Decision-making Method and Control System for Uncovering/Covering Curtain Based on Multifactor Constraints

被引：0
|
作者：
Zhang J. [1 ,2 ]
Chen D. [1 ,2 ]
Zhang Z. [1 ,2 ]
Sun Z. [1 ,3 ]
Zhang M. [4 ]
Hu J. [1 ,2 ]
机构：
[1] College of Mechanical and Electronic Engineering, Northwest A&F University, Shaanxi, Yangling
[2] Key Laboratory for Agricultural Internet of Things, Ministry of Agriculture and Rural Affairs, Shaanxi, Yangling
[3] Shaanxi Key Laboratory of Agricultural Information Perception and Intelligent Service, Shaanxi, Yangling
[4] College of Horticulture, Northwest A&F University, Shaanxi, Yangling
来源：
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | 2022年 / 53卷 / 09期
关键词：
curtain uncovering/covering; decision-making method; multifactor constraints; solar greenhouse;
D O I：
10.6041/j.issn.1000-1298.2022.09.036
中图分类号：
学科分类号：
摘要：
The duration of light and the temperature in winter counter-seasonal production in solar greenhouses are generally unable to meet the growth demands of crops. Based on the temperature and light requirements for crop growth, the light equilibrium point to maintain a stable greenhouse temperature, the nighttime minimum temperature prediction model, and the empirical uncovering/ covering time were used as constraints. The method of uncovering decision with the constraints of crop low temperature limitation point, light compensation point (LCP), light balance point and empirical uncovering time, and the method of covering decision with the constraints of nighttime minimum temperature prediction model, crop low temperature limitation point, light compensation point and empirical covering time were proposed. A decision control system for the roller shutter was also constructed based on a wireless sensor network. The results showed that the decision-making method and control system of uncovering/covering curtain can effectively reduce the incidence of low temperature by 43 %. Compared with the empirical uncovering/covering curtain of the control greenhouse, the daily light duration of the experimental greenhouse was extended by 1. 25 h on average, and the accumulated light duration was increased by 75. 16 h, the product of thermal effectiveness and PAR was increased by 61. 41 MJ/m2, and the effective accumulated temperature was increased by 22. 28 °C, which effectively improved the heat and light duration of the greenhouse. The tomato plants in the test greenhouse were lower in height, which had thicker stems and performed more robustly, with significantly higher growth rates of leaf length and width than that in the control greenhouse. Statistical analysis of the first fruit yield, which was more influential during the trial, showed that the yield of the trial greenhouse was increased by 30. 74%, and the first harvest was earlier. It was proved that the proposed method and control system for decision-making of curtain uncovering/covering can promote crop growth and effectively increase the material accumulation of tomato, which provided an idea for decision making of rolling shutter uncovering in heliostat. © 2022 Chinese Society of Agricultural Machinery. All rights reserved.
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页码：354 / 364
页数：10
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