Articulated Joint Force Measurement for Compaction Quality
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Solution Overview
Problem
Existing compaction systems face inefficiencies and inaccuracies in determining compaction quality due to the need for time-consuming and disruptive methods of measuring density, which can affect the finished product, especially in sensitive applications like asphalt roads.
Innovation Solution
A compaction system with an articulated joint and a force sensor that generates a signal indicative of propulsion force, allowing a controller to determine compaction performance based on this measurement, thereby improving accuracy and reducing uncertainty.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If direct density measurements are performed by removing core samples or using displacement devices, then measurement precision of material density is improved, but the work surface is disturbed and the finished product is adversely affected
Solution Approach 1:
The patent uses an intermediary measurement approach by measuring the compaction force through the articulated joint rather than directly measuring density. The force sensor acts as an intermediary that provides indirect but non-intrusive measurement of compaction quality, avoiding the need to disturb the work surface with core samples or displacement devices.
2Measurement precision
If traditional density measurement methods are used, then compaction quality can be determined, but additional time and work are required which reduces compaction efficiency
Solution Approach 1:
The compaction system performs self-measurement by using its own compaction force as the measurement parameter. The force sensor integrated into the articulated joint allows the compactor to automatically monitor its own performance in real-time during operation, eliminating the need for separate post-compaction density testing and significantly improving productivity.
Solution Approach 2:
The patent enables continuous measurement of compaction quality throughout the entire compaction process by integrating the force sensor into the compaction system. This allows real-time monitoring and immediate detection of compaction quality issues, whereas traditional methods require stopping work to perform discrete density tests at sample locations.
3Productivity
If propelling power is used as a basis for monitoring energy interaction, then compaction quality can be monitored, but uncertainty in the determination increases
Solution Approach 1:
The patent replaces the indirect propelling power measurement with a direct mechanical force measurement through the articulated joint. The force sensor provides direct measurement of the compaction force transmitted to the work surface, eliminating the uncertainties associated with using propelling power as a proxy for compaction quality.
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
Enhances the accuracy and efficiency of compaction performance determination by directly measuring propulsion force through the articulated joint, reducing the need for disruptive density measurements and improving the quality of compacted surfaces.
Implementation Method 1
a force sensor configured and arranged to generate a signal that is indicative of a propulsion force transferred through the articulated joint
Data Source
AI summary
A compaction system includes a first frame; a second frame coupled to the first frame via an articulated joint; a first propulsion device operatively coupled to the first frame via a first propulsion motor, the first propulsion device being configured to propel the compaction system over a work surface in response to a power applied by the first propulsion motor; a compaction drum operatively coupled to the second frame, the compaction drum being configured to compact the work surface via rolling engagement with the work surface; a force sensor configured and arranged to generate a signal that is indicative of a propulsion force transmitted through the articulated joint; and a controller operatively coupled to the force sensor. The controller is configured to determine compaction performance of the compaction system against the work surface based at least in part on the signal from the force sensor.