Hydraulic Downforce Control for Row Units
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Solution Overview
Problem
Agricultural equipment lacks efficient control systems for adjusting downforce on row units to adapt to varying soil conditions, leading to inconsistent seed depth and reduced productivity.
Innovation Solution
The implementation of a hydraulic system with a soil-penetrating tool, gauge wheel, and sensors to detect soil hardness, coupled with a controllable actuator and control system that adjusts the downforce in real-time, allowing for precise control of row units to maintain consistent seed depth across different soil conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual downforce adjustment is used on row units, then the system is simple and easy to operate, but seed depth consistency deteriorates under varying soil conditions
Solution Approach 1:
The patent implements a feedback control system where sensors detect actual seed depth or soil resistance, this information is fed to a controller that automatically adjusts hydraulic downforce on row units. This closed-loop feedback mechanism maintains consistent seed depth across varying soil conditions without manual intervention, resolving the contradiction between precision and complexity by automating the adjustment process.
Solution Approach 2:
The patent replaces manual mechanical adjustment of downforce with an automated hydraulic control system actuated by electric motors or hydraulic cylinders. This substitution eliminates the need for operators to manually adjust weights or mechanical linkages, providing precise and responsive downforce control that adapts to real-time soil conditions, thereby improving seed depth consistency while managing system complexity through automation.
2Productivity
If fixed downforce is applied to row units, then the hydraulic system is simple, but planting efficiency deteriorates on varying terrain
Solution Approach 1:
The patent implements a dynamic downforce control system that continuously adjusts the weight or hydraulic pressure applied to each row unit based on real-time soil conditions detected by sensors. This dynamic adjustment allows the planting equipment to adapt to varying terrain and soil hardness, maintaining optimal planting efficiency throughout the field, while the hydraulic system provides the necessary actuation force for these adjustments.
Solution Approach 2:
The patent changes the downforce parameter dynamically by adjusting hydraulic pressure or weight distribution on individual row units based on detected soil conditions. The system monitors soil hardness, resistance, or seed depth and modifies the downforce parameter in real-time to optimize planting efficiency across different soil types and terrain conditions, resolving the contradiction between fixed simplicity and variable performance.
3Manufacturing precision
If real-time downforce adjustment is implemented, then seed depth consistency improves, but energy consumption increases
Solution Approach 1:
The patent implements partial adjustment of downforce by applying corrective hydraulic pressure only when and where soil conditions deviate from optimal planting parameters. Rather than continuously adjusting all row units, the system selectively modifies downforce on affected row units based on sensor feedback, reducing overall energy consumption while maintaining seed depth consistency in critical areas.
Solution Approach 2:
The patent optimizes energy consumption by making incremental parameter changes to downforce rather than large, frequent adjustments. The hydraulic system adjusts pressure in small steps based on the degree of deviation from target seed depth, minimizing energy usage while achieving the necessary precision for consistent planting across varying soil conditions.
Data Source
AI summary
An agricultural implement includes at least one row unit having a plurality of support members, each of which is pivotably coupled to an attachment frame or another of the support members to permit vertical pivoting vertical movement of the support members, and a plurality of soil-engaging tools, each of which is coupled to at least one of the support members. A plurality of hydraulic cylinders are coupled to the support members for urging the support members downwardly toward the soil. A plurality of controllable pressure control valves are coupled to the hydraulic cylinders for controlling the pressure of hydraulic fluid supplied to the cylinders. A plurality of sensors produce electrical signals corresponding to predetermined conditions, and a controller is coupled to the sensor and the controllable pressure control valves. The controller receives the electrical signals from the sensors and produces control signals for controlling the pressure control valves.