METHOD OF FORMING AN OPTIMUM LIGHT ENVIRONMENT FOR PLANTS GROWN IN CLOSED GROUND AND A SYSTEM OF LED LIGHTING, WHICH REALIZES THIS METHOD (VERSIONS)

摘要

FIELD: crop growing.;SUBSTANCE: absorption spectrum of optical radiation of plants is determined at different stages of their ontogenesis, at different time of day, different months and seasons. Radiation spectra of light-emitting diode phyto-irradiators corresponding to the plant absorption spectrum are determined as close as possible to the plant absorption spectrum and these data are introduced into the control device. Optimum radiation spectrum is reproduced by LED phyto-irradiators in the form of a sum of N monochromatic radiations of light-emitting diodes, where N corresponds to the optimum number of monochromatic components, on which the total spectrum of absorption of plants grown in closed soil is decomposed, wherein amplitude of monochromatic components is controlled by means of control device by changing current flowing through light-emitting diodes so that total radiation spectrum of phyto-irradiators as close as possible to optimum radiation spectrum. At different stages of ontogeny of cultivated plants and depending on conditions of external lighting taking into account the time of day, month and season of year automatic control of radiation spectrum of phyto-irradiators is carried out. Method is realized using a LED lighting system, which includes: at least one multispectral phyto-irradiator containing several groups of light-emitting diodes with a controlled radiation spectrum of each group of light-emitting diodes, a unit for controlling intensity and spectral composition of radiation of phyto-irradiators, made on the basis of a computer with a platform for data collection and control, a spectrum sensor, and drivers for controlling radiation intensity of light-emitting diodes of phyto-irradiators. Each phyto-irradiator consists of N-number of groups of series-connected light-emitting diodes, where N corresponds to optimum quantity of monochromatic components, on which total spectrum of absorption of grown plants is decomposed. Phyto-irradiator radiation intensity is controlled by supplying control signal to drivers from data collection and control platform.;EFFECT: invention improves energy efficiency of the lighting system.;3 cl, 7 dwg