Subject:
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Re: Household Positioning System Re: DGPS
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 11 May 2000 18:19:42 GMT
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Viewed:
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878 times
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In lugnet.robotics.handyboard, FThompson9@aol.com writes:
> In a message dated 05/08/2000 6:25:33 PM Central Daylight Time,
> willb@selway.umt.edu writes:
>
> > Forget global. We need to devise HPS -- Household Positioning System!
>
>
> How about a beacon system. Each room can have 3 or so beacons ...
Some years ago i wrote the presentation part of a prototype system based on
ultrasonic beacons.
the beacons were plugged into wall outlets and transmitted their ID:s, i
can't remember the details but the beacons were syncronized by detectecting
the zero crossing of the 220V 50Hz. i think the system gave the position
within 1 mm to 1 cm . the prototype system was 2D (x,y) but i see no problem
using it for 3D (x,y,z). Just thought i should mentioned it ...
-Anders
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Message has 1 Reply:
 | | Re: Household Positioning System Re: DGPS
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| Actually, I am going in that direction. I was trying to use the ultrasonic transducer to produce a signal and then use two detector to triangulate the location. That wasn't much of a success. I will need to redo the parts. I want to try using more (...) (25 years ago, 12-May-00, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | Household Positioning System Re: DGPS
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| (...) How about a beacon system. Each room can have 3 or so beacons high on the wall. Each beacon flashes at 38Khz and each beacon modulates this 38KHz with its own personal code. The top layer of your robot would have 3 or 4 directional sensors (...) (25 years ago, 9-May-00, to lugnet.robotics.handyboard)
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