보통형 콤바인 부착용 유채 예취장치 개발(II) - 유채 수확 적응성 평가 -

이충근,최용,장영석,정용수,이승규,이왕돈,Lee, Choung-Keun,Choi, Yong,Jang, Young-Seok,Jung, Young-Su,Lee, Seung-Kyu,Lee, Wang-Don 한국농업기계학회 2009 바이오시스템공학 Vol.34 No.1

A rapeseed reaping equipment attachable to a conventional combine was developed in order to harvest rapeseed for bio-diesel materials. This study was carried out to measure the harvest feasibility of a prototype combine in rapeseed fields. Grain, stem and pod flow rate, grain qualities (whole kernel, damaged kernel, unhulled kernel, material-other-than-grain) and grain loss rates (header, threshing, separation) were investigated in each field test. As the result of the fold test, the average grain flow rates of SUNMANG and MS varieties showed 1,430 kg/h and 2,038 kg/h, respectively. The average stem and pod flow rates showed 3,443 kg/h and 6,596 kg/h, respectively. In each working speed, the average whole kernel rate and the material-other-than-grain showed 99.9% and below 0.08%, respectively. In the average grain loss, the rates showed 5.66% in case of SUNMANG and 5.94% in MS. Header loss was higher than other parts for SUNMANG. However, threshing loss was relatively higher than other parts for MS. Header loss rate due to side cutter knifes, however, was not so high when compared with a grain loss due to the cutter bar. Effective field capacity and field efficiency of the prototype combine showed 0.389 ha/h and 44%, respectively. Comparison of customary combine with the prototype combine through field test demonstrated that the header loss was reduced by 69.3% when the prototype combine was used.

국내 자탈형 콤바인의 보급 현황과 주요성능 비교 분석

이충근 ( Choung Keun Lee ),최용 ( Yong Choi ),최덕규 ( Duck Kyu Choi ),강태경 ( Tae Gyoung Kang ),전현종 ( Hyeon Jong Jun ),최일수 ( Il Su Choi ),박태종 ( Tae Jong Park ) 한국국제농업개발학회 2015 韓國國際農業開發學會誌 Vol.27 No.1

When the supply status and main performance of the head feeding combines in Korea were compared and analyzed as a view point of the researchers and farmers, the results that were shown as the below. Although the supply units of head feeding combines were peaked as 10,000 units per year in 2,000, those are recently staying about 3,000 units per year because of the reduction of cultivation area, and the high performance and enlargement of head feeding combine. In the supply model of head feeding combines, the four rows model was mainly supplied in 2,000 but currently the five rows model is the most popular because of the enlargement of it. The work efficiency, rated horse power and main dimension of head feeding combines were improved according to the increased number of cutting device. However, it is necessary to improve the efficiency of threshing and sorting for the amount of increased harvesting, because the work efficiency of some four, five and six rows of head feeding combines, which was built up based on the four rows of head feeding combines, were similar to each other. The loss of grains, damaged grains and the material other than grains in harvesting, threshing and sorting for the head feeding combines became less than 1%, except some models. Finally, when the farmers select the head feeding combines, it is necessary to consider the farm scale, work efficiency, and policy institutional changes. The researchers have to develop the technology which is needed to the demand of consumers and the changes in the agricultural environment.

연구논문 : 미국과 일본의 정밀농업기계기술 연구동향 분석

이충근 ( Choung Keun Lee ),정인규 ( In Gyu Jung ),성제훈 ( Je Hoon Sung ),김학진 ( Hak Jin Kim ),우메다미키오 ( Mikio Umeda ) 한국국제농업개발학회 2005 韓國國際農業開發學會誌 Vol.17 No.2

국내 이앙기 보급현황과 주요성능 비교 분석

이충근 ( Choung Keun Lee ),최용 ( Yong Choi ),최덕규 ( Duck Kyu Choi ),강태경 ( Tae Gyoung Kang ),전현종 ( Hyeon Jong Jun ),최일수 ( Il Su Choi ),박태종 ( Tae Jong Park ) 한국국제농업개발학회 2015 韓國國際農業開發學會誌 Vol.27 No.1

Comparative analysis of the general distribution status and major performance for rice transplanters in Korea provided the following results. Distribution number of rice transplanter has remained the 5 thousand units currently a big decrease from 46 thousand units in 1997, due to high performance and larger domestic rice transplanter. Distribution models were mainly 4 rows in 1997, but 6 rows were accounted for 85% in 2014. Work efficiency showed 38 ~ 59a/h in the case of 6 rows and varied greatly depending on the rated power output. Missed hill ratios were 2.5% or less, except that hill seeding type rice transplanters were not correlated with an increase in number of seedling hills. Finally, farmers must take missed hills, work efficiency, convenience of the move and price into account, when choosing a rice transplanter. And selection of rice transplanter is important, and should consider support of the agriculture-friendly environment. The researchers should develop technologies such as autonomous straight apparatus that would overcome the differences in the skill of the workers, and high performance 8 row rice transplanters of ultra-light weight.

탄소중립시대 시설원예의 과제와 해결 방안

이충근(Choung-Keun Lee) 한국원예학회 2022 한국원예학회 학술발표요지 Vol.2022 No.11

연구논문 : 사회과학; 일본의 과수 재배의 일반현황과 기계화 동향

이충근 ( Choung Keun Lee ),최용 ( Yong Choi ),강태경 ( Tae Kyoug Kang ),전현종 ( Hyeon Jong Jun ),최일수 ( Il Soo Choi ) 한국국제농업개발학회 2013 韓國國際農業開發學會誌 Vol.25 No.2

일본의 과수 재배 일반현황과 기계화 동향을 살펴본 결과, 일본의 과수 재배면적과 농가 수는 점점 줄고 있으나 호당 경지면적은 증가하고 있고, 특히 3 ha 이상의 대규모 재배농가가 증가하고 있었다. 주요 과수작목의 10 a 당 평균 노동시간은 300시간으로 벼 재배의 약 10배 이상을 보였으며, 포도가 가장 긴 455시간을 보였고, 감이 가장 짧은 186시간을 보였다. 과수 기계화율 향상을 위해서는 첫째로 재배측면에서 농기계가 자유롭게 작업할 수 있는 재배양식의 표준화, 저수고화를 포함한 수체의 콤팩트화, 수형의 규격화 등 재배환경의 최적화가 우선되어야 할 것으로 판단되었다. 재배양식의 표준화는 차세대형 기계화는 물론 이미 개발된 기술을 실용화함에 있어서 필수 불가결한 조건이기 때문이며, 재배양식 다양성이 기계의 보급대수를 제한하고 제조비용을 높게 만들어 보급이 진행되지 못하게 막는 방해 요인이 되기 때문이다. 수체가 콤팩트하게 된다면 기계도 소형화 될 수 있고, 에너지와 기계 비용도 개선할 수 있는 장점이 있다. 또한 수체 피복형 작업기가 실현가능하게 되어 환경보전형 방제기와 각종 작업의 로봇화에도 크게 공헌 할 수 있기 때문이다. 더욱이 수형의 규격화가 진행됨으로서 기계개발의 가능성이 크게 넓어질 것이다. 즉, 노력이 가장 많이 들고 있는 전정과 적과, 수확 등의 기계화 여부는 수형의 콤팩트화와 규격화에 달려 있다고 해도 과언이 아니기 때문이다. 둘째로 기계측면에서는 노동력 부족 해결을 위해 전정·제초로봇, 친환경 방제용 기계, 수확 운반기계의 개발이 추진되어야 할 것으로 판단되었다. 그리고, 고령 농업인들을 위한 농작업 부하경감을 위해 파워 어시스트 슈트의 개발과 허리, 손, 무릅에 부담이 가는 작업의 부담경감을 위해 동작 패턴을 기억하여 재현 가능한 기술의 개발 등이 이루어져야 할 것으로 판단되었다. As a result of examining fruit culture general status and mechanized trends in japan, fruit cultivation area and the number of farms is decreasing gradually. But arable land per household is increasing; the proportion of large-scale farmers more than 3 ha is increasing significantly compared with 5 years ago. Average working hours are 300 hours per 10 a shows about 10 times more than the cultivation of rice. Grape has shown the longest time 455 hours, persimmon showed the shortest time as 186 hours. Mechanization of fruit growing in Japan is about the same level as Korea, such as pesticides and weeds control work have been mechanized until now, however harvesting mechanization is more required. In order to promote the mechanization of fruit cultivation was required on a priority basis approach from the side of cultivation. In other words, the standardization of cultivation method, the compactification and patterning of a tree shape was considered to be the first. And, to resolve labor shortages the development of pruning-weeding robot, eco-control machinery and harvesting-conveyance machinery was considered necessary in terms of the machine. To reduce agricultural work load for older farmers, the power assist suit and the reproduction technologies of behavior patterns need to be developed.

고온기 멜론 시설재배 시 자재별 차광 효과

이재한,이중섭,권준국,여경환,방지웅,김진현,이충근,박경섭,명동주,Lee, Jae Han,Lee, Jung Sup,Kwon, Joon Kook,Yeo, Kyung Hwan,Bang, Ji Woong,Kim, Jin Hyun,Lee, Choung Keun,Park, Kyoung Sub,Myung, Dong Ju 한국생물환경조절학회 2021 생물환경조절학회지 Vol.30 No.4

고온기 시설멜론 재배 시 저비용 고효율의 개발하기 위하여 차광 자재별 이용 효과를 구명하고자 수행하였다. 차광처리에 따른평균온도는 무차광이 36.6℃, 차광도포제는 34.5℃, 백색차광망은 34℃로 조사되었다. 도포제 살포 직후에 투광률이 무차광에 비해서 차광 도포제 처리구는 69%, 백색차광망 처리구는 75% 이었으나, 40일 및 80일 후 차광 도포제 처리구의 투광률이 각각 92% 및 98%로 높아져 처리된 차광도포제가 서서히 제거되는 것을 알 수 있었으며, 백색차광망 처리구는 시간의 경과에 따른 투광률의 변화가 거의 없었다. 생육에 있어 엽수는 처리 간에 차이가 없었고, 초장은 무차광에 비해 백색차광망과 차광도포제 처리구에서 높게 나타났다. 엽중, 생체중, 건물중의 경우 차광 처리구에 비해서 무차광에서 정식 42일 후에는 더 무거운 것으로 나타났다. 총 상품수량은 무차광에 비해서 백색차광망과 차광도포제가 각각 6% 및 5% 증수되었다. 따라서 고온기 간편하게 온도를 낮출수 있는 방법으로 차광도포제는 효과적이나 서서히 제거되기 때문에 재배 시기를 고려해서 사용하는 것이 바람직하다고 생각되었다. This Experiment was conducted to determine the effects of light shield materials when melon grown inside a plastic greenhouse in summer season. The average temperatures were 36.6℃, 34.5℃ and 34.0℃ respectively for the control(non-shield), coating agent, and the white net. The light transmittances were 69% and 75%, respectively inside the greenhouse treated with the coating agent and white net immediately after applicants, compared with that inside the control greenhouse. At the 40 and 80 days after treatment, the light transmittances for the coating agent were 92% and 98%, respectively, indicating it was slowly decomposed and removed, but there was no change in the transmittance for the white net. While the leaf number did not differ among the treatments, the plant height was higher in the white net and shading agent than in control. The weight of the leaves, fresh-weight and dry-weight were no different from that of shading, but it became heavier in the later stages. The marketable fruit yield was increased by 6% for white nets and 5% for the coating agent compared to control, there was no statistical significance. Therefore, coating agent is considered as an effective method to lower temperature during high temperature period, but it is preferable to use it in consideration of cultivation period, because the coating agent is gradually removed.

수박 수직재배용 과실 받침 장치 개발 및 설치 효과

김승유(Seung Yu Kim),서태철(Tae Cheol Seo),조명환(Myeong Whan Cho),최만권(Man Kwon Choi),이충근(Choung Keun Lee),강연구(Yeon Ku Kang) 한국원예학회 2022 한국원예학회 학술발표요지 Vol.2022 No.5

온실 환기팬 날개 형상별 환기성능 분석

김진구 ( Jin-gu Kim ),박석호 ( Seok-ho Park ),이태석 ( Tae-seok Lee ),이재한 ( Jae-han Lee ),이충근 ( Choung Keun Lee ) 한국농업기계학회 2021 한국농업기계학회 학술발표논문집 Vol.26 No.2

본 연구는 농업시설 환기에 사용되는 환기팬의 날개 형상별 공기유동성능 차이를 알아보기 위하여 실시되었다. 동일한 환풍기에 형상이 각각 다른 날개를 설치하여 입력 주파수를 변화시키며 소비전류, 소비전력, 역률, 풍량 및 풍속분포, 소음 등을 측정하였다. 시험에는 날개 지름이 50cm로 동일하고, 날개 단면 형상에 차이가 있으며, 날개 엽수가 각각 3개, 4개 6개인 3종류의 날개를 사용하였다. 날개 구동을 위하여 3상 4극 유도전동기로 구동되고 벨마우스 타입의 덕트가 설치된 환풍기를 선정하여 날개를 교체하며 전력특성과 공기유동성능 등을 조사하였다. 전원 입력측에 슬라이닥스와 주파수변환기를 설치하여 전압과 주파수를 조절하였고 전력계와 전류계를 설치하여 역률을 계산하였다. 공기유동성능을 알아보기 위하여 환풍기 공기 유입 측에 풍량계를 설치하고 공기 배출 측에 풍속계를 설치하여 날개 형상별 공기 유량과 풍속 분포를 조사하였다. 시험 결과 6엽 날개 기준 전원 주파수를 30Hz에서 60Hz로 변화시키는 동안 날개의 분당 회전수는 920회에서 1754회로 91% 증가되었고, 풍량은 2420m3/h에서 4730m3/h 로 95% 증가되었으며, 소비전력은 122W에서 512W로 420% 증가되었다. 날개 엽수별 소비전력은 3엽, 4엽, 6엽 각각 정격 220V, 60Hz 전원 인가 시 590W, 390W, 512W가 소비되었는데 이는 서로 다르게 설계된 날개 단면 형상에 따른 공기저항에 따라 모터에 가해지는 부하량이 다르기 때문이다. 날개 엽수별 풍량은 3엽, 4엽, 6엽 각각 5710m3/h, 5070m3/h, 4730m3/h로 나타나 소비전력 대비 공기 유동량 비율은 각각 9.7, 13.0, 9.2 (m3·h-1/W) 로 나타났다.

부분경운 콩 파종기 개발 및 파종특성 분석

강태경 ( Tea Gyoung Kang ),최용 ( Hyeon Jong Jun ),최일수 ( Yong Cho ),전현종 ( Iil Soo Choi ),이충근 ( Choung Keun Lee ),김건엽 ( Gun Yeob Kim ),이정태 ( Jung Tae Lee ) 한국국제농업개발학회 2015 韓國國際農業開發學會誌 Vol.27 No.2

Recent growing about global warming has led to increase the need for low-carbon, green growth policy at the agricultural sectors and interest in the environmental-friendly and organic products. Therefore, Korea government has decided to reduce the use of chemical fertilizer at the farm field up to 40% and in order to attain this goal, promoting to grow green manure crops has been taken into positive consideration in terms of maintaining soil fertility and preventing soil loss. To this result, the acreage to cultivate green manure crops has been sharply increased from 4,000ha in 1998 to 225,000ha in 2012. Regarding environment-friendly agriculture, bulk of rice straw should be incorporated into the paddy just after harvest as soil cover materials and also green manure crops, such as chinese milk vetch, rye, Hairy vetch and so on have been recommended to be grown annually as soil cover crops. General sowing process of a certain seed crop at the farm field consists of plowing, harrowing, seeding, covering up seeds with soil in order. This process at the field has been known to take relatively long time and even not to be equal at the seeding depth. For this reasons, new seeding technology has been continuously required by farmers. Partial-tillage seeder consisting of dressing furrow and seeding parts enable to overcome germination barriers. Two soybean cultivars, ‘Taekwang’ and ‘Shingi’ were used to test the performance of newly-developed seeder and its establishment rate showed around 70 ~ 90% with given interval of embedded soybeans. Furthermore, the partial tillage technology applicable to the soybean field could reduce labor cost by 69% as well as 22% of the fuel consumption and also promote soybean productivity per unit area.