Multi-channel Priority Control System for Greenhouse Rolling Machine

In the daily management of the greenhouse rolling machine，there is frequent a low working efficiency and an emergency cannot be solved due to its single control mode.A multi-channel priority control system of greenhouse rolling machine based on singlechip was designed.The system consisted of hardware terminal and remote server.The hardware terminal utilized STC15W404AS controller，using RXB8 superheterodyne receiving module to get the signal from the remote controller.GPRS module was applied to realize communication between hardware terminal and remote server.The system contained four control signals：manual key control，wireless remote control，limit switch control and remote server control.Processing signals was done with priority decision circuit so as to achieve priority control of the rolling machine.Experiment results demonstrated that response time of remote server command was 1.7 s and the packet loss rate of wireless remote control and remote server control was less than 4.5%.The remote sever software achieved remote monitor and control of rolling machine stably and rapidly.Moreover，this system could not only realize multi-channel priority control of rolling machine，but also meet requirement of intelligent management of greenhouse rolling machine effectively.