Well I didn't have a pingpong ball but I tried it with a small rubber ball
and it works :) The distance is being overestimated by about 10cm which I
think I can compensate in the software.
Now all I have to do is to find a way of suspending 20 pingpong balls!
On 11/20/06, Conor Todd <[EMAIL PROTECTED]> wrote:
You might find that doing something as simple as suspending a pingpong
ball a short distance away from the ultrasound trancievers will reflect the
signals and echoes sufficiently to for the Crickets to hear their neigbors
laterally. The pingpong ball will act like a spherical mirror.
- Conor
On 11/19/06, Sarfraz Nawaz <[EMAIL PROTECTED]> wrote:
>
> I want to place all of the crickets on the ground in a small grid
> topology and then I want to use them in a symmetric configuration i.e.
> each cricket becomes a beacon in a while and its neighbors estimate their
> distance to this beacon.
>
> On 11/20/06, Conor Todd < [EMAIL PROTECTED]> wrote:
> >
> > The design of the Cricket assumes that beacons are mounted on the
> > cieling, facing down, and listeners are on the ground, facing upwards. What
> > are you using the Crickets for?
> >
> > - Conor
> >
> > On 11/18/06, Sarfraz Nawaz <[EMAIL PROTECTED]> wrote:
> >
> > > Hi all,
> > >
> > > I am planning to use MIT cricket motes for some of my experiments.
> > > From what I have heard and read it seems that the ultrasound transceiver
on
> > > the mote is fairly directional. I intent do use them by placing them on
the
> > > ground with the ultrasound transceiver facing upwards.
> > >
> > > Does anyone have any experience that might be helpful. Is there any
> > > way of making the transceiver more omnidirectional?
> > >
> > > Regards
> > >
> > > _______________________________________________
> > > Tinyos-help mailing list
> > > [email protected]
> > > https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
> > >
> > >
> > >
> >
> >
> > --
> > "Thought is only a flash in the middle of a long night, but the flash
> > that means everything."
> >
> > - Poincaré
>
>
>
--
"Thought is only a flash in the middle of a long night, but the flash that
means everything."
- Poincaré
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