System and method for detecting sleepiness

Details System and method for detecting sleepiness System and method for detecting sleepiness

2011-02-15

2011-02-15

Marmor, II, Charles A (Department: 3735)

Surgery

Diagnostic testing

Cardiovascular

C600S500000, C600S508000, C600S483000

Reexamination Certificate

active

07887489

ABSTRACT:
The present invention relates to a drowsiness detection method. A heartbeat signal and a breathing signal are detected by exploiting together a scheme and an optical system scheme. The detected signals are applied to respective amplification units, noise signals are eliminated from the detected signals, and noise-free signals are amplified. The amplified signals are applied to a central processing unit, signal processing is processed on the signals, and processed signals are combined. The combined signal is counted, and a warning sound, voice message or vibration is output in a case where a value, obtained by subtracting a counted output value monitored one minute before a current time, from a counted output value monitored two minutes before the current time, falls within a detection range and where, with a passage of time, the value falling within the detection range is successively detected from two to ten times.

REFERENCES:
patent: 7206631 (2007-04-01), Kawachi et al.
patent: 2005/0143667 (2005-06-01), Park et al.
patent: 2009/0261979 (2009-10-01), Breed et al.
patent: 11-128177 (1999-05-01), None

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