Specialist Train Camera

TonyM

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Dash Cam
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Not really a dashcam (hence off-topic) but interesting anyway.

Cameras strapped to trains help Network Rail fix tracks in record time
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Five monitoring trains equipped with Plain Line Pattern Recognition (PLPR) have been launched as part of Network Rail’s ”predict and prevent” strategy. PLPR uses cameras mounted under trains to identify track defects, alerting Network Rail engineers to where repairs are needed. The system monitors and records track condition information, and can spot problems such as missing fasteners, excess ballast and ineffective rail clamps. Image analysis software uses an algorithm to compare what the cameras see with an image of how the track should look.

The New Measurement Train (NMT), affectionately known as the Flying Banana, covers 115,000 miles in a year.

Cameras under the trains capture an image every 0.8mm, taking 70,000 images per second, creating around 10TB of image data every 440 miles. I estimate that to be a data rate of 2.8TB/hour = 6600Mb/s!

Each Plain Line Pattern Recognition image file, recorded by seven cameras on the NMT, is 2048 pixels wide and 30 miles long.

New-Measurement-Train-NMT.jpg


In total, the NMT is equipped with a track geometry system, laser track scanners, a high-resolution video camera, unattended geometry measurement system, and overhead line inspection systems. These are in addition to the PLPR system and a radio survey system which check coverage for the GSM-R communication system.
 
In the late 80ties us apprentices from the Danish railroads was on a week long trip to France, among other things to see their high speed trains.
We saw some footage of the wheels recorded during testing, and pretty hairy to see wheel lift at 300 KM/h
But that was just early testing, now they go much faster and have the track for it, you can find a video on youtube where they do almost 600 km/h with no problems, it even have wheel camera too.

I got drunk on the train between Paris and Lyon doing 280 km/h, fastest i have ever moved on the ground.
 
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