Good day,
Is there a way to increase the detection of Sparkfun AS7331 for flame detection? and what IR sensor do you recommend for detection flames at 2-2.5 meters max?
As far as I can understand from seeing the PCB and docs, there is no provision for increasing the range of Sparkfun AS7331. The generic YG1006 sensor that we see is capable of sensing from maximum 1M. However, for a bit better performance, you can make a multichannel board like this one: https://www.pcbway.com/project/sharepro … duino.html
You can also test and compare if thermocouple is better for your application.
How about Sparkfun IR sensors? could they work?
Which one are you planning to use? Could you share the link please?
What Sparkfun IR sensor would you recommend?
The AS7331 UV sensor has no limit on range, and it features a number of gain and conversion time settings to change the sensitivity. See the device data sheet and the Sparkfun library for the available settings.
However, if you want to detect a point source of flame, then the cone of vision (+/- 10 degrees) can be a limitation. The detector integrates all the UV light within the cone of vision, and a point source far from the detector will just get lost in the background.
If the cone of vision is a limitation, what sensor could I use or how can I expand the cone of vision? Wait, where did you see the 10 degree cone of vision, is this the angle of incidence?
In the device data sheet. +/- 10 degrees, or 20 degrees total width.where did you see the 10 degree cone of vision
how can I expand the cone of vision?
For long range point source detection, a narrow cone of vision is required, for example, using UV lenses, along with the ability to point the detector in various directions and scan the scene. The same is true with IR detectors, although with IR, it is much easier to make an imaging detector.
This article explains the problem with cone of vision: https://link.springer.com/article/10.10 … 21-06193-2
Scroll down to “3.2 Region-based field of view”