With the global increase in energy prices and the urgent need to reduce CO 2 emissions to the atmosphere, high energy usage is the main problem the greenhouse industry facing.Optimized control of supplemental lighting intensity and quality help to improve productivity and energy efficiency of greenhouse.In this paper,LED light source module is developed according to the design of light distribution of RRGB chip based on plants need for uniform lighting.Adaptive LED supplementary lighting system realize collection, storage and call of environmental data, and adaptive regulation of red, green, and blue light output based on combination of upper computer LabVIEW and controller STM32.PC based on LabVIEW monitor environmental parameters,and call or choose PPFD setting value of red, green, blue three bands of light based on expert database.The controller communicating with LabVIEW wirelessly through WiFi module, conducts real-time detection and adaptive regulation on photosynthetic photon flux density (PPFD) of red, green and blue bands according to PPFD setting value.This intelligent supplemental lighting system meets the requirement of plants for lighting environment and greatly saving energies through adaptive adjustment of PPFD of red, green and blue bands in environment according to the setting based on different supplemental lighting demands of different plants or the same plant in different growth stages for PPFD and light quality ratio.
LED light source module is developed according to the design of light distribution of RRGB chip based on the demand of plants for light, temperature and humidity. Several light source modules constitute LED array planar light source module. Monitoring and control of the system is realized through the combination of upper computer based on LabVIEW and controller. The controller conducts real-time detection on photon flux density (PFD) of red, green and blue bands, temperature and humidity and displays the detection information on the interface of upper computer. Pulse width modulation (PWM) signal is adjusted dynamically through the controller so as to make PFD value of plants under lighting remain constant, thus realizing intelligent fill lighting of the lighting system in combination with ambient light. Meanwhile, the system also realizes intelligent adjustment of temperature and humidity threshold range. This intelligent fill lighting system meets the requirement of plants for fill lighting environment and greatly saving energies through the setting of different PFD values and temperature and humidity ranges of red, green and blue bands by upper computer and the completion of environmental control by lower computer according to the setting based on different fill lighting demands of different plants or the same plant in different growth stages for PFD and light quality ratio.
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