REFLECTOR:Secondary fire detection

[Hiroo Umeno]

Pat,

CCDs are quite vulnerable to heat.  You need to look at the data sheets
for the operating temperature range.  The heat inside the engine
compartment is likely to far exceed the allowable heat rating of most
low-cost CCDs.

As for switcher, I am currently designing a 4:1 video mux based on
LT1204 device and a PIC.  I am intending to put this in the same housing
with the LCD so that there are four buttons that corresponds to each
cams I can switch through.  The cool thing about using the PIC is that I
can set it to "scan" every so often as well.

I am thinking of mounting cams on the following locations.  Co-pilot
side bottom winglet (180 degree pan), under nose looking forward-down,
overhead duct capturing panel.

For supplies of LCD panels, Earth Computing (www.earthlcd.com) usually
has some good selection of them.  You can also scour some of the surplus
electronics outlet and get a fairly good deal if you are not particular
about specific device you are looking for.

Hiroo


-----Original Message-----
From: reflector-admin@tvbf.org [mailto:reflector-admin@tvbf.org] On
Behalf Of Pat Shea
Sent: Thursday, July 17, 2003 11:23 AM
To: reflector@tvbf.org
Subject: RE: REFLECTOR:Secondary fire detection

Hiroo,

I'm leaning towards keeping the small CCD cams in the
engine compartment primarily for fire detection. It
looks like it's going to take two to get full coverage
of the critical areas. There may also be some benefit,
at least during the tweaking stage, of being able to
see/record what's going on inside the cowl during
flight (tuft testing?). Two cams either means an A/B
switch, two monitors, or a split screen. I was able to
find a company that sells a color, waterproof,
"helmet" cam w/ a cool aluminum protective mount:
www.helmetcamera.com. I haven't had a chance to look
at LCD monitors yet (or the ability to split the
screen) - any leads on a good source for these??

Pat

--- Hiroo Umeno <humeno@microsoft.com> wrote:
> One idea may be to install the "wingtip cam".  I
> have been researching
> this but one could install a small CCD camera on the
> wingtip (perhaps on
> the lower winglet) that can be panned.  Not only it
> would offer a way to
> "see" if your cowl is blowing smoke / fire but it
> will also serve as
> "rear-view mirror" when starting engine, and offer a
> feed for your
> in-flight footage.
> 
>  
> 
> The cameras can be had for less than $100 these
> days, and a small LCD
> monitors can be had for about the same.
> 
>  
> 
> Hiroo



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