Back on a speed sensor (should this kick over to a different thread?), has anyone tried using the Ultrasonics in order to get Doppler effect? I plan on testing this this weekend, but if someone has already got some results to get us headed in the right direction, it would be great.
My thought is that if you use the Ultrasonic distance measuring sensors at an angle, they should measure different distance values for different speeds (doppler effect). What I hope my tests will show is whether or not there is enough range and resolution to get a decent speed measurement.
Addition:
Found this paper describing the physics and moth and testing results from someone elses experimentation.
http://cigr-ejournal.tamu.edu/submis...2001%20007.pdf