Robert,

What type of gyros are you talking about? I have been working on an
inertial measurement project for the last year and I haven't come across
that type. Do you have links for them? I'd be very interested.

We use piezo gyros (which operate at around 25kHz) but,AFAIK, they really
do vibrate a piezo crystal and sense the flexing of the crystal due to
Coriolis force. I have heard of laser ring gyros
(many $$$) which sense the phase shift in a pair of laser beams going
around a ring, but I doubt that would work with sound waves (since it uses
relativistic effects). The only type similar to what you mention that I
have heard of is a proposed idea of transmitting sound waves inside a
gas-filled chamber and sensing the changes in standing wave pattern due to
the Coriolis force's effect on the boundary layer around the chamber walls.

Sean

At 12:58 PM 10/17/00 -0600, you wrote:
>Yes, they use gyros. Ultrasonic gyros where the u/s mechanical
>wave bounces around inside a piezo crystal. They sense the phase shift
>resulting from motion, and then change the clock timing on the CCD chip
>so that the image gets stabilized as it gets shifted out. This
>technique can only compensate for horizontal/vertical motion, not
>rotation, but that is sufficient for most users.
>
>Checkout the website
>http://www.howstuffworks.com
>for hundreds of explanations on other stuff.
>
>rad0 wrote:
> >
> > Hello Picsters!
> >
> > I was wondering how the modern camera
> > stabilization sytems work, I mean the systems
> > used on small hand held video cameras??
> >
> > I thought they used some type of gyro, and I was
> > wondering about the systems and the gyro's.  Are
> > these gyro's without moving parts?  Is something
> > spinning or is there another way to make a gyro
> > without spining pieces??
> >
> > Thanks
> >
> > --
> > http://www.piclist.com#nomail Going offline? Don't AutoReply us!
> > use mailto:listserv@mitvma.mit.edu?body=SET%20PICList%20DIGEST
>
>--
>http://www.piclist.com#nomail Going offline? Don't AutoReply us!
>use mailto:listserv@mitvma.mit.edu?body=SET%20PICList%20DIGEST

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
use mailto:listserv@mitvma.mit.edu?body=SET%20PICList%20DIGEST