🚀 go-pugleaf

On 20 Mar 2007 21:56:10 -0700, "Josh916" <jkacen@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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>> >>- 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.
>
>I will keep looking into it as I also have a backup plan using the
>webcam.

Go with the backup plan, usehhte webcam. Processing power is cheap
these days.


>
>---------------
>AS FOR PHIL ALLISON I THINK YOU SHOULD LOOK AT THIS WEBSITE:
>http://members.iinet.com.au/~rutlidge/alanindex.html IT SEEMS YOUR
>REPUTATION PROCEEDS YOU.
>---------------