Microcomputer Based Controller for Flow Regulation of a Chemigation Pump
1988
Thomson, Steven J. | Threadgill, E Dale
A controller based on a single board computer was developed to automatically regulate the amount of chemical applied through injection pumps used with center pivot irrigation systems. User inputs of land area and desired chemical amount to be applied per unit area are used by a BASIC program to calculate proper setting of the pump. Digital control codes are sent by the computer via a D/A converter to set the pump. Under-range and over-range safety indicators are incorporated as well as a user indication of the center pivot's percentage "on" time.
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