Magnetic Marker Positioning After Road Installation
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Solution Overview
Problem
Conventional magnetic markers require high positional accuracy and numerous markers at short spacings for driving assists, making installation costly.
Innovation Solution
A magnetic marker installation method and work system using a laying apparatus, detection apparatus, and positioning apparatus to identify marker positions, allowing for reduced accuracy in placement and eliminating the need for precise surveys, with the system comprising a work vehicle equipped with magnetic sensors and GPS/IMU for accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic markers are laid at short spacings with high positional accuracy, then driving assist functions can be achieved, but installation cost increases
Solution Approach 1:
Instead of laying markers at precisely predetermined positions as in conventional methods, this invention inverts the approach by allowing markers to be laid at arbitrary positions and then detecting their actual positions after laying. The detection apparatus identifies where markers were placed, and this detected position information is used for driving assist functions, eliminating the need for high-precision pre-planning and reducing installation costs
Solution Approach 2:
The invention replaces the mechanical surveying and precise positioning system with a magnetic detection system. A detection apparatus using magnetic sensors automatically detects the positions of magnetic markers after they are laid, substituting complex mechanical measurement processes with automated magnetic field detection, thereby reducing installation complexity and cost
2Manufacturing precision
If high accuracy survey is performed before laying, then marker positions can be precisely controlled, but installation time and cost increase
Solution Approach 1:
The invention performs the positioning action after rather than before the laying process. Instead of conducting preliminary surveys to determine marker positions, the system lays markers first and then performs detection to identify their actual positions. This reversal eliminates time-consuming pre-survey operations while still achieving accurate position data for the driving assist system
Solution Approach 2:
The detection apparatus automatically detects marker positions and generates position information without requiring manual surveying operations. The system serves itself by using the magnetic markers' own magnetic fields as the detection target, eliminating the need for external reference systems or complex surveying equipment
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 reduces installation costs by allowing for less precise placement of magnetic markers, shortening road closure periods, and improving work flexibility, while maintaining high accuracy in identifying marker positions even in areas unsuitable for GPS reception.
Implementation Method 1
by using a work apparatus including a magnetic sensor capable of detecting magnetism, the laid magnetic markers are detected
Data Source
AI summary
In an installation method for laying magnetic markers (10) in a road for driving assist control on a vehicle side, a laying work vehicle (2) sequentially lays the magnetic markers (10) while moving along the road without performing a prior survey or the like of laying positions, and then by using a positioning work vehicle (3) including a magnetic sensor capable of detecting magnetism, the laid magnetic markers (10) are detected and the laying positions are identified to generate position data regarding the magnetic markers (10), thereby allowing reduction of cost of laying the magnetic markers (10).