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Predict 3D position of flying bugs and pest to shoot down them with a laser

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Re: Predict 3D position of flying bugs and pest to shoot down them with a laser

#101

Post by 41b696ef1113 »

drited wrote: post #49
picture wrote: post #36

Earlier quoted context omitted.

Why not just use a mesh screen with a fan? Bugs generally don't fly with a lot of thrust to weight so they get trapped against the screen and die. I think NightHawkInLight has some videos about this on yt, though its definitely not some new idea.

Ya I saw this Dan Rojas video linked on HN a while back when the laser mosquito idea came up. He uses an open bottle of carbonated water to attract them to the fan/screen trap https://youtu.be/6BhV-o77RqQ

That is such a beautifully simple idea.

Re: Predict 3D position of flying bugs and pest to shoot down them with a laser

#102

Post by tabulatouch »

CamperBob2 wrote: post #88
14 wrote: post #82

Earlier quoted context omitted.

The comment said your system has a bug as in it malfunctions and decides to shoot the coin anyways, and his other point was you will be looking at the coin wide eyed so perfect chance for a reflected laser to hit you in the eye if by chance the correct angle happens to line up and send it back to your eye. Also, I've seen too much unbelievable stuff actually happen so nothing is unbelievable in 2022. Yes we are talki…

And how many of those 7 billion people will die of mosquito-borne diseases...? It's time to wipe out them out. We don't need mosquitoes, and neither does Mother Nature. Use gene tech to do the job, not Rube Goldberg hacks with lasers.

Ok.. So bats die of hunger, we don't need them either, and all the way up to humans (AI said...)

Re: Predict 3D position of flying bugs and pest to shoot down them with a laser

#103

Post by CamperBob2 »

tabulatouch wrote: post #102
CamperBob2 wrote: post #88

Earlier quoted context omitted.

And how many of those 7 billion people will die of mosquito-borne diseases...? It's time to wipe out them out. We don't need mosquitoes, and neither does Mother Nature. Use gene tech to do the job, not Rube Goldberg hacks with lasers.

Ok.. So bats die of hunger, we don't need them either, and all the way up to humans (AI said...)

Bats don't need mosquitoes, either.

https://www.gardenmyths.com/myth-bats-eat-mosquitoes/

Re: Predict 3D position of flying bugs and pest to shoot down them with a laser

#104

Post by bryondowd »

zarzavat wrote: post #70
solidsnack9000 wrote: post #19

Earlier quoted context omitted.

Maybe if several low power lasers were fired together, to converge at the predicted position, it would moderate the risk of collateral damage. Even a few millimeters away from the target position, the radiative flux (W/m²) would be much lower, likely at safe levels.

What if all of those lasers converge to hit someone's eye? I don't see how a laser can have enough power density to kill a mosquito but still be eye safe.

Is there a max angle at which two lasers could pass through the pupil and strike the retina? That's assuming that strikes elsewhere don't pose a blinding risk for the energy level required to kill a mosquito, which I have absolutely no support for. But if that is the case, you could place your lasers and define a kill zone where no two can converge with less than a safe angle.

If the assumption isn't correct, you could possibly still place at least two lasers and define a narrow zone between them where the angle would be about 180 degrees. Would be damned tough to hit an eye from two sides at once. But that limits you to half power per laser, which probably isn't enough margin.

Re: Predict 3D position of flying bugs and pest to shoot down them with a laser

#106

Post by tdrdt »

dumbfoundded wrote: post #83
feupan wrote: post #77

Earlier quoted context omitted.

That’s not how reflections work. Also there’s no bug as big as a coin that such a system could/should kill, so it’s pretty easy to not misdetect that. Again, corners have a higher probability of ending up in your eye than even just someone flipping a coin in 2022.

It's just an example. I've worked with industrial laser cutters (100+watt CO2) before and even with all of the protective equipment built into the machines, you still wear glasses. The idea that you could use something like this in an exposed way is crazy to anyone who's actually worked with them. Any mistake is instant and permanent. You can't make a consumer product out of this. Maybe like a large box that only mos…

I would like to have a cheap laser engraver/cutter but I am just afraid to buy one. Most kits don't have any protection at all except for some goggles. This might be fine for yourself but not for someone stepping into the room.

Lasers are no joke.

'Don't look into the laser with your remaining eye' is also no joke.

Re: Predict 3D position of flying bugs and pest to shoot down them with a laser

#108

Post by taneq »

ecpottinger wrote: post #85
jcims wrote: post #73

Earlier quoted context omitted.

There are a number of DIY instructions for building a phased array ultrasonic manipulator, eg [1]. You might be able to 'tweeze' the offender into a capture apparatus or high voltage deanimator. https://hackaday.com/2021/08/18/phased-array-levitation-is-s...

Why not the same idea with lasers, if you have an array of low power lasers but they all focus on one 3D location, if you are not at the focus location you will not be exposed to a dangerous laser power. An array of hundred to a thousand low end laser diodes using a an array of mems mirrors to aim the beams will ensure the focus point will fry the bug.

At that point you're deliberately removing the collimation and I'm not sure how much the coherency really adds so you might as well just focus a heat lamp on them.

It's still bad if it somehow does end up targeting something delicate or flammable but at least you've gone from a line to a point. Plus a 500W laser is super pricey but you can pick up a 500W heat lamp at the local hardware store. I wonder if anyone's tried it?

Re: Predict 3D position of flying bugs and pest to shoot down them with a laser

#109

Post by taneq »

jcims wrote: post #73
taneq wrote: post #56

Earlier quoted context omitted.

After abandoning the laser idea due to the aforementioned “fully automated blindness / house fire machine” issues, I’ve often idly wondered if you could use a phased array of small subwoofers to generate a precisely targeted region of extreme pressure drop. That way you could just instantaneously and explosively decompress the suckers in such a way that’s probably safe for mammals.

There are a number of DIY instructions for building a phased array ultrasonic manipulator, eg [1]. You might be able to 'tweeze' the offender into a capture apparatus or high voltage deanimator. https://hackaday.com/2021/08/18/phased-array-levitation-is-s...

Huh, one of the comments even mentions using it to deal with mosquitos. :)
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