Impaired operation detection method
First Claim
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1. An impaired operation detection method comprising:
- sensing a yaw rate of a vehicle over a time period;
identifying time points of the time period in which the yaw rate changes direction;
determining a linear rate of change in the yaw rate between two of the time points that are sequential in time;
examining an actual rate of change in the yaw rate occurring between the two of the time points;
determining a difference between the actual rate of change and the linear rate of change to obtain a difference value; and
determining an operator'"'"'s impairment condition based on the difference value.
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Abstract
An impaired operation detection method is basically performed by sensing a yaw rate of a vehicle over a time period. Then time points are identified in which the yaw rate changes direction. A linear rate of change in the yaw rate is determined between two of the time points that are sequential in time. An actual rate of change is examined between the two time points. A difference between the actual rate of change and the linear rate of change to obtain a difference value. Then, the operator'"'"'s impairment condition is determined based on the difference value.
16 Citations
24 Claims
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1. An impaired operation detection method comprising:
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sensing a yaw rate of a vehicle over a time period; identifying time points of the time period in which the yaw rate changes direction; determining a linear rate of change in the yaw rate between two of the time points that are sequential in time; examining an actual rate of change in the yaw rate occurring between the two of the time points; determining a difference between the actual rate of change and the linear rate of change to obtain a difference value; and determining an operator'"'"'s impairment condition based on the difference value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An impaired operation detection system comprising:
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a sensor configured to sense a yaw rate of a vehicle over a time period; and a controller configured to receive a signal indicative of the yaw rate of the vehicle, the controller being further configured to identify time points of the time period in which the yaw rate changes direction based on the signal from the sensor; determine a linear rate of change in the yaw rate between two of the time points that are sequential in time, examine an actual rate of change in the yaw rate occurring between the two of the time points, determine a difference between the actual rate of change and the linear rate of change to obtain a difference value, and determine an operator'"'"'s impairment condition based on the difference value. - View Dependent Claims (22, 23, 24)
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Specification