Hi,
I need to measure the rotation speed of a spoked wheel.
As an alternative to a suitable sensor + arduino, I was considering using a webcam placed very close to the wheel and counting the frequency at which the spokes pass in front of the webcam.
Has any of you tried anything similar? Do you have any suggestions?
My naïf idea is that if a (natural or artificial) source of light is placed in front of the webcam, when the spoke passes in front of it, it will reduce considerably the brightness of the whole frame or of a big portion of it.
I'm looking for something simple: if this eventually leads to a complicated artificial vision task, or if a good calibration is difficult to achieve, then I would rather go for a tachometer and an arduino...
Thanks in advance m.