摘 要
景观温室是一种配备有温室环境控制系统的资源集约型高效农业生产方式,它在调控温室内小气候环境以适应作物生长发育要求的同时,不仅实现了作物的反季节生产,还提高了作物的质量以及作物生产的效率。近年来随着传感器技术、计算机技术、网络技术、智能控制技术以及生物技术等高新技术和手段的飞速发展,带来了温室环境控制方面的一场革命。温室环境控制系统正在不断吸收相关领域新的理论和方法,结合温室作物种植的特点,不断创新,逐步完善。
本论文首先介绍了国内外温室环境控制系统的研究发展状况,总结了温室环境控制系统的发展趋势,分析了现有温室环境控制系统存在的不足。温室环境控制的目的是把各被控变量(温室环境因子),如光照、温度、湿度、CO2浓度等,维持在作物生长发育要求的范围内,所以本论文还分析了各环境因子对作物生长发育的影响以及各环境因子之间的相互耦合关系。其次根据工控领域发展迅速的现场总线模型提出了AFCS(Agricultural Field Bus Control System)参考模型,并由此得出分布式温室控制系统的物理模型,然后在上下位机结构形式的基础上对温室控制系统进行了软硬件设计。最后利用工控领域优秀的控制软件组态王(KingView6.5)编写了温室模拟运行软件,利用该软件可以对温室进行参数设置,报表、曲线查询,报警提示等。
关键词:景观温室,环境因素,现场总线,分布式控制,组态软件
Abstract
The ornamental glasshouse is a kind of high efficient and intensive production mode that equipped with the glasshouse environment control system. It adjusts the microclimate of greenhouse in order to adapt to farm crop growth request.At the time it not only carries out the anti-season.production of the farm crop,but also raises the productin effciency.In recent years along with the spread of high new techniques,such as sensor technique, calculator technique, network technique, the intelligence control technique and the living creature technique,it brings a revolution of glasshouse environment control. The glasshouse environment control、system is absorbing the new theories and methods continuously,combining the characteristics of the glasshouse farm crop plant, continuously creative,gradually perfect.
This thesis introduced the research development condition of domestic and international glasshouse environment control system first, pointed out the development trend and analyzed the existent shortage of the existing glasshouse environment control system. The glasshouse environment control is used to control the light shine,temperature,humidity,C02 density etc. within the scope of the farm crop grow request. So it is meaningful to analyze how environmental factors effect on the farm crop grow and how effect between environmental factors.Based on the model of fieldbus using in the scope of industry control,put forward the
AFCS( Agricultural Field Bus Control System)reference model and got the physical model of distributed glasshouse control system. Then the paper carried on the design of the hardware and software of the system based on PC and PLC. An integrity glasshouse control system shoulds till includes pray irrigation control system.So the paper includes the of spray irrigation system.At last using the configuration software-KingView6.5,author made simulated software that can imitate the movement of greenhousee quipment.And the software can be used to carry on the parameter constitution,report and curve search,and alarming.
Keywords: ornamental greenhouse, environmental factor ,fieldbus,distributed control,
configuration software