Rail Vehicle Wheel Creep Monitoring for Track Damage Detection

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Solution Overview

Problem

Existing methods for identifying damaged sections of vehicle routes, such as rail tracks, are limited by accuracy issues with cameras and lasers at high speeds, the need for slow movement in ultrasonic inspections, the immobility of wayside devices, and the inefficiency of manual human inspections, which result in prolonged track unavailability and potential errors.

Innovation Solution

A system that monitors wheel creep by determining the velocity difference between a vehicle's moving speed and wheel rotational speed to identify damaged sections, allowing for real-time detection and communication of damage locations to remote systems for further action.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If cameras and lasers are used to inspect tracks at high speeds, then inspection speed is improved, but measurement precision deteriorates

Engineering Contradiction:

Improveinspection speedVSAvoiddamage detection accuracy

Core Design Contradiction:

SpeedVSMeasurement precision

Solution Approach 1:

The patent replaces optical inspection systems (cameras and lasers) with a mechanical sensing system that measures wheel creep through velocity differences. This substitution enables accurate damage detection at high speeds by using mechanical velocity sensors rather than optical systems, resolving the contradiction between inspection speed and measurement precision.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The inspection system uses the rail vehicle's own wheels as the sensing mechanism. By monitoring the velocity difference between the vehicle's moving speed and wheel rotational speed, the system leverages the vehicle's normal operation to perform self-inspection, eliminating the need for separate inspection equipment and maintaining accuracy at operational speeds.

Inventive Principle:

Principle #25Self-service

2Measurement precision

If ultrasonic transducers are used to inspect tracks, then measurement precision is improved, but inspection speed deteriorates

Engineering Contradiction:

Improvedamage detection accuracyVSAvoidinspection speed

Core Design Contradiction:

Measurement precisionVSSpeed

Solution Approach 1:

The patent replaces ultrasonic inspection methods with a mechanical velocity differential measurement system. By measuring the difference between vehicle speed and wheel rotational speed, the system achieves accurate damage detection without requiring the slow movement speeds needed for ultrasonic inspection, thus improving inspection speed while maintaining measurement precision.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If manual inspection by human inspectors is used, then measurement precision is improved, but productivity deteriorates

Engineering Contradiction:

Improvedamage detection accuracyVSAvoidinspection efficiency

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The system performs automated inspection using the rail vehicle's own operational data (velocity and wheel rotation sensors). This eliminates the need for manual human inspection, simultaneously improving productivity by enabling continuous inspection during normal operations while maintaining or enhancing measurement precision through automated velocity differential analysis.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system continuously monitors wheel creep and provides real-time feedback about track conditions. By analyzing velocity differences during normal vehicle operation, the system enables ongoing inspection without interrupting service, dramatically improving productivity compared to manual inspection while maintaining accurate damage detection through continuous feedback monitoring.

Inventive Principle:

Principle #23Feedback

4Measurement precision

If wayside devices are used to inspect tracks, then measurement precision is improved, but device complexity deteriorates

Engineering Contradiction:

Improvedamage detection accuracyVSAvoidnumber of inspection devices

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent makes the rail vehicle serve multiple functions: it performs both transportation and track inspection duties simultaneously. By using the vehicle's existing motion sensors to detect track damage through wheel creep analysis, the system eliminates the need for separate wayside inspection devices, reducing device complexity while maintaining measurement precision.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 the need for concurrent independent track inspection equipment, enables faster identification of damaged sections, and minimizes track unavailability, while reducing the likelihood of errors through automated and simultaneous monitoring of multiple wheels.

Implementation Method 1

determining a velocity difference between a moving speed of the vehicle and a rotational speed of the wheel

Methodology Applied

Scientific EffectVelocity difference measurement:

Data Source

PatentUS9469198B2System and method for identifying damaged sections of a route

Publication Date: 2016.10.18 TRANSPORTATION IP HOLDINGS LLC

AI summary

A method and system for examining velocity differences in a vehicle speed of a vehicle and the angular speed of the axles and/or wheels of the vehicle system traveling along a route to determine if the route is damaged and/or to identify the location of the potentially damaged section of the route. The differences may represent wheel creeps of the vehicle system.