Toolbar Position Sensors and Actuators for Seed Placement
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Solution Overview
Problem
Current agricultural implements face challenges in precisely placing seeds due to variations in soil type, moisture, and terrain, leading to uneven crop growth, as the depth of seed placement is influenced by soil conditions and the operation of row units.
Innovation Solution
Incorporating position sensors and actuators in agricultural implements to adjust the toolbar positions relative to the ground, allowing for precise control of seed placement by sensing the position of ground-engaging row units and adjusting the toolbars to maintain optimal depth and alignment with the terrain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional fixed toolbar positioning is used, then the implement structure remains simple, but seed placement precision deteriorates due to terrain variations
Solution Approach 1:
The patent implements dynamic toolbar positioning by replacing fixed mechanical linkages with actively controlled hydraulic actuators. Each toolbar section is equipped with position sensors that continuously monitor terrain elevation, and hydraulic actuators that dynamically adjust toolbar height in real-time to maintain consistent seed placement depth across varying terrain conditions.
Solution Approach 2:
The system incorporates position sensors on each toolbar section that provide feedback signals to the control system. This feedback loop enables the control system to monitor actual toolbar position and terrain conditions, then automatically adjust hydraulic actuator commands to maintain precise seed placement depth, compensating for terrain variations as they occur during field operation.
2Stability of the object's composition
If terrain compensation mechanisms are added, then seed placement uniformity improves, but the implement complexity increases
Solution Approach 1:
The implement is divided into multiple independently controllable toolbar sections, each equipped with its own position sensors and hydraulic actuators. This segmentation allows each section to independently compensate for local terrain variations, ensuring uniform seed placement across the entire implement width while distributing the control complexity across multiple simpler, identical modules.
Solution Approach 2:
Each toolbar section is equipped with integrated position sensors and control capabilities that enable it to autonomously detect terrain variations and adjust its own position. The self-service capability of each module reduces the need for complex centralized control, as each section independently maintains optimal seed placement depth based on real-time terrain feedback.
3Manufacturing precision
If real-time position sensing is implemented, then seed depth control improves, but energy consumption increases
Solution Approach 1:
The position sensors on each toolbar section perform measurements at periodic intervals rather than continuously, reducing energy consumption while maintaining adequate seed depth control. The hydraulic actuators operate in periodic adjustment cycles, making position corrections only when terrain variations exceed predetermined thresholds, thereby minimizing energy usage while preserving precision.
Data Source
AI summary
An agricultural implement includes a longitudinally extending frame configured to be coupled to a tractor, a first elongate toolbar extending laterally outward from the frame and carrying a first row unit, a second elongate toolbar extending laterally outward the frame and carrying a second row unit, a first sensor configured to sense a position of the first row unit relative to ground, a second sensor configured to sense a position of the second row unit relative to the ground, a first actuator configured to rotate the first elongate toolbar relative to the frame based at least in part on the sensed position of the first row unit, and an actuator configured to rotate the second elongate toolbar relative to the frame based at least in part on the sensed position of the second row unit. Control systems and related methods are also disclosed.