作者：田青1, 刘强1, 王培丞2
作者单位：1. 国防科技大学信息通信学院, 陕西 西安 710106;
2. 电子科技大学自动化工程学院, 四川 成都 611731
关键词：信息与通信工程;环境参数测量系统;无线传感器网络;环境信息
摘要：
基于自主研发成功的ZigBee网络协议栈设计一套应用于无人值守环境下的无线传感器网络环境参数测量系统，由采集节点、汇聚节点和终端控制器组成。系统通过实时时钟控制系统电源通断的低功耗硬件设计方案将采集节点的休眠电流减少至微安量级；通过软件同步设计方案保证系统正常运行的节拍并解决汇聚节点与终端控制器以及采集节点与汇聚节点失联情况的发生，实现路由信息可视化，保证网络拓扑在终端控制器界面上的完整显示。通过单日和一个月测试实验表明：该系统可以精确测量土壤温度，与数字温度计相比，最大偏差绝对值为0.6℃，最大均方根误差为0.43 ℃，单日土壤温度变化趋势也与实际情况一致；在太阳能资源缺少的区域，系统能够实现无人值守环境下土壤温、湿度的长期测量。
Design of unattended measurement system of environmental parameter based on WSN
TIAN Qing1, LIU Qiang1, WANG Peicheng2
1. College of Information & Telecommunications, National University of Defense Technology, Xi'an 710106, China;
2. School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Abstract: A set of wireless sensor network environment parameter measurement system is designed based on the ZigBee network protocol stack which has been successfully developed by the research group. This system is applied to unattended environment and made up of acquisition nodes, the converging node and the terminal controller. This system reduces the collection nodes' current of sleeping mode to microamp level by low powerhardware design of the power on-off mode through real-time clock controlling system. Through the software synchronization design, the system running beat is guaranteed and the problem that the loss of connection between converging node and the terminal controller, acquisition nodes and converging node happens is solved. Through the use of network protocol stack developed by the research group, routing information visualization is realized and complete display of network topology on terminal controller is guaranteed. The system was tested by the experiment of single day and one month. The following conclusions are drawn. This system can accurately measure soil temperature. Compared with the digital thermometer, the most absolute value of deviation is 0.6℃, the most RMSE is 0.43℃, and the changing trend of soil temperature in one day is also consistent with the actual situation. In areas where solar energy is scarce, this system can do long measurement of soil temperature and humidity in unattended environments.
Keywords: information and communication engineering;measurement system of environmental parameters;wireless sensor network;environmental information
2018, 44(6): 87-94 收稿日期: 2018-01-05;收到修改稿日期: 2018-03-09
基金项目:
作者简介: 田青(1976-),男,陕西汉中市人,讲师,从事通信网络组织与运用、传感器网络自组网、组网效能评估等研究。
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