Living being presence detection system

Details Living being presence detection system Living being presence detection system

2006-04-25

2008-08-26

Pope, Daryl C (Department: 2612)

Communications: electrical

Condition responsive indicating system

With particular coupling link

C340S438000, C340S439000, C701S045000

Reexamination Certificate

active

07417536

ABSTRACT:
A system for distinguishing between a first condition corresponding to a living subject being directly in contact with an object of interest, and a second condition corresponding to the absence of contact between the living subject and the object of interest. A transducer, which may be a MEMs sensor, is disposed in predetermined relationship to the object of interest and produces a transducer signal responsive to a pressure wave resulting from the living subject being directly in contact the object of interest. A database stores data corresponding to the first condition and may contain additional data corresponding to the second condition. A processor calculates an algorithm of a non-linear short-term frequency-selective energy distribution of the transducer signal over time to produce transducer signal data. An arrangement, which may be a human listener or a processor system, determines a threshold between the first and second conditions in response to the transducer signal data and the first and second data. The direct contact may be a tap or stroking contact by a living subject. The transducer can be disposed within, or on the exterior of, the object of interest.

REFERENCES:
patent: 5886697 (1999-03-01), Naughton et al.
patent: 6160551 (2000-12-01), Naughton et al.
patent: 6249698 (2001-06-01), Parris

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