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Science Forum Index » Electronics - Misc Forum » Prototype Project - Looking for some help
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| jasen |
 Posted: Fri Jan 19, 2007 6:39 am |
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On 2007-01-19, synapsedm@gmail.com <synapsedm@gmail.com> wrote:
Quote:
Baron,
I appreciate the idea but I still don't think it'll work for my
application only because, and this is my fault for not including it,
there are 5 different sections on the tube that are to be impacted and
I think it would be too difficult to try to pinpoint which section was
hit with the microphone setup.
Again, thanks for the info and sorry I left that detail out.
- Jace
put four or five microphones in it and the impact point can be determined
by the time-lag between the microphone responses.
--
Bye.
Jasen |
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| Pete Verdon |
| Posted: Tue Jan 23, 2007 12:41 pm |
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synapsedm@gmail.com wrote:
Quote: Baron wrote:
OK ! I get the picture. Use a simple microphone capsule, say
electret. Take the signal from it and manipulate it to get what you
want. Amplitude will tell you how hard the device was thumped and the
frequency will tell you where.
I appreciate the idea but I still don't think it'll work for my
application only because, and this is my fault for not including it,
there are 5 different sections on the tube that are to be impacted and
I think it would be too difficult to try to pinpoint which section was
hit with the microphone setup.
In theory at least, it should be possible to identify where in a known
tube the sound originated by analysing the waveform produced by the
microphone. In practice this may not be sufficiently accurate, or may
simply be too hard a signal-processing problem to be worthwhile. In any
case, the fact that your tube could be hit with nearly anything, rather
than a known striker, probably rules out any detection based on sound.
I think the best idea so far is the air-bladder one, or possibly a
variation using some kind of liquid or gel in the bladder.
Pete |
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