Magnetic Marker Positioning Workflow Without Pre-Survey Layout
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Solution Overview
Problem
Conventional magnetic marker systems require many markers to be laid at short spacings with high positional accuracy, making cost reduction difficult.
Innovation Solution
A magnetic marker installation method and work system that uses inertial navigation calculation to estimate relative positions, allowing for efficient laying without high-accuracy surveys, and includes a positioning work vehicle with magnetic sensors and GPS for accurate position data generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic markers are laid at short spacings with high positional accuracy, then driving assist functions (lane departure warning, automatic steering) can be achieved, but installation cost increases
Solution Approach 1:
Instead of laying markers at precisely predetermined positions through high-accuracy surveying, the invention inverts the approach by laying markers at arbitrary positions and subsequently identifying their actual positions through detection. This reverses the traditional workflow from precision laying to post-laying identification, thereby reducing installation costs while maintaining system reliability
Solution Approach 2:
The invention changes the parameter of positional accuracy requirement from the laying stage to the identification stage. By using detection apparatus to identify actual marker positions after laying, the system transforms the accuracy requirement from a mechanical laying parameter to a detection parameter, allowing flexible laying while ensuring accurate position data for driving assist functions
2Manufacturing precision
If high-accuracy survey is performed before laying magnetic markers, then positional accuracy of markers is improved, but installation time and cost increase
Solution Approach 1:
The invention performs position identification as a preliminary action that can be conducted after marker laying rather than requiring pre-surveying. By using detection apparatus to identify marker positions in the actual installation environment, the system eliminates time-consuming high-accuracy surveying while ensuring positions are accurately recorded for subsequent use
Solution Approach 2:
The invention replaces the mechanical surveying system with a detection-based identification system. Instead of using surveying equipment to predetermined marker positions before laying, the system uses detection apparatus to identify marker positions after laying, substituting mechanical precision laying with automated detection and identification
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
Reduces the cost of laying magnetic markers by eliminating the need for high-accuracy surveys and enabling efficient identification of marker positions, even in areas unsuitable for GPS reception, such as tunnels.
Implementation Method 1
a marker detection system for vehicles for detecting magnetic markers laid in a road by a magnetic sensor attached to a vehicle
Implementation Method 2
a positioning means which is mounted on the working vehicle and which positions the marker as an absolute position
Implementation Method 3
it is not required to lay the magnetic markers with high accuracy at predetermined positions defined by design or the like
Data Source
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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).