automated liquid-level control of a nutrient reservoir for a hydroponic systemA microprocessor-based system for control of the liquid level of a nutrient reservoir for a plant hydroponic growing system has been developed. The system uses an ultrasonic transducer to sense the liquid level or height. A National Instruments' Multifunction Analog and Digital Input/Output PC Kit includes NI-DAQ DOS/Windows driver software for an IBM 486 personal computer. A Labview Full Development system for Windows is the graphical programming system being used. The system allows liquid level control to within 0.1 cm for all levels tried between 8 and 36 cm in the hydroponic system application. The detailed algorithms have been developed and a fully automated microprocessor based nutrient replenishment system has been described for this hydroponic system.
Smith, Boris (Tuskegee Inst. AL United States)
Asumadu, Johnson A. (Tuskegee Inst. AL United States)
Dogan, Numan S. (Tuskegee Inst. AL United States)
August 17, 2013
January 1, 1997
Publication: The First National Student Conference: NASA University Research Centers at Minority Institutions