Vasile Surducan wrote:
> The problem which requires to be solved its a small distance
> measurement at high speed (about 15cm/second) in a high EM radiation
> environement (near a few KW generated from 300KHz inductors). The
> medium distance to be measured is about 2mm, between a a metal
> surface which have inflexions (it's not a plane surface) and a moving
> tool. The metal surface is painted, dirty and gruffly, where the
> paint+dirt have a variable thickness.
> The generators can't be shutted off while the measurement is
> performed.
> I will be glad to hear any possible ideea from specialists (or just
> thinkers) from these lists.

How about shining a thin light beam at an angle and using parallax from
another sensor to measure distance?

Are mechanical means out of the question, like an idler wheel on a spring
loaded lever, then measure the deflection of the lever?


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