Sensing people indoors.

February 19, 2009 by stanza Leave a reply »

I  have been looking at different solutions for sensing people indoors so I have pasted this in below.

“Some suggestions for indoor sensing. Each team must build a sensing system that can perform dead reckoning as people walk through a 10m x 10m arena, which will be located in the poster/demo session of the conference. The goal is to estimate the final position of the person given the initial position. Teams can use up to 5 body sensors, which may include accelerometers, gyroscopes, magnetometers, etc. Each team can also setup at most 2 sensors in or around the arena, but predefined paths must remain unobstructed for people to walk, as shown in the diagram below.  The predefined paths will not be revealed until the day of the competition, and will be marked with tape. Examples of sensors placed in the arena might include passive infrared motion sensors, active infrared break beams, ultrasound, dopplar radar, weights sensors, etc. These sensors can be useful for on-line calibration of the body sensors. The sensor systems have three restrictions: 1) no system may have data cables more than 12 inches in length* 2) no system may impede the motion of the person being sensed, and 3) no system may use more than 7 pixels in total, eg. no cameras with more than 7 pixels, and no more than 7 single-pixel** sensors. Signal emitters will be permitted, as long as they do not interfere with other teams’ sensors and as long as they do not help the system emulate more than seven pixels (see below*). Each time a person walks a path with a team’s sensors, that team will be required to update a server with its current position estimate at least once per second. The path estimate will be visualized and projected onto a wall.”



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