一种多光谱亮度可调的LED光照系统

摘要

Aiming at meeting the need of plant characteristic spectrum research, a lighting system is designed which chooses STC89C52RC as the control core, uses RX5801 chip to drive multi channel high-power LED with constant current and takes PWM to adjust the intensity. The system achieves the goal of multi-channel LED working independently, multi-stage adjustable intensity as well as any combination of different spectra with different intensity. Its abundant spectral combination can provide the experimental conditions for the study of different plant characteristic spectrum effect on plant growth.%针对植物特征光谱研究的需要,设计了一种以STC89C52RC单片机为控制核心,采用RX5801芯片恒流驱动多路大功率LED,并以PWM方式调光的光照系统。系统实现了多路LED灯的独立工作、亮度多级可调以及不同光谱在不同亮度下的任意组合。其丰富的光谱组合为研究不同植物特征光谱对植物生长状况的影响提供了实验条件。