DOZING-OFF DETECTION METHOD AND DEVICE

Title:

DOZING-OFF DETECTION METHOD AND DEVICE

Document Type and Number:

WIPO Patent Application WO/2013/035704

Kind Code:

A1

Abstract:

A dozing-off detection method and device are capable of accurately detecting repeated blinking by using a simple device, and exhibit improved speed and accuracy in dozing-off detection. When the eyes of a person transition from a closed state to an open state, the state during which the eyes are mostly open is considered eyes-open time, while all other states are considered eyes-closed time. A period of time that is relatively shorter than the average interval between blinking for a healthy adult in a state of wakefulness is set as a first threshold interval. A period of time that is relatively longer than the average amount of time that a healthy adult in a state of wakefulness closes their eyes is set as a second threshold interval. When eyes are detected to be open for a shorter time than the first threshold interval, the blinking therebefore and thereafter is considered repeated blinking. Dozing off is determined to have occurred when the time eyes are closed, during the blinking that occurs during said repeated blinking after the eyes are open for a shorter time than the first threshold interval, is equal to or longer than the second threshold interval. Dozing off is immediately determined to have occurred when the time eyes are closed, during the blinking that occurs during said repeated blinking before the eyes open for less than the first threshold interval, is equal to or longer than the second threshold interval. Dozing off is also determined to have occurred when eyes are closed for a relatively longer time than the second threshold interval.

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Inventors:

NAKAMURA KIYOMI (JP)
TAKANO HIRONOBU (JP)

Application Number:

PCT/JP2012/072497

Publication Date:

March 14, 2013

Filing Date:

September 04, 2012

Export Citation:

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Assignee:

TOYAMA PREFECTURE (JP)
NAKAMURA KIYOMI (JP)
TAKANO HIRONOBU (JP)

International Classes:

A61B5/18; A61B5/16; G08G1/16

Domestic Patent References:

WO2010107066A1

2010-09-23

Foreign References:

JP2008073335A	2008-04-03
JP2010068848A	2010-04-02
JP2006136556A	2006-06-01
JP2008073335A	2008-04-03
JP2010224637A	2010-10-07

Other References:

"Heisei 22 nendo nihon seitaiikougakkai hokurikusibutaikai kouen ronbunshuu", pages: 25 - 26

Attorney, Agent or Firm:

HIROSAWA ISAO (JP)
Isao Hirozawa (JP)

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Claims:

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