Abstract
The double-hole rice vacuum seed meter is critical equipment for the planting precision of rice direct seeding. The effects of shaped holes and seed disturbance on the precision of rice bunch planting were investigated to improve the precision of bunch planting with the double-hole rice vacuum seed meter. A test bench with the rice vacuum seed meter was set up to analyze the trends in the quality of feed index, miss index, and multiple index of seed meters with different shaped holes at different speeds and vacuum pressures. Based on the optimal hole structure, different seed disturbance structures were designed to investigate the influence of the seed disturbance structure on the precision of bunch planting. A multiple linear regression model was established for the relationship between the disturbance structure, vacuum pressure, rotational speed, and the precision of bunch planting. Discrete element numerical simulation experiments were carried out to analyze the effect of disturbance structures on seeds. The planting precision of the seed meter with the shaped hole was significantly higher than that of the seed meter without the shaped hole while the shaped hole B was the optimum structure. Disturbance structure affects the quality of feed index, multiple index rate, and miss index. The planting precision of the seed disturbance structure II was better than the other structures. At a speed of 60 rpm and vacuum pressures of 2.0 kPa, 2.4 kPa, and 2.8 kPa, the qualities of feed index of seed disturbance structure II were 90%, 91.11%, and 89.17%, respectively, and the miss indexes were 2.96%, 1.94%, and 1.57%, respectively. At high rotational speeds, the precision of rice bunch planting with the seed disturbance structure is better than that without the seed disturbance structure. In the simulation test, the seed velocity and total force magnitude of the meter without disturbance structures were less than those with the disturbed structure. Simulation experiments showed that the seed disturbance structure breaks up the stacked state of seeds. Research has shown that the shaped hole holds the seed in a stable suction posture, which helps to increase the seed-filling rate. Seed disturbance improves seed mobility, thereby enhancing the precision of bunch planting.
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Claims 14
Claim · model-written summary
The shaped-hole seed meter had significantly higher planting precision than the meter without a shaped hole.
- Taxon
- Rice
Oryza sativat0 - Treatment
- shaped holee0
- Outcome
- planting precisione0
- Direction
- highere0
- Comparator
- the seed meter without the shaped holee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the Double-Hole Rice Vacuum Seed Meter”
e0“The planting precision of the seed meter with the shaped hole was significantly higher than that of the seed meter without the shaped hole while the shaped hole B was the optimum structure”
Claim · model-written summary
Shaped hole B was the optimum shaped-hole structure for the seed meter.
- Taxon
- RiceOryza sativat0
- Material
- shaped hole Be0
- Outcome
- optimum structuree0
- Comparator
- the seed meter without the shaped holee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the Double-Hole Rice Vacuum Seed Meter”
e0“The planting precision of the seed meter with the shaped hole was significantly higher than that of the seed meter without the shaped hole while the shaped hole B was the optimum structure”
Claim · model-written summary
Seed disturbance structure II gave better planting precision than the other disturbance structures.
- Taxon
- RiceOryza sativat0
- Treatment
- seed disturbance structure IIe1
- Outcome
- planting precisione1
- Direction
- bettere1
- Comparator
- the other structurese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the Double-Hole Rice Vacuum Seed Meter”
e1“The planting precision of the seed disturbance structure II was better than the other structures”
Claim · model-written summary
With seed disturbance structure II at 60 rpm and 2.0 kPa, the feed index quality was 90%.
- Taxon
- RiceOryza sativat0
- Treatment
- seed disturbance structure IIe2
- Outcome
- qualities of feed indexe2
- Value
- 90%e2
- Qualifier
- At a speed of 60 rpm and vacuum pressures of 2.0 kPae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the Double-Hole Rice Vacuum Seed Meter”
e2“At a speed of 60 rpm and vacuum pressures of 2.0 kPa, 2.4 kPa, and 2.8 kPa, the qualities of feed index of seed disturbance structure II were 90%, 91.11%, and 89.17%, respectively, and the miss indexes were 2.96%, 1.94%, and 1.57%, respectively”
Claim · model-written summary
With seed disturbance structure II at 60 rpm and 2.4 kPa, the feed index quality was 91.11%.
- Taxon
- RiceOryza sativat0
- Treatment
- seed disturbance structure IIe2
- Outcome
- qualities of feed indexe2
- Value
- 91.11%e2
- Qualifier
- 2.4 kPae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the Double-Hole Rice Vacuum Seed Meter”
e2“At a speed of 60 rpm and vacuum pressures of 2.0 kPa, 2.4 kPa, and 2.8 kPa, the qualities of feed index of seed disturbance structure II were 90%, 91.11%, and 89.17%, respectively, and the miss indexes were 2.96%, 1.94%, and 1.57%, respectively”
Claim · model-written summary
With seed disturbance structure II at 60 rpm and 2.8 kPa, the feed index quality was 89.17%.
- Taxon
- RiceOryza sativat0
- Treatment
- seed disturbance structure IIe2
- Outcome
- qualities of feed indexe2
- Value
- 89.17%e2
- Qualifier
- 2.8 kPae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the Double-Hole Rice Vacuum Seed Meter”
e2“At a speed of 60 rpm and vacuum pressures of 2.0 kPa, 2.4 kPa, and 2.8 kPa, the qualities of feed index of seed disturbance structure II were 90%, 91.11%, and 89.17%, respectively, and the miss indexes were 2.96%, 1.94%, and 1.57%, respectively”
Claim · model-written summary
With seed disturbance structure II at 60 rpm and 2.0 kPa, the miss index was 2.96%.
- Taxon
- RiceOryza sativat0
- Treatment
- seed disturbance structure IIe2
- Outcome
- miss indexese2
- Value
- 2.96%e2
- Qualifier
- At a speed of 60 rpm and vacuum pressures of 2.0 kPae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the Double-Hole Rice Vacuum Seed Meter”
e2“At a speed of 60 rpm and vacuum pressures of 2.0 kPa, 2.4 kPa, and 2.8 kPa, the qualities of feed index of seed disturbance structure II were 90%, 91.11%, and 89.17%, respectively, and the miss indexes were 2.96%, 1.94%, and 1.57%, respectively”
Claim · model-written summary
With seed disturbance structure II at 60 rpm and 2.4 kPa, the miss index was 1.94%.
- Taxon
- RiceOryza sativat0
- Treatment
- seed disturbance structure IIe2
- Outcome
- miss indexese2
- Value
- 1.94%e2
- Qualifier
- 2.4 kPae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the Double-Hole Rice Vacuum Seed Meter”
e2“At a speed of 60 rpm and vacuum pressures of 2.0 kPa, 2.4 kPa, and 2.8 kPa, the qualities of feed index of seed disturbance structure II were 90%, 91.11%, and 89.17%, respectively, and the miss indexes were 2.96%, 1.94%, and 1.57%, respectively”
Claim · model-written summary
With seed disturbance structure II at 60 rpm and 2.8 kPa, the miss index was 1.57%.
- Taxon
- RiceOryza sativat0
- Treatment
- seed disturbance structure IIe2
- Outcome
- miss indexese2
- Value
- 1.57%e2
- Qualifier
- 2.8 kPae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the Double-Hole Rice Vacuum Seed Meter”
e2“At a speed of 60 rpm and vacuum pressures of 2.0 kPa, 2.4 kPa, and 2.8 kPa, the qualities of feed index of seed disturbance structure II were 90%, 91.11%, and 89.17%, respectively, and the miss indexes were 2.96%, 1.94%, and 1.57%, respectively”
Claim · model-written summary
At high rotational speeds, seed disturbance gave better rice bunch planting precision than no disturbance structure.
- Taxon
- RiceOryza sativat0
- Treatment
- seed disturbance structuree3
- Outcome
- precision of rice bunch plantinge3
- Direction
- bettere3
- Qualifier
- At high rotational speedse3
- Comparator
- without the seed disturbance structuree3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the Double-Hole Rice Vacuum Seed Meter”
e3“At high rotational speeds, the precision of rice bunch planting with the seed disturbance structure is better than that without the seed disturbance structure”
Claim · model-written summary
In simulation, the seed velocity and total force magnitude were lower in the meter without disturbance structures than with the disturbed structure.
- Taxon
- RiceOryza sativat0
- Treatment
- disturbed structuree6
- Outcome
- seed velocity and total force magnitudee6
- Direction
- lesse6
- Comparator
- the meter without disturbance structurese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the Double-Hole Rice Vacuum Seed Meter”
e6“In the simulation test, the seed velocity and total force magnitude of the meter without disturbance structures were less than those with the disturbed structure”
Claim · model-written summary
In simulation, seed disturbance breaks up the stacked state of seeds.
- Taxon
- RiceOryza sativat0
- Treatment
- seed disturbance structuree4
- Outcome
- stacked state of seedse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the Double-Hole Rice Vacuum Seed Meter”
e4“Simulation experiments showed that the seed disturbance structure breaks up the stacked state of seeds”
Claim · model-written summary
Seed disturbance improves seed mobility, which enhances the precision of bunch planting.
- Taxon
- RiceOryza sativat0
- Treatment
- Seed disturbancee5
- Outcome
- precision of bunch plantinge5
- Qualifier
- improves seed mobilitye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the Double-Hole Rice Vacuum Seed Meter”
e5“Seed disturbance improves seed mobility, thereby enhancing the precision of bunch planting”
Claim · model-written summary
The shaped hole holds the seed in a stable suction posture, which helps increase the seed-filling rate.
- Taxon
- RiceOryza sativat0
- Treatment
- shaped holee7
- Outcome
- seed-filling ratee7
- Qualifier
- holds the seed in a stable suction posturee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the Double-Hole Rice Vacuum Seed Meter”
e7“Research has shown that the shaped hole holds the seed in a stable suction posture, which helps to increase the seed-filling rate”