WO2021246014A1 - Véhicule - Google Patents

Véhicule Download PDF

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Publication number
WO2021246014A1
WO2021246014A1 PCT/JP2021/009094 JP2021009094W WO2021246014A1 WO 2021246014 A1 WO2021246014 A1 WO 2021246014A1 JP 2021009094 W JP2021009094 W JP 2021009094W WO 2021246014 A1 WO2021246014 A1 WO 2021246014A1
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WO
WIPO (PCT)
Prior art keywords
vehicle
sound
microphone
unit
speaker
Prior art date
Application number
PCT/JP2021/009094
Other languages
English (en)
Japanese (ja)
Inventor
晃平 野口
理基 伊東
Original Assignee
本田技研工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Publication of WO2021246014A1 publication Critical patent/WO2021246014A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones

Definitions

  • the present invention relates to a vehicle.
  • Patent Document 1 Conventionally, a technique for adjusting the audibility of sounds around a vehicle is known (see, for example, Patent Document 1).
  • noise around the vehicle is collected by a microphone, and a sound having a phase opposite to the noise is generated from a speaker in the helmet, so that the noise cannot be heard.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle capable of easily hearing environmental sounds even when wearing a helmet.
  • the vehicle is a vehicle equipped with a speaker array composed of a plurality of speakers, and the localization of the virtual sound source can be changed by the speaker array.
  • the vehicle is a microphone that collects sounds around the vehicle.
  • the speaker array is characterized in that the sound information collected by the microphone is localized and reproduced in the direction in which the sound is generated.
  • the speaker array may generate a virtual sound source in a specific direction or increase the volume of the virtual sound source only under predetermined conditions under which the occupant should pay attention to the sound around the vehicle. good.
  • the predetermined condition is when it is detected that another vehicle is approaching, and the specific direction may be a direction in which the other vehicle exists.
  • the detection that the other vehicle is approaching may be performed when the sound pressure in a specific frequency band of the sound information collected by the microphone increases within a predetermined time.
  • the detection that the other vehicle is approaching may be performed when the sound pressure in a specific frequency band of the sound information collected by the microphone exceeds a predetermined threshold value.
  • the predetermined condition is when the operation of the vehicle is detected, and the specific direction may be a direction related to the operation.
  • the operation is a turn signal operation
  • the specific direction may be the right side or the left side of the vehicle.
  • the operation is a brake operation, and the specific direction may be behind the vehicle.
  • the operation is a throttle operation, and the specific direction may be in front of the vehicle.
  • the vehicle is a vehicle equipped with a speaker array composed of a plurality of speakers, and the localization of a virtual sound source can be changed by the speaker array.
  • the vehicle is a microphone that collects sounds around the vehicle.
  • the speaker array is provided with, and the speaker array localizes and reproduces the sound information collected by the microphone in the direction in which the sound is generated. According to this configuration, the ambient sound can be easily heard even when the helmet is worn by reproducing the surrounding sound from the generation direction by the virtual sound source.
  • the speaker array may generate a virtual sound source in a specific direction or increase the volume of the virtual sound source only under predetermined conditions under which the occupant should pay attention to the sound around the vehicle. good. According to this configuration, energy can be saved as compared with the case where a virtual sound source is constantly generated or the volume of the virtual sound source is increased.
  • the predetermined condition is when it is detected that another vehicle is approaching, and the specific direction may be a direction in which the other vehicle exists. According to this configuration, it is possible to easily recognize from which direction other vehicles are approaching.
  • the detection that the other vehicle is approaching may be performed when the sound pressure in a specific frequency band of the sound information collected by the microphone increases within a predetermined time. According to this configuration, it is possible to detect that another vehicle is approaching without using a detection means other than a microphone.
  • the detection that the other vehicle is approaching may be performed when the sound pressure in a specific frequency band of the sound information collected by the microphone exceeds a predetermined threshold value. According to this configuration, it is possible to detect that another vehicle is approaching without using a detection means other than a microphone.
  • the predetermined condition is when the operation of the vehicle is detected, and the specific direction may be a direction related to the operation. According to this configuration, it is possible to easily hear the sound in the direction in which the vehicle moves by operation.
  • the operation is a turn signal operation
  • the specific direction may be the right side or the left side of the vehicle. According to this configuration, when the turn signal operation is detected, it is possible to easily hear the right or left sound in the direction in which the vehicle is expected to move due to the turn signal operation.
  • the operation is a brake operation, and the specific direction may be behind the vehicle. According to this configuration, when the brake operation is detected, it is possible to easily hear the rear sound that is assumed that the vehicle moves relatively due to the brake operation.
  • the operation is a throttle operation, and the specific direction may be in front of the vehicle. According to this configuration, when the throttle operation is detected, it is possible to easily hear the sound in front of the vehicle, which is assumed to move due to the throttle operation.
  • FIG. 1 is a left side view of a motorcycle according to an embodiment of the present invention.
  • FIG. 2 is a plan view of the motorcycle as viewed from above.
  • FIG. 3 is a view of the front part of the motorcycle as viewed from the rear side.
  • FIG. 4 is a block configuration diagram showing the configuration of the control device.
  • FIG. 5 is a diagram showing a configuration of a sound output system of a motorcycle.
  • FIG. 6 is a schematic diagram of a motorcycle traveling on a road.
  • FIG. 7 is a diagram showing a frequency spectrum of ambient sound of a motorcycle.
  • FIG. 8 is a diagram showing a frequency spectrum of ambient sound determined by sound image localization processing at the time of approach.
  • FIG. 9 is a flowchart showing the operation of the control unit.
  • FIG. 1 is a left side view of the motorcycle 1 according to the embodiment of the present invention.
  • FIG. 2 is a plan view of the motorcycle 1 as viewed from above.
  • FIG. 3 is a view of the front part of the motorcycle 1 as viewed from the rear side.
  • the engine 11 as a power unit is supported by the vehicle body frame 10
  • the steering system 12 that supports the front wheels 2 so as to be steerable is supported by the front end portion of the vehicle body frame 10 so as to be steerable to the left and right, and supports the rear wheels 3.
  • the swing arm 13 is a vehicle provided at the rear of the vehicle body frame 10.
  • the rear wheel 3 is a drive wheel driven by the engine 11.
  • the motorcycle 1 is a saddle-riding vehicle in which an occupant sits so as to straddle the seat 14, and the seat 14 is provided above the rear portion of the vehicle body frame 10.
  • the power unit may be an electric motor.
  • the seat 14 is supported from below by the vehicle body frame 10 and is arranged between the front wheels 2 and the rear wheels 3 in the front-rear direction of the vehicle.
  • the seat 14 is arranged above the rear of the engine 11.
  • the front wheel 2 is supported by the lower end portion of the steering system 12.
  • a steering wheel 20 is provided at the upper end of the steering system 12.
  • the handle 20 is arranged in front of and above the seat 14.
  • the handle 20 is supported by the vehicle body front portion 10a located in front of the seat 14 in the vehicle body, and is steered to the left and right with respect to the vehicle body front portion 10a.
  • the handle 20 rotates about the steering shaft 20a arranged on the front portion 10a of the vehicle body as a rotation center.
  • the steering shaft 20a is located at the center of the width of the motorcycle 1 like the front wheels 2.
  • the steering shaft 20a is a part of the steering system 12, and is tilted backward with respect to the vertical direction when viewed from the side of the vehicle.
  • the steering wheel 20 has a rod-shaped handle portion 20b extending to the left and right outside with respect to the steering shaft 20a at the center of the vehicle width, and a pair of left and right grip portions 20c provided at the outer ends of the handle portion 20b in the vehicle width direction. Be prepared. The occupant seated on the seat 14 grips the left and right grip portions 20c with his left and right hands, respectively, and steers the handle 20.
  • the motorcycle 1 includes a vehicle body cover 22 that covers a vehicle body such as a vehicle body frame 10.
  • the front portion of the vehicle body cover 22 covers the front cover 23 that covers the upper portion of the steering system 12 and the front end portion of the vehicle body frame 10 from the front and sides, and the vehicle body between the handle 20 and the seat 14 from above and from the sides.
  • a center cover 24 is provided.
  • the vehicle body front portion 10a is composed of a vehicle body frame 10, a vehicle body cover 22, and the like.
  • the motorcycle 1 is provided with a windscreen 25 extending upward with respect to the front cover 23 in front of the handle 20.
  • the motorcycle 1 includes a pair of left and right rearview mirrors 26 extending outward in the vehicle width direction from the left and right side portions of the front cover 23.
  • the left and right rear-view mirrors 26 are arranged outside the windscreen 25 in the vehicle width direction.
  • the rearview mirror 26 is located near the lower end of the windscreen 25.
  • the motorcycle 1 includes a front fender 28 that covers the front wheel 2 from above.
  • the front fender 28 is supported by the lower part of the steering system 12.
  • the motorcycle 1 is provided with a headlight 29a and a pair of left and right turn signals 29b as lighting equipment.
  • the headlight 29a is provided at the front end portion of the front cover 23, and the blinker 29b is provided at the front surface of the left and right rear-view mirrors 26, respectively.
  • the motorcycle 1 is provided with a display unit 30 for displaying the state of the motorcycle 1 behind the windscreen 25.
  • the display unit 30 is arranged in front of and above the handle 20.
  • the display unit 30 is a meter unit that displays information about the motorcycle 1 such as the vehicle speed of the motorcycle 1.
  • the display unit 30 includes instruments 31 and 32 for displaying information (vehicle speed, engine speed, etc.) related to the motorcycle 1, and a monitor 33 for displaying various information.
  • the monitor 33 is provided with a known display panel such as a liquid crystal panel, and displays various information including information about the motorcycle 1 toward the occupant side on the rear upper side.
  • the motorcycle 1 has a pair of steering wheel side operation units 36 provided on the left and right handlebars 20b as operation units 35 for the occupant to operate each part of the motorcycle 1, and the center of the vehicle width behind the display unit 30. It is provided with a central operation unit 37 arranged in.
  • the operation unit 35 is arranged in front of the seat 14.
  • the motorcycle 1 includes a plate-shaped operation portion support portion 38 extending forward from the front end portion 24a of the central portion in the vehicle width direction of the center cover 24.
  • the operation unit support portion 38 extends forward from the center cover 24 through above the handle 20 and is connected to the rear end portion of the display unit 30.
  • the operation unit support portion 38 is located above the central portion of the steering wheel 20 in the vehicle width direction and covers the steering shaft 20a from above.
  • the operation unit support unit 38 constitutes a part of the vehicle body cover 22.
  • the central operation unit 37 is provided on the operation unit support unit 38 and is located between the center cover 24 and the display unit 30.
  • the central operation unit 37 includes a pressing operation unit 37a composed of a plurality of operation buttons and a stick-shaped operator 37b protruding upward from the operation unit support unit 38.
  • the operator 37b is arranged in front of the pressing operation unit 37a and projects upward from the pressing operation unit 37a.
  • the operator 37b is located at the center of the vehicle width. According to the operator 37b, each part of the motorcycle 1 can be operated by the tilting operation of tilting the operator 37b in an arbitrary direction and the rotation operation of rotating the operator 37b around the axis of the operator 37b. ..
  • the motorcycle 1 is provided with a microphone 50 for collecting sound on the upper part of the rear-view mirror 26.
  • the microphone 50 includes a first microphone 51 and a second microphone 52.
  • the first microphone 51 is arranged on the upper surface of the rear-view mirror 26 on the left side.
  • the second microphone 52 is arranged on the upper surface of the rear-view mirror 26 on the right side.
  • the microphone 50 collects ambient environmental sounds by a stereophonic method by the first microphone 51 and the second microphone 52.
  • the motorcycle 1 is provided with instruments 31 and 32 of the display unit 30 and a speaker array 60 above the monitor 33.
  • the speaker array 60 By arranging the speaker array 60 above the instruments 31 and 32 of the display unit 30 and the monitor 33, the speaker array 60 can be arranged closer to the driver's ear and the attenuation of sound due to the steering wheel or the like can be reduced. ..
  • the speaker array 60 is a speaker unit equipped with a plurality of speakers arranged in the width direction (left-right direction) of the motorcycle 1 and expanding the area in which the driver (occupant) and the like can hear in the width direction.
  • the first speaker 61, the second speaker 62, the third speaker 63, the fourth speaker 64, the fifth speaker 65, the sixth speaker 66, the seventh speaker 67, and the eighth speaker 68 are configured from the left when viewed from the driver. Is arranged in a row.
  • the sound output from any of the first speaker 61 to the eighth speaker 68 can be heard by the driver or the passenger. It can be delivered to the ears of others.
  • the case where the number of speakers included in the speaker array 60 is eight will be described, but the number of speakers is arbitrary and can be changed as appropriate.
  • FIG. 4 is a block configuration diagram showing the configuration of the control device 100.
  • the configuration of the control device 100 will be described with reference to FIG.
  • the control device 100 includes a vehicle information input unit 101, a DSP 102, and a control unit 110.
  • DSP is a notation that abbreviates Digital Signal Processor.
  • the vehicle information input unit 101 functions as a connection interface with the motorcycle (hereinafter, also referred to as "own vehicle") 1, and vehicle information is input from the own vehicle 1.
  • the vehicle information includes the sensor data of the vehicle speed detection unit 71, the sensor data of the throttle detection unit 72, the sensor data of the turn signal switch detection unit 73, and the sensor data of the brake switch detection unit 74.
  • the vehicle speed detection unit 71 is a sensor that detects the vehicle speed of the own vehicle 1.
  • the vehicle speed detection unit 71 detects the vehicle speed of the own vehicle 1 and outputs sensor data indicating the vehicle speed of the own vehicle 1 to the control device 100.
  • the throttle detection unit 72 is a sensor that detects the throttle operation.
  • the throttle detection unit 72 outputs sensor data indicating throttle operation to the control device 100.
  • the turn signal switch detection unit 73 is a sensor that detects the operation of the turn signal switch of the operation unit 35.
  • the turn signal switch detection unit 73 outputs sensor data indicating a left direction instruction operation and a right direction instruction operation by the operation of the turn signal switch of the operation unit 35 to the control device 100.
  • the brake switch detection unit 74 is a sensor that detects the brake operation.
  • the brake switch detection unit 74 outputs sensor data indicating the brake operation to the control device 100.
  • the sound input unit 140 and the sound output unit 150 are connected to the DSP 102.
  • the sound input unit 140 includes a microphone 50, converts the collected ambient sound into an analog sound signal, and outputs the sound to the DSP 102.
  • the DSP 102 converts the sound signal input from the sound input unit 140 into a digital signal and outputs it to the control unit 110.
  • the sound input unit 140 uses a microphone 50 mounted on the own vehicle 1 to collect sounds around the own vehicle 1 by a stereophonic method.
  • the DSP 102 generates a sound signal based on the sound information processed by the control unit 110.
  • the generated sound signal is an analog signal, and a plurality of channels are generated.
  • the DSP 102 outputs the generated analog sound signal to the sound output unit 150.
  • FIG. 5 is a diagram showing the configuration of the sound output system of 1 of the motorcycle. As shown in FIG. 5, the sound output system is mounted on the controller board 145. A DSP 102 and a signal amplification unit 160 are mounted on the controller board 145. In addition to this, the controller board 145 is equipped with a power supply unit that supplies battery power to the DSP 102. The illustration of the power supply unit is omitted.
  • the signal amplification unit 160 includes a first AMP161, a second AMP162, a third AMP163, a fourth AMP164, a fifth AMP165, a sixth AMP166, a seventh AMP167, and an eighth AMP168.
  • AMP is a notation that omits Amplifier.
  • the first AMP 161 is connected to the first speaker 61.
  • the second AMP 162 is connected to the second speaker 62.
  • the first AMP 161 amplifies the input sound signal and outputs it to the first speaker 61.
  • the second AMP 162 amplifies the input sound signal and outputs it to the second speaker 62.
  • the third AMP 163 is connected to the third speaker 63.
  • the 4th AMP 164 is connected to the 4th speaker 64.
  • the fifth AMP 165 is connected to the fifth speaker 65.
  • the sixth AMP 166 is connected to the sixth speaker 66.
  • the third AMP 163 amplifies the input sound signal and outputs it to the third speaker 63.
  • the fourth AMP 164 amplifies the input sound signal and outputs it to the second speaker 62.
  • the fifth AMP 165 amplifies the input sound signal and outputs it to the fifth speaker 65.
  • the sixth AMP 166 amplifies the input sound signal and outputs it to the sixth speaker 66.
  • the 7th AMP 167 is connected to the 7th speaker 67.
  • the eighth AMP 168 is connected to the eighth speaker 68.
  • the 7th AMP 167 amplifies the input sound signal and outputs it to the 7th speaker 67.
  • the eighth AMP 168 amplifies the input sound signal and outputs it to the second speaker 62.
  • the control unit 110 of the control device 100 is a computer device including a storage unit 120 and a processor 130.
  • the storage unit 120 includes a memory such as a ROM or a RAM.
  • ROM is a notation that abbreviates Read Only Memory.
  • RAM is a notation that omits Random access memory.
  • the storage unit 120 stores the control program 121 executed by the processor 130.
  • the control program 121 includes an application program. Further, the storage unit 120 stores the data processed by the processor 130 when the computer program is executed and the data of the processing result.
  • the processor 130 is composed of a CPU, a microcontroller, a DSP, and the like, and controls each part of the control unit 110 by executing a program.
  • CPU is a notation that omits Central Processing Unit.
  • the processor 130 may be a SoC in which the processor 130 and the storage unit 120 are integrated. SoC is a notation that omits System-on-a-chip.
  • the control unit 110 realizes various functional configurations by the processor 130 executing the control program 121 stored in the storage unit 120.
  • the control unit 110 of the present embodiment includes an application control unit 131 and a sound image localization processing unit 132 as functional configurations. Further, the control unit 110 is connected to the vehicle information input unit 101 and the DSP 102.
  • FIG. 6 is a schematic diagram when the motorcycle 1 travels on the road.
  • FIG. 7 is a diagram showing a frequency spectrum of ambient sound of the motorcycle 1.
  • the own vehicle (motorcycle) 1 of the present embodiment travels on the road
  • the own vehicle wind noise N1 of the own vehicle 1 is observed.
  • another vehicle exhaust sound N2, another vehicle road noise sound N3, another vehicle wind noise N4, and the like of another vehicle (other vehicle other than own vehicle 1) 200 are observed.
  • the frequency spectrum which is the analysis result by the fast Fourier transform of these sounds N1 to N4
  • the exhaust sound N2 of another vehicle is observed in a higher frequency band than the wind noise N1 of the own vehicle.
  • the road noise sound N3 of another vehicle is observed in a higher frequency band than the exhaust sound N2 of another vehicle.
  • the wind noise N4 of another vehicle is observed in a higher frequency band than the road noise noise N3 of another vehicle. That is, the sound N1 of the own vehicle 1 and the sounds N2 to N4 of the other vehicle 200 can be distinguished from each other with a predetermined frequency as a boundary.
  • the helmet attenuates the amplitude of the surrounding sound, so that the sound pressure proportional to the amplitude is attenuated and reaches the driver's ear. That is, when the helmet is not worn, each sound N1 to N4 is heard as a sound having an amplitude shown by a broken line, but when the helmet is worn, each sound N1 to N4 is heard as a sound having an amplitude shown by a solid line. Therefore, there is a problem that it is difficult for the driver wearing a helmet to hear the environmental sounds such as the sounds N2 to N4 of the other vehicle 200.
  • the control unit 110 of the present embodiment controls the sound image (virtual sound source) to be localized in the direction in which the sound is generated and reproduced by the speaker array 60 based on the sound information collected by the microphone 50.
  • the application control unit 131 of the control unit 110 determines whether or not the driver satisfies a state of a predetermined condition for paying attention to the sound around the own vehicle 1, and if the predetermined condition is satisfied, the sound image localization. Control is performed to issue an instruction for sound image localization processing to the processing unit 132.
  • the application control unit 131 of the present embodiment determines whether or not the other vehicle 200 is in the approaching state as whether or not the state of the predetermined condition is satisfied. Further, the application control unit 131 determines whether or not the driving behavior change operation of the own vehicle 1 has been performed as whether or not the state of the predetermined condition is satisfied.
  • the application control unit 131 monitors and controls the sound information of the stereophonic system collected by the microphone 50. That is, the application control unit 131 monitors and controls the sound information output from the sound input unit 140 to the control unit 110 via the DSP 102. The application control unit 131 monitors whether or not the sound pressure in the preset frequency band satisfies a predetermined condition for the sound information of the stereophonic system collected by the microphone 50.
  • the application control unit 131 monitors the sound pressure in the frequency band based on the other vehicle exhaust sound N2, the other vehicle road noise sound N3, and the other vehicle wind noise N4. That is, each time the sound information of the sounds N2 to N4 is input for each of the frequency bands preset based on the sounds N2 to N4, the application control unit 131 sets the sound pressure at the time of input and before a predetermined time. The difference value of is calculated, and it is determined whether or not this difference value exceeds a preset threshold value. When the application control unit 131 determines that any of the difference values exceeds a preset threshold value, for example, as shown in FIG. 6, the other vehicle 200 is moving from the state of the broken line to the state shown by the solid line.
  • the other vehicle 200 is in a state of approaching the own vehicle 1, and an instruction for sound image localization processing at the time of approach is issued to the sound image localization processing unit 132.
  • an instruction for sound image localization processing at the time of approach is issued to the sound image localization processing unit 132. It should be noted that, instead of the case where the difference value of any of the sounds N2 to N4 exceeds the threshold value, only when all the difference values of the sounds N2 to N4 exceed the threshold value, the sound image localization processing unit 132 is approached. An instruction for sound image localization processing may be issued.
  • the application control unit 131 of the present embodiment presets the sound pressure for each of the preset frequency bands based on the sounds N2 to N4 each time the sound information of the sounds N2 to N4 is input. It is determined whether or not the threshold value is exceeded.
  • the application control unit 131 determines that the sound pressure exceeds a preset threshold value, for example, as shown by the solid line in FIG. 6, the other vehicle 200 is in a state of approaching the own vehicle 1.
  • the sound image localization processing unit 132 is instructed to perform sound image localization processing when approaching.
  • the threshold value can be set for each sound N2 to N4 based on the value between the solid line and the broken line shown in FIG. 7.
  • the application control unit 131 has sensor data of the throttle detection unit 72, the turn signal switch detection unit 73, and the brake switch detection unit 74 in order to determine whether or not the driving behavior change operation of the own vehicle 1 has been performed. To monitor. When the sensor data indicating that the throttle is being operated by the throttle detection unit 72 is input, the application control unit 131 issues an instruction to the sound image localization processing unit 132 for the sound image localization processing at the time of the throttle operation.
  • the application control unit 131 causes the sound image localization processing unit 132 to perform sound image localization processing during the left direction instruction operation. Give instructions. Further, when the sensor data indicating that the right direction instruction operation is performed is input by the turn signal switch detection unit 73, the application control unit 131 causes the sound image localization processing unit 132 to perform sound image localization processing during the right direction instruction operation. Give instructions.
  • the application control unit 131 issues an instruction to the sound image localization processing unit 132 for the sound image localization processing at the time of the brake operation.
  • the sound image localization processing unit 132 controls the DSP 102 and the signal amplification unit 160 to perform sound image localization processing for determining the position of the sound image and reproducing and outputting the sound image.
  • a sound image is a virtual sound source, and localization means determining a position. That is, it means that the driver or the like who hears the sound output from the speaker array 60 is made to perceive as if the sound source exists at the position determined by the sound image localization processing unit 132.
  • the sound image localization processing unit 132 changes the localization position of the sound image by controlling the volume of the sound output to the first speaker 61 to the eighth speaker 68 included in the sound output unit 150.
  • the sound image localization processing unit 132 of the present embodiment generates a sound image (virtual sound source) in a specific direction only when a predetermined condition for the driver or the like to pay attention to the sound around the own vehicle 1 is satisfied. Or control to increase the volume of the sound image (virtual sound source).
  • the speaker array 60 controls to reproduce the sound image only when a predetermined condition is satisfied, so that energy saving can be achieved.
  • the sound image localization processing unit 132 specifies the direction of the other vehicle 200 and the volume of the sounds N2 to N4 of the other vehicle 200 based on the sound information of the stereophonic system collected by the microphone 50 that is sequentially input.
  • the direction of the other vehicle 200 and the volume of the sounds N2 to N4 of the other vehicle are the difference in the arrival times of the sounds N1 to N4 to the first microphone 51 and the second microphone 52, the frequency change based on the vehicle speed of the own vehicle 1, and the like. It can be specified based on.
  • This specific processing may be performed by arithmetic processing, or is a collection of microphones 50 that are sequentially input by referring to the map information that stores the relationship between the vehicle speed of the own vehicle 1 and the frequencies and amplitudes of the sounds N1 to N4 in advance.
  • the direction of the other vehicle 200 and the volume of the sounds N2 to N4 of the other vehicle 200 may be specified based on the sound information of the three-dimensional sound system.
  • FIG. 8 is a diagram showing the frequency spectra of ambient sounds N2 to N4 determined by the sound image localization process at the time of approach.
  • the sound image localization processing unit 132 determines the direction of the specified other vehicle 200 as the direction in which the sound image for reproducing the sounds N2 to N4 is localized.
  • the volume of the sound image of the sounds N2 to N4 is determined to be an amplified volume so that the driver can hear the sound in the state of wearing a helmet as if he / she is not wearing a helmet.
  • the volume of the own vehicle wind noise N1 is not amplified.
  • the sound image localization processing unit 132 receives an instruction for sound image localization processing at the time of throttle operation, the volume in front of the own vehicle 1 is increased based on the sound information of the stereophonic method of the microphone 50 which is sequentially input.
  • the volume of the sound image is determined to be an amplified volume so that the sound image can be heard loudly, and the direction of localization of the sound image is determined to be in front of the own vehicle 1.
  • the sound image localization processing unit 132 receives an instruction for sound image localization processing at the time of the left direction instruction operation, the sound image localization processing unit 132 is on the left side of the own vehicle 1 based on the sound information of the stereophonic method of the microphone 50 which is sequentially input.
  • the volume of the sound image is determined to be an amplified volume so that the volume of the sound image can be heard loudly, and the direction of localization of the sound image is determined to the left of the own vehicle 1.
  • the sound image localization processing unit 132 receives the instruction of the sound image localization processing at the time of the right direction instruction operation, the sound image localization processing unit 132 is to the right of the own vehicle 1 based on the sound information of the stereophonic method of the microphone 50 which is sequentially input.
  • the volume of the sound image is determined to be an amplified volume so that the volume of the sound image can be heard loudly, and the direction of localization of the sound image is determined to the right of the own vehicle 1.
  • the sound image localization processing unit 132 receives an instruction for sound image localization processing at the time of brake operation, the volume behind the own vehicle 1 is increased based on the sound information of the stereophonic method of the microphone 50 which is sequentially input.
  • the volume of the sound image is determined to be an amplified volume so that the sound image can be heard loudly, and the direction of localization of the sound image is determined to be behind the own vehicle 1.
  • the speaker array 60 controls the signal amplification unit 160 and the DSP 102 so as to have the determined volume and the direction in which the sound image is localized. This controls the microphone 50 to localize and reproduce the sound image in the direction in which the collected sound is generated.
  • FIG. 9 is a flowchart showing the operation of the control unit 110.
  • the operation of the control unit 110 will be described with reference to FIG.
  • the control unit 110 can start the control process by receiving, for example, the input of the execution of the sound image localization process of the environmental sound by the operation unit 35.
  • the control unit 110 monitors the sound information input from the microphone 50 (step S1).
  • the control unit 110 determines the presence or absence of an approaching vehicle based on the sound information input from the microphone 50 (step S2).
  • step S4 determines that the other vehicle 200 is approaching the own vehicle 1 (step S2 / YES)
  • the control unit 110 executes the sound source amplification process in the localization direction (step S4).
  • step S4 determines whether or not a driving behavior change operation is input (step S4).
  • step S4 determines that there is no input for the change operation of the driving behavior (step S4 / NO)
  • step S4 shifts to the process of step S1.
  • control unit 110 executes the sound source amplification process in the localization direction (step S4), when detecting a nearby vehicle, the control unit 110 determines the direction of the other vehicle 200 as the direction in which the sound image is localized, and the other. The volume of the sound image of the sound N2 to N4 of the vehicle 200 is determined to be the amplified volume. Further, when the control unit 110 executes the sound source amplification process in the localization direction (step S4), when the throttle operation is detected, the control unit 110 controls the sound image so that the volume in front of the own vehicle 1 can be heard loudly. The amplified volume is determined, and the localization direction is determined in front of the own vehicle 1.
  • step S4 when the control unit 110 executes the sound source amplification process in the localization direction (step S4), when the left direction instruction operation is detected, the control unit 110 can hear the volume on the left side of the own vehicle 1 loudly.
  • the amplified volume is determined, and the localization direction is determined to the left of the own vehicle 1.
  • the control unit 110 executes the sound source amplification process in the localization direction (step S4), when the right direction instruction operation is detected, the control unit 110 so that the volume on the right side of the own vehicle 1 can be heard loudly.
  • the amplified volume is determined, and the localization direction is determined to the right of the own vehicle 1.
  • control unit 110 executes the sound source amplification process in the localization direction (step S4), when the brake operation is detected, the control unit 110 controls the sound image so that the volume behind the own vehicle 1 can be heard loudly.
  • the amplified volume is determined, and the localization direction is determined behind the own vehicle 1.
  • control unit 110 controls the DSP 102 and the signal amplification unit 160 so as to have the volume determined in step S4 and the localization position, and outputs the sound image at the target localization position. (Step S5).
  • the control unit 110 shifts to the process of step S1.
  • the own vehicle (motorcycle) 1 when the own vehicle (motorcycle) 1 travels, the ambient sound is collected by the microphone 50 of the own vehicle 1. At this time, the own vehicle 1 determines whether or not the other vehicle 200 is approaching based on the collected surrounding sounds.
  • the helmet when the helmet is worn, the sound reaches the ears of the driver or the like in a state where the sound pressure is attenuated, so that even if there is a change in the environmental sound, the change in the sound pressure tends to be small. Therefore, it is difficult for the driver to notice that the other vehicle 200 has approached based on the environmental sound.
  • the sound source localization process when the other vehicle 200 approaches, the sound source localization process is performed, the sound image is localized in the direction of the other vehicle 200, and the sounds N2 to N4 of the other vehicle 200 are produced. It is amplified and reproduced greatly. Therefore, even for a driver or the like wearing a helmet, it is easy to recognize that the other vehicle 200 is approaching based on the environmental sound.
  • the motorcycle 1 of the present embodiment when the driver performs a change operation of the driving behavior of the own vehicle 1, the environmental sound in the direction in which the own vehicle 1 is expected to move due to the change operation is greatly amplified. Will be done. Therefore, even when the driver or the like wears a helmet, it is easy to hear the environmental sound in the direction in which the own vehicle 1 moves, and it is easy to recognize the situation in the moving direction based on the environmental sound.
  • the vehicle of the present embodiment is the own vehicle 1 equipped with the speaker array 60 composed of a plurality of speakers 61 to 68, and is configured so that the localization of the sound image can be changed by the speaker array 60.
  • the own vehicle 1 is provided with a microphone 50 that collects sounds around the own vehicle 1, and the speaker array 60 localizes and reproduces the sound information collected by the microphone 50 in the direction in which the sound is generated. .. Therefore, by reproducing the surrounding sound from the generation direction by the sound image, it is possible to easily hear the environmental sound even when wearing a helmet.
  • the speaker array 60 generates a virtual sound source in a specific direction or raises the volume of the virtual sound source only under predetermined conditions under which the driver should pay attention to the sound around the own vehicle 1. Increase. Therefore, the speaker array 60 can save energy as compared with the case where a virtual sound source is always generated or the volume of the virtual sound source is increased.
  • the predetermined condition that the driver should pay attention to the sound around the own vehicle 1 is when it is detected that the other vehicle 200 is approaching, and the specific direction at that time. Is the direction in which the other vehicle 200 exists. Therefore, it is possible to easily recognize from which direction the other vehicle 200 approaches the own vehicle 1.
  • the detection that the other vehicle 200 is approaching is performed when the sound pressure in a specific frequency band of the sound information collected by the microphone 50 increases within a predetermined time. Therefore, it is possible to detect that another vehicle 200 is approaching without using a detection means other than the microphone 50.
  • the detection that the other vehicle 200 is approaching is performed when the sound pressure in a specific frequency band of the sound information collected by the microphone 50 exceeds a predetermined threshold value. Therefore, it is possible to detect that another vehicle 200 is approaching without using a detection means other than the microphone 50.
  • the predetermined condition that the driver should pay attention to the sound around the own vehicle 1 is when the operation of the own vehicle 1 is detected, and the specific direction at that time is the operation. It is a direction related to. Therefore, it is possible to easily hear the sound in the direction in which the own vehicle 1 moves by the operation.
  • the detected operation of the own vehicle 1 is a turn signal operation
  • the specific direction is the right side or the left side of the own vehicle 1. Therefore, when the turn signal operation is detected, it is possible to easily hear the right or left sound in the direction in which the own vehicle 1 is assumed to move due to the turn signal operation.
  • the detected operation of the own vehicle 1 is a brake operation
  • the specific direction is the rear of the own vehicle 1. Therefore, when the brake operation is detected, it is possible to easily hear the sound behind the vehicle 1 which is assumed to move relatively due to the brake operation.
  • the detected operation of the own vehicle 1 is a throttle operation
  • the specific direction is the front of the own vehicle 1. Therefore, when the throttle operation is detected, it is possible to easily hear the sound in front of the vehicle 1 which is assumed to move due to the throttle operation.
  • the microphone 50 is limited to include the first microphone 51 and the second microphone 52, but may include three or more microphones, as long as the microphone 50 can collect sound in a stereophonic manner.
  • the configuration in which the speaker array 60 is mounted on the motorcycle (vehicle) 1 has been described.
  • the term "mounted" on the vehicle body of the speaker array 60 includes not only the case where the speaker array 60 is directly fixed on the vehicle body but also the case where the speaker array 60 is indirectly fixed to the vehicle body by a stay or the like.
  • the speaker array 60 is not limited to the configuration in which the speaker array 60 is directly fixed to the vehicle body frame 10, but may be configured to be indirectly fixed to the vehicle body frame 10 via a stay separate from the vehicle body frame 10. It may be configured to be indirectly fixed to the vehicle body frame 10 via the 22. Further, the speaker array 60 may be fixed to the vehicle body cover 22 via a stay separate from the vehicle body cover 22. That is, the fact that the speaker array 60 is "mounted" on the vehicle is used to include a state in which the speaker array 60 and the vehicle move (exercise) together.
  • the speaker array 60 has been described as being arranged in front of the display unit 30, for example, speakers may be arranged on the left and right sides of the seat 14 or behind the display unit 30.
  • the motorcycle 1 is taken as an example as a saddle-riding vehicle, but the present invention is not limited to this, and the present invention is a three-wheeled vehicle including two front wheels or two rear wheels. It is applicable to saddle-riding vehicles and saddle-riding vehicles equipped with four or more wheels.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Mechanical Engineering (AREA)
  • Stereophonic System (AREA)

Abstract

L'invention concerne un véhicule conçu de telle sorte que le son environnemental peut être facilement entendu même si un casque est porté.　L'invention concerne également un véhicule (1) qui est équipé d'un réseau de haut-parleurs (60) constitué d'une pluralité de haut-parleurs (61-68), le véhicule étant conçu de telle sorte que l'orientation d'une source sonore virtuelle peut être modifiée à l'aide du réseau de haut-parleurs (60) ; le véhicule (1) est pourvu d'un microphone (50) qui collecte les sons autour du véhicule ; et le réseau de haut-parleurs (60) reproduit des informations sur les sons collectés par le microphone (50) de sorte que la reproduction sonore soit orientée dans la direction à partir de laquelle le son est généré.
PCT/JP2021/009094 2020-06-02 2021-03-08 Véhicule WO2021246014A1 (fr)

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JP2020096245 2020-06-02
JP2020-096245 2020-06-02

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0592767U (ja) * 1992-05-18 1993-12-17 株式会社豊田中央研究所 接近車両認識装置
JPH1142988A (ja) * 1997-07-25 1999-02-16 Yazaki Corp 車両用後側方監視方法及び車両用後側方監視装置
JP2007036610A (ja) * 2005-07-26 2007-02-08 Yamaha Corp 発音装置
JP2012173211A (ja) * 2011-02-23 2012-09-10 Toyota Motor Corp 接近車両検出装置及び接近車両検出方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0592767U (ja) * 1992-05-18 1993-12-17 株式会社豊田中央研究所 接近車両認識装置
JPH1142988A (ja) * 1997-07-25 1999-02-16 Yazaki Corp 車両用後側方監視方法及び車両用後側方監視装置
JP2007036610A (ja) * 2005-07-26 2007-02-08 Yamaha Corp 発音装置
JP2012173211A (ja) * 2011-02-23 2012-09-10 Toyota Motor Corp 接近車両検出装置及び接近車両検出方法

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