Abstract: The demand for wireless location application is increasing rapidly，so it is important to research the location application of wireless sensor networks.This paper first introduces the hardware and software architecture of the location system based on wireless sensor networks，and then selects the operation mode for mobile nodes after analyzing their energy consumption，communication traffic，and reliability，and provids some measures for beacon nodes to speed-up their networks buildup，and to improve the communication efficiency and linkage stability of the networks，finally presents the sensor node’s program structure and implement in TinyOS environment，and the implement of the improved weight-centralized location algorithm on the server.

摘要： 无线定位应用需求日益增长，研究无线传感器网络的定位应用具有重要意义。首先介绍基于无线传感器网络的定位系统的软硬件结构，然后从能量消耗、网络通信量和可靠性等方面来分析和选择移动结点的工作方式，并提出了使信标结点实现动态快速组网、提高网络通信效率和通信链路稳定性等所采取的措施，最后给出了在TinyOS下传感器结点的程序结构和实现，以及在服务器端实现的改进的加权质心定位算法。