Ground Balise Data Transmission with Overvoltage Protection
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Solution Overview
Problem
Existing ground balises face challenges in reliably transmitting authentic and valid data to Automatic Train Protection (ATP) onboard equipment, which is crucial for safe train operation.
Innovation Solution
The method involves a fixed or switchable ground balise that receives updating data, modifies it, and uses Frequency Shift Keying (FSK) modulation to send the data to onboard equipment via a carrier frequency signal, with amplitude limitation and overvoltage protection to ensure accurate and safe transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the ground balise transmits data using electromagnetic energy from onboard equipment, then the balise can operate without external power supply, but the transmission reliability may be affected by energy fluctuation
Solution Approach 1:
The patent introduces overvoltage protection circuits and amplitude limitation circuits that activate when voltage exceeds safe thresholds. These protective mechanisms are pre-configured to cushion against energy fluctuations from the onboard equipment's electromagnetic signals, preventing damage to the balise circuitry while maintaining reliable data transmission.
2Reliability
If the balise modifies vehicle running control data in real-time, then the data remains authentic and valid, but the processing complexity increases
Solution Approach 1:
The ground balise autonomously modifies vehicle running control data using pre-stored modification rules and algorithms. The system self-services by automatically validating, modifying, and transmitting data without requiring external verification, thereby ensuring data authenticity while managing processing complexity through built-in intelligence.
3Reliability
If amplitude limitation and overvoltage protection circuits are added, then the balise is protected from voltage damage, but the device structure becomes more complex
Solution Approach 1:
The amplitude limitation circuit and overvoltage protection circuit are merged into a single integrated protective module within the ground balise. This consolidation combines multiple protection functions into one unified structure, reducing overall complexity while maintaining comprehensive protection against voltage fluctuations and electromagnetic interference.
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 ensures reliable and effective data transmission to ATP onboard equipment, enhancing train safety by providing accurate and authentic vehicle running control data.
Implementation Method 1
Converting energy of the carrier frequency signal into a working power of the ground balise
Implementation Method 2
Carrying out Frequency Shift Keying (FSK) modulation on the vehicle running control data by a modulation unit to obtain the modulated vehicle running control data
Data Source
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Figure 2
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AI summary
The present disclosure provides a method for transmitting data by using a fixed ground balise (500) or an switchable ground balise (600), which can meet requirements of onboard equipment and accurately send effective data information and can more effectively ensure running safety of a vehicle. The present disclosure further provides a fixed ground balise (500) or a switchable ground balise (600).