On Thursday 01 September 2005 04:03 pm, gacrowell@micron.com scribbled:
> Well, before Olin clipped my post for the humor value, I'd suggested a
> wheel sensor (without realizing the original poster was looking for a
> stand-alone installation), or some sort of ground motion sensor.  I have
> no idea what that sensor might be, other than perhaps some variation on
> an ultrasonic flowmeter.
>
> Gary

Not a bad thought -- he could use somthing like a pitot tube (that measures 
airspeed) on an airplane.  It compares ram pressure (air being forced into 
the tube), against static pressure and determines airspeed.  There are other 
factors (such as density altitude), but this could probably be a non-factor 
here for this non-precision app.

Cheers,
-Neil.



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