Magnetic Marker Installation with Pre-Magnetization
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Solution Overview
Problem
Conventional magnetic marker systems require close spacing for lane departure warning and automatic driving, leading to increased installation costs due to inefficient work processes.
Innovation Solution
A method and system for efficiently installing magnetic markers on roads using a magnetizing process with a magnetic field, eliminating the need for manual polarity checks and allowing for re-magnetization of demagnetized markers, reducing installation and maintenance costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic markers are laid at relatively short spacing for lane departure warning, then driving assist performance is improved, but installation cost increases due to inefficient work processes
Solution Approach 1:
The magnetic marker is pre-magnetized during the manufacturing process before installation. This preliminary action ensures that the magnetic polarity is already established and correct when the marker is laid on the road, eliminating the need for time-consuming on-site polarity checks and adjustments, thereby reducing installation costs while maintaining the required driving assist performance
Solution Approach 2:
The magnetic marker automatically provides its magnetic field for detection without requiring external activation or adjustment during installation. The pre-established magnetic polarity enables the marker to function immediately upon installation, reducing the need for additional installation steps and equipment, thus lowering installation costs while ensuring reliable detection for driving assist systems
2Manufacturing precision
If manual polarity checking is performed for each magnetic marker, then installation accuracy is improved, but installation time and effort increase
Solution Approach 1:
Magnetic polarity is determined and established during the manufacturing process rather than during installation. This preliminary action transfers the quality control step to the factory setting, ensuring accurate polarity without requiring time-consuming on-site checks, thereby maintaining installation accuracy while significantly improving installation efficiency
Solution Approach 2:
The manual process of checking and adjusting magnetic polarity on-site is replaced by an automated magnetization process during manufacturing. This substitution eliminates the need for workers to perform repetitive polarity verification tasks, maintaining high installation accuracy through controlled manufacturing processes while dramatically improving overall installation productivity
3Reliability
If magnetic markers are replaced when demagnetized, then performance restoration is achieved, but installation and maintenance costs increase
Solution Approach 1:
Instead of discarding demagnetized magnetic markers and replacing them with new ones, the invention recovers their functionality by re-magnetizing them in place. This approach involves applying a magnetic field to restore the magnetic polarity of markers that have lost their magnetism over time, thereby maintaining marker performance while significantly reducing maintenance costs by avoiding the need for excavation and replacement operations
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 method and system enable efficient installation of magnetic markers with reduced time and effort, minimizing errors and costs associated with incorrect polarity and demagnetization, while maintaining initial performance without the need for marker replacement.
Implementation Method 1
a magnetizing apparatus which acts with a magnetic field toward a road surface
Implementation Method 2
a detecting apparatus which detects magnetism generated by the magnetic marker
Data Source
AI summary
A magnetic marker retaining method that includes placing a plurality of sheet-shaped magnetic markers on a surface of a band-shaped carrier sheet, the plurality of sheet-shaped magnetic markers being so as to be spaced in a longitudinal direction of the band-shaped carrier sheet; and retaining the plurality of sheet-shaped magnetic markers in a state of a roll body with the band-shaped carrier sheet rolled up in a roll shape, the band-shaped carrier sheet being rolled up such that each surface of the plurality of sheet-shaped magnetic markers directly contacts the other side of the surface of the band-shaped carrier sheet, on which the plurality of sheet-shaped magnetic markers are placed, and the plurality of sheet-shaped magnetic markers being to be laid on a road.