[aprssig] FW: X-Ray vision for the APRS DIY'er
jleekley at execpc.com
jleekley at execpc.com
Tue Apr 26 17:33:30 EDT 2016
So, next time, use the cat instead of the space
heater!
John, WB9SMM
On 26 Apr 2016 at 11:01, Robert Bruninga via
aprssig wrote:
Date sent: Tue, 26 Apr 2016 11:01:29 -0400
To: aprssig at tapr.org
Subject: [aprssig] FW: X-Ray vision for the APRS DIY'er
From: Robert Bruninga via aprssig <aprssig at tapr.org>
Send reply to: Robert Bruninga <bruninga at usna.edu>,
TAPR APRS Mailing List <aprssig at tapr.org>
>
> For your APRS power distribution system in your walls...
>
> I needed to see through a wall to see the studs in a 100 year old
> plaster and lath wall. It was easy. Just put a radiant space
> heater on the other side to heat the wall. Then after an hour or
> so, use an IR camera to view the wall. You can see the studs and
> anything else that is inconsistent inside the wall. Then I
> happened to glance with the IR camera at the wall where I had the
> 1500 W electric heater plugged in, and I could CLEARLY see the hot
> wiring in 3D. By moving the camera around I could see the hot
> wire in 3D and not only see where it was, but how deep or, along
> which wall in the pocket it was located. I then went on an
> exploration mission in my basement to see hotspots in my entire
> electrical system. It was an amazing color display liken to
> XMAS. Then I noticed a large, unusually bright spot from the
> basement looking up at the kitchen floor. I was concerned, since
> it should have been a part of open floor and there should not be
> any heat source there unless it was an electrical problem beneath
> the floor. I ran upstairs only to find a cat, sleeping on a
> thick rug, on a ceramic tile, on a ¾" underlayment, on top of
> an OAK floor, on top of ¾" tongue and groove subfloor. That´s
> seeing a cat through 3" of solid wood, ceramic and a rug. Just
> laying there burning up cat food. I think these cameras are
> under $500 and even have APPS on cell phones that can do it?
> You wont be able to see though metal, but through anything else,
> maybe so. In fact, to perfectly mark the hazy images where I
> wanted to drill the hole to the stud, I used a small 1" square
> of aluminum foil. It has low emissivity and always appears DARK
> against anything else that is warm behind it. But also, be
> aware, that the aluminum foil is not only low-E, but it is also IR
> REFLECTIVE. So it can look very hot (98.6F) if you happen to be
> standing where the aluminum can reflect your body heat. Bob,
> WB4APR
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