[Homeroast] Article on automated system of coffee roasting based on crack sounds

Ben Treichel J.W.Bullfrog at gmail.com
Mon Jun 16 09:53:40 CDT 2014


It is. btw, I'm an engineer.


On Mon, Jun 16, 2014 at 9:36 AM, David Rossell <davidjohnrossell at gmail.com>
wrote:

> But some beans barely make a cracking sound at all, and others are quite
> pronounced.  I swear, sometimes in the Behmor, it's not so much a crack as
> a phht sound.  : )
>
> Could be a tough engineering problem!
>
>
>
>
> On Mon, Jun 16, 2014 at 10:34 AM, Barry Luterman <lutermanb at gmail.com>
> wrote:
>
> > Yes or to put it another way. You are measuring the actual event (crack)
> > rather than a measure of a related event (temp) and then inferring about
> > the evem from the measurement.
> >
> >
> > On Mon, Jun 16, 2014 at 6:26 AM, Ben Treichel <J.W.Bullfrog at gmail.com>
> > wrote:
> >
> > > Different purpose, since at best we measure the temp of the bean mass,
> > and
> > > at worst the input air temp, The sound of the crack indicates a
> roasting
> > > event, which is not necessarily temp dependent; time and time is a
> better
> > > indicator.
> > >
> > >
> > > On Mon, Jun 16, 2014 at 8:15 AM, David Rossell <
> > davidjohnrossell at gmail.com
> > > >
> > > wrote:
> > >
> > > >
> > >
> >
> http://scitation.aip.org/content/asa/journal/jasa/135/6/10.1121/1.4874355
> > > >
> > > > Why that would be better than a thermometer to measure bean
> > temperature,
> > > > I'm not sure . . .
> > > >
> > > > David
> > > >
> > > > --
> > > > David Rossell
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>
> --
> David Rossell
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