Device and method for determining a vigilance state
First Claim
Patent Images
1. A method for determining a vigilance state of a vehicle driver, comprising:
- generating a noise signal;
applying a supplementary torque to a steering assembly as a function of the noise signal;
determining a reaction signal of the vehicle driver;
determining at least one parameter of a parameterized transfer function from the noise signal to the reaction signal; and
determining the vigilance state (a) from a time characteristic of the noise signal and a time characteristic of the reaction signal and (b) as a function of at least one of (i) an absolute value of the at least one parameter and/or (ii) a relative change of the at least one parameter with regard to at least one earlier parameter determined at an earlier instant in time;
wherein the parameterized transfer function includes a linear transfer function and/or time-invariant transfer function.
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Abstract
In a method and a device for determining a vigilance state of a motor vehicle driver,
- a noise signal is generated and a supplementary torque as a function of the noise signal is applied to a steering assembly,
- a reaction signal of the vehicle driver is determined, and
- the vigilance state is determined from a time characteristic of the noise signal and a time characteristic of the reaction signal, at least one parameter of a parameterized transfer function from noise signal to reaction signal is determined, and the vigilance state is determined as a function of an absolute value of the at least one parameter and/or as a function of a relative change of the at least one parameter with regard to at least one earlier parameter, the at least one earlier parameter having been determined at an earlier instant in time.
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Citations
19 Claims
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1. A method for determining a vigilance state of a vehicle driver, comprising:
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generating a noise signal; applying a supplementary torque to a steering assembly as a function of the noise signal; determining a reaction signal of the vehicle driver; determining at least one parameter of a parameterized transfer function from the noise signal to the reaction signal; and determining the vigilance state (a) from a time characteristic of the noise signal and a time characteristic of the reaction signal and (b) as a function of at least one of (i) an absolute value of the at least one parameter and/or (ii) a relative change of the at least one parameter with regard to at least one earlier parameter determined at an earlier instant in time; wherein the parameterized transfer function includes a linear transfer function and/or time-invariant transfer function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 14, 15, 16)
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10. A device for steering a motor vehicle, comprising:
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a steering assembly; at least one unit adapted to generate a noise signal; at least one unit adapted to apply at least one supplementary torque to the steering assembly as a function of at least one noise signal; at least one unit adapted to determine a reaction signal of a vehicle driver; and at least one unit adapted for system identification and adapted to determine at least one parameter of a parameterized transfer function of the noise signal to the reaction signal; wherein the parameterized transfer function includes a linear transfer function and/or time-invariant transfer function. - View Dependent Claims (11)
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12. A method for determining a vigilance state of a vehicle driver, comprising:
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generating a noise signal; applying a supplementary torque to a steering assembly as a function of the noise signal; determining a reaction signal of the vehicle driver; determining at least one parameter of a parameterized transfer function from the noise signal to the reaction signal; and determining the vigilance state (a) from a time characteristic of the noise signal and a time characteristic of the reaction signal and (b) as a function of at least one of (i) an absolute value of the at least one parameter and/or (ii) a relative change of the at least one parameter with regard to at least one earlier parameter determined at an earlier instant in time; wherein the method is performed by a device including; the steering assembly; at least one unit adapted to generate the noise signal; at least one unit adapted to apply the at least one supplementary torque to the steering assembly as a function of the at least one noise signal; at least one unit adapted to determine the reaction signal of the vehicle driver; and at least one unit adapted for system identification and adapted to determine the at least one parameter of a parameterized transfer function of the noise signal to the reaction signal; wherein the parameterized transfer function includes a linear transfer function and/or time-invariant transfer function.
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13. A device for steering a motor vehicle, comprising:
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a steering assembly; at least one unit adapted to generate a noise signal; at least one unit adapted to apply at least one supplementary torque to the steering assembly as a function of at least one noise signal; at least one unit adapted to determine a reaction signal of a vehicle driver; and at least one unit adapted for system identification and adapted to determine at least one parameter of a parameterized transfer function of the noise signal to the reaction signal; wherein the device is adapted to perform a method for determining a vigilance state of the vehicle driver, including; generating the noise signal; applying the supplementary torque to the steering assembly as a function of the noise signal; determining the reaction signal of the vehicle driver; determining the at least one parameter of a parameterized transfer function from the noise signal to the reaction signal; and determining the vigilance state (a) from a time characteristic of the noise signal and a time characteristic of the reaction signal and (b) as a function of at least one of (i) an absolute value of the at least one parameter and/or (ii) a relative change of the at least one parameter with regard to at least one earlier parameter determined at an earlier instant in time; wherein the parameterized transfer function includes a linear transfer function and/or time-invariant transfer function.
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17. A method for determining a vigilance state of a vehicle driver, comprising:
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generating a noise signal; applying a supplementary torque to a steering assembly as a function of the noise signal; determining a reaction signal of the vehicle driver; determining at least one parameter of a parameterized transfer function from the noise signal to the reaction signal; and determining the vigilance state (a) from a time characteristic of the noise signal and a time characteristic of the reaction signal and (b) as a function of at least one of (i) an absolute value of the at least one parameter and/or (ii) a relative change of the at least one parameter with regard to at least one earlier parameter determined at an earlier instant in time; wherein the noise signal is generated by a control unit of the steering assembly.
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18. A method for determining a vigilance state of a vehicle driver, comprising:
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generating a noise signal; applying a supplementary torque to a steering assembly as a function of the noise signal; determining a reaction signal of the vehicle driver; determining at least one parameter of a parameterized transfer function from the noise signal to the reaction signal; and determining the vigilance state (a) from a time characteristic of the noise signal and a time characteristic of the reaction signal and (b) as a function of at least one of (i) an absolute value of the at least one parameter and/or (ii) a relative change of the at least one parameter with regard to at least one earlier parameter determined at an earlier instant in time; wherein the noise signal is added to a setpoint value of the supplementary torque.
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19. A method for determining a vigilance state of a vehicle driver, comprising:
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generating a noise signal; applying a supplementary torque to a steering assembly as a function of the noise signal; determining a reaction signal of the vehicle driver; determining at least one parameter of a parameterized transfer function from the noise signal to the reaction signal; and determining the vigilance state (a) from a time characteristic of the noise signal and a time characteristic of the reaction signal and (b) as a function of at least one of (i) an absolute value of the at least one parameter and/or (ii) a relative change of the at least one parameter with regard to at least one earlier parameter determined at an earlier instant in time; wherein the supplementary torque is generated via a servomotor.
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Specification