Zone Ground Force System for Agricultural Implements
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Solution Overview
Problem
Existing agricultural implement control systems struggle to adjust ground force independently across different row units, particularly in scenarios where tire-track rows require different ground force settings than other rows due to varying soil conditions.
Innovation Solution
A zone ground force system that allows operators to adjust ground force within specific zones independently of other zones, using hydraulic or pneumatic actuators and pressure control valves, enabling different pressure settings for row units based on soil hardness patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single pressure control valve is used to adjust ground force for all row units, then the system remains simple and cost-effective, but it cannot provide different ground force settings for tire-track rows versus other rows
Solution Approach 1:
The toolbar is divided into multiple zones, each controlled by its own pressure control valve. This segmentation allows different ground force settings for different rows based on soil conditions, while maintaining simplicity within each zone. The system groups row units into zones that can be independently adjusted.
Solution Approach 2:
Different zones are assigned different ground force characteristics based on local soil conditions. Tire-track rows receive higher ground force through dedicated pressure control, while other rows use standard pressure control. This local differentiation optimizes performance for specific ground conditions without requiring individual row control.
2Adaptability or versatility
If individual row units are assigned to different zones with separate pressure control, then different ground force can be applied to tire-track rows, but the system complexity and cost increase
Solution Approach 1:
The system segments row units into zones based on soil conditions, with each zone having its own pressure control valve. This segmentation provides the adaptability needed for different ground conditions while keeping each zone's configuration relatively simple and manageable.
Solution Approach 2:
The pressure control valves and actuators are designed to work across multiple row units within a zone, providing universal functionality. The same basic components are reused throughout the system, reducing manufacturing complexity while maintaining zone-based control capability.
3Ease of operation
If all row units are adjusted together using a single PRRV, then the system remains simple, but tire-track rows requiring more down pressure cannot be properly addressed
Solution Approach 1:
By segmenting the toolbar into zones with separate pressure control valves, the system can independently adjust ground force for tire-track rows versus other rows. This ensures reliable performance across different soil conditions while maintaining ease of operation through organized zone-based control.
Solution Approach 2:
Each zone is optimized for its specific ground conditions, with pressure control settings tailored to local requirements. This local quality approach ensures that tire-track rows receive the necessary down pressure while other rows operate with appropriate settings, improving overall reliability.
4Adaptability or versatility
If a PRRV is placed on each cylinder of every row unit, then each row unit can be individually adjusted, but the cost and complexity become unjustified for cultivators
Solution Approach 1:
Instead of controlling each row unit individually, the system segments multiple row units into zones, with each zone having its own pressure control valve. This reduces the number of valves from potentially dozens (one per row unit) to a manageable number (one per zone), making the system practical for cultivators.
Solution Approach 2:
Adjacent row units with similar ground force requirements are merged into the same zone, sharing a common pressure control valve. This merging reduces the total number of valves and control components while maintaining sufficient control capability for different soil conditions.
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 system provides improved performance by allowing fine-tuning of ground force to match field conditions, reducing soil compaction, and maintaining consistent row depth, while maintaining cost-effectiveness and simplicity compared to row-by-row control systems.
Implementation Method 1
The control system is comprised of hydraulic or pneumatic actuators and two or more pressure control valves
Implementation Method 2
The control system is comprised of hydraulic or pneumatic actuators and two or more pressure control valves
Data Source
AI summary
An agricultural implement is provided having a toolbar and a plurality of row units mounted along the toolbar for working rows of ground. Each of the row units comprises one or more working devices for working the ground and an actuator for varying a ground force applied by the row unit to the ground. The improvement comprises a control system which controls the actuators for multiple the row units so as to define a zone ground force system where first and second groups of the row units define first and second zones. The first group of row units in the first zone are operated together under a first down pressure to generate a first ground force to work a first plurality of rows in a field. The second group of row units in the second zone are operated together under a second down pressure to generate a second ground pressure greater than the first ground pressure to work a second plurality of rows of ground which are harder than the first plurality of rows.