Planter Row Unit Height Control for Consistent Seed Depth
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Solution Overview
Problem
Existing agricultural planting methods struggle to precisely control the depth of seed placement, leading to uneven crop growth due to variations in trench depth affected by soil type, moisture, and operation of planting mechanisms.
Innovation Solution
An agricultural implement with a row unit frame and opening discs that are vertically fixed relative to the frame, coupled with a biasing member to adjust the frame's height and maintain the discs at a selected elevation, and sensors to measure soil height, allowing for precise trench depth control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional disc-based trench formation is used, then the planting process is simple, but seed depth control is imprecise due to soil type, moisture, and operation variations
Solution Approach 1:
The row unit frame is made height-adjustable through actuators that dynamically modify the vertical position of the opening discs relative to the ground surface. This dynamic adjustment capability allows the system to compensate for variations in soil conditions and maintain precise seed depth control, directly resolving the contradiction between precision and simplicity.
Solution Approach 2:
Sensors are integrated into the row unit to detect ground surface height and provide real-time feedback to the control system. This feedback mechanism enables closed-loop control of the opening disc depth, ensuring precise seed placement despite variations in soil type, moisture, and operational conditions, thereby achieving high manufacturing precision without excessive complexity.
2Productivity
If seed depth is not precisely controlled, then the planting process is faster, but crop growth becomes uneven resulting in reduced yields
Solution Approach 1:
Sensors mounted on the row unit frame detect the ground surface height ahead of the opening discs and provide feedback to the control system. This enables real-time adjustment of the row unit frame height to maintain consistent seed depth, ensuring uniform crop emergence and growth while preserving planting speed and productivity.
Solution Approach 2:
The system replaces purely mechanical depth control methods with an automated control system that uses sensors and actuators. This substitution enables precise, consistent seed depth control across varying field conditions, directly improving crop yield by ensuring uniform seed placement without sacrificing planting efficiency.
3Manufacturing precision
If the row unit height is manually adjusted, then the system is simpler, but depth control is inconsistent across different soil conditions
Solution Approach 1:
The row unit is equipped with sensors that automatically detect ground surface height and actuators that self-adjust the opening disc depth without manual intervention. This self-service capability maintains consistent trench depth across varying soil conditions while eliminating the need for manual height adjustments, thereby improving both precision and ease of operation.
Solution Approach 2:
Manual mechanical height adjustment is replaced with an automated electro-hydraulic or electro-mechanical actuation system controlled by sensor feedback. This substitution enables consistent trench depth control across different soil conditions while simplifying operation, as the system automatically adapts to changing field conditions without operator intervention.
Data Source
AI summary
An agricultural implement includes a row unit frame (202) coupled to a draw bar (204) by a height-adjustable mount, a set of opening discs (212) coupled to the row unit frame such that the opening discs are vertically fixed relative to the row unit frame, and a biasing member (210) configured to adjust a height of the row unit frame to maintain the opening discs in soil at a selected elevation relative to the draw bar. A method of planting may include determining a height of a draw bar relative to a surface of soil, and adjusting a height of the row unit frame relative to the draw bar to apply a force to push a seed trench opening assembly into the soil and form a trench therein. The height of the row unit frame relative to the draw bar may be independent of the hardness of the soil.