DRIVER HANDS ON/OFF DETECTION DURING AUTOMATED LANE CENTERING/CHANGING MANEUVER
First Claim
1. A method for determining whether a vehicle driver is holding onto a vehicle steering wheel, said method comprising:
- providing a perturbation signal to the steering wheel that causes the steering wheel to vibrate; and
determining that the vehicle driver is not holding onto the steering wheel of the vehicle if the perturbation signal is detected by vibrations on the steering wheel.
8 Assignments
0 Petitions
Accused Products
Abstract
A system and method for determining whether a vehicle driver is holding a steering wheel of the vehicle while the vehicle is in an autonomous driving mode. The vehicle will include an electric power steering (EPS) system and may include an active front steering (AFS) system, both of which include a motor that can apply a high frequency and low amplitude perturbation signal to the steering wheel of the vehicle that is not felt by the vehicle driver and does not cause the vehicle to turn, but is able to be detected by a steering angle sensor. The method subtracts a steering angle command signal from the steering angle signal and removes road disturbances, and then determines whether the induced perturbation signal is present in the steering angle sensor signal. If the perturbation signal is present, then the system knows that the vehicle driver is not holding the steering wheel.
115 Citations
20 Claims
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1. A method for determining whether a vehicle driver is holding onto a vehicle steering wheel, said method comprising:
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providing a perturbation signal to the steering wheel that causes the steering wheel to vibrate; and determining that the vehicle driver is not holding onto the steering wheel of the vehicle if the perturbation signal is detected by vibrations on the steering wheel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for determining whether a vehicle driver is holding onto a vehicle steering wheel, said method comprising:
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providing a perturbation signal to the steering wheel that causes the steering wheel to vibrate; determining that the vehicle is in an autonomous or semi-autonomous driving mode; providing a steering command signal for steering the vehicle while it is in the autonomous or semi-autonomous driving mode; detecting the steering angle of the steering wheel and providing a steering angle signal; subtracting the steering command signal from the steering angle signal; and determining whether the perturbation signal exists in the steering angle signal after the steering command signal has been subtracted from the steering angle signal. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A system for determining whether a vehicle driver is holding onto a vehicle steering wheel, said system comprising:
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means for providing a perturbation signal to the steering wheel that causes the steering wheel to vibrate; means for determining that the vehicle is in an autonomous or semi-autonomous driving mode; means for providing a steering command signal for steering the vehicle while it is in the autonomous or semi-autonomous driving mode; means for detecting the steering angle of the steering wheel and providing a steering angle signal; means for subtracting the steering command signal from the steering angle signal; and means for determining whether the perturbation signal exists in the steering angle signal after the steering command signal has been subtracted from the steering angle signal. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification