Method and device for controlling greenhouse environment

Abstract

The present invention provides a greenhouse environment regulation method and device. The method includes obtaining the current light radiation value of the greenhouse environment in real time, and sending a control signal to a shading device to shade the light when the current light radiation value is greater than a preset threshold, and the current light radiation value is less than or equal to the preset threshold. When setting the threshold, the temperature range to be regulated is obtained according to the first relational table, and the humidity range to be regulated is obtained accordingly, and the range of carbon dioxide fertilization amount to be regulated is obtained according to the second relational table; according to the current light radiation value and the daily preset The radiation cycle calculates the cumulative amount of radiation throughout the day, and based on this, the preset cumulative amount of radiation throughout the day and the radiation value per unit time of the supplementary light equipment determine the time to be supplemented with light; judge whether the current light radiation value is equal to the preset historical average daily radiation, The amount of water to be regulated is determined according to the judgment result; and the environment of the greenhouse is regulated according to the value to be regulated. The invention is driven by the light radiation value, adjusts the above parameters online, simplifies the coupling effect, increases photosynthesis and reduces respiration, etc.

Description

technical field [0001] The invention relates to a greenhouse environment control method and device. Background technique [0002] As a new mode of agricultural production, facility agriculture has become an important way to solve the contradictions between population, food and land in our country. At present, my country's greenhouse environment control is still mainly based on the experience of producers, lacking scientific control objectives and effective measurement and control methods, resulting in serious problems such as serious diseases and product pollution. Therefore, improving the level of greenhouse environment control as a whole has become an urgent need for industrial upgrading and sustainable development. [0003] Currently used in greenhouse environment control methods mainly include PI control, PID, feedforward control, nonlinear feedback control and so on. Based on the above control algorithm, the researchers developed a multi-factor integrated control syst...

AI Technical Summary

Problems solved by technology

Many of the current background technologies are controlled by setting the upper and lower limits of a single factor, rarely considering the interaction between the environment, and seldom using the physiological effects of crops as the theoretical basis for environmental control; multi-factor and multi-model control increases the overall system complexity and is difficult to integrate On-site control is realized in the control system, and at the same time, energy consumption is not taken into account; the use of light drive is currently only used for independent parameter control, such as light-guided irrigation and light-guided supplementary light, which rarely control greenhouse temperature, humidity, light, carbon dioxide fertilization, Integrated light drive control system for irrigation and fertigation

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