Re: measuring distance between two cars using infrared circuits

From: Anthony Fremont (spam_at_anywhere.com)
Date: 01/24/05 

Date: Mon, 24 Jan 2005 04:12:22 GMT

"keith" <krw@att.bizzzz> wrote

> > I disagree. In the grand scheme of a signal that's usually taking
tens
> > of mS to make its journey, a few uS of turnaround overhead is not,
IMO,
> > significant nor does it have to be an unknown.
>
> We're talking abotu cars a few tens of feet apart. Thus it's
nanoseconds,
> and *any* turn-around in the transponder is *significant*.

Mac originally wrote:

>>> Ultrasound might work well. You could have a transponder on the back
>>> of the car in front and a range-finder on the front of the car in
>>> back.

This portion of the thread is about using ultrasound transponders, not
radar or IR. Sound doesn't get very far in a nS.

Relevant Pages

  • Re: measuring distance between two cars using infrared circuits
    ... >> of mS to make its journey, a few uS of turnaround overhead is not, ... radar or IR. ... Sound doesn't get very far in a nS. ...
    (sci.electronics.design)
  • Saw Journey in Concert last night
    ... Journey opened the show which was great, ... And I didn't really like the sound of his drums ... But Def Leppard just didn't make ... no wonder they recently named Milwaukee the drunkest ...
    (rec.music.makers.percussion)
  • Re: Late afternoon update on Joe 22/10/2009
    ... What a journey. ... Satnav to the shortest route and was taken the tourists route of ... Vid plays ok in Media Player but sound is a little quiet. ...
    (uk.people.silversurfers)
  • should this be corrected?
    ... beginning for the journey to the Usher House. ... 2- The sound, sense, emotion and views are used for describing the ...
    (alt.usage.english)
  • Re: should this be corrected?
    ... 1-The sound, sense, emotion and views used for describing the starting ... point for the journey to the Usher House. ... starting point of the journey to the House of Usher. ...
    (alt.usage.english)
Loading