温室多参数监测系统设计

Design of Multi-parameter Monitoring System in Greenhouse

采用支持ZigBee技术的CC2530芯片作为传感节点和汇聚节点的核心部件,并通过扩展I/O引脚的方法使传感节点外接温湿度传感器、光强度传感器和二氧化碳传感器,满足对温室环境多参数监测的需求,利用时间片调度算法实现了传感节点防碰撞和系统低功耗的设计要求。所设计的汇聚节点通过ZigBee网络,将由传感节点发送过来的数据,发送到网关,网关通过RS232上传到上位机。经测试,系统能够实时可靠地进行无线监测,满足对温室环境多参数的采集、传输和处理的要求,为设施农业复杂环境的精准调控提供了科学依据。

System node has selected CC2530 chip,which supports the technology of ZigBee,as the hardware core of the node device.It has met the requirement of greenhouse environmental monitoring with many parameters by extending I/O pins and externally connecting temperature and humidity sensors,illumination sensors and carbon dioxide sensors,uses time slice scheduling algorithm to meet requirements of anti-collision of a sensor node and the low power of system.Through ZigBee net,link node sends the data,which is transmitted by sensor node,to gateway and gateway sends that to upper computer through RS232.According to the test,the system designed in the paper can have wireless radio communication instantly,meet the demands of gathering,transferring and handling the environmental parameters in greenhouses and offering precise regulation for the complex environment of installment agriculture.