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by jim_hahn
Tue May 03, 2016 1:46 pm
Forum: General discussion
Topic: Need High Accuracy Electronic Target using triangulation
Replies: 44
Views: 9394

Re: Need High Accuracy Electronic Target using triangulation

I may have misread the original post too. If it's airgun pellets slower that the speed of sound (c), my solution won't work. The acoustic "through air sensors" I use and the commercial systems use require supersonic bullets which produce a cone shaped shock wave. sine(theta) = c/v. Airguns run at ab...
by jim_hahn
Mon May 02, 2016 8:49 pm
Forum: General discussion
Topic: Need High Accuracy Electronic Target using triangulation
Replies: 44
Views: 9394

Re: Need High Accuracy Electronic Target using triangulation

Let me answer a couple posts at once. The 50K lines of code are mostly Java, which amounts to C, developed inside Eclipse. The Photon is pure C. We do use matrix math when calibrating. There is an optical based product on the market which detects holes based on the previous image frame compared to t...
by jim_hahn
Mon May 02, 2016 5:22 pm
Forum: General discussion
Topic: Need High Accuracy Electronic Target using triangulation
Replies: 44
Views: 9394

Re: Need High Accuracy Electronic Target using triangulation

I and several other retired SW and EE types have been working on this problem for 5 years. Our intent is purely to have fun, no desire to commercialize. Our system can deliver 0.01 inch accuracy on a good day and an inch on bad hair days. We use a Photon to capture the TDOA (Time Delay Of Arrival) m...

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