Basically, what I'm looking at is confined to a building (but needs to not depend on the dimensions of the building, etc) Essentially, I'm working on developing a positioning system for the body (ie, motion capture for 3d animation) I know that many of the top end ones use fiber optics, but I'd rather not use fiber as there is a possibility for breaking, etc. I'm trying to keep the cost down and to have it be able to run off of a battery pack. As for resolution, it doesn't have to be too accurate.. down to a few inches or so. Distance will be the confines of the human body. Thanks :) -r- P.S. typo with forgetting the ":" sorry :) -----Original Message----- From: Russell McMahon [mailto:apptech@CLEAR.NET.NZ] Sent: Wednesday, August 16, 2000 1:57 PM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [OT]: generating low power electrical fields for detection... More info needed (resolution, distances, environment etc but if size, power consumption and cost are acceptable then differential GPS can provide a resolution to cm to mm Note - I don't think you had a colon after the [OT]. Russell McMahon _____________________________ What can one man* do? Help the hungry at no cost to yourself! at http://www.thehungersite.com/ (* - or woman, child or internet enabled intelligent entity :-)) From other worlds: www.changingourworld.com www.easttimor.com www.sudan.com -----Original Message----- From: Russell Hay To: PICLIST@MITVMA.MIT.EDU Date: Thursday, 17 August 2000 05:20 Subject: [OT] generating low power electrical fields for detection... >I've got a problem where I need to find the position of a mobile unit in >relation to the base unit. I was thinking about >using a very low power, low frequency electrical field and then having the >mobile unit sense this field and determine where it is in relation to this >field. I'm trying to find a way to do this with a single electrical field. >Does anyone have any references for this type of thing? Another idea that I >was tossing around was using a Flux-Gate sensor to detect changes in the >magentic field of the earth, and calibrating the mobile unit at the base >before the mobile unit is allowed to move. This would allow (with a bit of >math) to determine the position and orientation (using 3 fgs) relative to >the base unit. Any input would be greatly appreciated. > >Thanks > >-r- > >-- >http://www.piclist.com hint: The PICList is archived three different >ways. See http://www.piclist.com/#archives for details. > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.