Infrared sensor array to detect mosquito entry

Vizier87

Active Member
Hi everyone.

I've been attempting to construct a simple mosquito entry sensor array using infrared photodiode pairs. They kinda worked, but the problem is the line of detection is too fine.

Ideally, the opening where the mosquitoes enter/exit is about 10cm x 10cm. That's where the sensors are installed.

I just wonder before I engineer the heck out of the setup, are there readily available sensor arrays I can use which work?

And yes, I have used cameras before. They work, but sometimes those bugs zip past through too fast and it doesn't detect it .

Appreciate the input.

Vizier87
 
With a 200 mm X+Y linear aperture, you might see a < 0.1% shift in transmitted light down in your noise level and need a very low reflected background for reflected light. An audio mic and bandpass filter would be needed with two back-to-back mics for the direction of motion and confirming they enter or exit to hear the bzzz like when you are sleeping.
 
I wonder if wing beat frequency could be basis for detection.....

Currently image recognition would work, buts escalates costs/complexity.
Yes, ultrasonic types have been around but to my knowledge they're not much of an option since they need to be pretty well filtered. Plus what I need is pretty much an "entrance" sensor.
 

What would you recommend? I've never used audio based types but pretty willing to try it out if it actually can be better
 
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