| US 7,397,382 B2 | ||
| Drowsiness detecting apparatus and method | ||
| Tatsuya Ikegami, Nisshin (Japan); Shinji Nanba, Kariya (Japan); and Kenichi Yanai, Nisshin (Japan) | ||
| Assigned to DENSO CORPORATION, Kariya (Japan) | ||
| Filed on Jun. 23, 2005, as Appl. No. 11/159,147. | ||
| Claims priority of application No. 2004-242386 (JP), filed on Aug. 23, 2004. | ||
| Prior Publication US 2006/0038689 A1, Feb. 23, 2006 | ||
| Int. Cl. G08B 23/00 (2006.01) | ||
| U.S. Cl. 340—575 [340/576; 701/1] | 18 Claims |
| 1. A drowsiness detecting apparatus comprising:
breath depth detecting means for detecting a depth of breathing of a person; and
determining means for determining drowsiness of the person, when the depth of breathing falls in a predetermined breathing
condition including at least one of a sudden decrease in the depth of breathing and a periodic repetition of deep breathing
and shallow breathing,
wherein the periodic repetition is set to 3 to 7 breaths.
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