Paving Machine Load Monitoring for Material Weight Accuracy
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Solution Overview
Problem
Current methods for monitoring the productivity of paving machines, such as manual weight tickets, are inefficient and inaccurate due to varying material density and temperature changes, making it difficult to ensure the correct amount of material is supplied.
Innovation Solution
A system and method utilizing a load monitoring device and controller to track changes in load on the paving machine's frame, determining the weight of material delivered based on signal inputs, which improves accuracy and efficiency in monitoring productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If manual weight tickets are used to track material tonnage, then the method is simple to implement, but the accuracy and efficiency of productivity monitoring deteriorates
Solution Approach 1:
The patent replaces manual weight tickets and mechanical weighing methods with an automated load monitoring device that uses sensors (such as strain gauges or load cells) to continuously measure the weight of material on the hopper. This electronic measurement system eliminates human error and provides continuous, accurate data without requiring manual intervention or physical weight tickets.
Solution Approach 2:
The load monitoring device automatically monitors and records material weight without requiring operator intervention. The system self-calibrates and continuously tracks the weight changes in the hopper, providing autonomous productivity monitoring that eliminates the need for manual weight tickets and reduces labor requirements.
2Ease of operation
If predefined density values are used for weight calculation, then the calculation process is simplified, but the accuracy deteriorates due to temperature and density variations
Solution Approach 1:
The patent replaces density-based calculation methods with direct weight measurement using load monitoring devices. Instead of calculating weight from volume and predefined density values, the system directly measures the actual weight of material in the hopper using sensors, eliminating the need for density assumptions and temperature corrections.
Solution Approach 2:
The load monitoring device provides continuous feedback on actual material weight, allowing the system to adapt to real-time conditions. The controller receives signals from the load monitoring device and continuously updates the recorded weight, providing accurate measurements that reflect actual material density and weight without relying on predefined values.
3Measurement precision
If automated load monitoring devices are installed, then the accuracy of material weight measurement is improved, but the device complexity increases
Solution Approach 1:
The load monitoring device is integrated into the existing hopper structure and serves multiple functions: it measures material weight, monitors productivity, and provides data for operational control. By combining these functions into a single integrated system, the patent reduces overall complexity compared to having separate measurement and control systems.
Solution Approach 2:
The patent merges the load monitoring device with the hopper structure and integrates it with the existing controller system. The load monitoring device communicates directly with the controller, combining measurement and control functions into a unified system that reduces the number of separate components and simplifies the overall architecture.
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
The system accurately determines the weight of material delivered and discharged, enhancing productivity monitoring and ensuring correct material supply, while accounting for density variations and operational modes.
Implementation Method 1
a load monitoring device located on a mount between a traction device and a frame of the paving machine. The load monitoring device is configured to provide a signal indicative of a change in a load on the frame of the paving machine
Data Source
AI summary
A method of monitoring a productivity of a paving machine. The method includes receiving a signal, through a load monitoring device, indicative of a change in a load on a frame of the paving machine. The method also includes determining a sum value of the change in the load on the frame based on the signal received each time when a material is delivered to the paving machine, and when the signal indicates an increase in the load on the frame. The method further includes determining a weight of the material provided to the paving machine based on at least the sum value of the change in the load.