A Study on the Greenhouse Environmental Parameter Classify Control System by Microcomputer

In this paper,a microcomputer system for monitor and control the air and soil tempereture,humidity and luminosity of greenhouse environment is introduced. This system use IBM-PC as a store data unit and MCS-51 or SDK-86 as monitor and control unit.The system hardware is composed of main module,seasor and A/ D transformer, Data collector, Output control,Display and Print modules,all of these are illustrated. The working principle,main control program and the results of try out also are discribed.With multi-channel I/O, independently control eight greenhouses and six phases of temperature have been real-ized.So it is especially suitable for environment control of multi-greenhouse.