little confusion with my Pyranometer project...
Yes I've no correlation except the good behavior on blue sky <> the colder result with a conversion close to 9000/10000m and cloudy days provided some results close to the reality...
I'll share my first results asap.
Thanks for your comments and advices... that sound really good, and could be the source of my third Design ;-)
Just to clarify (I should add several pix of the head of the sensor) I don't use a light sensor.
We operate by absorption of the full Visible light sprectum trough a black body (two little copper squares) in contact with a diode (the hot diode) The absorption create an increasing temperature which create a proportional current leak from the diode... We compare it with the 'cold diode' and the gap define the power level.
The system is really simple and the correlation was really good so easily.
But now for sure, a pelletier component could provide accuracy on low radiation level and the silica dome reduce the filtration. Great!
About the heater you could find it on eBay : https://www.ebay.fr/i/263937159569?chn=ps&dispItem=1
For the copper bridge: https it's a section of this anode://www.ebay.fr/itm/Anode-electrode-de-cuivre-en-barre-10-cm-x-8-mm-pour-galvanoplastie/222200872664?hash=item33bc343ed8:g:~lsAAOSwbe5aYKVg:rk:1:pf:0
Hi Thanks for your comments.
I made comparisons with the first Design, correlation is highlighted in the story's pix.
This last design is on going. I realized several tests and also correct several things in the logic. I hope send share some curves this weekend and upgrade the program.
Hi, thanks for your comment.
I upgraded the project and added the stp files for all parts.
Hi Jay, thanks for your comments.
You could find the vendor on eBay.com , have a look to 'snaucke-elements' or simple search 'Germanium Disc'.He's located in Netherlands and really serious. Its around 15€ for one sample 27mm x1mm.
Be careful, it's like a glass, avoid mechanical constraint during the placement, you could break it easily like me... I'm working with a 25mm diameter and 1mm of thickness (it's a compromise to place the both IR sensor plus the heater <> bigger is the lens, bigger will be the optical absorption) The head diameter is 26mm you need still to handle clearance in 3D printing, but more in this case to place the lens freely.
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