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:
Mar. 12, 2019
Filed:
Feb. 27, 2018
Delphi Technologies, Llc, Troy, MI (US);
Premchand Krishna Prasad, Westfield, IN (US);
DELPHI TECHNOLOGIES, LLC, Troy, MI (US);
Abstract
A warning system includes an angle-detector, a curvature-detection-means, an alert-device, and a controller-circuit. The angle-detector indicates a steering-angle of a hand-wheel of a host-vehicle. The curvature-detection-means detects a curvature of a portion of a roadway traveled by the host-vehicle characterized as ahead of the host-vehicle. The alert-device is operable to alert an operator of the host-vehicle of driver-fatigue. The controller-circuit is in communication with the angle-detector, the curvature-detection-means, and the alert-device. The controller-circuit is configured to determine an average-steering-angle, determine an expected-steering-angle based on the curvature detected by the curvature-detection-means, determine a steering-angle-deviation based on the average-steering-angle and the expected-steering-angle, determine whether the steering-angle-deviation is greater than a predetermined deviation-threshold, determine a frequency of the steering-angle-deviation, and activate the alert-device when the frequency of the steering-angle-deviation exceeds a change-threshold.