Ultra-wideband radar motion sensor
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United States of America Patent
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Nov 1, 1994
Grant Date -
N/A
app pub date -
Apr 12, 1993
filing date -
Apr 12, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A motion sensor is based on ultra-wideband (UWB) radar. UWB radar range is determined by a pulse-echo interval. For motion detection, the sensors operate by staring at a fixed range and then sensing any change in the averaged radar reflectivity at that range. A sampling gate is opened at a fixed delay after the emission of a transmit pulse. The resultant sampling gate output is averaged over repeated pulses. Changes in the averaged sampling gate output represent changes in the radar reflectivity at a particular range, and thus motion.
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