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WO2013035167A1 - Dispositif d'alerte de véhicule en approche, et corps mobile électrique le comportant - Google Patents

Dispositif d'alerte de véhicule en approche, et corps mobile électrique le comportant Download PDF

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Publication number
WO2013035167A1
WO2013035167A1 PCT/JP2011/070342 JP2011070342W WO2013035167A1 WO 2013035167 A1 WO2013035167 A1 WO 2013035167A1 JP 2011070342 W JP2011070342 W JP 2011070342W WO 2013035167 A1 WO2013035167 A1 WO 2013035167A1
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WIPO (PCT)
Prior art keywords
conversion rate
vehicle
unit
pitch
volume
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PCT/JP2011/070342
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English (en)
Japanese (ja)
Inventor
貴久 青柳
朝子 表
哲司 羽下
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三菱電機株式会社
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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 PCT/JP2011/070342 priority Critical patent/WO2013035167A1/fr
Publication of WO2013035167A1 publication Critical patent/WO2013035167A1/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

Definitions

  • the present invention relates to a vehicle approach notification sound device for generating a sound and notifying a pedestrian or the like of the presence of a highly silent electric vehicle such as a hybrid vehicle or an electric vehicle.
  • Gasoline vehicles, diesel vehicles, motorcycles, etc. that use conventional internal combustion engines as power sources (hereinafter referred to as ⁇ conventional vehicles, etc. '') emit engine sounds and exhaust sounds emitted by the power sources themselves, as well as roads that are running. Since noise or the like is generated, a pedestrian walking in the city or a person riding a bicycle can recognize the approach of the vehicle by the engine sound or exhaust sound of the automobile.
  • the driving mode is driven mainly by the electric motor, not by the engine, so no engine noise or exhaust noise is generated, and in the case of electric vehicles, fuel cell vehicles, etc. Since the vehicle is driven by an electric motor in the entire operation region, all automobiles are very quiet electric vehicles.
  • Patent Document 1 includes a function unit that converts information superimposed on an approach warning sound in addition to an approach warning sound into an acoustic signal, and a modulation unit that generates an audio signal by superimposing the information on the approach warning sound. Yes.
  • patent document 2 it has a frequency according to the rotational speed of a motor, has a frequency according to a vehicle speed detected by a pseudo sound signal having an amplitude according to an accelerator opening, and a vehicle speed sensor, and has an accelerator opening.
  • a pseudo sound signal having an amplitude corresponding to the frequency is generated by a computer and output from a speaker via an amplifier. Whether to use a pseudo sound based on the motor speed or a pseudo sound based on the vehicle speed is selected by a switch. Further, it is described that a pseudo sound having a frequency based on the motor speed and a frequency based on the vehicle speed may be generated.
  • Patent Document 3 describes a technique for controlling an alarm sound by determining an emergency level of a brake operation based on information on an accelerator and a brake.
  • Patent Document 1 it is necessary to newly add a modulation unit such as spread spectrum modulation or FSK modulation. Further, the addition of the modulation unit requires an expensive DSP and the system becomes enormous. There is such a problem.
  • a modulation unit such as spread spectrum modulation or FSK modulation.
  • a pseudo sound having a frequency according to the motor speed and an amplitude according to the accelerator opening is generated.
  • the generated pseudo sound has the amplitude and frequency of a sine wave (sin wave). Since it is merely variable, it is not possible to generate a sound close to the sound generated by a conventional engine car in response to various vehicle conditions.
  • the alarm sound is controlled mainly based on the brake operation information, and the generated alarm sound simulates the sound of the engine vehicle such as “pee”, “key”, or voice. It ’s not a sound to play. Therefore, it is not possible to generate a sound close to the sound generated by a conventional engine car in response to various vehicle conditions.
  • the present invention has been made in order to solve the problems of the conventional vehicle approach notification device as described above, and has a simple structure, and a pedestrian or the like is more like a sound emitted by an engine car, and is an electric mobile body. It is an object of the present invention to provide a vehicle approach notification device that generates a notification sound that recognizes the presence of a vehicle and can perform voluntary danger avoidance behavior.
  • the present invention relates to vehicle information for acquiring vehicle information of an electric vehicle in a vehicle approach notification device that emits a notification sound to the outside from a sounding body provided in the electric vehicle that generates at least a part of driving force by an electric motor.
  • a notification sound control unit comprising at least one of an acquisition unit, a sound source, a pitch conversion unit that converts the pitch of the sound source at a pitch conversion rate, or a volume conversion unit that converts the volume of the sound source at a volume conversion rate;
  • the basic conversion rate extraction unit that extracts the basic conversion rate of the pitch conversion rate or the volume conversion rate based on the vehicle information other than the vehicle speed information and the vehicle speed information acquired by the vehicle information acquisition unit, and the vehicle information acquisition unit
  • the basic conversion rate extracted by the basic conversion rate extraction unit is corrected based on the vehicle speed information and vehicle information other than the vehicle speed information.
  • the pitch conversion rate or the volume conversion rate is calculated by correcting with the coefficient, and the signal of the notification sound emitted from the sounding body is converted by converting the sound source signal using the calculated pitch conversion rate or the volume conversion rate. Is to be generated.
  • the notification sound of the electric vehicle it is possible to emit a sound closer to the sound emitted by the engine vehicle in various vehicle states, so that a pedestrian or the like feels closer to the sound emitted by the engine vehicle. This makes it possible to recognize the existence of an electric vehicle and to perform voluntary danger avoidance actions.
  • FIG. 1 is a block diagram showing a configuration of a vehicle approach notification device 1 according to Embodiment 1 of the present invention.
  • the vehicle information acquisition unit 2 acquires vehicle information other than the vehicle speed and at least one vehicle speed from an in-vehicle communication line such as a CAN (Controller Area Network).
  • vehicle information other than the vehicle speed to be acquired there is typically torque, but there are various vehicle information such as accelerator opening, brake, shift position, steering, direction indicator, and wiper.
  • the basic conversion rate extraction unit 3 extracts the basic conversion rate (magnification) of the generated notification sound based on the acquired vehicle information.
  • the basic conversion rate of the pitch is extracted as the basic conversion rate.
  • the conversion rate coefficient setting unit 4 sets the conversion rate coefficient based on the vehicle information acquired by the vehicle information acquisition unit 2. Details of the basic conversion rate and the conversion rate coefficient will be described later.
  • the notification sound control unit 7 converts the pitch of the sound signal generated by the sound source 8 in the pitch conversion unit 9.
  • the sound signal generated by the sound source 8 includes, for example, a sound recorded from an engine car or a sound artificially created by a synthesizer.
  • the pitch conversion is generated by the sound source 8 by correcting the pitch basic conversion rate extracted by the basic conversion rate extraction unit 3 using the conversion rate coefficient set by the conversion rate coefficient setting unit 4 and by the corrected pitch conversion rate. This is performed by varying the temporal sampling interval of the sound signal.
  • the sound signal converted by the pitch converter 9 is amplified by the amplifier 10, and the sounding body 11 such as a speaker is driven to generate a notification sound.
  • the vehicle information acquisition unit 2 reads vehicle information such as vehicle speed, brake, shift position, accelerator opening, torque request, wiper, headlight, direction indicator, and steering at an arbitrary timing. Furthermore, the read vehicle information is converted into a format read by the conversion rate coefficient setting unit 4 and the basic conversion rate extraction unit 3 and notified to the conversion rate coefficient setting unit 4 and the basic conversion rate extraction unit 3.
  • the format notified to the conversion rate coefficient setting unit 4 and the basic conversion rate extraction unit 3 may be the vehicle information itself read from the vehicle, or may be a difference value from the previous acquired value.
  • the notification may be made at regular intervals, or only when there is a change in at least one of the vehicle information. Good.
  • Expression (1) is an example expression for calculating a pitch conversion rate Pitch for finally converting a pitch.
  • Pitch (v, a1, a2 ,,, an) k0 * P (v) + k1 * P (a1) + k2 * P (a2) +... + kn * P (an) .
  • the vehicle information acquisition unit 2 reads the vehicle speed and torque request signals every certain period, for example, every second.
  • the basic conversion rate extracting unit 3 the relationship between the vehicle speed v and the basic pitch conversion rate P (v) as shown in FIG. 2 as an example, and the basic request rate of the torque request signal and pitch as shown in FIG. 3 as an example.
  • the relationship with P (a1) is stored in a table format, for example.
  • the basic conversion rate extraction unit 3 extracts values of P (v) and P (a1), which are basic conversion rates of the pitch, based on the vehicle speed and torque request signals read by the vehicle information acquisition unit 2.
  • the conversion rate coefficient setting unit 4 sets k0 and k1, which are pitch conversion rate coefficients, based on the vehicle speed and torque request signals read by the vehicle information acquisition unit 2.
  • k0 and k1 may be set in proportion.
  • the pitch converting unit 9 obtains the value of Pitch (v, a1) by the equation (1), and the sound source 8 is obtained by the obtained Pitch (v, a1). Convert the pitch of the signal. For example, when the driver further steps on the accelerator when the driver needs further acceleration on an uphill or the like, the torque request signal value increases in order to increase the torque in the vehicle according to the accelerator information. As the torque request signal value increases, the pitch changes according to the equation (1). Next, the vehicle increases the torque according to the torque request signal, and as a result, the vehicle speed increases. As a result, the pitch changes according to the equation (1) as the speed increases. In this way, it is possible to change the pitch according to the torque request signal before the vehicle speed changes, and it is possible to immediately respond to changes in vehicle information.
  • the torque request signal is used as vehicle information other than the vehicle speed, but the vehicle information other than the vehicle speed includes brake, shift position, accelerator opening, wiper, headlight, direction indicator, steak, etc.
  • vehicle information other than the vehicle speed includes brake, shift position, accelerator opening, wiper, headlight, direction indicator, steak, etc.
  • a signal indicating whether the engine is driven or an electric motor may be used, and a polynomial having a plurality of vehicle information other than the vehicle speed may be used.
  • the pitch of the sound source is converted at the conversion rate according to the state of the vehicle using the basic conversion rate and conversion rate coefficient stored in advance. Therefore, it is possible to generate a notification sound close to the sound generated by the engine car corresponding to the state of the vehicle with a simple configuration. Further, if the torque request or the accelerator opening information is used as vehicle information other than the vehicle speed, the notification sound can be changed by predicting the driver's operation or intention before the vehicle speed changes.
  • FIG. FIG. 4 is a block diagram showing the configuration of the vehicle approach notification device 1 according to Embodiment 2 of the present invention. 4, the same reference numerals as those in FIG. 1 denote the same or corresponding parts.
  • the configuration of the vehicle approach notification device 1 according to the second embodiment is a configuration in which the pitch conversion unit 9 of the configuration of the vehicle approach notification device 1 according to the first embodiment shown in FIG. Yes.
  • the volume conversion unit 12 converts the volume (amplitude) of the signal of the sound source 8 according to the volume conversion rate Volume obtained by the following equation (2).
  • the operation of the vehicle approach notification device 1 according to the second embodiment is basically the same as the operation of the vehicle approach notification device 1 according to the first embodiment.
  • the vehicle information acquisition unit 2 reads the vehicle speed and torque request signals every certain period, for example, every second.
  • the basic conversion rate extraction unit 3 stores the relationship between the vehicle speed v and the basic volume conversion rate V (v) and the relationship between the torque request signal and the basic volume conversion rate V (a1) in a table format, for example.
  • the basic conversion rate extraction unit 3 extracts the values of V (v) and V (a1) that are the basic conversion rates of the volume based on the vehicle speed and torque request signal read by the vehicle information acquisition unit 2.
  • the conversion rate coefficient setting unit 4 sets the volume conversion rate coefficients w0 and w1 based on the vehicle speed and torque request signals read by the vehicle information acquisition unit 2.
  • the volume conversion unit 12 obtains the value of VolumeVol (v, a1) by Expression (2), and the sound source 8 is obtained from the obtained Volume (v, a1). Convert the volume of the signal.
  • the accelerator is further stepped on.
  • the torque request signal value increases in order to increase the torque in the vehicle according to the accelerator information.
  • the volume changes according to equation (2).
  • the vehicle increases the torque according to the torque request signal, and as a result, the vehicle speed increases.
  • the volume changes according to the equation (2) as the speed increases. In this way, it is possible to change the volume according to the torque request signal before the vehicle speed changes, and it is possible to immediately respond to changes in vehicle information.
  • the vehicle information other than the vehicle speed information includes the brake, shift position, accelerator opening, wiper, headlight, direction indicator, steer.
  • a signal such as a link may be used.
  • a signal indicating whether the engine is driven or an electric motor may be used, or a polynomial having a plurality of vehicle information other than the vehicle speed information may be used. .
  • the basic conversion rate and the conversion rate coefficient stored in advance are used to change the conversion rate according to the vehicle state. Since the volume of the sound source is converted, a notification sound close to the sound generated by the engine car corresponding to the state of the vehicle can be generated with a simple configuration. In addition, since the volume can be changed, if the volume is increased in accordance with the degree of danger, the cognition can be improved. Furthermore, if information on the torque request or the accelerator opening is used as vehicle information other than the vehicle speed, the notification sound can be changed by predicting the driver's operation or intention before the vehicle speed changes.
  • FIG. FIG. 5 is a block diagram showing a configuration of the vehicle approach notification device 1 according to Embodiment 3 of the present invention. 5, the same reference numerals as those in FIGS. 1 and 4 denote the same or corresponding parts.
  • the vehicle approach notification device 1 according to the third embodiment includes both the pitch conversion unit 9 described in the first embodiment and the volume conversion unit 12 described in the second embodiment.
  • the basic conversion rate extraction unit 3 the basic conversion rate P (v), P (a1) to P (an) of the pitch, and the basic conversion rate V (v) of the volume based on the vehicle speed and vehicle information other than the vehicle speed. , V (a1) to V (an) are extracted.
  • the conversion rate coefficient setting unit 4 sets the pitch conversion rate coefficients k0 to kn and the volume conversion rate coefficients w0 to wn based on the vehicle speed and vehicle information other than the vehicle speed. Using the above values, the pitch conversion unit 9 converts the pitch of the sound signal from the sound source 8 according to Equation (1), and the volume conversion unit 12 adjusts the volume of the sound signal from the sound source 8 according to Equation (2). Convert.
  • pitch conversion and volume conversion may be performed according to Equation (6).
  • Pitch (v, a1, a2 ,,, an) (k1 (a1) + k2 (a2) +... + kn (an)) * P (v) (5)
  • Volume (v, a1, a2 ,, an) (w1 (a1) + w2 (a2) +... + wn (an)) * V (v) (6) here, P (v): Basic
  • the conversion rate coefficients (k0 to kn, w0 to wn, and k1 (a1) to kn (an), w1 (a1) in the expressions (1), (2), and (3) to (6) ⁇ wn (an)) may be fixed values or variable values according to conditions. For example, when using a wiper signal, it is assumed that the wiper is used in rainy weather, and the background noise increases due to rain, so the conversion rate coefficient can be set according to the wiper signal level (fast, slow, etc.). It may be increased or decreased.
  • the conversion rate coefficient may be changed between a case where the vehicle speed is higher than the reference vehicle speed and a case where the vehicle speed is lower than the reference vehicle speed. For example, the conversion rate coefficient may be increased when the vehicle speed is 20 km / h or less, and the conversion rate coefficient may be decreased when the vehicle speed exceeds 20 km / h. Further, in a hybrid vehicle, the conversion rate coefficient may be changed between an engine drive and an electric motor drive.
  • P (v) and V (v) that is, the basic conversion rate, as shown in FIG. 7, there is a portion in which the value is different in the increasing direction and decreasing direction of the vehicle speed v, so-called hysteresis basic conversion rate. It is also good.
  • the basic conversion rates P (a1) and V (a1) using the torque request signal described in the first to third embodiments as parameters are also used as the basic conversion rates having the characteristics shown in FIG. good.
  • the pitch and volume of the sound source are converted at the conversion rate according to the state of the vehicle using the basic conversion rate and conversion rate coefficient stored in advance. As a result, it is possible to generate a notification sound closer to the sound generated by the engine car corresponding to the state of the vehicle with a simple configuration. Further, since the pitch and volume are changed, it is possible to generate a notification sound that is closer to the sound generated by the engine car than in the first and second embodiments. Further, if information on the torque request or the accelerator opening is used as the upper part of the vehicle other than the vehicle speed, the notification sound can be changed by predicting the driver's operation or intention before the vehicle speed changes.
  • FIG. 9 is a block diagram showing a configuration of the vehicle approach notification device 1 according to Embodiment 4 of the present invention. 9, the same reference numerals as those in FIG. 5 denote the same or corresponding parts.
  • the vehicle approach notification device 1 according to the fourth embodiment includes a vehicle information differential value calculation unit 20 that calculates a differential value of vehicle information.
  • the differential value of the vehicle information that is, the amount of change per unit time is expressed as ⁇ an.
  • the differential value of the vehicle information is used as the vehicle information other than the vehicle speed, and the pitch conversion unit 9 and the volume conversion unit 12 perform the pitch conversion according to the following equations (7) and (8). Perform volume conversion.
  • Pitch (v, ⁇ a1, ⁇ a2,, ⁇ an) k0 * P (v) + k1 * P ( ⁇ a1) + k2 * P ( ⁇ a2) +... + kn * P ( ⁇ an) (7)
  • Volume (v, ⁇ a1, ⁇ a2 ,,, ⁇ an) w0 * V (v) + w1 * V ( ⁇ a1) + w2 * V ( ⁇ a2) +... + wn * V ( ⁇ an) (8) here,
  • FIG. 10 is an example of a graph showing a change in the value of the basic conversion rate P ( ⁇ an) or V ( ⁇ an). If the driver further decelerates the accelerator than the currently depressed accelerator state, the torque request signal value increases in order to increase the torque in the vehicle according to the accelerator opening information. Next, the vehicle increases the torque according to the torque request signal, and as a result, the vehicle speed increases.
  • the vehicle approach notification device in order to change the basic conversion rate of the pitch and the basic conversion rate of the volume according to the differential value of the torque request signal before the vehicle speed change (that is, the amount of change in the torque request signal), It becomes possible to immediately respond to changes in vehicle information.
  • vehicle information other than vehicle speed information is used as a torque request signal, but vehicle information other than vehicle speed information includes signals such as brake, shift position, accelerator opening, wiper, headlight, direction indicator, steering, etc.
  • vehicle information other than vehicle speed information includes signals such as brake, shift position, accelerator opening, wiper, headlight, direction indicator, steering, etc.
  • a signal indicating whether the engine is driven or the electric motor is used may be used. Further, it may be a polynomial having a plurality of vehicle information other than the vehicle speed information.
  • the conversion rate coefficient set in the conversion rate coefficient setting unit 4 is set based on the differential value of the vehicle information as in the following formulas (9), (10), formulas (11), and (12). Also good.
  • Pitch (v, ⁇ a1, ⁇ a2,, ⁇ an) (k1 ( ⁇ a1) * k2 ( ⁇ a2) *... * kn ( ⁇ an)) * P (v) .
  • the conversion rate coefficients (k0 to kn, w0 to wn, and k1 ( ⁇ a1) to kn ( ⁇ an), w1 ( ⁇ a1) to wn ( ⁇ an)) of each term in the equations (7) to (12) are fixed. It is good also as a value, and it is good also as a variable value according to conditions. For example, when using a wiper signal, it is assumed that the wiper is used in rainy weather, and the background noise may increase due to rain, so conversion of each equation according to the wiper signal level (fast, slow, etc.) The rate coefficient may be increased or decreased.
  • the conversion rate coefficient may be varied between the case where the vehicle speed is higher than the reference vehicle speed and the case where the vehicle speed is lower than the reference vehicle speed. For example, the conversion rate coefficient may be increased when the vehicle speed is 20 km / h or less, and the coefficient may be decreased when the vehicle speed exceeds 20 km / h. Further, in the hybrid vehicle, the conversion rate coefficient may be varied depending on whether the engine is driven or the electric motor is driven.
  • the vehicle information other than the vehicle speed is obtained by the equations (7) and (8), the equations (9), (10), the equations (11), (12), or the like.
  • a term with the differential value of as a variable parameter was added. This makes it possible to control the pitch and volume of the notification sound according to vehicle information other than the vehicle speed.
  • the basic conversion rate and the conversion rate coefficient stored in advance are used to respond to changes in vehicle information, particularly vehicle information other than vehicle speed. Since the pitch and volume of the sound source are converted according to the conversion rate, a notification sound close to the sound generated by the engine car corresponding to the state of the vehicle can be generated with a simple configuration. In addition, since the pitch and volume are converted based on the amount of change in vehicle information other than the vehicle speed, it is possible to change the notification sound by predicting the driver's operation or intention before the vehicle speed changes. it can. Furthermore, if information on the torque request or the amount of change in the accelerator opening is used as vehicle information other than the vehicle speed, the notification sound can be changed by predicting the driver's operation or intention in a more predictive manner.
  • FIG. 5 the conversion rate coefficient set by the conversion rate coefficient setting unit 4 in the vehicle approach notification device 1 shown in FIG. 1, FIG. 4, FIG. 5 and FIG.
  • (14) Formula (15), Formula (16), Formula (17), Formula (18), Formula (19), and Formula (20), 2 of vehicle information other than the vehicle speed and the vehicle speed. It is characterized by setting with two parameters.
  • FIGS. 14 and 15 are graphs showing an example of changes in the conversion rate coefficient (k1 (v, a1) or w1 (v, an)) when vehicle information other than vehicle speed is the torque request signal a1. Show. Further, the characteristics of the conversion rate coefficient (kn (v, an) or wn (v, an)) may be a characteristic having hysteresis.
  • the conversion rate coefficient is provided with a term in which both the vehicle speed and the vehicle information other than the vehicle speed or the differential value of the vehicle information other than the vehicle speed are variable parameters. It is possible to control the pitch and volume according to vehicle information other than the vehicle speed and the vehicle speed. Furthermore, since both the vehicle speed and the vehicle information other than the vehicle speed or the differential value of the vehicle information other than the vehicle speed are included in the parameters, more detailed control of the pitch and volume becomes possible, and the engine vehicle corresponding to the vehicle state A notification sound closer to the generated sound can be generated. Further, the notification sound can be changed by predicting the driver's operation or intention before the vehicle speed changes.
  • Embodiment 6 the following formulas (21) and (22) are used in the pitch conversion unit 9 and the volume conversion unit 12 in the vehicle approach notification device 1 shown in FIGS. Also, pitch conversion and volume conversion are performed based on equations such as Equation (23) and Equation (24). That is, pitch conversion and volume conversion are performed by multiplying the pitch conversion rate Pitch and volume conversion rate Volume obtained according to the equations described in Embodiments 1 to 5 above by the coefficient ⁇ (t) with the time axis as a parameter. It is a feature.
  • ⁇ (t) An example of the function of ⁇ (t) is shown in FIG.
  • control over time can be performed like fade-in and fade-out.
  • control at times such as daytime and midnight becomes possible.
  • the time here may be the current time or may be an elapsed time from an arbitrary timing.
  • the filter is obtained by taking the product sum with the past values of the pitch conversion rate and the volume conversion rate as shown in the equations (25), (26), (27), and (28). Processing may be performed. At this time, M is the number of taps of the filter.
  • the equation may be an FIR (Finite impulse response) filter format such as Equation (25), Equation (26), Equation (27), or Equation (28), or an IIR (Infinite impulse response) filter format.
  • FIR Finite impulse response
  • IIR Infinite impulse response
  • the unit 3 and the conversion rate coefficient setting unit 4 may have a mathematical expression or table data.
  • FIG. FIG. 19 is a block diagram showing a configuration of the vehicle approach notification device 1 according to the seventh embodiment of the present invention.
  • the conversion rate coefficient set by the conversion rate coefficient setting unit 4 in FIG. 9, that is, the conversion rate coefficient setting unit 4 in FIG. 9 is the conversion rate coefficient set by the equations (1) and (2). Is an embodiment for explaining a specific example in which each vehicle information is set based on a differential value, that is, a change amount.
  • the operation of the conversion rate coefficient setting unit 4 is as follows.
  • the conversion rate mode determination unit 40 selects and determines the conversion rate mode mainly based on the differential value, that is, the change amount of the vehicle information acquired by the vehicle information acquisition unit 2. Details of the conversion rate mode will be described later.
  • the conversion rate coefficient determination unit 42 reads a conversion rate coefficient suitable for the conversion rate mode determined by the conversion rate mode determination unit 40 from the conversion rate coefficient stored in the conversion rate coefficient storage unit 41 and determines the conversion rate coefficient. To do.
  • the basic conversion rate extraction unit 3 extracts each basic conversion rate based on the value of each vehicle information.
  • the pitch conversion unit 9 and the volume conversion unit 12 correct the pitch conversion rate and the volume conversion rate extracted by the basic conversion rate extraction unit 3 using the conversion rate coefficient determined by the conversion rate coefficient determination unit 42. Further, the pitch conversion unit 9 and the volume conversion unit 12 perform pitch conversion and volume conversion by correcting the sound signal of the sound source 8 based on the corrected pitch conversion rate and volume conversion rate.
  • the pitch conversion unit and the volume-converted sound signal are amplified by an amplifier 10 and a sounding body 11 such as a speaker is driven to generate a notification sound.
  • FIG. 20 The above operation flow is shown in FIG. 20 as a flowchart.
  • the vehicle information sent from the vehicle information acquisition unit 2 is information on the torque request and the accelerator opening, in addition to the vehicle speed, and uses a brake signal as an auxiliary.
  • the pitch conversion rate coefficient corresponding to the vehicle speed is ksp
  • the volume conversion rate coefficient is wsp
  • the pitch conversion rate coefficient corresponding to the torque request is ktrq
  • the volume conversion rate coefficient is wtrq
  • the accelerator opening is supported.
  • the pitch conversion rate coefficient is kacc
  • the volume conversion rate coefficient is wacc.
  • the basic conversion rate stored in the basic conversion rate extraction unit 3 is Psp (sp), the basic conversion rate of the pitch corresponding to the vehicle speed, Vsp (sp), and the basic conversion rate of the pitch corresponding to the torque request.
  • Each basic conversion rate Psp (sp), Ptrq (trq), Pacc (acc), Vsp (sp), Vtrq (trq), Vacc (acc) is converted into a table format as each conversion rate table in the basic conversion rate extraction unit 3. It shall be remembered. First, the vehicle speed, torque request, and instantaneous value of the accelerator opening acquired by the vehicle information acquisition unit 2 are read by the basic conversion rate extraction unit 3 at predetermined intervals of X seconds. The basic conversion rate value corresponding to the instantaneous value is read from each stored conversion rate table, and is output to the pitch conversion unit 9 and the volume conversion unit 12.
  • the vehicle information differential value calculation unit 20 acquires the vehicle speed, torque request, and instantaneous value of the accelerator opening acquired by the vehicle information acquisition unit 2 for a predetermined period (Y seconds), and calculates the average value.
  • the time Y seconds acquired by the vehicle information differential value calculation unit 20 is set to be longer than the period X seconds for reading the vehicle information by the basic conversion rate extraction unit 3.
  • X seconds are 10 ms to 100 ms
  • Y seconds are 100 ms to 5000 ms.
  • the difference between the calculated average value and the average value of the immediately preceding predetermined period is calculated. This difference corresponds to a change amount of each vehicle information, that is, a differential value. This change amount information is input to the conversion rate mode determination unit 40.
  • the conversion rate mode determination unit 40 stores a conversion rate mode table as shown in FIG.
  • the conversion rate mode determination unit 40 determines the current conversion rate mode with reference to the conversion rate mode of FIG. 20 from the information on the amount of change in each vehicle information that is input information, and determines the determined conversion rate mode. It outputs to the conversion rate coefficient determination part 42.
  • the conversion rate coefficient storage unit 41 stores each conversion rate coefficient in each conversion rate mode as shown in FIG.
  • the conversion rate coefficient determination unit 42 reads out the values of the conversion rate coefficients corresponding to the input conversion rate mode, and outputs them to the pitch conversion unit 9 and the volume conversion unit 12.
  • the pitch conversion unit 9 and the volume conversion unit 12 use each basic conversion rate value sent from the basic conversion rate extraction unit 3 and each conversion rate coefficient value sent from the conversion rate coefficient determination unit 42. Then, the pitch conversion rate and the volume conversion rate are calculated by the equations (29) and (30). Using the calculated pitch conversion rate and volume conversion rate, pitch conversion and volume conversion are performed on the sound signal generated by the sound source 8.
  • the vehicle state is classified into a plurality of conversion rate modes in advance using information other than the vehicle speed and the vehicle speed, and information on their differential values (variations).
  • a conversion rate coefficient is given for each conversion rate mode.
  • the current conversion rate mode is determined from the current vehicle state, and the notification sound is controlled using the conversion rate coefficient corresponding to the determined conversion rate mode.
  • the notification sound corresponding to the state of the vehicle can be generated with a very simple configuration, and a notification sound with a feeling closer to the engine sound can be obtained.
  • the notification sound can be changed in response to a change in the vehicle information immediately. In particular, if the mode is determined according to the amount of change in torque request and accelerator position information, the notification sound can be changed by predicting the driver's operation or intention before the vehicle speed changes. .
  • FIG. 23 is a block diagram showing a configuration of the vehicle approach notification device 1 according to the eighth embodiment of the present invention.
  • the sound source 8 includes a plurality of different sound sources.
  • FIG. 23 shows a case where two sound sources, a sound source A81 and a sound source B82, are provided as an example.
  • the pitch and volume of the sound signal generated from the sound source A81 are converted by the pitch converter A91 and the volume converter A121.
  • the pitch and volume of the sound signal generated from the sound source B82 are converted by the pitch converter B92 and the volume converter B122.
  • the two sound signals thus converted are synthesized by the synthesizing unit 13, and the synthesized sound signal is amplified by the amplifier 10, and the sound generator 11 is notified by driving the sound generator with the amplified sound signal. A sound is generated.
  • the pitch and volume conversion methods when the pitch conversion unit A91 and the volume conversion unit A121 perform conversion may be any of the pitch conversion and volume conversion methods described in the first to seventh embodiments. . Also, any conversion method may be used as the conversion method in the pitch conversion unit B92 and the volume conversion unit B122.
  • the basic conversion rate and conversion rate coefficient of the pitch used in the pitch conversion unit A91 do not need to be the same as the basic conversion rate and conversion rate coefficient of the pitch used in the pitch conversion unit B92, and are appropriate for the signal of each sound source. What is necessary is just to set a basic conversion rate and a conversion rate coefficient. The same applies to the basic volume conversion rate and the conversion rate coefficient.
  • the signal of the sound source B82 may not be converted, but may be directly sent to the synthesis unit 13 to be synthesized with the converted signal of the sound source A81. That is, a pitch conversion unit or a volume conversion unit that converts at least one of the sound source signals may be provided.
  • the vehicle approach notification device includes a plurality of sound sources, and performs pitch conversion and volume conversion with an appropriate basic conversion rate and conversion rate coefficient for a signal of at least one sound source, It was made to synthesize a signal of multiple sounds to make a signal of a notification sound.
  • a low speed and a high speed may be provided as sound sources, and the ratio may be adjusted so that the low speed can be heard when the vehicle speed is low, and the high speed is heard when the vehicle speed is high.
  • the sound source may be provided for vehicle speed and torque, and the ratio may be adjusted so that it can be heard more when the vehicle speed changes, and when the torque changes when the torque changes. Can be heard.
  • Vehicle approach notification device 2 Vehicle information acquisition unit 3: Basic conversion rate extraction unit 4: Conversion rate coefficient setting unit 5: Conversion rate coefficient determination unit 7: Notification sound control unit 8: Sound source 9: Pitch conversion unit 11: Sound generation Field 12: Volume conversion unit 13: Composition unit 40: Conversion rate mode determination unit 41: Conversion rate coefficient storage unit 42: Conversion rate coefficient determination unit 100: In-vehicle communication line

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

Abstract

La présente invention vise à procurer un appareil d'alerte de véhicule en approche, lequel appareil émet un son d'alerte pour permettre à un piéton, et analogue, de remarquer la présence d'un corps mobile électrique avec les sens comme si le son venait dans une voiture à moteur et d'effectuer une action d'évitement de danger volontaire. L'appareil comporte : une unité de commande de son d'alerte (7) comprenant une unité de conversion (9) qui convertit la hauteur ou le volume d'une source de son (8) par un taux de conversion ; une unité d'extraction de taux de conversion de base (3) qui extrait un taux de conversion de base sur la base d'une vitesse de véhicule et d'une information de véhicule autre que la vitesse de véhicule ; et une unité d'établissement de coefficient de taux de conversion (4) qui établit un coefficient de taux de conversion pour corriger le taux de conversion de base sur la base de la vitesse de véhicule et de l'information de véhicule autre que la vitesse de véhicule. L'unité de conversion calcule un taux de conversion par correction du taux de conversion de base extrait par l'unité d'extraction de taux de conversion de base en fonction du coefficient de taux de conversion établi par l'unité d'établissement de coefficient de taux de conversion, et génère un signal pour le son d'alerte émis par un émetteur de son par conversion d'un signal de source de son à l'aide du taux de conversion calculé.
PCT/JP2011/070342 2011-09-07 2011-09-07 Dispositif d'alerte de véhicule en approche, et corps mobile électrique le comportant WO2013035167A1 (fr)

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PCT/JP2011/070342 WO2013035167A1 (fr) 2011-09-07 2011-09-07 Dispositif d'alerte de véhicule en approche, et corps mobile électrique le comportant

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Cited By (6)

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Publication number Priority date Publication date Assignee Title
WO2014162513A1 (fr) * 2013-04-02 2014-10-09 パイオニア株式会社 Dispositif acoustique et procédé de commande de son émis
WO2014184827A1 (fr) * 2013-05-16 2014-11-20 アンデン株式会社 Dispositif de notification d'approche de vehicule
WO2020089534A1 (fr) * 2018-10-30 2020-05-07 Naviboss Véhicule électrique équipé d'un générateur acoustique
EP3666592A4 (fr) * 2017-08-09 2020-06-17 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Dispositif d'alerte pour véhicules
CN114242091A (zh) * 2021-12-28 2022-03-25 厦门锐益达电子科技有限公司 汽车低速行驶警示音合成方法及装置
WO2023140009A1 (fr) * 2022-01-20 2023-07-27 パナソニックＩｐマネジメント株式会社 Dispositif de génération de pseudo-sons

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JPH0732948A (ja) * 1993-07-20 1995-02-03 Toyota Motor Corp 電気自動車用疑似走行音発生装置
JP2006264390A (ja) * 2005-03-22 2006-10-05 Yamaha Corp 車両の警報音装置

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JPH0732948A (ja) * 1993-07-20 1995-02-03 Toyota Motor Corp 電気自動車用疑似走行音発生装置
JP2006264390A (ja) * 2005-03-22 2006-10-05 Yamaha Corp 車両の警報音装置

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014162513A1 (fr) * 2013-04-02 2014-10-09 パイオニア株式会社 Dispositif acoustique et procédé de commande de son émis
WO2014184827A1 (fr) * 2013-05-16 2014-11-20 アンデン株式会社 Dispositif de notification d'approche de vehicule
CN105209296A (zh) * 2013-05-16 2015-12-30 安电株式会社 车辆接近通报装置
US9694745B2 (en) 2013-05-16 2017-07-04 Anden Co., Ltd. Vehicle approach alert device
EP3666592A4 (fr) * 2017-08-09 2020-06-17 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Dispositif d'alerte pour véhicules
WO2020089534A1 (fr) * 2018-10-30 2020-05-07 Naviboss Véhicule électrique équipé d'un générateur acoustique
CN114242091A (zh) * 2021-12-28 2022-03-25 厦门锐益达电子科技有限公司 汽车低速行驶警示音合成方法及装置
WO2023140009A1 (fr) * 2022-01-20 2023-07-27 パナソニックＩｐマネジメント株式会社 Dispositif de génération de pseudo-sons
JP2023105923A (ja) * 2022-01-20 2023-08-01 パナソニックＩｐマネジメント株式会社 疑似音生成装置
JP7741606B2 (ja) 2022-01-20 2025-09-18 パナソニックオートモーティブシステムズ株式会社 疑似音生成装置

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