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저널/프로시딩 상세정보

권호별목차 / 소장처보기

H : 소장처정보

T : 목차정보

바이오시스템공학 = Journal of biosystems engineering 10건

  1. [국내논문]   친환경 정밀농업을 위한 입제 변량살포기 개발 (I) - 송풍식 입제 변량살포기 개념설계와 시작기 제작 -   피인용횟수: 6

    류관희 (Seoul National University ) , 김영주 (Graduate Student, Seoul National University ) , 조성인 (Seoul National University ) , 이중용 (Seoul National University)
    바이오시스템공학 = Journal of biosystems engineering v.31 no.4 = no.117 ,pp. 305 - 314 , 2006 , 1738-1266 ,

    초록

    Precision farming has been known as an environment friendly farming technology. This study was conducted to develop a variable-rate granule fertilizer applicator as an attempt for introducing the precision farming technologies to rice cultivation in Korea. In this paper, concept design process and manufacturing of prototype variable rate granule applicator was reported. For concept design, some design guide lines were selected. Based on the design guide line and some engineering knowledge, concept design was conducted. The designed prototype granule applicator was mounted at the rear of riding type cultivator for paddy field and had a 10m wide boom structure with pneumatic conveying and application system as well as 1GPS receiver, 1 granule hopper, 12 blow heads, 2 metering devices and 1 controller. The fertilizer applicator had 942 ka of weight, 740m of ground clearance and 1,117mm of center of gravity from the ground. The applicator was designed to be able to $34{\sim}428kg/ha$ of granule at $0.2{\sim}0.8m/s$ of fertilizer working speed.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

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  2. [국내논문]   비틀림 댐퍼를 이용한 PTO 전동 라인의 치타음 감소   피인용횟수: 1

    박영준 (Department of Biosystems and Biomaterial Science and Engineering, Seoul National University ) , 김경욱 (Seoul National University)
    바이오시스템공학 = Journal of biosystems engineering v.31 no.4 = no.117 ,pp. 315 - 322 , 2006 , 1738-1266 ,

    초록

    A torsional damper comprised of two stage pre-dampers was used to reduce the rattle noise generated in the PTO gear box of a direct engine-PTO driveline of agricultural tractors. It was designed and mounted to the engine flywheel to reduce the torque fluctuation-induced speed variations at the driving gears in the PTO gearbox, which were found to be main cause of the rattle noise. The effects of a hysteresis torque and a torsional stiffness of the damper on the speed variation were analyzed using an 11 degree of freedom non-linear model of the damped PTO driveline. The torsional damper was represented by a single degree of freedom model with 7 parameters. Under a constant hysteresis torque, velocity variation was reduced with decrease in the torsional stiffness of the damper. The velocity variation was also decreased with decrease in the hysteresis torque under a constant torsional stiffness. Optimum values of the torsional stiffness and hysteresis torque were obtained by the model simulation for the PTO driveline under the study. When the optimum values of the damper were used, the sound pressure level of the rattle noise was reduced by 81%, resulting in a reduction of 15dB(A). The optimum damper also reduced the engine speed variation, resulting in a reduction of 80% at the driving gears in the PTO gearbox. The torsional damper showed a good performance in reducing the rattle noise caused by the speed variation in the direct engine-PTO driveline.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  3. [국내논문]   엔진 직결식 PTO 전동 라인의 주요 설계 변수가 PTO 변속부의 치타음에 미치는 영향   피인용횟수: 1

    박영준 (Department of Biosystems and Biomaterial Science and Engineering, Seoul National University ) , 김경욱 (Seoul National University)
    바이오시스템공학 = Journal of biosystems engineering v.31 no.4 = no.117 ,pp. 323 - 333 , 2006 , 1738-1266 ,

    초록

    Introduction of a direct engine-PTO driveline to agricultural tractors has reduced production cost and increased transmission efficiency of the PTO driveline. However, this type of PTO driveline has caused a severe rattle noise in the PTO gearbox under idle conditions. This study was conducted to investigate the causes of the rattle noise and the effects of driveline parameters on it. A mathematical model was developed for a direct engine-PTO driveline. The model was proved experimentally to be accurate enough to simulate the dynamic characteristics of the PTO driveline motions. The simulation study showed that the rattle noise was caused by collisions between the driving and driven gears in the PTO gearbox due to velocity variation of the gears, which was induced by torque fluctuations from the engine. It was also found that the rattle noise decreased with the drag torque and mass moment of inertia of the engine flywheel. Smaller mass moment of inertia of the driven gears and backlash also reduced the rattle noise. However, increasing the drag torque and mass moment of the engine flywheel or decreasing the backlash and mass moment of inertia of the driven gears were limited practically by their detrimental effects on transmission efficiency, gear strength and smooth meshing of the gears.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  4. [국내논문]   트랙터용 유압붐 부착형 모워 개발에 관한 연구   피인용횟수: 3

    장익주 (Bio-Industrial Machinery Engineering, Kyungpook National University ) , 김태수 (Graduate Student, Kyungpook National University ) , 손재룡 (National Institute of Agricultural Engineering ) , 배찬용 (Hangil A&G Co., Ltd.)
    바이오시스템공학 = Journal of biosystems engineering v.31 no.4 = no.117 ,pp. 334 - 341 , 2006 , 1738-1266 ,

    초록

    This study designed to develop a mower which can reach to side of a tractor or inclined road side and operate weeding. The prototype consists of 4 parts; the base and turning equipment, the boom, the arm, the weeder. The hydraulic actuators were divided into two operations, weeding and operation of boom and they were controlled by electrical equipment. Weeding was very effective when pressure set up at $15{\ell}/min$ using weeding, as $2.27kg{\cdot}m$ , 2,210rpm. Weeding range of flail mower was 1.1 to 2.6m from the center of turning equipment at a flat. In case of disk mower, it was 1.5 to 2m. As a result of operation test, flail mower was appropriate for weeding at fence and short weeds, disk mower was appropriate for long weeds.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  5. [국내논문]   소형 무인헬기를 이용한 항공방제기술 (IV) -로터양력의 CFD시뮬레이션 -   피인용횟수: 2

    석태수 (Dept. of Bio-industrial Machinery Engineering, Kyungpook National University ) , 구영모 (Dept. of Bio-industrial Machinery Engineering, Kyungpook National University ) , 손창현 (Dept. of Mechincal Engineering, Kyungpook National University)
    바이오시스템공학 = Journal of biosystems engineering v.31 no.4 = no.117 ,pp. 342 - 348 , 2006 , 1738-1266 ,

    초록

    Aerial application using an unmanned agricultural helicopter became necessary for both labor saving and timely spraying. In the previous paper, a rotor system was developed and lift capability was evaluated. The experimental results were compared with simulated predictions using the CFD-ACE program. From the simulation, the relative velocity on the top surface of the blade airfoil increased, resulting in the pressure drop. The CFD analyses were revealed that a drag resistance on the leading edge of the airfoil, a wake at the trailing edge, and a positive pressure underneath the bottom surface were observed. As the results of the simulation, total lifts of 56.8, 74.4 and $95.0kg_f$ were obtained at the 6, 8 and $10^{\circ}$ of AAT (angle of attack), respectively. The simulation results agreed reasonably up to $10^{\circ}$ of AAT. However, at a greater AAT $( the simulated total lift continuously increased to $105kg_f$ , comparing with a decreasing experimental total lift due to the lack of engine power. At a stiff angle of $18^{\circ}$ AAT, a wake was observed at the trailing edge of the airfoil. A rated operating condition determined from the previous paper was also verified through the simulation.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  6. [국내논문]   순환식 병류형 곡물건조기 개발 (I) -시작기의 성능시험 -   피인용횟수: 3

    한재웅 (Dept. of Bio-Mechatronic Engineering SungKyunKwan University ) , 금동혁 (Dept. of Bio-Mechatronic Engineering SungKyunKwan University ) , 한종규 (Hansung Industrial Co. Ltd., ) , 김훈 (Korea Food Research Institute ) , 홍상진 (Dept. of Bio-Mechatronic Engineering SungKyunKwan University)
    바이오시스템공학 = Journal of biosystems engineering v.31 no.4 = no.117 ,pp. 349 - 354 , 2006 , 1738-1266 ,

    초록

    This study was performed to evaluate the performances for a concurrent flow rice dryer of pilot scale with devices for circulating rice. The pilot scale dryer with the capacity of 700 kg was developed to obtain design informations for the development of actual scale dryer of holding capacity of 10 tons. Three drying tests were conducted at two temperature levels of $100^{\circ}C\;and\;120^{\circ}C$ , and two air flow rates levels of $28.5cmm/m^2\;and\;57.1cmm/m^2$ . Drying conditions for Test-1, Test-2 and Test-3 were $100^{\circ}C\;-28.5cmm/m^2,\;120^{\circ}C-28.5cmm/m^2\;and\;120^{\circ}-57.1cmm/m^2}$ respectively. Drying rates were 0.73%(w.b./h) for Test-1, 0.90%(w.b./h) for Test-2 and 1.46%(w.b./h) for Test-3. The crack ratios of brown rice after drying ranged from 2.4% to 8.4%, and increased with the increase of drying rate and airflow rate. The energy consumptions were from 6,225 kJ/kg to 6,993 kJ/kg which was higher than that of conventional cross-flow rice circulating type dryer used in Korea. This results were due to the lower ambient air temperatures of $4.5^{\circ}C\;to\;13.4^{\circ}C$ during drying tests.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  7. [국내논문]   시뮬레이션에 의한 저장 벼의 곡온 예측  

    금동혁 (Dept. of Bio-Mechatronic Engineering, SungKyunKwan University ) , 김재열 (Dept. of Mechanical Engineering, Sangju National University ) , 김훈 (Korea Food Research Institute)
    바이오시스템공학 = Journal of biosystems engineering v.31 no.4 = no.117 ,pp. 355 - 362 , 2006 , 1738-1266 ,

    초록

    A one-dimensional heat conduction problem in cylindrical coordinate system was solved using Crank-Nicolson finite difference method to predicting the temperature distribution in rice storage bin with wall insulator. The model can simulate the grain temperatures in insulated round bins using the input data of initial grain temperature. ambient air temperature, wind velocity, solar radiation on a horizontal surface, and thermal properties of grain, bin wall, wall insulator, insulator cover, and air. Temperatures were collected at the bin center, 0.65m in radial direction from the center, and near the bin wall in 2.7m diameter bin filled with rough rice to depth of 3.0m were used to validate the simulation model. Grain temperatures predicted by the model were in very good agreement with the measured temperatures. The residual mean square error between measured and predicted grain temperatures at the bin center was $1.38^{\circ}C$ .

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  8. [국내논문]   침수 및 대기 발아방식과 키토산 처리가 현미발아에 미치는 영향   피인용횟수: 2

    이준 (Graduate Student, Chonnam National University ) , 임기택 (Graduate Student, Seoul National University ) , 홍지향 (Research Institute for Agriculture and Life Science, Seoul National University ) , 이종욱 (Chonnam National University ) , 최영수 (Chonnam National University ) , 이양봉 (Pukyong National University ) , 최성문 (Graduate Student, Chonnam National University ) , 정중훈 (Dept. of Biosystems & Biomaterials Science and Engineering, Seoul National University)
    바이오시스템공학 = Journal of biosystems engineering v.31 no.4 = no.117 ,pp. 363 - 368 , 2006 , 1738-1266 ,

    초록

    The effects of germinating types and treatments of acetic acid, water-soluble and water-insoluble chitosan on the germination ratio and sprout length of brown rice were investigated in this study. The treatment of 0.001% acetic acid improved the germination ratio and sprout growth of brown rice in the germinating types of a air-exposure method after water-soaking (Type II) and a repetitive method of water-soaking & air-exposure (Type III), not water-soaking method (Type I). The treatment of water-soluble chitosan with higher concentration caused higher germination ratio and faster sprout growth. The treatment of water-insoluble chitosan repressed the germination and the sprout growth of brown rice. The germination ratios of brown rice germinated by the Type III were higher than those by Type I and Type II for all the treatments of acetic acid and water-soluble & water-insoluble chitosan as more than 97% germination ratio. Also, the Type III method accelerated the sprout growth of brown rice compared with Type I and Type II.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  9. [국내논문]   감자와 고구마의 충격 및 압축 특성에 관한 연구  

    홍지향 (Research Institute for Agriculture and Life Sciences, Seoul National University ) , 김창수 (Sangju National University ) , 김재열 (Sangju National University ) , 김진현 (Sangju National University ) , 최중섭 (Sangju National University ) , 정종훈 (Seoul National University ) , 박장우 (Hankyung National University)
    바이오시스템공학 = Journal of biosystems engineering v.31 no.4 = no.117 ,pp. 369 - 375 , 2006 , 1738-1266 ,

    초록

    Mechanical properties of potato and sweet potato were measured under impact and compression loading. The test apparatus consisted of disgital storage oscilloscope and simple mechanisms which can apply compression and impact forces to potatoes and sweet potatoes. The mechanical properties could be measured while the tissues were ruptured in a very short period time less than 10 ms by impact loading. Rupture force, energy, and deformation were measured as mechanical properties of potatoes and sweet potatoes under impact and compression loading. Rupture forces under impact and compression loading were in the range of 84.1 to 93.7N and 128.9 to 132.2N for external tissues and 60.1 to 64.8N and 158.9 to 171.1N for internal tissues of potato and sweet potato, respectively. Compression speeds and drop heights for each test were in the range of 1.25 to 62.5mm/min and 8 to 24cm.

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  10. [국내논문]   유동층을 이용한 열처리부품의 세정 시스템 설계 및 개발 (I) -유동층 이용 세정 실험장치 설계, 개발 및 실험 -  

    김찬수 (TMT challenger co., LTD ) , 김기대 (Bioindustrial Machinery Engineering Major, Chungnam National Univ.)
    바이오시스템공학 = Journal of biosystems engineering v.31 no.4 = no.117 ,pp. 376 - 384 , 2006 , 1738-1266 ,

    초록

    This study was conducted to perform for comparative analysis of the cleaning efficiency on 3 kinds of cleaning liquid state, 3 steps of cleaning temperature $(45^{\circ}C,\;60^{\circ}C,\;70^{\circ}C,\;)$ and 6 steps of cleaning time (2.5, 5, 7.5, 10, 12.5, 15 minute). 3 kinds of cleaning liquid state are the non fluidized bed, liquid fluidized bed and liquid/solid fluidized bed. UV spectrophotometer was used in estimation of cleaning efficiency, which it is experimental equipment using the absorptiometric analysis method. Cleaning efficiency by cleaning time was increase from 2.5 minutes to 15 minutes, liquid/siolid fluidized bed was indicated the highest cleaning efficiency among the 3 kinds of cleaning liquid state and $70^{\circ}C$ of cleaning temperature at liquid/solid fluidized bed was indicated the highest cleaning efficiency as 98% among the 3 steps of cleaning temperature.

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