Method and device for accurate real-time detection of drowsiness in operators using physiological responses
US11311221B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2014 |
| Grant date | Apr 26, 2022 |
| Priority date | — |
| Expiry date | Oct 18, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/163
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and device for detection of drowsiness of a person, based on a relationship between distal temperature and heart rate and on a balance between body heat loss and body heat production, wherein the distal temperature in a predetermined distal region of the person is monitored as a measure for body heat loss, and the heart rate of the person is monitored as a measure for body heat production, wherein drowsiness in the immediate future is concluded when a change of distal temperature passes a first threshold and, subsequently, a change of the heart rate passes a second threshold or, subsequently, the change of the distal temperature is larger than the change of the heart rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.