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Re: OT: Muppets

From Joerg <news@analogconsultants.com>
Newsgroups sci.electronics.design
Subject Re: OT: Muppets
Date 2017-12-20 08:02 -0800
Message-ID <f9vfsdFf8hfU1@mid.individual.net> (permalink)
References (2 earlier) <p1c8dc$98e$1@dont-email.me> <f9tn95F32h0U1@mid.individual.net> <p1camf$lvq$1@dont-email.me> <f9tq3uF3k7dU1@mid.individual.net> <XnsA850D0E698EEEidtokenpost@69.16.179.23>

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On 2017-12-19 17:32, Steve Wilson wrote:
> Joerg <news@analogconsultants.com> wrote:
>
>> On 2017-12-19 16:25, rickman wrote:
>>> Joerg wrote on 12/19/2017 6:56 PM:
>>>> On 2017-12-19 15:46, rickman wrote:


[...]

>>>>> I recall riding the subway and looking up the tunnel I could just see
>>>>> the tail of a train that left the station and was preventing the next
>>>>> train from coming to pick us up.
>
>>>> Subways often have good automation in the US. It's the railroads that
>>>> are on
>>>> Flintstonian technology.
>
> [...]
>
>> Well, in this case we do have a clue how to do the job better. Since
>> more than half a century.
>
> I recall a system where the blocks were electrically isolated from each
> other.
>
> The resistance between the rails was monitored. When a train entered the
> block, the axles shorted the rails together and the resistance dropped.
> You could tell which direction the train was moving by watching the
> resistance increase or decrease. You could tell how long the train was by
> seeing how many blocks were shorted.
>
> This seems to be an ideal way to detect where the train is, which
> direction it is moving, and how fast.
>
> I wonder if this system was ever used, and what happened to it.
>

No idea. The German system works inductively and non-contact is usually 
the best method when you have to deal with contaminants such as oily 
sludge, snow, water and so on. Vandalism or dangerous pranks are another 
issue. Thing is, you also have to curb the number of false alarms 
because any delay has painful consequences.

-- 
Regards, Joerg

http://www.analogconsultants.com/

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OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-19 07:00 -0500
  Re: OT: Muppets amdx <nojunk@knology.net> - 2017-12-19 08:37 -0600
    Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-19 09:49 -0500
      Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-19 10:00 -0500
    Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-19 09:56 -0500
    Re: OT: Muppets John Larkin <jjlarkin@highlandtechnology.com> - 2017-12-19 08:53 -0800
      Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-19 12:20 -0500
        Re: OT: Muppets whit3rd <whit3rd@gmail.com> - 2017-12-19 14:27 -0800
          Re: OT: Muppets John Larkin <jjlarkin@highland_snip_technology.com> - 2017-12-19 15:24 -0800
          Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-19 18:39 -0500
        Re: OT: Muppets krw@notreal.com - 2017-12-19 20:53 -0500
          Re: OT: Muppets John Larkin <jjlarkin@highland_snip_technology.com> - 2017-12-20 10:08 -0800
            Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-20 13:19 -0500
              Re: OT: Muppets Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-12-20 10:32 -0800
                Re: OT: Muppets John Larkin <jjlarkin@highland_snip_technology.com> - 2017-12-20 12:11 -0800
              Re: OT: Muppets krw@notreal.com - 2017-12-20 21:52 -0500
                Re: OT: Muppets John Larkin <jjlarkin@highland_snip_technology.com> - 2017-12-21 10:56 -0800
                Re: OT: Muppets krw@notreal.com - 2017-12-21 19:24 -0500
  Re: Muppets "Tim Williams" <tiwill@seventransistorlabs.com> - 2017-12-19 16:48 -0600
    Re: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-19 18:08 -0500
      Re: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-19 18:26 -0500
  Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-19 15:01 -0800
    Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-19 18:46 -0500
      Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-19 15:56 -0800
        Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-19 19:25 -0500
          Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-19 16:44 -0800
            Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-19 20:01 -0500
              Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-20 07:59 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-20 13:07 -0500
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-21 10:31 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-21 14:33 -0500
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-21 12:00 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-21 16:06 -0500
                Re: OT: Muppets John Robertson <spam@flippers.com> - 2017-12-21 12:14 -0800
                Re: OT: Muppets whit3rd <whit3rd@gmail.com> - 2017-12-21 17:58 -0800
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-22 12:58 -0800
                Re: OT: Muppets whit3rd <whit3rd@gmail.com> - 2017-12-22 15:21 -0800
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-22 16:12 -0800
            Re: OT: Muppets Steve Wilson <no@spam.com> - 2017-12-20 01:32 +0000
              Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-19 20:40 -0500
              Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-20 08:02 -0800
                Re: OT: Muppets Steve Wilson <no@spam.com> - 2017-12-20 16:47 +0000
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-20 13:16 -0500
                Re: OT: Muppets whit3rd <whit3rd@gmail.com> - 2017-12-20 10:50 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-20 14:17 -0500
                Re: OT: Muppets krw@notreal.com - 2017-12-20 22:00 -0500
            Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-20 08:08 -0500
              Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-20 08:09 -0800
                Re: OT: Muppets John Larkin <jjlarkin@highlandtechnology.com> - 2017-12-20 09:17 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-20 13:26 -0500
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-21 10:37 -0800
                Re: OT: Muppets John Larkin <jjlarkin@highland_snip_technology.com> - 2017-12-21 10:58 -0800
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-21 11:17 -0800
                Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-20 14:14 -0500
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-20 14:18 -0500
                Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-20 14:48 -0500
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-20 16:04 -0500
                Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-20 16:55 -0500
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-20 16:59 -0500
                Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-20 18:30 -0500
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-20 19:40 -0500
                Re: OT: Muppets krw@notreal.com - 2017-12-20 22:03 -0500
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-21 10:41 -0800
                Re: OT: Muppets krw@notreal.com - 2017-12-20 22:03 -0500
                Re: OT: Muppets Michael A Terrell <mike.terrell@earthlink.net> - 2017-12-20 22:38 -0500
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-21 10:52 -0800
                Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-21 14:53 -0500
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-21 12:32 -0800
                Re: OT: Muppets krw@notreal.com - 2017-12-21 19:30 -0500
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-21 16:37 -0800
                Re: OT: Muppets krw@notreal.com - 2017-12-22 08:57 -0500
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-22 10:23 -0800
                Re: OT: Muppets Michael A Terrell <mike.terrell@earthlink.net> - 2017-12-22 17:23 -0500
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-22 14:53 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-22 18:57 -0500
                Re: OT: Muppets krw@notreal.com - 2017-12-22 20:10 -0500
                Re: OT: Muppets Michael A Terrell <mike.terrell@earthlink.net> - 2017-12-22 20:57 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-22 19:07 -0800
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-22 19:04 -0800
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-23 07:39 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-23 15:03 -0500
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-23 12:09 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-23 15:17 -0500
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-23 15:27 -0500
                Re: OT: Muppets krw@notreal.com - 2017-12-23 20:49 -0500
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-24 07:50 -0800
                Re: OT: Muppets krw@notreal.com - 2017-12-24 16:56 -0500
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-24 14:37 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-24 17:51 -0500
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-24 15:15 -0800
                Re: OT: Muppets krw@notreal.com - 2017-12-24 18:41 -0500
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-24 23:33 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-25 05:48 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-25 09:57 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-25 17:29 -0800
                Re: OT: Muppets Joseph Gwinn <joegwinn@comcast.net> - 2017-12-25 20:38 -0500
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-25 21:23 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-25 18:47 -0800
                Re: OT: Muppets whit3rd <whit3rd@gmail.com> - 2017-12-25 19:09 -0800
                Re: OT: Muppets Michael A Terrell <mike.terrell@earthlink.net> - 2017-12-26 00:33 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-26 15:13 -0800
                Re: OT: Muppets krw@notreal.com - 2017-12-25 22:10 -0500
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-25 07:18 -0800
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-25 18:25 -0800
                Re: OT: Muppets Jasen Betts <jasen@xnet.co.nz> - 2017-12-29 02:01 +0000
                Re: OT: Muppets krw@notreal.com - 2017-12-28 21:42 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-28 19:47 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-29 01:04 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-28 23:56 -0800
                Re: OT: Muppets krw@notreal.com - 2017-12-25 10:55 -0500
                Re: OT: Muppets Jasen Betts <jasen@xnet.co.nz> - 2017-12-28 21:41 +0000
                Re: OT: Muppets krw@notreal.com - 2017-12-24 18:39 -0500
                Re: OT: Muppets Joerg <news@analogconsultants.com> - 2017-12-24 07:46 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-24 12:23 -0500
                Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-25 21:57 -0500
                Re: OT: Muppets krw@notreal.com - 2017-12-23 20:47 -0500
              Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-20 13:31 -0500
                Re: OT: Muppets Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-12-20 18:36 +0000
                Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-20 14:10 -0500
                Re: OT: Muppets John Larkin <jjlarkin@highland_snip_technology.com> - 2017-12-20 12:13 -0800
                Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-20 16:41 -0500
                Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-20 16:42 -0500
                Re: OT: Muppets John Larkin <jjlarkin@highland_snip_technology.com> - 2017-12-20 14:16 -0800
                Re: OT: Muppets Steve Wilson <no@spam.com> - 2017-12-20 22:56 +0000
                Re: OT: Muppets whit3rd <whit3rd@gmail.com> - 2017-12-20 15:12 -0800
                Re: OT: Muppets John Larkin <jjlarkin@highland_snip_technology.com> - 2017-12-20 15:26 -0800
                Re: OT: Muppets Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-12-20 23:37 +0000
                Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-20 18:42 -0500
                Re: OT: Muppets whit3rd <whit3rd@gmail.com> - 2017-12-20 16:26 -0800
                Re: OT: Muppets John Larkin <jjlarkin@highlandtechnology.com> - 2017-12-21 08:45 -0800
                Re: OT: Muppets Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-12-21 09:29 +0000
                Re: OT: Muppets John Robertson <spam@flippers.com> - 2017-12-20 15:30 -0800
                Re: OT: Muppets krw@notreal.com - 2017-12-20 22:08 -0500
                Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-20 18:36 -0500
                Re: OT: Muppets krw@notreal.com - 2017-12-20 22:09 -0500
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-20 15:28 -0500
                Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-20 14:02 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-20 16:33 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-20 21:09 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-20 22:55 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-21 09:38 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-21 18:06 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-21 21:59 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-22 02:56 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-22 11:45 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-22 18:02 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-22 22:39 -0500
                Re: OT: Muppets krw@notreal.com - 2017-12-22 23:01 -0500
                Re: OT: Muppets Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-12-23 09:05 +0000
                Re: OT: Muppets krw@notreal.com - 2017-12-23 10:04 -0500
                Re: OT: Muppets Michael A Terrell <mike.terrell@earthlink.net> - 2017-12-23 14:00 -0500
                Re: OT: Muppets krw@notreal.com - 2017-12-23 20:51 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-23 06:15 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-23 14:38 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-23 17:43 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-23 21:25 -0500
                Re: OT: Muppets Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-12-24 09:58 +0000
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-24 08:29 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-24 06:06 -0800
                Re: OT: Muppets Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-12-24 17:53 +0000
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-24 03:41 -0800
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-24 09:12 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-24 15:32 -0800
                Re: OT: Muppets Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-12-23 08:52 +0000
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-23 14:40 -0500
                Re: OT: Muppets Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-12-23 19:49 +0000
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-23 14:55 -0500
                Re: OT: Muppets Tom Gardner <spamjunk@blueyonder.co.uk> - 2017-12-23 20:03 +0000
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-23 17:53 -0800
                Re: OT: Muppets Jasen Betts <jasen@xnet.co.nz> - 2017-12-22 20:49 +0000
                Re: OT: Muppets rickman <gnuarm@gmail.com> - 2017-12-22 16:26 -0500
                Re: OT: Muppets whit3rd <whit3rd@gmail.com> - 2017-12-22 15:36 -0800
                Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-23 08:19 -0500
                Re: OT: Muppets bill.sloman@ieee.org - 2017-12-23 06:30 -0800
                Re: OT: Muppets bitrex <bitrex@de.lete.earthlink.net> - 2017-12-23 15:09 -0500

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