Simple / Cheap object recognition?
September 19, 2012
I'm not sure if "object recognition" is the correct phrase for this, as that has connotation of computer vision etc but what I am after in theory is far more simple.
Basically I have a train set. The trains go along the track. Currently I have 3 trains, but I could get more in future. I guess 8 would be a practical limit.
Currently I can quite easily detect when a train goes down a particular piece of track by having a simple IR sensor mounted trackside - this then sends a signal to my microcontroller which acts accordingly changing lights or whatever.
Now, what I am looking for is a simple / cheap way of detecting which train has just passed the sensor?
At this stage I am thinking of having a passive componant on the train, and active componant on the track-side. This is simply so I can easily run wires from the track-side equipment back to my microcontroller. However this may change if I decide I would like more track-side sensor stations, but that would involve some telemetry equipment on the trains.
Does anybody have any ideas?