Hands on steering wheel detect
First Claim
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1. A method for determining whether hands of an operator of a vehicle are positioned on a hand wheel of the vehicle, comprising:
- generating, by a control module, a first frequency content below a first frequency from a hand wheel torque signal received by the control module from a hand wheel torque sensor;
generating, by the control module, a second frequency content above a second frequency from the first frequency content of the hand wheel torque signal;
generating, by the control module, a hands on wheel (HOW) estimate signal based on a first frequency weighting applied to the first frequency content and summed with a second frequency weighting applied to the second frequency content, and limiting a rate of change of the HOW estimate signal; and
causing, by the control module, a system of the vehicle to operate based on the HOW estimate signal.
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Abstract
A method for determining whether hands of an operator of a vehicle are positioned on a hand wheel of the vehicle is provided. The method generates a first frequency content below a first frequency from a hand wheel torque signal. The method generates a second frequency content above a second frequency from the hand wheel torque signal. The method generates a hands on wheel (HOW) estimate signal based on the first frequency content and the second frequency content. The method causes a system in a vehicle to operate based on the HOW estimate signal.
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Citations
18 Claims
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1. A method for determining whether hands of an operator of a vehicle are positioned on a hand wheel of the vehicle, comprising:
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generating, by a control module, a first frequency content below a first frequency from a hand wheel torque signal received by the control module from a hand wheel torque sensor; generating, by the control module, a second frequency content above a second frequency from the first frequency content of the hand wheel torque signal; generating, by the control module, a hands on wheel (HOW) estimate signal based on a first frequency weighting applied to the first frequency content and summed with a second frequency weighting applied to the second frequency content, and limiting a rate of change of the HOW estimate signal; and causing, by the control module, a system of the vehicle to operate based on the HOW estimate signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A control system, comprising:
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a hand wheel torque sensor configured to generate a hand wheel torque signal based on a movement of a hand wheel of a vehicle; and a control module for determining whether hands of an operator of the vehicle are positioned on a hand wheel of the vehicle, the control module configured to; generate a first frequency content below a first frequency from a hand wheel torque signal; generate a second frequency content above a second frequency from the first frequency content of the hand wheel torque signal; generate a hands on wheel (HOW) estimate signal based on a first frequency weighting applied to the first frequency content and summed with a second frequency weighting applied to the second frequency content, and limit a rate of change of the HOW estimate signal; and cause a system of the vehicle to operate based on the HOW estimate signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification