Experimental and Theoretical Performance of a Vacuum Seeder Nozzle for Vegetable Seeds

Guarella, P.; Pellerano, Achille; Pascuzzi, Simone

doi:10.1006/jaer.1996.0043

Cited by 30 publications

(11 citation statements)

References 0 publications

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“…The total cost of sowing is only 15.3% of the estimated cost of manual sowing. Guarella et al [14] studied the performance of a vacuum seeder for vegetable seed. The experimental and theoretical methods were adopted for seeder tests.…”

Section: The Mechanical Rice Hill-direct-seeder Developed By Luomentioning

confidence: 99%

General structure design and field experiment of pneumatic rice direct-seeder

Wang

Luo

et al. 2017

International Journal of Agricultural and Biological Engineering

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In order to meet the requirement of field direct seeding for super hybrid rice: 1-3 seeds per hill, a pneumatic rice direct-seeder with six seeding metering devices was designed. Transmission system of pneumatic rice direct-seeder and seed metering device were analyzed in this study. And the pipeline structure and vortex pump were designed and selected. The pressure distribution of the pipeline was tested. The pressure value of each sub-pipeline under the conditions of different main pipeline pressure value was obtained and the reasons for pressure loss were analyzed. The results showed that the variation coefficient between sub-pipelines was less than 5%. The pipeline pressure could be evenly distributed. Further, the field experiments were carried out on super hybrid rice Peizataifeng using two-factor testing, by which the effects of different negative pressure and different forward speed (namely, rotational speed of suction plate) for seeding precision were studied. It found that: (1) the optimal negative pressure was 2 kPa; (2) under the optimal negative pressure, the probabilities of 1-3 seeds per hill for the direct-seeder were 93.41%, 95.47% and 97.50%, respectively, when the forward speed of the direct-seeded was high, medium and low speed; (3) the probability of empty hole was less than 2%, which satisfied the field direct seeding requirements of super hybrid rice. Additionally, hill spacing was measured, and the factors affecting the hill spacing were analyzed. The results showed that the fluctuation of hill spacing in the small range will not affect the seeding effect. In this study, a new type of pneumatic rice direct-seeder was designed. The main working components were tested and analyzed. The best parameters of field work were obtained. It provides the basis for the field application of the pneumatic rice precision seeder.

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Section: The Mechanical Rice Hill-direct-seeder Developed By Luomentioning

confidence: 99%

General structure design and field experiment of pneumatic rice direct-seeder

Wang

Luo

et al. 2017

International Journal of Agricultural and Biological Engineering

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“…If the pressure was too big, it would cause the increase of the reseeding. Meanwhile in the seeding process, if the speed of planting tray exceeded a certain limit, there was no adequate filling time, likely to cause serious leakage phenomenon [19][20][21]. Due to the fact that the impact of these factors on the qualified rate was not a simple linear relationship, the quadratic orthogonal rotation combination design method was taken in this paper to arrange the experiments.…”

Section: Design Of Seeding Experimentsmentioning

confidence: 99%

Study and Experiment on a Wheat Precision Seeding Robot

Hua

Dong

Liu

et al. 2015

Journal of Robotics

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The wheat precision seeding technology provided an advanced agricultural support for the high yield of wheat. But the lack of effective agricultural machine made this technique difficult to apply widely. In this paper a wheel mobile robot to achieve the wheat precision seeding technology was designed. The kinematic model of the robot was built and simulated. And experimental study was taken under different operating conditions. Because of multiple effort factors, a quadratic orthogonal rotation combination design method was applied in the experiments, identifying the main factors by analysis. Then the field test was carried out according to the main factors. The experiment results showed that the qualified rates of seeding exceed 93% in different sowing speed. That reached the agronomic requirements of wheat precision seeding.

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“…Plug seedling raising machine in other countries has a research history of nearly 50 years; hence, the equipment and technologies are perfect and mature [5][6][7][8][9]. The main instruments used are Blackmore, Speeding, EZ, Vandana in the United States, Hamilton in the United Kingdom, Visser in the Netherlands, Willimeses in Australia, Helper seeders in Korea's Dadong Electromechanical, and Yanmar and Kubota in Japan [10,11].…”

Section: Introductionmentioning

confidence: 99%

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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Experimental and Theoretical Performance of a Vacuum Seeder Nozzle for Vegetable Seeds

Cited by 30 publications

References 0 publications

General structure design and field experiment of pneumatic rice direct-seeder

General structure design and field experiment of pneumatic rice direct-seeder

Study and Experiment on a Wheat Precision Seeding Robot

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

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