Uniform Spreading Control Using Ultra-Low-Speed Pulsation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems struggle to achieve uniform material spreading at ultra-low vehicle speeds and when vehicles frequently stop and go, leading to non-uniform distribution and material accumulation.
Innovation Solution
A uniform spreading control system employing a control module with a uniform spreading controller that adjusts material transferring and spreading speeds using wave-enveloped pulse trains and timed operation differences to manage ultra-low speeds and frequent stops, ensuring consistent distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the vehicle speed becomes ultra-low, then the signal generated based on vehicle speed becomes too weak to trigger the material spreader, but the spreading device cannot operate at ultra-low speeds using conventional proportional control
Solution Approach 1:
The patent implements an ultra-low speed pulsation mode that generates periodic control signals instead of continuous proportional signals. When vehicle speed is below the threshold, the controller activates the material spreader in periodic pulses, allowing the spreading device to operate reliably at ultra-low speeds where conventional continuous control would fail to trigger the device.
2Manufacturing precision
If the vehicle drives in different speeds or frequently stops and goes, then the spreading uniformity deteriorates, but maintaining constant spreading speed is difficult under variable vehicle conditions
Solution Approach 1:
The patent employs feedback control by continuously monitoring vehicle speed and dynamically adjusting the material spreader operation. The controller compares actual vehicle speed with reference speed and modifies the spreading rate accordingly, ensuring spreading uniformity is maintained even when vehicle speed varies or during frequent stop-and-go operations.
Solution Approach 2:
The system transitions from static proportional control to dynamic control by implementing variable spreading rates based on real-time vehicle conditions. The controller dynamically adjusts spreading parameters including pulse width, pulse frequency, and duty cycle according to current vehicle speed, enabling adaptive response to changing operational conditions while maintaining spreading uniformity.
Data Source
AI summary
A uniform spreading control system includes a control module, which includes a basic controller and a uniform spreading controller, and connected to a vehicle speed detector, a material transferring device, and a material spreading device. The uniform spreading controller is configured to obtain a vehicle speed from the vehicle speed detector, and control a material transferring speed of the material transferring device and/or a material spreading speed of the material spreading device. The uniform spreading controller is configured to enable an ultra-low speed pulsation mode when the vehicle speed is lower than a vehicle speed lower limit.