• Annual Conference of KIPS
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• 2023.11a
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• pp.128-129
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• 2023

해당 논문은 라즈베리파이를 이용한 온실의 온습도 자동제어 시스템에 관한 연구를 다룬다. 이 시스템은 특정 작물에 대한 최적의 생육환경 제공을 위해 자동으로 온도 및 습도를 측정하고 조절한다. 관리자는 수동으로도 각 기능을 제어할 수 있다. 온습도를 제어하기 위한 방법으로 자연환기, 인공환기, 온실내부 물분사, 열선작동의 방법을 사용한다. 자동화된 온습도 제어 시스템으로 농산물의 생산량 및 품질을 늘림과 동시에 온실 관리에 투자되는 자원을 줄일 수 있어 농업인들의 농업경쟁력을 향상시킬 수 있다.

• KIEAE Journal
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• v.10 no.6
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• pp.131-137
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• 2010

This study aims to know temperature and humidity handling ability of Hwang-To brick and traditional paper window's in mock-up room test. To achieve these goals, mock-up room test was carried out. The results are as follows. 1) There are no significant differences among specimen in temperature handling capacity. 2) Traditional paper windows are very sensitive when compared with glass window in humidity control. 3) Traditional paper windows have a big handling capacity in humidity control when vapors letting out in mock-up room. 4) Hwang-To brick case is more stable than other cases in relative humidity variances because it has more potential to contain humidity.

• The Journal of the Korea institute of electronic communication sciences
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• v.17 no.4
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• pp.729-738
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• 2022

Existing wardrobes have been used only for storing simple clothes. Since it has a function to store clothes, there is only one way to control the environment such as humidity or temperature, and there is only one way to purchase and store items such as a desiccant. In this paper, by increasing the convenience in the existing wardrobe, automatic temperature and humidity control and various convenient functions were added. In line with the smart home market and smart phone application market that have grown over the past several years, along with the development of a wardrobe with sensors, the temperature and humidity control function and other functions inside the wardrobe through Bluetooth pairing between the wardrobe and the smartphone can be customized to the user using a smartphone. Through the clothing selection function and the weather data in the application, we want to implement convenient functions such as the function of recommending clothes in the closet to match the weather.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.05a
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• pp.235-237
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• 2018

최근 IoT 센서 즉, 사물 인터넷 기반 기술에 대한 연구가 많이 진행되고 있으며, 다양한 제품들이 출시되고 있다. 대표적으로 홈 IoT 제품으로 가정에서 인터넷과 스마트폰 어플리케이션을 이용하여 가스 밸브, 보일러, 전등 등을 제어하는 것을 볼 수 있다. 하지만, 농업분야에서는 농작물 생산지의 환경 정보를 수집하고, 그에 맞춰 온습도 등을 제어하기 위해 관리자 혹은 생산자가 수동적으로 처리해야만 하는 단점이 존재하였다. 본 논문에서는 비닐하우스와 축산농가 등에서 사용할 수 있는 IoT 센서 기반 무인 관리 어플리케이션을 설계하고자 한다. 사용자가 비닐하우스 혹은 축산농가에 들어가지 않아도 사용자가 스마트폰 어플리케이션을 통해 모니터링 하면서 온습도를 조절하고, 센서의 고장 유무를 파악하여 교체시기를 알려 주는 등의 기능을 포함 한다.

• Journal of Bio-Environment Control
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• v.18 no.3
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• pp.215-224
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• 2009

A survey on the actual state of heating, cooling, ventilation, and air-flow and experimental measurement of temperature and humidity distribution in tomato greenhouse were performed to provide fundamental data required in the development of air-flow control technology. In single-span plastic houses, which account for most of 136 tomato greenhouses surveyed, roof windows, ventilation and air-flow fans were installed in a low rate, and installation specs of those facilities showed a very large deviation. There were no farms installed greenhouse cooling facilities. In the hot air heating system, which account for most of heating type, installation specs of hot air duct showed also a large deviation. The exhaust air temperature and wind speed in hot air duct also were measured to have a big difference depending on the distance from the heater. We are using the maximum difference as indicator to determine whether temperature distribution is uniform. However if the temperature slope is not identical in greenhouse, it can't represent the uniformity. We analyzed relation between the maximum difference and the uniformity of temperature and humidity distribution. The uniformity was calculated using the mean and standard deviation of data from 12 measuring points. They showed high correlation but were represented differently by linear in the daytime and quadratic in the nighttime. It could see that the uniformity of temperature and humidity distribution was much different according to greenhouse type and heating method. The installation guidelines for ventilation and air-flow fan, the spread of greenhouse cooling technology for year-round stable production, and improvement of air duct and heating system, etc. are needed.

• Journal of Bio-Environment Control
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• v.25 no.4
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• pp.277-282
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• 2016

This study was aimed to investigate the effect of air-circulation fans on air temperature and relative humidity in a single-span tomato greenhouse (W: 7m, L: 25m, H: 3.2m). According to standard of fan layout by ASAE (1997), a total of 10 fans were bilaterally arranged in 2 rows in the experimental greenhouse. The distributions of air temperature and relative humidity were measured from 6 pm to 8 am under different conditions, with and without fans. The measurement heights were 0.7m, 1.7m and 2.7m. Under the condition of "fans off", the spatial differences of air temperature and relative humidity between upper and lower sides were $1.7^{\circ}C$ and 10.8%, respectively. The operation of 10 fans showed their differences to $0.1^{\circ}C$ and 3.2%. The number of fans and installation direction were evaluated their performance on reducing the spatial variation of air temperature and relative humidity. The experimental layouts were 5 and fans in 2 rows (bilaterally) and 10 fans in the one (same) direction. Under the condition of "6 fans on" and "5 fans on", the spatial differences of air temperature and relative humidity between upper and lower side were $0.3^{\circ}C$, 3.4% and $0.3^{\circ}C$ and 4.0%. The operation of 10 fans in the one direction reduced their differences to $0.5^{\circ}C$ and 4.9%. The overall findings of this study showed that there was no significant differences under each condition. Therefore, this study suggested that it is more economic and effective to install five fans in 2 rows (bilaterally) in the greenhouse (W: 7m, L: 25m, H: 3.2m).

• Journal of Bio-Environment Control
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• v.2 no.1
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• pp.69-76
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• 1993

최근 작물의 공장적 재배는 $\boxDr$식물공장$\boxUl$이라는 단어로 대표되는, 새로운 재배방식의 하나로서 세계적으로 주목받고 있다. 식물공장(plant factory or factory- style plant production system)이라는 단어의 의미와 같이 $\boxDr$시설내의 작물을 공장제품의 생산과 동일하게 재배하는 시스템$\boxUl$이다. 즉 자연환경에 의존하지 않고 인공환경하에서 식물을 공장적으로 재배하는 방식을 의미한다. 이를 위해서는 지하부의 양액, 지상부의 온습도, 탄산가스, 광 등에 대한 고도의 환경제어 및 작업의 자동화가 필요하다.(중략)

• Annual Conference of KIPS
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• 2022.11a
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• pp.952-954
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• 2022

본 연구에서는 스마트 홈 솔루션 IoT 허브 시스템의 하드웨어를 개발한다. IoT를 통해 스마트기기의 상태를 모니터링하다가, 특정 센싱값을 받으면 제어를 통해 스마트기기를 제어할 수 있도록 개발한다. 미세먼지 측정과 온습도를 조절하고, 가정 온도를 측정하여 전자제품의 전원을 조절하는 등 홈을 자동 제어하기 위한 소프트웨어도 함께 개발한다.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.1417-1418
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• 2015

본 연구에서는 사용자 생체신호 및 주변 환경정보를 기반으로 스트레스 이완을 돕는 IoT 디퓨저 시스템 설계와 구성을 다룬다. 개발된 디퓨저는 스마트폰 어플리케이션과 연동되어 사용자의 맥박수를 전달 받고, 또한 내장된 온습도센서에서 측정된 사용자 주변 환경정보와도 연동되어 발향 및 조명 효과를 제공한다. 개발된 디퓨저 시스템은 사용자의 심박이 다소 빠르거나 사용자에게 스트레스를 줄 수 있는 온습도 환경이 감지되는 경우 스트레스 경감과 관련된 발향 및 조명색 제어를 통해 사용자의 스트레스 조절을 도울 수 있다.

• Journal of Bio-Environment Control
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• v.20 no.4
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• pp.394-398
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• 2011

The effect of two-fluid fogging system on the control of Bemisia tabaci in tomato cultivation was evaluated in a greenhouse. The number of Bemisia tabaci was decreased by 87% from the fog treatment for 7 days. During the fog treatment, the mean daily temperature was decreased by $2^{\circ}C$ and the mean daily relative humidity was increased by 3~4% as compared to the non-treatment. The reduction of Bemisia tabaci in the treatment might not be resulted from the differences in temperature and humidity in the greenhouse. The sound coming from the two-fluid fogging system did not affect when it was operated without water inside. Therefore it was concluded that water droplets coming out the nozzle reduced the growth and the movement of whiteflies because the suspension of tiny water droplets were attached on the skin of whiteflies.