Driver state assessment device
First Claim
1. A driver state assessment device comprisingoperating target value acquisition device for determining a driver'"'"'s operating target value based on an output from a vehicle-installed sensor,actual amount of movement acquisition device for determining an actual amount of movement of the vehicle,actual amount of operation acquisition device for determining an actual amount of operation by the driver,driver model identification device for identifying a driver model showing a driver'"'"'s input/output relationship using a difference between the operating target value and the actual amount of movement as the driver'"'"'s input and the actual amount of operation as the driver'"'"'s output,driver model amount of operation acquisition device for acquiring a driver model amount of operation by inputting a difference between a current operating target value and the actual amount of movement into the driver model identified by the driver model identification device, anddriver state assessment device for calculating a difference between the current actual amount of operation determined by the actual amount of operation acquisition device and the driver model amount of operation determined by the driver model amount of operation acquisition device as a residual error, and assessing the driver'"'"'s state based on the residual error.
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Accused Products
Abstract
A driver state assessment device is provided in which when driver model identification means (M2) identifies a driver model showing a driver'"'"'s input/output relationship using a difference between a target azimuth and an actual azimuth as a driver'"'"'s input and an actual steering angle as a driver'"'"'s output, driver model amount of operation acquisition means (M3) acquires a driver model steering angle by inputting a current azimuth deviation into the driver model, and driver state assessment means (M4) calculates a difference between a current actual steering angle and a driver model steering angle as a residual error and assesses the driver'"'"'s state based on the residual error. Therefore, since the residual error is an index that represents a fluctuation component, a noise component, a non-linear component, etc. obtained from the driver model, it is possible to assess, with high precision, the driver'"'"'s state, in particular a low wakefulness state of the driver, based on this residual error.
14 Citations
8 Claims
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1. A driver state assessment device comprising
operating target value acquisition device for determining a driver'"'"'s operating target value based on an output from a vehicle-installed sensor, actual amount of movement acquisition device for determining an actual amount of movement of the vehicle, actual amount of operation acquisition device for determining an actual amount of operation by the driver, driver model identification device for identifying a driver model showing a driver'"'"'s input/output relationship using a difference between the operating target value and the actual amount of movement as the driver'"'"'s input and the actual amount of operation as the driver'"'"'s output, driver model amount of operation acquisition device for acquiring a driver model amount of operation by inputting a difference between a current operating target value and the actual amount of movement into the driver model identified by the driver model identification device, and driver state assessment device for calculating a difference between the current actual amount of operation determined by the actual amount of operation acquisition device and the driver model amount of operation determined by the driver model amount of operation acquisition device as a residual error, and assessing the driver'"'"'s state based on the residual error.
Specification