3 ms·
There are a million approaches to this. Minority of the solutions are CV. Most are already solved engineering problems. Elevators manage to not drag you, but m
by JAlexoid 7y ago
There are a million approaches to this. Minority of the solutions are CV. Most are already solved engineering problems.
Elevators manage to not drag you, but multimillion dollar train cars can't?
Your thought process is one of over-engineering. Don't overengineer.
- jrockway 7y agoElevators don't run outdoors at 60 miles an hour in a blizzard. Trains are taken out of service all the time because the door opening/closing machinery has stopped working. A sensor that can detect the sleeve of your shirt caught in the door would have to be more precise than what elevators use, and operate in significantly harsher conditions. (In Japan, platform doors are common. Every installation I've seen has multiple e-stop buttons to press if you get caught in them. Clearly they don't trust the sensors, if there are even sensors. And those doors are static and don't move with the train.)
- avianlyric 7y agoLondon Underground operates in the same conditions and have figured it out, without the emergency stop buttons, or platform side doors. The Victoria line has been operating semi-automatically with driver only operation, and not getting out of the trains (because the windows don’t open) since 1968. These aren’t insurmountable problems, and they’ve been solved for a very long time. https://en.m.wikipedia.org/wiki/London_Underground_1967_Stock https://en.m.wikipedia.org/wiki/London_Underground_1967_Stoc...