Can this be done???
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We have a client that would like to track containers around a large
manufacturing plant. These containers are the large and can be anywhere in
the facility (its about a 1/4 mile area). Basically my questions is this.
Can I get accurate positioning information using RF or other technology?
possibly triangulation using 3 receivers? I dont know if you can do that.
But GPS is too global and inaccurate to work in this small of an area.
What do you guys think? I know LORAN technology works by triangulation,
but I dont know if this project can even be done. Thanks for any help.
- Matt
matt@m...
manufacturing plant. These containers are the large and can be anywhere in
the facility (its about a 1/4 mile area). Basically my questions is this.
Can I get accurate positioning information using RF or other technology?
possibly triangulation using 3 receivers? I dont know if you can do that.
But GPS is too global and inaccurate to work in this small of an area.
What do you guys think? I know LORAN technology works by triangulation,
but I dont know if this project can even be done. Thanks for any help.
- Matt
matt@m...
Comments
writes:
> We have a client that would like to track containers around a large
> manufacturing plant. These containers are the large and can be anywhere in
> the facility (its about a 1/4 mile area). Basically my questions is this.
> Can I get accurate positioning information using RF or other technology?
> possibly triangulation using 3 receivers? I dont know if you can do that.
> But GPS is too global and inaccurate to work in this small of an area.
> What do you guys think? I know LORAN technology works by triangulation,
> but I dont know if this project can even be done. Thanks for any help.
>
I saw a demonstration by Motorola that used very small spread spectrum radios
on students and multiple receivers on buildings to track them. The devices
were, essentially, panic calls -- press a button and the student position
would "light up" on a computer screen. Security personnel kept their
transmitters on full-time, allowing the dispatcher to direct the closest
officer to the student in distress.
I guess the short answer is "Yes" -- with the right radios.
-- Jon Williams
-- Parallax
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couldn't you set up tx moduals (on the containers) that sent a signal to be
recieved by tx/rx mods (around the plant) the tx/rx mods could be synced
together by a time tick, possibly this atomic clock signal i've seen talked
about on thi site. the time from the container signal to each tx/rx could be
compared to deterime position. like GPS but more local. I don't know if the
stamps are fast enough for any type of accuracy. also i thought the GPS unit
I have played with are good for about 10 to 30 fet long/lat if the object is
stationary for a brief period of time, i think it's actually more like 3 ft
now-some of the govt scrambling as been stopped in about 1998.
just a thought
shannon
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race cars that they claim 16 ince accuracy at 200 MPH- i dont remember who
they are but they are affialeted with racelogic out of england,
www.racelogic.com i think. this unit is about $8000.00, but dont panic its
race car stuff-im sure you could do it for alooottt less- but at least the
accuracy is available thru GPS
shannon
[noparse][[/noparse]Non-text portions of this message have been removed]
If these containers are outdoors and have a pretty good view of the sky, I
wouldn't throw GPS out the window so
quickly. As for your accuracy requirements, you can pay for whatever you want.
Like someone pointed out in
another response, Clinton did mandate that selective availability (SA) be turned
off a couple years back, so a
couple hundred bucks (+/-) buys you a single frequency receiver that will get
you an answer to about 30 feet. If
you need to do better, apply differential corrections to drive the accuracy to 6
feet or so. If you need better
still, go with a dual frequency (L1 and L2) receiver plus the differentials,
etc. We have a research group that
does millimeter level positioning in this manner.
If you're indoors, you might investigate RFID (radio frequency identification).
You'd set up transceivers as
zones in the locations where you want to track the containers. With RFID, I
believe you'll only get an answer
that tells you if you're in/out of a zone, but not more precision beyond that.
Good luck.
Clark Hughes
Matt Johnson wrote:
> We have a client that would like to track containers around a large
> manufacturing plant. These containers are the large and can be anywhere in
> the facility (its about a 1/4 mile area). Basically my questions is this.
> Can I get accurate positioning information using RF or other technology?
> possibly triangulation using 3 receivers? I dont know if you can do that.
> But GPS is too global and inaccurate to work in this small of an area.
> What do you guys think? I know LORAN technology works by triangulation,
> but I dont know if this project can even be done. Thanks for any help.
>
> - Matt
> matt@m...
>
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--
J. Clark Hughes
Applied Research Laboratories
The University of Texas
Austin, Texas
engines and serveral will pop up. Pinpoint comes to mind as one.
Mark
Original Message
From: "Matt Johnson" <matt@m...>
To: <basicstamps@yahoogroups.com>
Sent: Wednesday, January 09, 2002 7:13 PM
Subject: [noparse][[/noparse]basicstamps] Can this be done???
>
> We have a client that would like to track containers around a large
> manufacturing plant. These containers are the large and can be anywhere in
> the facility (its about a 1/4 mile area). Basically my questions is this.
> Can I get accurate positioning information using RF or other technology?
> possibly triangulation using 3 receivers? I dont know if you can do that.
> But GPS is too global and inaccurate to work in this small of an area.
> What do you guys think? I know LORAN technology works by triangulation,
> but I dont know if this project can even be done. Thanks for any help.
>
> - Matt
> matt@m...