# US 10,864,918 B2 · Vehicle and method for supporting driving safety thereof

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- Number: US 10,864,918 B2
- Document ID: US10864918B2
- Status: Granted
- Kind: B2
- Application number: 16/025,096
- Filed: 2018-07-02
- Published: 2019-05-30
- Granted: 2020-12-15
- Earliest claimed: 2017-11-28
- Assignees: Hyundai Motor Company; Kia Motors Corporation
- Applicants: Hyundai Motor Company; Kia Motors Corporation
- Inventors: Dae Yun An
- Web page: https://patentgrep.com/patent/US10864918B2

## CPC

- A61B 5/024: Measuring pulse rate or heart rate
- B60W 50/085: {Changing the parameters of the control units, e.g. changing limit values, working points by control input}
- A61B 5/18: for vehicle drivers {or machine operators}
- A61B 5/38: Acoustic or auditory stimuli
- A61B 5/6803: {Head-worn items, e.g. helmets, masks, headphones or goggles}
- A61B 5/7225: {Details of analogue processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation (input circuits for detecting, measuring, or recording bioelectric or biomagnetic signals A61B5/30; specific diagnostic methods using bioelectric or biomagnetic signals A61B5/316)}
- A61B 5/7267: {involving training the classification device}
- B60W 30/182: Selecting between different operative modes, e.g. comfort and performance modes
- B60W 40/08: related to drivers or passengers
- B60W 50/14: Means for informing the driver, warning the driver or prompting a driver intervention
- B60W 60/0051: {from occupants to vehicle}
- B60W 60/0053: {from vehicle to occupant}
- B60W 60/0059: {Estimation of the risk associated with autonomous or manual driving, e.g. situation too complex, sensor failure or driver incapacity}
- G05D 1/00: Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots (drive control systems specially adapted for autonomous road vehicles B60W60/00)
- A61B 3/113: for determining or recording eye movement
- A61B 5/162: {Testing reaction times}
- A61B 5/163: {by tracking eye movement, gaze, or pupil change}
- A61B 5/378: Visual stimuli
- B60W 2040/0818: {Inactivity or incapacity of driver}
- B60W 2040/0827: {due to sleepiness}
- B60W 2040/0836: {due to alcohol}
- B60W 2040/0845: {due to drugs}
- B60W 2040/0872: {Driver physiology}
- B60W 2050/0071: {Controller overrides driver automatically}
- B60W 2050/0095: {Automatic control mode change}
- B60W 2540/221: Physiology, e.g. weight, heartbeat, health or special needs
- B60W 2540/225: Direction of gaze
- B60W 2540/229: Attention level, e.g. attentive to driving, reading or sleeping
- B60Y 2302/05: Leading to automatic stopping of the vehicle
- G16H 50/70: for mining of medical data, e.g. analysing previous cases of other patients
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- G05D: SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- G16H: HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA

## Abstract

A method for adjusting a driving control authority of a vehicle includes: generating stimulation for a driver using a stimulation generator; measuring a driver reaction signal in response to the generated stimulation using a measurement device; processing the measured driver reaction signal using a signal processor; determining a driver state based on the processed driver reaction signal using a determiner; and adjusting the driving control authority of the vehicle according to the determined driver state using a vehicle controller.

## Claims

### Claim 1

A method for adjusting a driving control authority of a vehicle, the method comprising:
generating stimulation including sound generated when a driver boards the vehicle for a driver using a stimulation generator, wherein the sound includes a welcome sound or a seat belt warning sound;
measuring a driver reaction signal in response to the generated stimulation using a measurement device, wherein the driver reaction signal comprises measuring a brainwave of the driver;
processing the measured driver reaction signal using a signal processor;
determining a driver state based on the processed driver reaction signal using a processor; and
adjusting the driving control authority of the vehicle according to the determined driver state using a vehicle controller,
wherein the processing of the driver reaction signal comprises:
performing filtering on the driver reaction signal to classify a signal other than the brainwave as noise;
extracting an event-related potential (ERP) from the filtered driver reaction signal; and
extracting, from the ERP, a potential having a maximum amplitude value after a specific time elapses from a time at which the stimulation is generated.

### Claim 2 (depends on 1)

The method of claim 1, wherein the measuring of the driver reaction signal comprises:
measuring a bio-signal of the driver.

### Claim 3 (depends on 2)

The method of claim 2, wherein the measuring of the driver reaction signal further comprises:
measuring one of a heart rate of the driver and gaze information of the driver.

### Claim 4 (depends on 3)

The method of claim 3, wherein the determining of the driver state comprises:
determining the driver state to be a normal state when the maximum amplitude value of the brainwave is greater than or equal to a reference value.

### Claim 5 (depends on 4)

The method of claim 4, wherein the adjusting of the driving control authority of the vehicle comprises:
controlling operation of the vehicle such that the vehicle performs either autonomous driving or manual driving when the driver state is the normal state.

### Claim 6 (depends on 3)

The method of claim 3, wherein the determining of the driver state comprises:
determining the driver state to be an abnormal state when the maximum amplitude value of the brainwave is less than a reference value.

### Claim 7 (depends on 6)

The method of claim 6, wherein the adjusting of the driving control authority of the vehicle comprises:
controlling operation of the vehicle such that the vehicle performs either autonomous driving or an emergency stop when the driver state is the abnormal state.

### Claim 8

A system for adjusting a driving control authority of a vehicle, the system comprising:
a stimulation generator to generate stimulation for a driver, wherein the stimulation including sound generated when a driver boards the vehicle, wherein the sound includes a welcome sound or a seat belt warning sound;
a measurement device including a sensor device configured to measure a driver reaction signal in response to the generated stimulation;
a signal processor configured to:
process the measured driver reaction signal, wherein the driver reaction signal comprises measuring a brainwave of the driver;
perform filtering on the driver reaction signal to classify a signal other than the brainwave as noise;
extract an event-related potential (ERP) from the filtered driver reaction signal; and
extract, from the ERP, a potential having a maximum amplitude value after a specific time elapses from a time at which the stimulation is generated;
a processor configured to determine a driver state based on the processed driver reaction signal; and
a vehicle controller configured to adjust the driving control authority of the vehicle according to the determined driver state.

### Claim 9 (depends on 8)

The system of claim 8, wherein the sensor device is included in the vehicle or wearable by the driver.

### Claim 10 (depends on 8)

The system of claim 8, wherein the processor determines the driver state to be a normal state when the maximum amplitude value of the brainwave is greater than or equal to a reference value.

### Claim 11 (depends on 10)

The system of claim 10, wherein the vehicle controller controls operation of the vehicle such that the vehicle performs autonomous driving or manual driving when the driver state is the normal state.

### Claim 12 (depends on 8)

The system of claim 8, wherein the processor determines the driver state to be an abnormal state when the maximum amplitude value of the brainwave is less than a reference value.

### Claim 13 (depends on 12)

The system of claim 12, wherein the vehicle controller controls operation of the vehicle such that the vehicle performs either autonomous driving or an emergency stop when the driver state is the abnormal state.