Method for ascertaining a wheel diameter of a rail vehicle

The automatic method for measuring wheel diameters in rail vehicles addresses the limitations of manual methods by using tachometers and wheel revolution measurements, resulting in improved accuracy and reduced costs, thereby enhancing safety and operational efficiency.

WO2025114012A1PCT designated stage expired Publication Date: 2025-06-05SIEMENS MOBILITY GMBH
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Patent Information

Application Number
PCT/EP2024/082282
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-11-29
Filing Date
2024-11-14
Publication Date
2025-06-05

AI Technical Summary

Technical Problem

Current methods for measuring wheel diameters in rail vehicles are manual, prone to errors, and costly, which can compromise the accuracy of speed calculations and safety-critical functions.

Method used

A method that automatically detects the wheel diameter by measuring the number of wheel revolutions along a known section and using tachometers to calculate the wheel diameter, eliminating the need for manual input.

Benefits of technology

This method provides highly accurate and reliable wheel diameter measurements, reducing maintenance and operational costs, and enhancing the safety and accuracy of speed calculations.

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Abstract

The invention relates to a method for ascertaining a wheel diameter of a rail vehicle (SFZ). The rail vehicle (SFZ) travels along a measurement track (MS) of known length. A start (BMS) and an end (EMS) of the measurement track (MS) are identified by the rail vehicle (SFZ). From the identified start (BMS) of the measurement track (MS), a number of revolutions of a wheel of the rail vehicle (SFZ) is measured by the rail vehicle (SFZ). The measurement of the number of revolutions of the wheel is ended as soon as the end (EMS) of the measurement track (MS) has been identified by the rail vehicle (SFZ). The diameter of the wheel is automatedly calculated by the rail vehicle (SFZ) from the measured number of revolutions of the wheel along the measurement track and the known length of the measurement track.
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Citation Information

Patent Citations

  • Method of wheel calibration

    US11332172B2

  • Dynamic wheel diameter determination system and method

    WO2015071783A1