Ventilation system and control method of sunlight greenhouse rolling blind based on intelligent prediction

Abstract

The invention relates to a ventilation system and control method of sunlight greenhouse rolling blinds based on intelligent prediction. The system comprises a motion execution mechanism, a controller and a data processing decision module; the motion execution mechanism comprises a rolling blind motor, a film rolling motor, a motor rotating shaft, a telescopic rod and a spacing protecting device; the controller comprises a single-chip microcomputer, an environment sensor, a memory card, a wifi module, an angle sensor and a motor control circuit; the data processing decision module comprises a historical data query system, a weather forecast and query system, real-time meteorology data acquisition system and a collaborative optimization processing system. The data processing decision module of the invention generates the scheme of controlling the rolling blinds and ventilating; the controller sends instructions of start-up or shut-down of the motor to complete rolling blinds and rolling films through the motor control circuit. The system and method of the invention increase the accuracy of spacing protection stroke: piecewise function control is adopted so as to avoid rapid environment temperature change affecting the growth of crops when bottom ventilating openings are opened due to large temperature difference.

Description

technical field [0001] The invention relates to facility agricultural technical equipment, in particular to an intelligent prediction-based solar greenhouse rolling curtain ventilation system and a control method. Background technique [0002] Solar greenhouses mainly produce vegetables, which play an important role in improving the living standards of urban and rural residents and greatly increasing farmers' income. Many greenhouses have used electric roller blinds instead of manual retractable straw curtains or quilts in greenhouses. The work efficiency is improved, and in order to improve the safety performance, the method of installing travel switches at the top and bottom of the greenhouse is used to limit the position protection of the roller shutter motor. In order to avoid the impact of the high temperature and high humidity environment formed in the closed space of the solar greenhouse on the growth of crops, generally one vent is opened in the upper and lower parts...

AI Technical Summary

Problems solved by technology

Since the bottom vent is closer to the crop than the top vent, opening the bottom vent in the case of a large temperature difference will cause a sharp change in the temperature of the crop growth environment and affect the growth of the crop.

[0003] After searching the existing technical documents, it is found that the patent number "CN201420700040" is a nut slider type roller shutter stroke limiter. Although it provides a roller blind stroke limiter that is not easily affected by weather, wind, frost, rain and snow, This kind of limit device realizes the limit protection through the number of rotations of the roller shutter machine, which is easily affected by factors such as the thickness change of the insulation quilt under different weather conditions, re...

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