Method and apparatus for determining workload of motor vehicle driver
First Claim
Patent Images
1. A method for determining driver workload comprising:
- monitoring a steering angle of a vehicle over time;
estimating a predicted steering angle of the vehicle over time based on the monitored steering angle;
generating steering angle prediction errors based on the predicted steering angle and the monitored steering angle at predetermined points in time; and
generating a workload value based on the steering angle prediction errors.
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Abstract
A steering angle sensor monitors the steering angle of a vehicle as the vehicle is driven. The steering angle signal is input to a processing device which generates steering angle prediction errors based on the received steering angle. The processing device then generates a distribution of steering angle prediction errors. The distribution of prediction errors is compared to the distribution of steering angle prediction errors representing load-free driving. The comparison represents the driver'"'"'s workload.
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Citations
37 Claims
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1. A method for determining driver workload comprising:
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monitoring a steering angle of a vehicle over time; estimating a predicted steering angle of the vehicle over time based on the monitored steering angle; generating steering angle prediction errors based on the predicted steering angle and the monitored steering angle at predetermined points in time; and generating a workload value based on the steering angle prediction errors. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for generating a workload value representing a driver'"'"'s workload comprising:
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an input device configured to receive a steering angle signal representing the angle of a vehicle'"'"'s steering wheel; and a workload monitoring device coupled to the input device and configured to; receive the steering angle signal; generate a predicted steering angle at predetermined times based on the received steering angle signal; compare the predicted steering angle at the predetermined times to the steering angle signal to generate predicted steering angle errors; and generate the workload value based on said errors.
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9. A system for generating a workload value representing a driver'"'"'s workload comprising:
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an input device configured to receive a steering angle signal representing the angle of a vehicle'"'"'s steering wheel; and a workload monitoring device coupled to the input device and configured to; receive the steering angle signal, generate a predicted steering angle at predetermined times, compare the predicted steering angle to the steering angle signal to generate predicted steering anile errors at the predetermined times, generate a distribution of the predicted steering angle errors, and generate the workload value based on said distribution. - View Dependent Claims (10, 11, 12, 13)
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14. A system for generating a workload value representing a driver'"'"'s workload comprising:
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an input device configured to receive a steering angle signal representing the angle of a vehicle'"'"'s steering wheel; and a workload monitoring device coupled to the input device and configured to; receive the steering angle signal, perform a Taylor series expansion of the received steering angle signal at predetermined times to generate predicted steering angles at the predetermined times, and generate a workload value based on the received steering angle signal. - View Dependent Claims (15)
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16. A method for determining driver workload comprising:
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monitoring a steering angle of a vehicle over a period of time; estimating a predicted steering angle of the vehicle at least at predetermined intervals of time; generating steering angle prediction errors based on the predicted steering angle and the monitored steering angle at the predetermined intervals of time; generating a distribution of the steering angle prediction errors; generating a first entropy value based on the distribution of the steering angle prediction errors; comparing the first entropy value to a second entropy value based on steering angle prediction errors obtained under load-free driving conditions; and generating a workload index based on the result of the comparing step. - View Dependent Claims (17, 18)
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19. A method for determining driver workload comprising:
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monitoring a control variable of a vehicle over time; estimating a predicted control variable of the vehicle over time based on the monitored control variable; generating prediction errors, at predetermined intervals of time, based on the monitored control variable and the predicted control variable; and generating a value representative of the driver workload based on the prediction errors. - View Dependent Claims (20, 21)
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22. A method for determining driver workload comprising:
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monitoring the steering angle of the vehicle over time; estimating a predicted steering angle of the vehicle over time; generating steering angle prediction errors based on the predicted steering angle and the monitored steering angle at predetermined points in time; and generating a workload value in response to the steering angle prediction errors. - View Dependent Claims (23, 24, 25)
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26. A system for generating a workload value representing a driver'"'"'s workload comprising:
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an input device configured to generate a steering angle signal representing the angle of a vehicle'"'"'s steering wheel; and a workload monitoring device coupled to the input device and configured to; receive the steering angle signal; generate a predicted steering angle at predetermined intervals, compare the predicted steering angle at the predetermined intervals to the steering angle signal to determine predicted steering angle errors, and generate the workload value based on the predicted steering angle errors. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A method for determining driver workload comprising:
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monitoring a control variable on a vehicle; estimating predictions of the control variable of the vehicle at intervals of time; generating prediction errors at the intervals of time based on the predictions of the control variable and the monitored control variable; and generating a value representative of the driver workload based on the prediction errors.
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33. A system for generating a workload value representing a driver'"'"'s workload comprising:
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an input device configured to monitor a control variable on a vehicle and generate a signal in response to the monitored control variable; and a workload monitoring device coupled to the input device and configured to; receive the control variable signal; generate predictions of the control variable of the vehicle at intervals of time; generate prediction errors at the intervals of time based on the predictions of the control variable and the control variable signal; and generate a value representative of the driver workload based on the prediction errors. - View Dependent Claims (34, 35)
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36. A method for determining driver workload comprising:
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monitoring a parameter of a state of the vehicle, over time; estimating a predicted variable related to steering of the vehicle, over time, based on the monitored parameter; generating prediction errors based on the predicted variable at intervals of time and actual values of a variable related to the steering of the vehicle; and generating a value representative of the driver workload based on the prediction errors. - View Dependent Claims (37)
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Specification