针对目前棚室环境监控系统实时性和可靠性差,价格昂贵以及操作复杂等缺陷,开发了基于CAN总线的连栋棚室环境因子集中监测系统.系统采用单片机控制、总线挂接式结构,通过CAN总线实现监测单元与显示控制单元之间的通信.经实际应用验证,该系统能实现多栋棚室环境因子的集中在线监测,监测准确,完全满足设施农业的生产要求,此外系统结构简单、操作灵活,成本低廉,具有很好的实用推广价值.%Aiming at the problems such as: bad real time capability, low reliability, high costs, complicated operation, which exist in greenhouse monitoring system, a centralized monitoring system for multi-span greenhouse is designed based on CAN bus. The system adopts single chip microcomputer control and main bus hanging model structure. The communication mode of the system adopts CAN field bus, fitting with a lot of monitoring nodes. The system overall structure, software and hardware composition, realization of CAN communication are depicted. The practical application indicates that the proposed system succeeded in mass and remote monitoring, and the system can run reliably and is easy to operate, low in cost, so it has extended value for the practical usage.
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