Embedded RFID Magnetic Road Marker for Richer Vehicle Guidance
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Solution Overview
Problem
Conventional magnetic markers on roads provide limited information to vehicles, mainly indicating presence, polarity, and lateral shift, which is insufficient for advanced driving assistance and automatic driving applications.
Innovation Solution
A sheet-shaped magnetic marker integrated with a magnet sheet and a wireless RFID tag that outputs additional information via wireless communication, with the RFID tag either entirely or partially accommodated within the magnet sheet, enhancing data transmission and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a magnetic marker only uses magnetic properties for detection, then the structure remains simple, but the amount and type of information provided to vehicles is insufficient
Solution Approach 1:
The patent combines a wireless tag (RFID or similar) with the magnetic marker structure. The wireless tag is integrated into the magnetic marker, allowing it to store and transmit additional information such as road rules, speed limits, and other data relevant to vehicle control, thereby significantly enhancing the information provision capability without requiring a completely separate system.
Solution Approach 2:
The magnetic marker is designed to serve multiple functions: it provides magnetic detection for vehicle positioning, stores information in the wireless tag, and transmits various types of data (road rules, speed limits, etc.) to vehicles. This multi-functionality allows a single device to replace what would otherwise require multiple separate systems.
2Reliability
If the wireless tag is affixed to the outer surface of the magnet sheet, then the manufacturing process is simple, but the durability of the wireless tag is reduced
Solution Approach 1:
The wireless tag is embedded within the magnetic sheet structure, with the magnetic sheet forming a protective enclosure around the tag. This nesting approach protects the wireless tag from environmental factors and physical damage while maintaining integration with the magnetic marker system.
Solution Approach 2:
The magnetic sheet acts as a protective shell or enclosure for the wireless tag. The sheet provides mechanical protection and environmental shielding while maintaining the overall flexibility and thin-profile design of the magnetic marker, allowing the tag to be protected without significantly increasing the overall size.
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 magnetic marker provides more comprehensive information to vehicles, improving driving assistance and automatic driving capabilities while maintaining reliability and durability through the integration of the RFID tag within the magnet sheet.
Implementation Method 1
a magnet sheet as a magnetism generation source
Implementation Method 2
a wireless tag which outputs information via wireless communication to the vehicle side
Data Source
AI summary
A sheet-shaped magnetic marker to be laid on a road surface so as to be able to be detected by a magnetic sensor attached to a vehicle to achieve assist for driving operation of the vehicle by a driver or control on a vehicle side to achieve automatic driving independently from operation of the driver has a magnet sheet (11) as a magnetism generation source and a wireless tag (2) which outputs information via wireless communication to the vehicle side. In the magnetic marker, the wireless tag (2) is interposed between a sheet (11A) and a sheet (11B) configuring the magnet sheet (11), and the entire wireless tag (2) is accommodated inside the magnet sheet (11).