[OpenTRV-dev] Ultrasound via radiator pipes

[Damon Hart-Davis]

Indeed.

Maybe you'd only need enough length of metal to get good coupling into the water?

Rgds

Damon


On 2 Apr 2013, at 10:39, Jack Kelly wrote:

> We have quite a few plastic pipes in our ch system.
> 
> On 1 Apr 2013 17:40, "Damon Hart-Davis" <EMAIL ADDRESS HIDDEN> wrote:
> How would the pipes themselves do as the transfer medium if all metal?  Mine somehow convey all manner of interesting audible noise.
> 
> The alternative might be infra-sound pipe-knocking with tiny hammers!  B^> / 2
> 
> Rgds
> 
> Damon
> 
> 
> On 1 Apr 2013, at 17:38, Mike Stirling wrote:
> 
> > On 01/04/13 16:01, Damon Hart-Davis wrote:
> >> Hi,
> >>
> >> BTW, how idiotic is my wild idea of using ultrasound (as an alternative to RF) to have the nodes communicate over the water-filled radiator pipes back to the boiler node?
> >>
> >> Rgds
> >>
> >> Damon
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> > Probably doable, but from my admittedly very limited acoustics experience I would imagine coupling into the water through the pipes would not work very well (the pipes are rigid).  The transducer would need to be in direct contact with the water for maximum power transfer, which would not be an easy retro-fit.
> >
> > Mike
> >
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