| The past week I've been spending time going through the FLIR code on gitlab. Initially, it had appeared that our measurements with the camera had differed about 2 degrees C from what the thermocouple was giving (Ref ELOG 181). Upon inspection of the FLIR streaming code, I noticed a few issues:
1. The emissivity value wasn't set correctly (was 0.999 originally, should be about 0.95).
2. The ambient temperature was set to about 21.6 C (71 F).
3. The distance given before was about an inch off from what I measured.
These three parameters all must be manually specified to calculate the temperature values, and are what I assume caused the larger temperature difference seen before. I've attached a new set of measurements that I took below, where 6 images were taken by the camera, looking at a heating source with a current of 0.15 A being driven. The difference between the camera and the thermocouple were much smaller, as seen below. I'd still like to take a few more measurements to solidify that this has rectified the issue, but at the moment it seems this is working much better.
Images at: https://drive.google.com/drive/folders/1VDvZ1rfEGWsHq1AgG-chde3Cd8Do_piD?usp=sharing |