Vehicle Position Detection via Coil Array and Magnetic Mark Segmentation
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Solution Overview
Problem
Existing moving vehicle position detection systems face challenges in continuously detecting vehicles with magnetic marks arranged at intervals, particularly in segments where seamless detection is difficult, such as curves, diverges, and merges, and require precise position detection at specific points like stop positions.
Innovation Solution
A moving vehicle system with a detection head having a coil array and magnetic marks arranged along the route at a pitch equal to the coil array length, allowing continuous position detection using a single head, with adjustable detection range and precision in segments with varying magnetic mark intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic marks are arranged continuously without gaps, then continuous position detection is achieved, but the system complexity and cost increase due to requiring seamless magnetic mark installation along the entire route
Solution Approach 1:
The route is divided into multiple segments with magnetic marks arranged at intervals rather than continuously. The detection head uses multiple coils to detect magnetic marks at different positions, enabling continuous position detection through segmented magnetic mark placement. This reduces installation complexity while maintaining detection continuity.
Solution Approach 2:
Multiple coils in the detection head act as intermediaries to detect magnetic marks at different positions. When one magnetic mark is not detected, other coils can detect adjacent magnetic marks, ensuring continuous position detection without requiring seamless magnetic mark installation.
2Device complexity
If magnetic marks are arranged at intervals, then installation complexity is reduced, but position detection precision deteriorates in segments with wide intervals
Solution Approach 1:
The detection head dynamically switches between different coils based on the detected magnetic mark position. When a magnetic mark is detected by one coil, the system switches to the next coil to detect the next magnetic mark, maintaining continuous and precise position detection throughout the route.
Solution Approach 2:
The system changes detection parameters (which coil to use) based on the current position and detected magnetic marks. By adjusting which coil is active for detection, the system maintains precision even when magnetic marks are spaced at intervals rather than continuously.
3Device complexity
If a single detection head is used, then device complexity is reduced, but the ability to detect positions in all segments with varying requirements deteriorates
Solution Approach 1:
The single detection head is designed with multiple coils that can detect magnetic marks at different positions and intervals. This multi-functional design allows one detection head to handle various segment requirements (different magnetic mark intervals, different detection ranges) without needing multiple specialized detection heads.
Solution Approach 2:
The detection head extends in the moving direction with multiple coils arranged along the movement path. This spatial arrangement in the movement direction enables the single head to cover multiple detection zones and adapt to different segment requirements without needing multiple heads.
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
Enables continuous position detection without seamless magnetic marks, maintaining precision in both segments with magnetic marks at regular and wider intervals, facilitating efficient detection even in challenging sections like curves and diverges, and allowing for precise position identification at necessary points.
Implementation Method 1
a detection head having a coil array formed by arranging a plurality of coils along a moving direction of the moving vehicle
Data Source
AI summary
A detection head has an array including a plurality of coils. Magnetic marks are arranged in a travel route at a pitch equal to the array length. By interaction between the magnetic marks and the coils, a position of a moving vehicle is determined based on the magnetic marks.