Greenhouse light amount control apparatus and method

Abstract

The invention discloses a greenhouse light amount control apparatus. The apparatus is characterized by comprising a PLC, and a light quantum sensor, an operating display, a first magnetron switch and a second magnetron switch that are connected with the PLC, wherein the first magnetron switch and the second magnetron switch are connected with a sunshade net control circuit and a light supplement lamp control circuit of a greenhouse respectively, and the PLC controls motions of the first magnetron switch and the second magnetron switch on the basis of signals provided by the light quantum sensor and the operating display. The light quantum sensor, the PLC, the magnetron switches and the like are combined organically, and a sunshade net and a light supplement lamp are controlled to be on and off according to data detected by the light quantum sensor. Therefore, light supplements are accurately provided to plants in all growing stages, the output is effectively increased, and energy is greatly saved. The invention also provides a light amount control method based on the above light amount control apparatus.

Description

technical field [0001] The invention relates to the technical field of lighting control in greenhouses, in particular to a total light control device and control method for greenhouses. Background technique [0002] Illumination is an important factor affecting plant growth. There is a saying in the industry that increasing light by 1% can increase yield by 1%. At the same time, this statement has also been verified to be effective in the actual professional large-scale planting in China, that is, Form a new light application concept "accumulated light", which is interpreted as the accumulation of light. The definition of accumulated light is that the total amount of light absorbed by plants throughout the growth cycle is constant, too little will affect the growth of plants, too much will have no effect on growth, and it is a waste of light. However, at present, the supplementary light in traditional greenhouses is blind or empirical, and cannot realize the online analysis...

AI Technical Summary

Problems solved by technology

However, at present, the supplementary light in traditional greenhouses is blind or empirical, and cannot realize the online analysis and processing of the illuminance inside the greenhouse.

Although some greenhouses have begun to use illuminance sensors to detect illuminance, since the detection principle of illuminance is defined based on the structure of the human eye, it is impossible to accurately measure the total amount of light absorbed by plants in a day

It is also impossible to provide an accurate data support for the supplementary light system, so that accurate on-demand supplementary light cannot be achieved, resulting in waste of power for the supplementary light, increasing the workload of the cooling system, and failing to achieve effective energy-saving effects

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