Re: [PSUBS-MAILIST] Miscellanous ideas

[Warren Greenway <opensourcesub@yahoo.com>]

Yeah. The coolest thing about the Fourier system
for subs is that it can be made with oof the shelf
parts and info. I'm not saying that time isn't
involved, but it is certainly possible. Systems like
this are used for many applications, and so a system
may actually be available that could be modified.
Just a thought. I think that this has the potential
to be a cheap safety feature.

Warren.

--- Steven Mills <barycenter@earthlink.net> wrote:
> >From: Warren Greenway <opensourcesub@yahoo.com>
> > You could actually record a signature of a speed
> boat,
> > and use a Fourier WaveForm analysis to match the
> > waveforms and set off an alarm. I don't actually
> claim
> > to understand Fourier analysis, but the algorithms
> > are readily available.
> >
> > Warren.
> >
> 
> Well, I didn't think this topic would get any
> responses beyond
> Warren. But let me add one more *possibility* from
> Warren's
> 3D engine program along with the collision
> detection. The
> transform engine has possibilities, too.  With some
> reworking
> or modification of the transform algorithms a
> wavelet transform
> engine or signal processor to visual display could
> be created
> from the collision detection data. A discrete cosine
> transform
> engine algorithm, which is a form of a fourier
> transform [ if memory
> serves :-o ] can be used as a basic framework.
> 
> --Steve
> 
> -------------------------------
>
separator--------------------------------------------
> 
> > --- Michael B Holt <tlohm@juno.com> wrote:
> > >
> > > On Thu, 27 Mar 2003 15:41:20 1100 (UTC) peter
> > > mckellar  writes:
> > > >
> > > >maybe not a workable idea at present, still its
> > > more thoughts to
> > > >consider.  btw i LOVE the collision detection
> > > software idea :))
> > >
> > > One idea I've kicked around more than once is a
> > > hydrophone
> > > that would listen for certain frequencies and
> sound
> > > an alarm
> > > when they were detected.    What I had in mind
> for
> > > this was to
> > > listen for a sound or sounds that are
> characteristic
> > > of all
> > > outboards.   Since most of us will be operating
> in
> > > waters
> > > that have lots of outboard traffic, the idea
> seemed
> > > a natural
> > > one.
> > >
> > > I presume the sounds of the lower unit gears
> would
> > > be what
> > > the gadget would listen for.
> > >
> > >
> > >
> > > Mike
> 
> 
> 
> 


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