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

Archimedes' Lever wrote:
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.

It seems a fair response. There doesn't appear to be a safety issue involved, just cost and incovenience for the train operator.

If the latter isn't willing to reveal the nature of the equipment that might be affected, then it compromises the OP's ability to understand what he might have to do to obviate the problem, or even whether its his equipment that's causing the problem. The OP has no reason to go to extra trouble (and expense, no doubt) in the face of an obstructive train operator.

Sylvia.
.

Relevant Pages

  • 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. ... 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. ... I designed a counter acting magnetic field generator ... what kind of equipment would a train have that would ...
    (sci.electronics.design)
  • 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 ... what kind of equipment would a train have that would ...
    (sci.electronics.design)
  • Re: Eurostar breakdowns.
    ... is causing these Eurostar trains to break down in the Channel Tunnel ... Snow built up on ventilation panels for equipment compartments. ... When the train has run through the tunnel, ... Flights across Europe and at least one to India were cancelled. ...
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