Method and system for contactless evaluation of fatigue of an operator
First Claim
1. A method for assessing fatigue of an operator comprising the steps of:
- a) placing an electromagnetic inductance device to be fixed to a vehicle'"'"'s safety belt and positioned against a driver'"'"'s chest;
b) embedding another version of said device in the back of a driver'"'"'s seat;
c) connecting said electromagnetic inductance device to a vehicles'"'"'s computer via a cable;
d) passing an alternating current through an excitation coil;
e) measuring at least one induced current waveform derived from a receiver coil;
f) processing said at least one induced current waveform associated with changes in an amplitude caused by eddy current losses in a heart region;
g) determining a fatigue level based on said changes in said eddy current.
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Accused Products
Abstract
The invention relates to a method and device for contactless assessment of fatigue of a user, in particular a vehicle operator. The invention is comprised of a seamless continuous evaluation of cardiac activity variability and uses this data as an input for evaluation and quantitative assessment of sympathetic and parasympathetic activity of the autonomic nervous system, which are reliable markers of the physiological condition of a user. The small device is fixed to a driver'"'"'s safety belt or embedded in the back of driver'"'"'s seat without direct contacts to a user'"'"'s body. The device continuously monitors the fatigue level of a user and alerts the user if he/she unexpectedly drifts from wakefulness to drowsiness. The invention significantly improves the safety of a vehicle operator.
104 Citations
22 Claims
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1. A method for assessing fatigue of an operator comprising the steps of:
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a) placing an electromagnetic inductance device to be fixed to a vehicle'"'"'s safety belt and positioned against a driver'"'"'s chest; b) embedding another version of said device in the back of a driver'"'"'s seat; c) connecting said electromagnetic inductance device to a vehicles'"'"'s computer via a cable; d) passing an alternating current through an excitation coil; e) measuring at least one induced current waveform derived from a receiver coil; f) processing said at least one induced current waveform associated with changes in an amplitude caused by eddy current losses in a heart region; g) determining a fatigue level based on said changes in said eddy current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification