Road Roller Height Profile Comparison for Layer Thickness
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Solution Overview
Problem
Current methods for determining the thickness of paving layers during road construction are complex, time-consuming, and costly, making it difficult to accurately measure the layer thickness after compaction, which can lead to unnecessary material usage and non-compliance with minimum thickness requirements.
Innovation Solution
A method using a self-propelled road roller equipped with a height reference sensor and a distance sensor to create and compare height profiles of the undeveloped and developed areas, allowing for precise determination of layer thickness by accounting for vibrations and inclinations, and enabling real-time feedback for adjusting the paving material application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual methods are used to determine layer thickness after compaction, then measurement accuracy can be achieved, but the process becomes complex, time-consuming and costly
Solution Approach 1:
The height profile of the ground is measured and stored before the paving layer is installed. This preliminary measurement allows the actual layer thickness to be calculated later by comparing it with the height profile after compaction, eliminating the need for complex manual measurements after the fact.
Solution Approach 2:
Manual measurement methods are replaced with an automated system using height reference sensors and distance sensors mounted on the road roller. The system automatically captures height profiles before and after compaction and calculates layer thickness through electronic processing, eliminating time-consuming manual interventions.
2Ease of operation
If layer thickness is measured before compaction, then measurement process is simpler, but the measured thickness does not reflect the actual installed thickness after compaction
Solution Approach 1:
The height measurement process continues throughout the entire paving and compaction operation. The system measures the ground height before paving, then measures the surface height after compaction, maintaining continuous monitoring to ensure the final measurement reflects the actual installed thickness.
Solution Approach 2:
The system provides feedback by comparing the preliminary ground height profile with the final surface height profile after compaction. This feedback mechanism ensures that the calculated layer thickness accurately reflects the actual installed thickness, allowing for real-time adjustments if necessary.
3Reliability
If more paving material is applied to ensure minimum thickness requirements, then compliance is guaranteed, but material costs increase unnecessarily
Solution Approach 1:
The system measures and calculates the actual layer thickness after compaction and provides feedback on whether minimum requirements are met. This feedback allows for precise control of material application, ensuring compliance without unnecessary excess material application.
Solution Approach 2:
The system enables dynamic adjustment of paving parameters based on real-time measurements. By monitoring the actual layer thickness and comparing it with minimum requirements, the system can optimize material application rates to achieve compliance while minimizing waste.
Data Source
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AI summary
Method (20) for determining the thickness of the paving layer laid by a paver (14) using a self-propelled road roller (1), comprising the steps of: establishing (21) a height reference, creating (22) a height profile of the area to be paved, laying (23) the paving layer, measuring (24) the height position of a height reference sensor (10) of a self-propelled road roller (1) relative to the height reference, measuring (25) the position of the height reference sensor (10) relative to the ground (8), determining (26) a height profile of the paved area, and determining (27) the thickness (D) of the paving layer from the two height profiles. Furthermore, there is also a self-propelled road roller (1) for carrying out the method (20).