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In short: Why have folks look at the track itself when you can take high resolution video of it from a maintenance subway car, and send it back to the maintenance shops for inspectors to look at? NY MTA's doing it now...
The thing is, NY MTA's system is $500,000! Yikes!
I love the idea, but I think I can do it cheaper. I think I can do it for under $1000 in hardware, and all of it located in Rockville, MD.
A Raspberry Pi 3 is $35. It's 8mp camera ($30) can do 1080p at 30 fps and 720p at 60 fps. Micro Center's 64GB SDXC cards are $18 each. Round up, and get a cheap case (or print it), it can be done for $90 each.
Mount ten of those onto the rail inspection vehicle (where ends are marked A and B), five across (outer rail left of end, inner rail left of end, center, inner rail right of end, out rail right of end), with the two sets pointed inwards to capture all angles. Standard Ethernet cables can connect to a central computer to store the pre-compressed videos, or they can be stored on the Pi's and extracted out.
$90 time 10 is $900. For another $180, mount another two Pi to look at the third rail, and be comprehensive.
Okay, over $1000, but not by much, and it's still much much cheaper than $500K. For $2-3K you cover install labor, a cheap laptop, cables, power (USB 5.25V, 1.5A per Pi!) and probably paying some kid to build the capture software for you. But you get a high resolution virtual inspection of rail, ties, clamps, and third rail. Plus, if it breaks, it's easy to replace by going to Micro Center in Rockville!
In short: Why have folks look at the track itself when you can take high resolution video of it from a maintenance subway car, and send it back to the maintenance shops for inspectors to look at? NY MTA's doing it now...
The thing is, NY MTA's system is $500,000! Yikes!
I love the idea, but I think I can do it cheaper. I think I can do it for under $1000 in hardware, and all of it located in Rockville, MD.
A Raspberry Pi 3 is $35. It's 8mp camera ($30) can do 1080p at 30 fps and 720p at 60 fps. Micro Center's 64GB SDXC cards are $18 each. Round up, and get a cheap case (or print it), it can be done for $90 each.
Mount ten of those onto the rail inspection vehicle (where ends are marked A and B), five across (outer rail left of end, inner rail left of end, center, inner rail right of end, out rail right of end), with the two sets pointed inwards to capture all angles. Standard Ethernet cables can connect to a central computer to store the pre-compressed videos, or they can be stored on the Pi's and extracted out.
$90 time 10 is $900. For another $180, mount another two Pi to look at the third rail, and be comprehensive.
Okay, over $1000, but not by much, and it's still much much cheaper than $500K. For $2-3K you cover install labor, a cheap laptop, cables, power (USB 5.25V, 1.5A per Pi!) and probably paying some kid to build the capture software for you. But you get a high resolution virtual inspection of rail, ties, clamps, and third rail. Plus, if it breaks, it's easy to replace by going to Micro Center in Rockville!