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From: Ian Stirling
Subject: Re: non-contact temperature measurement
Date: Mon, 16 Sep 2002 23:06:23 +0000 (UTC)
NNTP-Posting-Date: Mon, 16 Sep 2002 23:06:23 +0000 (UTC)
User-Agent: tin/1.5.6-20000803 ("Dust") (UNIX) (Linux/2.4.18 (i686))
Bill E. L. wrote:
> monitor the temperature to investigate further.
> I do monitor the current and voltage through the sample (hence resistance)
> with the current setup..... but the mechys (mechanical engineers) want more
> info :)
Sorry for lateness.
If you take a wire, with two connections to the middle of the wire, then
you could try heating the middle of the wire only.
If you then use the ends of the wire to make a four terminal measurement,
you've got exact resistance of the heated segment.
A seperate four-terminal arrangement at the ends of the wire gives the
This gives you a section of wire at the ends that'll act like a strain
You can now strain it at various levels, and see what it does to the
resistance of the heated and unheated segments.
Heating the normally heated section with ducted hot air would let you
measure temperature coefficiant under various strains.
http://inquisitor.i.am/ | mailto:email@example.com | Ian Stirling.
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