无线测温网络中RFD模块的设计无线测温网络中RFD模块的设计.doc

无线测温网络中RFD模块的设计 摘 要 无线传感器网络（WSN）ZigBee技术进行介绍后，通过与其它无线通信技术的对比，说明ZigBee技术更适合应用于无线传感器网络。然后，详细介绍了低功耗的基于ZigBee技术的无线传感器网络节点的硬件设计。接着对动态功率管理（DPM）的节能策略在所开发节点上的应用进行了说明。 硬件的低功耗设计以及动态功率管理在节点上的应用，使节点的平均工作电流 Design of RFD Module in ZigBee Thermometric Network Abstract Integrated with modern wireless communication technology, micro-sensor technology and network technology, WSN has wide application foreground and became the current RD hotspot at IT. Due to limitation of power supply for the nodes as well as the complexity of battery replacement, energy conservation becomes a key problem in WSN. One branch of WSN based on the ZigBee technology, with its advantage in low-power, low-cost and low-complexity is being paid a high degree of attention to. Hence this paper introduces the research on energy efficiency technology for ZigBee-based Wireless Sensor Networks. Within this paper, we discussed WSN with a mainly focusing on energy efficiency technology. Firstly, beginning with a brief introduction of ZigBee technology and a comparison of it with other wireless communication technologies, we proved that it is more suitable for WSN. Secondly we introduce the hardware design of low-power node of ZigBee-based WSN. Then, we explain the application of energy-saving technique-Dynamic Power Management (DPM) on our nodes. The hardware design of the low power consumption and dynamic power management on a node of the application, make the average working current node reached 0.5246 mA. In practical application, 3.7 V 20AH battery can achieve the working days for 1588.459 days. Key Words: Wireless Sensor Network; ZigBee; node; Energy Efficiency; DPM 目 录 引 言 1 第1章 概述 2 1.1 研究背景及意义 2 1.1.1 无线传感器网络 2 1.1.2 ZigBee技术 3 1.1.3 温度测量技术概述 4 1.2 国内外研究现状及存在的问题 5 第2章 ZigBee技术 7 2.1 ZigBee协议简介 7 2.2 ZigBee协议结构 8 2.2.1 物理层 8 2.2.2 MAC层 10 2.2.3 网络层 12 2.2.4 应用层 12 2.3 ZigBee技术应用于WSN的优势 13 第3章 RFD硬件系统设计及其低功耗分析 15 3.1 硬件低功耗技术综述 15 3.2 节点各部分设计及功耗分析 15 3.2.1 CPU能耗分析与节能设计 16 3.2.2 无线通信模块