WO2019053906A1 - Vehicle approach notification device - Google Patents
Vehicle approach notification device Download PDFInfo
- 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
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vehicle approach
- approach notification
- frequency
- frequency band
- vehicle
- Prior art date
Links
Images
Classifications
-
- 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).
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
[Problem] To provide a vehicle approach notification device with a compact structure, which is capable of emitting a vehicle approach notification sound in a high frequency band. [Solution] The present invention is provided with: a single piezoelectric element sounding body (3) having a first resonance frequency (f1) and a second resonance frequency (f2) on a low frequency side and a high frequency side, respectively; and a gain adjustment circuit (11), an amplifier circuit 13 and a step-up drive circuit (14) that receive a vehicle approach notification signal (11a) in a frequency band including the first resonance frequency (f1) and the second resonance frequency (f2) and that output the vehicle approach notification signal (11a) to the piezoelectric element sounding body (3).
Description
本発明は車両接近通報器に関し、特に、警報音に比して小さな音である車両接近通報音を良好に認識できる車両接近通報器に関するものである。
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.
環境面への考慮からハイブリッド車や電気自動車の普及が進んでいるが、これらの車両は低速走行時にはその静粛性ゆえに歩行者等が接近に気付き難いという問題があった。そこで、特許文献１に記載の装置では、警報音を発する電磁ホーンにエンジン音等を擬した車両接近通報音を発音させて、単一の電磁ホーンによって警報音とともに歩行者への車両接近通報も行うようにしている。
The spread of hybrid vehicles and electric vehicles has been promoted from the environmental point of view, but these vehicles have a problem that it is difficult for a pedestrian or the like to notice the approach at low speed due to the quietness. Therefore, in the device described in Patent Document 1, 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.
しかし、車両接近通報音は警報音に比べて小さな音であるため、上記従来の装置で、車両接近通報音を発する場合には電磁式平型警音器のダイヤフラムの振動振幅を十分小さく抑える必要があり、このため上記通報音の周波数は８０Ｈｚ～３００Ｈｚの低周波域に限られてしまう。一方、正常な聴力を有する成人は２ＫＨｚ～５ＫＨｚの高周波域に良好な感度を有することが知られている。
However, since the vehicle approach notification sound is a smaller sound than the alarm sound, it is necessary to suppress the vibration amplitude of the diaphragm of the electromagnetic flat horn sufficiently small when emitting the vehicle approach notification sound in the above-mentioned conventional apparatus. Therefore, the frequency of the notification sound is limited to the low frequency range of 80 Hz to 300 Hz. On the other hand, adults with normal hearing are known to have good sensitivity in the high frequency range of 2 KHz-5 KHz.
そこで、本発明はこのような課題を解決するもので、コンパクトな構造で低周波域の車両接近通報音に加えて高周波域の車両接近通報音も発することが可能な車両接近通報器を提供することを目的とする。
Therefore, 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
上記目的を達成するために、本第１発明では、低周波側と高周波側にそれぞれ第１の共振周波数（ｆ1）および第２の共振周波数（ｆ2）を有する単一の圧電素子発音体（３）と、前記第１の共振周波数（ｆ1）および前記第２の共振周波数（ｆ2）を含む周波数帯域の車両接近通報信号（１ａ）を入力し、当該車両接近通報信号（１ａ）を前記圧電素子発音体（３）に出力する出力手段（１３，１４）とを備える。
In order to achieve the above object, in the first invention, 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).
本第１発明においては、低周波側と高周波側にそれぞれ共振周波数を有する単一の圧電素子発音体を使用し、当該圧電素子に上記各共振周波数を含む周波数帯域の車両接近通報信号を入力するようにしたから、低周波域のみならず高周波域の車両接近通報音も効率的に出力することができ、車両接近を確実に報知することができる。また、圧電素子発音体を使用したから車両接近通報器がコンパクトになる。
In the first aspect of the present invention, 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. Thus, not only the low frequency region but also the high frequency vehicle approaching notification sound can be efficiently output, and the vehicle approaching can be reliably notified. In addition, since the piezoelectric element sounding body is used, the vehicle proximity indicator becomes compact.
本第２発明では、警報手段（１５）が操作された際に警報信号（１２ａ）を発生する警報信号発生手段（１２）をさらに備え、前記出力手段（１３，１４）は前記車両接近通報信号（１ａ）に加えて前記警報信号（１２ａ）を前記圧電素子発音体（３）に出力するように設定されている。
In the second aspect of the present invention, 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 In addition to (1a), the alarm signal (12a) is set to be output to the piezoelectric element sounding body (3).
本第２発明においては、単一の圧電素子発音体によって車両接近通報音と警報音を出力することができるから警音器としても利用できる車両接近通報器がよりコンパクトに実現される。
In the second aspect of the invention, since 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.
本第３発明では、前記出力手段（１３，１４）の前段に、前記車両接近通報信号（１ａ）のうち前記第１の共振周波数（ｆ1）を含むより狭い低周波側周波数帯域および前記第２の共振周波数（ｆ2）を含むより狭い高周波側周波数帯域で当該車両接近通報信号（１ａ）を所定の大きさに調整するとともに、前記低周波側周波数帯域と前記高周波側周波数帯域の間の周波数帯域で前記車両接近通報信号（１ａ）を小さく抑えるゲイン調整手段（１１）をさらに設ける。
In the third aspect of the present invention, 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.
本第３発明においては、第１及び第２の共振周波数でそれぞれ圧電素子発音体が効率的に作動して低周波域と高周波域の車両接近通報音が効率的に出力されるとともに、低周波側周波数帯域と高周波側周波数帯域の間の周波数帯域では車両接近通報信号が小さく抑えられるから、環境騒音の悪化が回避される。
In the third aspect of the present invention, 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. In the frequency band between the side frequency band and the high frequency side frequency band, the vehicle approach notification signal is suppressed to a small level, so that the environmental noise is prevented from being deteriorated.
本第４発明では、前記ゲイン調整手段（１１）はさらに、前記低周波側周波数帯域よりも低周波側の周波数帯域、および前記高周波側周波数帯域よりも高周波側の周波数帯域において前記車両接近通報信号（１ａ）を小さく抑えるように設定されている。
In the fourth aspect of the invention, 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.
本第４発明においては、低周波側周波数帯域よりも低周波側の周波数帯域、および前記高周波側周波数帯域よりも高周波側の周波数帯域においても車両接近通報信号（１ａ）が小さく抑えられるから、環境騒音の悪化がさらに効果的に抑えられる。
In the fourth aspect of the invention, 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.
本第５発明では、前記第１の共振周波数（ｆ1）は５００Ｈｚ～８００Ｈｚの間に設定され、前記第２の共振周波数（ｆ2）は２ＫＨｚ～５ＫＨｚの間に設定されている。
In the fifth aspect of the invention, the first resonance frequency (f1) is set between 500 Hz and 800 Hz, and the second resonance frequency (f2) is set between 2 kHz and 5 kHz.
本第５発明によれば、正常な聴力を有する成人から聴力の衰えた老人に至るまで確実に車両の接近を警報することができる。
According to the fifth aspect of the present invention, the approach of the vehicle can be reliably warned from an adult with normal hearing to an old person with impaired hearing.
上記カッコ内の符号は、後述する実施形態に記載の具体的手段との対応関係を参考的に示すものである。
The reference numerals in the parentheses indicate the correspondence with the specific means described in the embodiments to be described later.
以上のように、本発明の車両接近通報器によれば、コンパクトな構造で低周波域の車両接近通報音に加えて高周波域の車両接近通報音も出力することができる。
As described above, according to the vehicle approach notification device of the present invention, in addition to the vehicle approach notification sound in the low frequency range, the vehicle approach notification sound in the high frequency range can also be output with a compact structure.
なお、以下に説明する実施形態はあくまで一例であり、本発明の要旨を逸脱しない範囲で当業者が行う種々の設計的改良も本発明の範囲に含まれる。
The embodiments described below are merely examples, and various design improvements made by those skilled in the art without departing from the scope of the present invention are also included in the scope of the present invention.
図１には、本発明の車両接近通報器の電気回路（警音回路）のブロック構成図を示す。警音回路１は、ゲイン調整手段としてのゲイン調整回路１１、警報信号発生回路１２、これら回路１１，１２の出力信号１１a、１２ａがそれぞれ入力するアンプ回路１３、アンプ回路１３の出力信号が入力する昇圧駆動回路１４より構成されている。なお、アンプ回路１３および昇圧駆動回路１４は出力手段を構成している。
In 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.
ゲイン調整回路１１には、外部コンピュータから車両接近通報信号１ａが入力している。車両接近通報信号１ａは広い周波数帯域の例えばモータ疑似音やエンジン疑似音の信号で、車両が静粛な低速モータ走行をしている等の条件で外部コンピュータからゲイン調整回路１１へ出力される。ゲイン調整回路１１はこれに入力する上記車両接近通報信号のうち５００Ｈｚ～８００Ｈｚの帯域と、２ＫＨｚ～５ＫＨｚの帯域のみを所定の大きさに調整し、それ以外の入力は小さく抑えるように設定されている。
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.
警報信号発生回路１２には警報手段たるホーンスイッチ１５が入力接続されており、ホーンスイッチ１５を操作すると当該警報信号発生回路１２で警報信号１２ａが発生させられて出力される。警報信号１２ａの一例を図２に示す。警報信号１２ａの波形は矩形波で、第１基本矩形波の周波数３２００Ｈｚを中心にこれより４００Ｈｚだけ上下した３６００Ｈｚの領域Ｘ１と２８００Ｈｚの領域Ｙ１、および第２基本矩形波の周波数２８００Ｈｚを中心にこれより４００Ｈｚだけ上下した３２００Ｈｚの領域Ｘ２と２４００Ｈｚの領域Ｙ２をそれぞれ２．９ｍｓ（＝１／３５０（Ｈｚ））の周期で交互に繰り返すものである。
A horn switch 15, which is an alarm means, is connected to the alarm signal generation circuit 12. When the horn switch 15 is operated, 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 3200 Hz region X2 and the 2400 Hz region Y2 which are moved up and down by 400 Hz are alternately repeated with a period of 2.9 ms (= 1/350 (Hz)).
図１において、ゲイン調整回路１１の出力信号１１ａ、および警報信号発生回路１２で発生させられた警報信号１２ａはアンプ回路１３に入力して所定レベルに増幅されて昇圧駆動回路１４に入力する。昇圧駆動回路１４では上記各信号１１ａ，１２ａを、当該回路１４に接続された、構造を以下に説明する圧電素子発音体３を駆動するのに必要な電圧へ昇圧して、それぞれ車両接近通報用駆動信号および警報用駆動信号として圧電素子発音体３へ出力する。
In FIG. 1, 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.
圧電素子発音体３を備えた警音器（車両接近通報器）本体の構造を図３に示す。警音器本体は円形開放容器状の金属板ハウジング４を備えており、ハウジング４の底壁中心には取付用のステー４１がボルト結合されている。ハウジング４内にはこれに沿って開放容器状の樹脂製ホルダ４２が挿置してあり、ホルダ４２の底壁上にはこれと平行に、上記警音回路１を設けた回路基板５が配設されている。回路基板５はホルダ４２の底壁に立設されたピン部４２１に嵌装支持されている。なお、警音回路１の回路部品等は図示を省略してある。
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.
ホルダ４２の開口を閉鎖して上記回路基板５と平行に、以下に述べる圧電体３２と共に圧電素子発音体３を構成する金属製ダイヤフラム板３１が張設されており、ダイヤフラム板３１はその外周縁が、ホルダ４２の開口縁とホルダ４２の開口に覆着された樹脂製共鳴器４３の外周縁との間に挟持されている。共鳴器４３には外周部の複数個所（本実施形態では周方向等間隔で４箇所）に音出力口４３１が設けられている。
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. In the resonator 43, 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).
ダイヤフラム板３１には裏面（図３の下面）中心部に円形の圧電体３２が貼り合わせてあり、圧電体３２は図４に示すように、５００Ｈｚ～８００Ｈｚの低周波側帯域に第１の共振周波数ｆ1を有するとともに、２ＫＨｚ～５ＫＨｚの高周波側帯域に第２の共振周波数ｆ2を有している。回路基板５からは圧電体３２の一方の電極（図示略）と、圧電体３２の他方の電極（図示略）へ通じるダイヤフラム板３１とへ、それぞれ出力線３３，３４が延びている。また、回路基板５の一端には、ハウジング４外へ延びる給電コネクタ５１の一端が接続されている。なお、共鳴器４３の外方は、長穴状の放音口６１を形成した金属製カバー体６で覆われている。
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. As shown in FIG. 4, 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. Further, 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.
上述したように車両接近通報信号１ａのうち５００Ｈｚ～８００Ｈｚの帯域と２ＫＨｚ～５ＫＨｚの帯域のみが増幅された出力信号１１ａと同一波形の車両接近通報用駆動信号が入力した圧電素子発音体３は、圧電体３２がこれらの領域にそれぞれ第１および第２の共振周波数ｆ1，ｆ2を有していることから、両周波数帯域の疑似エンジン音を効率的に発生し出力する。２ＫＨｚ～５ＫＨｚの帯域の疑似エンジン音すなわち車両接近通報音は既述のように正常な聴力を有する成人に効果的に聴取される。一方、５００Ｈｚ～８００Ｈｚの帯域の車両接近通報音は聴力の衰えた老人にも良好に聴取される。これにより、車両の接近を確実に知らせることができる。
As described above, 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.
また、暗騒音は８００Ｈｚ～２ＫＨｚの周波数帯域で大きいことが知られており、本実施形態の車両接近通報器では、当該周波数帯域で車両接近通報音を小さく抑えているから、環境騒音の悪化が回避される。
In addition, 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.
ホーンスイッチ１５を操作した場合には警報信号１２ａ（図２（１））と同一波形の警報用駆動信号が圧電素子発音体３へ出力される。この警報信号１２ａは、例えば図２（２）に示す高音用変調波１２ａhと図２（３）に示す低音用変調波１２ａlを加算した信号である。ここで、信号１２ａhの波形は矩形波で、第１基本矩形波の周波数３２００Ｈｚを中心にこれより４００Ｈｚだけ上下した３６００Ｈｚの領域Ｘ１と２８００Ｈｚの領域Ｙ２を２．５ｍｓ（＝１／４００（Ｈｚ））の周期で交互に繰り返すものである。また、信号１２ａlの波形は矩形波で、第２基本矩形波の周波数２８００Ｈｚを中心にこれより４００Ｈｚだけ上下した３２００Ｈｚの領域Ｘ２と２４００Ｈｚの領域Ｙ２を２．９ｍｓ（＝１／３５０（Ｈｚ））の周期で交互に繰り返すものである。そこで、上記警報用駆動信号が入力すると圧電素子発音体３は、従来の高音用電磁式平型警音器から出力される警報音の周波数スペクトラムと低音用電磁式平型警音器から出力される警報音の周波数スぺクトラムを加算した周波数スペクトラムを有する、音色が大きく改善された警報音を発する。
When the horn switch 15 is operated, an alarm drive signal having the same waveform as that of the alarm signal 12a (FIG. 2 (1)) is output to the piezoelectric element sounding body 3. 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). Here, the waveform of the signal 12ah is a rectangular wave, and the region X1 of 3600 Hz and the region Y2 of 2800 Hz, which are raised and lowered by 400 Hz with respect to the frequency 3200 Hz of the first basic rectangular wave, are 2.5 ms (= 1/400 (Hz) It repeats alternately with the period of. In addition, the waveform of the signal 12al is a rectangular wave, and an area X2 of 3200 Hz and an area Y2 of 2400 Hz, which are 400 Hz higher and lower with respect to the frequency 2800 Hz of the second basic rectangular wave, are 2.9 ms (= 1/350 (Hz)) It repeats alternately in the cycle of Therefore, when the alarm drive signal is inputted, the piezoelectric element sounding body 3 is outputted from the frequency spectrum of the alarm sound outputted from the conventional electromagnetic type flat horn of high sound and the electromagnetic flat type horn for low frequency The alarm sound has a frequency spectrum obtained by adding the frequency spectrum of the alarm sound, and the alarm sound with greatly improved timbre is emitted.
１…警音回路、１ａ…車両接近通報信号、１１…ゲイン調整回路（ゲイン調整手段）、１１ａ…車両接近通報信号、１２…警報信号発生回路（警報信号発生手段）、１２ａ…警報信号、１３…アンプ回路（出力手段）、１４…昇圧駆動回路（出力手段）、１５…ホーンスイッチ（警報手段）、３…圧電素子発音体、ｆ1…第１の共振周波数、ｆ2…第２の共振周波数。
Reference Signs List 1 alarming circuit 1a vehicle approaching notification signal 11 gain adjusting circuit (gain adjusting device) 11a vehicle approaching notification signal 12 alarm signal generating circuit (alarm signal generating device) 12a alarm signal 13 ... Amp circuit (output means), 14 ... Boost drive circuit (output means), 15 ... Horn switch (alarm means), 3 ... Piezoelectric element sounding body, f1 ... First resonance frequency, f2 ... Second resonance frequency.
Claims (5)
- 低周波側と高周波側にそれぞれ第１の共振周波数および第２の共振周波数を有する単一の圧電素子発音体と、前記第１の共振周波数および前記第２の共振周波数を含む周波数帯域の車両接近通報信号を入力し、当該車両接近通報信号を前記圧電素子発音体に出力する出力手段とを備える車両接近通報器。 A single piezoelectric element sounding body having a first resonant frequency and a second resonant frequency on the low frequency side and the high frequency side, and a vehicle approaching in a frequency band including the first resonant frequency and the second resonant frequency A vehicle approach notification device comprising: output means for inputting a notification signal and outputting the vehicle approach notification signal to the piezoelectric element sounding body.
- 警報手段が操作された際に警報信号を発生する警報信号発生手段をさらに備え、前記出力手段は前記車両接近通報信号に加えて前記警報信号を前記圧電素子発音体に出力するように設定されている請求項１に記載の車両接近通報器。 The system further comprises alarm signal generating means for generating an alarm signal when the alarm means is operated, the output means being set to output the alarm signal to the piezoelectric element sounding body in addition to the vehicle approach notification signal The vehicle approach notification device according to claim 1.
- 前記出力手段の前段に、前記車両接近通報信号のうち前記第１の共振周波数を含むより狭い低周波側周波数帯域および前記第２の共振周波数を含むより狭い高周波側周波数帯域で当該車両接近通報信号を所定の大きさに調整するとともに、前記低周波側周波数帯域と前記高周波側周波数帯域の間の周波数帯域で前記車両接近通報信号を小さく抑えるゲイン調整手段をさらに設けた請求項１又は２に記載の車両接近通報器。 The vehicle approach notification signal in a narrower low frequency side frequency band including the first resonance frequency and a narrower high frequency side frequency band including the second resonance frequency of the vehicle approach notification signal in the front stage of the output means The vehicle according to claim 1 or 2, further comprising gain adjusting means for adjusting the vehicle approach notification signal to a small value in a frequency band between the low frequency side frequency band and the high frequency side frequency band while adjusting Vehicle approach indicator.
- 前記ゲイン調整手段はさらに、前記低周波側周波数帯域よりも低周波側の周波数帯域、および前記高周波側周波数帯域よりも高周波側の周波数帯域において前記車両接近通報信号を小さく抑えるように設定されている請求項３に記載の車両接近通報器。 The gain adjustment means is further set to suppress the vehicle approach notification signal small in a frequency band lower than the low frequency band and a frequency band higher than the high frequency band. The vehicle approach notification device according to claim 3.
- 前記第１の共振周波数は５００Ｈｚ～８００Ｈｚの間に設定され、前記第２の共振周波数は２ＫＨｚ～５ＫＨｚの間に設定されている請求項１ないし４のいずれかに記載の車両接近通報器。 The vehicle proximity indicator according to any one of claims 1 to 4, wherein the first resonance frequency is set between 500 Hz and 800 Hz, and the second resonance frequency is set between 2 kHz and 5 kHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/033613 WO2019053906A1 (en) | 2017-09-16 | 2017-09-16 | Vehicle approach notification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/033613 WO2019053906A1 (en) | 2017-09-16 | 2017-09-16 | Vehicle approach notification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2019053906A1 true WO2019053906A1 (en) | 2019-03-21 |
Family
ID=65722480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2017/033613 WO2019053906A1 (en) | 2017-09-16 | 2017-09-16 | Vehicle approach notification device |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2019053906A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011245966A (en) * | 2010-05-26 | 2011-12-08 | Hamanako Denso Co Ltd | Vehicle approach-reporting device |
| JP2012049653A (en) * | 2010-08-24 | 2012-03-08 | Sumitomo Electric Ind Ltd | Sound producing device and vehicle presence notification apparatus |
| JP2012218662A (en) * | 2011-04-13 | 2012-11-12 | Anden | Vehicle approach warning device |
| JP2015027828A (en) * | 2013-07-30 | 2015-02-12 | アンデン株式会社 | Vehicle approach notification device |
-
2017
- 2017-09-16 WO PCT/JP2017/033613 patent/WO2019053906A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011245966A (en) * | 2010-05-26 | 2011-12-08 | Hamanako Denso Co Ltd | Vehicle approach-reporting device |
| JP2012049653A (en) * | 2010-08-24 | 2012-03-08 | Sumitomo Electric Ind Ltd | Sound producing device and vehicle presence notification apparatus |
| JP2012218662A (en) * | 2011-04-13 | 2012-11-12 | Anden | Vehicle approach warning device |
| JP2015027828A (en) * | 2013-07-30 | 2015-02-12 | アンデン株式会社 | Vehicle approach notification device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8598997B2 (en) | Vehicular annunciation device and method for notifying proximity of a vehicle having an ultrasonic speaker | |
| US8451143B2 (en) | Vehicle presence notification apparatus | |
| US20120182136A1 (en) | Vehicle approach warning apparatus | |
| US8217767B2 (en) | Vehicle presence notification apparatus | |
| JP5344016B2 (en) | Vehicle presence reporting device | |
| JP2014015187A (en) | Vehicle presence notification device | |
| CN106409275B (en) | Electronic alarm | |
| JP2013216168A (en) | Vehicle existence notifying device | |
| US20130106599A1 (en) | Vehicle presence notification apparatus | |
| JP2012197041A (en) | Vehicle presence notification apparatus | |
| US20120194329A1 (en) | Sound wave generator | |
| US20120235802A1 (en) | Vehicle existence notification apparatus | |
| WO2019053906A1 (en) | Vehicle approach notification device | |
| JPWO2015186239A1 (en) | Electronic horn | |
| JP6732370B2 (en) | Vehicle approach alarm | |
| WO2021131581A1 (en) | Voice output device | |
| JP5370206B2 (en) | Vehicle presence notification device | |
| JP2017170964A (en) | Vehicle approach communicator | |
| US8823501B2 (en) | Vehicle presence notification apparatus | |
| JP5012964B2 (en) | Vehicle presence notification device | |
| JP5402849B2 (en) | Simulated engine sound generator | |
| JP2012046059A (en) | Vehicle approach notification device | |
| KR20230056492A (en) | Vehicle horn | |
| TW200539724A (en) | Audible warning device | |
| TWM614251U (en) | Buzzer structure with built-in low-frequency booster circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 17925074 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 17925074 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: JP |