Corn Header Deck Plate Positioning Control
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Solution Overview
Problem
Current corn header systems face challenges in controlling deck plate positioning and pinching force, leading to issues such as stalk breakage, kernel loss, and trash accumulation due to inadequate channel width and pinching force adjustments, especially when entering and aligning with corn rows.
Innovation Solution
A system and method for automatically controlling deck plate positioning and pinching force, using sensors and actuators to expand or narrow the stalk receiving channel based on triggering events like header height changes and stalk presence, with a processor-based controller to maintain desired channel width and pinching force for efficient harvesting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the deck plate spacing is increased to enlarge the channel, then trash can fall through more easily, but stalk support is reduced causing whip and breakage
Solution Approach 1:
The deck plate spacing is made dynamically adjustable rather than fixed. The system automatically modifies the channel dimensions in real-time based on operating conditions, transitioning between different spacing configurations to optimize both trash removal and stalk support as needed
Solution Approach 2:
The physical parameter of deck plate spacing is changed based on operational phase. During entry/alignment, larger spacing is used; during harvesting, smaller spacing is applied. This parameter modification resolves the contradiction by applying different spacing values for different functional requirements
2Strength
If the deck plate spacing is decreased to increase stalk support, then stalk breakage is reduced, but trash accumulation increases
Solution Approach 1:
The system dynamically adjusts deck plate spacing to transition between support-oriented and trash-removal-oriented configurations, rather than maintaining a static spacing that would compromise either function
Solution Approach 2:
The system performs preliminary alignment with larger spacing before transitioning to harvesting mode with smaller spacing, preparing the channel for optimal performance before the contradiction becomes critical
3Ease of operation
If manual adjustment of deck plate position is used, then operator control is maintained, but response time and precision are insufficient
Solution Approach 1:
Sensors detect operating conditions (header height, stalk presence, channel alignment) and provide feedback to the control system, which automatically adjusts deck plate spacing in real-time, eliminating the delay inherent in manual observation and adjustment
Solution Approach 2:
The system performs self-adjustment of deck plate positioning based on sensor input and control logic, eliminating the need for continuous manual intervention while maintaining optimal performance
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 of deck plate positioning and pinching force, reducing stalk breakage, kernel loss, and trash accumulation by automatically adjusting channel width and force to optimize stalk alignment and throughput during corn harvesting.
Implementation Method 1
the second deck plate is spring mounted to bring the edges of the deck plates to bear against the largest diameter stalks currently located therein while exerting a pinching force
Data Source
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AI summary
The system and method automatically controls the position of at least one deck plate (28) of a harvesting unit (24) of a corn header (22) so as to increase the width (W) of a stalk receiving channel (30) or reduce pinching forces between the plates (26, 28) when entering a stand of corn to facilitate alignment with the corn rows, and to change the position after a suitable time period or other condition or event, to narrow the channel width (W) and/or increase pinching force, to reduce kernel loss while also monitoring forces exerted against the plates (26, 28) by the stalks and responsively adjusting the plate position for maintaining a desired force on the stalks (32) or width (W).