Seed Meter Switching for Variety Purity
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Solution Overview
Problem
Current seeding machines are inefficient in switching between multiple seed varieties in a field, leading to significant mixing of seeds and incomplete planting due to the lack of precise control over seed supply and switching mechanisms.
Innovation Solution
A seeding machine equipped with multiple row units, pneumatic seed delivery systems, and a vacuum seed meter with a switching mechanism, controlled by a variable rate/variety controller, which allows for precise switching between seed varieties by determining the programmed quantity of seed in the meter and adjusting the seed application rate based on location and operational parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the seeding machine switches between seed varieties using conventional mechanisms, then it can plant multiple varieties in a field, but significant mixing of seeds occurs and planting coverage becomes incomplete
Solution Approach 1:
The system performs preliminary actions by calculating the distance to variety switch points and determining the programmed quantity of seed in the meter before switching occurs. The controller anticipates the need to switch varieties and prepares by monitoring seed meter levels and calculating when to close gates based on pre-determined switch points, ensuring complete coverage without mixing.
Solution Approach 2:
The system uses feedback by continuously monitoring the quantity of seed in the meter and comparing it against the programmed quantity. The controller adjusts gate closure timing based on real-time seed level feedback and calculated distances to switch points, ensuring precise variety transitions and complete field coverage without unplanted areas.
2Productivity
If the machine operates continuously without stopping to switch varieties, then productivity is maintained, but seed mixing occurs at switching points
Solution Approach 1:
The system performs preliminary gate closure actions based on pre-calculated distances to variety switch points. Before the physical switching point is reached, the controller closes the appropriate gates to prevent seed mixing, allowing continuous machine operation while maintaining variety purity through advance preparation.
Solution Approach 2:
The system dynamically adjusts gate positions and timing based on real-time machine position, seed meter levels, and calculated switch points. The controller continuously monitors operational parameters and dynamically controls the timing of gate closures to prevent mixing while maintaining continuous productivity.
3Manufacturing precision
If the seed meter is emptied completely to prevent mixing, then variety purity is improved, but unplanted areas are created due to incomplete seed supply
Solution Approach 1:
The system performs preliminary gate closure actions at calculated distances from variety switch points, not when the meter is completely empty. The controller determines the optimal timing to close gates based on pre-calculated switch points and monitored seed quantities, ensuring variety purity while maintaining continuous seed supply to prevent unplanted areas.
Solution Approach 2:
The system uses feedback from seed level monitoring to determine when to close gates, comparing actual seed quantities against programmed quantities and calculated distances to switch points. This feedback mechanism ensures variety purity through timely gate closure while preventing unplanted areas by maintaining appropriate seed supply levels.
4Adaptability or versatility
If multiple seed tanks and pneumatic delivery systems are used to supply different varieties, then adaptability to plant multiple varieties is improved, but device complexity increases
Solution Approach 1:
The system uses a universal pneumatic delivery system that can supply multiple seed varieties through a single seed meter. The same vacuum seed meter and pneumatic delivery infrastructure serve multiple tanks, reducing overall system complexity compared to having separate delivery systems for each variety while maintaining full multi-variety planting capability.
Solution Approach 2:
The system merges multiple seed supply streams into a single seed meter through a common pneumatic delivery system. Multiple tanks are integrated through one vacuum meter using gate-controlled switching, consolidating what could be separate delivery systems into a unified multi-functional apparatus, thereby reducing complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Minimizes seed variety mixing and ensures complete coverage by accurately determining the seed pool size and application rate, allowing for efficient switching between seed varieties without leaving unplanted areas, thereby optimizing seed distribution and field coverage.
Implementation Method 1
Seed from two or more tanks is delivered to the mini-hopper pneumatically through tubes
Implementation Method 2
A vacuum seed meter meters seed to deliver individual seeds sequentially
Data Source
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AI summary
A seeding machine, such as a row crop planter (20), is described which is adapted to switch between two or more seed varieties as the machine traverses a field. The control system uses a programmed quantity of seed representing a number of seeds in the seed meter that need to be substantially consumed once the flow of a first seed variety is stopped before introducing a second seed variety to minimize seed mixing. The seed quantity can be determined by a calibration process or published from the manufacturer or third parties. The seed quantity can also be part of a seeding prescription that includes assignment of where each seed variety is to be planted in a field. The seed quantity and the distance traveled to empty the meter can be used to optimize the planting operation including the machine direction which can also be part of the prescription.