• Journal of Bio-Environment Control
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• v.31 no.4
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• pp.438-443
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• 2022

In this study, the lateral loading test was performed to analyze structural performance of multi-span plastic greenhouse through full-scale experiment and numerical analysis. In order to analyze the lateral stiffness and stress, we installed 9 displacement sensors and 19 strain gauge sensors on the specimen, respectively, and load of l mm per minute was applied until the specimen failure. In the comparison between the full-scale experiment and the structural analysis results of a multi-span greenhouse with venlo-type roof according to bracing installation, there was a large difference in the lateral stiffness of the structure. By installing a brace system, the lateral stiffness measured near the side elevation of the specimen increased by up 44%. As the bracing joint used in the field did not secure sufficient rigidity, the external force could not be transmitted to the entire structure properly. Therefore, it is necessary to establish a bracing construction method and design standards in order for a greenhouse to which bracing applied to have sufficient performance.

• The KIPS Transactions:PartD
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• v.8D no.4
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• pp.427-438
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• 2001

Recently, Environmental Control Devices of Green House for Protected Cultivation is composed of on/off-type Controller to control each device using timer in equipment of intensive Labor. In case of system, it is difficult to grasp condition of the greenhouse about errors when this system has defect of a hardware, and it operates in the remote place or at night. In this paper, we developed a system that capable of replacing the existing control method of on/off with display panel in the greenhouse, monitoring data aquisition and status in the greenhouse using client computer based on internet. Also this system can communicate with each local greenhouse, and send alarm message about error. And we constructed web server to manage efficient informations for environmental control and corps cultivation in the greenhouse.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.12
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• pp.2315-2322
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• 2008

The requesting a consultation of the farm manager is about the diagnosis and prevention of the breeding and extermination for diseases and insects in greenhouse, the managing problem for diseases and insects turn up a main issue. To solve these problems, this paper proposes a PDA based greenhouse, diseases and insects management system for mobile(GDIMS) uses as keeping up with ubiquitous time, which makes prediction and management for diseases and insects more efficiently checked at any time and anywhere you want to, and go well with the motto of ubiquitous. This system is using the environmental data from the greenhouse attached sensors provide the accurate diagnosis and recipes, which supports to product clean crops. There are no need to visit the greenhouse because our system is based on mobile devices that obtain the information in the greenhouse, which makes management in efficient with little number of people. This wort builds simply virtual greenhouse model that assembles system component of environmental sensor for performance analysis and offers a PDA view of the greenhouse status.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2002.11a
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• pp.33-44
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• 2002

우리나라의 시설원예는 짧은 역사에 비하여, 괄목할 만한 성장을 거듭해 왔다. 특히 원예 산업이 농업 전체에서 차지하는 비중이 높아지면서 국가적인 차원에서 온실의 첨단화 및 대규모화가 추진되었고, 수준 높은 작물 재배기술 및 환경조절 기술 등이 도입되어 시설원예의 발전이 가능할 것으로 생각되었다. (중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1999.10a
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• pp.280-284
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• 1999

대기 중에는 $CO_2$, CH$_4$ 및 $H_2O$$_2$ 등 온실효과를 일으키는 가스가 포함되어 있고, 이들은 지구의 기온을 일정 수준으로 유지시켜 줌으로써 인간가 동식물에게 살기 좋은 환경을 제공한다. 그러나 산업 혁명 이후 화석 연료 및 화학 물질 사용 증가에 따라 $CO_2$, NOx 및 CFC, VOC 등의 온실가스는 다양한 경로를 통하여 대기 중으로 배출되고 이것은 지구 온난화의 원인이 되고 있다.(중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.11a
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• pp.425-426
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• 2003

지구온난화현상은 1980년대 들어서 급격한 기후의 변화와 이상난동 등의 기상이변이 발생하면서 세계적인 관심사로 대두되었다 전 지구적으로 온실가스의 배출량은 증가하고 있어, 이를 대처하기 위하여 1992년 브라질 리우에서 개최된 UN환경개발회의에서 기후변화협약을 체결하게 되었고, 특히 1997년 12월에는 일본의 교토에서 개최된 제3차 기후변화협약 당사국총회에서 선진국들은 1990년을 기준으로 2008 - 2012년간 온실가스를 평균 5.2％ 감축하도록 하는 교토선언을 결정하였다. (중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.04a
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• pp.129-130
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• 2002

지구온난화를 유발하는 온실효과기체의 대표적인 성분으로는 이산화탄소, 메탄, 프레온류, 아산화질소 등을 들 수 있으며, 각 성분의 대기 중 농도는 산업화의 진행에 따라 지속적이고 철저한 증가 추세를 보이고 있다. 이에 따라 지구 온난화 현상은 점차 가속화되는 경향을 보이고 있으며, 온실효과기체가 현재와 같은 증가율로 증가하게 되면 2030년대에는 지구 전체의 평균기온이 현재에 비해 약 1.5-3.5$^{\circ}C$ 상승하게 되고, 기후 변동, 생태계의 교란, 해수면 상승, 토양침식 증가 등의 결과가 예측된다. (중략)

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2002.07a
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• pp.310-315
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• 2002

겨울철 저온기에 온실의 작물재배는 많은 에너지가 소요되어 저온기의 에너지비용을 최소화하는 것이 온실의 운전비용의 절감과 이용효율이 증대되어 농가소득을 높일 수 있다. 저온기에는 작물의 수확량이 적정 온도조건의 80%수준으로 최소 에너지 투입방법 기술을 개발하여 수확량을 증대시킬 필요가 있다. 기존의 난방방법인 온수보일러는 온도유지 안정성은 좋으나 시설비용이 많이 들고 온풍난방은 설치비용은 저렴하나 온도 유지안정성이 다소 떨어지는 단점이 있다. (중략)

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1994.11a
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• pp.67-69
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• 1994

4계절이 뚜렷한 우리나라의 겨울철은 작물생산에 단경기이었으나, 플라스틱 하우스나 유리온실이 보급되면서 겨울철 단경기가 해소되었다. 그러나 이리한 시설들은 PE 또는 유리 등의 피복자재를 사용하여 여름철의 경우 막대한 일사부하로 온실 내부온도가 외부온도보다 높아져 작물생육에 열악한 환경을 조성한다. 이에 fog and pad system, fan and pad system 과 heat pump 등이 개발되어 있으나 실용적으로 도입되지 못하고 있는 실정이다. (중략)

• Journal of Bio-Environment Control
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• v.26 no.2
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• pp.87-99
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• 2017

Recently the increase in an abnormal climate events and meteorological disasters which causes a great damage to greenhouse facilities. To minimize and evaluate the expected damages it is necessary to prepare countermeasures and a management system in advance. For this purpose, a quantitative analysis of weather and abnormal climate are needed to investigate protected cultivation areas which are vulnerable to natural disasters. This study focused on protected cultivation areas in Jeolla province, South Korea. Surrogate variables were calculated to analyze the vulnerable areas to meteorological disasters, and spatial distribution analysis was also performed by using GIS to present vulnerable areas on map. The map thus created and was compared with actual data of damages by meteorological disasters which occurred in target areas. The result of the comparison is as follows: About 50% of the target areas showed an agreement between the map created in this study and the actual data, these areas includes Gwangju metropolitan city, Naju city, Yeongam County, Jangseong County, Hampyeong County, and Haenam County. On the other hand, other areas, including Gunsan city, Mokpo city, and Muan County, suffered low damage in spite of high levels of vulnerability to meteorological disasters. This result was considered to be affected by such variables as different structural designs and management systems of greenhouses by region. This study carried out an analysis of meteorological data to find out more detailed vulnerability to protected cultivation area and to create a map of vulnerable protected cultivation areas. In addition, the map was compared with the record of natural disasters to identify actual vulnerable areas. In conclusion, this study can be utilized as basic data for preventing and reducing damages by meteorological disasters in terms of design and management of greenhouses.