Optimized design and experiment of the three-arm transplanting mechanism for rice potted seedlings

Yin, Jingxue; Wang, Zeliang; Zhou, Maile; Wu, Luning; Zhang, Yan

doi:10.25165/j.ijabe.20211405.6844

Cited by 9 publications

(10 citation statements)

References 2 publications

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“…When the hanging-cup transplanter is used for planting, the planter should rotate at a constant speed with the planting plate and move in a straight line at a constant speed in the horizontal direction [25,26]. As shown in Figure 2, the planter is mainly divided into four stages.…”

Section: Analysis Of the Movement Process Of The Hanging-cup Transpla...mentioning

confidence: 99%

Experimental Research and Analysis of Soil Disturbance Behavior during the Hole Drilling Process of a Hanging-Cup Transplanter by DEM

Zeng

Bai

et al. 2023

Processes

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This study provides a basis for designing and optimizing the key components of hanging-cup transplanters. The discrete element method, a high-speed photography test, and indoor soil bin tests were used to explore soil disturbance behavior during the hole drilling process. A comparative analysis of the discrete element method and the high-speed photography test indicated that soil particles are mainly affected by the coupled effects of the shear force and the squeezing force of the planter. The soil disturbance range in the horizontal and longitudinal sections gradually increases with the movement of the planter. The change in the soil particle velocity of the horizontal and longitudinal sections in different zones shows a trend of first increasing, then decreasing, and finally stabilizing. The velocity of soil particles in the longitudinal section varies significantly in the direction of burial. The soil in the horizontal section mainly moves to both sides when the duckbill is opened. The closer the soil particles are to the outer wall of the duckbill, the greater the change in velocity is. The soil bin tests and simulations were carried out under different conditions, but the change trend of the simulation results is consistent with the soil bin test results, proving that the simulation model is reliable. With the forward speed of the transplanter, planting depth, and soil compactness as the test factors, and the hole depth and hole longitudinal length as the response values, an orthogonal test of three factors and three levels was designed. A regression model between each element and response value was established. The optimal parameter combination was obtained when the forward speed was 1.25 km/h, the planting depth was 80 mm, and the soil firmness was 140~150 (N/cm2); these results were experimentally verified.

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Section: Analysis Of the Movement Process Of The Hanging-cup Transpla...mentioning

confidence: 99%

Experimental Research and Analysis of Soil Disturbance Behavior during the Hole Drilling Process of a Hanging-Cup Transplanter by DEM

Zeng

Bai

et al. 2023

Processes

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“…Compared with blanket seedling transplanting, rice potted seedling transplanting is conducive to cultivating strong seedlings, without damaging the roots, early tillering, effective tillering at low nodes increased by 20%, and the average yield increased by more than 10%. 7 The rice potted seedling transplanting mechanism mainly has push-out transplanting mechanism, gear linkage transplanting mechanism, linkage transplanting mechanism and non-circular gear train transplanting mechanism. Japan's well off the production of PZP-80 type fully automatic rice potted seedling transplanting machine, which adopts the ''push-out'' transplanting method, relying on four sets of devices were completed to picking, turning, conveying and planting four actions.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and test of walk-type rice potted seedling transplanting machine

Zhou,

Wang,

Zhang

et al. 2024

Advances in Mechanical Engineering

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At present, rice potted seedling transplanting machine is mostly suitable for high-speed, large seedlings and large plant distance rice transplanting. In order to adapt to the transplanting of different types of rice potted seedlings, this study carried out theoretical research and institutional design for transplanting rice potted seedlings suitable for small seedlings and small plant spacing. A 2R open-chain rice potted seedling transplanting mechanism with two non-circular gears meshing to achieve the ideal transplanting posture was developed, and an optimization software for potted seedling transplanting was developed by establishing the kinematic model of the transplanting mechanism, which simulated the motion trajectory and attitude of the transplanting arm during the transplanting process. Through the optimization of the optimization design software parameters, a set of parameters that meet the requirements of transplanting rice potted seedlings in the rear insert rice potted are obtained, a transplanting mechanism suitable for walking rice potted seedling transplanting machine is designed and developed, and the experiments of rice potted seedling picking, conveying and planting are completed. The success rate of the designed walk-type rice potted seedling transplanting mechanism on the bench was 96.7%, and the qualification rate of the whole machine transplanting test was 89.1%.

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“…Zhou et al [18] used fitted Bessel curves to realize the optimal design of non-circular gear pitch curves to improve the meshing transmission performance of second-order non-circular planetary gear trains, but it is difficult to generate flexible transplantation trajectories. Wu et al [19] proposed a forward and reverse design method for planetary gear system rice potting plant transplanting mechanism, which combines forward design and reverse fine-tuning to obtain a relatively ideal trajectory. However, this design method does not have good forward optimization characteristics, and the reverse fine-tuning destroys the pitch curve of the forward design, which reduces the gear meshing transmission performance and affects the stability and success of the transplanting process.…”

Section: Introductionmentioning

confidence: 99%

Inverse design and accurate optimization of layered structured seeding mechanism for sugarcane planters

Liu,

Chen,

et al. 2023

International Journal of Agricultural and Biological Engineering

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Existing sugarcane planters are difficult to have ideal seeding trajectory and motion attitude at the same time, and the speed is difficult to meet the requirements at the critical stage, resulting in poor stability, which ultimately makes it impossible to ensure that the sugarcane seeding is carried out in accordance with the agronomic requirements to ensure that the cane buds are oriented toward the wall of the seeding trench. Aiming at the second-order non-circular planetary gear system pendulum seeding mechanism of the planter, the paper innovatively adopts the combination of inverse design and multi-objective layered accurate optimization to solve the problems of attitude, speed and trajectory that do not meet the requirements of fixed-attitude seeding that still exists in the process of sugarcane seeding. The second-order non-circular planetary gear system is simplified into a three-rod two-degree-of-freedom mechanism, and the radius of the pitch curve of each non-circular gear is solved inversely by actively preplanning the static trajectory of the cane seed motion and analyzing the law of motion of the rod assembly. Determining the range of cane seed attitude angles in different motion phases as the first layer optimization objective, and fine-tuning the position of static trajectory key type value points to achieve the first layer optimization. Based on the non-circular gear pitch curve obtained from optimization, the interpolation points are marked on each non-circular gear pitch curve of the second-order non-circular planetary gear system, and based on the parameter optimization method of humancomputer interaction, the radius values corresponding to the interpolation points of the non-circular gear pitch curve are finetuned to optimize the pitch curves, so as to satisfy the speed requirements of the cane species in each stage, and at the same time to make the convexity of non-circular gears in line with the principle of gear mesh, so as to complete the second layer of accurate optimization. The results of simulation verification show that the motion trajectory attitude of the virtual prototype is basically consistent with the theoretical model, which verifies the feasibility of the mechanism design. This study provides a new optimized design method for the cane seeding mechanism of sugarcane planters to achieve directional seeding.

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Optimized design and experiment of the three-arm transplanting mechanism for rice potted seedlings

Cited by 9 publications

References 2 publications

Experimental Research and Analysis of Soil Disturbance Behavior during the Hole Drilling Process of a Hanging-Cup Transplanter by DEM

Experimental Research and Analysis of Soil Disturbance Behavior during the Hole Drilling Process of a Hanging-Cup Transplanter by DEM

Design and test of walk-type rice potted seedling transplanting machine

Inverse design and accurate optimization of layered structured seeding mechanism for sugarcane planters

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