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-   -   OtherHalf Infrared Thermal Imager (https://talk.maemo.org/showthread.php?t=92706)

kimmoli 2014-02-16 17:33

OtherHalf Infrared Thermal Imager
 
TOHIRI

https://lh5.googleusercontent.com/-f...-no/tohiri.png

TOH with 8x8 grid thermal imaging sensor - Application to overlay temperatures over camera image.

Sensor: Panasonic GridEYE AMG8832 (measurement range -20 to +100 C)

First assembled board:
https://lh5.googleusercontent.com/-y...140416_011.jpg


(Original discussions here: http://talk.maemo.org/showthread.php...64#post1408564)

kimmoli 2014-02-16 17:37

Re: OtherHalf Infrared Thermal Imager
 
"proof of concept" in progress.

Sensor devices finally available for purchase, delivery time 8-10 weeks :( (Digikey does not sell to Europe)
Time to do some schematics/layout.

Got camera viewfinder up and running with mosaic -style semi-transparent overlay on it. (just random colors)

https://lh3.googleusercontent.com/-l...0216193032.jpg

(QRScany by Yoktobit kicked me going)

Daneel 2014-02-16 19:01

Re: OtherHalf Infrared Thermal Imager
 
You are unstoppable Kimmoli, whats next? TOHREPLICATOR?

Kabouik 2014-02-16 23:10

Re: OtherHalf Infrared Thermal Imager
 
Thanks again Kimmoli, this subforum would not be the same without you. And the Jolla in general.

I'm in for one of this OH provided that the accuracy and reliability are good enough (can you elaborate on both these please?). I may use that for acquirig scientific data, and although these data would be preliminary only and not to be published, I need reliability (at least comparatively among measurements, not so interested in absolute accuracy of measurements).

Count me in in that case.

[Edit] Apparently accuracy is about d=2.5-3.0 (for high gain and low gain, respectively), which will likely be too high for me, unless you have other information Kimmoli.

juiceme 2014-02-17 05:34

Re: OtherHalf Infrared Thermal Imager
 
Quote:

Originally Posted by Kabouik (Post 1413056)
[Edit] Apparently accuracy is about d=2.5-3.0 (for high gain and low gain, respectively), which will likely be too high for me, unless you have other information Kimmoli.

Unfortunately you cannot obtain better accuracy from sensors not of the externally cooled type. Bacground noise levels pretty much dominate the useful signal obtained from the device, and that is not likely to change due to the nature of infrared detection.

kimmoli 2014-02-17 06:25

Re: OtherHalf Infrared Thermal Imager
 
Ofcourse it is not a scientific instrument... (comp with juiceme)
But i think there are applications for this too. Finding hotspots, leaking points in your house during winter, electronics fault-finding and more,

But i need a prototype before i can say more.

TemeV 2014-02-17 07:47

Re: OtherHalf Infrared Thermal Imager
 
This is quite interesting project. What is the price of the sensor? I would have use for a cheap thermal imager.

cvp 2014-02-17 09:36

Re: OtherHalf Infrared Thermal Imager
 
Quote:

Originally Posted by TemeV (Post 1413080)
This is quite interesting project. What is the price of the sensor? I would have use for a cheap thermal imager.

~40$

http://www.digikey.com/product-detai...9-6-ND/3461620

strahl 2014-02-17 11:54

Re: OtherHalf Infrared Thermal Imager
 
There exists also MLX90620, a 16x4 sensor [1] which you can get for ~60 USD [2].

:) stefan

[1] http://www.melexis.com/Infrared-Ther...Array-776.aspx
[2] http://uk.futureelectronics.com/en/t...0-TU.aspx?IM=0

kimmoli 2014-02-17 12:14

Re: OtherHalf Infrared Thermal Imager
 
Altough (as said before) Digikey does not sell these to EU


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