Motion detector

Details Motion detector Motion detector

2006-04-21

2008-03-11

Goins, Davetta W. (Department: 2612)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S539160, C340S552000, C340S565000, C342S027000, C342S028000

Reexamination Certificate

active

07342493

ABSTRACT:
According to various illustrative embodiments, a motion-monitoring system comprises at least one antenna fixed within a barrier, the at least one antenna transmitting at least one first radio-frequency signal through the barrier to at least one volume outside the barrier, the at least one first radio-frequency signal reflecting from at least one object in the at least one volume to produce a plurality of second radio-frequency signals, which are received by the at least one antenna, at least one sensing circuit sensing the plurality of second radio-frequency signals and generating a plurality of time-domain output signals, and at least one processor receiving the plurality of time-domain output signals and comparing at least one successive time-domain output signal to at least one previous time-domain output signal to estimate at least one characteristic of the at least one object, including a motion of the at least one object.

REFERENCES:
patent: 6218979 (2001-04-01), Barnes et al.
patent: 6518915 (2003-02-01), Schutz et al.
patent: 6989742 (2006-01-01), Ueno et al.
patent: 7233243 (2007-06-01), Roche et al.
patent: 2007/0205937 (2007-09-01), Thompson et al.

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