On Wed, 3 Dec 2003, Mike Harrison wrote:

> On Wed, 3 Dec 2003 16:09:36 +0200, you wrote:
>
> >Hi there,
> >
> >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.
> >
> >thank you in advance,
> >
> >Vasile
> >http://surducan.netfirms.com
>
> What resolution/range do you need ?

  10% to 20% will be ok

> Do you want to measure the distance to the paint/dirt, or to the metal surface regardless of
> contamination ?

  distance to the metal surface

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