Re: Simple signal transmission using long steel pipe
- From: John Larkin <jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 11 Apr 2006 19:45:52 -0700
On 11 Apr 2006 01:29:04 -0700, "paulus9528@xxxxxxxxxxx"
<paulus9528@xxxxxxxxxxx> wrote:
I am a mechanical/hydraulics engineer with an application which may be
more suited to you guys' expertise. What I want to do is transmit a
signal from a remote (up to 5km) device through a long piece of steel
pipe. The remote device incorporates a sensor which produces a simple
signal (on/off) which I would like to detect remotely. Is this feasible
to transmit a sigal (electrical or sound) without any signal boosters
etc.? If this is in no way feasible I have other solutions but this
would make a real neat, simple and cheap solution. Your advice/help is
much appreciatd.
If the pipe can be grounded at both ends, a current transformer could
induce a signal at one end, and another could pick it up at the other
end. Leakage to earth along the way would cause losses, but I suspect
it's workable at several km.
Not hard to try: a couple of regular metering-type CTs, a signal
generator and an audio amp at the drive end, another amp and
headphones to receive.
John
.
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