Patent ID: 9139087
Filing Date: 2015-09-22
Classification: A61B,B60K,B60W

Abstract:
1. A method for monitoring the alertness of the driver of a vehicle, comprising: continuously detecting and evaluating at least one physical parameter of the driver while the vehicle is in motion; transmitting a periodic audio signal with a predetermined frequency into a vehicle interior within a predetermined time period if the evaluated physical parameter is in a critical range, whereby the critical range indicates an appropriate level of fatigue of the driver, wherein the predetermined time period ends when the evaluated physical parameter is out of the critical range, wherein the physical parameter is at least one of a time period and a frequency of an eyelid closure of the driver, wherein the predetermined frequency of the transmitted periodic audio signal is in a frequency range between 12 hertz and 15 hertz, wherein the transmitted periodic audio signal is superimposed with other audio signals, wherein the sensor unit is arranged in an inside mirror of the vehicle interior.