METHOD FOR PREPARING EMERGENCY BRAKING OF VEHICLE

• US 20180339704A1
• Filed: 05/11/2018
• Published: 11/29/2018
• Est. Priority Date: 05/29/2017
• Status: Abandoned Application

• Current Assignee: Hyundai Mobis Co., Ltd.
• Original Assignee: Hyundai Mobis Co., Ltd.
• Inventors: JO, Hwan Seong, JI, Yong Kwan
• Application Number:
  US15/977,560
• Publication Number:
  US 20180339704A1
• Time in Patent Office: Days
• CPC Class Codes: B60T 2201/022 Collision avoidance systems
• CPC Class Codes: B60T 7/22 initiated by contact of vehicle, e.g. bumper, with an external object, e.g. another vehicle , or by means of contactless obstacle detectors mounted on the vehicle
• CPC Class Codes: B60W 2420/403 Image sensing, e.g. optical camera
• CPC Class Codes: B60W 2510/182 Brake pressure, e.g. of fluid or between pad and disc
• CPC Class Codes: B60W 2554/00 Input parameters relating to objects
• CPC Class Codes: B60W 30/09 Taking automatic action to avoid collision, e.g. braking and steering
• CPC Class Codes: B60W 30/0956 the prediction being responsive to traffic or environmental parameters
• CPC Class Codes: B60W 30/181 Preparing for stopping

Abstract

A method for preparing emergency braking of a vehicle including receiving information regarding a traveling route of the vehicle or a road and nearby information, by a controller; checking, based on the received information, whether a current traveling section is a section in which predetermined deceleration information exists; setting a braking pressure to a predetermined level 1 (LV1) preparation state, in the case where a current traveling section is a section in which predetermined deceleration information exists; detecting at least one pedestrian-related information around the road by processing an image photographed using a camera, by the controller; and calculating a risk of collision with a pedestrian in a predetermined scheme by the controller when the pedestrian-related information is checked, and setting a braking pressure to a predetermined level 2 (LV2) preparation state in the case where the risk of collision is greater than a preset reference.

Claims

1. A method for preparing emergency braking of a vehicle, comprising:

receiving information regarding a traveling route of the vehicle or a road and nearby information, by a controller;

checking, based on the received information, whether a current traveling section is a section in which predetermined deceleration information exists, by the controller;

setting a braking pressure to a predetermined level 1 (LV1) preparation state, by the controller, in the case where a current traveling section is a section in which predetermined deceleration information exists;

detecting at least one pedestrian-related information around the road by processing an image photographed using a camera, by the controller; and

calculating a risk of collision with a pedestrian in a predetermined scheme by the controller when the pedestrian-related information is checked, and setting a braking pressure to a predetermined level 2 (LV2) preparation state in the case where the risk of collision is greater than a preset reference.

2. The method according to claim 1, wherein the information regarding a traveling route of the vehicle or a road and the nearby information are received from a navigation device mounted to the vehicle or at least one server which is coupled to the controller through wireless communication and provides specified information.

3. The method according to claim 1, wherein the deceleration information is information which is provided in order to guide decelerated traveling to enable emergency braking to be performed in preparation for a risk of occurrence of a traffic accident or minimize impact even when a traffic accident occurs.

4. The method according to claim 1, wherein the deceleration information includes information determined based on a travel speed limit specified in advance for a school or a road construction section and information provided for a section with relatively high probability of an accident to occur, based on predetermined statistical pedestrian information, and the statistical pedestrian information includes at least one among statistical information regarding the number of pedestrians by day of week and time slot, statistical information regarding an average age of pedestrians, and statistical information regarding traffic accidents.

5. The method according to claim 1, wherein the information regarding a traveling route of the vehicle or a road and the nearby information include at least one pedestrian-related statistical information among statistical information regarding the number of pedestrians by day of week and time slot, statistical information on an average age of pedestrians, and statistical information on traffic accidents.

6. The method according to claim 1, wherein the level 1 preparation state is a preparation state in which a braking pressure is boosted to the predetermined level 1 preparation state when a braking pressure in a state where a wheel is completely braked is 100% as a reference.

7. The method according to claim 1, wherein the detecting of the pedestrian-related information around the road comprises:

recognizing front pedestrians and front side pedestrians who are within a predetermined distance from a current point on the road, by processing the photographed image, by the controller; and

checking at least one pedestrian-related information between number information and exposure time information of the recognized pedestrians.

8. The method according to claim 1, wherein the exposure time information, as information that permits knowing how many pedestrians are present closely on a sidewalk in the case where pedestrians in the photographed image are not individually separated and overlap with one another or are stuck together, is information including length information regarding pedestrians in which intervals between individual pedestrians are less than a specified distance.

9. The method according to claim 1, wherein the level 2 preparation state, as a preparation state in which a braking pressure is boosted to the predetermined level 2 preparation state when a braking pressure in a state where a wheel is completely braked is 100% as a reference, is a braking pressure preparation state higher than the level 1 preparation state.

10. The method according to claim 1, wherein the risk of collision is a pedestrian variation index for a probability of a pedestrian to rush into a route of the vehicle;

and the controller classifies a child and an adult based on height in the photographed image and calculates risks of collision by applying weights to the adult and the child such that the risk of collision for the child is calculated to be higher than the risk of collision for the adult.

11. A method for preparing emergency braking of a vehicle, comprising:

photographing information regarding a traveling route of the vehicle or a road and nearby information by using a camera, and detecting at least one pedestrian-related information around the road by processing a photographed image, by the controller;

checking, when the pedestrian-related information is checked, whether the number of pedestrians is greater than a predetermined threshold number and an exposure time is longer than a predetermined threshold time, by the controller;

setting, when, as a result of the checking, the number of pedestrians is greater than the predetermined threshold number and an exposure time is longer than the predetermined threshold time, a braking pressure to a predetermined level 1 (LV1) preparation state, by the control unit; and

calculating a risk of collision with a pedestrian in a predetermined scheme by the control unit, based on the checked pedestrian-related information, and setting a braking pressure to a predetermined level 2 (LV2) preparation state in the case where the risk of collision is greater than a preset reference.

12. The method according to claim 11, wherein:

the level 1 preparation state is a preparation state in which a braking pressure is boosted to the predetermined level 1 preparation state when a braking pressure in a state where a wheel is completely braked is 100% as a reference; and

the level 2 preparation state, as a preparation state in which a braking pressure is boosted to the predetermined level 2 preparation state when a braking pressure in a state where a wheel is completely braked is 100% as a reference, is a braking pressure preparation state higher than the level 1 preparation state.

13. The method according to claim 11, wherein the detecting of the pedestrian-related information around the road comprises:

recognizing front pedestrians and front side pedestrians who are within a predetermined distance from a current point on the road, by processing the photographed image, by the controller; and

checking at least one pedestrian-related information between number information and exposure time information of the recognized pedestrians.

14. The method according to claim 11, wherein the exposure time information, as information that permits knowing how many pedestrians are present closely on a sidewalk in the case where pedestrians in the photographed image are not individually separated and overlap with one another or are stuck together, is information including length information regarding close pedestrians in which intervals between individual pedestrians are less than a specified distance.

15. The method according to claim 11, wherein the risk of collision is a pedestrian variation index for a probability of a pedestrian to rush into a route of the vehicle;

and the control unit classifies a child and an adult based on height in the photographed image and calculates risks of collision by applying weights to the adult and the child such that the risk of collision for the child is calculated to be greater than the risk of collision for the adult.

16. A method for preparing emergency braking of a vehicle, comprising:

receiving information regarding a traveling route of the vehicle or a road and nearby information, by a controller;

checking, based on the received information, whether a current traveling section is a section in which predetermined deceleration information exists, by the controller;

setting a braking pressure to a predetermined level 1 (LV1) preparation state, by the controller, in the case where a current traveling section is a section in which predetermined deceleration information exists;

photographing information regarding a traveling route of the vehicle or a road and nearby information by using a camera and detecting at least one pedestrian-related information around the road by processing a photographed image, by the controller, in the case where a current traveling section is not a section in which predetermined deceleration information exists;

checking, when the pedestrian-related information is checked, whether the number of pedestrians is greater than a predetermined threshold number and an exposure time is longer than a predetermined threshold time, by the controller;

setting, when, as a result of the checking, the number of pedestrians is greater than the predetermined threshold number and an exposure time is longer than the predetermined threshold time, a braking pressure to a predetermined level 1 (LV1) preparation state, by the controller; and

calculating a risk of collision with a pedestrian in a predetermined scheme by the controller, based on the checked pedestrian-related information, and setting a braking pressure to a predetermined level 2 (LV2) preparation state in the case where the risk of collision is greater than a preset reference.