Harvester Billet Length Feedback Control for Uniform Crop Cutting
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Solution Overview
Problem
Harvesters face challenges in efficiently cutting and processing crops into uniform billets while separating extraneous plant matter, as existing systems lack precise control over cutting and feed speeds, leading to inconsistent billet lengths and poor cleaning efficiency.
Innovation Solution
A harvester equipped with an optical sensor and control system that adjusts cutting, feed, and cleaning speeds based on real-time billet length measurements, allowing operators to set target billet parameters for optimal processing and cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fixed cutting speed and feed speed are used, then the system is simple to operate, but billet length consistency deteriorates
Solution Approach 1:
The patent implements a closed-loop feedback control system where an optical sensor measures the actual billet length and feeds this information back to the control system. The controller compares the measured length with the target length and automatically adjusts the cutting speed or feed speed to correct any deviations, thereby achieving consistent billet length without manual intervention.
Solution Approach 2:
The patent replaces manual mechanical speed adjustment with an automated electronic control system. The controller uses electronic signals to dynamically adjust the cutting speed or feed speed based on real-time billet length measurements, eliminating the need for operators to manually change mechanical settings and improving precision.
2Productivity
If manual speed adjustment is used, then the control system is simple, but processing efficiency deteriorates
Solution Approach 1:
The control system performs self-adjustment by automatically detecting billet length deviations and correcting them without operator intervention. The system monitors its own performance through the optical sensor and autonomously modifies cutting or feed speeds to maintain optimal processing conditions, thereby improving efficiency while requiring minimal automation infrastructure.
3Productivity
If high cleaning speed is used, then cleaning efficiency is improved, but cleaning quality deteriorates
Solution Approach 1:
The patent applies dynamic speed adjustment to the cleaning system, allowing the cleaning speed to vary based on real-time conditions. The controller can reduce cleaning speed when complex cleaning is needed to maintain quality, and increase it when simpler cleaning suffices, thereby optimizing both efficiency and quality throughout the cleaning process.
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 solution enables precise control over billet length and consistency, improving crop processing efficiency, reducing residue, and enhancing cleaning performance by dynamically adjusting operational speeds in response to sensor data.
Implementation Method 1
an optical sensor configured to generate a signal corresponding to a length of the crop billet
Data Source
AI summary
A harvester includes a feed system operable at a feed speed and configured to feed a crop towards a blade. The blade is configured to cut the crop into crop billet and is operable at a cutting speed. The harvester further includes an optical sensor configured to generate a signal corresponding to a length of the crop billet and a control system with a processor, a memory, and a human-machine interface. The control system is configured to receive the signal and programmed to adjust one or both of the cutting speed or the feed speed based on the signal.