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DOZING-OFF DETECTION METHOD AND DEVICE

外国特許コード F130007576
掲載日 2013年7月19日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2012JP072497
国際公開番号 WO 2013/035704
国際出願日 平成24年9月4日(2012.9.4)
国際公開日 平成25年3月14日(2013.3.14)
優先権データ
  • 特願2011-192591 (2011.9.5) JP
  • 特願2011-249662 (2011.11.15) JP
発明の名称 (英語) DOZING-OFF DETECTION METHOD AND DEVICE
発明の概要(英語)

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.

  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • TOYAMA PREFECTURE,
  • NAKAMURA KIYOMI,
  • TAKANO HIRONOBU
  • 発明者(英語)
  • NAKAMURA KIYOMI,
  • TAKANO HIRONOBU
国際特許分類(IPC)
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