fire sensors

juanarysantana over 10 years ago

Anybody interested in discussing about fire sensors for long distance range (~500m)?

Available technologies?

Prices?

Research?

vsluiter over 10 years ago

What about light spectroscopy: http://www.avantes.com/applications/application/item/695-avaspecs-used-in-forest-fire-finders
I just saw this product today: https://www.tindie.com/products/PureEngineering/arduino-c12666ma-micro-spectrometer-/ but probably it's not in the right spectral range.
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DAB over 10 years ago

You can probably use the RPi camera with an IR filter.

Slap a 500-mm lens on it should get you the distance you want.

After that, you just need to setup a scanning fixture and let it look over the area.

Emissive IR is very strong compared to reflected IR, so you might need to set up some filtering.

DAB
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dougw over 10 years ago

You can probably use instruments like Omega OS523E-LR or a Raytek RAYR3ILRSCU, but they can get expensive.
I did some fire sensing with a fairly inexpensive narrow band UV sensor to pick up a unique spectral line. I focused it with an aluminum reflector because lenses that will pass UV (or IR for that matter) can get very expensive. I did not try for distances beyond a few meters, but the sensor was pretty sensitive it would detect a candle about 10 meters away - perhaps a good aluminum parabolic dish would provide enough range.....
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juanarysantana over 10 years ago in reply to dougw

OK, thanks a lot for the information, sounds that this is a very good option, I will certainly try.
Regards
Juan
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juanarysantana over 10 years ago in reply to DAB

Excellent, many thanks for the idea!
Regards
Juan
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juanarysantana over 10 years ago in reply to DAB

Good, these are very interesting ideas, it sould work,
Regards and thanks
Juan
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