Single-Sensor Wheel-Track Discontinuity Detection for Railway Wear
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Solution Overview
Problem
Existing methods for monitoring wear in railway track components, particularly switches and crossings, are inefficient, costly, and require significant personnel and maintenance, often leading to late detection of critical conditions and disruptions in rail operations.
Innovation Solution
A method using a single sensor to detect the temporal course of mechanical-dynamic stress on the track component, identifying local extrema that correspond to known reference features, allowing precise determination of discontinuities in wheel-track contact, independent of vehicle speed and weight, and enabling early detection of wear and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors are used to monitor track component wear, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts only the essential measurement function needed for wear detection, using a single sensor to capture the critical mechanical-dynamic stress signal. By removing unnecessary sensors and focusing on the most relevant parameter (mechanical-dynamic stress temporal course), the system achieves wear detection accuracy without the complexity of synchronizing multiple sensors.
Solution Approach 2:
The patent replaces complex mechanical sensor arrays with a simplified mechanical-dynamic stress measurement approach. By using a single sensor to detect the temporal course of mechanical-dynamic stress and analyzing local extrema patterns, the system substitutes the need for multiple synchronized sensors while maintaining measurement precision.
2Reliability
If stationary sensor arrays are deployed to continuously monitor wear, then reliability of continuous monitoring is improved, but ease of operation deteriorates due to maintenance effort
Solution Approach 1:
The patent enables the monitoring system to serve itself by using the existing mechanical-dynamic stress signals during normal train operations to continuously assess wear. The single sensor captures data during regular train passage, and the evaluation of local extrema patterns provides continuous monitoring without requiring additional infrastructure or frequent maintenance interventions.
3Ease of manufacture
If manual visual inspections are performed regularly, then ease of manufacture is improved, but productivity deteriorates due to high personnel costs and time expenditure
Solution Approach 1:
The patent replaces manual visual inspection with an automated mechanical-dynamic stress measurement system. A single sensor automatically captures the temporal course of stress during train operations, and signal processing algorithms evaluate local extrema patterns to detect wear. This substitution eliminates the need for personnel to perform manual inspections while dramatically improving monitoring efficiency through continuous automated assessment.
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 efficient, reliable, and cost-effective monitoring of track component wear with reduced instrumentation and maintenance, providing accurate and timely detection of wear and damage without complex synchronization of multiple sensors.
Implementation Method 1
at least one sensor signal is detected which represents the temporal course of a mechanical-dynamic stress on the track component due to a wheel-track interaction
Data Source
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AI summary
Method for locating at least one discontinuity of a wheel-track contact along a wheel-track contact trajectory when a wheel (11) of a rail vehicle or train passes over one or more track components (1) of a railway track, in which at least one sensor signal is detected which represents the temporal course of a mechanical-dynamic stress on the track component (1) due to a wheel-track interaction in at least one spatial direction, wherein the detected sensor signal has a first and a second local extremum (A, B), which are assigned to known reference features of the railway track, in particular of the track component (1), which are arranged at a spatial distance from one another, and wherein at least one sensor signal corresponding to the first and to the second local extremum (A,B) a third local extremum (C) of the sensor signal occurring at a time interval is determined as the discontinuity of the wheel-track contact and the position of the discontinuity is determined according to the time interval of the local extrema (A, B, C) and preferably based on the known local distance of the reference features.