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Radar to detect mosquitoes?

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bson:

--- Quote from: RoGeorge on July 30, 2020, 12:04:08 pm ---I remember seeing a video (not sure if it was from the same company) where in a window frame there was a setup with some mosquito detector (again, don't recall if it was radar or video detection), then burning down the mosquito with an automatically aimed LASER.

--- End quote ---
My guess is the one in the video isn't aimed.  Instead it's used at low power to detect an insect purely by breaking it, at which point it pulses it briefly, and once only, at high power.  Something like this would be most useful where people can't get their hands or eyes in the beam.

LaserSteve:
The laser zapping of mozziess thing comes up like clockwork a couple of times a year. Yes, you can use a zoom lens to find mozzies, tell from the wing beat rate if they are male or female, then run a co-linear beam of violet or near infrared light right back down the lens and blow the wings off.  If your demo mozzie are in thick in an aquarium with a lightly colored background downrange.

Here is where it falls apart.  The lens field of view and eye safety. 

1. Thirty to sixty sets of lenses and galvanometer
Scanners per installation to cover a hemisphere.

2. Even so called low power  "eyesafe" lasers ( near to mid infrared) adsorbed by the cornea and not making it to the retina  are still dangerous in this task. It takes x amount of millijoules to fry a wing off a fast moving skeeter and paradoxically an eye is still far easier to damage then the tiny body parts.

Mother nature can make skeeters faster then the fastest galvos can target  them. A friend makes the fastest and there is no way he can get them down to the targeted 20$ a pair.

3. Skeeters can just fly over the "cone of no escape" and off to their next target. Required power goes up dramatically with range as the beam expands.

4. Having a Nominal Ocular Hazard Range of 800 feet to tens of kilometers is a problem. After all, how do you  have villagers running around yet have a system that meets the standard for laser safety of less then a one in a million possibility of eye damage per exposure?

Yes . You could sweep a big beam around the sky and kill bugs, but it is horribly dangerous, horribly inefficient, and other methods are far cheaper. 

One system can protect a doorway as designed and published,, but is the low Pkill and eye hazard worth it?
Well it can protect a doorway till you stand in it.

Steve

NiHaoMike:
Perhaps the easiest way to kill the mosquitoes would be to fly a small drone at them and let the propellers slice them up.

RoGeorge:
The most effective way to catch mosquitoes indoors, without chemicals and without walls smearing, is with a vacuum cleaner.  The mosquitoes can't cope very well with strong wind, or air currents.  There are some recent designs of quiet vacuum cleaners.

Once you detect the mosquito, aim an air vortex to them, to push the mosquito near the window frame, then make the window frame as an air sucker, like a vacuum cleaner.   ;D

RoGeorge:
Hitting them with a short but very strong puff of compressed air might work too (by dismantling their wings for example, but I never tried).

Such a device will need to detect the insect, then to aim at it with an air nozzle, then to open a compressed air valve for just enough time, so a short "bullet" of compressed air to escape and hit the mosquito.

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