JP2013249033A - Proximity notification sound control device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a proximity notification sound control device for a vehicle capable of securing safety between a pedestrian and a vehicle, without hindering attention rousing and guiding of the pedestrian caused by proximity notification sound.SOLUTION: Surrounding sounds of surroundings outside vehicles are collected by a sound collection microphone 1, and form the surrounding sounds collected by the sound collection microphone 1, specific object sound is discriminated using a specific object sound discriminating means 41, wherein the specific object sound includes guiding sound output by a pedestrian signal of a pedestrian crossing, guiding sound output at an entrance of a public transportation facility, sound of a bell informing stop and start of a streetcar, alarming sound output when opening/closing the door of a fixed route bus, buzzer sound and vocal announcement for arousing attention to the surrounding when turning to the right or left or retreating of a large vehicle, or siren sound of an ambulance and a police vehicle. When the specific object sound is discriminated from the surrounding sounds, an proximity notification sound control part 5 suppresses and controls the output level of the proximity notification sound for informing the surroundings outside vehicles of the presence of the vehicle.

Description

  The present invention relates to a vehicle approach notification sound control device suitable for use in a vehicle having a low traveling sound such as an electric vehicle or a hybrid vehicle.

In recent years, an electric vehicle using an electric motor that uses electric energy charged in a battery instead of fossil fuel for the purpose of reducing CO ₂ , or an electric motor driven by a battery and a conventional engine as a power source. Hybrid vehicles are becoming popular. In such an electric vehicle or a hybrid vehicle, since the noise generated during running is small, an approach notification sound is generated in a pseudo manner to inform the pedestrian that the vehicle is approaching. We are trying to ensure safety in between.
As a vehicle approach notification sound control device that is applied to such an electric vehicle or a hybrid vehicle and generates an approach notification sound in a pseudo manner, a pseudo sound generation device for an electric vehicle that can adjust a pseudo sound volume generated according to ambient noise is adjustable. There is.
This pseudo sound generator for an electric vehicle includes a start sensor that detects the start of the electric vehicle, a rotation speed sensor that detects the rotation speed of the motor, and an accelerator opening sensor that detects the accelerator opening. Further, a pseudo sound selection means for selecting a pseudo sound mode based on start information, rotation speed information and accelerator opening information from these sensors is provided. Furthermore, a pseudo sound source means for generating a pseudo sound based on the output of the pseudo sound selection means and a volume switching means for switching the volume of the pseudo sound are provided. In addition, noise detection means for detecting ambient noise is provided, and the volume switching means is controlled based on noise information detected by the noise detection means. And the pseudo sound corresponding to the operation state of the electric vehicle is generated, and the pseudo sound volume is changed according to the ambient noise (see Patent Document 1).

Japanese Patent Laid-Open No. 7-182587

  Therefore, the conventional vehicle approach notification sound control device generates a pseudo sound according to the operation state of the host vehicle and changes the pseudo sound volume according to the ambient noise. When the ambient noise is large, the pseudo sound volume is increased. The safety between the pedestrian and the vehicle is ensured. For this reason, sounds detected as noise in the surroundings are pedestrian signals intended to alert pedestrians and guide pedestrians, guidance sounds at the entrances of transportation, announcements, or synthesized sounds of specific tones. In some cases, it becomes difficult for pedestrians to hear these guidance sounds, announcements, and synthesized sounds, which causes problems that hinder pedestrians' attention and guidance.

  The present invention has been made in view of such circumstances, and for vehicles that can ensure safety between a pedestrian and a vehicle without an approach notification sound being a hindrance to alerting or guiding the pedestrian. An object is to provide an approach notification sound control device.

  The invention according to claim 1 is a vehicle approach notification sound control device that controls an approach notification sound for notifying the vehicle exterior of the presence of the vehicle, and is a sound collecting device that collects ambient sounds around the vehicle exterior A specific target sound identifying means for identifying a specific target sound from the ambient sound collected by the sound collecting means, and when the specific target sound is identified from the peripheral sound by the specific target sound identifying means, An approach notification sound control means for suppressing and controlling the output of the approach notification sound is provided.

  The invention according to claim 2 is a vehicle approach notification sound control device that controls an approach notification sound for notifying the vehicle exterior of the presence of the vehicle, and is set in advance corresponding to the map data of the navigation device. Based on the specific target sound generation location specifying information for specifying the generation location of the specific target sound, the current position information of the vehicle acquired from the navigation device, and the specific target sound generation location specifying information, It is characterized by comprising an approach notification sound control means for suppressing and controlling the output level of the approach notification sound when the current position approaches the point indicated by the specific target sound generation location specifying information.

  According to the first aspect of the invention, when the specific target sound is identified by the specific target sound identifying means from the ambient sounds around the outside of the vehicle collected by the sound collecting means, the approach notification sound control means Since the output is suppressed and controlled, it is difficult to hear the specific target sound due to the approach notification sound, and the approach notification sound does not hinder pedestrian's attention and guidance. There is an effect that it is possible to provide a vehicle approach notification sound control device that can ensure safety between the vehicle and the vehicle.

  According to the second aspect of the present invention, based on the current position information of the vehicle acquired from the navigation device and the specific target sound generation location specification information, the current position of the vehicle is indicated by the specific target sound generation location specification information. Since it is configured to suppress and control the output level of the approach notification sound when approaching the point, the approach target sound makes it difficult to hear the specific target sound, and the approach notification sound hinders pedestrian's attention and guidance. Thus, there is an effect that it is possible to provide a vehicle approach notification sound control device that can ensure safety between the pedestrian and the vehicle.

  According to the third aspect of the invention, since the approach notification sound is controlled to be suppressed to the output level corresponding to the detected level of the specific target sound detected, the approach sound is controlled according to the detection level of the specific target sound. As a result of detailed control of the notification sound, the specific target sound is difficult to hear due to the approach notification sound, and the approach notification sound does not hinder pedestrians' attention and guidance. There is an effect that it is possible to provide a vehicle approach notification sound control device that can ensure safety with the vehicle.

  According to the fourth aspect of the present invention, when the pedestrian is not detected by the pedestrian detection means, the output of the approach notification sound is set to zero. Therefore, when the pedestrian is not detected around the vehicle, the approach notification is made. No sound is output, and when the pedestrian is not detected, the approach notification sound makes it difficult to hear the specific target sound, and the approach notification sound is not hindered. There exists an effect which can provide the approach notification sound control apparatus for vehicles which can ensure safety.

  According to the fifth aspect of the present invention, since the driver of the driver's seat can recognize the state of the suppression control of the approach notification sound, the approach notification sound does not hinder the pedestrian's attention and guidance. It becomes possible for the driver in the driver's seat to recognize the situation where the suppression control is performed, and it becomes difficult to hear the specific target sound due to the approach notification sound, and the approach notification sound hinders the pedestrian's attention and guidance. There is an effect that it is possible to provide a vehicle approach notification sound control device that can further ensure safety between the pedestrian and the vehicle.

  According to the sixth aspect of the present invention, the specific target sound reports the guidance sound output from the pedestrian traffic light on the pedestrian crossing, the guidance sound output from the entrance / exit of public transportation, the stop and departure of the tram. A bell sound, a warning sound that is output when the door of a route bus is opened and closed, a buzzer sound to call attention to the surroundings when turning or reversing a large vehicle, an audio announcement, or an emergency vehicle, police vehicle Because it is configured to include siren sounds, specific target sounds including these guidance sounds, bell sounds, warning sounds, buzzer sounds and voice announcements, or siren sounds are identified by the specific target sound identification means from the surrounding sounds outside the vehicle. Then, as a result of the output of the approach notification sound being suppressed by the approach notification sound control means, it becomes difficult to hear the specific target sound by the approach notification sound, and the approach notification sound is used to alert the pedestrian. And induced no longer can interfere, there is safety can provide access notification sound control apparatus for a vehicle capable of securing effect between the pedestrian and the vehicle.

It is a block diagram which shows the structure of the approach notification sound control apparatus for vehicles which is the 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the approach notification sound control apparatus for vehicles which is the 1st Embodiment of this invention. It is explanatory drawing which shows an example of the relationship between the corrected amount of the approach notification sound control apparatus for vehicles which is the 1st Embodiment of this invention, and the detection level of a specific target sound. It is explanatory drawing which shows the relationship between the output sound pressure level of the corrected approach notification sound of the vehicle approach notification sound control apparatus which is the 1st Embodiment of this invention, and the detection level of a specific target sound. It is a block diagram which shows the structure of the approach notification sound control apparatus for vehicles which is the 2nd Embodiment of this invention. It is a flowchart which shows operation | movement of the approach notification sound control apparatus for vehicles which is the 2nd Embodiment of this invention. It is a block diagram which shows the structure of the approach notification sound control apparatus for vehicles which is the 3rd Embodiment of this invention. It is a flowchart which shows operation | movement of the approach notification sound control apparatus for vehicles which is the 3rd Embodiment of this invention.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described. FIG. 1 is a block diagram showing a configuration of a vehicle approach notification sound control apparatus according to the first embodiment of the present invention. This vehicle approach notification sound control device is mounted on an electric vehicle or a hybrid vehicle. This embodiment is mounted on an electric vehicle and includes a sound collection microphone 1, a specific target sound detection unit 4, an approach notification sound control unit 5, a driver notification device 6, and an approach notification sound output speaker 7.
The sound collection microphone 1 collects sound around the own vehicle that is an electric vehicle, converts the sound into an electric signal, and outputs the electric signal.
The vehicle speed information 2 is the vehicle speed of the host vehicle detected by a vehicle speed sensor (not shown).

The specific target sound detection unit 4 identifies and detects the specific target sound from the sounds around the host vehicle collected by the sound collecting microphone 1. Further, the sound pressure level of the detected specific target sound is detected.
Specific target sounds include guidance sounds output by pedestrian traffic lights on pedestrian crossings, guidance sounds output at the entrances and exits of public transportation, bell sounds that notify the stop and departure of trams, and the doors of route buses are opened and closed. Warning sound that is output at the time of turning, a buzzer sound and voice announcement for calling attention to the vicinity of a large vehicle when turning left or right, or a siren sound of an emergency vehicle or police vehicle.
The specific target sound detection unit 4 identifies the specific target sound from among the sound signals of the sounds around the host vehicle collected by the sound collecting microphone 1, such as the guidance sound, the bell sound, the warning sound, the buzzer sound, the announcement, and the siren sound. Identification means 41 is provided.

  The specific target sound identification means 41 can use, for example, a sound source type identification method based on a pulse neural network model. The specific target sound detection unit 4 outputs specific target sound detection information indicating whether or not the specific target sound is detected, the identified specific target sound information, and the sound pressure level information of the detected specific target sound.

  The approach notification sound control unit 5 approaches based on the specific target sound detection information output from the specific target sound detection unit 4, the specific target sound information, the sound pressure level information of the specific target sound, and the vehicle speed information 2 of the host vehicle. Control the notification sound. The approach notification sound control unit 5 is realized by the function of the vehicle ECU.

The driver notification device 6 notifies the driver of the control status of the approach notification sound. As means for notifying the driver at this time, the control state of the approach notification sound is visually displayed and output in a predetermined display pattern on the liquid crystal monitor screen of the driver's seat. Alternatively, the control status of the approach notification sound is output by voice announcement.
The approach notification sound output speaker 7 outputs an approach notification sound.

FIG. 2 is a flowchart showing the operation of the vehicle approach notification sound control apparatus according to this embodiment. The operation will be described below according to this flowchart.
The operation of the vehicle approach notification sound control device will be described as an approach notification sound control operation by the vehicle ECU constituting the approach notification sound control unit 5. The program indicating the approach notification sound control shown in the flowchart of FIG. 2 is stored in the ROM of the vehicle ECU constituting the approach notification sound control unit 5 as a subroutine program.
When the CPU of the vehicle ECU executes this subroutine program, it is first determined in step S1 whether or not the vehicle speed of the host vehicle is a vehicle speed that outputs an approach notification sound. That is, it is determined from the vehicle speed information of the vehicle information 2 whether or not the host vehicle is stopped and whether or not the vehicle speed is 0 km / h. If the vehicle speed is not 0 km / h, the vehicle speed is determined to output an approach notification sound.
In addition, if the vehicle speed at which the approach notification sound is unnecessary (for example, 30 km / h or more), the vehicle speed is determined to output the approach notification sound. The reason why the vehicle speed of 30 km / h or more is regarded as a vehicle speed that does not require an approach notification sound is that there is no need to output an approach notification sound to a pedestrian because a running sound is generated by a tire when the vehicle speed exceeds 30 km / h. Another reason is that the quietness in the passenger compartment can be improved by turning off the unnecessary approach notification sound.
Since it is not necessary to output an approach notification sound when the host vehicle is stopped or the vehicle speed is 30 km / h or higher, the subroutine program is skipped after the approach notification sound output is turned off in step S7.

If it is determined in step S1 that the vehicle speed at which an approach notification sound is output, an approach notification sound having a predetermined output sound pressure level is output from the approach notification sound output speaker 7 (step S2). Subsequently, whether specific target sounds such as a guide sound, a bell sound, a warning sound, a buzzer sound, a voice announcement, and a siren sound are detected by the specific target sound detection unit 4 in the ambient sounds collected by the sound collecting microphone 1. It is determined whether or not (step S3).
As the ambient sound collected by the sound collection microphone 1, various types of sounds are collected according to the environment in which the host vehicle is traveling. If you are driving in the city, other vehicle horns, driving sounds of other vehicles, pedestrian speech, voice announcements for pedestrian crossings, including voice announcements for pedestrian guidance at intersections, public sounds Guidance sound that is output at the entrance of transportation, siren sound of emergency vehicle, bell sound that notifies stop and departure of tram, warning sound that is output when the door of the route bus is opened and closed, dump truck turn right or left Sound announcements such as voice announcements and buzzer sounds for alerting pedestrians are collected.

  The ambient sound collected by the sound collection microphone 1 is converted into an electrical signal and output to the specific target sound detection unit 4. The specific target sound identification unit 41 of the specific target sound detection unit 4 uses the guidance sound or bell from the peripheral sound. Identify specific target sounds such as sounds, warning sounds, buzzer sounds, voice announcements, and siren sounds. When the specific target sound is identified from the surrounding sounds by the specific target sound identification unit 41, the specific target sound detection unit 4 further detects the detection level and the input sound pressure level of the specific target sound.

  In a succeeding step S4, it is determined whether or not the specific target sound included in the surrounding sound collected by the sound collecting microphone 1 is detected. If the specific target sound is detected, the output sound pressure level of the approach notification sound is controlled according to the detected level of the detected specific target sound and the input sound pressure level (step S5). For example, when the specific target sound is detected, the output sound pressure level of the approach notification sound is output in step S2 with a correction amount corresponding to the detected detection level of the specific target sound and the input sound pressure level. Correction is performed for the fixed output sound pressure level of the approach notification sound that has been made, and control is performed so as to decrease the output sound pressure level of the approach notification sound from the constant output sound pressure level. The correction amount at this time is defined in advance according to the input sound pressure level, and the detection level of the specific target sound and the correction amount are set in an inversely proportional relationship. That is, the correction amount decreases as the detection level of the specific target sound increases.

FIG. 3 is an explanatory diagram showing an example of the relationship between the correction amount and the detection level of the specific target sound.
As a result, the output sound pressure level of the approach notification sound is controlled with respect to the detection level when the specific target sound is detected and the input sound pressure level to such an extent that the pedestrian cannot hear the specific target sound. The

FIG. 4 is an explanatory diagram showing the relationship between the output sound pressure level of the approach notification sound corrected by the correction amount shown in FIG. 3 and the detection level of the specific target sound.
As shown in FIG. 4, when the detection level of the specific target sound is low, an approach notification sound whose output is started in step S2 with a large correction amount so as not to hinder the pedestrian from hearing the specific target sound. Is corrected so that the output sound pressure level of the approach notification sound is sufficiently small. In addition, when the detection level of the specific target sound is high, a constant output sound of the approach notification sound that is output in step S2 with a correction amount that is small enough not to hinder the pedestrian from hearing the specific target sound. The pressure level is corrected, and the output sound pressure level of the approach notification sound is controlled to be decreased from the constant output sound pressure level by the smaller correction amount.

  Note that the control of the output sound pressure level of the approach notification sound in step S5 is performed when the specific target sound is detected, with a certain amount of approach notification sound that does not hinder a pedestrian from hearing the specific target sound. The output sound pressure level may be reduced or controlled to zero.

  Subsequently, the control state of the approach notification sound is visually displayed and output from the driver notification device 6 on the liquid crystal monitor screen of the driver's seat, or is output by voice announcement to notify the driver (step S6).

As described above, according to this embodiment, specific objects such as a guide sound, a bell sound, a warning sound, a buzzer sound, a voice announcement, and a siren sound are added to the ambient sound collected around the traveling vehicle. When a sound is detected, the output sound pressure level of the approach notification sound that has been output so far can be reduced to such an extent that it does not hinder pedestrians and persons with disabilities from hearing the specific target sound.
Therefore, it is possible to reliably avoid the situation where it is difficult for the pedestrian or handicapped person to hear the specific target sound due to the approach notification sound, and to prevent the specific target sound for alerting or guiding the pedestrian or the handicapped person. Thus, there is an effect that it is possible to provide a vehicle approach notification sound control device that can ensure safety between the pedestrian and the vehicle.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.
FIG. 5 is a block diagram showing the configuration of the vehicle approach notification sound control apparatus according to this embodiment. In FIG. 5, the same or corresponding parts as in FIG.
The vehicle approach notification sound control device of this embodiment includes a pedestrian detection unit 3 in addition to the configuration of the vehicle approach notification sound control device described in the first embodiment.
The pedestrian detection unit 3 detects pedestrians around the host vehicle. This detection of pedestrians around the vehicle can detect pedestrians based on the difference in reflectance between the pedestrian and the pedestrian when the millimeter wave is irradiated by an image processing method or a millimeter wave radar device, for example. . The pedestrian detection part 3 outputs the detection result of the pedestrian around the own vehicle.
The approach notification sound control unit 15 includes the specific target sound detection information output from the specific target sound detection unit 4, the specific target sound information, the sound pressure level information of the specific target sound, and the pedestrian output from the pedestrian detection unit 3. The approach notification sound is controlled based on the detection result and the vehicle speed of the vehicle information 2 of the host vehicle.

FIG. 6 is a flowchart showing the operation of the vehicle approach notification sound control device of this embodiment. In FIG. 6, the same or corresponding processing steps as those in FIG.
The operation of the vehicle approach notification sound control apparatus will be described as an approach notification sound control operation by the vehicle ECU constituting the approach notification sound control unit 15. The program indicating the approach notification sound control shown in the flowchart of FIG. 6 is stored in the ROM of the vehicle ECU constituting the approach notification sound control unit 15 as a subroutine program.

In the vehicle approach notification sound control device of this embodiment, following step S1, it is determined whether or not a pedestrian has been detected around the host vehicle by the pedestrian detection unit 3 (step S11). If a pedestrian is detected around the host vehicle by the pedestrian detection unit 3, the process proceeds to step S2, and an approach notification sound having a predetermined output sound pressure level is output from the approach notification sound output speaker 7. To do. Then, the specific target sound detection unit 4 detects specific target sounds such as a guide sound, a bell sound, a warning sound, a buzzer sound, a voice announcement, and a siren sound among the surrounding sounds collected by the sound collecting microphone 1. It is determined whether or not (step S3). When the specific target sound is detected, the output sound pressure level of the approach notification sound is controlled according to the detection level of the detected specific target sound and the input sound pressure level (step S5).
When no pedestrian is detected in the vicinity of the host vehicle in step S11, it is not necessary to output an approach notification sound. Therefore, the subroutine program is skipped after an approach notification sound output off operation is performed in step S7.
It should be noted that quietness in the passenger compartment can be improved by setting the unnecessary notification sound to zero when there is no pedestrian by turning off the approach notification sound output.

  As described above, according to this embodiment, pedestrians are detected around the traveling vehicle, and the collected ambient sounds are guided sounds, bell sounds, warning sounds, buzzer sounds and voice announcements, When a specific target sound such as a siren sound is detected, the output sound pressure level of the approach notification sound that has been output until then is reduced to such an extent that it does not interfere with pedestrians and persons with disabilities. Can be made. Therefore, it is possible to reliably avoid the situation where it is difficult for the pedestrian or handicapped person to hear the specific target sound due to the approach notification sound, and to prevent the specific target sound for alerting or guiding the pedestrian or the handicapped person. Thus, there is an effect that it is possible to provide a vehicle approach notification sound control device that can ensure safety between the pedestrian and the vehicle.

(Third embodiment)
Next, a third embodiment of the present invention will be described.
FIG. 7 is a block diagram showing the configuration of the vehicle approach notification sound control apparatus of this embodiment.
In FIG. 7, the same or corresponding parts as in FIG.
The vehicle approach notification sound control device according to this embodiment includes the current position information 11 of the own vehicle acquired from the GPS of the navigation device and the specific target sound generation location specifying information set in advance corresponding to the map data of the navigation device. 12 is used.

  The specific target sound generation location specifying information 12 is point information on map data for specifying a location where a specific target sound such as a guidance sound or a voice announcement is generated. For example, in the case of pedestrian crossings and public transport entrances and exits for pedestrians and users, voice announcements, crosswalks with such guidance sounds and voice announcement output means, and public transport entrances and exits Since it has been clarified in advance, it is previously stored in a database as point information for specifying points on the map data where the pedestrian crossing and the entrance / exit of public transportation are located.

The pedestrian detection unit 3 detects pedestrians around the host vehicle. This detection of pedestrians around the vehicle can detect pedestrians based on the difference in reflectance between the pedestrian and the pedestrian when the millimeter wave is irradiated by an image processing method or a millimeter wave radar device, for example. . The pedestrian detection part 3 outputs the detection result of the pedestrian around the own vehicle.
The approach notification sound control unit 25 determines the current position of the own vehicle based on the current position information 11 of the own vehicle acquired from the GPS of the navigation device and the specific target sound generation location specifying information 12 and specifies the specific target sound generation location specifying information. When the point indicated by 12 approaches within a certain distance, for example, within 20 meters, control is performed to suppress the output level of the approach notification sound that has been output so far.

FIG. 8 is a flowchart showing the operation of the vehicle approach notification sound control apparatus according to this embodiment. In FIG. 8, the same or equivalent processing steps as those in FIG.
The operation of the vehicle approach notification sound control device will be described as an approach notification sound control operation by the vehicle ECU constituting the approach notification sound control unit 25. The program indicating the approach notification sound control shown in the flowchart of FIG. 8 is stored in the ROM of the vehicle ECU constituting the approach notification sound control unit 25 as a subroutine program.
In the vehicle approach notification sound control device of this embodiment, the host vehicle travels at a vehicle speed that generates an approach notification sound, and an approach notification sound having a certain output sound pressure level is output from the approach notification sound output speaker 7. If so, the current vehicle position information 11 of the host vehicle is taken in from the GPS of the navigation device (step S21). Then, the specific target sound generation location specifying information 12 is searched based on the current position information at the time of capturing, and the specific target sound generation location included within a radius of, for example, 20 meters from the current position of the host vehicle. It is determined whether or not it exists (step S22).
As a result, when it is determined that the specific target sound generation location exists, the output sound pressure level of the approach notification sound is reduced by a certain amount or zero so that the pedestrian cannot hear the specific target sound. (Step S5).

Following step S1, it is determined whether or not a pedestrian is detected around the own vehicle by the pedestrian detection unit 3, and if a pedestrian is detected around the own vehicle by the pedestrian detection unit 3, the process goes to step S2. The approach notification sound having a predetermined output sound pressure level that is determined in advance may be output from the approach notification sound output speaker 7. Further, since it is not necessary to output an approach notification sound when no pedestrians are detected around the host vehicle, the subroutine program is configured to bypass the approach notification sound output off operation in step S7. Also good.
It should be noted that quietness in the passenger compartment can be improved by setting the unnecessary notification sound to zero when there is no pedestrian by turning off the approach notification sound output.

  As described above, according to this embodiment as described above, the current position of the traveling vehicle is a guide sound, a pedestrian crossing provided with a voice announcement output means, a fixed distance range with respect to the entrance and exit of public transportation When approaching inside, the output sound pressure level of the approach notification sound that has been output so far can be reduced to such an extent that it does not hinder pedestrians and persons with disabilities from hearing the specific target sound. Therefore, it is possible to reliably avoid the situation where it is difficult for the pedestrian or handicapped person to hear the specific target sound due to the approach notification sound, and to prevent the specific target sound for alerting or guiding the pedestrian or the handicapped person. Thus, there is an effect that it is possible to provide a vehicle approach notification sound control device that can ensure safety between the pedestrian and the vehicle.

  DESCRIPTION OF SYMBOLS 1 ... Sound collection microphone (sound collection means), 3 ... Pedestrian detection part (pedestrian detection means), 4 ... Specific target sound detection part (specific target sound level detection means), 5, 15 ... Notification of approach Sound control unit (approach notification sound control means), 41... Specific target sound identification means, 6... Driver notification device (notification means), 7.

Claims (6)

A vehicle approach notification sound control device for controlling an approach notification sound for notifying the vehicle exterior of the presence of a vehicle,
Sound collecting means for collecting ambient sounds around the outside of the vehicle;
Specific target sound identifying means for identifying a specific target sound from ambient sounds collected by the sound collecting means;
When the specific target sound is identified from the ambient sound by the specific target sound identifying means, an approach notification sound control means for suppressing and controlling the output of the approach notification sound;
A vehicle approach notification sound control device comprising: A vehicle approach notification sound control device for controlling an approach notification sound for notifying the vehicle exterior of the presence of a vehicle,
Specific target sound generation location specifying information for specifying the generation location of the specific target sound set in advance corresponding to the map data of the navigation device;
Based on the current position information of the vehicle acquired from the navigation device and the specific target sound generation location specification information, an approach notification when the current position of the vehicle approaches the point indicated by the specific target sound generation location specification information An approach notification sound control means for suppressing and controlling the output level of the sound;
A vehicle approach notification sound control device comprising: Specific target sound level detection means for detecting the level of the specific target sound identified by the specific target sound identification means,
The said approach notification sound control means suppresses and controls the said approach notification sound to the output level according to the detection level of the said specific target sound detected by the said specific target sound level detection means. A vehicle approach notification sound control device. Pedestrian detection means for detecting pedestrians around the vehicle,
In the suppression control by the approach notification sound control means, when the pedestrian detection means does not detect the pedestrian, the output of the approach notification sound is set to zero.
The vehicle approach notification sound control device according to any one of claims 1 to 3, wherein the vehicle approach notification sound control device is provided.   5. The vehicle according to claim 1, further comprising a notification unit that outputs a state of suppression control of the approach notification sound by the approach notification sound control unit so that a driver of a driver's seat can recognize the vehicle. Approach notification sound control device.   The specific target sound includes a guidance sound output from a pedestrian traffic light on a pedestrian crossing, a guidance sound output from an entrance / exit of public transportation, a bell sound that notifies a stop and departure of a tram, and a door of a route bus opens and closes Including at least one of the warning sound that is output when the vehicle is turned on, the buzzer sound to call attention to the surroundings when turning left or right of a large vehicle, the voice announcement, or the siren sound of an emergency vehicle or police vehicle The vehicle approach notification sound control device according to any one of claims 1 to 5.

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