#SENSORs# ..help with sensor problems! Thank you to all that can assist

Nick · 2004-08-25T13:09:48+00:00

Hi guys,I know this is a robotics ng but I was hoping you could still provide some help as your area of expertise is really what I'm after.I'm a 4th year interactive design student working on a project which involves the use of sensor triggers. The triggers are used to signal the interactivity of the target and a device (intelligent lighting, audio, projections, and environmental control systems) but we are having huge problems finding potential sensors that can do what we want. Ideally, we would like to track individuals or groups through a space 90m long, 9m wide, and 10m high (essentially a tunnel) and interact with these bodies as they move through the space. It is a public space so the sensors need to be mounted on the walls high enough to be out of reach or incased in a unit to protect them.At first we looked at simple infrared beams like most retail stores use but this would not give us the resolution required in the interactivity elements. We ultimately want to achieve a system in which we can return to a server system a coord (x,y) value of every body in the space. We were also looking at using basic sensor mats on the floor but the client is not happy with this and prefers the sensors to be largely no visible.If anyone has any suggestions on how we can achieve this or come close even I very much like to hear your opinions. The budget is not really a concern at this point as the clients are willing to spend but of course there will be a limit but fortunately they do realize what they are asking and consequently have already considered the potential for an expensive costing to develop this tracking system. Any help would be greatly appreciated. Thank you.Kind regards,Nick.

Aug 25, 2004 21 Replies

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Mitch Berkson 21 years ago

This would be the step where the magic occurs?

Mitch Berkson

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dan michaels 21 years ago

Actually, I don't think this would be as difficult as you think. You set up a global map [ie, continuous grid] of the floor involving all of the cameras, and you simply place each blob [moving object] into a grid cell on the map, along with its characteristics [size, color, etc]. Then you test for consistency [in terms of charactersitics plus position plus movement vector] as the blob moves from one grid cell to the next with time.

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