Analysis of Pick-up Mechanism for Automatic Transplanter( I )

Kang, Tae Gyoung; Kim, Sung Woo; Kim, Young Keun; Lee, Sangeun; Jun, Hyeon Jong; Choi, Il Soo; Yang, Eun Young; Jang, Kil Soo; Kim, Hyeong Gon

doi:10.14397/jals.2017.51.1.187

Cited by 10 publications

(7 citation statements)

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“…For this purpose, the control program could be modified so that the transplanting manipulator approached the seedlings using a vertical prestart of shifting movement between the plants [35,36]. Considering seedlings to be living and flexible, the synergistic innovation from horticultural and engineering perspectives should be further strengthened in terms of success in transplanting seedlings [7,16,32,34].…”

Section: Discussionmentioning

confidence: 99%

“…The labour shortage has also made greenhouse producers seek help from mechanized efficient production of raw materials for these ready-to-eat products [12]. Much research on automated transplanting systems has been made worldwide, which wants to develop effective processing methods for seedling transplanting with less damage [13][14][15][16]. Relying on the advanced industrial robot technology, the developed countries in Europe and America began research on developing fully automatic transplanters for greenhouse plants several years ago.…”

Section: Introductionmentioning

confidence: 99%

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Development of Simplified Seedling Transplanting Device for Supporting Efficient Production of Vegetable Raw Materials

Han,

Xiang,

et al. 2023

Applied Sciences

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Efficient greenhouse production has a great supporting role in the development of vegetable agricultural and sideline product processing. In this paper, a simplified automatic transplanting device was designed and evaluated in a laboratory. The device mainly consists of a seedling pick-up gripper, a transplanting manipulator, two conveyors and a control system. The flexible multi-pin gripper was designed to effectively grasp, hold, and release seedlings. Through a combination innovation of the linear modules, the transplanting manipulator was designed to move the seedling gripper to the desired working position. The conveyors were the pallet-type double-row chain transmission system for automatic feeding of plug trays and growth pots. The control system was developed to coordinate each of the aforementioned function units. The multi-factor orthogonal and transplanting performance experiments were carried out under the standard seedling agronomy. The results showed that the transplanting frequency and the pick-up depth significantly affected the transplanting quality. When the transplanting frequency was 15 plants/min, the tightened spring force was 1.2 N, and the pick-up penetration depth was 35 mm, the optimum effects of automatic transplanting seedlings could be achieved. The maximum success in transplanting seedlings was 95.47% for local vegetable crops. The developed prototype could realize less waste of seedling resources at the farm level.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of Simplified Seedling Transplanting Device for Supporting Efficient Production of Vegetable Raw Materials

Han,

Xiang,

et al. 2023

Applied Sciences

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“…θ 3 is determined by θ 2 , and δ is a constant; the position of joint J with respect to joint B can be calculated with a given θ 2 . The position of joint B and the position of joint J with respect to joint B are determined by Equations ( 4) and (5), respectively, by which the position of joint J is determined, as shown in Equation (6).…”

Section: Kinematic Analysis To Determine Theoretical Planting Trajectorymentioning

confidence: 99%

“…In the United States and Europe, large transplanters of a tractor-attached or self-propelled fully automatic type are used because the cultivation area per farmer is relatively large. On the other hand, in countries where the cultivation area is relatively small, such as South Korea and Japan, small transplanters of cultivator-attached or walking semi-automatic type are mainly used [5]. The transplanting device is a key element of the transplanter to plant seedlings into the ground.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Main Link Lengths of Transplanting Device of Semi-Automatic Vegetable Transplanter

et al. 2020

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In this study, the lengths of the main links of the transplanting device of a semi-automatic vegetable transplanter were optimized to reduce the weight at the same planting trajectory. The theoretical planting trajectory was obtained from the kinematic analysis for the link structure of the transplanting device and verified through kinematic simulation using commercial software and actual measurement using high-speed camera. Then, the lengths of the main links that have a great influence on the planting trajectory were optimized to have a minimum total length at the same planting trajectory. A genetic algorithm was used as an optimization tool. As a result, with the optimal lengths of the main links, the same planting trajectory was maintained while reducing the total length by 18.32% compared to the conventional one. The transplanting device with the optimal main link lengths would have benefits in terms of agricultural economy by reducing manufacturing and fuel costs.

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“…[10,11] in the United States developed an ejection-type seedling pick-up mechanism which used a pneumatic ejector to push out plug seedlings and coordinated with belt conveyor and spatial link mechanism to realize tomato and pepper plug seedling transplanting with high transplanting efficiency and success ratio. Kang et al [12] from South Korea developed a two-row vegetable transplanter with a fork-type seedling picking device, and the plant shortage rate of the transplanter was 13.7%. Thomas [13] from India developed a four-row rice transplanter with a planar four-bar mechanism, and verified it by experiment.…”

Section: Introductionmentioning

confidence: 99%

Design and experimental study of a planetary gearing mechanism based on twice unequal amplitude transmission ratio

Liu¹,

Yu²,

Tong³

et al. 2022

International Journal of Agricultural and Biological Engineering

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To obtain the optimal seedling taking trajectory, this study proposed the adjustment of the total transmission ratio curve by using human-computer interaction. On the basis of this design method, a planetary non-circular gear mechanism was designed that can realize the twice unequal amplitude transmission ratio to meet the seedling harvesting requirements. The cubic non-uniform B-spline curve was used to fit the twice unequal amplitude transmission ratio curve, and the transmission ratio was freely distributed in two levels. The seedling pick-up mechanism was designed by controlling the seedling taking track and the corresponding attitude directly through the local section of the total transmission ratio, and the gear pitch curve was directly controlled by the transmission ratio. The kinematics model of the seedling pick-up mechanism was also established. Furthermore, the influence of the total transmission ratio on the seedling picking track, the ratio of the wave crest to the amplitude, and the mechanism parameters were discussed. A human-computer interactive optimization software was developed using Matlab, and a set of optimal parameters for the seedling pick-up mechanism was obtained to meet the transplanting requirements. By using the Adams software, the virtual prototype simulation of the seedling pick-up mechanism was completed, and the idle experiment for the track and attitude of the prototype was conducted through high-speed camera technology. The theoretical, simulated, and experimental trajectories were consistent with each other. Results revealed that the success rate of the seedling picking exceeded 90% when the rotation speeds were 40 r/min, 50 r/min, and 60 r/min, and the qualified rate of the matrix decreased with the increase in rotating speed. Moreover, the number of damaged plants increased with the increase in rotating speed. The experimental results showed that the seedling pick-up mechanism designed using the proposed method demonstrated a good effect and met the required seedling picking performance.

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Analysis of Pick-up Mechanism for Automatic Transplanter( I )

Cited by 10 publications

References 0 publications

Development of Simplified Seedling Transplanting Device for Supporting Efficient Production of Vegetable Raw Materials

Development of Simplified Seedling Transplanting Device for Supporting Efficient Production of Vegetable Raw Materials

Optimization of Main Link Lengths of Transplanting Device of Semi-Automatic Vegetable Transplanter

Design and experimental study of a planetary gearing mechanism based on twice unequal amplitude transmission ratio

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