Computer-Aided System Detecting Operator Fatigue (CASDOF)
First Claim
1. A system for monitoring operator alertness, comprising:
- a sensor for detecting a head position property of a head of an operator; and
a controller in operative communication with the sensor, the controller configured tocollect a first plurality of time points of the head position property of the head of the operator,determine a baseline of the head position property of the head of the operator based on the first plurality of time points,collect a second plurality of time points of the head position property of the head of the operator,determine an operating condition of the head position property of the head of the operator based on the second plurality of time points, andevaluate the alertness of the operator based on a comparison of the operating condition to the baseline to identify a period of head stillness.
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Accused Products
Abstract
A system for monitoring operator alertness. The system includes a sensor for detecting a head position property of a head of an operator and a controller in operative communication with the sensor. The controller is configured to collect a first plurality of time points of the head position property of the head of the operator, determine a baseline of the head position property of the head of the operator based on the first plurality of time points, collect a second plurality of time points of the head position property of the head of the operator, determine an operating condition of the head position property of the head of the operator based on the second plurality of time points, and evaluate the alertness of the operator based on a comparison of the operating condition to the baseline to identify a period of head stillness.
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Citations
33 Claims
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1. A system for monitoring operator alertness, comprising:
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a sensor for detecting a head position property of a head of an operator; and a controller in operative communication with the sensor, the controller configured to collect a first plurality of time points of the head position property of the head of the operator, determine a baseline of the head position property of the head of the operator based on the first plurality of time points, collect a second plurality of time points of the head position property of the head of the operator, determine an operating condition of the head position property of the head of the operator based on the second plurality of time points, and evaluate the alertness of the operator based on a comparison of the operating condition to the baseline to identify a period of head stillness. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of monitoring alertness of an operator, the method comprising the steps of:
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sensing a head position property of a head of an operator; collecting a first plurality of time points of the head position property of the head of the operator; determining a baseline of the head position property of the head of the operator based on the first plurality of time points; collecting a second plurality of time points of the head position property of the head of the operator; determining an operating condition of the head position property of the head of the operator based on the second plurality of time points; and evaluating the alertness of the operator based on a comparison of the operating condition to the baseline to identify a period of head stillness. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of monitoring alertness of an operator, the method comprising the steps of:
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sensing a head position property of a head of an operator at a plurality of time points; generating an array of head acceleration values based on the head position property values for the plurality of time points; determining a variation of the array of head acceleration values; combining the variation of the array of head acceleration values with a predetermined lower bound limit to produce a cumulative sum value; and if the cumulative sum value is greater than zero for a predetermined period of time and the variation of the array of head acceleration values is zero, taking an action based on the alertness of the operator. - View Dependent Claims (30, 31, 32, 33)
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Specification