Re: Reason why DC mag field disturbs communications on a train

On Tue, 17 Mar 2009 13:36:08 +1100, Sylvia Else
<sylvia@xxxxxxxxxxxxxxxxxxx> wrote:

Jamie wrote:
Archimedes' Lever wrote:

On Mon, 16 Mar 2009 20:35:43 -0500, Jamie
<jamie_ka1lpa_not_valid_after_ka1lpa_@xxxxxxxxxxx> wrote:


Quick History.

Place of employment does cross linking processing via irradiation.

5 years ago, I designed a counter acting magnetic field generator
along the back wall of one our units. Reason for being is, behind this
wall is the outside which has a road way where fork tucks and other
vechicals drive, just after that, a rail way. When trucks or trains
go by or stop in that area, it creates enough disturbance to cause the
irradiation beam to miss align and causes doscemity changes and
heating of the scan horn. ( not alot but enough to alter spec's)

To fix this, we designed a small wall on the out side of the vault
with an array of coils connected to multi channel DC amps. These arrays
have Hall sensors in them to monitor the change and maintain a fixed
gauss.

Now, the problem. Apparently some communication equipment on the train
gets desensitized when they stop at that location, they need to move
up/down the tracks to correct the issue which some times isn't fun
for them.

My question is, what kind of equipment would a train have that would
get effected from a DC magnetic field ?



http://webpages.charter.net/jamie_5";



The tracks have sensors for the trains at every rail crossing at a
roadway, and at every station. There are also wireless networks in place
that use proprietary protocols, which may be more susceptible. Seems
unlikely though, considering the industry, that they would have such a
vulnerability.
You wouldn't think so how ever, we do have a crossing point just a few
feet up from there. They wouldn't elaborate as to what type of equipment
was getting bothered,

In which case, it's not your problem. Ignore them until they get more
cooperative.

Sylvia.


That carries about as much responsibility as the idiots at AIG handing
out $165M in bonuses on our dime.
.

Relevant Pages

  • Re: Reason why DC mag field disturbs communications on a train
    ... Place of employment does cross linking processing via irradiation. ... I designed a counter acting magnetic field generator ... along the back wall of one our units. ... When trucks or trains ...
    (sci.electronics.design)
  • Re: Reason why DC mag field disturbs communications on a train
    ... Place of employment does cross linking processing via irradiation. ... wall is the outside which has a road way where fork tucks and other vechicals drive, just after that, a rail way. ... what kind of equipment would a train have that would get effected from a DC magnetic field? ... Some trackside sensors for passenger trains use LF 10's of KHz coils to pace their position on the track. ...
    (sci.electronics.design)
  • Re: Reason why DC mag field disturbs communications on a train
    ... Place of employment does cross linking processing via irradiation. ... wall is the outside which has a road way where fork tucks and other vechicals drive, just after that, a rail way. ... what kind of equipment would a train have that would get effected from a DC magnetic field? ...
    (sci.electronics.design)
  • Re: Reason why DC mag field disturbs communications on a train
    ... Place of employment does cross linking processing via irradiation. ... wall is the outside which has a road way where fork tucks and other vechicals drive, just after that, a rail way. ... When trucks or trains ... what kind of equipment would a train have that would get effected from a DC magnetic field? ...
    (sci.electronics.design)
  • Re: Reason why DC mag field disturbs communications on a train
    ... Place of employment does cross linking processing via irradiation. ... wall is the outside which has a road way where fork tucks and other vechicals drive, just after that, a rail way. ... what kind of equipment would a train have that would get effected from a DC magnetic field? ... Some trackside sensors for passenger trains use LF 10's of KHz coils to pace their position on the track. ...
    (sci.electronics.design)