• Title/Summary/Keyword: Greenhouse-control system

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Implementation of Complex Growth-environment Control System in Greenhouse (온실 복합생장환경 관제 시스템 구현)

  • Cho, Hyun Wook;Cho, Jong Sik;Park, In Gon;Seo, Beom Seok;Kim, Chan Woo;Shin, Chang Sun
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.7 no.1
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    • pp.1-9
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    • 2011
  • In this paper, Wireless sensor network technology applied to various greenhouse agro-industry items such as horticulture and local specialty etc., we was constructed automatic control system for optimum growth environment by measuring growth status and environmental change. existing monitoring systems of greenhouse gather information about growth environment depends on the temperature. but in this system, Can be efficient collection and control of information to construct wireless sensor network by growth measurement sensor and environment monitoring sensor inside of the greenhouse. The system is consists of sensor manager for information processing, an environment database that stores information collected from sensors, the GUI of show the greenhouse status, it gather soil and environment information to soil and environment(including weather) sensors, growth measurement sensor. In addition to support that soil information service shows the temperature, moisture, EC, ph of soil to user through the interaction of obtained data and Complex Growth Environment information service for quality and productivity can prevention and response by growth disease or disaster of greenhouse agro-industry items how temperature, humidity, illumination acquiring informationin greenhouse(strawberry, ginseng). To verify the executability of the system, constructing the complex growth environment measurement system using wireless sensor network in greenhouse and we confirmed that it is can provide our optimized growth environment information.

Control of Automated Greenhouse Based on a PC (PC 기반 자동화 시설 하우스 제어)

  • 김기환
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.53 no.9
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    • pp.644-649
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    • 2004
  • To control a greenhouse is to control environmental parameters in greenhouse. Controlled environments may be as simple as saran-covered shade houses or as complex as growth chambers. Although greenhouses are probably the most common example of a controlled environment used in agricultural/horticultural production, the type of controlled environment or system that is needed depends upon the climate, time of year, crops being produced and the environmental parameters that must be controlled. In this contribution puts emphasis on construction of automatic-controlled greenhouse system by personal computer.

Development of an Automatic Water Control System for Greenhouse Soil Water Content Management (시설재배 토양의 수분 조절을 위한 자동 수분제어시스템 개발)

  • Lee, D.H.;Lee, K.S.;Chang, Y.C.
    • Journal of Biosystems Engineering
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    • v.33 no.2
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    • pp.115-123
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    • 2008
  • This study was conducted to develop an automatic soil water content control system for greenhouse, which consisted of drip irrigation nozzles, soil water content sensors, an on/off valve, a servo-motor assembly and a control program. The control logic adopted in the system was Ziegler-Nichols algorithm and rising time, time constant and over/undershoot ratio as control variables in the system was selected and determined by various control experiments to maintain small delay time and low overshoot. Based on the experimental results, it was concluded that the control system developed in the study could replace the unreliable conventional greenhouse soil water management.

Environmental Control of Plant Production Factory Using Programmable Logic Controller and Computer (PLC와 컴퓨터를 이용한 식물생산공장의 환경제어)

  • Kim Dong-Eok;Chang Yu-Seob;Kim Jong-Goo;Kim Hyeon-Hwan;Lee Dong-Hyeon;Chang Jin-Taek
    • Journal of Bio-Environment Control
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    • v.15 no.1
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    • pp.1-7
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    • 2006
  • This study was conducted to develop a system and an control algorithm for control the environment of a plant factory. The greenhouse control system for environmental control was largely composed of a computer and a PLC. The screen of control program was composed of a greenhouse figure which was included machinery and equipments for greenhouse, the graph of environmental factors of inside greenhouse and the image of greenhouse. In order to reduce temperature change, the operation time of ventilation window was changed by 3 stage according to difference between a target and present temperature. When is heating, a temperature variation was shown to be $16.7{\pm}0.8^{\circ}C$. When is cooling, a temperature variation was shown to be $23.1{\pm}0.6^{\circ}C$. When is humidifing, a humidity variation was shown to be $39.3{\pm}1.6^{\circ}C$ %RH. An environmental control system and a control algorithm were proved that it was shown a good performance in a control accuracy. So a computer control system should be adapted to a control system of a greenhouse and a plant factory.

Fundamental Studies for the Automatic Control System in the Greenhouse Using Microcomputer(II) -A Development of a Controller for an Automatic Control System- (마이크로컴퓨터에 의한 시설재배의 자동화에 관한 기초연구(II) -자동화 시스템의 종합제어기 개발-)

  • 김진현;김철수
    • Journal of Biosystems Engineering
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    • v.20 no.1
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    • pp.73-86
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    • 1995
  • The automatic control system in the greenhouse have to be developed to the direction of considering various factors the variables such as condition of the cultivation and greenhouse, the properties and types of products. Therefore, it is more important to set up variables appropriately than the problems of automatic control system itself, and the automatic control system which satisfy these problems should be simplified in the aspect of operation. In addition, even the individual automations are not perfect yet, so more studies are required for the development of comprehensive automatic system in korea. This study was carried out to automatize environment control systems for greenhouse, especially from most intensive labor requiring parts such as watering, irrigating liquefied fertilizer, spraying chemicals, mixing and ventilation system, etc. The results are summarized as follows. 1. Control type tensiometer was expected to be desirable in the automation of watering system, therefore, a new tensiometer was designed and developed through this study. 2. The chemical spraying system developed through this study was found to be excellent in the aspect of operation. 3. When pulse type water discharge meter was used in the mixing of liquefied fertilizer and chemical solution, the error of mixing were range $\pm$0.1~0.15%. 4. The water level switch of electrod type used for controlling water level was found to be affective in both control performance and operation cost. 5. The water and level control system can be omitted if each tank size are standardized in accordance with greenhouse size, therefore, the installation cost might be significantly reduced. 6. The developed general controller was excellent in hardware parts, but still remained to be improved in software parts.

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Implementation of Greenhouse Environment Monitoring System based on Wireless Sensor Networks (무선센서네트워크 기반 온실환경 모니터링 시스템 구현)

  • Lee, Young-Dong
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.17 no.11
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    • pp.2686-2692
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    • 2013
  • In this paper, various growth environment data collecting and monitoring based on wireless sensor network for greenhouse environmental monitoring system is designed and implemented. In addition, greenhouse control system is proposed to integrated control and management in internal environment and greenhouse facilities. The system provides real-time remote greenhouse integrated management service which collects greenhouse environment information and controls greenhouse facilities based on wireless sensor network. Graphical user interface for an integrated management system is designed based on the HMI and the experimental results show that the sensor data were collected by integrated management in real-time.

A Study on the Control of the Temperature and Relative Humidity in Greenhouse by Adjusting the Amount of Natural Ventilation and Fog Spray Quantity (자연환기량과 포그분무량 조절에 의한 온실 온습도의 동시제어 기법 연구)

  • Kim, Youngbok;Sung, Hyunsoo;Hwang, Seungjae;Kim, Hyeontae;Ryu, Chanseok
    • Journal of the Korean Solar Energy Society
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    • v.36 no.5
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    • pp.31-50
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    • 2016
  • To develope a greenhouse fog cooling system to control the temperature and relative humidity simultaneously to the target value, a theoretical analysis and experiments were done. The control process includes the measuring of environmental variables, setting and coding of the water and heat balance equations to maintain the target temperature and relative humidity in greenhouse, calculating of the open level of the greenhouse roof window that governs the natural ventilation and spray water quantity, and operating of the motor to open/close the roof window and pump to spray for water. The study results were shown to be very good because the average air temperature in the greenhouse was kept to be about $28.2^{\circ}C$ with the standard deviation of about $0.37^{\circ}C$ compared to the target temperature of $28^{\circ}C$ and the average relative humidity was about 75.2% compared to the target relative humidity was 75% during the experiments. The average outside relative humidity was about 41.0% and the average outside temperature was $27.2^{\circ}C$ with the standard deviation of about $0.54^{\circ}C$. The average solar intensity in the greenhouse was 712.9 W. The wind velocity of outside greenhouse was 0.558 m/s with the standard deviation of 0.46 m/s.

Real-Time Transmission System for Greenhouse Information Using MQTT and RTSP (MQTT와 RTSP를 통한 온실 정보의 실시간 전송 시스템)

  • Kim, Dong-Eon;Kim, Seong-Woo;Kwon, Soon-Kak
    • Journal of Korea Multimedia Society
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    • v.18 no.8
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    • pp.935-942
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    • 2015
  • According to growing of the plant cultivation in a greenhouse environment, the demand of a system to control the greenhouse easier has increased. Currently, the methods to control by the mobile App represent the information in a greenhouse environment with a simple numerical data or compose only the contents with a limited degree of freedom. In order to solve these problems, this paper presents a system that can be viewed or controlled greenhouse conditions in near / remote distance using augmented reality and MQTT communication protocol, RTSP media streaming protocol. The proposed method is implemented in Android smartphone environment and acts monitoring the information (temperature, humidity, illuminance) obtained by greenhouse's sensors and transmits the real time greenhouse's video using RTSP in the remote distance, and controls the values of temperature, humidity, illuminance for the greenhouse using the augmented reality in the near distance.

Development of Fog Cooling Control System and Cooling Effect in Greenhouse (온실 포그 냉방 제어시스템 개발 및 냉방효과)

  • Park, Seok Ho;Moon, Jong Pil;Kim, Jin Koo;Kim, Seoung Hee
    • Journal of Bio-Environment Control
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    • v.29 no.3
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    • pp.265-276
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    • 2020
  • This study was conducted to provide a basis for raising farm income by increasing the yield and extending the cultivation period by creating an environment where crops can be cultivated normally during high temperatures in summer. The maximum cooling load of the multi-span greenhouse with a floor area of 504 ㎡ was found to be 462,609 W, and keeping the greenhouse under 32℃ without shading the greenhouse at a high temperature, it was necessary to fog spray 471.6 L of water per hour. The automatic fog cooling control device was developed to effectively control the fog device, the flow fan, and the light blocking device constituting the fog cooling system. The fog cooling system showed that the temperature of the greenhouse could be lowered by 6℃ than the outside temperature. The relative humidity of the fog-cooled greenhouse was 40-80% during the day, about 20% higher than that of the control greenhouse, and this increase in relative humidity contributed to the growth of cucumbers. The relative humidity of the fog cooling greenhouse during the day was 40-80%, which was about 20% higher than that of the control greenhouse, and this increase in relative humidity contributed to the growth of cucumbers. The yield of cucumbers in the fog-cooled greenhouse was 1.8 times higher in the single-span greenhouse and two times higher in the multi-span greenhouse compared to the control greenhouse.

A study on Distribution of Dry Bulb Temperature and Indoor Environment Control System of Paprika Greenhouse in Summer Season (여름철, 파프리카 재배온실에서 실내환경조절 시스템과 건구온도 분포에 관한 연구)

  • Kong, S.H.
    • Solar Energy
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    • v.19 no.1
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    • pp.59-65
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    • 1999
  • The zone of greenhouse in Korea increase on a scale yearly. Particularly, greenhouse take up a important value on the agriculture economy. Greenhouse of scale, material, heating system, and drain is progressing to industrialization. The dry bulb temperature, humidity, photosynthesis and so forth are necessary to maintain environment control of greenhouse. The dry bulb temperature among them greatly affects growing of a plant. The purpose of this study is to analyzed the indoor environment control system and the characteristic of dry bulb temperature distribution on a large scale greenhouse in summer season.

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