Development of a doorframe-typed swinging seedling pick-up device for automatic field transplantation

Han, Li; Mao, Hanping; Hu, Jianping; Tian, Kunpeng

doi:10.5424/sjar/2015132-6992

Cited by 26 publications

(29 citation statements)

References 10 publications

(29 reference statements)

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“…Rosli et al [18] developed seeding tray placement and transfer devices for rice seeding systems to increase seeding efficiency, but the loading and unloading trays are still manually completed. Han et al [19] developed a door-frame pendulum device for automatic field transplanter. This equipment can simultaneously extract two seedlings from the tray and transfer them to the transplant discharge point.…”

Section: State Of the Artmentioning

confidence: 99%

“…Note: λ represents the angle between the grab position and the maximum limit position, (°); k represents the distance between the grabbing point and the maximum limit point. Equation 20is obtained by taking Equation (19) into Equation (17). (Note: replace θ with λ in Equation 17).…”

Section: Determination Of the Maximum Limit Positionmentioning

confidence: 99%

“…(2) Simulation when the gripper is at the maximum limit position: the obtained parameters are inputted into Equation (19) Fig. 10(a) to 10(f).…”

Section: Simulation Analysismentioning

confidence: 99%

See 2 more Smart Citations

Design and Optimized Simulation of Seedling Tray Stacking Manipulator for Seedling Machine Producing Square Substrate Blocks

Li¹,

Liu²,

Li³

et al. 2019

JESTR

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Industrialized seedling has the advantages of high efficiency, low cost, easy promotion of fine varieties, and standardized seedling management, so it is the trend of modern agriculture development. Seedlings using square substrate blocks is one of the main ways, but the high labor intensity and high labor costs have hindered its rapid development. In order to realize the automatic unloading of the seedling trays, this study designed and optimized a kind of seedling tray stacking manipulator for nursery machine that produces square substrate blocks. A design method for the robustness of grabbing the seedling trays and the anti-interference between manipulator and seedling tray was also proposed. Firstly, the principle of stacking manipulator was analyzed, and the structure was optimized. Kinematics analysis was conducted, and a kinematic model was established. The relationship between the stroke of an electric push rod and the opening and closing angle of a claw was obtained through model analysis. The movement stroke of the electric push rod was optimized to meet the design requirements of the maximum and minimum limit positions of the manipulator. Finally, the rationality of the parameter design was verified by static and kinematics simulation. The results demonstrate that the stroke range of the electric push rod is 27.6-105.6 mm, and the opening and closing angle range of the claw is 11.7-66.7°, which meets the requirements. In addition, the force of each component during the seedling moving is within a reasonable range. This study provides an important reference for the development and performance improvement of automatic square substrate seedling machines that support automatic loading, unloading, and palletizing.

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Section: State Of the Artmentioning

confidence: 99%

Section: Determination Of the Maximum Limit Positionmentioning

confidence: 99%

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Design and Optimized Simulation of Seedling Tray Stacking Manipulator for Seedling Machine Producing Square Substrate Blocks

Li¹,

Liu²,

Li³

et al. 2019

JESTR

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“…Manual transplanting on a large commercial scale is labor-intensive, expensive, and often does not result in uniform distribution of plants compared with a mechanical transplanter [24] . A well-performing seedling transplanter has not been applied widely, primarily because of problems with higher levels of site preparation, flexible standard trays, cost, and operating results [25] . To overcome these factors, a fully automatic transplanter will be improved to plant various vegetable seedlings.…”

Section: Introduction mentioning

confidence: 99%

Theoretical analysis and development of a mechanism with punching device for transplanting potted vegetable seedlings

Zhou¹,

Shan²,

Xue³

et al. 2020

International Journal of Agricultural and Biological Engineering

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Several studies have indicated that potted vegetable seedling transplanting technology can greatly improve the ability of vegetable seedlings to resist cold, flood, drought, saline-alkali and pests. The existing transplanting equipment mostly adopts mechanical, electrical and hydraulic integration technologies with a complex structure and a high cost. To address the problems of the complex structure and low efficiency of existing transplanting equipment, a rotary transplanting mechanism for potted vegetable seedlings was developed through configuration analysis and optimization design. Through kinematic analysis of the transplanting mechanism, optimization design software was developed, and the parameters were optimized. A mechanism was developed for picking, transporting, hole punching and transplanting potted vegetable seedlings. The virtual simulation results showed that the maximum error of attitudes of the transplanting arm is less than 1.19° and that of the hole punching shovel is less than 1.7°. In this study, perforation, seedling harvesting and transplanting experiments were conducted through a bench test. The results showed that the specific trajectory and attitude of the potted vegetable seedlings transplanting mechanism conformed to the requirements of potted vegetable seedling transplantation and the success rate of seedling picking was 92.4%, which verified the correctness and feasibility of the rotary potted vegetable seedling transplanting mechanism.

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“…Many countries have shown a keen interest in the development of a variety of mechanical transplanters, 2,3 ranging from semi-automatic 4 to automatic. [5][6][7][8][9][10] At present, mechanical transplants are quite qualified for seeding tomatoes, strawberries, nursery stock, and so on.…”

Section: Introductionmentioning

confidence: 99%

Determining the minimal mulch film damage caused by the up-film transplanter

Wang

2018

Advances in Mechanical Engineering

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To satisfy the increasing demand for improving productivity while reducing pollution, this article proposes a method to determine the minimal mulch film damage in mechanical transplantation operations, which can be used to guide the design of all the up-film transplanters. Specifically, the whole working process of digging the hole for a typical dibble-type transplanter working in Xinjiang province of China is analyzed, in which the dibble motion serves to illustrate the effectiveness of the proposed method. Both the ideal condition and the realistic environmental force-involved condition are taken into consideration during analytically modeling the process of the mulch film damage. Based on the presented two-layer soil-layered model and basic motion principles, a series of equations is derived to describe the typical dibbletype transplanter motion involved gravity and soil counter-force. Furthermore, the derived relations between working parameters and structural parameters of the transplanter guide the search of a minimum value of the mulch film damage. Finally, simulation results verify the effectiveness of the presented theoretical calculation. More remarkably, the dibble motion in the preliminary field trial is similar to that in the simulations. The obtained results provide a new way to deal with the optimal design and operations of novel up-film transplanters.

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Development of a doorframe-typed swinging seedling pick-up device for automatic field transplantation

Cited by 26 publications

References 10 publications

Design and Optimized Simulation of Seedling Tray Stacking Manipulator for Seedling Machine Producing Square Substrate Blocks

Design and Optimized Simulation of Seedling Tray Stacking Manipulator for Seedling Machine Producing Square Substrate Blocks

Theoretical analysis and development of a mechanism with punching device for transplanting potted vegetable seedlings

Determining the minimal mulch film damage caused by the up-film transplanter

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