Nutrient Solution Microcomputer Automatic Monitoring System For Research And Application

An auto-control computer system of nutrient solution in soilless culture of greenhouse is presented. In order to get regular water supply, the dynamic identification for different growth system is necessary. This auto-control system is an integrated system with widespread application value, especially for intensive agriculture and protected horticulture. It is also used for real time control with delay in chemical and light industry. The research method of dynamic identification in different growth system is described in the paper; the design and mathematical model were established. The result clarified the system has a very useful functions with small volume, low price, and the system is of being installed and maintained easily. The working principals of the auto-control system is introduced. especially for the mathematical model, sensor, system control, data collection, AID, D/A transfer design, connection techniques, interface. And the paper showed the design of anti-power noise and prevent power-off using the 8031 single chip microcomputer, the hardware of relay of solid-state power and software that made by assemble program. This study has been authenticated by Heilongjiang sciences committee, therefore, the debug has been finished.