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논문 : 노외기계시스템공학 ; 소립종자용 평면배열 진공노즐식 반자동 파종기 개발에 관한 연구
김동억 ( Dong Eok Kim ),이공인 ( Gong In Lee ),강동현 ( Dong Hyeon Kang ),김유호 ( You Ho Kim ),이혜진 ( Hye Jin Lee ),김현환 ( Hyeon Hwan Kim ),김종구 ( Jong Ku Kim ),김용현 ( Yong Hyeon Kim ) 한국농업기계학회 2011 바이오시스템공학 Vol.36 No.6
A large scale seeding system was stable in terms of techniques but a convenient seeding system of small size was unsettled. This study was performed to develop a semi-automatic seeder for small and medium sized scale farm. To investigate optimum needle diameter and vacuum pressure was used vacuum suction needle seeder. Although the needle diameter according to the kinds of seed was different, the needle diameter for salvia and lettuce seed was suitable for 0.34 mm needle nozzle and 0.4 mm taper nozzle. The prototype consisted a seeding frame attached with needle nozzle, seed hopper, vibrating device, seeding part, vacuum ejector, seed tube etc.. As the result with the experiments, the seeding rate of the seeder was 92% and more at 0.34 mm diameter needle nozzle and 0.4 mm taper nozzle. Eccentric weight for seed hopper vibration was suitable that weight is 11 g and eccentric distance is 0.5 mm. Vibration acceleration of upward direction was 0.363 m/s2. Working capacity of the seeder was possible 160 trays per hour. It was possible for sowing small seeds but it was required to make compact and simple model.
김동억(Dong Eok Kim),장유섭(Yu Seob Chang),김종구(Jong Goo Kim),김현환(Hyeon Hwan Kim),이동현(Dong Hyeon Lee),장진택(Jin Taek Chang) (사)한국생물환경조절학회 2006 생물환경조절학회지 Vol.15 No.1
본 연구는 식물공장의 생육환경을 측정하고 제어하기 위한 하드웨어와 효과적인 환경제어 알고리즘을 개발하기 위하여 수행하였다. 환경제어를 위한 온실제어 시스템은 크게 컴퓨터와 PLC로 구성하였다. 환경제어 화변에는 온실 부대장치와 기기를 포함한 온실 그림과 온실내부의 기상환경 그래프 그리고 온실 영상을 나타내었다. 온도변화를 줄이기 위하여 환기창의 개폐시간을 설정값과의 온도편차에 따라 3단계로 조절되도록 하였다. 난방기 가동시의 제어편차는 16.7±0.8℃로 나타났고, 자연환기 시 제어편치는 23.1±0.6℃로 나타났다. 가습을 위해 가습기를 가동한 경우의 제어편차는 39.3±1.6%RH로 나타났다. 환경제어장치는 계측과 제어성능에 있어 좋은 성능을 보여 일반 온실과 식불공장의 제어시스템으로 적용할 수 있을 것으로 판단되었다. 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±0.8℃. When is cooling, a temperature variation was shown to be 23.1 ±0.6℃. When is humidifing, a humidity variation was shown to be 39.3℃ ± 1.6%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.
허정욱 ( Jeong Wook Heo ),김현환 ( Hyeon Hwan Kim ),이광재 ( Kwang Jae Lee ),윤정범 ( Jung Boem Yoon ),이정관 ( Joung Kwan Lee ),허윤선 ( Yoon Sun Huh ),이기열 ( Ki Yeol Lee ) 한국환경농학회 2015 한국환경농학회지 Vol.34 No.1
BACKGROUND: For commercial production of greenhouse crops under shorter day length condition, supplementary radiation has been usually achieved by the artificial light source with higher electric consumption such as high-pressure sodium, metal halide, or incandescent lamps. Light-Emitting Diodes (LEDs) with several characteristics, however, have been considered as a novel light source for plant production. Effects of supplementary lighting provided by the artificial light sources on growth of Kale seedlings during shorter day length were discussed in this experiment. METHODS AND RESULTS: Kale seedlings were grown under greenhouse under the three wave lamps (3 W), sodium lamps (Na), and red LEDs (peak at 630 nm) during six months, and leaf growth was observed at intervals of about 30 days after light exposure for 6 hours per day at sunrise and sunset. Photosynthetic photon flux (PPF) of supplementary red LEDs on the plant canopy was maintained at 0.1 (RL), 0.6 (RM), and 1.2 (RH) μmol/m2/s PPF. PPF in 3 W and Na treatments was measured at 12 μ mol/m2/s. Natural light (NL) was considered as a control. Leaf fresh weight of the seedlings was more than 100% increased under the 3 W, Na and RH treatment compared to natural light considering as a conventional condition. Sugar synthesis in Kale leaves was significantly promoted by the RM or RH treatment. Leaf yield per 3.3 m2 exposed by red LEDs of 1.2 μmol/m2/s PPF was 9% and 16% greater than in 3W or Na with a higher PPF, respectively. CONCLUSION: Growth of the leafy Kale seedlings were significantly affected by the supplementary radiation provided by three wave lamp, sodium lamp, and red LEDs with different light intensities during the shorter day length under greenhouse conditions. From this study, it was suggested that the leaf growth and secondary metabolism of Kale seedlings can be controlled by supplementary radiation using red LEDs of 1.2 μmol/m2/s PPF as well as three wave or sodium lamps in the experiment.