[OpenTRV-dev] Anatomy of a TRV

Thu Mar 28 09:55:09 GMT 2013

The TRV certainly isn't a great place for an occupancy detector; but
ultrasound Doppler-shift / vibration detectors might just about work on a
TRV.  (although, of course, these would need to be an optional extra as
they would significantly increase the cost... and vibration detectors might
get confused by vibrations transmitted through the copper pipework: maybe
it'd make more sense to detect human voices)

On 28 March 2013 09:41, Stuart Poulton <EMAIL ADDRESS HIDDEN> wrote:

> I don't think occupancy detection would work on the TRV, given the
> location of most TRV's
> Occupancy detection isn't the easiest thing to accomplish it has long been
> the holy grail of home automation.
> Stuart
> On 28 Mar 2013, at 09:37, Jack Kelly wrote:
> > On the topic of IR / ultrasound:
> >
> > Any sort of occupancy detection built into the TRV would be very
> interesting for a future design iteration, IMHO.  IR / ultrasound / CO2
> (*very* expensive!) / vibration detector (microphone with low pass filter)
> etc.
> >
> > In general, my hunch is that only the very geekiest folks will ever
> bother to explicitly program an efficient room-by-room heating schedule so
> anything we can do to automate the generation of a room-by-room schedule
> could significantly widen the appeal of the system (conditional on the
> system not frightening users: there's a real risk that people will worry
> that they're being spied on).
> >
> > (BTW, one of my MSc students will almost certainly be doing her summer
> project on room-by-room occupancy prediction based on PIR and individual
> appliance power data: not as easy as it might first appear!).
> >
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