인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
DBpia AI
AI 에이전트
AI 아이디어
AI 리더
AI 뷰어
Citeasy
크롬 서지관리 다운로드
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
피인용 0
초록·키워드
Background: This study investigated the transplanting mechanism and evaluated the field performance of a double-crank five-bar transplanter engineered for plug-grown Angelica gigas seedlings.
Methods and Results: A three-dimensional model and closed-loop kinematic formulation were used to determine the displacement, velocity, acceleration, and trajectory of the planting end-effector. Simulation results indicated that the end-effector followed a smooth, repeatable elliptical path, with horizontal and vertical ranges of approximately 40 ㎝ and 30 ㎝, respectively, facilitating sequential seedling reception, transfer, soil insertion, release, and withdrawal. The velocity analysis focused on achieving a zero-speed transplanting condition, whereby the backward horizontal velocity of the planting mechanism offset the forward speed of the transplanter during insertion. Field tests were conducted using 60-day-old seedlings cultivated in 72-cell plug trays under controlled nursery conditions. The transplanter achieved an average transplanting rate of 88 seedlings per minute, yielding seedling damage and missed-planting rates of 3% and 4%, respectively. Although the mechanism demonstrated high operational capacity and satisfactory seedling-handling performance, increased vibration and occasional deviations in seedling posture occurred during high-speed operations. These issues were attributed to rapid changes in motion, linkage clearance, transmission backlash, and release-timing errors.
Conclusions: Further optimization of link dimensions, crank phase relationships, feeder synchronization, vibration isolation, and duckbill opening control is recommended to enhance planting accuracy, seedling uprightness, and operational reliability under field conditions.
Methods and Results: A three-dimensional model and closed-loop kinematic formulation were used to determine the displacement, velocity, acceleration, and trajectory of the planting end-effector. Simulation results indicated that the end-effector followed a smooth, repeatable elliptical path, with horizontal and vertical ranges of approximately 40 ㎝ and 30 ㎝, respectively, facilitating sequential seedling reception, transfer, soil insertion, release, and withdrawal. The velocity analysis focused on achieving a zero-speed transplanting condition, whereby the backward horizontal velocity of the planting mechanism offset the forward speed of the transplanter during insertion. Field tests were conducted using 60-day-old seedlings cultivated in 72-cell plug trays under controlled nursery conditions. The transplanter achieved an average transplanting rate of 88 seedlings per minute, yielding seedling damage and missed-planting rates of 3% and 4%, respectively. Although the mechanism demonstrated high operational capacity and satisfactory seedling-handling performance, increased vibration and occasional deviations in seedling posture occurred during high-speed operations. These issues were attributed to rapid changes in motion, linkage clearance, transmission backlash, and release-timing errors.
Conclusions: Further optimization of link dimensions, crank phase relationships, feeder synchronization, vibration isolation, and duckbill opening control is recommended to enhance planting accuracy, seedling uprightness, and operational reliability under field conditions.
본문·목차
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