无线传感器的论文.doc

无线传感器网络作为一项新兴的信息采集技术正日趋成熟，随着硬件成本的进一步降低，其巨大的应用前景正逐渐体现。介绍了现场总线湿度测量系统、数字式湿度测量系统和短距离无线多点湿度测量系统三种系统，并对比系统之间的优缺点。本文采用低电压、低功耗的湿度传感器设计一种湿度信息采集的无线传感器网络节点。将湿度传感模块和数据发送模块都放在一个单片机上，这样可以节省系统开发维护成本。设计节点和组网的时候，节点只负责短距离传输数据，通过多跳的方式，将数据发送到基站上。这样设计可以节省节点能源消耗，增加大规模数据传输距离，提升系统的应用范围。 基于WSN湿度采集节点，采集完数据后，传输到基站上，保证数据的可靠性和实时性。再由节点以多跳的方式把数据传输到基站上，由基站统一传送，大大提高了数据的传输距离。其可支持节点数，大大超越了现有系统所支持的节点数，支持节点的增加和删除，并且自动形成网络拓扑结构，不需要人为的干预。虽然或多或少的会受环境所影响，但是通过实时监控节点状态和WSN所特有的可扩展性，可以第一时间检测出无效节点，可以减少损失。 对远程数据采集和传感器网络组网方案进行了研究和选择，并根据系统应用的要求，提出了层次型的体系结构，无线湿度测量系统的三种层次结构为PC机及监控软件构成的监控中心；由中心控制节点构成的传感器主网和由传感器节点、中继节点、路由节点构成的传感器子网。 关键词 湿度采集 路由协议 监控系统 A study and design of humidity measuring system BASED ON WSN Abstract Wireless sensor networks as a new information collection technology is becoming more mature, with a further reduction of hardware cost, and its great prospect is gradually reflected. Describes the field bus and humidity measurement system, digital humidity measurement system and the short-range wireless multi-point humidity measurement system of three systems, and compare the advantages and disadvantages between the systems. This low-voltage, low power humidity sensor and humidity information to design a wireless sensor network node collection. The humidity sensor module and data transmission modules are on a single chip, so that saves system development and maintenance costs. When the nodes and network design, node is only responsible for short-distance transmission of data, through multi-hop manner, to send data to the base station. This design can save node energy consumption, increased large-scale data transmission distance and enhance system applications. Moisture collecting on WSN nodes, collecting complete data, transmitted to the base station to ensure data reliability and real-time. Then the node multi-hop way to the data to the base station by base station to send a unified, greatly improving the data transmission distance. The number of nodes can support, well beyond the existing number of