RE: BIK Sensor - who is interested?

[Paul Miller <pmiller@xxxxxxx>]

sounds like it could be better than PIRs but it would still have the
same problem - PETS. I really fancy something I could put on the dogs
collar to sense where they were and then eliminate them from the
lighting schedules etc.

PET PIRs in my experience don't work :(


-----Original Message-----
From: Ian B [mailto:I.Bird@xxxxxxx]
Sent: 26 March 2001 12:00
To: ukha_d@xxxxxxx
Cc: phillip.harris1@xxxxxxx
Subject: [ukha_d] BIK Sensor - who is interested?


The testing I have done so far has revealed:

1) Your house earth has to be good as this is used as a reference when
the
unit operates. (Ian's task number one - bury a large lump of stainless
somewhere and connect it to the house earth. In the short term I am
watering
my earth stake!!! Wifey thinks I am mad).

2) They are easier to set up and more accurate if you cover smaller
areas. A
large room would need more than one sensor - cool for location sensing.

3) You can have more than one overlapping as the aerial length
determines
the frequency (or something like that). Alter the aerial length slightly
and
there is no interferencebetween sensors.

4) They only detect presence within the aerials. When testing on the
kitchen
table I could virtually touch the aerial from outside with no effect.
Move
in between the wires and instant detection.

5) They detect in a sort of bubble shape between the two aerials. It
would
detect my hand quite high above the kitchen table (read test bench) but
lower as I got nearer the aerials themselves.

6) They detect presence in one of two ways which means you can detect
someone touching the ground or lying on the sofa but not both with the
same
detector. You would need two, one for each activity.

There is loads more info on the above points in the Bik documentation.

Having looked at the board I made I would like to get all the components
together before finalising anything. I suspect it would be worth my
while to
recreate this circuit in my design package and then reproduce the
boards. It
may even be worth getting a batch made 'properly' if there is enough
interest.

Personally I like them so, send me a note if you're interested and I
will
work with everyone to get some made.

Ian

-----Original Message-----
From: Phillip Harris [mailto:phillip.harris1@xxxxxxx]
Sent: 25 March 2001 16:14
To: I.Bird@xxxxxxx
Subject: RE: [ukha_d] BIK Sensor



Could you possibly run up a board for me too? Let me know what I owe you
for
doing so if you can. Have you have problems sourcing any components?
Occupancy sensing is proving to be a nightmare challenge!

I know you said you had one of these already ... how good are they for
sensing within a room? Do they have blind spots? Are they affected by
movement in other rooms (given that they're RF I believe).

> -----Original Message-----
> From: Ian B [mailto:I.Bird@xxxxxxx]
> Sent: 25 March 2001 14:33
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] BIK Sensor
>
>
> In the process of making on now. I'll report back when it is
> done. I am not
> planning to assemble it, just make the board. I will send it off to
Stuart
> Grimshaw for the pleasure of building it.
>
> I have no doubt we will post details of how it went laeter.
>
> Kenneth: if you would like one of them then let me know and I
> will make one
> for you. The more the merrier...........
>
> Ian
>
> -----Original Message-----
> From: Kenneth Watt [mailto:kennethwatt@xxxxxxx]
> Sent: 25 March 2001 10:32
> To: UKHA
> Subject: [ukha_d] BIK Sensor
>
>
> If anyone is having boards printed for this sensor please let me know.
>
> Ta
>
> Kenneth
>
>
>
>
>
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