Abstract
Modern agricultural production is inseparable from the environmental control.Controlling system is the basis of the management automation in the greenhouse.With the growth rules controlling circumstance condition,it makes greenhouse better condition than outdoor in the unfit season,and more productive and high quality.
This paper gives a greenhouse temperature and humidity and remote control system which is based the single-chip .The secondary computer system chosen AT89S52 single-chip machine, and digital one-wire temperature and humidity sensors collecting temperature and humidity,the use of wireless data transmission module PTR8000; host computer constitute by the MCU and LCD modules, keyboard input values of temperature and humidity to control equipment of the secondary computer to open and close, heating, humidification,ventilation , LCD display .This paper demonstrates development status of agricultural greenhouse temperature and humidity control system,and general scheme of the system.In order that it’s convenient to debug,trans-plant,amend,this thesis design the software using C51.The model block is composed of data acquisition,data receiving and launching,keyboard and displayand so on.
This thesis choose the devices as full consideration of the ration between performance and cost as possible. After debugging, measuring result is in good agreement with anticipate.This controlling system is simple,reliable,stable and low cost.It can be applied not only in the agriculture-greenhouse ,but also in environment monitoring and constant hygrothermal factory,and it has much of value to apply and popularize in other fields.