Vehicular Tag Communication Triggered by Magnetic Markers
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Solution Overview
Problem
The existing vehicular navigation systems using wireless tags face instability in communication due to mutual interference and crosstalk of electric waves, leading to unreliable data transmission during vehicle travel.
Innovation Solution
The vehicular system sets a communication start point based on the detection of a magnetic marker, immediately terminating the communication process upon acquiring tag information, which reduces the transmission period and frequency of electric waves, thereby minimizing interference and enhancing communication reliability between the wireless tag and the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmission frequency or power of electric waves is increased to improve communication reliability with the wireless tag, then communication reliability is improved, but mutual interference and crosstalk of electric waves occur, making communication unstable
Solution Approach 1:
The system uses periodic magnetic markers embedded in the road to trigger communication at specific intervals. The communication control unit activates the wireless communication part only when a magnetic marker is detected, creating a periodic transmission pattern that avoids continuous interference while maintaining reliable communication at critical moments.
Solution Approach 2:
The system detects magnetic markers in advance to determine the optimal timing for communication. By using the magnetic marker detection as a preliminary trigger, the system prepares and initiates communication at the precise moment when the vehicle is in the optimal position relative to the wireless tag, improving reliability without requiring increased transmission power.
2Loss of information
If the communication process continues for a longer period to ensure complete data transmission, then data completeness is improved, but the transmission period increases, leading to more interference and crosstalk
Solution Approach 1:
The communication control unit monitors the communication process in real-time and terminates it immediately upon successful acquisition of tag information. This feedback mechanism ensures that communication lasts only as long as necessary to complete data transmission, preventing unnecessary extensions that would increase interference while guaranteeing data completeness.
Solution Approach 2:
The system rapidly completes the communication process as soon as the required tag information is acquired, immediately terminating the transmission. This approach rushes through the necessary data exchange without unnecessary delays, minimizing the transmission period and reducing the opportunity for interference while ensuring complete data acquisition.
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
This approach improves the reliability of communication between the wireless tag and the vehicle by shortening the transmission period, reducing wave interference, and minimizing the risk of missing tag information, while also simplifying the control unit's processing requirements and reducing hardware costs.
Implementation Method 1
a magnetic marker detecting part that detects the magnetic marker
Data Source
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AI summary
A vehicular system (1) detects a magnetic marker (10) laid in a road and wirelessly communicates with a wireless tag (15) attached to the magnetic marker (10). The system includes a measuring unit (2) which detects the magnetic marker (10) by sensing magnetism, a tag reader (34) which executes a communication process with the wireless tag (15), and a control unit (32) which sets a communication start point as a start point of the communication process by the tag reader (34) . The control unit (32) sets, as a communication start point, a time after a lapse of specified time with reference to a time point of detection at which the measuring unit (2) detects the magnetic marker (10). Upon reading information from the wireless tag (15), the tag reader (34) terminates communication, thereby shortening a communication time.