary advantages. To provide users with a more complete indoor positioning services.
【學位授予單位】:南京郵電大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:TN929.5;TP212.9
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