Article View: sci.electronics
Article #14301Re: measuring vehicle speed
From: chuck smith
Date: Mon, 17 Jun 1991 22:09
Date: Mon, 17 Jun 1991 22:09
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1517 bytes
gt0297a@prism.gatech.EDU (Tim Drury) writes: >is there an accurate, *cheap* method of measuring vehicle speed without >measuring off the front or rear wheels? this is to be used in a proto- >type traction control system on a race car. the speed of the rear >wheels will be compared with the true vehicle speed to determine if >traction is lost. since the front wheels will rotate at differing speeds >in turns they can't be used. >is there an easy way to use infrared doppler or something like it? The easiest way to impliment a traction control is to measure vehicle acceleration and compare it to tire acceleration. This is in essence what ABS and other current traction control systems do. Its not too cheap though. >-tim drury >gt0297a@hydra.gatech.edu -- ------------------------------------------------------------------------ chuck smith U. of Illinois The purpose of diplomacy is cwsqbm@uiuc.edu at Urbana-Champaign is to prolong a crisis - Spock ------------------------------------------------------------------------
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arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!news.cs.indiana.edu!ux1.cso.uiuc.edu!csmithReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!news.cs.indiana.edu!ux1.cso.uiuc.edu!csmith From: csmith@ux1.cso.uiuc.edu (chuck smith) Newsgroups: sci.electronics Subject: Re: measuring vehicle speed Keywords: car speed Message-ID: <1991Jun17.220955.12742@ux1.cso.uiuc.edu> Date: 17 Jun 91 22:09:55 GMT References: <31487@hydra.gatech.EDU> Organization: University of Illinois at Urbana Lines: 21