KR20140029613A - Apparatus and method for generating of warning sound - Google Patents

Apparatus and method for generating of warning sound Download PDF

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Publication number
KR20140029613A
KR20140029613A KR1020120094600A KR20120094600A KR20140029613A KR 20140029613 A KR20140029613 A KR 20140029613A KR 1020120094600 A KR1020120094600 A KR 1020120094600A KR 20120094600 A KR20120094600 A KR 20120094600A KR 20140029613 A KR20140029613 A KR 20140029613A
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South Korea
Prior art keywords
vehicle
warning sound
information
frequency
beep
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KR1020120094600A
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Korean (ko)
Inventor
김재헌
이재민
구성채
이민섭
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엘지전자 주식회사
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Publication of KR20140029613A publication Critical patent/KR20140029613A/en

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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

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  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The present invention relates to an apparatus and a method for generating a warning sound in an environmentally friendly energy vehicle.
In the warning sound generating device according to an embodiment of the present invention, the input unit for receiving the operation information and location information of the vehicle; A storage unit including location information of the vehicle and warning sound generation information corresponding to the location information; A controller for detecting a frequency according to mechanical noise of a vehicle based on the input operation information, checking band information of the detected frequency, and checking a warning sound level corresponding to the vehicle position information; An audio generation unit for acquiring frequency information detected by the control unit, giving an interval value corresponding to the position information, and adjusting the frequency to which the addition value is applied to a predetermined level to generate a warning sound; And an output unit for outputting the generated audio.

Description

Apparatus and method for generating of warning sound}

The present invention relates to an apparatus and a method for generating a warning sound in an environmentally friendly energy vehicle.

A car that is driven by an internal combustion engine such as a general car, an engine bicycle or a scooter, runs idle even when stopped, generates a lot of noise while driving, and some models turn on the brakes and stop the engine after a predetermined time to reduce fuel consumption or noise. It provides a function to prevent the occurrence. However, in an electrically driven vehicle such as an electric vehicle or a hybrid vehicle, the motor rotates or stops by the driver's operation.

In addition, a vehicle that is driven only by a rechargeable battery may be used at a low speed, but may cause a slight collision when approaching from behind a pedestrian or not seen.

Electric cars, etc., have little noise, so the driver needs to operate an alarm sound that often sounds a horn when meeting a pedestrian. In addition, pedestrians need to pay more attention to the proximity of the vehicle because the noise generated by the nature of the electric vehicle is less.

In order to solve the above problems, there is a conventional type of technology having a device for generating a virtual sound effect for the safety and convenience of the driver and pedestrian in the electric vehicle. The prior art has a form in which audio similar to a horn sound or an engine sound of a vehicle is previously stored, and the stored audio is output when a user request or an electric vehicle is driven.

The electric vehicle audio of the above type should store outputable audio data occupying a capacity in the internal memory of the electric vehicle. In addition, since the stored audio data is limited, it is difficult to output various engine sounds or engine sounds according to a change in the state of the vehicle.

The present invention provides an engine sound generating apparatus and method for providing recognition that a vehicle is in proximity to a pedestrian's vicinity.

The present invention also provides an engine sound generating apparatus and method for allowing a driver to determine the change in speed according to the movement of the vehicle as a sound.

Warning sound generating device according to an embodiment of the present invention includes an input unit for receiving the operation information and location information of the vehicle; A storage unit including location information of the vehicle and warning sound generation information corresponding to the location information; A controller for detecting a frequency according to mechanical noise of a vehicle based on the input operation information, checking band information of the detected frequency, and checking a warning sound level corresponding to the vehicle position information; An audio generation unit for acquiring frequency information detected by the control unit, giving an interval value corresponding to the position information, and adjusting the frequency to which the addition value is applied to a predetermined level to generate a warning sound; And an output unit for outputting the generated audio.

In addition, an automobile according to an embodiment of the present invention includes a starting motor for operating an engine; An engine providing energy required for driving and driving of the vehicle and generating engine noise of a predetermined frequency; A location sensor for obtaining location information of the vehicle; A control unit for acquiring operation information of the vehicle and outputting operation information of the vehicle and position information of the vehicle to a warning sound generator; And a warning sound generation unit for acquiring operation information and location information of the vehicle from the control unit and generating a warning sound based on the obtained information.

In addition, the warning sound generating method according to an embodiment of the present invention comprises the steps of obtaining the engine noise frequency and position information according to the driving state of the vehicle; Generating a warning sound by providing a period-specific addition value corresponding to the position information to the obtained frequency and adjusting the predetermined frequency to a predetermined level; And outputting the generated warning sound.

According to the present invention, the apparatus and method for generating the engine sound for the safety of pedestrians, it is possible to determine the speed change according to the movement of the car to the driver as a sound, and has an effect of enhancing the auditory satisfaction of the driver.

1 is an internal block diagram of an electric vehicle to which an embodiment of the present invention is applied.
2 is a detailed block diagram of a warning sound generating unit according to an exemplary embodiment of the present invention.
3 is a flowchart illustrating a warning sound generation operation according to an exemplary embodiment of the present invention.
4 is a flowchart illustrating a warning sound generation operation according to an exemplary embodiment of the present invention.
5 is an exemplary table illustrating an example of a modulation application value applied when generating a warning sound according to an embodiment of the present invention.
6 is an exemplary table illustrating an example of a warning sound level according to a vehicle location according to an exemplary embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Vehicles to which the present invention is applied may include noise-free, low-noise cars, such as environmentally friendly energy vehicles, including electric vehicles, hybrid vehicles, fuel cell vehicles, and the like.

In the embodiment of the present invention, a configuration and operation of an electric vehicle among noise-free, low-noise eco-friendly energy vehicles will be described as an example.

In addition to the electric vehicle illustrated according to an embodiment of the present invention, the present invention may be applied to the various noiseless and low noise vehicles described above.

1 is an internal block diagram of an electric vehicle to which an embodiment of the present invention is applied.

Referring to FIG. 1, an electric vehicle 100, which is an example of a vehicle to which a device for generating a warning sound according to an embodiment of the present invention is applied, includes an engine 110, a motor 120, an HSG 130, and a power supply 140. ), A transmission 150, a cluster 160, a vehicle controller 170, a position sensor 180, a sensing unit 190, and a warning sound generator 200.

An electric vehicle to which an embodiment of the present invention is applied may be driven and driven by a starting motor 130 for operating the engine 110 and the electric motor 120 at a constant speed.

The vehicle controller 170 may control driving and driving of the vehicle. The vehicle controller 170 may detect a state according to driving of the engine and driving of the vehicle, and may control the warning sound generator 200 to generate a warning sound according to the state of the vehicle. In addition, the control unit outputs the location information collected periodically or in real time to the warning sound generating unit 200 so as to generate and output a warning sound corresponding to the location and state of the vehicle.

The position sensing unit 180 may include a module for obtaining a position of the vehicle. A representative example is a Global Positioning System (GPS) module. The position detecting unit 180 according to an embodiment of the present invention detects the position of the vehicle periodically or in real time, and based on the position information detected by the position detecting unit 180 when generating the warning sound in the warning sound generating unit 200. The level of warning sound and the type of warning sound may be generated differently and output.

The sensing unit 190 may include a sensor for detecting the speed of the vehicle, a sensor for detecting the speed of the engine, and a sensor for detecting the proximity of the pedestrian.

The sensor for detecting the speed of the vehicle and the speed of the engine may detect the driving state and the driving state of the vehicle, and may output the detected result to the warning sound generator 200. In addition, the sensor for detecting the proximity of the pedestrian may be a proximity sensor or an ultrasonic sensor. Therefore, an object existing outside the pedestrian or the vehicle may be detected and the detection signal may be output to the warning sound generator 200.

The warning sound generator 200 implemented in the vehicle 100 may warn the pedestrian of the vehicle approach by generating a warning sound through a speaker mounted on the vehicle 100 during motor driving or stopping.

The warning sound generating unit 200 may receive the location information of the vehicle detected from the location detecting unit 180. In addition, the sensing unit 1900 may receive a detection signal for the speed and engine speed of the vehicle sensed in the transmission 150 and the cluster.

In particular, the warning sound generating unit 200 according to an embodiment of the present invention may check the location information where the vehicle is located and the driving state of the vehicle to generate a warning sound suitable for the position and the state of the vehicle.

2 is a detailed block diagram of a warning sound generating unit according to an exemplary embodiment of the present invention.

The configuration of the warning sound generating unit 200 for generating the warning sound output from the vehicle 100 according to the embodiment of the present invention described above will be described with reference to FIG. 2.

Warning sound generating unit 200 according to an embodiment of the present invention is the input unit (@ 10), the control unit 220, the storage unit 230, the audio generating unit 240, the amplifier (AMP 250) and the speaker 260 ) May be included.

The input unit 210 may receive a motion detection signal of a transmission 150, a speed signal of a vehicle, and a location detection signal of a vehicle, which are received from the position sensing unit 180 and the sensing unit 190. In particular, the input unit 210 according to an embodiment of the present invention may obtain the PRM information, speed information, location information, etc. of the vehicle in order to generate a warning sound from the audio generator 240.

The controller 220 may control to generate a warning sound based on the information input through the input unit 210, and may control the generated warning sound to be output through the speaker 260. In addition, the controller 220 stores the information input through the input unit in the storage unit 230, reads the alarm sound level information according to the location information stored in the storage unit 230, or read the pre-stored warning sound to the speaker 260 Can be controlled to output through.

In addition, the controller 220 may check the frequency of each engine order according to the RPM information among the state information of the vehicle obtained from the input unit 210.

The mechanical sound of the automobile, which mainly constitutes the noise of the automobile, is coupled with the noise generated by side-to-side movement of the piston during the engine stroke and the torsional vibration of the crankshaft. impact due to fluctuating forces and noise generated by vibration.

When the n-cylinder four-stroke engine operates at N rpm, the fundamental frequency may be expressed as Equation 1 below.

Figure pat00001

N / 60 is the engine speed expressed in frequency (Hz) and can be represented as / 2 because the crankshaft rotates twice per engine stroke.

The spectrum of intake and exhaust noise can often be expressed in engine order generalized to N / 60.

For example, for a four-cylinder engine, the secondary components (2 nd Order) This is a fundamental frequency there is to be a fundamental frequency difference component 3 (3 rd Order) for a 6-cylinder.

Therefore, according to an embodiment of the present invention, the frequency band checked by the controller 220 may be a frequency band when the peak components are expressed as sinusoids in consideration of the engine order.

The control unit 220 may check the frequency of the peak components represented by the engine order, the mechanical noise generated by the piston reciprocating motion inside the vehicle 100. The identified frequency may be different according to the state of the RPM, thereby generating a warning sound having a weight by separating the frequency band.

The storage unit 230 may store various warning sound generation information corresponding to vehicle location information for applying to the warning sound generated by the audio generator 240.

The storage unit 230 may store the level of the warning sound corresponding to the position of the vehicle obtained by the position detecting unit 180 according to an embodiment of the present invention. In addition, when the warning sound corresponding to the location of the vehicle is downloaded from the outside, the storage unit 230 may store the downloaded warning sound by matching the location information of the vehicle and the corresponding warning sound level.

In addition, the storage unit 230 may store weight information to be applied to the warning sound generated by the audio generator 240. The weight information may store a value for a weight to be applied in order to generate a warning sound corresponding to the location information.

The warning sound generator 240 may generate a warning sound of the vehicle 100 by using the information input through the input unit 210 under the control of the controller 220. The warning sound generator 240 may acquire frequency information according to the RPM of the vehicle 100 identified by the controller 220, and generate a warning sound by being divided according to the frequency band. In particular, when generating the warning sound may be generated by giving a weight to the vehicle according to the location information of the vehicle or by adjusting the output level of the warning sound.

The warning sound generating unit 240 checks information on the frequency band obtained from the control unit 220, separates the frequency into a sine wave and harmonics, and adds the period-by-period to at least one frequency of the separated sinusoids and harmonics. Value can be assigned.

The warning sound generator 240 may recombine the harmonics and the sine wave to which the addition value for each period is recombined, and adjust the level to a level corresponding to the position information.

In addition, the warning sound generating unit 240 may read out and output a warning sound corresponding to the location information of the vehicle when the pre-stored warning sound is present in the storage unit 230 downloaded from the outside or adjust the output to a predetermined level.

The AMP 250 may be an amplifier that is an amplifier. The sound source amplifier 250 may amplify the warning sound generated by the warning sound generator 240 based on the location information of the vehicle and output the amplified warning sound to the speaker 260.

Therefore, the warning sound generated to be output according to the pedestrian approach based on the driving situation and the location information of the vehicle may be output through the speaker 260.

According to the configuration as described above in the embodiment of the present invention can generate and output the warning sound of the vehicle, the operation for generating and output the warning sound will be described in detail with reference to FIGS.

3 is a flowchart illustrating an operation of generating a warning sound according to an embodiment of the present invention.

Referring to FIG. 3, the vehicle 100 may detect an approach of a pedestrian by sensing a sensor of the current sensing unit 190 in an engine driving mode S310 in which an engine is being driven, such as a moving or stationary state. S320)

The vehicle controller 170 may generate a warning sound generation request signal when a user request or a pedestrian's approach is detected, and may obtain current location information of the vehicle input to the location sensor 180 (S330).

The vehicle controller 170 outputs the obtained vehicle position information and the driving information of the vehicle 100 sensed by the sensing unit 190 to the alert sound generator 200 to generate an alert sound based on the position information of the vehicle. A detailed description of the warning sound generating operation will be given with reference to FIGS. 4 to 6.

The generated warning sound may be output to the inside or the outside of the vehicle through the speaker (S350).

4 is a flowchart illustrating an operation of generating a warning sound according to an embodiment of the present invention, FIG. 5 is an exemplary table showing an example of a modulation application value applied when generating a warning sound according to an embodiment of the present invention, and FIG. 6 is an embodiment of the present invention. It is an exemplary table showing an example of the warning sound level according to the vehicle position according to.

4 to 6, the control unit 220 of the warning sound generating unit 200 checks the driving speed of the current vehicle obtained from the input unit 210 (S501).

The controller 220 checks whether the current driving speed is less than or equal to the reference speed.

In the case of a low noise vehicle to which the present invention is applied, such as an electric vehicle, noise due to driving of a vehicle is less than a predetermined speed, and thus it is not easy for a pedestrian to recognize the approach of a vehicle. However, when the speed is higher than a predetermined speed, noise may occur due to the friction sound of the tire. Therefore, even without generating a separate warning sound, the pedestrian can easily recognize the approach of the vehicle by the noise generated according to the driving of the vehicle.

In addition, the embodiment of the present invention may detect the current position in addition to the driving speed of the vehicle, and may not generate a warning sound when the current vehicle is located on the highway. In the case of the highway, the vehicle is driven at a predetermined speed or more, and in the case of the highway, since there is no pedestrian, it may be controlled so as not to generate a separate warning sound.

The controller 220 may output a control signal for generating a warning sound to the audio generator 240 when the current driving speed of the vehicle is less than or equal to the reference speed.

The controller 220 determines whether there is a warning sound that can be output based on the driving speed or the location information of the vehicle in the storage 230.

The controller 220 reads out a corresponding warning sound when a pre-stored warning sound exists in the storage unit 230 (S504) when reading the pre-stored warning sound, confirming the location information of the vehicle input through the input unit 210. Then, check the warning sound level corresponding to the location information.

As shown in FIG. 5, the warning sound level stored in the storage unit 230 may have a level that conforms to a feature of a corresponding region based on the information where the vehicle is located. The level may be an audio output level such as an audio signal or an alarm level having a predetermined frequency band according to a feature of a corresponding region.

For example, the location of the vehicle detected by the location detection unit 180 is a variety of locations and zones, such as general roads, highways, alleys, child protection zones, senior care zones, one-way zones, accidents, wildlife zones, etc. Can be classified and stored as a characteristic.

Therefore, in the case of a child protection area or an elderly protection area, a warning sound of a level corresponding to the characteristics of pedestrians existing in the area may be generated and output. In the case of wildlife attention zones, the beep level can be adjusted to the frequency or db by referring to the animal's audible frequency band.

The controller 220 may adjust the warning sound output level to a predetermined level based on the location information with respect to the warning sound read from the storage 230 (S512) and output the adjusted warning sound through the speaker 260.

On the other hand, if there is no warning sound previously stored in the storage unit 220, the controller 220 may check whether the download is executed from the outside (S405).

The controller 220 may download a warning sound according to a user request through an external interface (not shown) (S406) and store the downloaded warning sound in the storage unit 230 (S407).

The stored warning sound may generate and output a warning sound according to a vehicle position, similar to an operation of reading and outputting the previously stored warning sound.

The controller 220 checks the position information and the driving information (speed, RPM) of the vehicle input through the input unit 210, and detects the peak frequency according to the mechanical noise generated by the piston movement of the internal combustion engine according to the engine driving. (S408)

The audio generator 240 may add the period-based addition value to the detected peak frequency based on the obtained vehicle position information and driving information (S409).

The period-specific addition value may be a predetermined value for generating audio such as an actual engine sound of the vehicle with reference to the speed and RPM according to the driving information of the vehicle. In particular, the warning sound according to an embodiment of the present invention may have an addition value of a specific frequency band based on location information according to a user's request, in addition to the addition value for generating the warning sound similar to the engine sound of the actual vehicle as described above.

The audio generator 240 determines whether the peak frequency to which the period-specific addition value is applied is less than or equal to a predetermined frequency band. In an embodiment of the present invention, it may be determined whether the frequency is 300 Hz or less. Cars with a 300 Hz frequency band are typically frequency bands with the engine sound characteristics of diesel cars. Therefore, according to an embodiment of the present invention, if a peak frequency of the frequency band or more is detected, a modulation value for generating audio (engine sound) similar to an actual vehicle may be applied.

The modulation value may be generated to highlight the impression of the audio according to the value applied as in the example table shown in FIG. 6.

The controller 220 may generate a warning sound based on driving information of the vehicle as described above (S412) and adjust the warning sound output level based on the generated location information of the vehicle received through the input unit 210. (S413)

As described above, the warning sound output level adjustment may be adjusted to a predetermined size or frequency band based on the location information of the vehicle as shown in the example table of FIG. 5.

The controller 220 may output the warning sound generated and adjusted by the audio generator 240 through the speaker 260.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments.

The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims (20)

In the beep generator,
An input unit configured to receive operation information and location information of the vehicle;
A storage unit including location information of the vehicle and warning sound generation information corresponding to the location information;
A controller for detecting a frequency according to mechanical noise of a vehicle based on the input operation information, checking band information of the detected frequency, and checking a warning sound level corresponding to the vehicle position information;
An audio generation unit for acquiring frequency information detected by the control unit, giving an interval value corresponding to the position information, and adjusting the frequency to which the addition value is applied to a predetermined level to generate a warning sound;
And an output unit for outputting the generated audio.
Beep device. The method of claim 1,
The storage unit
Storing cylinder number and engine type information of the vehicle, and storing an output level or frequency of a warning sound corresponding to the position information;
Beep generator. The method of claim 1,
The control unit
Classified into a high frequency band and a low frequency band according to the detected frequency band information,
The audio generator adds an addition value and a combustion sound value to frequencies classified into the high frequency band.
Beep generator. The method of claim 1,
The audio generator
The frequency obtained from the controller is classified into a sine wave and a harmonic, a period-specific addition value is given to at least one of the sine wave or the harmonic, and the sine wave and the harmonic are recombined.
Beep generator. The method of claim 1,
The control unit
Checking the input state information of the vehicle and controlling not to generate the warning sound when the vehicle is driven at a predetermined speed or more;
Beep device. The method of claim 1,
Confirming the location information of the input car and controlling not to execute engine sound generation when the car exists at a predetermined location including a highway;
Beep device. The method of claim 1,
The input unit
Receiving operation information including at least one RPM information, shift signal, speed information of the vehicle and location information received from the GPS
Beep device. The method of claim 1,
The storage unit
To store at least one beep from outside
Beep device. 9. The method of claim 8,
The control unit
At the time of generating the warning sound, the warning sound stored in the storage unit is read and adjusted to a predetermined level or frequency band corresponding to the checked position information.
Beep device. In automobiles,
Starting motor to start the engine;
An engine providing energy required for driving and driving of the vehicle and generating engine noise of a predetermined frequency;
A location sensor for obtaining location information of the vehicle;
A control unit for acquiring operation information of the vehicle and outputting operation information of the vehicle and position information of the vehicle to a warning sound generator;
A warning sound generating unit for acquiring operation information and location information of the vehicle from the control unit and generating a warning sound based on the obtained information;
car. 11. The method of claim 10,
The control unit
Checking the operation information and the location information of the vehicle, and stopping the output of the alarm sound generation request signal to the alarm sound generator when the vehicle is at a predetermined speed or at a predetermined position;
car. 11. The method of claim 10,
It further includes an interface unit for downloading a warning sound from the outside
car. Acquiring engine noise frequency and position information according to the driving state of the vehicle;
Generating a warning sound by providing a period-specific addition value corresponding to the position information to the obtained frequency and adjusting the predetermined frequency to a predetermined level;
And outputting the generated warning sound.
Beep device. 14. The method of claim 13,
Separating the obtained frequency into harmonics and sinusoids;
Applying a predetermined period-specific addition value according to the vehicle driving state to the separated sine wave;
Combining the sinusoid and the harmonic to which the addition is applied;
Adjusting a preset warning sound level according to the identified position information of the vehicle to the combined frequency;
Outputting the adjusted beep; further comprising
Beep device. 15. The method of claim 14,
Identifying the obtained frequency band;
Dividing a high frequency band and a low frequency band according to the identified frequency band;
The frequency classified into the high frequency band is applied to the interval-based addition value and adding a combustion sound;
Beep device. 16. The method of claim 15,
Adding the combustion sound
The audio characteristics of the vehicle are divided into predetermined levels, and the divided levels are adjusted and added.
Beep device. 14. The method of claim 13,
Checking a driving speed of the vehicle when acquiring an engine noise frequency according to the driving state of the vehicle;
When the driving speed of the vehicle is more than the reference speed characterized in that the alarm is not generated
Beep device. 18. The method of claim 17,
When the driving speed of the vehicle returns to the reference speed or less, the alarm sound generation is executed again.
Beep device. 14. The method of claim 13,
According to the obtained position information characterized in that the vehicle does not generate a warning sound when the highway or a predetermined position exists
Beep device. 20. The method of claim 19,
When the car deviates from the highway or the preset position, the alarm sound is generated again.
Beep device.
KR1020120094600A 2012-08-29 2012-08-29 Apparatus and method for generating of warning sound KR20140029613A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114523900A (en) * 2022-01-06 2022-05-24 浙江零跑科技股份有限公司 Control system and method integrating pedestrian warning tone and engine sound wave functions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114523900A (en) * 2022-01-06 2022-05-24 浙江零跑科技股份有限公司 Control system and method integrating pedestrian warning tone and engine sound wave functions

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