EEVblog® Electronics Community Forum
Electronics => Projects, Designs, and Technical Stuff => Topic started by: Dhanushka on July 01, 2021, 04:28:34 pm
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Hi,
Could you please suggest me sensors which can be used to detect fire/flame from some distance?
The IR dual pin PIN phototransistor based hobbyist flame sensor module did not worked well for outdoor due to sunlight contains IR. The response of these for sunlight was the problem.
It is better that if these sensors and cheap and available in ebay/aliexpress.
Or, if can you suggest a alternative solution for a cheap fire/flame detection, I highly appreciate. :)
Thanks
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Long range fire detection probably isn't viable on a low budget, unless you want to mess with vision detection AI stuff.
What I'd recommend is getting a Basalt Cable cover (can handle >650c) and seeing if you can get a fireproof thermistor.
Another option might be to look into hacking apart a non-contact thermometer and trying to get a reading off the electronics in those (not exactly affordable IMO but you might find a cheap one).
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Check out Systron Donner, in Concord, CA.
Might be higher cost, than some hobby type parts.
They make and sell FIRE and overheat sensors and the systems associated. Often 28 VDC for aircraft systems.
The company has sold two types of mechanical / gas pressure actuated sensors, both for 'Fire' (extreme heat) and also for 'gross overheat', a general condition inside an engine cowling etc. (Circa 1980).
Using Google, I tried to find the optical sensor products, inventor Clark Bright assigned patent to Systron Donner. But pretty sure they were using interrupted or 'chopped' analog from the low output level sensor. That way, it's an AC signal; easier to process and amplify.
Try not to violate any patents or copyrighted stuff (I did used to work there!)
I think maybe spend some time, Google Patents, to check out (any) other similar flame sensing patents.
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I recall one approach uses thermopile sensors, watching for a noisy signal in the 1-10Hz range characteristic of flame flicker.
Tim
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Honeywell and Hamamatsu make solar blind
Uv fire sensors.
Steve
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Depends on the price, they are not the cheapest but high range it thermal sensors are designed for fire detection
Like MLX90614 or more resolution MLX90621
They can measure over 300 °C to mitigate false positivity
For detection of solid fuel fires and most of the liquid fuels
Won't detect like natural gas unless it heats something