Ground Device Magnetic Recognition for Vehicle Data Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing data transmission systems between vehicles and ground devices often pollute the electromagnetic environment and generate false commands due to unnecessary emissions, especially when vehicles are not present, leading to safety concerns.
Innovation Solution
A method utilizing a magnetic recognition phase where a ground device detects disturbances in a magnetic field induced by a vehicle's passage, comparing these disturbances to a stored magnetic signature curve to generate a recognition signal only if they match expected criteria, thereby authorizing synchronized data exchanges between the vehicle's on-board and ground devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fixed system emits signals permanently or whenever a vehicle is detected by inductance modification, then data transmission can be established with vehicles, but electromagnetic pollution increases and false commands may be generated when vehicles are not present or cannot recognize the signal
Solution Approach 1:
The system performs preliminary magnetic field sampling and analysis before emitting recognition signals. The ground device samples the magnetic field in advance, analyzes whether a vehicle is truly present and recognizable, and only then proceeds to emit signals for data transmission. This preliminary action prevents unnecessary electromagnetic emissions and false commands.
Solution Approach 2:
The patent replaces simple inductance-based detection with magnetic field sampling and analysis using Hall sensors or magnetoresistive sensors. This substitution enables more accurate vehicle recognition by analyzing magnetic field variations patterns, reducing false detections and unnecessary signal emissions that cause electromagnetic pollution.
2Object-generated harmful factors
If magnetic field sampling and analysis is performed before signal emission, then electromagnetic pollution is reduced and false commands are minimized, but system complexity increases
Solution Approach 1:
The detection process is segmented into distinct phases: magnetic field sampling phase, analysis phase, and signal emission phase. This segmentation allows the system to perform complex magnetic field analysis only when necessary, reducing overall computational burden and system complexity while still preventing electromagnetic pollution effectively.
Solution Approach 2:
The patent introduces an intermediary analysis step between vehicle detection and signal emission. The ground device acts as an intermediary that validates vehicle presence through magnetic field pattern recognition before initiating communication. This intermediary layer reduces unnecessary emissions without requiring the entire system to be complex, as only the ground device needs enhanced detection capabilities.
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 reduces electromagnetic pollution and ensures safe, precise data exchange only with recognized vehicles, minimizing interference and false commands, thus enhancing safety and efficiency.
Implementation Method 1
detects by sampling a disturbance or variation of a magnetic field to which said fixed antenna is sensitive, induced during the passage of a vehicle in the vicinity of this fixed antenna
Implementation Method 2
a fixed antenna which is a metal loop antenna connected to the ground device and powered by this latter so as to generate a magnetic field which can be disturbed during the passage of a vehicle
Implementation Method 3
the fixed antenna may comprise a Hall-effect or magnetoresistive magnetic sensor, the electronic device on the ground detecting the disturbance or variation of a signal delivered by this sensor
Implementation Method 4
the fixed antenna may comprise a Hall-effect or magnetoresistive magnetic sensor
Data Source
Figure 1
Figure 2~3
Figure 4a~4e
AI summary
A method and device for transmitting data between a vehicle provided with an on-board electronic device (15) comprising a circuit for transmitting/receiving signals provided with an on-board antenna and an electronic device on the ground (8) comprising a circuit for transmitting/receiving signals and at least one fixed antenna (5) placed on a track (2). The electronic device on the ground (8) detects a disturbance in a magnetic field to which said fixed antenna is sensitive, when a vehicle passes in the vicinity of this fixed antenna. The electronic device on the ground (8) compares said disturbance with at least one stored decision criterion. The electronic device on the ground (8) authorises and synchronises data exchanges between the circuits for transmitting/receiving signals of the on-board electronic device and the electronic device on the ground, if said disturbance corresponds to said decision criterion, via the onboard antenna and the fixed antenna.