Re: Inexpensive Motion detection/monitoring a doorway

People come in thru the door and have a wall forcing them to turn right. I
was planning on putting the sensor so it "see's" across the doorway and up
to the wall. 90 degree field of view if possible. And only need about 4
feet in depth. I do NOT want it to trigger when somebody walks past my door
in the common area hallway. Not triggering in my store would be good, but
if I've only got a light on/off, it wont bother me as I'll be in the public
area and will not be able to see it.

I found an article at
http://www.videomotiondetectors.com/manuals/VMDtalk.htm that talks about
video motion detection and was planning on reading it at lunch.

Really appreciate everybody's insights on this.

Bob Crothers
www.BJsBariatrics.Com
------------------------------------------
"What part of 'Thou shalt not…' didn’t you understand?"
- Billboard in Las Vegas



On Fri, Dec 16, 2011 at 11:18 AM, Douglas Handy <dhandy@xxxxxxxxx> wrote:

Bob,

Smack goes the hand on my forehead! In my looking around I saw a couple

of

these and it would work. Set a light on top of the CPU tower and I'd

see &

notice it from anywhere in my office!

When you position a passive infrared sensor, be sure to place it where
the traffic does not come straight toward the sensor, but instead
moves across it. Cheap passive IRs tend to not notice straight on
changes until they are very close. If it is across for the doorway,
you may have better luck by turning the sensor 90 degrees so its field
of vision changes axis.
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