Control method and system for daylight hothouse roller blind machine based on light and temperature coupling

Abstract

The invention relates to a control method and system for a daylight hothouse roller blind machine based on light and temperature coupling. The method comprises that a threshold of the illumination intensity is set according to the demanded illumination quantity of a hothouse plant and the growth phase of the plant, the illumination intensity and temperature of the outdoor environment as well as the temperature in the hothouse is detected, a central processor controls start of the roller blind machine in a light and temperature joint control logic algorithm, if the outdoor illumination intensity is greater than the set threshold, the light and temperature joint control logic requirement is met, the central processor emits an instruction to automatically control the roller blind machine, a central control chamber can monitor the environment factor, and multiple hothouses can be controlled manually via a 485 bus. The method and system support functions including illumination intensity sensing, real time monitoring, cluster control and automatic roller blind machine control, and are characterized by low cost, simple operation, wide application range, and safe operation.

Description

technical field [0001] The invention belongs to the field of agricultural modernization, and relates to automatic control of a greenhouse rolling machine, in particular to a control method and system for a solar greenhouse rolling machine based on light-temperature coupling. Background technique [0002] With the continuous development of the economy and the continuous advancement of science and technology, the number of greenhouses is increasing, and it is a heavy work to retract the straw curtains and quilts of the greenhouses. Many greenhouses have used electric roller shutters. When retracting the straw curtains or quilts in the greenhouse, the rolling up and down of the roller shutter machine needs to be watched by the administrator on site, usually in the way of closing them one by one, and once negligence may cause the roller shutter machine to reverse, which has the advantages of long labor time and safety. However, it has disadvantages such as poor performance, high...

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Problems solved by technology

[0002] With the continuous development of the economy and the continuous advancement of science and technology, the number of greenhouses is increasing, and it is a heavy work to retract the straw curtains and quilts of the greenhouses. Many greenhouses have used electric roller shutters. When retracting the straw curtains or quilts in the greenhouse, the rolling up and down of the roller shutter machine needs to be watched by the administrator on site, usually in the way of closing them one by one, and once negligence may cause the roller shutter machine to reverse, which has the advantages of long labor time and safety. However, it has disadvantages such as poor performance, high strength, and low efficiency. At the same time, accidents of rolling dead people frequently occur in greenhouse rolling machines. Therefore, the use of this rolling machine is convenient and dangerous, which cannot meet the high efficiency, automation, safety and convenience of modern agriculture. quick request

[0003] In recent years, with the large-scale promotion of greenhouses in agricultural production, many new roller shutter systems have appeared on the market, and the corresponding control methods are relatively simple, such as remote control roller shutters, roller shutters with limit functions, etc., but The traditional roller shutter system still occupies a relatively large market. Its disadvantage is that it requires personnel to manually control the roller shutter beside the greenhouse, and does not have a limit function; a small number of roller shutters with a limit function and remote control control also need Personnel are present, even if they may not be present, but it does not perform intelligent control based on real-time light intensity and indoor and outdoor temperature. At the same time, most of the existing systems intelligently perform independent control of a single greenhouse, which greatly reduces the management efficiency of clustered greenhouses.

It can be seen that there are many problems in the application of the existing roller blind machine system in the intelligent trend of greenhouses. First, it does not affect the greenhouse crops according to the correlation between real-time ambient light intensity and temperature; second, it cannot perform intelligent automatic control, which greatly reduces Improve the management efficiency of the greenhouse and increase the operating cost

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