DIY thermal vision shoots 360° panoramas

Re:DIY thermal vision shoots 360° panoramas by joshvm on Tuesday April 18, 2017 @04:28AM (#14137246)

An alternative is the 8x8 Grid-EYE from Panasonic, costs around £30. The Melexis equivalent is a 16x4 which costs about the same. Note you'll need to fill in a fairly lengthy export/release form to get hold of the Grid-EYE sensors. I haven't had any problems ordering them from Farnell, just tell them what your project is.

Both are fairly easy to talk to over I2C. You can make a passable wireless (low-res) thermal camera using something like a Particle Photon.

The MLX90640 isn't out until September unfortunately.

NB: Actually Farnell have the Grid-EYE for only £16, but the full range ( -20 to 100) model is backordered. You can still get the 0 to 80 version easily.

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Re:DIY thermal vision shoots 360° panoramas by eb0la on Tuesday April 18, 2017 @04:48AM (#14137303)

I really like Melexis uses SO-19 packaging instead of the Panasonic Grid-eye SMD.

Here are the octopart links for both:

AMG8851 ( https://octopart.com/amg8851-panasonic-23284568 )

MLX90621 ( https://octopart.com/mlx90621esf-bad-000-sp-melexis-52364204 )

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Re:DIY thermal vision shoots 360° panoramas by annnnd on Tuesday April 18, 2017 @11:14AM (#14139490)

Or Flir Lepton. A bit more pricey (~$200), but image quality (wrt. noise) and resolution (80x60) are much higher.

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Re:DIY thermal vision shoots 360° panoramas by tossandturn on Tuesday April 18, 2017 @12:03PM (#14139947)

I used the Melexis MLX90260/MLX90261 back in December 2014 for some sensors research at work, and they were not very helpful and the documentation was appallingly ambiguous for important parts of the programming; plus, it offloads all the mathematics (not insignificant amounts of floating point and statistics) to your processor (not a good deal for embedded work). The output, once processed, though, was very accurate and provided for additional processing to make more use of the information than similar offerings.

The Panasonic Grid-Eye offering was much easier to use, and did not require additional processing power just to make use of the information.

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Re:DIY thermal vision shoots 360° panoramas by joshvm on Wednesday April 19, 2017 @03:17AM (#14146068)

I've used their single point IR sensor before, just had a look at the documentation for the 16x4 - holy hell that's a lot of steps just to get a calibrated sensor reading! Do they provide a C library for it, or are you expected to write and test your own?

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Re:DIY thermal vision shoots 360° panoramas by SauliusLukse on Tuesday April 18, 2017 @08:00AM (#14138097)

MLX90640 would be nice, but only for speed improvements. I would like to add additional lenses to improve resolution, but they are not cheap.

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