Re: Occupancy Detection

["Frank Mc Alinden" <fmcalind@xxxxxxxxxxxxxx>]

Hi Nigel

>The idea of a PIC to limit the number of
> 'detections' to one every ten minutes also makes a lot of sense.

It sure does ......i have tried to detect movement rather than lack of
movement and it means a lot of scanning . Due to this i was missing probe
status requests via the i/o interface....;-(......Im now considering  Jon,s
approach....incorporating a phyiscal  timer(20 minutes)  into each pir
probe,so the pir retriggers the timer everytime it detects , and get
Homevision to probe the pirs probes every 5 minutes and if the probe is
detected off then turn off  lites in that zone etc.....

Frank


----- Original Message -----
From: "Nigel Giddings" <nigel@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Saturday, November 20, 2004 6:46 PM
Subject: RE: [ukha_d] Occupancy Detection


>
> Jon,
>
> I didn't realise these were so 'easy' to get hold of...
>
> I wanted to connect these to Dallas 1 wire switches (DS2405?) but
wasn't
> sure how to go about this. The idea of a PIC to limit the number of
> 'detections' to one every ten minutes also makes a lot of sense.
>
> The idea is then to use a Temp08 to connect the 1 wire bus to
Homeseer.
>
> Nigel
>
> -----Original Message-----
> From: Jonathan Twyford [mailto:ukha@xxxxxxx]
> Sent: 19 November 2004 22:15
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] Occupancy Detection
>
>
>
>             Frank
>
>             These can also be purchased from maplins (YD85G) at 7.99
> each. I have tried these and found them very good.
>
>             Cheers
>
>             Jon
>
> -----Original Message-----
> From: Frank Mc Alinden [mailto:fmcalind@xxxxxxx]
> Sent: 19 November 2004 21:22
> To: ukha_d@xxxxxxx
> Subject: [ukha_d] Occupancy Detection
>
> Hi All
>         Im currently using my security pirs for Security  and
Occupancy
> detection but find that they are not responsive enough for Occupancy
> detection  at times .....Im thinking of using a little 5v pir head 
and
> connect it into my Probe system (no need for further wiring)....The
> Probe system normally reports the status of Probes when
"Requested" this
> obviously isnt suitable ...so i intend to dedicate Probe 6 in each
Zone
> for "Occupancy Pir" and then continually Poll probe 6 on
each zone and
> report back to Homevision / xPL via the i/o and serial interfaces the
> status of each pir.... and hopefully i will have a more reliable
> Occupancy detection system....So im hoping the little pir heads are
> quite sensitive..
>
> Check out the link for the little pir heads...under security and
> survellience part number k76 http://www.ozitronics.com/
>
> More Soon
> Frank
>
>
>
>
>
>
>
>
>
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