LOW POWER, INEXPENSIVE VELOCITY DETECTION USING A PIR ARRAY
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United States of America Patent
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app pub date -
Jul 7, 2014
filing date -
Jan 5, 2011
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Abandoned
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Abstract
Methods and systems may include a system including a first passive motion sensor having a lateral field of view with a first edge and a second passive motion sensor having a lateral field of view with a second edge that is substantially parallel to the first edge. The first and second edges can define a virtual beam. The system may also include logic to receive signals from the first and second passive motion sensors and determine a gait velocity and level of activity based on the signals from the first and second passive motion sensors.
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