[OpenTRV-dev] Ultrasound via radiator pipes

[Mike Stirling]

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