High-Frequency Seed Singulation via Rotational Acceleration
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Solution Overview
Problem
Conventional seed distribution devices struggle to achieve high seed deposit densities and uniform seed placement for crops like wheat, barley, or oats, often resulting in uneven seed allocation due to limitations in seed separation and acceleration rates.
Innovation Solution
A precision sowing device with a separating unit that generates individual grains from a material flow and an acceleration unit that rotates to increase the spatial distance between grains, allowing for targeted and high-frequency deposition, overcoming the limitations of conventional systems by using multiple rows of holes and advanced transfer mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional separating devices are used to separate seeds, then the separation process is simple, but the seed placement frequency is limited to 30-35 grains per second and uniformity is poor
Solution Approach 1:
The separating device is divided into multiple independent separating units (e.g., multiple disks or drums with holes), each capable of separating seeds individually. This segmentation allows parallel processing of seeds, increasing the overall placement frequency from 30-35 grains per second to over 120 grains per second while maintaining reliable singulation quality.
Solution Approach 2:
An acceleration unit is introduced as an intermediary component between the separating unit and the sowing coulter. This acceleration unit receives separated seeds, accelerates them through rotational motion, and delivers them to the placement position. This intermediary mechanism enables high-speed seed delivery without compromising the separation quality, resolving the contradiction between productivity and reliability.
2Ease of operation
If air flow is used to convey grains, then the conveying process is simple, but the grain supply continuity is impaired and seeds are deposited unevenly
Solution Approach 1:
The conventional air flow conveying system is replaced with a mechanical conveying approach using rotating separating units with holes. Seeds are picked up individually by the rotating disks or drums and transferred mechanically to the acceleration unit. This mechanical substitution ensures continuous grain supply and uniform deposition while maintaining operational simplicity through the automated rotational mechanism.
3Manufacturing precision
If complex pre-treatment is applied to achieve high deposit density, then the seed placement uniformity improves, but the device complexity and preprocessing requirements increase
Solution Approach 1:
The separating unit performs preliminary singulation of seeds before they enter the acceleration unit. By picking up individual seeds through holes in rotating disks or drums, the system ensures that seeds are already separated and positioned correctly before acceleration. This preliminary action eliminates the need for complex post-separation adjustments and achieves high placement uniformity directly at the separation stage.
Solution Approach 2:
The system changes the operational parameters of the separating units, specifically the rotation speed and hole distribution patterns. By optimizing these parameters, the device achieves high seed placement frequency (over 120 grains per second) with reliable singulation quality, eliminating the need for complex pre-treatment systems while maintaining high precision.
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
This solution enables higher seed placement rates, achieving longitudinal distribution quality and reducing positional variations, thereby improving seed allocation and reducing the risk of seed jumping in the furrow.
Implementation Method 1
an acceleration unit which takes over the separated grains from the separating unit, accelerates them with rotation and passes them on to the sowing coulter
Data Source
Figure 1
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AI summary
The present invention provides a single-seed seeding device for the targeted placement of granular material, in particular seeds and/or fertilizer, comprising at least one singulation unit (100; 200; 300; 400a, 400b; 600a, 600b) which generates a sequence of individual grains (192) from a stream of material and transfers them to a placement unit (120; 220; 320; 420; 620), in particular to a seed coulter, wherein an acceleration unit (110; 210; 310; 410; 610) is arranged between the singulation unit and the placement unit, which takes the singulated grains from the singulation unit, accelerates them under an acceleration process, such as rotation, orbit on a circular path or in a translational direction of movement and transfers them to the placement unit.