Train Inspection Camera Lens Protection and LED Cycling
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Solution Overview
Problem
High-speed train inspection portals face challenges in capturing high-resolution images due to airborne contaminants and excessive ambient light, which result in low-quality images due to smudges on camera lenses and shadowing effects.
Innovation Solution
The use of line scan cameras mounted on trusses with clear lens caps and duckbill plates to protect against contaminants, combined with strategically positioned LED lights that cycle on and off to provide focused illumination, ensuring high-resolution image capture from multiple angles without excessive light interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cameras are exposed to capture images of the moving train, then image capture capability is improved, but image quality deteriorates due to airborne contaminants and ambient light interference
Solution Approach 1:
A clear lens cap is placed over the camera lens to protect it from airborne contaminants while still allowing light to pass through for image capture. The lens cap acts as an intermediary barrier that filters out dust and debris before they can contact the lens surface, thereby maintaining image quality while preserving the camera's operational capability.
Solution Approach 2:
Duckbill plates are mounted on the sides of the camera to block ambient light from entering the camera housing. These plates extract or remove the harmful ambient light interference from the camera's field of view, allowing the camera to capture images without the distortion caused by stray light while maintaining its image capture function.
2Illumination intensity
If LED lights are activated to illuminate the train, then illumination intensity is improved, but heat generation increases
Solution Approach 1:
The LED lights are activated in cycles rather than continuously - they turn on when the train approaches the portal and turn off after the train passes through. This periodic operation allows the lights to provide intense illumination when needed for image capture while reducing cumulative heat generation by allowing cooling periods between activations.
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 setup enables high-quality, high-resolution imaging of trains from all sides and angles, reducing the impact of debris and ambient light, resulting in improved image clarity and structural integrity assessments.
Implementation Method 1
A plurality of LED lights that surround the camera placement will activate once the train approaches the portal. A principal advantage of LED lights is the intensity of the light that will be produced quickly.
Implementation Method 2
a clear lens cap is placed over the camera lens and helps to direct the line of sight for the camera lens while at the same time to protect the lens from the inevitable dirt and airborne contaminants
Implementation Method 3
a pair of blinders (referred to a duckbills in the industry) are mounted on the side(s) of the camera to reduce the interference of the inevitable airborne contaminants that will be present in the field. The blinders will block most of the airborne contaminants as well as any ambient light that may negatively impact the image that is produced.
Implementation Method 4
A disadvantage to LED light is the intense heat that is generated by this type of lighting
Data Source
AI summary
Trains that pass through an inspection portal must be analyzed for structural integrity through the capture of high-resolution images of the train, the train cars and the associated parts of the train car (hoses, knuckles and wheels for example). A directed source of light using the correct camera placement and lighting for the cameras is provided to ensure that the images are the highest resolution possible with the environmental factors that are present. With the clear images that are provided the images are formed to provide an analysis of the integrity of the train.