🚀 go-pugleaf

On Mar 21, 2:56 pm, "Josh916" <jka...@gmail.com> wrote:
> On Mar 21, 3:33 pm, Donald <Don...@dontdoithere.com> wrote:
>
>
>
> > Josh916 wrote:
> > > The project is to locate a r/c boat in a roughly 2 to 3m^2 water
> > > filled box, hence the transmitters or recievers will only be on the 3
> > > or 4 walls of the box.
>
> > > It will need to be fairly accurate considering the size of the box
> > > relative to the size of the boat (i.e down to cm's).
>
> > > We are also considering placing a webcam above the box and using image
> > > processing to locate the boat, however I thought we might get more
> > > accurate results using RSSI.
>
> > > I hope that helps.
>
> > > Josh
>
> > > On Mar 21, 2:44 am, chuck <nos...@nospam.org> wrote:
>
> > >>Josh916 wrote:
>
> > >>>I would like to use RSSI to locate an object in a 3D space. The space
> > >>>will be a square box with transmitters located on the 4 corners. An
> > >>>object will be place at certain positions within the box and I want to
> > >>>be able to determine its location inside the box. Much like an
> > >>>internal GPS.
>
> > >>>I would like to know what components (IC's?) I need to perform such a
> > >>>task.
>
> > >>>Or if anyone else has any other more effective methods to acheive such
> > >>>a task your comments are welcomed.
>
> > >>>Thanks,
>
> > >>>Josh
>
> > >>GPS doesn't use RSSI, of course.
>
> > >>Is the task you want to perform the use of RSSI, or the determination of
> > >>position location with a box? What kind of accuracy do you hope to achieve?
>
> > >>Have you considered ultrasonic distance measurement?
>
> > >>Chuck
>
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> > >>----= East and West-Coast Server Farms - Total Privacy via Encryption =----- Hide quoted text -
>
> > >>- Show quoted text -
>
> > Josh,
>
> > Your idea has been tried by big governments with big budgets.
>
> > NO, it will not work.
>
> > If you care to read a little, you may find a not so cheap way of doing
> > what you want:http://en.wikipedia.org/wiki/Pseudolite
>
> > google has lots of links:http://www.google.com/search?hl=en&c2coff=1&sa=X&oi=spell&resnum=0&ct...
>
> > good luck
>
> > If you find a way of getting this done, in any home made way,
> > please let us know.
>
> > donald- Hide quoted text -
>
> > - Show quoted text -
>
> Thanks for everyones help, RSSI was mentioned to me by a fellow
> academic and I'm at the stage of researching its possiblilites.
>
> He seems to think that it is possible.

Josh, he is wrong.
It can be done (sort of) on a larger scale, but at the small scale you
are talking about it's just not possible as other posters have
mentioned. You would be lucky to determine if the object is inside the
box or outside, let alone its position inside.

> I will keep looking into it as I also have a backup plan using the
> webcam.

Seriously, start your backup plan now. Then it just becomes
essentially a software project.

Dave.