Road Magnetic Marker Covering for Stable RFID Communication
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Solution Overview
Problem
Magnetic markers used for vehicle navigation and control face instability in wireless communication due to water interference, particularly in rainy conditions, which attenuates electromagnetic waves and impairs communication reliability.
Innovation Solution
Incorporating a protective cover that isolates the antenna from water, ensuring reliable wireless communication by maintaining a sufficient isolation distance between the antenna and water, even when the marker is submerged.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the magnetic marker uses wireless communication (RFID tag) to provide more information to the vehicle side, then the amount of information provided increases, but the stability of wireless communication deteriorates when water is present due to electromagnetic wave attenuation
Solution Approach 1:
The patent introduces a protective cover as an intermediary element between the antenna and water. This cover is made of dielectric material that allows electromagnetic waves to pass through while physically blocking water from contacting the antenna, thus mediating between the need for wireless communication and the need for water protection
Solution Approach 2:
The protective cover is implemented as a thin-walled dielectric structure that encloses the antenna. This shell-like structure provides electromagnetic transparency while offering physical protection against water, enabling the antenna to maintain communication functionality while being isolated from harmful environmental factors
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 with a protective cover ensures stable wireless communication by preventing water from reaching the antenna, thus maintaining high communication performance even in wet environments.
Implementation Method 1
stability of the wireless communication may be impaired due to influences of water exhibiting electromagnetic characteristics that attenuate electric waves
Data Source
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AI summary
A magnetic marker (1) to be laid in or on a road to achieve driving support control such as lane departure warning for warning departure of a vehicle from a lane and so forth, is a magnetic marker in which an RFID tag (2) having an antenna for transmitting or receiving electric waves for wireless communication is retained in a magnet (10) forming a magnetism generation source. The magnetic marker further includes a protective cover (4) which prevents proximity of water to the antenna of the RFID tag (2) and isolates the antenna from water. Thus, more information can be stably provided to a vehicle side.