WO2012098570A1 - Dispositif de production de son - Google Patents

Dispositif de production de son Download PDF

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Publication number
WO2012098570A1
WO2012098570A1 PCT/JP2011/000196 JP2011000196W WO2012098570A1 WO 2012098570 A1 WO2012098570 A1 WO 2012098570A1 JP 2011000196 W JP2011000196 W JP 2011000196W WO 2012098570 A1 WO2012098570 A1 WO 2012098570A1
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WIPO (PCT)
Prior art keywords
sound
simulated
vehicle
control unit
traveling
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PCT/JP2011/000196
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English (en)
Japanese (ja)
Inventor
富士男 早川
Original Assignee
三菱電機株式会社
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.)
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2012553449A priority Critical patent/JP5214071B2/ja
Priority to PCT/JP2011/000196 priority patent/WO2012098570A1/fr
Publication of WO2012098570A1 publication Critical patent/WO2012098570A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q5/00—Arrangement or adaptation of acoustic signal devices
    • B60Q5/005—Arrangement or adaptation of acoustic signal devices automatically actuated
    • B60Q5/008—Arrangement or adaptation of acoustic signal devices automatically actuated for signaling silent vehicles, e.g. for warning that a hybrid or electric vehicle is approaching
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K15/00—Acoustics not otherwise provided for
    • G10K15/02—Synthesis of acoustic waves

Definitions

  • the present invention relates to a sound generator that is mounted on a low noise vehicle such as an electric vehicle and generates a sound outside the vehicle in order to recognize the vehicle.
  • a sound generator described in Patent Document 1 includes a speaker that outputs sound to the outside of a vehicle, a motor rotation sensor that detects the number of revolutions of a motor that drives the vehicle, and an accelerator opening that detects the opening of the accelerator. And a simulated running sound with an amplitude corresponding to the accelerator opening detected by the accelerator opening sensor at a frequency corresponding to the motor rotation speed detected by the motor rotation sensor.
  • Patent Document 1 also discloses an aspect in which a simulated running sound with an amplitude corresponding to the accelerator opening detected by the accelerator opening sensor is output to the outside by a speaker at a frequency corresponding to the vehicle speed detected by the vehicle speed sensor.
  • the amplitude of the simulated traveling sound is increased in accordance with the opening of the accelerator, and the frequency of the simulated traveling sound is increased with an increase in the rotational speed of the motor or the vehicle speed.
  • Patent Document 1 In the conventional technique represented by Patent Document 1, when the vehicle is accelerated, the sound pressure of the simulated running sound increases and the volume generated around the vehicle increases. For this reason, it becomes a factor of noise at night or in the vicinity of a quiet residential area or school. Conventionally, when the vehicle is traveling at a constant vehicle speed, the simulated traveling sound is also constant, and there is no change. Therefore, the pedestrian must go away from himself or not. There was a problem that it was difficult to recognize from the simulated running sound.
  • the present invention has been made to solve the above-described problem, and without increasing the sound pressure of the simulated traveling sound in accordance with the acceleration of the vehicle, the pedestrian moves away from whether the vehicle is approaching.
  • An object of the present invention is to obtain a sound generator capable of generating a simulated running sound that can easily recognize whether or not the vehicle is present.
  • the sound generation device is a sound generation device that is mounted on a moving body and outputs a simulated sound to the outside of the moving body. Is provided with a control unit that outputs a simulated sound in which the frequency gradually increases and outputs a simulated sound in which the frequency gradually decreases in the opposite direction to the traveling of the moving body.
  • FIG. 3 is a flowchart showing a flow of a generation process of simulated traveling sound by the sound generation device of the first embodiment. It is a block diagram which shows the structure of the sound generator by Embodiment 2 of this invention. It is a figure which shows the change of the reproduction time of the simulation driving
  • FIG. 6 is a flowchart illustrating a flow of a simulated running sound generation process performed by the sound generation apparatus according to the second embodiment. It is a block diagram which shows the structure of the sound generator by Embodiment 3 of this invention. It is a figure which shows the correspondence of a vehicle type and the chord pattern of a simulation running sound. 10 is a flowchart illustrating a flow of setting processing of a simulated traveling sound pattern by the sound generation device according to the third embodiment.
  • Embodiment 1 When a sound source that emits sound approaches a pedestrian, the pedestrian has the property that the frequency is increased by the Doppler effect. Therefore, the sound generation device according to Embodiment 1 emits a simulated running sound whose frequency gradually increases from the front of the vehicle on which the vehicle on which the vehicle is mounted is traveling, and to the rear of the vehicle. A simulated running sound with a gradually decreasing frequency is emitted. As a result, even when the vehicle is traveling at a constant vehicle speed, the simulated traveling sound is automatically changed to make it easier for pedestrians around the vehicle to recognize the approach of the vehicle.
  • the vehicle is approaching when the frequency of the simulated running sound is heard rising gradually, and conversely, the vehicle is separated when the frequency of the simulated running sound is heard decreasing gradually. I can recognize it. Therefore, it is possible for a pedestrian to easily recognize whether or not a low-noise vehicle is approaching from the simulated running sound.
  • FIG. 1 is a block diagram showing a configuration of a sound generator according to Embodiment 1 of the present invention.
  • a sound generator 10 according to Embodiment 1 is a device that is mounted on a low-noise vehicle such as an electric vehicle and generates a simulated traveling sound outside the vehicle, and includes a simulated traveling sound waveform storage unit 11 and a vehicle speed sensor 12.
  • a running condition storage unit 13 a display unit 14, a control unit 15, a running sound signal processing unit 16, amplifiers 17a and 17b, and speakers 18a and 18b.
  • the simulated traveling sound waveform storage unit 11 is a storage unit that stores waveform data of simulated traveling sound.
  • the vehicle speed sensor 12 is a sensor that detects a vehicle speed signal such as a vehicle speed pulse, and outputs the detected vehicle speed signal to the control unit 15 via an in-vehicle LAN (Local Area Network) or the like.
  • the control unit 15 calculates the vehicle speed of the vehicle on which the device 10 is mounted from the vehicle speed signal detected by the vehicle speed sensor 12.
  • the travel condition storage unit 13 is a storage unit that stores travel condition information indicating the relationship between the vehicle speed of the vehicle on which the sound generator 10 is mounted and the speed at which the frequency of the simulated travel sound is increased.
  • the display unit 14 is a display monitor that displays information presented from the sound generator 10 to the outside, and displays whether the sound emission of the simulated traveling sound is on or off, the frequency of the traveling sound, a change in the frequency, and the like.
  • the control unit 15 is a component that controls each component of the sound generator 10, and the simulated traveling sound indicated by the simulated traveling sound data in the simulated traveling sound waveform storage unit 11 is sounded according to the traveling condition information in the traveling condition storage unit 13.
  • the traveling sound signal processing unit 16 is controlled to radiate.
  • the traveling sound signal processing unit 16 is a component that processes a simulated traveling sound signal to be output in accordance with control from the control unit 15.
  • the amplifiers 17 a and 17 b are amplifiers that amplify the simulated traveling sound signal processed by the traveling sound signal processing unit 16.
  • the speakers 18a and 18b radiate the simulated running sound signal amplified by the amplifiers 17a and 17b to the outside of the vehicle.
  • the speaker 18a is attached to the front portion of the vehicle on which the sound generator 10 is mounted, toward the outside of the vehicle or toward the front of the vehicle.
  • it is built in a housing of a door mirror or a fender mirror, and in the case of a right side door mirror, it is attached toward the front right of the vehicle, and in the case of a left side door mirror, it is attached toward the left front of the vehicle.
  • the speaker 18b is attached to the rear portion of the vehicle, for example, near the taillight. In this case, when it is near the right light, it is attached toward the right rear of the vehicle, and when it is near the left light, it is attached toward the left rear of the vehicle. Note that the speakers 18a and 18b only need to be attached to at least the front and rear portions in the traveling direction of the vehicle, and may be attached to the side surface of the vehicle so as to emit sound to the side.
  • FIG. 2 is a diagram illustrating an example of frequency components of simulated running sound generated by the sound generator according to the first embodiment.
  • frequency components f0, f1,... are frequency components of engine sound recorded from an actual vehicle.
  • the engine sound is referred to as a simulated engine sound.
  • the frequency component f0 is the lowest frequency component
  • a frequency component T indicated by a broken line in FIG. 2 is a frequency component of tire noise, and is a recording of tire noise generated when an actual vehicle travels at a predetermined speed.
  • the tire noise is referred to as simulated road noise.
  • the sound pressure level of the simulated road noise is set to be smaller than that of the simulated engine sound within the range of speed traveling on a general road.
  • the simulated road noise may be a continuous spectrum having 1 / f fluctuation.
  • the simulated running sound of the present invention has a configuration in which the simulated engine sound and simulated road noise shown in FIG. 2 are mixed.
  • a sound is generated so that the frequency of the mixed sound gradually increases. That is, the mixed sound of the frequency components f0, f1, f2,... Of the simulated engine sound and the frequency component T of the simulated road noise shown in FIG.
  • the simulated traveling sound radiated from the rear of the vehicle shifts the mixed sound to the low frequency range as a whole.
  • FIG. 3 is a diagram showing the stored contents of the simulated traveling sound waveform storage unit of FIG.
  • simulated traveling sound waveform data S0 to S13 are the mixed traveling sounds shown in FIG.
  • the simulated traveling sound waveform data S0 is waveform data of traveling sound having the lowest frequency component of the chord of the frequency components f0, f1,... Of the simulated engine sound and the frequency component T of the simulated road noise.
  • the simulated traveling sound waveform data S1 is waveform data of traveling sound having a higher frequency component than the simulated traveling sound waveform data S0, and the frequency components are higher in the order of the simulated traveling sound waveform data S2, S3, S4,. Become. Therefore, by reproducing the simulated traveling sound waveform data S0, S1, S2,... In this order, the mixed sound shown in FIG. On the contrary, by reproducing the simulated traveling sound waveform data S13, S12, S11,... In this order, the mixed sound shown in FIG.
  • the lowest frequency component f0 among the frequency components of the simulated engine sound is assigned to the frequency of the 7th tone scale (doremifasolaside).
  • the lowest frequency component f0 in the simulated engine sound of the simulated traveling sound waveform data S0 is set to 55.0 Hz. That is, in the simulated running sound waveform data S0, the frequency component is shifted so that the lowest frequency component f0 among the frequency components of the engine sound recorded from the actual vehicle is 55.0 Hz of the pitch name “La”.
  • the frequency components f1, f2,... The simulated engine sound waveform data S0 is created by similarly shifting the frequency components of the recorded engine sound at the same ratio.
  • the frequency of the pitch name A4 (La) is represented as 440.0 Hz. Therefore, in the example of FIG. 3, the frequency 55.0 Hz of the lowest frequency component f0 in the simulated engine sound of the simulated traveling sound waveform data S0 is represented by A1 (La).
  • the waveform data S1 of the simulated running sound is created by shifting the frequency component so that the lowest frequency component f0 of the simulated engine sound of the simulated running sound waveform data S1 is 61.25 Hz of the pitch name “shi”. .
  • a frequency component f0 of 61.25 Hz in the simulated engine sound of the simulated traveling sound waveform data S1 is represented by B1.
  • the lowest frequency component f0 among the simulated engine sound frequency components of the simulated traveling sound waveform data S2 is set to 65.406 Hz of the pitch name “do” and is represented by C2, and the frequency component of the simulated traveling sound waveform data S3.
  • f0 is set to 73.45 Hz of the pitch name “Re” and is represented by D2.
  • the lowest frequency component f0 among the frequency components of the simulated engine sound of the simulated traveling sound waveform data S4 is set to 82.4 Hz of the pitch name “Mi” and is represented by E2, and the frequency component f0 of the simulated traveling sound waveform data S5 is represented by E2.
  • the pitch name “Fa” is set to 87.3 Hz and expressed by F2.
  • the frequency component f0 of the simulated running sound waveform data S6 is set to 98.0 Hz of the pitch name “So” and expressed as G0, and the frequency component f0 of the simulated running sound waveform data S7 is set to 110.0 Hz of the pitch name “La”. And represented by A2.
  • B2 sin
  • C3 do
  • D3 le
  • E3 mi
  • F3 fa
  • G3 Set each.
  • FIG. 4 is a flowchart showing the flow of the generation process of the simulated running sound by the sound generator of the first embodiment.
  • the control unit 15 specifies the vehicle speed of the vehicle on which the sound generation device 10 is mounted from the detection output of the vehicle speed signal by the vehicle speed sensor 12, and determines whether or not the vehicle speed is a predetermined value or more (step ST2). ). For example, by setting a predetermined value of the vehicle speed between 1 km / h and 5 km / h, it is possible to determine whether or not the vehicle has started moving from the comparison result between the predetermined value and the vehicle speed. At this time, if it is determined that the vehicle speed is not equal to or higher than the predetermined value (step ST2; NO), the process is terminated.
  • step ST2 when it is determined that the vehicle speed is equal to or higher than the predetermined value (step ST2; YES), the control unit 15 reads the simulated traveling sound waveform data S0 having the lowest frequency component f0 from the simulated traveling sound waveform storage unit 11, and the frequency.
  • the simulated running sound waveform data Sn having the highest component f0 is read (step ST3).
  • control unit 15 controls the traveling sound signal processing unit 16 to generate simulated traveling sound waveform data S0 having the lowest frequency component f0 from the speaker 18a installed at the front of the vehicle via the amplifier 17a.
  • the simulated traveling sound waveform data Sn having the highest frequency component f0 is radiated from the speaker 18b installed at the rear of the vehicle via the amplifier 17b (step ST4).
  • the control unit 15 When the simulated traveling sound waveform data S0 and Sn are radiated from the speakers 18a and 18b, respectively, the control unit 15 counts the reproduction time that is the time when sound emission is performed from the start, and the reproduction time is counted. Then, it is determined whether or not it is equal to or longer than a predetermined time ⁇ read from the traveling condition storage unit 13 (step ST5).
  • a predetermined time ⁇ is set to allow time for the simulated traveling sound to reach a pedestrian outside the vehicle and for the pedestrian to notice the simulated traveling sound. For example, a value between 0.1 seconds and 100 seconds is set.
  • step ST6 If it is determined that the reproduction time is equal to or greater than the predetermined time ⁇ (step ST5; YES), the control unit 15 adds +1 to the index k (step ST6) and returns to the process of step ST2.
  • the control unit 15 reads the next simulated traveling sound waveform data from the simulated traveling sound waveform storage unit 11.
  • k 1, simulated traveling sound waveform data S1, Sn-1 (S12) is read in step ST3.
  • the frequency component f0 of the simulated traveling sound waveform data S1 is B1 (61.25 Hz)
  • the frequency component f0 of the simulated traveling sound waveform data S12 is F3 (196.0 Hz).
  • step ST4 the simulated traveling sound waveform data S1 is reproduced following the simulated traveling sound waveform data S0, and a simulated traveling sound whose frequency gradually increases is emitted from the front of the vehicle. Further, from the rear of the vehicle, simulated traveling sound waveform data Sn-1 is reproduced following simulated traveling sound waveform data Sn, so that a simulated traveling sound whose frequency gradually decreases is emitted.
  • the frequency of the simulated traveling sound gradually increases toward the front where the low-noise vehicle travels, and the frequency of the simulated traveling sound decreases toward the rear. Radiates sound like so.
  • a pedestrian outside the vehicle can recognize that a low-noise vehicle such as EV or HV is approaching by listening to an increase in the frequency of the simulated running sound, and the vehicle is close It can be recognized by listening to the decrease in the frequency of the simulated running sound that the vehicle is moving away from the vehicle. In particular, it is effective for ensuring the safety of pedestrians who are blind.
  • a simulated traveling sound may be generated in combination with a navigation device and a sound generator mounted on the vehicle.
  • the sound generation device 10 is notified from the navigation device mounted on the vehicle that the vehicle has approached a predetermined point and a predetermined facility on the map, the vehicle travels forward using the notification as a trigger. Radiates sound so that the frequency of the simulated running sound gradually rises, and when the vehicle is notified that the vehicle has passed through the predetermined point and the predetermined facility, the simulated driving from the rear of the vehicle is triggered by the notification. Sound is emitted so that the frequency of the sound decreases.
  • control unit 15 holds a time zone in which the number of pedestrians increases at a predetermined point and a predetermined facility on the map, and the own vehicle approaches the predetermined point and the predetermined facility and the number of pedestrians is increased.
  • the speakers 18a and 18b are mounted on the front and rear parts of the vehicle, a single speaker may be provided.
  • a rotating mechanism is provided, and when the sound radiation direction is toward the front of the vehicle, a simulated running sound whose frequency increases is sounded.
  • the control unit 15 can easily control so as to emit a simulated traveling sound whose frequency decreases.
  • the simulated engine sound and the simulated road noise frequency shown in FIG. 2 increase and decrease simultaneously, the simulated running sound increases only the frequencies of the simulated engine sounds f0, f1,. Even if it is a case, the pedestrian can hear the rise or fall of a frequency, and can acquire the same effect.
  • Embodiment 2 When the traveling speed of the vehicle is high, it is safer if the approach of the vehicle is notified to a pedestrian outside the vehicle in a short time. Therefore, in the second embodiment, the speed at which the frequency of the simulated traveling sound changes is changed according to the vehicle speed. That is, when the vehicle speed is high, the speed at which the frequency of the simulated traveling sound is increased and decreased is increased.
  • FIG. 5 is a block diagram showing a configuration of a sound generator according to Embodiment 2 of the present invention.
  • the sound generator 10A according to the second embodiment is mounted on a low-noise vehicle such as an electric vehicle, as in the first embodiment.
  • the sound generator 10 ⁇ / b> A is the same as the embodiment shown in FIG. 1 in place of the travel condition storage unit 13, the control unit 15, and the travel sound signal processing unit 16.
  • 2 includes a traveling condition storage unit 13A in which a traveling condition unique to 2 is set, a control unit 15A that performs unique processing, and a traveling sound signal processing unit 16A, and further includes a pedestrian detection unit 19 that detects pedestrians around the vehicle. Prepare.
  • the traveling condition storage unit 13A is a storage unit that stores the reproduction time of simulated traveling sound waveform data for each vehicle speed range as traveling condition information. For example, if the vehicle speed is in the high speed range, the shortest reproduction time is set. If the vehicle speed is in the medium speed range, the reproduction time is longer than that in the high speed range. If the vehicle speed is in the low speed range, the longest reproduction time is stored.
  • the controller 15A is a component that controls each component of the sound generator 10A. The controller 15A generates simulated traveling sounds indicated by the simulated traveling sound data in the simulated traveling sound waveform storage unit 11 according to the traveling condition information in the traveling condition storage unit 13A.
  • the traveling sound signal processing unit 16A is controlled to radiate.
  • the traveling sound signal processing unit 16A is a component that processes a simulated traveling sound signal to be output in accordance with control from the control unit 15A.
  • the pedestrian detection unit 19 is a component that detects pedestrians and the like around the vehicle.
  • an ultrasonic signal is sent to the detection target, and an ultrasonic sensor that detects the pedestrian by receiving the ultrasonic signal reflected by the detection target or a camera is used. This can be realized by using an image analysis unit that recognizes a pedestrian outside the vehicle.
  • the detection information of the pedestrian detected by the pedestrian detection part 19 is output to 15 A of control parts.
  • FIG. 6 is a diagram showing a change in the reproduction time of the simulated traveling sound according to the vehicle speed, and shows a case where sound is emitted so that the frequency of the simulated traveling sound gradually increases from the front where the vehicle travels.
  • the frequency of the simulated traveling sound increases stepwise for each reproduction time ⁇ .
  • the reproduction time ⁇ is set as the longest reproduction time, and the reproduction time is set to a minimum reproduction speed range from 1 km / h to less than 10 km / h.
  • the frequency of the simulated traveling sound increases stepwise for each reproduction time 3 ⁇ / 4.
  • the regeneration time 3 ⁇ / 4 is set to a regeneration time of a vehicle speed of 10 km / h to less than 40 km / h, which is a low speed range.
  • the frequency of the simulated traveling sound increases stepwise for each reproduction time ⁇ / 2.
  • the regeneration time ⁇ / 2 is set to a regeneration time from a vehicle speed of 40 km / h, which is a medium speed range, to less than 80 km / h.
  • the frequency of the simulated traveling sound increases stepwise for each reproduction time ⁇ / 4.
  • the regeneration time ⁇ / 4 is set to a regeneration time of a vehicle speed of 80 km / h or higher, which is a high speed range.
  • the relationship between the vehicle speed range as shown in FIG. 6 and the reproduction time corresponding thereto is stored in the traveling condition storage unit 13A as traveling condition information.
  • the example of FIG. 6 shows the case where the frequency of the simulated traveling sound increases.
  • the frequency of the simulated traveling sound gradually decreases, the frequency is changed over time according to the same traveling condition. For example, from the rear of a vehicle traveling at a vehicle speed in the lowest speed range, sound is emitted so that the frequency of the simulated traveling sound decreases every regeneration time ⁇ . From the rear of a vehicle traveling at a vehicle speed in the high speed range, simulated traveling is performed. The sound is emitted so that the frequency of the sound decreases every reproduction time ⁇ / 2.
  • FIG. 7 is a flowchart showing the flow of the generation process of the simulated running sound by the sound generator of the second embodiment.
  • the control unit 15A specifies the vehicle speed of the host vehicle on which the sound generation device 10A is mounted from the detection output of the vehicle speed signal by the vehicle speed sensor 12, and determines whether or not the vehicle speed is a predetermined value or more (step). ST2a). For example, by setting a predetermined value of the vehicle speed between 1 km / h and 5 km / h, it is possible to determine whether or not the vehicle has started to move from the comparison result between the predetermined value and the vehicle speed. At this time, if it is determined that the vehicle speed is not equal to or higher than the predetermined value (step ST2a; NO), the process is terminated.
  • step ST3a the controller 15A further determines whether or not the vehicle speed of the host vehicle is within the minimum speed range.
  • the control unit 15A reads the simulated traveling sound waveform data S0 having the lowest frequency component f0 from the simulated traveling sound waveform storage unit 11.
  • the simulated running sound waveform data Sn having the highest frequency component f0 is read (step ST4a).
  • control unit 15A controls the running sound signal processing unit 16A to generate simulated running sound waveform data S0 having the lowest frequency component f0 from the speaker 18a installed at the front of the vehicle via the amplifier 17a.
  • the simulated traveling sound waveform data Sn having the highest frequency component f0 is radiated from the speaker 18b installed at the rear of the vehicle via the amplifier 17b (step ST5a).
  • the control unit 15A When the simulated traveling sound waveform data S0 and Sn are emitted from the speakers 18a and 18b, respectively, the control unit 15A counts the reproduction time that is the time when sound emission is performed from the start, and the reproduction time is It is determined whether or not it is equal to or longer than a predetermined time ⁇ read from the traveling condition storage unit 13A (step ST6a). If the reproduction time is not equal to or longer than the predetermined time ⁇ (step ST6a; NO), the process returns to step ST5a to repeatedly emit the same simulated traveling sound waveform data S0 and Sn.
  • step ST6a If it is determined that the reproduction time is equal to or longer than the predetermined time ⁇ (step ST6a; YES), the control unit 15A adds +1 to the index k (step ST7a), and determines whether the index k is equal to the value of n. (Step ST8a). If the index k is not equal to the value of n (step ST8a; NO), the process returns to step ST4a.
  • step ST8a; YES the control unit 15A determines whether or not a pedestrian is detected around the host vehicle by the pedestrian detection unit 19 (step ST9a). ). At this time, when a pedestrian is detected around the host vehicle (step ST9a; YES), the control unit 15A returns to step ST1a and repeats the sound emission of the simulated traveling sound at the reproduction time corresponding to the vehicle speed. That is, from the front of the vehicle, when the simulated traveling sound waveform data S13 is reproduced, the sound radiation is repeatedly returned to the original simulated traveling sound waveform data S0 and gradually increases in frequency in the reproduction time corresponding to the vehicle speed. Done.
  • step ST10a determines whether the vehicle speed of the host vehicle is within the low speed range.
  • step ST10a determines whether the vehicle speed of the host vehicle is within the low speed range.
  • step ST10a determines whether the vehicle speed of the host vehicle is within the low speed range.
  • step ST10a determines whether the vehicle speed of the host vehicle is within the low speed range.
  • step ST10a determines whether the vehicle speed of the host vehicle is within the low speed range.
  • step ST10a YES
  • the control unit 15A reads the simulated traveling sound waveform data S0 having the lowest frequency component f0 from the simulated traveling sound waveform storage unit 11. Then, the simulated running sound waveform data Sn having the highest frequency component f0 is read (step ST11a).
  • control unit 15A controls the running sound signal processing unit 16A to generate simulated running sound waveform data S0 having the lowest frequency component f0 from the speaker 18a installed at the front of the vehicle via the amplifier 17a.
  • the simulated traveling sound waveform data Sn having the highest frequency component f0 is emitted from the speaker 18b installed at the rear of the vehicle via the amplifier 17b (step ST12a).
  • the control unit 15A When the simulated traveling sound waveform data S0 and Sn are emitted from the speakers 18a and 18b, respectively, the control unit 15A counts the reproduction time that is the time when sound emission is performed from the start, and the reproduction time is It is determined whether or not the predetermined time 3 ⁇ / 4 or more read from the travel condition storage unit 13A (step ST13a). Here, if the reproduction time is not equal to or longer than the predetermined time 3 ⁇ / 4 (step ST13a; NO), the process returns to step ST12a to repeatedly emit the same simulated traveling sound waveform data S0 and Sn.
  • step ST13a If it is determined that the playback time has reached the predetermined time 3 ⁇ / 4 or more (step ST13a; YES), the control unit 15A adds +1 to the index k (step ST14a), and whether or not the index k is equal to the value of n. Is determined (step ST15a). If the index k is not equal to the value of n (step ST15a; NO), the process returns to step ST11a.
  • step ST15a; YES the control unit 15A determines whether or not a pedestrian is detected around the host vehicle by the pedestrian detection unit 19 (step ST16a). ). At this time, when a pedestrian is detected around the own vehicle (step ST16a; YES), the control unit 15A returns to step ST1a and repeats the sound emission of the simulated traveling sound at the reproduction time corresponding to the vehicle speed. That is, from the front of the vehicle, when the simulated traveling sound waveform data S13 is reproduced, the sound radiation is repeatedly returned to the original simulated traveling sound waveform data S0 and gradually increases in frequency in the reproduction time corresponding to the vehicle speed. Done.
  • step ST10a determines whether the vehicle speed of the host vehicle is in the low speed range (step ST10a; NO).
  • the control unit 15A reads the simulated traveling sound waveform data S0 having the lowest frequency component f0 from the simulated traveling sound waveform storage unit 11.
  • the simulated running sound waveform data Sn having the highest frequency component f0 is read (step ST18a).
  • control unit 15A controls the running sound signal processing unit 16A to generate simulated running sound waveform data S0 having the lowest frequency component f0 from the speaker 18a installed at the front of the vehicle via the amplifier 17a.
  • the simulated traveling sound waveform data Sn having the highest frequency component f0 is emitted from the speaker 18b installed at the rear of the vehicle via the amplifier 17b (step ST19a).
  • the control unit 15A When the simulated traveling sound waveform data S0 and Sn are emitted from the speakers 18a and 18b, respectively, the control unit 15A counts the reproduction time that is the time when sound emission is performed from the start, and the reproduction time is It is determined whether or not the predetermined time ⁇ / 2 or more read from the traveling condition storage unit 13A (step ST20a). If the reproduction time is not equal to or longer than the predetermined time ⁇ / 2 (step ST20a; NO), the process returns to step ST19a to repeatedly emit the same simulated traveling sound waveform data S0 and Sn.
  • step ST20a If it is determined that the reproduction time has become equal to or longer than the predetermined time ⁇ / 2 (step ST20a; YES), the control unit 15A adds +1 to the index k (step ST21a), and whether or not the index k is equal to the value of n. Is determined (step ST22a). If the index k is not equal to the value of n (step ST22a; NO), the process returns to step ST18a.
  • step ST22a; YES determines whether or not a pedestrian is detected around the host vehicle by the pedestrian detection unit 19 (step ST23a). ). At this time, when a pedestrian is detected around the own vehicle (step ST23a; YES), the control unit 15A returns to step ST1a and repeats the sound emission of the simulated traveling sound at the reproduction time corresponding to the vehicle speed. That is, from the front of the vehicle, when the simulated traveling sound waveform data S13 is reproduced, the sound radiation is repeatedly returned to the original simulated traveling sound waveform data S0 and gradually increases in frequency in the reproduction time corresponding to the vehicle speed. Done.
  • step ST17a When it is determined that the vehicle speed of the host vehicle is not in the medium speed range (step ST17a; NO), the control unit 15A further determines whether or not the vehicle speed of the host vehicle is in the high speed range (step ST24a).
  • step ST24a when the vehicle speed of the host vehicle is not within the high speed range (step ST24a; NO), the control unit 15A returns to step ST2a and repeats the above-described processing.
  • the control unit 15A reads out the simulated traveling sound waveform data S0 having the lowest frequency component f0 from the simulated traveling sound waveform storage unit 11, and the frequency component.
  • the simulated running sound waveform data Sn having the highest f0 is read (step ST25a).
  • control unit 15A controls the running sound signal processing unit 16A to generate simulated running sound waveform data S0 having the lowest frequency component f0 from the speaker 18a installed at the front of the vehicle via the amplifier 17a.
  • the simulated traveling sound waveform data Sn having the highest frequency component f0 is radiated from the speaker 18b installed at the rear of the vehicle via the amplifier 17b (step ST26a).
  • the control unit 15A When the simulated traveling sound waveform data S0 and Sn are emitted from the speakers 18a and 18b, respectively, the control unit 15A counts the reproduction time that is the time when sound emission is performed from the start, and the reproduction time is It is determined whether or not the predetermined time ⁇ / 4 or more read from the traveling condition storage unit 13A (step ST27a). Here, if the reproduction time is not equal to or longer than the predetermined time ⁇ / 4 (step ST27a; NO), the process returns to step ST26a to repeatedly emit the same simulated traveling sound waveform data S0 and Sn.
  • step ST27a If it is determined that the reproduction time has become equal to or greater than the predetermined time ⁇ / 4 (step ST27a; YES), the control unit 15A adds +1 to the index k (step ST28a), and whether or not the index k is equal to the value of n. Is determined (step ST29a). If the index k is not equal to the value of n (step ST29a; NO), the process returns to step ST25a.
  • step ST29a; YES the control unit 15A determines whether or not a pedestrian is detected around the host vehicle by the pedestrian detection unit 19 (step ST30a). ). At this time, when a pedestrian is detected around the host vehicle (step ST30a; YES), the control unit 15A returns to step ST1a and repeats the sound emission of the simulated traveling sound at the reproduction time corresponding to the vehicle speed. That is, from the front of the vehicle, when the simulated traveling sound waveform data S13 is reproduced, the sound radiation is repeatedly returned to the original simulated traveling sound waveform data S0 and gradually increases in frequency in the reproduction time corresponding to the vehicle speed. Done.
  • the simulated running sound is emitted from the front of the host vehicle so that the frequency gradually increases in the reproduction time corresponding to the vehicle speed of the host vehicle. From the rear, a simulated running sound is emitted so that the frequency gradually decreases in the reproduction time corresponding to the vehicle speed of the host vehicle.
  • the range of the simulated running sound that is reproduced according to the vehicle speed of the host vehicle may be divided. For example, when the vehicle speed is fast, simulated running sounds S7 to S13 in the high frequency range are reproduced, and when the vehicle speed is slow, simulated running sounds S0 to S6 in the low frequency range are reproduced. Even in this way, the pedestrian can intuitively recognize the approaching or leaving of the vehicle from the simulated running sound.
  • a simulated running sound may be emitted when the pedestrian detection unit 19 detects a pedestrian around the host vehicle.
  • the control unit 15A controls the traveling sound signal processing unit 16A and the speaker 18a provided at the front part where the vehicle travels.
  • a simulated traveling sound with a gradually increasing frequency is output from the vehicle, and a simulated traveling sound with a gradually decreasing frequency is output from a speaker 18b provided at the rear of the vehicle.
  • Embodiment 3 On actual roads, not only ordinary passenger cars but also various vehicles with different vehicle sizes and running speeds are running from large automobiles to motorcycles and bicycles. Therefore, in this third embodiment, by setting a chord pattern of simulated running sound according to the type of vehicle, a pedestrian can recognize the type of vehicle from the simulated running sound, and avoidance behavior according to the type of vehicle. It is intended to take.
  • FIG. 8 is a block diagram showing a configuration of a sound generator according to Embodiment 3 of the present invention.
  • the sound generator 10B according to the third embodiment is mounted on a low noise vehicle such as an electric vehicle, as in the first embodiment.
  • the sound generator 10B is implemented in place of the simulated traveling sound waveform storage unit 11, the control unit 15, and the traveling sound signal processing unit 16 in the configuration shown in FIG.
  • a simulated traveling sound waveform storage unit 11A that stores waveform data of a simulated traveling sound pattern unique to the second embodiment, a control unit 15B that performs unique processing, and a traveling sound signal processing unit 16B, and further includes a simulated sound pattern setting unit 20 Prepare.
  • the simulated traveling sound waveform storage unit 11A is a storage unit that stores simulated traveling sound waveform data and also stores simulated traveling sound waveform data of a chord pattern corresponding to the vehicle type of the host vehicle.
  • the controller 15B is a component that controls each component of the sound generator 10B.
  • the controller 15B generates a simulated running sound of a chord pattern according to the vehicle type of the host vehicle stored in the simulated running sound waveform storage unit 11A.
  • the traveling sound signal processing unit 16B is controlled so as to emit sound according to the traveling condition information.
  • the traveling sound signal processing unit 16B is a component that processes a simulated traveling sound signal to be output in accordance with control from the control unit 15B.
  • the simulated sound pattern setting unit 20 refers to information indicating a relationship between a preset chord pattern of the simulated traveling sound and the vehicle type, and identifies a chord pattern of the simulated traveling sound according to the vehicle type indicated by the vehicle type information Part.
  • the control unit 15B selects chord data that matches the chord pattern of the simulated traveling sound specified by the simulated sound pattern setting unit 20 from the simulated traveling sound chord data stored in the simulated traveling sound waveform storage unit 11A.
  • a waveform of a chord pattern of simulated traveling sound corresponding to the vehicle type is formed and stored in the simulated traveling sound waveform storage unit 11A.
  • the simulated sound pattern setting unit 20 acquires the vehicle type information of the host vehicle via, for example, the in-vehicle LAN, and selects a pattern corresponding to the vehicle type predetermined in the vehicle type information.
  • FIG. 9 is a diagram showing the correspondence between the vehicle type and the chord pattern of the simulated running sound.
  • the table data indicating the relationship between the vehicle type shown in FIG. 9 and the chord pattern of the simulated running sound is preset in the simulated sound pattern setting unit 20. Further, in the example shown in FIG. 9, 7 tones (A (ra), B (si), C (do), D (le), E (mi), F (fa), G (so)) to 3 A case where a chord pattern is created by combining two sounds is shown, and patterns 1 to 11 are assigned according to the size of the vehicle.
  • A4 (440 Hz) is used as a reference.
  • (A2, B1, C2) represents a combination of three sounds, a rale, a squeal, and a beep
  • (A1, B1, D2) represents a combination of a rap, a squeal, and a sound
  • E3 represents a combination of a ra sound, a creaking sound, and a mi sound.
  • the combination of the three sounds (A1, B1, C2) is the same three sounds as (A1, B1, D2) and (A1, B1, E3), regardless of whether the frequencies of the three sounds are increased or decreased simultaneously. It will never be a combination.
  • the vehicle type information is set to Pattern 1 for large vehicles, Pattern 2 for medium-sized vehicles, Pattern 3 for ordinary passenger vehicles, and Pattern 4 for ordinary trucks.
  • the simulated sound pattern setting unit 20 specifies the chord pattern of the simulated traveling sound corresponding to the vehicle type indicated by the vehicle type information with reference to the information indicating the correspondence between the chord pattern of the simulated traveling sound and the vehicle type as shown in FIG. To do.
  • the control unit 15B selects data that matches the chord pattern specified by the simulated sound pattern setting unit 20 from the chord data of the simulated traveling sound stored in the simulated traveling sound waveform storage unit 11A, and according to the vehicle type. A waveform of the chord pattern of the simulated running sound is formed.
  • FIG. 10 is a flowchart showing a flow of a setting process of a simulated running sound pattern by the sound generator of the third embodiment.
  • the control unit 15B determines whether or not to set a simulated traveling sound pattern according to the vehicle type of the host vehicle based on input settings via an input unit (not shown) (step ST1b).
  • the control unit 15B instructs the simulated sound pattern setting unit 20 to specify the vehicle type of the host vehicle.
  • the simulated sound pattern setting unit 20 When the simulated sound pattern setting unit 20 receives an instruction from the control unit 15B, the simulated sound pattern setting unit 20 extracts the vehicle type of the host vehicle from the vehicle type information received via the in-vehicle LAN, and based on the vehicle type, the chord of the simulated running sound shown in FIG.
  • the chord pattern of the simulated running sound according to the vehicle type of the host vehicle is specified with reference to information indicating the correspondence between the pattern and the vehicle type.
  • pattern 1 is used when the vehicle type of the host vehicle is a large vehicle
  • pattern 2 is used when the vehicle is a medium size vehicle
  • pattern 3 is used when the vehicle is a normal passenger car
  • pattern 4 is used when the vehicle is a normal truck.
  • Information indicating the identified simulated traveling sound pattern (pattern 1, pattern 2,...) Is notified from the simulated sound pattern setting unit 20 to the control unit 15B.
  • the control unit 15 ⁇ / b> B calculates a chord that matches the chord pattern from the chord data of the simulated traveling sound stored in the simulated traveling sound waveform storage unit 11 ⁇ / b> A.
  • the data is selected, waveform data of the chord pattern of the simulated traveling sound corresponding to the vehicle type is formed, and stored in the simulated traveling sound waveform storage unit 11A (step ST2b).
  • the chord data A3, B3, C3 is specified from the simulated traveling sound waveform storage unit 11A, and the chord pattern (A3, B3, C3) is simulated running. It is stored in the sound waveform storage unit 11A.
  • the simulated traveling sound pattern stored in the simulated traveling sound waveform storage unit 11A is emitted from the front of the vehicle as a simulated traveling sound whose frequency increases and from the rear of the vehicle as simulated traveling sound whose frequency decreases.
  • the vehicle type is a normal passenger car
  • it is pattern 3 (A2, B2, E3).
  • From the front of the vehicle (A2, B2, E3), (B2, C3, F3), (C3, D3, G3) ), (D3, E3, A3),...
  • From the rear of the vehicle (A2, B2, E3), (G2, A2, D3), (F2, G2, C3), (E2, F2, B3),. It is played back in descending order.
  • the simulated sound pattern setting unit 20 acquires the vehicle type information via the in-vehicle LAN, but the vehicle type information may be stored in the memory in the simulated sound pattern setting unit 20. .
  • a setting terminal is provided in the sound generator 10B according to the third embodiment, and a simulated running sound pattern is set based on a combination of whether the voltage applied to the seven terminals is high or low. You can configure it.
  • the simulated running sound pattern is expressed by a combination of three sounds.
  • the simulated running sound pattern may be a combination of chords in which four sounds are selected from seven sounds, or five sounds. Or a combination of 6 sounds.
  • the frequency rises and falls from the same chord pattern (A2, B2, E3) in pattern 3 (A2, B2, E3).
  • the frequency rises and falls while maintaining the difference in pitch, so it is not confused with the chord pattern of other car models. Absent.
  • the simulated traveling sound is emitted from the front of the host vehicle so that the frequency increases stepwise with the simulated traveling sound pattern corresponding to the vehicle type of the host vehicle.
  • a simulated running sound is emitted so that the frequency gradually decreases in a simulated running sound pattern corresponding to the vehicle type of the host vehicle.
  • the sound generator according to the present invention generates a simulated running sound that makes it easy for a pedestrian to recognize the approaching or leaving of the vehicle, and is therefore suitable for a sound generating device that generates a simulated running sound of a low-noise vehicle, particularly an electric vehicle. It is.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • General Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

La présente invention se rapporte à une unité de commande (15) qui provoque la sortie d'un son de roulement simulé, dont la fréquence augmente progressivement, depuis un haut-parleur (18a) disposé sur un véhicule dans une direction dans laquelle le véhicule se déplace, et qui provoque la sortie d'un son de roulement simulé, dont la fréquence diminue progressivement, depuis un haut-parleur (18b) disposé sur le véhicule dans une direction opposée à la direction de déplacement du véhicule.
PCT/JP2011/000196 2011-01-17 2011-01-17 Dispositif de production de son WO2012098570A1 (fr)

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Cited By (3)

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FR3013884A1 (fr) * 2013-11-28 2015-05-29 Peugeot Citroen Automobiles Sa Dispositif de generation d'un signal sonore representatif de la dynamique d'un vehicule et induisant une illusion auditive
WO2016180409A1 (fr) * 2015-05-11 2016-11-17 Synotec Psychoinformatik Gmbh Indicateur de vitesse sonore pour deux-roues
CN110520323A (zh) * 2017-08-01 2019-11-29 宝马股份公司 用于控制车辆音频系统的方法、装置、移动用户设备和计算机程序

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KR20180069147A (ko) * 2016-12-14 2018-06-25 만도헬라일렉트로닉스(주) 차량의 보행자 경고장치

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JP2005333573A (ja) * 2004-05-21 2005-12-02 Mitsubishi Electric Corp 警笛装置
JP2007237831A (ja) * 2006-03-07 2007-09-20 Nissan Motor Co Ltd 車外警報装置および車両警報方法
JP2008120283A (ja) * 2006-11-14 2008-05-29 Yamaha Corp 報知装置

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Publication number Priority date Publication date Assignee Title
JP2005333573A (ja) * 2004-05-21 2005-12-02 Mitsubishi Electric Corp 警笛装置
JP2007237831A (ja) * 2006-03-07 2007-09-20 Nissan Motor Co Ltd 車外警報装置および車両警報方法
JP2008120283A (ja) * 2006-11-14 2008-05-29 Yamaha Corp 報知装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3013884A1 (fr) * 2013-11-28 2015-05-29 Peugeot Citroen Automobiles Sa Dispositif de generation d'un signal sonore representatif de la dynamique d'un vehicule et induisant une illusion auditive
WO2015079149A1 (fr) * 2013-11-28 2015-06-04 Peugeot Citroen Automobiles Sa Dispositif de génération d'un signal sonore représentatif de la dynamique d'un véhicule et induisant une illusion auditive
WO2016180409A1 (fr) * 2015-05-11 2016-11-17 Synotec Psychoinformatik Gmbh Indicateur de vitesse sonore pour deux-roues
CN110520323A (zh) * 2017-08-01 2019-11-29 宝马股份公司 用于控制车辆音频系统的方法、装置、移动用户设备和计算机程序

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