基于WSN的医院病房环境监测系统

Environmental Monitoring System of Hospital Ward Based on WSN

本文基于WSN技术成功设计实现了一套医院环境监测系统,该系统采用TI公司的CC2530为核心芯片形成传感节点和汇聚节点,传感节点采集医院环境相关参数,包括温度、湿度、光照参数,节点之间应用ZigBee技术实现自组织网络,通过单跳或多跳的方式向汇聚节点传输数据,最终由汇聚节点将数据上传到监控中心。数据传输可靠性是无线传感器网络设计和实现中的一个关键问题,本文基于度约束最短路径树(DCSPT)算法设计了网络拓扑和路径选择,该算法对每个节点的子节点数量进行约束,可以有效减少“热点问题”发生,同时网络提供多路径传输并且使传输路径最短,通过网络的平均跳数、网络健壮性、数据成功传输率等指标对网络拓扑性能进行评估。通过实验测试表明以WSN技术形成的医院病房环境监测系统,实现了无线自组网数据传输,具有系统性能稳定、可靠性强、易于扩展和维护,较好地满足了使用要求。

In this paper, a set of hospital environmental monitoring system based on WSN technology is suc-cessfully designed. The system uses CC2530 TI as the core chip to form sensor nodes and sink nodes, sensor nodes to collect hospital environmental parameters, including temperature, humidity, light parameters, the application of ZigBee technology to achieve self-organizing network, through single hop or multi hop to the sink node transmission data, and ultimately the data uploaded to the control center. Data transmission reliability is a key problem in wireless sensor network design and implementation. Based on the degree constrained shortest path tree (DCSPT) algorithm, this paper designs the network topology and path selection. The algorithm can effectively reduce the “hot issue”, at the same time, the network provides multi path transmission and the transmission of the shortest path, through the network average hop number, network robustness, data transmission rate index in the topology of the network performance is evaluated. The experimental results show that the WSN technology is used to realize the data transmission of wireless ad hoc network, which has the characteristics of stability, reliability, easy expansion and maintenance, and can meet the requirements of the application.