Re: Deer camera for cars?

[Nick Hull <nhull@xxxxxxxxxxxxxxx>]

In article <1MednYlfI5Hsj3DeRVn-sQ@xxxxxxx>,
 "Robert Green" <ROBERT_GREEN1963@xxxxxxxxx> wrote:

> "Nick Hull" <nhull@xxxxxxxxxxxxxxx> wrote in message
> news:nhull-68BC27.15270410022006@xxxxxxxxxxxxxxxxxxxxxxxxxx
> > I have a trail c amera that takes pictured of deer walking down trails
> > in the woods.  I would like to use it to take pictures of vehicles
> > entering/leaving my driveway.  I thought the engine heat would trigger
> > the IR sensor but there is a problem.  Although the camera can sense a
> > deer 30' away it doesn't seem to be able to find my car at close range.
> > Any ideas?
>
> Reliable automobile sensing almost always seems to be done by buried
> sensors.  I've had my X10 Hawkeyes detect moving cars from 50 feet away -
> but not reliable.  Many cars scooted by undetected for reasons I never
> bothered to ascertain.  Maybe only well-warmed up cars triggered the PIR.
> I'd look toward putting the sensor about a foot off the ground and very
> close to the roadway.  A car's exhaust system and engine will be the warmest
> parts and they're down below.  Try keeping the sensor pointed north so that
> you minimize direct sunlight exposure.
>
> What kind of sensor is it?

PIR, "1.3 Megapixel".  I had the sensor low and the cars warm, but my
Saturn was never able to trigger it.  I did get ONE shot of the rear of
my wife's Caravan, presumably trigerred by the exhaust.

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