Sod Harvester Stacking Head Dynamic Path Calculation
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Solution Overview
Problem
Sod harvesters face challenges in preventing collisions between the stacking head and the harvester's frame during dynamic adjustments of the pickup position, which can lead to damage and inefficiencies in the stacking operation.
Innovation Solution
A control system with a dynamic path calculator calculates a virtual fence for the stacking head to detect potential collisions with the frame envelope, allowing it to dynamically adjust the path and avoid collisions while optimizing for efficiency and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the pickup position is dynamically adjusted during stacking operation, then the stacking efficiency and adaptability are improved, but the risk of collision between the stacking head and the frame increases
Solution Approach 1:
The control system performs preliminary collision detection by calculating a virtual fence representing the stacking head's future position and comparing it with the frame envelope before the stacking head actually moves. This advance detection allows the system to identify potential collision paths and adjust the pickup position or stacking sequence proactively, preventing collisions before they occur while maintaining dynamic positioning capabilities for efficiency
Solution Approach 2:
The system continuously monitors the stacking head's position and dynamically recalculates the virtual fence and collision risk during operation. When a potential collision is detected, the control system provides feedback to adjust the pickup position or stacking sequence in real-time, allowing the system to adapt dynamically while maintaining high productivity through optimized path planning
2Speed
If the stacking head follows a direct path between pickup and stacking positions, then the operation speed is improved, but the likelihood of intersecting with the frame envelope increases
Solution Approach 1:
The control system calculates the virtual fence representing the stacking head's projected position and compares it with the frame envelope before executing the direct path movement. This preliminary collision detection allows the system to approve direct paths when safe, maximizing speed, while automatically detecting and avoiding paths that would intersect with the frame
Solution Approach 2:
The system dynamically adjusts the stacking head's path based on real-time calculations. When the direct path is safe, the stacking head follows it at high speed. When a collision risk is detected, the system dynamically modifies the path to avoid the frame while minimizing deviation from the direct route, thus maintaining operational speed while avoiding collisions
Data Source
AI summary
A stacking head's path can be dynamically calculated during a stacking operation. A control system of a sod harvester can include a dynamic path calculator for performing these dynamic calculations to prevent the stacking head from colliding with the sod harvester's frame or to cause the stacking head to traverse the most efficient path between the pickup position and the stacking position. These dynamic calculations could be performed in scenarios where the pickup position may be dynamically adjusted for a particular stacking operation.