Studies on Computer Measurement and Control System of Intelligent Greenhouses Environmental Parameters

Based on the situation that low technological content about the greenhouse of our country and backward industrialization,this system adopts advanced computer technology,micro-electronic control technology and sensing technology to design the distributed automatic control system of the greenhouse computer based on RS-485 bus.Adopts half duplex RS-485 bus communication network and accumulate and check-up algorithm,this system carries on data transmission.It can collect environmental parameters and control the adjusting devices of the greenhouse.Utilizing VB6.0 face target's database programming technology and access database software,friendly man-machine interface is developed.By reading and sto- ring the environment parameter value of the greenhouse in real time,the management to four greenhouse environmental parameters,such as temperature,humidity,illumination and CO_2 density is realized,which can be consulted conveniently.