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Subject: 
Re: Soda-can challenge: beacons, tethers, etc. (was Re: Locating your position with the help of fixed be
Newsgroups: 
lugnet.robotics
Date: 
Wed, 4 Aug 1999 19:44:09 GMT
Original-From: 
Joel Shafer <joel@[stopspam]connect.net>
Viewed: 
1257 times
  
At 07:21 PM 8/4/99 +0000, you wrote:
I realize people have been talking about multiple cans, but Joel's message
http://www.lugnet.com/robotics/?n=3968 actually specified just one can, using
the words "find a [...] can", "pick up the can", and "[...] of the coke can".

You can find the complete rules here:
http://www.connect.net/joel/Challenge.html

There are three cans to retrieve.


As for making sure the whole area is covered, that's pretty tough. You need a
far more accurate type of position sensing, such as triangulation off multiple
fixed reference points. To do that with beacons that are pre-placed in the
room
would probably violate the conditions of the challenge.
Advanced knowledge that there are exactly three cans makes it easier.  You
don't have to make sure that the whole area is covered, you just have to
find the three cans.

Beacons are illegal, however you may use any non-active means to identify
location.  Someone suggested painting the floor with an increasing gradient
of darkness.


Joel Shafer    joel@connect.net

--
Did you check the web site first?: http://www.crynwr.com/lego-robotics



Message has 3 Replies:
  Re: Soda-can challenge: beacons, tethers, etc. (was Re: Locating your position with the help of fixed be
 
(...) clearer pictures of it? I am particularly interested in how the lasso works. (Is it a lasso?) Cheers, Hao-yang Wang (25 years ago, 4-Aug-99, to lugnet.robotics)
  Re: Soda-can challenge: beacons, tethers, etc. (was Re: Locating your position with the help of fixed be
 
Thank you for the pointer Joel. I didn't know about it because you didn't mention it in the original message thread (namely, the thread in which you originally proposed the challenge). I am adding a message to that thread now so that future (...) (25 years ago, 5-Aug-99, to lugnet.robotics)
  Re: Soda-can challenge: beacons, tethers, etc. (was Re: Locating your position with the help of fixed be
 
(...) Wouldn't that consist of "prior knowledge about the room"? (25 years ago, 5-Aug-99, to lugnet.robotics)

Message is in Reply To:
  Re: Soda-can challenge: beacons, tethers, etc. (was Re: Locating your position with the help of fixed be
 
(...) Some "secondary" reasons: 1) You may want to make sure that the entire area is covered. 2) If you bring back the soda cans one by one, you may want to resume your search from the location of the last soda can, instead of starting it all over. (...) (25 years ago, 3-Aug-99, to lugnet.robotics)

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