基于无线传感网络的温室环境低功耗监测系统设计

Design of Low Power Consumption Monitoring System for Greenhouse Environment Based on Wireless Sensor Network

温室环境信息的快速准确获取是设施农业精准调控的基础。文章对温室环境数据监测技术现状进行了分析,提出了基于ZigBee和NB-IoT的温室低功耗无线传感网络环境数据采集系统,阐明了系统硬件选型、技术指标和软硬件结合的低功耗实现方案,通过优化多传感器的任务调度、动态切换和节点休眠周期的自适应设置,从而实现温室环境数据连续监测,延长节点使用寿命。针对室外开阔区域和温室内2种环境中无线信号接收强度、数据传输丢包率与节点传输距离开展单跳组网对比试验,探究温室内无线传感节点间的有效通信距离。对系统进行了实地数据采集试验,并从服务器软件获取数据进行分析,结果表明:系统长时工作状态下使用稳定可靠,可有效满足温室环境监测管理使用需求。

Acquiring data of greenhouse environment rapidly and accurately is the foundation of precision control of facility agriculture.Technique situation of greenhouse monitoring was analyzed in this paper,and a low consumption monitoring system based on ZigBee and NB-IoT was designed.The system includes hardware sensor nodes and remote server software.Sensor hardware structure and technical indicators were presented,and low power consumption design scheme with hardware and software integration was proposed.Aiming at prolonging node lifetime and realizing data monitoring continuity,task scheduling and dynamic switching of the multi-sensor were optimized.In order to explore wireless communication quality,contrast tests were conducted in the open area outside the greenhouse.Curve of wireless signal reception strength and data loss rate between two nodes in signal hop network were given after experimental study.The results of longtime running experiment demonstrated that the system sensor nodes in greenhouse are stable and efficient.