可控LED亮度的植物自适应精准补光系统

人工补光对作物生长具有重要作用，发光二极管（LED）作为一种新型光源在作物补光系统中具有广阔的应用前景。针对目前常用的定光照度、定光质补光方式存在的不足，该文设计了一种综合考虑作物特性、光合有效辐射、环境温度等因素的自适应精确补光系统。该系统实时监测特定波段光照度、环境温度，精确计算作物补光量，并通过脉宽调制（PWM）信号控制红、蓝光LED灯组亮度，支持对不同植物在不同生长阶段、不同环境下的按需分波长定量补光，具有精确化，智能化，低能耗的特点。经温室实际生产过程的试验结果表明，补光系统性能可靠、达到了定量精确补光的设计要求，可避免植物生长不同阶段补光不足或过量的问题，从而提高了能源利用率。

Self-adaptive and precise supplementary lighting system for plant with controllable LED intensity

The artificial light plays an important role in crop growth, and LED as a new light source has broad prospects in the development of supplementary lighting system. According to the deficiency of fixed light intensity and light spectrums, this paper presented a self-adaptive and precise supplementary lighting system with comprehensive consideration of crop characteristics, effective photosynthesis light intensity and environment temperature. The system monitored the environment temperature and light intensity of specific light spectrums, and calculated the amount of supplementary light accurately. Based on two PWM signals, both red and blue light intensity were adjusted to meet different demands of quantitative supplementation of light in different stages and conditions. Experiments were made in actual production. The results showed that the system was stable, reliable and accurate, and could avoid the lacking or excess supplementation of light in different stages of crops.