Methods and systems for tracking objects or people within a desired area
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United States of America Patent
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Apr 14, 2015
Grant Date -
Sep 3, 2009
app pub date -
Feb 29, 2008
filing date -
Feb 29, 2008
priority date (Note) -
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Abstract
A method for tracking the object includes providing a motion detector on a first radio frequency device and detecting the motion of the first radio frequency device, transmitting radio frequency location signals from the first radio frequency device to a second radio frequency device with time intervals between the transmissions, decreasing the time intervals between the transmissions from the first radio frequency device to the second radio frequency device in response to the detection of motion by the motion detector, and periodically determining a separation distance between the first radio frequency device and the second radio frequency device based on the radio frequency location signals transmitted from the first radio frequency device to the second radio frequency device.
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