Boots – shoes – and leggings
Patent
1996-06-12
1998-10-06
Kemper, Melanie
Boots, shoes, and leggings
364506, 364420, 47 17, 47DIG6, G06F 1900, A01G 914
Patent
active
058187340
ABSTRACT:
A method for controlling greenhouse light employs first and second algorithms for controlling a supplemental lighting system and a shade control system, respectively, in a greenhouse. The lighting control algorithm controls actuation of electric lamps in the greenhouse based upon a plurality of rules. These rules employ weather and climate data, accumulated and calculated photosynthetic photon flux (PPF) data and off-peak electricity rate hour data to provide uniform daily integrated PPF values in the most cost efficient manner. The shade control algorithm works in conjunction with the lighting control algorithm to insure that the daily PPF values do not exceed a target value on days when the PPF accumulated from solar insolation exceeds the target value. The shade control algorithm operates very precisely to avoid an over shading condition which would require undesirable actuation of the supplemental lighting control system for compensation.
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Ishii et al., "Studies on the Development of Supplemental Lighting Control System for Sunlight in Greenhouse" Shita Journal 5(1), pp. 1-10, 1993.
Cornell Research Foundation Inc.
Kemper Melanie
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