Harvester Residue Spreading Control Under Changing Wind Direction
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Solution Overview
Problem
Agricultural harvesters face challenges in evenly distributing residue throughout a field and avoiding discharge into unharvested areas, particularly during windy conditions, which can cause operational issues and uneven residue distribution leading to problems in subsequent planting and growing seasons.
Innovation Solution
The system senses wind direction using on-board and off-board sensors, interpolates wind data, and controls residue discharge mechanisms to avoid blowing residue into unharvested areas by adjusting discharge trajectory, speed, and direction based on wind conditions, and plans harvesting routes to mitigate wind gusts and inter-harvester interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If residue discharge mechanisms operate at high speed and wide spread during windy conditions, then residue distribution coverage increases, but residue is blown into unharvested areas causing operational issues
Solution Approach 1:
The residue discharge mechanism dynamically adjusts its operating parameters (speed, direction, spread angle) in real-time based on wind conditions and harvester position. The system transitions from static discharge settings to dynamic control that adapts to changing environmental conditions, allowing optimal residue distribution without blowing into unharvested areas.
Solution Approach 2:
The system uses sensors to detect wind direction and speed, then feeds this information back to the control system which adjusts discharge mechanism parameters accordingly. This closed-loop feedback ensures residue is distributed effectively while preventing discharge into unharvested areas by continuously monitoring and responding to environmental conditions.
2Device complexity
If harvester operates without wind direction sensing, then system complexity remains low, but residue distribution becomes uneven during windy conditions
Solution Approach 1:
The system introduces wind direction sensors and a control system as intermediaries between the environment and the residue discharge mechanism. These intermediary components sense wind conditions and mediate the discharge process, enabling precise control of residue distribution without requiring complex mechanical modifications to the harvester itself.
3Device complexity
If residue discharge trajectory is fixed, then mechanism simplicity is maintained, but residue cannot be directed away from unharvested areas under varying wind conditions
Solution Approach 1:
The discharge trajectory transitions from a fixed mechanical configuration to a dynamically adjustable system. The control system modifies discharge angle, speed, and direction in real-time based on wind conditions, allowing the same mechanism to adapt to varying environmental conditions without requiring multiple fixed configurations.
Solution Approach 2:
The system changes operational parameters (discharge speed, angle, direction) rather than altering the physical structure of the discharge mechanism. This allows the same hardware to achieve different residue trajectories by modifying control parameters, maintaining mechanical simplicity while gaining environmental adaptability.
Data Source
AI summary
A sensor senses wind direction and generates a sensor signal. A wind processor processes the sensor signal to identify a wind direction at a location of an agricultural harvester. An action signal is generated to control the agricultural harvester to avoid discharging residue from the agricultural harvester into unharvested crop, based upon the wind direction.