温室计算机分布式自动控制系统的开发

Research and Development of Greenhouse Computer Distributed Auto-Control System

国内外温室种植业的实践经验表明 ,提高对温室的自动控制和管理水平可充分发挥温室农业的高效性。温室计算机分布式自动控制系统 ,基于对同一地区的多个温室进行群控管理的思想 ,由一台 PC主机与多个微电脑控制装置组成的主从式分布结构 ,采用总线式 RS- 4 85通信网络和逐级验证的通信算法进行数据传输 ,通过实时读取和历史存储温室内环境参数值和报警信息来监测温室的运行情况 ,文章讨论的四段变温管理思想可依据专家的经验对温室内温度进行分段精确控制。经现场运行表明该系统能可靠地自动采集数据。

Crop production in domestic and overseas greenhouses shows that advanced automation and management system for greenhouse will improve the efficiency of agriculture production. Based on group control idea for greenhouses in the same zone, greenhouse computer distributed auto control system, which is a kind of principal and subordinate structure made up of one PC and several microcontrollers, principal RS 485 bus communication network and step by step validated algorithms to ensure data transmitted correctly. The local operation in greenhouse can be obtained by monitoring environment parameters and warning information can be read into PC. In addition, the dynamic heating management method discussed will implement accurate control on temperature according to expert experience. The system has been put into use and proved reliable in automatic data acquisition, and at last the paper puts forward a further development trend on this system.