Pedestrian warning device of vehicle

A pedestrian warning device of a vehicle is disclosed. The pedestrian warning device includes a pedestrian detector configured to detect a position of a pedestrian walking around a vehicle, an in-vehicle warning sound outputter configured to output warning sounds through a plurality of internal speakers arranged at different positions in the vehicle, and a controller configured to generate pedestrian movement information including a movement direction of the pedestrian based on the detected position of the pedestrian, determine a moved position of the pedestrian based on the generated pedestrian movement information, control an operation of the in-vehicle warning sound outputter according to the determined moved position to operate an internal speaker corresponding to the moved position of the pedestrian among the plurality of internal speakers as the pedestrian moves, and notify a driver of the moved position of the pedestrian by change of a direction of the output warning sound.

CROSS-REFERENCE TO RELATED APPLICATION(S)

This application claims the benefit of Korean Patent Application No. 2016-0170051, filed on Dec. 14, 2016 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.

BACKGROUND

The present invention relates to a pedestrian warning device of a vehicle, and more particularly to a pedestrian warning device of a vehicle that alerts a driver to a pedestrian around the vehicle.

2. Description of the Related Art

Generally, driving vehicles such as electric vehicles, fuel cell vehicles, hybrid vehicles, etc., which run on electric driving, have a quiet driving sound than engine vehicles. Therefore, it is difficult for pedestrians to recognize the approach of electric vehicles, fuel cell vehicles, and hybrid vehicles.

Therefore, there is a risk of accident between the vehicle and the pedestrian due to the pedestrian not noticing the vehicle.

Japanese Laid-Open Patent Publication No. 2006-044359 discloses a pedestrian notification device for a vehicle that detects pedestrians around the vehicle and alerts a driver.

However, at present, only the existence of the pedestrian is notified to the driver with a warning sound and the moving direction of the pedestrian cannot be notified to the driver.

Therefore, at present, the safety of pedestrians cannot be secured sufficiently, and there is still a risk of an accident between the vehicle and the pedestrian.

PRIOR ART DOCUMENT

Patent Literature

SUMMARY

Therefore, it is an aspect of the present invention is to provide a pedestrian warning device of a vehicle that notifies a driver of a moved position of a pedestrian by using the direction of a warning sound outputted from internal speakers that output warning sounds to the inside of a vehicle.

It is another aspect of the present invention to provide a pedestrian warning device of a vehicle that notifies a driver of a moved position of a pedestrian by using the direction of a warning sound outputted from internal speakers outputting warning sounds to the inside of a vehicle, and notifies a pedestrian of the position of the vehicle by using the direction of a warning sound outputted from external speakers that output warning sounds to the outside of the vehicle.

In accordance with one aspect of the present disclosure, a pedestrian warning device of a vehicle includes: a pedestrian detector configured to detect a position of a pedestrian walking around a vehicle; an in-vehicle warning sound outputter configured to output warning sounds through a plurality of internal speakers arranged at different positions in the vehicle; and a controller configured to generate pedestrian movement information including a movement direction of the pedestrian based on the detected position of the pedestrian, determine a moved position of the pedestrian based on the generated pedestrian movement information, control an operation of the in-vehicle warning sound outputter according to the determined moved position to operate an internal speaker corresponding to the moved position of the pedestrian among the plurality of internal speakers as the pedestrian moves, and notify a driver of the moved position of the pedestrian by change of a direction of the output warning sound.

Further, the pedestrian warning device may include an out-vehicle warning sound outputter configured to output warning sounds through a plurality of external speakers oriented to various directions of the outside of the vehicle, and the controller may include operating an external speaker corresponding to the moved position of the pedestrian among the plurality of external speakers according to the determined moved position and notifying the pedestrian of a position of the vehicle by change of a direction of the output warning sound.

Further, the controller may notify the pedestrian of the position of the vehicle by change of a volume of the output warning sound when operating the external speaker corresponding to the moved position of the pedestrian among the plurality of external speakers as the pedestrian moves.

Further, the controller may notify the driver of the moved position of the pedestrian by change of a volume of the output warning sound when operating the internal speaker corresponding to the moved position of the pedestrian among the plurality of internal speakers as the pedestrian moves.

Further, the controller may control the volume of the output warning sound according to a distance between the pedestrian and the vehicle.

DETAILED DESCRIPTION

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The following embodiments are provided to fully convey the spirit of the present disclosure to a person having ordinary skill in the art to which the present disclosure belongs. The present disclosure is not limited to the embodiments shown herein but may be embodied in other forms. The drawings are not intended to limit the scope of the present disclosure in any way, and the size of components may be exaggerated for clarity of illustration. The drawings and description are to be regarded as illustrative in nature and not restrictive, and like reference numerals designate like elements throughout the specification.

FIG. 1is a control block diagram of a pedestrian warning device of a vehicle according to an embodiment of the present invention.

Referring toFIG. 1, a pedestrian warning device of a vehicle includes a controller10that performs overall control.

A pedestrian detector20is electrically connected to an input side of the controller10.

An in-vehicle warning sound outputter30and an out-vehicle warning sound outputter40are electrically connected to an output side of the controller10.

The pedestrian detector20may detect a pedestrian walking around the vehicle. For example, the pedestrian detector20may include laser sensors, millimeter-wave radars, or stereo cameras having image sensors.

The pedestrian detector20may be provided at a plurality of positions on the front, rear, left, and right sides of the vehicle so as to detect pedestrians located in various directions around the vehicle when the pedestrian detection is possible only in any one of the front, rear, left, and right sides of the vehicle.

The pedestrian detector20may be provided in the singular number when the pedestrian detector20using a stereo camera capable of 360-degree photographing is provided.

The pedestrian detector20detects a pedestrian around the vehicle and transmits information about the detected pedestrian (referred to as pedestrian information) to the controller10. The controller10may recognize the direction and the position of the pedestrian based on the pedestrian information detected by the pedestrian detector20.

The in-vehicle warning sound outputter30outputs a warning sound to the inside of the vehicle according to a control signal of the controller10so that the driver can recognize a moved position of the pedestrian based on the direction of the output warning sound. The in-vehicle warning sound outputter30may include a plurality of internal speakers provided at different positions in the vehicle and oriented to the inside of the vehicle. The in-vehicle warning sound outputter30may control the operation of each internal speaker and the volume of the warning sound outputted from each internal speaker. For reference, the number and the mounting position of the internal speakers may be changeable according to the type of vehicle or the necessity.

The out-vehicle warning sound outputter40outputs a warning sound to the outside of the vehicle according to a control signal of the controller10so that the pedestrian can recognize the position of the vehicle based on the direction of the output warning sound. The out-vehicle warning sound outputter40may include a plurality of external speakers oriented in various directions of the outside of the vehicle. The out-vehicle warning sound outputter40may control the operation of each external speaker and the volume of the warning sound outputted from each external speaker. For reference, the number and the mounting position of the external speakers may be changeable according to the type of vehicle or the necessity.

The controller10can generate pedestrian movement information including the movement direction of the pedestrian based on the position of the pedestrian detected through the pedestrian detector20, determine a moved position of the pedestrian based on the generated pedestrian movement information, control the operation of the in-vehicle warning sound outputter30according to the determined moved position to operate an internal speaker corresponding to the moved position of the pedestrian among the plurality of internal speakers as the pedestrian moves, and notify the driver of the moved position of the pedestrian by using the direction of the output warning sound.

Further, the controller10may generate pedestrian movement information including the movement direction of the pedestrian based on the position of the pedestrian detected through the pedestrian detector20, determine a moved position of the pedestrian based on the generated pedestrian movement information, control the operation of the out-vehicle warning sound outputter40according to the determined moved position to operate an external speaker corresponding to the moved position of the pedestrian among the plurality of external speakers as the pedestrian moves, and notify the pedestrian of the position of the vehicle by using the direction of the output warning sound.

FIG. 2is a view for illustrating an arrangement of internal speakers and external speakers of a pedestrian warning device of a vehicle according to an embodiment of the present invention.

Referring toFIG. 2, the in-vehicle warning sound outputter30may include four internal speakers31to34. For example, the four internal speakers31to34may be provided on respective corners of the inside of the vehicle. The four internal speakers31to34may be provided in front of a driver's seat, in front of an assistant's seat, in rear of a seat behind the driver's seat, and in rear of a seat behind the assistant seat, respectively. The internal speakers may be separately provided from the vehicle, or may be embedded in the vehicle.

The out-vehicle warning sound outputter40may include four external speakers41to44. For example, the four external speakers41to44may be provided in the vicinity of each of two headlights in the front of the vehicle, and in the vicinity of each of two brake lamps in the rear of the vehicle, respectively.

Hereinafter, the operation of the pedestrian warning device of a vehicle having the above-described configuration will be described.

FIG. 3is a control flowchart of a pedestrian warning device of a vehicle according to an embodiment of the present invention.

Referring toFIG. 3, the controller10detects pedestrian information around the vehicle through the pedestrian detector20(100).

After detecting the pedestrian information in the operation100, the controller10analyzes the detected pedestrian information to determine whether there is a pedestrian walking around the vehicle (110).

If a pedestrian exists as a result of the determination in the operation110, the controller10operates the external speaker corresponding to the position of the pedestrian through the out-vehicle warning sound outputter40to output a warning sound from the external speaker so as to notify the pedestrian of the position of the vehicle. (120). Therefore, the pedestrian can recognize the position of the vehicle based on the direction of the warning sound coming from the external speaker, so that the pedestrian can be pre-cautious the collision with the vehicle.

Then, the controller10operates the internal speaker corresponding to the position of the pedestrian through the in-vehicle warning sound outputter30to output a warning sound from the internal speaker so as to notify the driver of the moved position of the pedestrian (130). Therefore, the driver can recognize the moved position of the pedestrian based on the direction of the warning sound from the internal speaker, so that the collision between the vehicle and the pedestrian can be prevented in advance.

FIGS. 4 to 6are views for illustrating changes in the direction of a warning sound outputted for each pedestrian position when a pedestrian located in the front of the vehicle moves to the right side of the vehicle in a pedestrian warning device of a vehicle according to an embodiment of the present invention.

As shown inFIG. 4, when a pedestrian P is located in front of a vehicle V, a first external speaker41and a second external speaker42mounted adjacent to the left and right headlights of the vehicle V among the four external speakers41to44are operated. Accordingly, the first external speaker41and the second external speaker42output warning sounds, so that the pedestrian P can identify the position of the vehicle V based on the direction of the output warning sounds.

Further, when the pedestrian P is located in front of the vehicle V, a first internal speaker31and a second internal speaker32mounted in front of the drivers seat and the assistant's sear among the four internal speakers31to34are operated. Accordingly, the first internal speaker31and the second internal speaker32output warning sounds, so that the driver can identify that the pedestrian exists in front of the vehicle V in the direction of the output alarm sound.

As shown inFIG. 5, when the pedestrian P moves from the front of the vehicle V to the front right side of the vehicle V, the first external speaker41in operation stops operating and only the second external speaker42in operation continuously outputs the warning sound. Accordingly, warning sound is not output from both the first external speaker41and the second external speaker42, but output only from the second external speaker42, so that the pedestrian P can identify the position of the vehicle V through the change of the warning sound.

Further, when the pedestrian P moves from the front of the vehicle V to the front right side of the vehicle V, the first internal speaker31in operation stops operating and only the second internal speaker32in operation continuously outputs the warning sound. Accordingly, the warning sound is not output from both the first internal speaker31and the second internal speaker32, but is output only from the second internal speaker32, so that the driver can identify that the pedestrian P has moved from the front of the vehicle to the front right side of the vehicle V through the change of the warning sound.

As shown inFIG. 6, when the pedestrian P moves from the front right side of the vehicle V to the right side of the vehicle V, the second external speaker42in operation continues to output the warning sound and a third external speaker43is additionally operated. Accordingly, the warning sound is output not only from the second external speaker42, but also from the third external speaker43, so that the pedestrian P can identify the position of the vehicle V through the change of the warning sound.

Further, when the pedestrian P moves from the front right side of the vehicle V to the right side of the vehicle V, the second internal speaker32in operation continues to output the warning sound and a third internal speaker33is additionally operated. Accordingly, the warning sound is output not only from the second internal speaker32, but also from the third internal speaker33, so that the driver can identify that the pedestrian P has moved from the front right side of the vehicle V to the right side of the vehicle V through the change of the warning sound.

FIGS. 7 and 8are views for illustrating changes in the volume of a warning sound according to the distance between a vehicle and a pedestrian in a pedestrian warning device of a vehicle according to an embodiment of the present invention.

Referring toFIGS. 7 and 8, when the pedestrian P moves from the front right side of the vehicle V to the right side of the vehicle V, the warning sounds are output using the external speaker and the internal speaker, respectively, and the volumes of the output warning sounds can be adjusted based on the distance between the pedestrian P and the vehicle V (L1, L2, L1>L2).

That is, as the distance between the vehicle V and the pedestrian P moved from the front right side of the vehicle V to the right side of the vehicle V decreases, the volume levels of the output warning sounds are raised such that a great volume of warning sound is provided to the driver and the pedestrian P. The pedestrian P and the driver can recognize the positions of the pedestrian and the vehicle more accurately by taking into consideration the change of the volume as well as the change of the direction of the warning sound.

FIGS. 9 and 10are views for illustrating changes in the direction and volume of a warning sound outputted for each pedestrian position when a pedestrian located at the front left side of the vehicle moves to the front right side of the vehicle in a pedestrian warning device of a vehicle according to an embodiment of the present invention.

Referring toFIGS. 9 and 10, when the pedestrian located on the front left side of the vehicle V moves to the front right side of the vehicle V, not only the positions of the pedestrian and the vehicle are recognized by the warning sounds outputted using the external speaker and the internal speaker, but also as the distance between the pedestrian and the vehicle gets closer according to the movement of the pedestrian, the volume of the warning sound is changed by increasing the volume of the warning sound so that the driver and the pedestrian can more accurately recognize the position of the pedestrian and the vehicle, respectively.

As is apparent from the above, the pedestrian warning device of a vehicle according to the embodiment of the present invention can prevent an accident between the vehicle and the pedestrian in advance by notifying the driver of the moved position of the pedestrian by changes of the direction and volume of the output warning sound using a plurality of internal speakers in the inside of the vehicle.

The pedestrian warning device of a vehicle according to the embodiment of the present invention can prevent an accident between the vehicle and the pedestrian more in advance by notifying the driver of the moved position of the pedestrian by changes of the direction and volume of the output warning sound using a plurality of internal speakers in the inside of the vehicle, and by notifying the pedestrian of the position of the vehicle by changes of the direction and volume of the output warning sound using a plurality of external speakers oriented to various directions of the outside of the vehicle.