Greenhouse regulation and control optimization method

An optimization method and greenhouse technology, applied in the direction of non-electric variable control, control/regulation system, simultaneous control of multiple variables, etc., can solve unsatisfactory problems and achieve low accumulated temperature compensation costs and good benefits

Inactive Publication Date: 2016-06-15
SHENYANG AGRI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This way of adjusting the greenhouse by relying on experience, although the operation is still good, but in terms of benefits, it is not satisfactory, and there is a lot of room for improvement

Method used

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Embodiment Construction

[0036] Attached below Figure 1~3 The present invention will be described in detail with specific embodiments, and the following description is only for demonstration and explanation, and does not limit the present invention in any form.

[0037] The greenhouse control and optimization method adopted in this embodiment, its process is as follows figure 1 shown.

[0038] Step S101 , according to the type of plant to be planted, preset the lower limit and upper limit of the limit temperature of plant growth corresponding to the plant. The greenhouse structure in the present embodiment has a ridge height of 4.5 meters, an eaves height of 2.5 meters, a width of 6.8 meters, and a length of 20 meters. Choose the plants as cucumbers. When the cucumber grows to 2 to 3 true leaves in the nursery, it is transplanted into the greenhouse, and the transplanting period is early April 2014. The most suitable temperature for cucumber is 18°C ​​to 30°C, the limit temperature is 10°C lower ...

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Abstract

The invention provides a greenhouse regulation and control optimization method and relates to a temperature control or regulating system. The greenhouse regulation and control optimization method is characterized in that a relation expression between crop growth rate and environmental factors is obtained through a crop growth model; the optimum temperature value determined under some illumination intensity is utilized to replace the roughly-set value obtained based on experience in a conventional method; a regulation and control cost model is established, and the operation cost of a regulation and control device can be calculated; and according to the accumulated temperature theory, the method enables the temperature set value of a day to be divided into three stages instead of a conventional method of day-night two temperature setting values: during high-illumination daytime, the temperature value is set according to the optimum photosynthesis principle; during low-temperature after midnight, the temperature value is set according to optimum cost principle; and accumulated temperature compensation is carried out during before midnight, when the temperature is moderate and compensation cost is low. The method can meet temperature value required for crop optimum photosynthesis, is low in accumulated temperature compensation cost and is good in benefit.

Description

technical field [0001] The invention relates to a temperature control or regulation system, in particular to a method for controlling and optimizing a greenhouse. Background technique [0002] In the traditional greenhouse production process, the setting of greenhouse environmental factors is basically based on experience, and the suitable environment for crop growth, as well as the upper and lower limit temperatures that are not suitable for crop growth can be obtained by observing different weather conditions and crop growth conditions. Although this method of adjusting the greenhouse based on experience works well, it is unsatisfactory in terms of benefits, and there is a lot of room for improvement. Contents of the invention [0003] In view of the defects existing in the prior art, the object of the present invention is to provide a greenhouse control optimization method, which is easy to use and can effectively reduce the operating cost of the existing control. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D27/02
CPCG05D27/02
Inventor 张志霞王铁良许童羽吕学品徐静
Owner SHENYANG AGRI UNIV
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