Greenhouse LED lighting device based on PLC controlling

Abstract

The invention discloses a greenhouse LED lighting device based on PLC controlling. The greenhouse LED lighting device comprises a bridge, a PLC and a plurality of LED lighting boxes. The bridge comprises a plurality of levels of sub-units vertically arranged, each sub-unit comprises a supporting frame arranged on the ground and a cross beam horizontally arranged at the top end of the supporting frame, the supporting frames are provided with the PLC, LED red light sensors, LED blue light sensors and LED far-red light sensors, and the two ends of each cross beam are provided with the LED lighting boxes; each LED lighting box comprises a telescopic hanging rod, a top plate, a heat dissipating plate and a light plate, the lower surface of each light plate is provided with a plurality of LED red lights, LED blue lights and LED far-red lights, the upper surface of each light plate is closely attached to the lower surface of the corresponding heat dissipating plate, and the upper surface of each heat dissipating plate is provided with corresponding LED red light drivers, LED blue light drivers and LED far-red light drivers. The greenhouse LED lighting device is simple and ingenious in structure and low in heat of the LED lamps and can be widely applied to all growing stages of plants.

Description

technical field [0001] The invention relates to a lighting device, in particular to a PLC-based greenhouse LED lighting device. Background technique [0002] The process of plant growth and development is an extremely complex life phenomenon, which is not only determined by the genetic characteristics of the plant itself, but also affected by external environmental conditions. Light is the energy source of plant photosynthesis, and its intensity has a great impact on plant growth and development. For most plants, light quality refers to the spectral composition of light received by plants, and different spectral bands have different effects on plants. Plants Through the various pigment systems in the body, it senses light in different wavelength ranges and regulates the growth, development and metabolism of plants. A large number of studies have shown that red light and blue light are the two most important spectra for plant growth. Red light affects the plant's leaf expan...

AI Technical Summary

Problems solved by technology

[0005] Although ordinary LED plant growth lamps have the advantages of energy saving, no pollution, and long life, most of them can only simply control and customize the ratio of red and blue. Regulation has not yet matured products

At the same time, the disadvantage of LED is that the output spectrum is narrow, and at least two kinds of LEDs, blue light and red light, need to be combined to meet the growth needs of plants.

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