Optimized design and experiment of a fully automated potted cotton seedling transplanting mechanism

Xue, Xianglei; Li, Lianhao; Xu, Chunming; Li, Enquan; Wang, Yujie

doi:10.25165/j.ijabe.20201304.5317

Cited by 14 publications

(11 citation statements)

References 5 publications

(5 reference statements)

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“…The planetary gear train is composed of left and right housings, planetary gears (1 and 5), a sun gear (3), intermediate gears ( 2 and 4) and so on. The planting arm part is composed of a cam (13), a seedling-taking shifting-yoke (14), a seedling-pushing shifting-yoke (16), a planting arm shell (19), a seedling needle (20), a pushing and pulling seat plate (23), a connecting rod (24), a pushing bowl (21), a pushing bowl slider (22), and a taking bowl slide (26) consisting of a spring seat, which cooperates with the spring seat on the planting arm shell. The planting arm shell is provided with a slideway, and the pushing bowl slider (22) and taking bowl slider (26) can slide on it, as shown in Figure 2(c).…”

Section: Working Principlementioning

confidence: 99%

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Exploring the Optimal Design for and Experimentation on a Bowl-Based Mechanism for Transplanting Potted Strawberry Seedlings

Yin

Yang

Zhou

et al. 2021

Preprint

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To improve the mechanization of strawberry planting integration and the efficiency of fetching and transplanting seedlings, an integrated transplanting mechanism with protruding, fetching and planting is designed. This new device can realize rapid fetching and pushing bowl movements. The working principle of the slewing mechanism is analyzed, a kinematics model of the mechanism is established, and the optimization goal is established. Visual auxiliary analysis software is developed, optimized parameters are established, and the corresponding theoretical trajectory is provided. A three-dimensional model is established and a virtual simulation design analysis is performed to obtain a simulation trajectory. Three-dimensional printing technology is used to manufacture the test prototype, and the actual working trajectory of the test prototype is extracted using high-speed photography technology, which verifies the consistency of the actual trajectory with the theoretical and simulated trajectories. A prototype transplanting experiment is performed, showing that the success rate of seedling extraction is 91.2% and the rate of excellent planting is 82.8%, which meet the requirements for integrated strawberry harvesting, planting and transplanting and verify the correctness and feasibility of the mechanism design.

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Section: Working Principlementioning

confidence: 99%

“…The movement diagram of the noncircular planetary gear train is shown in Figure 3, and the symbols of the transplanting mechanism are described in Table 1 [20][21][22] .…”

Section: Kinematic Model Establishmentmentioning

confidence: 99%

Exploring the Optimal Design for and Experimentation on a Bowl-Based Mechanism for Transplanting Potted Strawberry Seedlings

Yin

Yang

Zhou

et al. 2021

Preprint

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“…The clamping-type planetary gear train transplanting mechanism (PGTM) can complete the operations of clamping, extracting, transporting, and pushing seedlings by using a single mechanism. It has a compact structure, continuous and stable work, and low cost and has become an important direction for the research of various transplanting machines [5,6] .…”

Section: Introduction mentioning

confidence: 99%

Design of clamping-pot-type planetary gear train transplanting mechanism for rice wide–narrow-row planting

Wang

Sun

Huang

et al. 2021

International Journal of Agricultural and Biological Engineering

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To design a clamping-pot-type wide-narrow-row pot seedling transplanting (WPST) mechanism with desired spatial beak-shaped trajectory and working posture, a new design method of planetary gear train transplanting mechanism (PGTM) with non-circular gears based on several key spatial poses (position and posture) was proposed. The PGTM was simplified to a spatial open-loop chain with two-revolute (2R) joints. The geometric constraint equations containing only the structural parameters of the chain were then established on the basis of the three key spatial poses, and the homotopy algorithm was used to obtain all the required parameters of the mechanism. In accordance with the parameters obtained, the relative angular displacement relation between the planet carrier and the transplanting arm was optimized, the trajectory of the mechanism was replayed, and the total transmission ratio was determined. The degree of freedom of the spatial 2R mechanism was reduced by attaching to the unequal gear pair, and the transmission ratio was distributed in accordance with the gear type to realize the design of a non-circular gear pitch curve. Lastly, a clamping-pot-type PGTM for rice WPST driven by the combination of planar non-circular and non-conical gears was designed, and virtual simulation and prototype test were conducted. Results showed that the simulation and prototype test trajectories were consistent with the desired trajectory. Under the operating speeds of 50 r/min and 90 r/min, the success rates of seedling picking were 95.32% and 90.15%, respectively, which verified the feasibility of the theoretical method. This method could provide a reference for the design of a spatial PGTM with nonuniform transmission.

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“…Researchers have also focused on increasing the working speed of the dibbling mechanism, considering agronomic requirements for transplanting (i.e., straight upright orientation, certain planting depth, and less mechanical damage). Based on the literature, the acceptable range of straight upright orientation of the transplanted seedlings is 90 ± 20 • [18,19]. Other agronomic requirements, such as planting depth, planting interval, and soil moisture content, also need to be maintained as 40-50 mm, 30-50 mm, and 15-25%, respectively, to operate the transplanter at 150-350 mm/s forward speeds [19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…Based on the literature, the acceptable range of straight upright orientation of the transplanted seedlings is 90 ± 20 • [18,19]. Other agronomic requirements, such as planting depth, planting interval, and soil moisture content, also need to be maintained as 40-50 mm, 30-50 mm, and 15-25%, respectively, to operate the transplanter at 150-350 mm/s forward speeds [19][20][21][22][23][24]. Following on from these researchers, this study analyzes the gear-driven hopper-type dibbling mechanism of an automatic pepper transplanter with an improved design for efficiently planting seedlings at high speeds.…”

Section: Introductionmentioning

confidence: 99%

Working Speed Analysis of the Gear-Driven Dibbling Mechanism of a 2.6 kW Walking-Type Automatic Pepper Transplanter

et al. 2021

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The development of an automatic walking-type pepper transplanter could be effective in improving the mechanization rate in pepper cultivation, where the dibbling mechanism plays a vital role and determines planting performance and efficiency. The objective of this research was to determine a suitable working speed for a gear-driven dibbling mechanism appropriate for a pepper transplanter, while considering agronomic transplanting requirements. The proposed dibbling mechanism consisted of two dibbling hoppers that simultaneously collected free-falling seedlings from the supply mechanism and dibbled them into soil. To enable the smooth collection and plantation of pepper seedlings, analysis was carried out via a mathematical working trajectory model of the dibbling mechanism, virtual prototype simulation, and validation tests, using a physical prototype. In the mathematical model analysis and simulation, a 300 mm/s forward speed of the transplanter and a 60 rpm rotational speed of the dibbling mechanism were preferable in terms of seedling uprightness and low mulch film damage. During the field test, transplanting was conducted at a 40 mm planting depth, using different forward speed levels. Seedlings were freely supplied to the hopper from a distance of 80 mm, and the success rate for deposition was 96.79%. A forward speed of 300 mm/s with transplanting speed of 120 seedlings/min was preferable in terms of achieving a high degree of seedling uprightness (90 ± 3.26), a low rate of misplanting (8.19%), a low damage area on mulch film (2341.95 ± 2.89 mm2), high uniformity of planting depth (39.74 ± 0.48 mm), and low power consumption (40.91 ± 0.97 W).

show abstract

Optimized design and experiment of a fully automated potted cotton seedling transplanting mechanism

Cited by 14 publications

References 5 publications

Exploring the Optimal Design for and Experimentation on a Bowl-Based Mechanism for Transplanting Potted Strawberry Seedlings

Exploring the Optimal Design for and Experimentation on a Bowl-Based Mechanism for Transplanting Potted Strawberry Seedlings

Design of clamping-pot-type planetary gear train transplanting mechanism for rice wide–narrow-row planting

Working Speed Analysis of the Gear-Driven Dibbling Mechanism of a 2.6 kW Walking-Type Automatic Pepper Transplanter

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