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1  Using Arduino / Sensors / Re: Sensing people standing around a piece of artwork. on: February 13, 2013, 08:20:35 pm
The pressure sensors on the floor would work, I was just hoping the artwork could be self contained and more elegant (since pressure pads on the floor would tend to stand out).  Perhaps if I could disguise some pads to appear not a part of the artwork then the 'magic' of the installation can be returned. 

I don't know if motion sensors would work, since theoretically after people walk into the room they would stop and look at the piece for a couple of minutes.  What I want to sense is the amount of people, not the amount of motion within the space.

Perhaps some kind of sonar??

Summary: Looks like I need to do some testing. 

Thanks for your help so far!
2  Using Arduino / Sensors / Sensing people standing around a piece of artwork. on: February 13, 2013, 12:57:26 am
Hello,

I am working on an art installation that reacts to the number of people viewing it.  I need it to somehow determine the amount (the specific number is irrelevant) of people that stand in front of the object.  The highest number of people viewing the piece at any given time should be between 5-10, at a distance no greater than 2-3 meters.

So far I am thinking of using a MLX90614ESF-AAA Infrared Temperature Sensor 90° FOV (~$25) to determine the average temperature and as people walk up to the installation their body heat will be detected and the art will react accordingly.  I am not exactly sure how this sensor works in the real world and perhaps this more expensive alternative would be better: MLX90620   FIRray:16X4 Far InfraRed Array (~$80)

If anyone has any suggestions on if either of these would or wouldn't work or if I need to go about a completely different method, you opinion is Greatly appreciated!!

Thanks!
-Greg
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