Rail Vehicle Locating Device Self-Calibration via Vibration Backscattering
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Solution Overview
Problem
Existing methods for locating rail vehicles using waveguides and electromagnetic pulses lack reliable fault detection mechanisms for the locating device, making it difficult to ensure accurate and continuous operation.
Innovation Solution
A method that activates a vibration device at a known position along the rail line to generate backscattering of electromagnetic pulses, allowing for the measurement of a time period that indicates the functioning of the locating device, with error signals generated if the time period exceeds predetermined limits, and using this information to calibrate or correct location signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no vibration device is used for fault detection, then the locating device operates continuously, but the reliability of the locating device cannot be verified
Solution Approach 1:
The patent applies multi-functionality by enabling existing track system components (switches, barriers, semaphore signals) to serve dual purposes: their original track control functions and additional vibration generation functions for fault detection. This eliminates the need for dedicated vibration generation devices while achieving reliable fault detection capability.
Solution Approach 2:
The locating device performs self-diagnosis by using vibrations from regularly adjusted track components to automatically detect faults in its own operation. The system monitors itself without requiring external testing equipment or additional complex infrastructure, achieving self-service fault detection.
2Reliability
If additional equipment is added for fault detection, then the reliability of the locating device is improved, but the cost and complexity increase
Solution Approach 1:
The patent reuses existing track system infrastructure (switches, barriers, semaphore signals) for dual purposes: original track control and vibration generation for fault detection. This eliminates the need for additional expensive equipment while achieving reliable functioning checks.
Solution Approach 2:
The system uses already-present track components to perform self-diagnosis, eliminating the need for separate testing equipment. The locating device monitors its own health using vibrations from regularly adjusted existing components, reducing overall system cost.
3Measurement precision
If the locating device is not calibrated, then the system operates without maintenance, but the location precision deteriorates
Solution Approach 1:
The patent uses regularly adjusted track components to generate vibrations before actual locating operations, enabling proactive calibration of the system. This preliminary calibration action ensures location precision is maintained without disrupting normal operations, as the calibration data is collected and processed in advance.
Solution Approach 2:
The system implements continuous feedback by measuring vibration backscattering patterns and comparing them against expected values. When deviations are detected, the system automatically adjusts calibration parameters to maintain location precision, ensuring operational efficiency is not compromised by manual calibration interventions.
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
Enables regular and cost-effective checking of the locating device's functionality, allowing for accurate rail vehicle location with minimal additional equipment, and provides a correction value to improve location precision.
Implementation Method 1
a vibration device located at a known position in the area of the rail line is activated at a predetermined activation time and a vibration causing backscattering of the electromagnetic pulse is thereby generated at the known position
Implementation Method 2
Electromagnetic pulses are fed into the waveguide one after the other. At least one backscatter pattern generated by vehicle-induced backscattering of the electromagnetic pulse is received and evaluated
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a method for operating a locating device (10), which comprises a waveguide (50) laid along a track segment (100) in order to locate a rail vehicle (110) on the track segment (100), wherein in the method, electromagnetic pulses (Pin) are fed into the waveguide (50) in succession and backscattering patterns (Rm, Rm') produced by backscattering of the electromagnetic pulse (Pin) are received and evaluated for each emitted pulse (Pin). According to the invention, a vibration device (70) located in the area of the track segment (100) at a known position is activated at a predefined activation time and a vibration (Me) causing backscattering of the electromagnetic pulse (Pin) is thereby produced at the known position, the duration between the activation time and the receipt of the backscattering pattern (Rme) indicating the vibration is measured, and the measured duration is used to check the functionality of the locating device (10) or to calibrate the locating device (10).