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Research and Application of Localization Technology Based on ZigBee Technology

Author: HePing
Tutor: ZhangLiYun
School: Nanjing University of Posts and Telecommunications
Course: Communication and Information System
Keywords: Wireless sensor networks ZigBee technology Arrival time difference Locate
CLC: TP212.9
Type: Master's thesis
Year: 2012
Downloads: 166
Quote: 0
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Abstract


Wireless sensor network technology can bring convenience to the people's production and life , resulting in a rapid development . ZigBee technology has standardized protocol standard is widely used in wireless sensor networks . ZigBee technology can build a low-cost wireless sensor networks . Determine the location of the nodes in the network information on wireless sensor network technology is of great significance . How to get the exact location of the node convenient become hot research today . Already have some solution to the problem of positioning , for example: RSSI-based positioning based on TOA or TDOA positioning . These positioning technologies have some flaws , solve the problem of positioning of wireless sensor networks still need further research . The location technology in wireless sensor networks . First, the ZigBee technology and wireless sensor networks for positioning problem solutions , highlight the ranging - based localization algorithm . Secondly , the use of different chip crystal oscillator clock frequency offset stability characteristics , combined with TDOA algorithm , one for wireless sensor networks TDOA algorithm proposed in this paper . The positioning algorithm to consider the clock frequency offset between the different chip crystal , the difference in the distance between the time difference convert nodes reached through the measurement signal obtained , thereby performing positioning . The positioning algorithm avoids time synchronization problem in wireless sensor networks , effective solution to the more distant unknown node positioning problem . Finally, by procedures that modify the ZigBee node design localization experiments confirmed using the proposed Poor With the increase in the number of sampling groups based on the distance between the node obtained by the TDOA algorithm stabilized , and can achieve a satisfactory positioning effect the positioning algorithm is stable and feasible . The algorithm has laid a foundation for the future and better positioning in wireless sensor networks .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor > Sensor applications
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