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Post by vincent on Mar 22, 2024 21:56:42 GMT 10
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Post by dennisw on Mar 23, 2024 10:13:49 GMT 10
Don't stand in front of those things if you have a pacemaker, the concept has been around for a while but is getting better.
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Post by Ian Thomas on Mar 24, 2024 3:34:13 GMT 10
Drone shoot-down mainly relies on jamming the control signals coming from the operator - who is typically hidden away someplace out of sight. You probably could bring one down with an EMP. Only snag is, that would shutdown everything in the neighbourhood. Err .. Whoops!  I did a bit of experimenting last year with drone detection. Thought my sister might have been interested to "kick in" with it, given her current job. But nope. 🙄 Results were highly encouraging so I'll keep on with it when time allows. Lot of other stuff "on the plate" right now. There's a need for drone detection when prospecting out in the sticks. For reasons that should be pretty damn obvious ... Direction-finding a noise source is straightforward ... the time delay between a signal's arrival at two microphones tells you the phase-difference hence the bearing. The source was a metronome. Very sharp tick-tock sound, which made things easy. Detecting and extracting a broad-band noise source (drone motor) when it's afar off and buried in background noise takes a bit of processing power. |
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Post by vincent on Mar 24, 2024 5:57:43 GMT 10
Holy moly, Ian. Both you and your sister are really brilliant compared to us ordinary mortals! I could not imagine me doing the kinds of experiments you do.
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Post by dennisw on Mar 24, 2024 11:34:50 GMT 10
Microwave bursts are effective at jamming or confusing drones, but play havoc with other electronics nearby, hence my comment about pacemakers etc.
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Post by Ian Thomas on Mar 25, 2024 8:55:29 GMT 10
What, me? "Smart"??  Heh, no way! 🤷 Not really. It's the software does it all. Plus the fact that high-capability instruments are an affordable price these days. As in less than ~ $1000 - $1500. eg Storage oscilloscopes with BW ~ 100MHz. They can store literally thousands of data points as text files for the user to do signal analyses, post experiment. It's amazing stuff. eg You can snip out a small section of data from one of the Audio Direction Finding (ADF) test runs and take a seriously up-close look. |
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Post by dennisw on Mar 25, 2024 14:27:38 GMT 10
Don't sell yourself short Ian, you have enough curiosity to be one of the best, don't let your humility ruin your confidence.
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Heh, no way! 🤷 Not really. 