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kimmoli's Avatar
Posts: 559 | Thanked: 2,701 times | Joined on Dec 2013 @ Espoo, Finland
#1
TOHIRI



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:



(Original discussions here: http://talk.maemo.org/showthread.php...64#post1408564)
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TOH ideas, concepts and creations since 2013 toholed tohuart toheink Heebo tohIRi i2ctool tohmm LeTOH FMTOH

Last edited by kimmoli; 2014-04-17 at 14:30.
 

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kimmoli's Avatar
Posts: 559 | Thanked: 2,701 times | Joined on Dec 2013 @ Espoo, Finland
#2
"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)



(QRScany by Yoktobit kicked me going)
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Last edited by kimmoli; 2014-02-17 at 08:39.
 

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#3
You are unstoppable Kimmoli, whats next? TOHREPLICATOR?
 

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#4
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 I may use that for acquirig scientific data, and although these data would be preliminary only and not to be published, I need reliability (at least comparatively among measurements, not so interested in absolute accuracy of measurements).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.

Last edited by Kabouik; 2014-02-16 at 23:20.
 

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#5
Originally Posted by Kabouik View Post
[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.
 

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#6
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.
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#7
This is quite interesting project. What is the price of the sensor? I would have use for a cheap thermal imager.
 

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#8
Originally Posted by TemeV View Post
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
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#9
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
 

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#10
Altough (as said before) Digikey does not sell these to EU
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