Subject:
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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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Tue, 9 May 2000 20:17:20 GMT
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Original-From:
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FTHOMPSON9@AOLihatespam.COM
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Viewed:
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699 times
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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 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 with precision angular encoders mounted on them. Then
take the angles measured from each sensor and the code number for that
sensor. Use the code number to look up the beacon location from ROM. Use
the angles measured and the known position of the beacons to deduce the
robots location.
If you are reluctant to go attaching LEDs to the walls of your house, you
could build a box containing several IR Lasers. Modulate the lasers the same
as you would for LED beacons. Shine the lasers at various points on the
walls (where the beacons should be) and the scattered laser spot will be your
beacon source.
Just a thought,
Pherd
Currently in Pensacola FL soon Hartford CT
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Message has 2 Replies:
 | | Re: Household Positioning System Re: DGPS
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| Cool idea. Do you have it working? Or do you have a schematic that is somewhat working? If so, I want to test out how accurate it will be. It will be fun to use the LED as landmarks in the building. -- Ray <handyboard@media.mit.edu> wrote in message (...) (24 years ago, 10-May-00, to lugnet.robotics.handyboard)
| | | Re: Household Positioning System Re: DGPS
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| (...) 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 (...) (24 years ago, 11-May-00, to lugnet.robotics.handyboard)
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