Agricultural environment heat preservation quilt control system and method

An environmental insulation and controlled technology, applied in general control systems, control/regulation systems, program control, etc., can solve the problem of affecting greenhouses, failing to achieve refined management, and failing to improve the thermal insulation quilt rolling control system and method, etc. problems, to achieve the effect of thermal insulation and lighting realization, thermal insulation and lighting precise control

Inactive Publication Date: 2017-06-06
中国农业科学院农业经济与发展研究所
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Problems solved by technology

The performance of solar greenhouses: the light transmittance of energy-saving solar greenhouses is generally above 60%~80%, and the temperature difference between indoor and outdoor can be kept above 21~25 degrees Celsius, but the current management of solar greenhouses has not been refined. Management. At present, greenhouses generally achieve the effect of heat preservation through heat preservation quilts, and realize the control of daylighting through heat preservation quilts. The control of the roll-up of heat-insulation quilts affects the growth of internal crops, and the control of the roll-out time and time of heat preservation quilts Depending on the internal environment of the greenhouse, for different types of crops and agricultural greenhouses in different locations, there is currently no perfect thermal insulation quilt rolling control system and method, which can provide the best for the growth of crops through the collection and analysis of environmental parameters inside and outside the greenhouse. The environment affects the development of domestic greenhouse planting

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Agricultural environment heat preservation quilt control system and method

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Effect test

Embodiment 1

[0025] A method for controlling thermal insulation in an agricultural environment, comprising the following steps: the first step is to determine the sunrise time, sunset time, and zero solar altitude angle time of the day of the detection site, and determine it through a calculation formula, and preliminarily determine the time when the thermal insulation is rolled up; The calculation method of sunrise and sunset time is: the geographical location of the calculation place, longitude Long, latitude G1at, time zone zone, UTo is the sunrise and sunset time calculated last time, UTo=180° at the first calculation.

[0026] (1) First calculate the number of days from January 1, 2000, GMT to the calculation day;

[0027] (2) Calculate the century number t from January 1, 2000 AD to the calculation date, GMT,

[0028] Then t=(days+UTo / 360) / 36525;

[0029] (3) Calculate the flat yellow diameter of the sun L=280.460+36000.770×t;

[0030] (4) Calculate the mean anomaly angle of the su...

Embodiment 2

[0057] A method for controlling heat preservation in an agricultural environment, comprising the following steps: the first step is to determine the sunrise time, sunset time and zero solar altitude angle time of the detection site on the day, determine by calculation formula, and preliminarily determine the time when the heat preservation is rolled up;

[0058] The second step is to compare the result of multiplying the external wind speed time coefficient of the empirical parameters with the external wind speed data detected by the detection module, and optimize the initial confirmation of the time when the insulation is rolled up. The empirical value of the external wind speed is based on different locations and different times. The empirical judgment of the wind speed at the point is obtained;

[0059] The third step is to compare the multiplication result of the time coefficient of the temperature difference between the inside and outside of the greenhouse with the empiric...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

An agricultural environment heat preservation quilt control system comprises a detection module, a control module and an implementation module. The control module comprises a data analysis module and a compensation module. The data analysis module processes detection data of the detection module, conducts comparative analysis of the detection data and experience data, obtains a conclusion, and emits an instruction. The compensation module conducts compensation optimization on an analysis result of the data analysis module through comparative analysis of the detection data of the detection module and control parameters. The implementation module receives an instruction of the control module to roll or unroll a heat preservation quilt. The priority of data parameters in the data analysis module is as follows from high to low: external illumination, greenhouse earth temperature, greenhouse temperature, temperature differences inside and outside a greenhouse and external wind speed. Through accurate detection and analysis of environments inside and outside the greenhouse and also through continuous data analysis, the moment when the heat preservation quilt is rolled or unrolled keeps being optimized, and accurate control over insulation and lighting of the greenhouse is realized.

Description

technical field [0001] The invention relates to the technical field of agricultural environment control, in particular to an agricultural environment heat preservation controlled system and method. Background technique [0002] The solar greenhouse adopts relatively simple facilities and makes full use of solar energy. In cold regions, vegetables are generally cultivated overwintering without heating. The solar greenhouse, which is a cultivation facility for fresh vegetables, has distinctive Chinese characteristics. It is a facility unique to our country. The structure of solar greenhouses varies from place to place, and there are many classification methods. As the main body of my country's protected agriculture industry, the "solar greenhouse" industry has become the most profitable industry in agricultural planting in the past 20 years. It solves the long-term off-season supply of vegetables in winter in northern my country, increases farmers' income, saves energy, promo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042
CPCG05B19/042
Inventor 杨敬华
Owner 中国农业科学院农业经济与发展研究所
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