Railway Undercarriage Inspection Assemblies for Automated Defect Detection

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Solution Overview

Problem

Traditional train inspections are costly and prone to human error, requiring significant manpower and time, and often miss safety and functionality issues.

Innovation Solution

An inspection portal system comprising undercarriage area-scan and line-scan inspection systems that capture high-resolution images of train undercarriages while in motion, using multiple cameras and lighting arrays secured to train tracks, with air curtains to protect the equipment and reduce blur.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If traditional manual inspections are used, then inspection coverage can be comprehensive, but inspection time and cost increase significantly

Engineering Contradiction:

Improveinspection accuracyVSAvoidinspection time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent replaces manual mechanical inspection systems with an automated image processing system. Multiple cameras capture images of the undercarriage, and computer vision algorithms automatically analyze these images to detect defects, replacing the need for manual visual inspection while maintaining comprehensive coverage and reducing inspection time.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system creates digital copies (images) of the undercarriage surfaces using multiple cameras positioned at different locations. These digital copies are then processed by computer vision algorithms to identify defects, eliminating the need for physical manual inspection while preserving inspection accuracy.

Inventive Principle:

Principle #26Copying

2Reliability

If manual inspections are performed, then flexibility in inspection methodology is maintained, but human error increases and reliability decreases

Engineering Contradiction:

Improveinspection reliabilityVSAvoidinspection system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces human inspectors with an automated system consisting of multiple cameras and computer vision algorithms. This substitution eliminates human error and increases inspection reliability, while the modular camera system maintains manageable complexity through standardized components and processing pipelines.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If inspections are conducted at rail yards, then thorough examination is possible, but train availability decreases due to time lost in railyard

Engineering Contradiction:

Improvetrain availabilityVSAvoidinspection thoroughness

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The system performs inspection actions continuously as the train passes through the portal, capturing images of the undercarriage in real-time. This preliminary action during normal operation eliminates the need to stop the train for inspections, maintaining both productivity and inspection thoroughness through automated image capture and analysis.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The inspection system operates continuously as trains pass through the portal, with cameras constantly capturing images and processors continuously analyzing defects. This continuous inspection action eliminates downtime while maintaining comprehensive examination through uninterrupted monitoring of the undercarriage surfaces.

Inventive Principle:

Principle #20Continuity of useful action

4Measurement precision

If multiple cameras are used to capture undercarriage images, then inspection coverage and resolution improve, but system complexity and cost increase

Engineering Contradiction:

Improveimage resolutionVSAvoidcamera system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The inspection system divides the undercarriage into multiple inspection zones, with each camera positioned to capture specific regions. This segmentation allows high-resolution imaging of critical areas while using a manageable number of cameras, balancing image quality with system complexity. Each camera module is standardized and can be independently configured for its specific inspection zone.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20250326411A1Undercarriage inspection assemblies systems

Publication Date: 2025.10.23 NORFOLK SOUTHERN CORP

AI summary

Assemblies, systems, and methods for inspecting vehicles are disclosed. An assembly can comprise one or more cameras, one or more light sources s, and a housing configured to attach to a railway. The one or more cameras can be configured to capture images in a generally vertical direction and can be located below a top surface of one or more ties of a railway when the inspection assembly is attached to the railway. The housing can comprise a base a base configured to at least partially support the one or more cameras and the one or more light sources and a shroud sloped downwardly in a direction extending away from the one or more cameras.