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'[PICLIST] [OT] Embedded Thermal sensing'
2002\05\09@190157 by Dave King

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Hi

Just wondering if anyone knows a good reference on designing an embedded
temp system.
I need to accurately measure temps in a composite aircraft structure. I'll
need to be able to take around 16-64 temps from various embedded sensors. So
I'm trying to figure out how to do this light, cheap and accurate. Once its
closed up I won't have access to it without a chainsaw.;-]

What I'm looking at is getting the temps in cores and the cooling rates when
the structures are exposed to air movement. I think I'll actually need two
types of measurements, one would be temps from the entire series of probes
on a fairly rapid basis 10Hz for about 10-15 minutes worth of data and then
another series where the time might be a few minutes between readings. This
is the easy part.

The hard part is making it accurate and getting it right before its embedded
into the structure.

Back to the search engines.

Dave

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2002\05\09@194811 by Uri Sabadosh

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Check out http://www.luxtron.com.

Uri

----- Original Message -----
From: "Dave King" <spam_OUTkingdwsTakeThisOuTspamSHAW.CA>
To: <.....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU>
Sent: Thursday, May 09, 2002 3:56 PM
Subject: [OT] Embedded Thermal sensing


> Hi
>
> Just wondering if anyone knows a good reference on designing an embedded
> temp system.
> I need to accurately measure temps in a composite aircraft structure. I'll
> need to be able to take around 16-64 temps from various embedded sensors.
So
> I'm trying to figure out how to do this light, cheap and accurate. Once
its
> closed up I won't have access to it without a chainsaw.;-]
>
> What I'm looking at is getting the temps in cores and the cooling rates
when
> the structures are exposed to air movement. I think I'll actually need two
> types of measurements, one would be temps from the entire series of probes
> on a fairly rapid basis 10Hz for about 10-15 minutes worth of data and
then
> another series where the time might be a few minutes between readings.
This
> is the easy part.
>
> The hard part is making it accurate and getting it right before its
embedded
{Quote hidden}

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2002\05\09@220809 by Spehro Pefhany

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At 03:56 PM 5/9/02 -0700, you wrote:


>I need to accurately measure temps in a composite aircraft structure. I'll
>need to be able to take around 16-64 temps from various embedded sensors. So
>I'm trying to figure out how to do this light, cheap and accurate. Once its
>closed up I won't have access to it without a chainsaw.;-]

Suggest AWG30 Kapton-insulated thermocouples for the sensors. The rest is
just instrumentation design.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speffspamKILLspaminterlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
9/11 United we Stand

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