Paving Machine Emulsion Calibration via Mass and Area Feedback
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Solution Overview
Problem
Existing paving machines lack the ability to accurately calibrate emulsion fluid delivery based on both the mass and spray area of the fluid, leading to inconsistent application rates and bonding of paving materials to the ground surface.
Innovation Solution
A paving system with a controller and display interface that calibrates emulsion fluid delivery through multiple nozzles by measuring the mass and area of the spray pattern, allowing for precise adjustment of delivery rates based on inputted data, including the properties of different emulsion fluids and operating conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the control system only calibrates the mass or volume of coating material delivered without considering spray area, then the calibration process is simpler, but the application rate accuracy deteriorates
Solution Approach 1:
The system uses feedback from sensors that measure both the mass/volume of coating material delivered and the spray area coverage. This feedback loop allows the control system to continuously adjust pump rate based on actual application rate, achieving precise calibration that accounts for both material quantity and distribution area.
Solution Approach 2:
The invention transitions from one-dimensional calibration (mass or volume only) to two-dimensional calibration by incorporating spray area as an additional dimension. This allows the system to calculate true application rate as mass/volume divided by area, providing comprehensive accuracy in coating application.
2Ease of operation
If the pump rate is not adjusted based on ground speed, then the system operation is simpler, but the application rate consistency deteriorates
Solution Approach 1:
The system dynamically adjusts pump rate based on real-time ground speed measurements. As ground speed changes, the control system automatically modifies pump rate to compensate, maintaining consistent application rate across varying operating conditions. This dynamic adjustment ensures stability in coating application regardless of machine speed variations.
3Adaptability or versatility
If different treatment fluids with different properties are used without calibration adjustment, then the system is more versatile, but the delivery rate accuracy deteriorates
Solution Approach 1:
The system allows calibration parameters to be changed based on the specific treatment fluid being used. Different fluids with varying viscosity, density, and flow characteristics can be accommodated by adjusting calibration factors in the control system. This enables accurate delivery rate measurement and control for each fluid type while maintaining system versatility.
Data Source
AI summary
A paving system may include a paving machine, including a paving material delivery assembly, including a hopper, a conveyor assembly, an auger, and a screed. The paving machine may also include an emulsion fluid delivery assembly including a plurality of spray bars, wherein each spray bar includes one or more nozzles. The paving system may also include a controller and a display interface. The controller may be configured to receive inputs from the display interface indicative of a mass and an area of emulsion fluid delivered from one active nozzle in order to calibrate the emulsion fluid delivery assembly.