RE: PIR Options

["Amar Nagi" <amar@xxxxxxx>]

how are you guys interface your PIRs to X10 ? or X10 controller ? or
Computer ?


      -----Original Message----- 
      From: psghome2002 [mailto:psghome@xxxxxxx]
      Sent: Thu 18/07/2002 12:00 
      To: ukha_d@xxxxxxx 
      Cc: 
      Subject: Re: [ukha_d]PIR Options
      
      

      The new PIR sounds interesting - I would
imagine it's being designed
      to address the 'occupancy sensing'
issue???
      
      --- In ukha_d@y..., "Frank Mc
Alinden" <armagh@b...> wrote:
      > Hi All
     
>             
I have used many different pir sensors over the years
      as  i
      > worked  on and off in the security
industry . My personal first
      choice is
      > Pulnix sensors and secondly and also
IMO a great detector is the
      Alarmcon
      > 210 sensor and 220 these are now
outdated i think the new ones are
      called
      > 310 + 320 etc but  i used lots of
them in large commercial stores
      here in
      > Melbourne . Also i was speaking via
email to the President of
      Pulnix America
      > ( a Scot) and he said that they were
developing a pir for the HA
      market he
      > wouldnt elaborate but will let me know
when its ready. If your
      interested i
      > have a couple of pics on my site 
and a link to pulnix sensors. I
      also
      > purchase my cctv stuff from them.
www.users.bigpond.com/armagh/
      >
      > Frank Mc
      > ----- Original Message -----
      > From: "psghome2002"
<psghome@h...>
      > To: <ukha_d@y...>
      > Sent: Thursday, July 18, 2002 7:22
PM
      > Subject: Re: [ukha_d]PIR Options
      >
      >
      > > I trialled a few different PIR's
for the same use (there's been a
      > > lot of discussion about this on
here before). I wanted
      the 'perfect
      > > PIR' that had to meet the
following criteria:
      > >
      > > 1) Quick triggering
      > > 2) Stable so as not to give false
alarms when used as security
      PIR
      > > 3) Looks good
      > > 4) Ability to turn On/Off LED
      > > 5) Interchangeable Lens for
wide/curtain mode detection.
      > >
      > > Point 1 is normally part dealt
with by user selectable 'pulse
      count'
      > > i.e. how many detection pattern
'beams' need to be broken to
      trigger
      > > and the internal logic used by the
detector (and how quick it
      is).
      > > Generally it is best to go for a
sensor that allows a pulse
      count of
      > > between 1 and 4, although most
will start at 2 for stability (low
      > > false-alarm) reasons.
      > >
      > > I must say that I have still not
found the ideal sensor - I have
      a
      > > combination of:
      > >
      > > Alarmcom IR120C - look really
good, use great 'black mirror'
      > > technology (cutting down
susceptibility to sunlight and other
      > > unwanted radiation) and are very
stable but a little slow to
      trigger
      > > + they are fairly cheap trade.
      > >
      > > Pyronix Magnum Ultra - (existing
PIR's in my house) - OKish
      looking,
      > > seem quite stable and have
selectable 1/2/3 pulse count making
      it a
      > > bit quicker to trigger when on
1.
      > >
      > > Optex RX-40QZ - Recommended by
Comfort but I've not tried this
      yet -
      > > only 2/4 pulse count and detection
area doesn't look very dense.
      > >
      > > I think the detection area density
is also important. This is the
      > > pattern of 'detection beams' that
spread out from the sensor and
      how
      > > closely they are spaced. The lower
the density, the further you
      will
      > > have to move to trigger the sensor
(depending on pulse count).
      This
      > > is especially important if you
want to detect occupancy in, say,
      the
      > > living room where you may sit on a
sofa for longish periods of
      time.
      > > A high-density pattern and propper
alignment of the PIR will help
      > > here although you cannot guarantee
that the sensor will pick up
      > > small movements.
      > >
      > > Someone mentioned a dual tech
sensor on here a while ago.
      Generally
      > > these are no good as their trigger
time is pretty poor (long).
      They
      > > use a combination of IR detection
and microwaves. This particular
      > > sensor gave separate outputs for
both sensors, allowing the
      > > (quicker) microwave technology to
be used on it's own. The
      microwave
      > > bit can be difficult as it will
apparently sense through walls
      > > (although I've not tried one) - so
siteing is important. Anyone
      use
      > > these - I'd love to hear if it's
successful.
      > >
      > > Paul.
      > >
      > > --- In ukha_d@y..., "Amar
Nagi" <amar@a...> wrote:
      > > >
      > > > I have homeseer, ocelot and I
want to set up sensors around my
      > > flat to
      > > > indicate when a room is
occupied. What are my options ? I get
      a bit
      > > > confused
      > > > by the range of different
sensors (Pir)
      > > >
      > > > Any recommend anything ? I
don't really want to go for the RF
      x10
      > > route
      > > >
      > > > Ps sorry I used the wrong
subject line b4.
      > >
      > >
      > >
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      > >
      
      
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