Greenhouse multi-model information fusion based methods and system for regulating and controlling greenhouse environment

Abstract

The invention discloses a greenhouse multi-model information fusion based technology for regulating and controlling the greenhouse environment. According to environmental information such as the temperature, the humidity, the illumination intensity and the carbon dioxide concentration inside a greenhouse, which is obtained by a greenhouse environment information collecting sensor, three kinds of greenhouse environment control models which are based on a set value, the illumination and the accumulated temperature are used respectively for extracting feature vectors, multi-information fusion of feature vectors of three kinds of regulating and controlling methods is conducted by using a Dempster/Shafer (D-S) evidence theory method, an environment optimization controlling and regulating decision strategy is established, and coordination of short-scale and long-scale control requirements of the greenhouse is achieved. An actuating mechanism is controlled by a greenhouse environment controller to act to achieve real-time control of greenhouse environmental parameters.

Description

technical field [0001] The invention belongs to the technical field of greenhouse environment control for facility agriculture, and in particular relates to a greenhouse environment control method and system for multi-model information fusion of greenhouses. Background technique [0002] With the development of crop growth simulation models and computer technology, since the mid-1970s, countries such as the Netherlands, Japan, the United States, and Italy have begun to use microcomputers to monitor the growth environment of greenhouse crops. By the 1990s, the technology of greenhouse environment control had developed to a higher level. In greenhouse environment control, the setting of parameters is mainly based on the optimum growth of plants or the lowest cost of environmental control. [0003] The most simple and direct method of greenhouse environment control is the control of environmental parameters such as temperature, humidity, and light. The critical value is used a...

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Problems solved by technology

[0004] However, in the process of controlling the greenhouse environment, it was found that the critical value control aimed at the lowest cost will limit the crop yield level.

During long-term rainy and low-light periods, and during periods prone to photosynthetic "lunch breaks", the resulting control schemes are often not the optimal environmental regulation combination for crop growth.

In addition, the regulation based on light belongs to the regulation of fast dynamic parameters, and the opening and closing of the regulation mechanism is relatively frequent, which affects the life and reliability of the regulation mechanism; while the regulation method based on accumulated temperature is based on the accumulated effective temperature within 24 hours of a day when the crops are suitable for growth. Indicators belong to long-term scale regulation, often have hysteresis in control, and sometimes cannot achieve the goal of optimal crop growth

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