The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2012
Filed:
Dec. 04, 2007
Yoshiyuki Hatakeyama, Susono, JP;
Yoshiyuki Hatakeyama, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A device for judging a degree of awakening and a method for judging a degree of awakening which can more reliably detect weak sleepiness of people in action. The device for judging a degree of awakening in accordance with the present invention comprises a heartbeat sensor for acquiring a heartbeat signal from a driver and an ECU for detecting sleepiness of the driver by processing the heartbeat signal. In the ECU, a heartbeat signal preprocessing section for acquiring a heartbeat period time series from the heartbeat signal, a feature amount extracting section for acquiring a heartbeat fluctuation low frequency component power from the heartbeat period time series, a sleepiness detecting section for judging whether sleepiness occurs in the driver or not according the heartbeat fluctuation low frequency component power, a stimulus timing setting section for setting a timing for imparting a stimulus for removing sleepiness to the driver according to the heartbeat fluctuation low frequency component power, and a sleepiness removing stimulus output section for imparting the stimulus to the driver at thus set timing.