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김동억,박노복,홍순중,강동현,우영회,이종원,안율균,한신희,Dong Eok, Kim,Nou Bog, Park,Sun Jung, Hong,Dong Hyeon, Kang,Young Hoe, Woo,Jong Won, Lee,Yul Kyun, Ahn,Shin Hee, Han 국립한국농수산대학교 교육개발센터 2022 현장농업연구지 = Journal of practical agricultural resear Vol.24 No.4
Growing agricultural products in greenhouses controlled by creating suitable climatic conditions and root zone of crop has been an important research and application subject. Appropriate environmental conditions in greenhouse are necessary for optimum plant growth improved crop yields. This study aimed to establish web-based remote monitoring system which monitors crops growth environment and status of crop on a real-time basis by applying to greenhouses IT technology connecting greenhouse equipment such as temperature sensors, soil sensors, crop sensors and camera. The measuring items were air temperature, relative humidity, solar radiation, CO<sub>2</sub> concentration, EC and pH of nutrient solution, medium temperature, EC of medium, water content of medium, leaf temperature, sap flow, stem diameter, fruit diameter, etc. The developed greenhouse monitoring system was composed of the network system, the data collecting device with sensors, and cameras. Remote monitoring system was implemented in a server/client environment. Information on greenhouse environment and crops is stored in a database. Items on growth and environment is extracted from stored information, could be compared and analyzed. So, A integrated monitoring system for smart greenhouse would be use in application practice and understanding the environment and crop growth for smart greenhouse management. sap flow, stem diameter and pant-water relations
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),김봉수(Bong-soo Kim),김현배(Hyun-bae Kim),윤용철(Yong-cheol Yoon),김치호(Chi-ho Kim),김현태(Hyeon-tae Kim) 충남대학교 농업과학연구소 2012 농업과학연구 Vol.39 No.4
The objective of this study is to observe growth pattern of grand rapids(lettuce) according to different experimental conditions for minimizing its growth period such as composition of nutrient, irradiation time of light source and cultivation mode. The culture of water spray type using seeds of grand rapids was performed during growth period of total 50 days. Experimental conditions consist of five compositions of nutrient (PW 0.5 mS/㎝, PW 1.0 mS/㎝, PY 0.5 mS/㎝, PY 1.0 mS/㎝, PW 2.0 mS/㎝) and three irradiation times of light source (12h(on) / 12h(off), 18h(on) / 06h(off), 24h(on) / 00h(off)). Illumination was adjusted to ratio of 7:1:1 of red, blue and white color, respectively. Indoor environmental condition for cultivating grand rapids is as follows: temperature (19-22℃), relative humidity (60-70%) and carbon dioxide (1,000-1,200 ppm). The data were obtained from five iteration tests. The maximum growth level was observed in the experimental condition of 18 hr(on) / 06 hr(off) and PY 1 mS/㎝ for 1st week of cultivation period, 24 hr(on) / 00 hr(off) and PY 1mS/㎝ for 2nd week of cultivation period, and 24 hr(on) / 00hr(off) and PW 1 mS/㎝ for 3rd week of cultivation period, respectively. On the contrary, the minimum growth level was observed in the experimental condition of 18 hr(on) / 06 hr(off) and PW 0.5 mS/cm for 1st week of cultivation period, 12 hr(on) / 12 hr(off) and PW 0.5 mS/㎝ for 2nd week of cultivation period, and 12 hr(on) / 12 hr(off) and PY 0.5 mS/㎝ for 3rd week of cultivation period, respectively. Based on the results obtained from this study, it is concluded that the growth level of grand rapids varied with different irradiation time of light source and composition ratio of nutrient according to cultivation period.
기계시각을 이용한 대립종자의 씨눈위치 판정알고리즘 개발
김동억(Dong Eok Kim),손재룡(Jae Ryong Son),장유섭(Yu Seob Chang),장익주(Ik Joo Jang) (사)한국생물환경조절학회 2004 생물환경조절학회지 Vol.13 No.2
대립종자의 자동정렬파종기의 씨눈위치 자동판정장치를 개발하기 위한 연구로서 수행된 이 연구는 기계시각을 이용하여 대립종자의 씨눈 위치가 공급 방향을 기준으로 앞 또는 뒤쪽 어느 쪽에 위치해 있는지를 검출하기 위함이다. 참박, 특토좌, 흑종에 대한 씨눈위치를 판정하기 위하여 종자의 공급자세에 따른 판정정도를 조사하였다. 참박의 경우 공급자세가 30°일 경우에는 77.8%의 정확도를 나타냈지만, 0°와 15°일 때는 100% 검출 정확도를 나타내었다. 특토좌의 경우 공급자세 30°에서 89.5%, 0°와 15°에서는 100%의 판정 정확도가 나타났다. 흑종의 경우에 있어서는 공급자세 30°에서 94.4%이었고 나머지는 100%의 정확도를 나타냈다. 따라서 정렬파종장치의 공급부에서 종자가 공급될 때 기계적인 메카니즘으로 30° 이상 기울어지는 것을 방지할 수 있고 15°까지 기울어진다 해도 씨눈위치를 판정할 수 있기 때문에 향후 파종장치의 한 부분으로서 사용할 수 있을 것으로 판단되었다. This study was conducted to develop an algorithm for the embryo location in seed by using machine vision. The topic of this research is to detect the embryo location in seed regardless of seed supply direction. In order to detect the embryo location in Cham Bak, Tuktojwa and Hukjong, the effect of seed posture in the supply line was investigated. When the seed posture angle of Chambak from horizontal direction was 30°, the detection accuracy for embryo location was 77.8%, while detection accuracy was 100% for the 0° or 15°. When seed posture angle of Tuktojwa was 30° from the horizontal direction, the detection accuracy was 89.5% and it was 100% for the 0° and 15°. Embryo location detection accuracy for the Hukjong was 94.4% when the seed posture angle from the horizontal direction is 30°, and it was 100% for the 0° and 15°. When seeds are fed into the posturing and seeding line, the seed postures within 30° with mechanical means, and at most 15° seed stand posture, the developed algorithm can detect the embryo position in the seed. So, this embryo detection system is very useful tool in the posturing and seeding line.