Laser Thermal Ablation for Complete Pavement Marking Removal
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Solution Overview
Problem
Current methods for removing pavement markings often cause damage to road surfaces, leading to unsafe driving conditions due to incomplete removal and the presence of ghost stripes, especially at night or in rainy conditions.
Innovation Solution
A thermal ablation system using a laser-based method that aligns a vehicle with pavement markings, detects the type of marking and surface, and adjusts laser parameters to effectively remove markings without causing excessive damage, utilizing a laser system, sensor, and computing device to control the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional methods (water-blasting, soda blasting, dry ice blasting, grinding, shot blasting, sandblasting) are used to remove pavement markings, then the markings are removed, but damage to road surfaces occurs and ghost stripes remain
Solution Approach 1:
The patent replaces mechanical removal methods (grinding, blasting) with a laser-based thermal ablation system. The laser beam delivers concentrated thermal energy to vaporize pavement markings without mechanical contact, eliminating surface scarring and ghost stripes while achieving complete removal.
Solution Approach 2:
The system dynamically adjusts laser parameters (power, pulse duration, scanning speed) based on detected pavement marking type and surface conditions. This optimization ensures effective removal while minimizing thermal damage to the underlying road surface, resolving the contradiction between removal completeness and surface integrity.
2Productivity
If laser parameters are increased to improve removal efficiency, then productivity increases, but risk of surface damage increases
Solution Approach 1:
The system employs real-time sensor detection of pavement marking type and dynamic adjustment of laser parameters during operation. This allows the system to optimize removal speed for different marking materials while maintaining safe thermal thresholds to prevent substrate damage, achieving high productivity without excessive harm.
Solution Approach 2:
The system uses sensors to detect pavement and marking characteristics, feeds this information to the control system, which then adjusts laser parameters accordingly. This closed-loop feedback ensures maximum removal efficiency while preventing thermal damage to the road surface.
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 efficiently removes pavement markings with minimal damage to the surface, reducing the risk of ghost stripes and enhancing safety by ensuring complete removal, regardless of environmental conditions.
Implementation Method 1
activating the laser system to produce a laser beam; passing the laser beam over the type of pavement marking in a scan direction
Implementation Method 2
Disclosed are several embodiments of pavement-marking removal systems and methods using thermal ablation
Data Source
AI summary
The present disclosure provides for systems and methods for removing markings from pavement. In general, the present disclosure provides for methods of using thermal ablation for effectively removing pavement stripe markings without causing excessive damage to the pavement surface.