WO2019053906A1 - Dispositif de notification d'approche de véhicule - Google Patents

Dispositif de notification d'approche de véhicule Download PDF

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Publication number
WO2019053906A1
WO2019053906A1 PCT/JP2017/033613 JP2017033613W WO2019053906A1 WO 2019053906 A1 WO2019053906 A1 WO 2019053906A1 JP 2017033613 W JP2017033613 W JP 2017033613W WO 2019053906 A1 WO2019053906 A1 WO 2019053906A1
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WO
WIPO (PCT)
Prior art keywords
vehicle approach
approach notification
frequency
frequency band
vehicle
Prior art date
Application number
PCT/JP2017/033613
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English (en)
Japanese (ja)
Inventor
耕一 外山
哲夫 百々
川村　寿彦
Original Assignee
株式会社今仙電機製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社今仙電機製作所 filed Critical 株式会社今仙電機製作所
Priority to PCT/JP2017/033613 priority Critical patent/WO2019053906A1/fr
Publication of WO2019053906A1 publication Critical patent/WO2019053906A1/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

Definitions

  • the present invention relates to a vehicle approach notification device, and more particularly to a vehicle approach notification device capable of favorably recognizing a vehicle approach notification sound that is a small sound compared to an alarm sound.
  • an electromagnetic horn that emits an alarm sound makes a vehicle approach notification sound that simulates an engine sound, etc., and a single electromagnetic horn causes an alarm sound as well as a vehicle approach notification to a pedestrian. I want to do it.
  • the frequency of the notification sound is limited to the low frequency range of 80 Hz to 300 Hz.
  • adults with normal hearing are known to have good sensitivity in the high frequency range of 2 KHz-5 KHz.
  • the present invention solves such problems, and provides a vehicle approach notification device capable of emitting a vehicle approach notification sound in a high frequency range in addition to a vehicle approach notification sound in a low frequency range with a compact structure.
  • the purpose is
  • a single piezoelectric element sounding body (3) having a first resonant frequency (f1) and a second resonant frequency (f2) on the low frequency side and the high frequency side, respectively And a vehicle approach notification signal (1a) in a frequency band including the first resonance frequency (f1) and the second resonance frequency (f2), and the vehicle approach notification signal (1a) is transmitted to the piezoelectric element And output means (13, 14) for outputting to the sound generator (3).
  • a single piezoelectric element sounding body having a resonant frequency on the low frequency side and the high frequency side is used, and a vehicle approach notification signal of a frequency band including the respective resonant frequencies is input to the piezoelectric element.
  • a vehicle approach notification signal of a frequency band including the respective resonant frequencies is input to the piezoelectric element.
  • the vehicle further comprises alarm signal generating means (12) for generating an alarm signal (12a) when the alarm means (15) is operated, and the output means (13, 14) is the vehicle approach notification signal
  • the alarm signal (12a) is set to be output to the piezoelectric element sounding body (3).
  • the vehicle approach notification sound and the alarm sound can be output by a single piezoelectric element sounding body, a vehicle approach notification device that can be used also as a horn can be realized more compactly.
  • the second low frequency band further includes the first resonance frequency (f1) of the vehicle approach notification signal (1a) at the front stage of the output means (13, 14). Adjusting the vehicle approach notification signal (1a) to a predetermined magnitude in a narrower high frequency side frequency band including the resonance frequency (f2) of the second frequency band, and a frequency band between the low frequency side frequency band and the high frequency side frequency band There is further provided gain adjustment means (11) for reducing the vehicle approach notification signal (1a) to a low level.
  • the piezoelectric element sounding body operates efficiently at the first and second resonance frequencies, and vehicle approaching notification sounds in the low frequency range and the high frequency range are efficiently output.
  • the vehicle approach notification signal is suppressed to a small level, so that the environmental noise is prevented from being deteriorated.
  • the gain adjustment means (11) further transmits the vehicle approach notification signal in a frequency band lower than the low frequency band and in a frequency band higher than the high frequency band. It is set to keep (1a) small.
  • the vehicle approach notification signal (1a) can be suppressed to a small value also in the frequency band lower than the low frequency band and in the frequency band higher than the high frequency band. Noise deterioration can be suppressed more effectively.
  • the first resonance frequency (f1) is set between 500 Hz and 800 Hz
  • the second resonance frequency (f2) is set between 2 kHz and 5 kHz.
  • the approach of the vehicle can be reliably warned from an adult with normal hearing to an old person with impaired hearing.
  • the vehicle approach notification sound in the high frequency range can also be output with a compact structure.
  • FIG. 1 the block block diagram of the electric circuit (warning circuit) of the vehicle approach notification device of this invention is shown.
  • the alarm circuit 1 receives a gain adjustment circuit 11 as a gain adjustment means, an alarm signal generation circuit 12, an amplifier circuit 13 to which the output signals 11a and 12a of these circuits 11 and 12 are input, and an output signal of the amplifier circuit 13 It comprises the boosting drive circuit 14.
  • the amplifier circuit 13 and the boost drive circuit 14 constitute an output means.
  • a vehicle approach notification signal 1a is input to the gain adjustment circuit 11 from an external computer.
  • the vehicle approach notification signal 1a is a signal of, for example, a motor pseudo sound or an engine pseudo sound in a wide frequency band, and is output from the external computer to the gain adjustment circuit 11 under the condition that the vehicle travels quietly at low speed.
  • the gain adjustment circuit 11 is set to adjust only the band of 500 Hz to 800 Hz and the band of 2 KHz to 5 KHz in the vehicle approach notification signal inputted thereto to a predetermined size, and to suppress the other inputs to a small value. There is.
  • an alarm signal 12a is generated and output from the alarm signal generation circuit 12.
  • An example of the alarm signal 12a is shown in FIG.
  • the waveform of the alarm signal 12a is a rectangular wave, which is an area X1 of 3600 Hz and an area Y1 of 2800 Hz which is raised by 400 Hz above and below the frequency 3200 Hz of the first basic rectangular wave, and a frequency of 2800 Hz of the second basic rectangular wave.
  • the output signal 11a of the gain adjustment circuit 11 and the alarm signal 12a generated by the alarm signal generation circuit 12 are input to the amplifier circuit 13, amplified to a predetermined level, and input to the boost drive circuit 14.
  • the boosting drive circuit 14 boosts each of the signals 11a and 12a to a voltage necessary for driving the piezoelectric element sounding body 3 whose structure is described below, which is connected to the circuit 14, for vehicle approach notification. It is outputted to the piezoelectric element sounding body 3 as a drive signal and a drive signal for alarm.
  • the structure of a horn (vehicle approach notification device) main body provided with the piezoelectric element sounding body 3 is shown in FIG.
  • the horn body is provided with a circular open container-like metal plate housing 4, and a mounting stay 41 is bolted to the center of the bottom wall of the housing 4.
  • An open container-like resin holder 42 is inserted in the housing 4 along the same, and a circuit board 5 provided with the above-mentioned horn circuit 1 is disposed on the bottom wall of the holder 42 in parallel thereto. It is set up.
  • the circuit board 5 is fitted in and supported by a pin portion 421 erected on the bottom wall of the holder 42.
  • the circuit components and the like of the alarm circuit 1 are not shown.
  • the metal diaphragm plate 31 which constitutes the piezoelectric element sounding body 3 together with the piezoelectric body 32 described below is stretched in parallel with the circuit board 5 by closing the opening of the holder 42, and the diaphragm plate 31 has its outer peripheral edge Is held between the opening edge of the holder 42 and the outer peripheral edge of the resin resonator 43 attached to the opening of the holder 42.
  • sound output ports 431 are provided at a plurality of locations on the outer peripheral portion (four locations at equal intervals in the circumferential direction in the present embodiment).
  • a circular piezoelectric body 32 is attached to the center of the back surface (the lower surface in FIG. 3) of the diaphragm plate 31.
  • the piezoelectric body 32 has a first resonance in a low frequency band of 500 Hz to 800 Hz. It has a frequency f1 and has a second resonance frequency f2 in a high frequency side band of 2 KHz to 5 KHz.
  • Output lines 33 and 34 respectively extend from the circuit board 5 to one electrode (not shown) of the piezoelectric body 32 and the diaphragm plate 31 leading to the other electrode (not shown) of the piezoelectric body 32.
  • one end of a power supply connector 51 extending to the outside of the housing 4 is connected to one end of the circuit board 5.
  • the outside of the resonator 43 is covered with a metal cover 6 in which a long hole shaped sound emission port 61 is formed.
  • the piezoelectric element sounding body 3 receives the vehicle approach notification drive signal having the same waveform as that of the output signal 11a in which only the 500 Hz to 800 Hz band and the 2 kHz to 5 kHz band of the vehicle approach notification signal 1a are amplified. Since the piezoelectric body 32 has the first and second resonance frequencies f1 and f2 in these regions, the pseudo engine sound in both frequency bands is efficiently generated and output. The pseudo engine sound in the 2 KHz-5 KHz band, ie, the vehicle approach sound, is effectively heard by an adult with normal hearing as described above. On the other hand, the vehicle approaching notification sound in the band of 500 Hz to 800 Hz is well listened to even to the aged people with hearing loss. Thereby, the approach of the vehicle can be reliably notified.
  • background noise is known to be large in the frequency band of 800 Hz to 2 KHz, and in the vehicle approach notification device of the present embodiment, the vehicle approach notification sound is suppressed to a small level in the frequency range, so the environmental noise is deteriorated. It is avoided.
  • the alarm signal 12a is, for example, a signal obtained by adding the high-pitched modulation wave 12ah shown in FIG. 2 (2) and the bass modulation wave 12al shown in FIG. 2 (3).

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

Le problème décrit par la présente invention est de fournir un dispositif de notification d'approche de véhicule ayant une structure compacte, qui est capable d'émettre un son de notification d'approche de véhicule dans une bande à haute fréquence. La solution selon l'invention porte sur un corps sonore d'élément piézoélectrique unique (3) ayant une première fréquence de résonance (f1) et une seconde fréquence de résonance (f2) sur un côté basse fréquence et un côté haute fréquence, respectivement; et un circuit de réglage de gain (11), un circuit d'amplificateur 13 et un circuit d'attaque élévateur (14) qui reçoivent un signal de notification d'approche de véhicule (11a) dans une bande de fréquences comprenant la première fréquence de résonance (f1) et la seconde fréquence de résonance (f2) et qui délivre le signal de notification d'approche de véhicule (11a) au corps sonore d'élément piézoélectrique (3).
PCT/JP2017/033613 2017-09-16 2017-09-16 Dispositif de notification d'approche de véhicule WO2019053906A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/033613 WO2019053906A1 (fr) 2017-09-16 2017-09-16 Dispositif de notification d'approche de véhicule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/033613 WO2019053906A1 (fr) 2017-09-16 2017-09-16 Dispositif de notification d'approche de véhicule

Publications (1)

Publication Number Publication Date
WO2019053906A1 true WO2019053906A1 (fr) 2019-03-21

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Application Number Title Priority Date Filing Date
PCT/JP2017/033613 WO2019053906A1 (fr) 2017-09-16 2017-09-16 Dispositif de notification d'approche de véhicule

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011245966A (ja) * 2010-05-26 2011-12-08 Hamanako Denso Co Ltd 車両接近通報装置
JP2012049653A (ja) * 2010-08-24 2012-03-08 Sumitomo Electric Ind Ltd 発音装置及び車両存在報知装置
JP2012218662A (ja) * 2011-04-13 2012-11-12 Anden 車両接近警報装置
JP2015027828A (ja) * 2013-07-30 2015-02-12 アンデン株式会社 車両接近通報装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011245966A (ja) * 2010-05-26 2011-12-08 Hamanako Denso Co Ltd 車両接近通報装置
JP2012049653A (ja) * 2010-08-24 2012-03-08 Sumitomo Electric Ind Ltd 発音装置及び車両存在報知装置
JP2012218662A (ja) * 2011-04-13 2012-11-12 Anden 車両接近警報装置
JP2015027828A (ja) * 2013-07-30 2015-02-12 アンデン株式会社 車両接近通報装置

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