Steering-Responsive Paving Material Feed Adjustment for Uniform Distribution
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Solution Overview
Problem
Existing paving machines face issues with uneven or inconsistent distribution of paving material due to underflow or overflow conditions, particularly when turning or deviating from a linear path, affecting the quality of the road surface.
Innovation Solution
A material feed adjustment system that includes a steering input sensor and a controller to automatically control the speeds of left and right conveyors and augers based on the steering angle, maintaining a target pile size of paving material adjacent the screed assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the paving machine turns or deviates from a linear path, then the steering mechanism enables path change, but the left and right sides move at different speeds causing uneven material distribution
Solution Approach 1:
The system dynamically adjusts conveyor and auger speeds based on real-time steering angle feedback. When the paving machine turns, the controller modifies material delivery rates to compensate for differential side speeds, maintaining uniform material distribution despite changing direction
Solution Approach 2:
The steering input sensor provides continuous feedback on steering angle to the controller, which then adjusts material feed rates accordingly. This closed-loop system ensures that material distribution remains consistent even as the machine navigates curves or changes direction
2Ease of operation
If manual monitoring and control of material distribution is used, then operator intervention can adjust material flow, but response time is delayed and consistency is reduced
Solution Approach 1:
The system performs self-adjustment by automatically monitoring steering angle and modulating material feed rates without operator intervention. The controller independently manages conveyor and auger speeds based on steering inputs, eliminating the need for manual monitoring while maintaining consistent material distribution
Solution Approach 2:
The patent replaces manual mechanical control with an automated electronic control system. The steering input sensor and controller substitute for operator judgment and manual adjustment, providing more consistent and reliable material distribution through electronic regulation of conveyor and auger speeds
3Manufacturing precision
If conveyor and auger speeds are adjusted during turning, then material distribution can be maintained, but system complexity increases
Solution Approach 1:
The existing steering mechanism serves a dual function: it not only changes the machine's direction but also provides input signals for material feed control. By utilizing the steering input sensor already present for directional control, the system adds material distribution management without requiring separate complex sensing infrastructure
Solution Approach 2:
The patent combines the steering control function with material feed control into a unified system. The same steering input that directs the machine's path also triggers automatic adjustments in conveyor and auger speeds, merging two control functions into one integrated system that reduces overall complexity
Data Source
AI summary
A paving machine includes a frame, a drive assembly including a steering mechanism, a hopper, a screed assembly, a material delivery system disposed on the frame and configured to transport a volume of paving material to the screed assembly, and a material feed adjustment system. The material delivery system includes a left conveyor having a left conveyor speed, a right conveyor having a right conveyor speed, a left auger having a left auger speed, and a right auger having a right auger speed. The material feed adjustment system includes a steering input sensor configured to transmit a steering angle of the steering mechanism, and a controller in electronic communication with the steering input sensor. The controller is configured to automatically control the left conveyor speed, the right conveyor speed, the left auger speed and the right auger speed based on the steering angle to maintain the target pile size.