Re: [Paparazzi-devel] Thermophiles

[Antoine]

Hi Filipe

To get an automatic calibration, I think you'll need a full 3rd axis, 
that is 6 thermopiles.
The substraction between opposite thermopiles output is done at 
electrical level, before amplification.
In the CVS, we have plans for a two axis sensor and a single axis one.
You can combine one of each to get a full 3 axis sensor. This solution 
has the advantage of easing the mechanical fiting in the airframe - With 
a monolithic 3 axis sensor, you'd have to find a location in the 
airframe where the 3 axis are unobstructed.

Best Regards

Antoine

ps: I think Ethan has some sensor PCB available - For the thermopiles, I 
use Melexis which I get direct from the importator - Martin and Ethan 
use Perkin-Elmer which they get from a german shop I think.

Filipe Varela wrote:

> Hi all
>
> Just wondering if anyone in Europe is available to build a  
> thermophile sensor kit for me. It would require 4 orthogonal  
> horizontal sensors plus a fifth vertical (pointing up) sensor (for  
> auto-calibration). Output goes to 10bit adc (atmega128) so analog is  
> perfect (7 pins: power in, ground, sensors[5]).
>
> Please specify cost (supplies plus work) and location.
>
> I am asking this because i can't get a hold of any thermophiles or  
> PCB manufacture. Unassembled is fine (i can solder it even if it has  
> smd parts).
>
> Thanks,
> Filipe
>
>
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