KR101478951B1 - Method and System for Pedestrian Safety using Inaudible Acoustic Proximity Alert Signal - Google Patents

Method and System for Pedestrian Safety using Inaudible Acoustic Proximity Alert Signal Download PDF

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Publication number
KR101478951B1
KR101478951B1 KR20140089476A KR20140089476A KR101478951B1 KR 101478951 B1 KR101478951 B1 KR 101478951B1 KR 20140089476 A KR20140089476 A KR 20140089476A KR 20140089476 A KR20140089476 A KR 20140089476A KR 101478951 B1 KR101478951 B1 KR 101478951B1
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KR
South Korea
Prior art keywords
vehicle
pedestrian
audible frequency
portable terminal
acoustic signal
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Application number
KR20140089476A
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Korean (ko)
Inventor
이상철
이보원
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인하대학교 산학협력단
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q5/00—Arrangement or adaptation of acoustic signal devices
    • B60Q5/005—Arrangement or adaptation of acoustic signal devices automatically actuated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q9/00—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0134—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to imminent contact with an obstacle, e.g. using radar systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B60R21/01566—Devices for warning or indicating mode of inhibition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians

Abstract

Suggested are a method and a system for notifying the safety of pedestrians by generating an inaudible proximity warning signal. The method for notifying the safety of pedestrians by generating an inaudible proximity warning signal, which is suggested in the present invention, includes a step in which a vehicle being driven detects a pedestrian or an obstacle around the vehicle, a step in which whether the obstacle or pedestrian exists in a preset range from the vehicle is determined, a step in which the vehicle actively generates a sound signal in an inaudible frequency area when the obstacle or the pedestrian exists in the preset range from the vehicle, a step in which a portable terminal of the pedestrian receives the sound signal in the inaudible frequency area generated from the vehicle, and a step in which the portable terminal of the pedestrian receiving the sound signal in the inaudible frequency area generates a warning sound in an audible frequency area.

Description

TECHNICAL FIELD [0001] The present invention relates to a method and system for pedestrian safety notification using a non-audible proximity warning signal,

The present invention relates to a method and system for the safety of a pedestrian in a position close to a vehicle.

When a pedestrian is listening to music or making a phone call through a portable terminal while walking, it is difficult for the pedestrian to hear the sound of the vehicle coming close to the surroundings. And, there is a problem that can lead to a pedestrian accident. In the case of hybrid or electric vehicles, which are in increasing demand in recent years, vehicle noise is very low, which makes it difficult to hear the sounds of vehicles coming close to pedestrians. At this time, if a nearby vehicle sounds a horn in the audible frequency range, a nearby pedestrian can detect it, but it is often necessary to inform the pedestrian without sounding a horn. For example, in a densely populated area, in a residential area, or when a driver can not see a pedestrian, he should be able to inform the pedestrian that the vehicle is approaching without sounding a horn. Accordingly, there is a need for a method for automatically transmitting an acoustic signal of an audible frequency from a vehicle to notify a pedestrian of a nearby vehicle without sounding a horn when the pedestrian is close to the vehicle.

SUMMARY OF THE INVENTION The present invention provides a method and system for preventing an accident that may occur due to difficulty in hearing a sound of a vehicle approaching the vicinity of a pedestrian when a pedestrian is listening to music or making a telephone call through a portable device . In other words, it is intended to provide a method and system for informing pedestrians that a vehicle is approaching without sounding a horn.

According to an aspect of the present invention, there is provided a pedestrian safety notification method using an audible proximity warning signal generated by the present invention, comprising: detecting an obstacle or a pedestrian around the vehicle; Generating acoustic signals in the vehicle in an inactive audible frequency range when the obstacle or the pedestrian is within a predetermined range from the vehicle, generating the acoustic signal in the non-audible frequency range generated from the vehicle, The portable terminal of the pedestrian receiving acoustic signals of the pedestrian, and the portable terminal of the pedestrian receiving the acoustic signal of the non-audible frequency region, generating an alarm sound in the audible frequency range.

The step of receiving the acoustic signal in the non-audible frequency range generated from the vehicle is performed when the MEMS microphone embedded in the portable terminal is in a state in which the pedestrian makes a call or hears music through the headset, It is possible to receive acoustic signals in the blue frequency range.

Wherein the step of receiving the acoustic signal of the non-audible frequency region generated from the vehicle includes a step of detecting a positional relationship between the portable terminal and the acoustic signal of the non-audible frequency region, It is possible to determine from which direction the signal comes from the pedestrian.

The step of the portable terminal of the pedestrian receiving the acoustic signal in the non-audible frequency region generates the alarm sound in the audible frequency region, the positional information on the acoustic signal of the non-audible frequency region is recognized by the portable terminal, And inform the pedestrian of the alarm sound in the audio frequency range including the position information through the 3D audio.

According to another aspect of the present invention, there is provided a pedestrian safety alert system for generating a non-audible proximity warning signal according to an embodiment of the present invention. The pedestrian safety alert system includes an obstacle or a pedestrian around the vehicle, A vehicle sensing unit for actively generating an acoustic signal in the non-audible frequency region, an acoustic signal in a non-audible frequency region generated from the vehicle sensing unit to generate an audible alarm in the audible frequency region, Lt; RTI ID = 0.0 > a < / RTI > portable terminal.

Wherein the vehicle detection unit comprises: a sensor for detecting an obstacle or a pedestrian around the vehicle, the vehicle being mounted with the vehicle sensing unit; a distance determination unit for determining whether the obstacle or the pedestrian is within a predetermined range from the vehicle; Or a non-audible frequency range acoustic signal generator that actively generates acoustic signals in the non-audible frequency range when the pedestrian is within a predetermined range from the vehicle.

Wherein the portable terminal includes a receiver for receiving an acoustic signal in an invisible frequency region generated from the vehicle when the pedestrian having the portable terminal is within a predetermined range from a vehicle in motion, And an alarm unit for generating an alarm sound in the audible frequency region to notify the pedestrian.

The receiving unit may determine a positional relationship between the pedestrian having the portable terminal and the acoustic signal in the non-audible frequency region, and determining from which direction the acoustic signal in the non-audible frequency region comes from the upper pedestrian.

The announcement unit can recognize the position information of the acoustic signal in the non-audible frequency region and notify the pedestrian of the alarm sound in the audible frequency region including the positional information through the 3D audio.

According to embodiments of the present invention, a pedestrian receives a non-audible frequency-domain acoustic signal through a microphone built in a portable terminal used by a pedestrian, and actively transmits an acoustic signal in an audible frequency range to a pedestrian through a speaker or earphone The proximity of the vehicle can be notified. Again, pedestrians can prevent accidents more effectively by moving in an immediate direction away from the approaching vehicle without instinctively visual confirmation.

1 is a flowchart illustrating a pedestrian safety notification method using an acoustic signal in a non-audible frequency range according to an embodiment of the present invention.
2 is a view for explaining a process of informing a pedestrian when a vehicle is approaching a pedestrian according to an embodiment of the present invention.
3 is a block diagram illustrating a pedestrian safety notification system using an acoustic signal in a non-audible frequency region according to an embodiment of the present invention.

The proposed invention is a description of the safety of pedestrians in close proximity to the vehicle. When a pedestrian is listening to music or making a phone call through a portable terminal while walking, it is difficult for the pedestrian to hear the sound of the vehicle approaching the surroundings. And, there is a problem that can lead to a pedestrian accident. Hybrid or electric vehicles, which are in increasing demand in recent years, can cause even greater problems as vehicle noise is very low. Generally, when a vehicle comes close to a pedestrian, a nearby pedestrian can sense it if the vehicle sounds a horn in the audible frequency range. However, when a pedestrian is listening to music or making a phone call through a portable terminal, it is often difficult to notice even if the vehicle sounds the horn in the audible frequency range, so it is often necessary to inform the pedestrian without sounding the horn. For example, in a densely populated area, in a residential area, or when a driver does not see a pedestrian, a way to inform the pedestrian that the vehicle is approaching without sounding a horn is needed. The proposed invention is a technology for automatically informing a pedestrian of a vehicle approaching a pedestrian without sounding a horn. When the pedestrian is close to the vehicle, the acoustic signal of the audible frequency can be transmitted from the vehicle. Such a signal can be received through a microphone built in a portable terminal in use by a pedestrian so that the portable terminal can generate acoustic signals in the audible frequency range. Then, the proximity of the vehicle can be actively informed by transmitting the acoustic signal in the audible frequency range to the pedestrian through a speaker or an earphone. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart illustrating a pedestrian safety notification method using an acoustic signal in a non-audible frequency range according to an embodiment of the present invention.

A pedestrian safety notification method using acoustic signals in a non-audible frequency range includes a step 110 of detecting an obstacle or a pedestrian around the vehicle in a driving vehicle, determining whether the obstacle or the pedestrian is within a predetermined range from the vehicle (130) actively generating an audible signal in an in-vivo frequency domain in the vehicle (130) when the obstacle or the pedestrian is within a predetermined range from the vehicle, A step 140 of receiving the acoustic signal of the pedestrian from the pedestrian's frequency range, and a step 150 of generating the alarm sound of the audible frequency range by the portable terminal of the pedestrian receiving the acoustic signal of the non- .

At step 110, a vehicle in motion can detect obstacles or pedestrians around the vehicle. At this time, proximity sensors mounted on the front and rear surfaces of the vehicle can be used to detect obstacles or pedestrians around the vehicle.

For example, recently released vehicles are equipped with proximity sensors using ultrasound or laser on the front and rear of the vehicle. This is mainly used to inform the driver of the proximity beep in relation to parking, but may also be used for the proposed method. In addition, a variety of recently added sensors (such as a camera or depth sensor) can also be used to detect pedestrians. Unmanned vehicles, which are in the limelight in recent years, are basically equipped with the technology for sensing pedestrians, so that no additional devices or systems are required for the proposed method.

The portable terminal can use the information that the vehicle provides using a local area network (e.g., bluetooth, nfc, etc.) to notice the proximity of the vehicle. Further, when the vehicle does not have such a function, the noise of the vehicle can be sensed from the built-in microphone of the portable terminal to detect the proximity of the vehicle. In this way, when the proximity of the vehicle is difficult to detect, the acoustic signal of the audible frequency can be actively transmitted from the vehicle and can be detected by the built-in microphone of the portable device.

In step 120, it is possible to determine whether the obstacle or the pedestrian is within a predetermined range from the vehicle. When the vehicle being driven detects an obstacle or a pedestrian around the vehicle and the pedestrian is within a predetermined range, an operation may be performed to notify the pedestrian of the proximity vehicle.

On the other hand, when the vehicle being driven detects obstacles or pedestrians around the vehicle and the vehicle is not within the predetermined range, the vehicle can be continuously driven.

If the obstacle or the pedestrian is within a predetermined range from the vehicle, then in step 130, the vehicle may be actively generating acoustic signals in the non-audible frequency range. For this purpose, a specific encoded signal can be synchronized with the acoustic signal of the non-audible frequency band by using a communication technique based on the acoustic signal of the prior art. Since the signal does not contain much information, it can be sent using a very simple algorithm.

In step 140, the portable terminal of the pedestrian can receive an acoustic signal in the non-audible frequency range generated from the vehicle. At this time, when the MEMS microphone embedded in the portable terminal makes a call or hears music through the headset, the microphone can receive the acoustic signal in the non-audible frequency range. In addition, the positional relationship between the portable terminal and the acoustic signal in the non-audible frequency region can be grasped to determine from which direction the acoustic signal in the non-audible frequency region comes from the pedestrian.

For example, a recently released portable terminal can embed a plurality of microphones. Such a plurality of microphones can usually be manufactured by the MEMS method for high yield and uniformity of characteristics. One of the characteristics of MEMS microphones is high sensitivity in the high frequency range and therefore it is easy to receive acoustic signals in the non-audible frequency (quasi-ultrasonic range, 16 ~ 20kHz). The microphone built in the portable terminal can be operated when the user speaks or hears the music through the headset, thereby confirming whether or not a signal transmitted by a neighboring vehicle in the non-audible frequency range is received.

In addition, the directionality of the transmitted signal can be detected. For example, in recent portable terminals, at least two or three microphones may be installed in various parts of the main body. Based on the plurality of microphones, it is possible to detect whether or not the signal transmitted from the vehicle is received, and in which direction the signal is generated based on the portable terminal. More specifically, when the direction of sound generation, that is, the orientation of the portable terminal is known to be related to the pedestrian, it is possible to know from which direction the generated signal comes from the pedestrian. Then, this direction information can also be detected.

In step 150, the portable terminal of the pedestrian receiving the acoustic signal in the non-audible frequency range may generate an audible alarm in the audible frequency range. At this time, the portable terminal can recognize the position information of the acoustic signal of the non-audible frequency region and notify the pedestrian of the alarm sound of the audible frequency region including the position information through the 3D audio.

In other words, the portable terminal of the pedestrian analyzes the position of the proximity vehicle and uses the 3D audio technology to determine from which direction the proximity vehicle approaches (for example, behind the pedestrian, left, right or front) So that it can be audibly informed. This allows pedestrians to move away from the approaching vehicle in an immediate direction without instinctively performing a visual check to prevent accidents more effectively. Location information is important because pedestrians move away from the direction in which the sound is generated when the pedestrian hears the sound, and thus the probability of pedestrian accident can be innovatively lowered. In addition, when the portable terminal can not grasp the position information of the acoustic signal in the non-audible frequency range, or if the pedestrian does not wear the headset, the portable terminal can notify the pedestrian only of the alarm sound in the audible frequency range without the positional information .

For example, if the proximity of the vehicle is detected by the pedestrian's handheld terminal, this information may be audible in the audible frequency band through the earphone or headset in use by the user. In addition, when a pedestrian uses a wearable device such as a smart watch, it is possible to inform the pedestrian of the risk of safety by using various methods (for example, vibration of a smart watch).

2 is a view for explaining a process of informing a pedestrian when a vehicle is approaching a pedestrian according to an embodiment of the present invention.

For example, a traveling vehicle 210 may sense obstacles or pedestrians 220 around the vehicle. At this time, proximity sensors mounted on the front and rear surfaces of the vehicle 210 may be used to detect an obstacle or a pedestrian 220 around the vehicle.

Then, it is possible to determine whether the obstacle or the pedestrian 220 is within the predetermined range R 240 from the vehicle 210. When the vehicle being driven detects an obstacle or a pedestrian around the vehicle and the pedestrian is within a predetermined range, an operation may be performed to notify the pedestrian of the proximity vehicle.

An acoustic signal 250 in the vehicle 210 may be actively generated in the non-audible frequency region when the obstacle or the pedestrian 220 is within the predetermined range R 240 from the vehicle 210. Then, the portable terminal 230 of the pedestrian can receive the acoustic signal 250 of the non-audible frequency range generated from the vehicle 210. It is also possible to determine the positional relationship between the portable terminal 230 and the acoustic signal 250 in the non-audible frequency region and determine from which direction the acoustic signal 258 in the non-audible frequency region comes from the pedestrian 220 .

The portable terminal 230 of the pedestrian receiving the acoustic signal 250 in the non-audible frequency region can generate an alarm sound in the audible frequency region. The alarm sound in the audible frequency range can be transmitted to the user through an earphone or headset 231 connected to the portable terminal. Further, it may be transmitted to the user through another similar method such as vibration or notification of the portable terminal 230. At this time, the portable terminal 230 grasps the position information that the acoustic signal 250 in the non-audible frequency region approaches, and transmits the alarm sound in the audible frequency range including the positional information to the pedestrian 220). When the portable terminal 230 can not grasp the positional information of the acoustic signal 250 in the non-audible frequency region, or if the pedestrian does not wear the headset, only the alarm sound in the audible frequency range is transmitted to the pedestrian (220).

3 is a block diagram illustrating a pedestrian safety notification system using an acoustic signal in a non-audible frequency region according to an embodiment of the present invention.

The pedestrian safety notification system using the acoustic signals in the non-audible frequency range may include the vehicle sensing unit 310 and the portable terminal 320. [

The vehicle sensing unit 310 can actively generate an acoustic signal in the non-audible frequency region when the vehicle under operation detects an obstacle or a pedestrian around the vehicle and the obstacle or the pedestrian is within a predetermined range from the vehicle have. The vehicle sensing unit 310 may include a sensing sensor 311, a distance determination unit 312, and a non-audible frequency region acoustic signal generating unit 313.

The detection sensor 311 may be configured to detect an obstacle or a pedestrian around the vehicle when the vehicle on which the vehicle sensing unit 310 is mounted. For example, recently released vehicles are equipped with proximity sensors using ultrasound or laser on the front and rear of the vehicle. This is mainly used to inform the driver of the proximity beep in relation to parking, but may also be used for the proposed system. In addition, a variety of recently added sensors (such as a camera or depth sensor) can also be used to detect pedestrians. Unmanned vehicles, which are in the limelight in recent years, are basically equipped with a pedestrian sensing technology, so that the proposed system does not require additional devices or systems.

The portable terminal can use the information that the vehicle provides using a local area network (e.g., bluetooth, nfc, etc.) to notice the proximity of the vehicle. Further, when the vehicle does not have such a function, the noise of the vehicle can be sensed from the built-in microphone of the portable terminal to detect the proximity of the vehicle. In this way, when the proximity of the vehicle is difficult to detect, the acoustic signal of the audible frequency can be actively transmitted from the vehicle and can be detected by the built-in microphone of the portable device.

The distance determination unit 312 may determine whether the obstacle or the pedestrian is within a predetermined range from the vehicle. When the vehicle being driven detects an obstacle or a pedestrian around the vehicle and the pedestrian is within a predetermined range, an operation may be performed to notify the pedestrian of the proximity vehicle.

On the other hand, when the vehicle being driven detects obstacles or pedestrians around the vehicle and the vehicle is not within the predetermined range, the vehicle can be continuously driven.

The non-audible frequency range acoustic signal generating section 313 can actively generate the acoustic signal 330 in the non-audible frequency region when the obstacle or the pedestrian is within a predetermined range from the vehicle. The non-audible frequency range acoustic signal generating unit 313 can transmit the specific encoded signal based on the acoustic signal by synchronizing the specific encoded signal with the acoustic signal 330 in the non-audible frequency range.

The portable terminal 320 can receive an acoustic signal in the non-audible frequency region generated from the vehicle sensing unit, generate an alarm sound in the audible frequency region, and inform the pedestrian. The portable terminal 320 may include a receiving unit 321 and a notification unit 322.

The receiving unit 321 can receive the acoustic signal 330 in the non-audible frequency region generated from the vehicle when the pedestrian having the portable terminal 320 is within a predetermined range from the vehicle in motion. The receiving unit 321 may operate when the MEMS microphone of the receiving unit 321 hears the music through the headset or the pedestrian is talking to receive the acoustic signal 330 in the non-audible frequency region. The receiving unit 321 detects the positional relationship between the pedestrian having the portable terminal 320 and the acoustic signal 330 in the non-audible frequency region, and outputs the acoustic signal 330 in the non- It is possible to determine from which direction it is coming from.

For example, at this time, the MEMS microphone embedded in the portable terminal can operate when the pedestrian makes a call or hears music through the headset, thereby receiving the acoustic signal in the non-audible frequency range. In addition, the positional relationship between the portable terminal and the acoustic signal in the non-audible frequency region can be grasped to determine from which direction the acoustic signal in the non-audible frequency region comes from the pedestrian.

For example, a recently released portable terminal can embed a plurality of microphones. Such a plurality of microphones can usually be manufactured by the MEMS method for high yield and uniformity of characteristics. One of the characteristics of MEMS microphones is high sensitivity in the high frequency range and therefore it is easy to receive acoustic signals in the non-audible frequency (quasi-ultrasonic range, 16 ~ 20kHz). The microphone built in the portable terminal can be operated when the user speaks or hears the music through the headset, thereby confirming whether or not a signal transmitted by a neighboring vehicle in the non-audible frequency range is received.

In addition, the directionality of the transmitted signal can be detected. For example, in recent portable terminals, at least two or three microphones may be installed in various parts of the main body. Based on the plurality of microphones, it is possible to detect whether or not the signal transmitted from the vehicle is received, and in which direction the signal is generated based on the portable terminal. More specifically, when the direction of sound generation, that is, the orientation of the portable terminal is known to be related to the pedestrian, it is possible to know from which direction the generated signal comes from the pedestrian. Then, this direction information can also be detected.

After receiving the acoustic signal 330 in the non-audible frequency region, the notification unit 322 can generate an alarm sound in the audible frequency region and inform the pedestrian. The notification unit 322 can recognize the position information of the acoustic signal 330 in the non-audible frequency region and inform the pedestrian of the alarm sound in the audible frequency region including the positional information through the 3D audio . At this time, if the position information of the acoustic signal 330 in the non-audible frequency region is not grasped, or if the pedestrian does not wear the headset, only the alarm sound in the audible frequency range can be notified to the pedestrian have.

In other words, the portable terminal of the pedestrian analyzes the position of the proximity vehicle and uses the 3D audio technology to determine from which direction the proximity vehicle approaches (for example, behind the pedestrian, left, right or front) So that it can be audibly informed. This allows pedestrians to move away from the approaching vehicle in an immediate direction without instinctively performing a visual check to prevent accidents more effectively. Location information is important because pedestrians move away from the direction in which the sound is generated when the pedestrian hears the sound, and thus the probability of pedestrian accident can be innovatively lowered. In addition, when the portable terminal can not grasp the position information of the acoustic signal in the non-audible frequency range, or if the pedestrian does not wear the headset, the portable terminal can notify the pedestrian only of the alarm sound in the audible frequency range without the positional information .

For example, if the proximity of the vehicle is detected by the pedestrian's handheld terminal, this information may be audible in the audible frequency band through the earphone or headset in use by the user. In addition, when a pedestrian uses a wearable device such as a smart watch, it is possible to inform the pedestrian of the risk of safety by using various methods (for example, vibration of a smart watch).

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the apparatus and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable array (FPA) A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed on a networked computer device and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it should be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described devices, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (8)

In the pedestrian safety notification method,
Detecting an obstacle or a pedestrian around the vehicle;
Determining whether the obstacle or the pedestrian is within a predetermined range from the vehicle;
Generating an acoustic signal in an area of the non-audible frequency region actively in the vehicle when the obstacle or the pedestrian is within a predetermined range from the vehicle;
Receiving acoustic signals of the non-audible frequency range generated from the vehicle by the portable terminal of the pedestrian; And
The portable terminal of the pedestrian who has received the acoustic signal in the non-audible frequency region generates an alarm sound in the audible frequency region
Lt; / RTI >
Sensing a noise of the vehicle using a plurality of microphones built in a portable terminal of the pedestrian when the vehicle in motion can not detect a pedestrian around the vehicle; And
The portable terminal of the pedestrian generates an alarm sound in the audible frequency range when the vehicle is within a predetermined range
Further comprising:
Wherein the step of receiving the acoustic signal in the non-audible frequency range generated from the vehicle by the portable terminal of the pedestrian,
A positional relationship between the portable terminal and an acoustic signal in the non-audible frequency region is grasped by using a plurality of microphones embedded in the portable terminal of the pedestrian, and whether or not the acoustic signal generated by the vehicle is received, Detecting in which direction the portable terminal is generated based on the portable terminal
The pedestrian safety notification method comprising: The method according to claim 1,
Wherein the step of receiving the acoustic signal in the non-audible frequency range generated from the vehicle by the portable terminal of the pedestrian,
A plurality of microphones built in the portable terminal operate when the pedestrian makes a call or hears music through a headset to receive acoustic signals in the non-audible frequency range
Pedestrian safety notification method. delete The method according to claim 1,
The step of the portable terminal of the pedestrian receiving the acoustic signal in the non-audible frequency range to generate an alarm sound in the audible frequency range
The portable terminal recognizes the position information of the acoustic signal of the non-audible frequency region and informs the pedestrian of the alarm sound of the audible frequency region including the positional information through the three-
Pedestrian safety notification method. In a pedestrian safety notification system,
A vehicle sensing unit that actively generates an acoustic signal in the non-audible frequency region when the vehicle in motion senses an obstacle or a pedestrian around the vehicle and the obstacle or the pedestrian is within a predetermined range from the vehicle; And
An audible sound in an audible frequency range is generated by receiving an acoustic signal in the non-audible frequency region generated from the vehicle sensing unit,
/ RTI >
The portable terminal includes:
Wherein the controller detects a noise of the vehicle by using a microphone built in the portable terminal when the vehicle being driven can not detect a pedestrian around the vehicle,
Generates an alarm sound in an audible frequency range when the vehicle is within a predetermined range,
And a control unit configured to determine a positional relationship between the portable terminal and an acoustic signal in the non-audible frequency region by using a plurality of microphones built in the portable terminal, determine whether or not the acoustic signal generated by the vehicle is received, It is possible to detect in which direction the portable terminal is based
Pedestrian safety alert system. 6. The method of claim 5,
The vehicle-
A sensing sensor for sensing a vehicle or an obstacle around the vehicle, the sensing device being mounted on the vehicle sensing unit;
A distance determination unit for determining whether the obstacle or the pedestrian is within a predetermined range from the vehicle; And
A non-audible frequency range acoustic signal generator for generating an audible signal in the non-audible frequency range actively when the obstacle or the pedestrian is within a predetermined range from the vehicle;
The pedestrian safety alert system comprising: 6. The method of claim 5,
The portable terminal includes:
A receiving unit for receiving an acoustic signal in an inhabitant frequency region generated from the vehicle when the pedestrian having the portable terminal is within a predetermined range from the vehicle being driven; And
A notification unit for receiving an acoustic signal in the non-audible frequency region and generating an alarm sound in an audible frequency region to inform the pedestrian
The pedestrian safety alert system comprising: 8. The method of claim 7,
Wherein,
Recognizes positional information of the acoustic signal in the non-audible frequency range, and notifies the pedestrian of an alarm sound in the audible frequency range including the positional information through three-dimensional audio
Pedestrian safety alert system.
KR20140089476A 2014-07-16 2014-07-16 Method and System for Pedestrian Safety using Inaudible Acoustic Proximity Alert Signal KR101478951B1 (en)

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