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JP2009040318A - Vehicle approach notification device - Google Patents

Vehicle approach notification device Download PDF

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JP2009040318A
JP2009040318A JP2007209420A JP2007209420A JP2009040318A JP 2009040318 A JP2009040318 A JP 2009040318A JP 2007209420 A JP2007209420 A JP 2007209420A JP 2007209420 A JP2007209420 A JP 2007209420A JP 2009040318 A JP2009040318 A JP 2009040318A
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notification sound
vehicle
vehicle speed
notification
sound
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Yoshitaka Fuwamoto
義孝 不破本
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Toyota Motor Corp
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Toyota Motor Corp
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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

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

Abstract

【課題】車両が所定の車速に達して告知音から走行付帯音へ移行する際の音色の変化を抑制する。
【解決手段】車両１０の前端部１０Ａには左右一対のスピーカ１２が設けられている。各スピーカ１２は車両１０のエンジンルーム１０Ｂの内部に設けられた制御装置１４に接続されており、制御装置１４は車速センサ１６に接続されている。制御装置１４は告知音信号発生装置と告知音発生装置を備えており、車速センサ１６で検出された車速データに基づいて、車両走行中でかつ車速が所定値以下の場合に、車両外部の告知対象となる歩行者へ、車両の接近を通報する告知音として、タイヤノイズと同じ音色の模擬タイヤノイズ告知音をスピーカ１２から発音するようになっている。
【選択図】図１Kind Code: A1 To suppress a change in timbre when a vehicle reaches a predetermined vehicle speed and shifts from a notification sound to a traveling incidental sound.
A pair of left and right speakers is provided at a front end portion of a vehicle. Each speaker 12 is connected to a control device 14 provided in the engine room 10 </ b> B of the vehicle 10, and the control device 14 is connected to a vehicle speed sensor 16. The control device 14 includes a notification sound signal generation device and a notification sound generation device. Based on the vehicle speed data detected by the vehicle speed sensor 16, when the vehicle is traveling and the vehicle speed is equal to or lower than a predetermined value, notification outside the vehicle is performed. A simulated tire noise notification sound having the same tone as the tire noise is generated from the speaker 12 as a notification sound for reporting the approach of the vehicle to the target pedestrian.
[Selection] Figure 1

Description

本発明は車両接近告知装置に係り、特に、電気自動車やハイブリッド車等の低騒音車両に搭載されて歩行者等の告知対象に車両の接近を気付かせるための車両接近告知装置に関する。   The present invention relates to a vehicle approach notification device, and more particularly, to a vehicle approach notification device that is mounted on a low-noise vehicle such as an electric vehicle or a hybrid vehicle to make a pedestrian or other notification object aware of the approach of the vehicle.

従来から、電気自動車やハイブリッド車等の低騒音車両に搭載されて歩行者等の告知対象に車両の接近を気付かせるための車両接近告知装置が知られている（例えば、特許文献１参照）。この技術では、車両が発進を開始すると警報音を発生させると共に、警報音の大きさを時間の経過に伴って徐々に小さくしたり、警報音の音圧を大小交互に変化させたり、車速の変化で警報音の大きさを変えるようになっている。
特開２００５−３４３３６０号公報 2. Description of the Related Art Conventionally, a vehicle approach notification device is known that is mounted on a low-noise vehicle such as an electric vehicle or a hybrid vehicle so as to notice the approach of the vehicle to a notification target such as a pedestrian (see, for example, Patent Document 1). With this technology, an alarm sound is generated when the vehicle starts to start, and the loudness of the alarm sound is gradually reduced with time, the sound pressure of the alarm sound is changed alternately in magnitude, The magnitude of the warning sound is changed by the change.
JP 2005-343360 A

しかしながら、特許文献１の技術では、車両が所定の車速に達して警報音（告知音）から走行付帯音（車両が走行中に発生するタイヤノイズ等）へ移行する際に音色の変化が大きく、歩行者等の告知対象に違和感を与える場合がある。   However, in the technique of Patent Document 1, the timbre changes greatly when the vehicle reaches a predetermined vehicle speed and shifts from an alarm sound (notification sound) to a traveling-accompaniment sound (such as tire noise generated while the vehicle is traveling). There may be a sense of incongruity in the notification target of pedestrians.

本発明は上記事実を考慮し、車両が所定の車速に達して告知音から走行付帯音へ移行する際に音色の変化を抑制できる車両接近告知装置を提供することが目的である。   In consideration of the above-described facts, an object of the present invention is to provide a vehicle approach notification device capable of suppressing a change in timbre when a vehicle reaches a predetermined vehicle speed and shifts from a notification sound to a traveling incidental sound.

請求項１記載の本発明の車両接近告知装置は、車速を検出する車速検出手段と、タイヤノイズ音を模擬した告知音を発音するための模擬タイヤノイズ告知音信号を発生する告知音信号発生手段と、車両走行中でかつ前記車速検出手段で検出した車速が所定車速以下の場合に、前記告知音信号発生手段で発生された前記模擬タイヤノイズ告知音信号に基づいて模擬タイヤノイズ告知音を車外へ発音する告知音発生手段と、を有することを特徴とする。   The vehicle approach notification device according to the first aspect of the present invention includes vehicle speed detection means for detecting a vehicle speed, and notification sound signal generation means for generating a simulated tire noise notification sound signal for generating a notification sound that simulates a tire noise sound. And when the vehicle speed detected by the vehicle speed detection means is equal to or lower than a predetermined vehicle speed, a simulated tire noise notification sound is generated based on the simulated tire noise notification sound signal generated by the notification sound signal generation means. And a notification sound generating means for generating a sound.

告知音信号発生手段はタイヤノイズ音を模擬した告知音を発音するための模擬タイヤノイズ告知音信号を発生する。また、告知音発生手段は車両走行中でかつ車速を検出する車速検出手段で検出した車速が所定車速以下の場合に、告知音信号発生手段で発生された模擬タイヤノイズ告知音信号に基づいて模擬タイヤノイズ告知音を車外へ発音する。このため、走行中の低騒音車両が所定車速に達し、告知音発生手段が車外への発音を停止した場合に、模擬タイヤノイズ告知音から低騒音車両の走行付帯音において支配的となっているタイヤノイズへ移行する際に、音色の変化が抑制される。   The notification sound signal generating means generates a simulated tire noise notification sound signal for generating a notification sound that simulates the tire noise sound. The notification sound generating means simulates based on the simulated tire noise notification sound signal generated by the notification sound signal generating means when the vehicle speed is lower than the predetermined vehicle speed while the vehicle is running and the vehicle speed is detected. A tire noise notification sound is generated outside the vehicle. For this reason, when the low-noise vehicle during traveling reaches a predetermined vehicle speed and the notification sound generating means stops sounding outside the vehicle, it is dominant in the driving incidental sound of the low-noise vehicle from the simulated tire noise notification sound. When shifting to tire noise, changes in timbre are suppressed.

請求項２記載の本発明は、請求項１に記載の車両接近告知装置において、前記車速検出手段で検出した車速が速くなるに従って、前記模擬タイヤノイズ告知音の音圧を下げるようにしたことを特徴とする。   According to a second aspect of the present invention, in the vehicle approach notification device according to the first aspect, the sound pressure of the simulated tire noise notification sound is lowered as the vehicle speed detected by the vehicle speed detection means increases. Features.

車速検出手段で検出した車速が速くなるに従って、模擬タイヤノイズ告知音の音圧を下げる。このため、模擬タイヤノイズ告知音からタイヤノイズへ移行する際に音圧の変化が抑制される。   As the vehicle speed detected by the vehicle speed detection means increases, the sound pressure of the simulated tire noise notification sound is lowered. For this reason, a change in sound pressure is suppressed when shifting from simulated tire noise notification sound to tire noise.

請求項３記載の本発明は、請求項１または請求項２に記載の車両接近告知装置において、前記車速検出手段で検出した車速が前記所定車速以下の低速側では前記模擬タイヤノイズ告知音の音圧を一定にし、前記所定車速以下の高速側では前記模擬タイヤノイズ告知音の音圧を前記低速側での音圧に比べて下げるようにしたことを特徴とする。   According to a third aspect of the present invention, in the vehicle approach notification device according to the first or second aspect, the simulated tire noise notification sound is generated when the vehicle speed detected by the vehicle speed detection means is lower than the predetermined vehicle speed. The pressure is kept constant, and the sound pressure of the simulated tire noise notification sound is lowered on the high speed side below the predetermined vehicle speed as compared with the sound pressure on the low speed side.

車速検出手段で検出した車速が所定車速以下の低速側では模擬タイヤノイズ告知音の音圧を一定にし、所定車速以下の高速側では模擬タイヤノイズ告知音の音圧を低速側での音圧に比べて下げる。このため、車速が所定車速以下の高速側における模擬タイヤノイズ告知音からタイヤノイズへ移行する際に音圧の変化が抑制される。   When the vehicle speed detected by the vehicle speed detection means is lower than the predetermined vehicle speed, the sound pressure of the simulated tire noise notification sound is constant, and when the vehicle speed is lower than the predetermined vehicle speed, the sound pressure of the simulated tire noise notification sound is changed to the sound pressure on the lower speed side. Compared to lower. For this reason, the change of the sound pressure is suppressed when shifting from the simulated tire noise notification sound on the high speed side where the vehicle speed is equal to or lower than the predetermined vehicle speed to the tire noise.

請求項４記載の本発明は、請求項１〜３の何れか１項に記載の車両接近告知装置において、前記告知音信号発生手段はアイドリング音を模擬した告知音を発音するための模擬アイドリング告知音信号を更に発生し、前記告知音発生手段はアイドリング中に前記アイドリング告知音信号に基づいてアイドリング告知音を発音するようにしたことを特徴とする。   According to a fourth aspect of the present invention, in the vehicle approach notification device according to any one of the first to third aspects, the notification sound signal generating means generates a simulated idling notification for generating a notification sound that simulates an idling sound. A sound signal is further generated, and the notification sound generating means generates an idling notification sound based on the idling notification sound signal during idling.

告知音信号発生手段はアイドリング音を模擬した告知音を発音するための模擬アイドリング告知音信号を更に発生し、告知音発生手段はアイドリング中に模擬アイドリング告知音信号に基づいて模擬アイドリング告知音を発音する。このため、模擬アイドリング告知音によって低騒音車両のアイドリング状態が告知される。   The notification sound signal generating means further generates a simulated idling notification sound signal for generating a notification sound simulating the idling sound, and the notification sound generating means generates a simulated idling notification sound based on the simulated idling notification sound signal during idling. To do. For this reason, the idling state of the low noise vehicle is notified by the simulated idling notification sound.

請求項１記載の本発明は、車両が所定の車速に達して告知音から走行付帯音へ移行する際に音色の変化を抑制できる。   According to the first aspect of the present invention, a change in timbre can be suppressed when the vehicle reaches a predetermined vehicle speed and shifts from a notification sound to a traveling incidental sound.

請求項２記載の本発明は、車両が所定の車速に達して告知音から走行付帯音へ移行する際に音圧の変化を抑制できる。   According to the second aspect of the present invention, it is possible to suppress a change in sound pressure when the vehicle reaches a predetermined vehicle speed and shifts from a notification sound to a traveling incidental sound.

請求項３記載の本発明は、車両が所定の車速に達して告知音から走行付帯音へ移行する際に音圧の変化を抑制できる。   According to the third aspect of the present invention, it is possible to suppress a change in sound pressure when the vehicle reaches a predetermined vehicle speed and shifts from a notification sound to a traveling incidental sound.

請求項４記載の本発明は、模擬アイドリング告知音によって車両のアイドリング状態を告知できる。   In the present invention, the idling state of the vehicle can be notified by the simulated idling notification sound.

本発明における車両接近告知装置の一実施形態を図１〜図４に従って説明する。   An embodiment of a vehicle approach notification device according to the present invention will be described with reference to FIGS.

なお、図中矢印ＵＰは車両上方方向を示し、図中矢印ＦＲは車両前方方向を示している。   In the figure, the arrow UP indicates the upward direction of the vehicle, and the arrow FR in the figure indicates the forward direction of the vehicle.

図１には本実施形態に係る車両接近告知装置を搭載した低騒音車両としての車両１０が車両斜め前方から見た斜視図によって示されている。   FIG. 1 is a perspective view of a vehicle 10 as a low-noise vehicle equipped with a vehicle approach notification device according to the present embodiment as viewed obliquely from the front of the vehicle.

なお、車両１０は低騒音車両の一例として走行用のエンジンとモータとを備えたハイブリッドカーである。   The vehicle 10 is a hybrid car provided with a traveling engine and a motor as an example of a low noise vehicle.

図１に示されるように、車両１０の前端部１０Ａには、スピーカ１２が左右一対設けられており、これらのスピーカ１２は車両１０のエンジンルーム１０Ｂの内部に設けられ、制御装置１４にワイヤハーネス等によって電気的に接続されている。   As shown in FIG. 1, a pair of speakers 12 is provided at the front end portion 10 </ b> A of the vehicle 10, and these speakers 12 are provided inside an engine room 10 </ b> B of the vehicle 10. Etc. are electrically connected.

また、制御装置１４は車速検出手段としての車速センサ１６にワイヤハーネス等によって電気的に接続されており、車速センサ１６で検出された車速データが制御装置１４に入力される。   The control device 14 is electrically connected to a vehicle speed sensor 16 as a vehicle speed detection means by a wire harness or the like, and vehicle speed data detected by the vehicle speed sensor 16 is input to the control device 14.

図２には本実施形態に係る車両接近告知装置がブロック図によって示されている。   FIG. 2 is a block diagram showing a vehicle approach notification device according to this embodiment.

図２に示されるように、制御装置１４は告知音信号発生手段としての告知音信号発生装置２０と、告知音発生手段としての告知音発生装置２２とを備えている。また、制御装置１４は告知音発生手段の一部を構成するスピーカ１２に接続されている。   As shown in FIG. 2, the control device 14 includes a notification sound signal generating device 20 as a notification sound signal generating means and a notification sound generating device 22 as a notification sound generating means. Moreover, the control apparatus 14 is connected to the speaker 12 which comprises a part of notification sound generation means.

告知音信号発生装置２０は、告知音信号発生装置２０に内蔵されたメモリに記録されたオーディオデータから、例えば、模擬タイヤノイズ告知音信号や模擬アイドリング告知音信号を再生し、告知音発生装置２２へ出力するようになっている。   The notification sound signal generation device 20 reproduces, for example, a simulated tire noise notification sound signal and a simulated idling notification sound signal from the audio data recorded in the memory built in the notification sound signal generation device 20, and the notification sound generation device 22. Output.

また、告知音発生装置２２はスピーカ１２に接続されている。   In addition, the notification sound generator 22 is connected to the speaker 12.

即ち、制御装置１４は、車速センサ１６で検出された車速データに基づいて、車両外部の告知対象となる歩行者へ車両の接近を通報する告知音として、スピーカ１２から模擬タイヤノイズ告知音や模擬アイドリング告知音を発音させるようになっている。   That is, based on the vehicle speed data detected by the vehicle speed sensor 16, the control device 14 uses the speaker 12 as a notification sound for notifying the approach of the vehicle to a pedestrian that is a notification target outside the vehicle. The idling notification sound is pronounced.

次に、本実施形態の作用を図３のフローチャートに従って詳細に説明する。   Next, the operation of the present embodiment will be described in detail according to the flowchart of FIG.

図３に示されるように、制御装置１４は、車両の駆動装置（車両走行用モータ）が作動を開始すると、ステップＳ１００において、車速センサ１６で検出された車速Ｖを読み込む。   As shown in FIG. 3, the control device 14 reads the vehicle speed V detected by the vehicle speed sensor 16 in step S <b> 100 when the vehicle drive device (vehicle driving motor) starts operating.

次に、ステップＳ１０２において、車速Ｖが０ｋｍ／ｈか否かの判定（車両１０がアイドリング中か否かの判定）を行い、車速Ｖが０ｋｍ／ｈ（車両１０がアイドリング中）と判定された場合には、ステップＳ１０４において、告知音発生装置２２が告知音信号発生装置２０から告知音信号Ａを受け取る（告知音発生装置２２から告知音信号発生装置２０へ告知音信号Ａを出力する）。   Next, in step S102, it is determined whether or not the vehicle speed V is 0 km / h (determining whether or not the vehicle 10 is idling), and it is determined that the vehicle speed V is 0 km / h (the vehicle 10 is idling). In this case, in step S104, the notification sound generator 22 receives the notification sound signal A from the notification sound signal generator 20 (outputs the notification sound signal A from the notification sound generator 22 to the notification sound signal generator 20).

このときの告知音信号（制御装置１４からスピーカ１２への出力信号）Ａは模擬アイドリング告知音、例えば、車両走行用モータのアイドリング時の模擬音を発生するための模擬アイドリング告知音信号となっている。一方、車両は停止しているため、走行付帯音としてのタイヤノイズの発生はない。   At this time, the notification sound signal (output signal from the control device 14 to the speaker 12) A is a simulated idling notification sound, for example, a simulated idling notification sound signal for generating a simulated sound during idling of the vehicle running motor. Yes. On the other hand, since the vehicle is stopped, there is no occurrence of tire noise as a driving incidental sound.

この結果、図４に示されるように、車外音（ａ告知音Ａ＋ｂ走行付帯音）は模擬アイドリング告知音のみとなり、歩行者等の告知対象にアイドリング状態にある車両１０の存在を告知することができる。   As a result, as shown in FIG. 4, the sound outside the vehicle (a notification sound A + b driving incidental sound) is only a simulated idling notification sound, and the presence of the vehicle 10 in the idling state can be notified to the notification target such as a pedestrian. it can.

また、ステップＳ１０２において、車速Ｖが０ｋｍ／ｈでないと判定された場合には、ステップＳ１０６において、車速Ｖが０ｋｍ／ｈより大きく５ｋｍ／ｈ以下か否かの判定を行い、車速Ｖが０ｋｍ／ｈより大きく５ｋｍ／ｈ以下と判定された場合には、ステップＳ１０８において、告知音発生装置２２が告知音信号発生装置２０から告知音信号Ｂを受け取る（告知音発生装置２２から告知音信号発生装置２０へ告知音信号Ｂを出力する）。   If it is determined in step S102 that the vehicle speed V is not 0 km / h, it is determined in step S106 whether the vehicle speed V is greater than 0 km / h and equal to or less than 5 km / h, and the vehicle speed V is 0 km / h. If it is determined that it is greater than h and 5 km / h or less, in step S108, the notification sound generator 22 receives the notification sound signal B from the notification sound signal generator 20 (the notification sound signal generator from the notification sound generator 22). The notification sound signal B is output to 20).

このときの告知音信号Ｂは、車速Ｖが１５ｋｍ／ｈにおけるタイヤノイズと同じ音色の模擬タイヤノイズ告知音を発生するための模擬タイヤノイズ告知音信号となっている。一方、車両は５ｋｍ／ｈ以下で走行しているため、走行付帯音としての実際のタイヤノイズは模擬タイヤノイズ告知音より小さい。   The notification sound signal B at this time is a simulated tire noise notification sound signal for generating a simulated tire noise notification sound having the same tone as the tire noise when the vehicle speed V is 15 km / h. On the other hand, since the vehicle is traveling at 5 km / h or less, the actual tire noise as the traveling incidental sound is smaller than the simulated tire noise notification sound.

この結果、図４に示されるように、車外音Ｂ（ａ告知音Ｂ＋ｂ走行付帯音Ｂ）は模擬タイヤノイズ告知音にタイヤノイズが混在した音となる。   As a result, as shown in FIG. 4, the vehicle exterior sound B (a notification sound B + b traveling incidental sound B) is a sound in which tire noise is mixed with the simulated tire noise notification sound.

また、ステップＳ１０６において、車速Ｖが０ｋｍ／ｈより大きく５ｋｍ／ｈ以下でない判定された場合には、ステップＳ１１０において、車速Ｖが５ｋｍ／ｈより大きく１０ｋｍ／ｈ以下か否かの判定を行い、車速Ｖが５ｋｍ／ｈより大きく１０ｋｍ／ｈ以下と判定された場合には、ステップＳ１１２において、告知音発生装置２２が告知音信号発生装置２０から告知音信号Ｃを受け取る（告知音発生装置２２から告知音信号発生装置２０へ告知音信号Ｃを出力する）。   If it is determined in step S106 that the vehicle speed V is greater than 0 km / h and not less than 5 km / h, it is determined in step S110 whether the vehicle speed V is greater than 5 km / h and not greater than 10 km / h. When it is determined that the vehicle speed V is greater than 5 km / h and equal to or less than 10 km / h, the notification sound generator 22 receives the notification sound signal C from the notification sound signal generator 20 (from the notification sound generator 22) in step S112. The notification sound signal C is output to the notification sound signal generator 20).

このときの告知音信号Ｃは、車速Ｖが１５ｋｍ／ｈにおけるタイヤノイズと同じ音色の模擬タイヤノイズ告知音を発生するための模擬タイヤノイズ告知音信号となっている。一方、車両は５ｋｍ／ｈより速く１０ｋｍ／ｈ以下で走行しているため、走行付帯音としての実際のタイヤノイズはやや大きくなるが、模擬タイヤノイズ告知音より小さい。   The notification sound signal C at this time is a simulated tire noise notification sound signal for generating a simulated tire noise notification sound having the same tone as the tire noise when the vehicle speed V is 15 km / h. On the other hand, since the vehicle is traveling at a speed higher than 5 km / h and not higher than 10 km / h, the actual tire noise as a driving incidental sound is slightly larger but smaller than the simulated tire noise notification sound.

この結果、図４に示されるように、車外音Ｃ（ａ告知音Ｃ＋ｂ走行付帯音Ｃ）は模擬タイヤノイズ告知音にタイヤノイズが混在した音となる。   As a result, as shown in FIG. 4, the vehicle exterior sound C (a notification sound C + b traveling incidental sound C) is a sound in which tire noise is mixed with the simulated tire noise notification sound.

また、ステップＳ１１０において、車速Ｖが５ｋｍ／ｈより大きく１０ｋｍ／ｈ以下でない判定された場合には、ステップＳ１１４において、車速Ｖが１０ｋｍ／ｈより大きく１５ｋｍ／ｈ以下か否かの判定を行い、車速Ｖが１０ｋｍ／ｈより大きく１５ｋｍ／ｈ以下と判定された場合には、ステップＳ１１６において、告知音発生装置２２が告知音信号発生装置２０から告知音信号Ｄを受け取る（告知音発生装置２２から告知音信号発生装置２０へ告知音信号Ｄを出力する）。   If it is determined in step S110 that the vehicle speed V is greater than 5 km / h and not less than 10 km / h, it is determined in step S114 whether the vehicle speed V is greater than 10 km / h and not greater than 15 km / h. When it is determined that the vehicle speed V is greater than 10 km / h and equal to or less than 15 km / h, the notification sound generator 22 receives the notification sound signal D from the notification sound signal generator 20 (from the notification sound generator 22) in step S116. The notification sound signal D is output to the notification sound signal generator 20).

このときの告知音信号Ｄは車速Ｖが１５ｋｍ／ｈにおけるタイヤノイズと同じ音色の模擬タイヤノイズ告知音を発生するための模擬タイヤノイズ告知音信号となっている。一方、車両は１０ｋｍ／ｈより速く１５ｋｍ／ｈ以下で走行しているため、走行付帯音としての実際のタイヤノイズは模擬タイヤノイズ告知音より大きくなる。   The notification sound signal D at this time is a simulated tire noise notification sound signal for generating a simulated tire noise notification sound having the same tone as the tire noise when the vehicle speed V is 15 km / h. On the other hand, since the vehicle is traveling faster than 10 km / h at 15 km / h or less, the actual tire noise as the traveling incidental sound is larger than the simulated tire noise notification sound.

この結果、図４に示されるように、車外音Ｄ（ａ告知音Ｄ＋ｂ走行付帯音Ｄ）は実際のタイヤノイズに模擬タイヤノイズ告知音が混在した音となる。   As a result, as shown in FIG. 4, the vehicle exterior sound D (a notification sound D + b traveling incidental sound D) is a sound in which simulated tire noise notification sound is mixed with actual tire noise.

また、ステップＳ１１４において、車速Ｖが１０ｋｍ／ｈより大きく１５ｋｍ／ｈ以下でない（車速Ｖが１５ｋｍ／ｈより大きい）と判定された場合には、ステップＳ１１８において、告知音発生装置２２が告知音信号発生装置２０から告知音信号の受け取りを停止する（告知音発生装置２２から告知音信号発生装置２０への告知音信号の出力を停止する）。   If it is determined in step S114 that the vehicle speed V is greater than 10 km / h and not less than 15 km / h (the vehicle speed V is greater than 15 km / h), in step S118, the notification sound generator 22 sends a notification sound signal. The reception of the notification sound signal from the generation device 20 is stopped (the output of the notification sound signal from the notification sound generation device 22 to the notification sound signal generation device 20 is stopped).

このとき、車両は１５ｋｍ／ｈより大きな車速Ｖで走行しているため、走行付帯音としての実際のタイヤノイズは大きくなり、図４に示される如く、車外音Ｅ（ａ告知音＋ｂ
走行付帯音Ｅ）は実際のタイヤノイズのみとなる。 At this time, since the vehicle is traveling at a vehicle speed V greater than 15 km / h, the actual tire noise as a traveling incidental sound increases, and as shown in FIG. 4, the vehicle exterior sound E (a notification sound + b
The traveling incidental sound E) is only actual tire noise.

従って、本実施形態では、車速Ｖが所定車速（１５ｋｍ／ｈ）に達し、スピーカ１２から車外へ発音される告知音（模擬タイヤノイズ告知音）が停止され、低騒音車両の走行付帯音において支配的となっている実際の車両走行付帯音（タイヤノイズ）へ移行する際に音色の変化が抑制される。   Therefore, in the present embodiment, the vehicle speed V reaches a predetermined vehicle speed (15 km / h), the notification sound (simulated tire noise notification sound) that is emitted from the speaker 12 to the outside of the vehicle is stopped, and is controlled by the traveling incidental sound of the low noise vehicle. The change in timbre is suppressed when shifting to the actual vehicle traveling incidental sound (tire noise).

この結果、告知音（模擬タイヤノイズ告知音）から実際の車両走行付帯音（タイヤノイズ）に移行する場合に、告知対象に違和感を与えることがないようにできる。   As a result, when the notification sound (simulated tire noise notification sound) is shifted to the actual vehicle traveling incidental sound (tire noise), it is possible to prevent the notification target from being uncomfortable.

また、本実施形態では、図４に示されるように、車速Ｖに基づいて、車速Ｖが１０ｋｍ／ｈより大きく１５ｋｍ／ｈ以下と判定された場合には、ステップＳ１１６において、告知音発生装置２２が告知音信号発生装置２０から告知音信号Ｄを受け取るが、このとき、告知音信号Ｄの音圧を、速Ｖが５ｋｍ／ｈより大きく１０ｋｍ／ｈ以下と判定された場合の告知音信号Ｃの音圧に比べて小さく制御している。即ち、車速センサ１６で検出した車速が速くなるに従って、模擬タイヤノイズ告知音の音圧を下げるようにしている。   Further, in the present embodiment, as shown in FIG. 4, when the vehicle speed V is determined to be greater than 10 km / h and equal to or less than 15 km / h based on the vehicle speed V, the notification sound generating device 22 is determined in step S116. Receives the notification sound signal D from the notification sound signal generator 20. At this time, the sound pressure of the notification sound signal D is determined when the speed V is determined to be greater than 5 km / h and less than 10 km / h. It is controlled smaller than the sound pressure. That is, the sound pressure of the simulated tire noise notification sound is lowered as the vehicle speed detected by the vehicle speed sensor 16 increases.

また、図４に示される如く、車速Ｖが１５ｋｍ／ｈ以下の低速側（０ｋｍ／ｈ＜Ｖ≦１０ｋｍ／ｈ）では模擬タイヤノイズ告知音の音圧を一定にし、車速Ｖが１５ｋｍ／ｈ以下の高速側（１０ｋｍ／ｈ＜Ｖ≦１５ｋｍ／ｈ）では模擬タイヤノイズ告知音の音圧を、低速側（０ｋｍ／ｈ＜Ｖ≦１０ｋｍ／ｈ）の音圧に比べて下げるようにしている。   Further, as shown in FIG. 4, on the low speed side where the vehicle speed V is 15 km / h or less (0 km / h <V ≦ 10 km / h), the sound pressure of the simulated tire noise notification sound is made constant, and the vehicle speed V is 15 km / h or less. On the high speed side (10 km / h <V ≦ 15 km / h), the sound pressure of the simulated tire noise notification sound is lowered as compared with the sound pressure on the low speed side (0 km / h <V ≦ 10 km / h).

このため、本実施形態では、模擬タイヤノイズ告知音から実際のタイヤノイズへ移行する際に、音圧の変化も抑制できる。   For this reason, in this embodiment, when shifting from the simulated tire noise notification sound to the actual tire noise, a change in sound pressure can also be suppressed.

また、本実施形態では、車両のアイドリング中に、模擬アイドリング告知音を発音する。このため、歩行者等の告知対象にアイドリング状態にある車両１０の存在を告知し、告知対象に注意を促すことができる。   In the present embodiment, a simulated idling notification sound is generated during idling of the vehicle. For this reason, the presence of the vehicle 10 in an idling state can be notified to a notification target such as a pedestrian, and attention can be urged to the notification target.

以上に於いては、本発明を特定の実施形態について詳細に説明したが、本発明は上記実施形態に限定されるものではなく、本発明の範囲内にて他の種々の実施形態が可能であることは当業者にとって明らかである。例えば、上記実施形態では、図４に示されるように、車速Ｖが０ｋｍ／ｈより大きく５ｋｍ／ｈ以下と判定された場合の告知音信号Ｂと、車速Ｖが５ｋｍ／ｈより大きく１０ｋｍ／ｈ以下と判定された場合の告知音信号Ｃとを、同じ音圧としたが、これに代えた、告知音信号Ｃの音圧を告知音信号Ｂの音圧と告知音信号Ｄの音圧との中間に設定し、車速に反比例して告知信号の音圧を小さくすることで、模擬タイヤノイズ告知音から実際のタイヤノイズへ移行する際に、音圧の変化を更に抑制できるようにしてもよい。   Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to the above-described embodiments, and various other embodiments are possible within the scope of the present invention. It will be apparent to those skilled in the art. For example, in the above embodiment, as shown in FIG. 4, the notification sound signal B when the vehicle speed V is determined to be greater than 0 km / h and equal to or less than 5 km / h, and the vehicle speed V is greater than 5 km / h to 10 km / h. The notification sound signal C when it is determined as follows is set to the same sound pressure. However, instead of this, the sound pressure of the notification sound signal C is changed to the sound pressure of the notification sound signal B and the sound pressure of the notification sound signal D. By changing the sound pressure of the notification signal in inverse proportion to the vehicle speed, the change in sound pressure can be further suppressed when shifting from simulated tire noise notification sound to actual tire noise. Good.

また、上記実施形態のスピーカ１２の配設位置と数は、上記実施形態に限定されず、車両１０の後部等の他の部位に複数設けてもよい。   Further, the arrangement positions and the number of the speakers 12 in the above embodiment are not limited to the above embodiment, and a plurality of speakers 12 may be provided in other parts such as the rear portion of the vehicle 10.

また、上記実施形態では、車速検出手段としての車速センサ１６によって車両１０の車速Ｖを検出したが、これに代えて、車両１０の車速Ｖを、ＧＰＳ（グローバルポジショニングシステム）等の外部信号から検出してもよい。   Moreover, in the said embodiment, although the vehicle speed V of the vehicle 10 was detected by the vehicle speed sensor 16 as a vehicle speed detection means, it replaces with this and the vehicle speed V of the vehicle 10 is detected from external signals, such as GPS (global positioning system). May be.

また、上記実施形態では、告知対象を歩行者としたが、告知対象は歩行者に限定されず、立ち止まっている人や自転車に乗っている人等の他の告知対象としてもよい。   In the above embodiment, the notification target is a pedestrian, but the notification target is not limited to the pedestrian, and may be another notification target such as a person who is stationary or a person riding a bicycle.

本発明の一実施形態に係る車両接近告知装置を搭載した車両を示す車両斜め前方から見た斜視図である。It is the perspective view seen from the vehicle diagonal front which shows the vehicle carrying the vehicle approach notification apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る車両接近告知装置を示すブロック図である。It is a block diagram which shows the vehicle approach notification apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る車両接近告知装置における制御の一部を示すフローチャートである。It is a flowchart which shows a part of control in the vehicle approach notification apparatus which concerns on one Embodiment of this invention. 本発明の一実施形態に係る車両接近告知装置における告知音、走行付帯音、車外音の関係を示す表である。It is a table | surface which shows the relationship of the notification sound in the vehicle approach notification apparatus which concerns on one Embodiment of this invention, a driving incidental sound, and a vehicle exterior sound.

符号の説明Explanation of symbols

１０ 車両
１２ スピーカ（告知音発生手段）
１４ 制御装置
１６ 車速センサ（車速検知手段）
２０ 告知音信号発生装置（告知音信号発生手段）
２２ 告知音発生装置（告知音発生手段） 10 Vehicle 12 Speaker (Notification sound generating means)
14 control device 16 vehicle speed sensor (vehicle speed detection means)
20 Notification sound signal generating device (notification sound signal generating means)
22 Notification sound generating device (notification sound generating means)

Claims (4)

車速を検出する車速検出手段と、
タイヤノイズ音を模擬した告知音を発音するための模擬タイヤノイズ告知音信号を発生する告知音信号発生手段と、
車両走行中でかつ前記車速検出手段で検出した車速が所定車速以下の場合に、前記告知音信号発生手段で発生された前記模擬タイヤノイズ告知音信号に基づいて模擬タイヤノイズ告知音を車外へ発音する告知音発生手段と、
を有することを特徴とする車両接近告知装置。 Vehicle speed detection means for detecting the vehicle speed;
A notification sound signal generating means for generating a simulated tire noise notification sound signal for generating a notification sound simulating a tire noise sound;
When the vehicle is running and the vehicle speed detected by the vehicle speed detection means is equal to or lower than a predetermined vehicle speed, a simulated tire noise notification sound is generated outside the vehicle based on the simulated tire noise notification sound signal generated by the notification sound signal generation means. Notification sound generating means to
A vehicle approach notification device characterized by comprising: 前記車速検出手段で検出した車速が速くなるに従って、前記模擬タイヤノイズ告知音の音圧を下げるようにしたことを特徴とする請求項１に記載の車両接近告知装置。   2. The vehicle approach notification device according to claim 1, wherein a sound pressure of the simulated tire noise notification sound is lowered as the vehicle speed detected by the vehicle speed detection means increases. 前記車速検出手段で検出した車速が前記所定車速以下の低速側では前記模擬タイヤノイズ告知音の音圧を一定にし、前記所定車速以下の高速側では前記模擬タイヤノイズ告知音の音圧を前記低速側での音圧に比べて下げるようにしたことを特徴とする請求項１または請求項２に記載の車両接近告知装置。   When the vehicle speed detected by the vehicle speed detecting means is a low speed side lower than the predetermined vehicle speed, the sound pressure of the simulated tire noise notification sound is constant, and when the vehicle speed is lower than the predetermined vehicle speed, the sound pressure of the simulated tire noise notification sound is reduced to the low speed side. The vehicle approach notification device according to claim 1, wherein the vehicle approach notification device is lower than the sound pressure at the side. 前記告知音信号発生手段はアイドリング音を模擬した告知音を発音するための模擬アイドリング告知音信号を更に発生し、前記告知音発生手段はアイドリング中に前記アイドリング告知音信号に基づいてアイドリング告知音を発音するようにしたことを特徴とする請求項１〜３の何れか１項に記載の車両接近告知装置。   The notification sound signal generating means further generates a simulated idling notification sound signal for generating a notification sound simulating the idling sound, and the notification sound generating means generates an idling notification sound based on the idling notification sound signal during idling. The vehicle approach notification device according to any one of claims 1 to 3, wherein the vehicle approach notification device is sounded.
JP2007209420A 2007-08-10 2007-08-10 Vehicle approach notification device Pending JP2009040318A (en)

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