Light following and supplementing system in facility cultivation

Abstract

The invention discloses a light following and supplementing system in facility cultivation. The light following and supplementing system comprises an intelligent light following module and a cultivation mechanism which operates in cooperation with the intelligent light following module, and further comprises an intelligent light supplementing module and a cultivation mechanism which operates in cooperation with the intelligent light supplementing module; the intelligent light following module comprises a control unit and a photoelectric detection unit, the photoelectric detection unit comprises a sunlight tracking sensor, in sunny days, the photoelectric detection unit is started, the sunlight tracking sensor in the photoelectric detection unit converts light signals into electric signals,the sunlight tracking sensor can control multiple directions, and the sunlight tracking sensor transmits the electric signals to a control unit; and in rainy days, the latest light following scheme is repeated. The intelligent light supplementing module presets different crop illumination requirement thresholds, and when the light accumulation value of an intelligent light following system in thedaytime cannot reach the system preset threshold of a crop, a light supplementing system is automatically started to reach the threshold. According to the light following and supplementing system, the illumination utilization rate is high, the illumination environment is uniform, the space utilization rate is increased through a multi-layer cultivation mode, the energy consumption is low, and thecost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of light supplementation for crops, in particular to a light tracking and supplementary light system in facility cultivation. Background technique [0002] There are two main types of supplementary light technologies for planting protected agricultural crops: one is mainly derived from sunlight, and its light energy does not rely on artificial supplementary light, but completely relies on natural light. Due to the limitation of lighting in the structure of the greenhouse, the light utilization rate is low; one is artificial light supplementary light, which is generally a point light source. Adjust the height and light intensity, and for crops with high plant height and wide crown width, the lower leaves are easily blocked by the upper leaves, and there are problems that the upper light intensity is high, the lower light intensity is low, and the overall plant receives uneven light. The photosynthesis effici...

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Problems solved by technology

[0002] There are two main types of supplementary light technologies for planting crops in facility agriculture: one is mainly derived from sunlight, and its light energy does not rely on artificial supplementary light. Relying on natural light, due to the traditional single-layer cultivation mode used internally and the constraints of greenhouse structure lighting, the light utilization rate is low; one is artificial light supplementary light, which is generally a point light source, and the light intensity is inversely proportional to the square of the distance , and fixedly installed above the ceiling, the height and light intensity cannot be adjusted according to the different growth stages of the crops, and for crops with high plant height and wide crown width, the lower leaves are easily blocked by the upper leaves, and there is an upper light intensity High, low light intensity in the lower part, uneven light received by the whole plant, and low photosynthetic efficiency in the lower part of the plant, which affects the yield and quality of crops

[0003]In the prior art facility agricultural crop planting light chasing and supplementary light system, the traditional natural light cultivation, the cultivation mode is mostly single-layer cultivation, under this cultivation mode, the crop can maximize Receive natural light to the limit, and the lighting environment is relatively uniform, but the space utilization rate of the single-layer cultivation mode is low, and the efficient use of space cannot be achieved, and the yield is lower than that of the multi-layer three-dimensional cultivation form for high-density cultivation.

In order to improve space utilization, more and more facility greenhouses adopt multi-layer three-dimensional cultivation. The supplementary light mode of artificial supplementary light is generally a point light source, which is fixedly installed above the greenhouse roof. The crops can receive enough light, affected by the structural facilities of the three-dimensional cultivation, the crops on the lower cultivation surface are in the backlight and adversity, which leads to the crop yield during the harvest period not meeting the production needs. In order to enable all crops to obtain uniform light, It is necessary to add artificial electric lighting to each layer of the cultivation frame, resulting in more energy loss, and the construction cost and later maintenance cost are huge, which increases the operating cost

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