JP2014091419A - Sound volume adjustment device for proximity alarm apparatus for use in electric automobile and the like - Google Patents

Sound volume adjustment device for proximity alarm apparatus for use in electric automobile and the like Download PDF

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JP2014091419A
JP2014091419A JP2012243170A JP2012243170A JP2014091419A JP 2014091419 A JP2014091419 A JP 2014091419A JP 2012243170 A JP2012243170 A JP 2012243170A JP 2012243170 A JP2012243170 A JP 2012243170A JP 2014091419 A JP2014091419 A JP 2014091419A
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volume
sound
vehicle
alarm
external noise
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JP5592458B2 (en
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Masahiro Fujiwara
正浩 藤原
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NIPPON LOCK KK
Nippon Lock Co Ltd
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NIPPON LOCK KK
Nippon Lock Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a sound volume adjustment device for a proximity alarm apparatus for use in alarming an approaching electric automobile and the like, the device enabled to control the sound volume of an alarm sound on the basis of external noise in a surrounding area of a vehicle in the proximity alarm apparatus for alarming approaching electric automobile and the like traveling while issuing an alarm sound.SOLUTION: A sound volume of an alarm sound can be controlled on the basis of a sound condition of a surrounding area (such as nightly calm and bustle of city). For a pedestrian and the like, cases of mistaking the alarm sound for noise and being difficult to hear the alarm sound are prevented, resulting in improving safety for the pedestrian. Further, an adjustment value is calculated by multiplying a difference between the sound volume of the external noise and that of the alarm sound by a constant (>1). If the sound volume of the external noise is larger than the sound volume of the alarm sound, the calculated adjustment value is added to the sound volume of the alarm sound, while if the sound volume of the external noise is smaller than the sound volume of the alarm sound, the adjustment value is subtracted from the sound volume of the alarm sound, and thus the sound volume of the alarm sound is adjusted.

Description

この発明は電気自動車等の接近警報装置用音量調整装置に関し、モーターを駆動源とするハイブリッド自動車、電気自動車の低速走行時に使用されるものである。     The present invention relates to a volume control device for an approach warning device such as an electric vehicle, and is used when a hybrid vehicle using a motor as a drive source and an electric vehicle run at a low speed.

ハイブリッド自動車、電気自動車においては、低速走行時にエンジン自動車が発生する走行音と同様な擬似音を警報音として発生させ、歩行者に自動車の接近を気付かせることが要求されている。
一方、対環境については車両が発する騒音も問題視されるため安全性と耐騒音性の両立が必要とされた。
このため、従来においては、車両の速度に応じて警報音の音質を変化させる調整装置が案出されていた。
In a hybrid vehicle and an electric vehicle, it is required that a pseudo sound similar to a traveling sound generated by an engine vehicle during low-speed traveling is generated as an alarm sound to make a pedestrian notice the approach of the vehicle.
On the other hand, regarding the environment, the noise generated by vehicles is also regarded as a problem, so both safety and noise resistance are required.
For this reason, conventionally, an adjustment device has been devised that changes the sound quality of the alarm sound in accordance with the speed of the vehicle.

特開2006−0264525号公報JP 2006-0264525 A 特開2012−051570号公報JP 2012-05570 A 特開2011−178342号公報JP 2011-178342 A

しかしながら、かかる従来の調整装置にあっては、警報音の音質を変化させていたにすぎないため、周囲の音の状況(夜間の静寂、都会の雑踏等)によっては、歩行者等にとってその警報音が騒音に感じたり、聞こえにくい場合が存在する結果、歩行者の安全性を維持しにくいという不都合を有した。     However, in such a conventional adjustment device, the sound quality of the alarm sound is merely changed, so depending on the surrounding sound conditions (silence at night, urban hustle, etc.) As a result, there are cases where it is difficult to maintain the safety of pedestrians.

この不都合を解消することがこの発明の課題である。     It is an object of the present invention to eliminate this inconvenience.

前記課題を達成するために、この発明に係る電気自動車等の接近警報装置用音量調整装置においては、警報音を発しながら走行する電気自動車等の接近警報装置において、車両の周囲の外来騒音に基づいて前記警報音の音量を制御するようにしたものである。     In order to achieve the above object, in the volume adjusting device for an approach warning device for an electric vehicle or the like according to the present invention, in the approach warning device for an electric vehicle or the like that travels while emitting an alarm sound, Thus, the volume of the alarm sound is controlled.

この場合、前記外来騒音の音量と前記警報音の音量との差に定数(>1)を乗じて調整値を求め、前記外来騒音の音量が前記警報の音量よりも大きいときは前記警報音の音量にこの調整値を加え、前記外来騒音の音量が前記警報音の音量よりも小さいときは前記警報音の音量から前記調整値を減じることによって前記警報音の音量を調整することもできる。 In this case, an adjustment value is obtained by multiplying the difference between the volume of the external noise and the volume of the alarm sound by a constant (> 1), and when the volume of the external noise is larger than the volume of the alarm, the alarm sound The volume of the alarm sound can be adjusted by adding this adjustment value to the volume and subtracting the adjustment value from the volume of the alarm sound when the volume of the external noise is smaller than the volume of the alarm sound.

また、この場合、前記外来騒音から前記車両騒音を除去した後に前記外来騒音の音量と前記警報音の音量との比較判別を行うこともできる。 In this case, after the vehicle noise is removed from the external noise, the volume of the external noise can be compared with the volume of the warning sound.

更に、前記警報音の音量調整後に、前記車両のスモールライトのONであるか否かの判別をし、ONの場合には前記警報音の音量を定数(>1)によって除することにより小さくすることもできる。 Further, after adjusting the volume of the warning sound, it is determined whether or not the small light of the vehicle is ON, and if it is ON, the volume of the warning sound is reduced by dividing by a constant (> 1). You can also.

また、前記車両の前部中央に警報音を発生するスピーカを設置するとともに前記車両の後部中央に前記車両騒音を集音する後部集音マイクを設置することもできる。 In addition, a speaker for generating an alarm sound may be installed at the front center of the vehicle, and a rear sound collecting microphone for collecting the vehicle noise may be installed at the rear center of the vehicle.

この発明に係る電気自動車等の接近警報装置用音量調整装置は上記のように構成されているため、即ち、警報音を発しながら走行する電気自動車等の接近警報装置において、車両の周囲の外来騒音に基づいて前記警報音の音量を制御するようにしたため、周囲の音の状況(夜間の静寂、都会の雑踏等)にもとづいて警報音の音量を制御することができる。     Since the volume control device for an approach warning device such as an electric vehicle according to the present invention is configured as described above, that is, in an approach warning device such as an electric vehicle that travels while generating an alarm sound, external noise around the vehicle Since the volume of the warning sound is controlled based on the above, the volume of the warning sound can be controlled based on the surrounding sound conditions (night silence, urban hustle, etc.).

よって、歩行者等にとってその警報音が騒音に感じたり、聞こえにくい場合が解消される結果、歩行者の安全性を向上させることができる。 Therefore, the alarm sound for the pedestrian or the like is felt as noise or the case where it is difficult to hear is eliminated, so that the safety of the pedestrian can be improved.

この場合、前記外来騒音の音量と前記警報音の音量との差に定数α(>1)を乗じて調整値を求め、前記外来騒音の音量が前記警報の音量よりも大きいときは前記警報音の音量にこの調整値を加え、前記外来騒音の音量が前記警報音の音量よりも小さいときは前記警報音の音量から前記調整値を減じることによって前記警報音の音量を調整するようにすれば、定数の調節によって、前記外来騒音の音量が前記警報の音量よりも大きいときは前記警報音の音量を前記外来騒音の音量よりも僅かに大きくすることができ、前記外来騒音の音量が前記警報音の音量よりも小さいときは前記警報音の音量を僅かに小さくすることができるため、警報音の音量を必要最小限にすることができる結果、歩行者の安全性をより一層向上させることができる。 In this case, an adjustment value is obtained by multiplying the difference between the volume of the external noise and the volume of the alarm sound by a constant α (> 1), and when the volume of the external noise is larger than the volume of the alarm, the alarm sound If the adjustment value is added to the volume of the alarm sound, and the volume of the external noise is smaller than the volume of the warning sound, the volume of the warning sound is adjusted by subtracting the adjustment value from the volume of the warning sound. The volume of the external noise can be made slightly larger than the volume of the external noise when the volume of the external noise is larger than the volume of the alarm by adjusting a constant. When the volume is lower than the volume of the sound, the volume of the warning sound can be slightly reduced. As a result, the volume of the warning sound can be minimized. As a result, the safety of the pedestrian can be further improved. it can.

また、この場合、前記外来騒音から前記車両騒音を除去した後に前記外来騒音の音量と前記警報音の音量との比較判別を行うようにすれば、歩行者近傍の外来騒音を正確に集音することができ、ひいては、警報音の音量調節をより適正におこなうことができる。 Further, in this case, if the comparison between the volume of the external noise and the volume of the warning sound is performed after removing the vehicle noise from the external noise, the external noise near the pedestrian is accurately collected. As a result, the volume of the alarm sound can be adjusted more appropriately.

更に、前記警報音の音量調整後に、前記車両のスモールライトのONであるか否かの判別をし、ONの場合には前記警報音の音量を定数β(>1)によって除することにより小さくすれば、警報音の騒音性を低下させることができる。 Further, after adjusting the volume of the warning sound, it is determined whether or not the small light of the vehicle is turned on. If it is turned on, the volume of the warning sound is divided by a constant β (> 1). If it does, the noise property of an alarm sound can be reduced.

また、前記車両の前部中央に警報音を発生するスピーカを設置するとともに前記車両の後部中央に前記車両騒音を集音する後部集音マイクを設置すれば、後部集音マイクは警報音を集音しにくいため、車両騒音に警報音が含まれにくく、よって、車両騒音を適正に集音できる。また、前部両隅部に集音マイクと合わせて設置することで外来騒音を適正に集音できる。 Further, if a speaker that generates an alarm sound is installed at the front center of the vehicle and a rear sound collecting microphone that collects the vehicle noise is installed at the rear center of the vehicle, the rear sound collecting microphone collects the alarm sound. Since it is difficult to make a sound, it is difficult for an alarm sound to be included in the vehicle noise, so that the vehicle noise can be collected appropriately. In addition, external noise can be properly collected by installing the sound collecting microphones at both front corners.

この発明に係る電気自動車等の接近警報装置用音量調整装置は実施するにあたって下記の構成に最も主要な特徴を有する。     The volume control device for an approach warning device for an electric vehicle or the like according to the present invention has the most main features in the following configuration when implemented.

「電気自動車等」とはモーターを駆動源として走行する車両のことであり、所謂、ハイブリッド自動車、電気自動車が該当する。 “Electric vehicles and the like” refers to vehicles that run using a motor as a drive source, and so-called hybrid vehicles and electric vehicles are applicable.

「警報音」にはエンジン自動車が発生する走行音と同様な擬似音が該当する。車両の低速走行時にさせ自動車の接近を歩行者に気付かせるためのものである。 The “alarm sound” corresponds to a pseudo sound similar to the traveling sound generated by the engine car. This is to make the pedestrian notice the approach of the car when the vehicle is traveling at a low speed.

「外来騒音」とは車両の周囲の状況のことであり、生活騒音等に基づく外来ノイズであり、車両後部のマイクによって集音される。 “External noise” refers to the situation around the vehicle, is external noise based on daily noise, and is collected by a microphone at the rear of the vehicle.

「車両騒音」とは主として車両の警報音、車両駆動音に基づくものであり、車両の集音マイク(後部又は側部)によって集音される。 “Vehicle noise” is mainly based on vehicle alarm sound and vehicle drive sound, and is collected by a sound collection microphone (rear part or side part) of the vehicle.

「外来騒音」、「車両騒音」及び「警報音」の音量は原則として電圧で表現されるが、これに限定されるものでない。車両の後部マイクによって集音される。 Volumes of “external noise”, “vehicle noise”, and “alarm sound” are expressed by voltage in principle, but are not limited thereto. Sound is collected by the rear microphone of the vehicle.

「調整値」は音量であり、電圧で表現される。 “Adjustment value” is volume and is expressed in voltage.

「調整値」を求めるための「定数」は1以上であれば良く、状況に合わせて適宜定めることができる。例えば2位である。 The “constant” for obtaining the “adjustment value” may be 1 or more and can be appropriately determined according to the situation. For example, 2nd place.

「外来騒音」「車両騒音の音量は1分間サンプリングして平均化する。車両の速度が20Km/hの場合1分間で約300mnの走行距離である。 “External noise” “Vehicle noise volume is sampled for 1 minute and averaged. If the vehicle speed is 20 km / h, the travel distance is about 300 mn per minute.

また、「外来騒音」「車両騒音」の平均化および「外来騒音からの車両騒音」の除去は「外来騒音」「車両騒音」を増幅後におこなう。集音マイクの感度、変換効率(音圧→電圧)にもよるが増幅率は約10倍以上が適している。 In addition, averaging of “external noise” and “vehicle noise” and removal of “vehicle noise from external noise” are performed after amplification of “external noise” and “vehicle noise”. Depending on the sensitivity of the microphone and the conversion efficiency (sound pressure → voltage), an amplification factor of about 10 times or more is suitable.

「スモールライトのON・OFFに基づいて警報音の音量を小さくする」ための「定数」は1以上であれば良く、状況に合わせて適宜定めることができる。例えば1.5位である。 The “constant” for “decreasing the volume of the alarm sound based on ON / OFF of the small light” may be 1 or more, and can be appropriately determined according to the situation. For example, it is 1.5.

以下、この発明の実施例を図面に基づいて説明する。     Embodiments of the present invention will be described below with reference to the drawings.

図1はこの発明に係る電気自動車等の接近警報装置用音量調整装置のフローチャート、図2は同接近警報装置用音量調整装置の設置された車両の平面図である。     FIG. 1 is a flowchart of a volume adjusting device for an approach warning device such as an electric vehicle according to the present invention, and FIG. 2 is a plan view of a vehicle in which the volume adjusting device for the approach warning device is installed.

図1及び図2に基づいてこの接近警報装置用音量調整装置を説明する。     The volume adjusting device for the approach warning device will be described with reference to FIGS.

図1に示すように、このシステムをスタートさせる。 As shown in FIG. 1, the system is started.

初期設定を行う。警報音の音量、集音した音量の増幅率、「調整値」を求めるための「定数」、「スモールライトがONであるか否かの判別に基づいて警報音の音量を小さくする」ための「定数」等を設定する。 Perform initial settings. Alarm sound volume, amplification factor of collected sound volume, “constant” for obtaining “adjustment value”, “decreasing alarm sound volume based on determination of whether small light is ON” Set "Constant" etc.

次に、車両10の速度を検出し、速度が0で無く且つ20km/h未満であるか否かを判別する。 Next, the speed of the vehicle 10 is detected, and it is determined whether or not the speed is not 0 and less than 20 km / h.

この条件に該当しない場合、警報音は停止の状態で再度速度を検出し前記判別を繰り返す。 If this condition is not met, the alarm sound is stopped and the speed is detected again and the determination is repeated.

この条件に該当する場合には、車両10の前部中央に設置されたスピーカ11から警報音を発生する。 When this condition is met, an alarm sound is generated from the speaker 11 installed at the front center of the vehicle 10.

そして、前部集音マイク12,12によって外来騒音を集音するとともに集音マイク13よって車両騒音を集音する。なお、前記前部集音マイク12,12は車両10の前部における両隅部に設置され、集音マイク13は車両10の後部中央に設置されている。 Then, external noise is collected by the front sound collecting microphones 12 and 12 and vehicle noise is collected by the sound collecting microphone 13. The front sound collecting microphones 12 and 12 are installed at both corners of the front portion of the vehicle 10, and the sound collecting microphone 13 is installed at the rear center of the vehicle 10.

集音された外来騒音及び車両騒音はアンプによって増幅される。 The collected external noise and vehicle noise are amplified by an amplifier.

外来騒音及び車両騒音を平均化した後、外来騒音から車両騒音を除去(オフセット)する。 After the external noise and the vehicle noise are averaged, the vehicle noise is removed (offset) from the external noise.

その後、外来騒音(車両騒音を除去したもの)の音量と警報音の音量の大きさを判別し、外来騒音の音量と前記警報音の音量との差に定数α(>1)を乗じて調整値を求める。 After that, the volume of the external noise (without vehicle noise) and the volume of the alarm sound are discriminated, and the difference between the volume of the external noise and the alarm sound is multiplied by a constant α (> 1). Find the value.

前記外来騒音の音量が前記警報の音量よりも大きいときは前記警報音の音量にこの調整値を加え前記警報音の音量を大きくする。 When the volume of the external noise is larger than the volume of the alarm, this adjustment value is added to the volume of the alarm sound to increase the volume of the alarm sound.

前記外来騒音の音量が前記警報音の音量よりも小さいときは前記警報音の音量から前記調整値を減じ前記警報音の音量を小さくする。 When the volume of the external noise is lower than the volume of the warning sound, the adjustment value is subtracted from the volume of the warning sound to reduce the volume of the warning sound.

前記警報音の音量調整後に、前記車両10のスモールライトのONであるか否かの判別をする。 After adjusting the alarm sound volume, it is determined whether or not the small light of the vehicle 10 is ON.

この条件に該当しない場合にはスモールライトがONであるか否かの判別を繰り返す。 If this condition is not met, the determination as to whether the small light is ON is repeated.

この条件に該当する場合には、前記警報音の音量を定数β(>1)によって除することにより小さくし、警報音(データ)を調整する。 When this condition is met, the volume of the alarm sound is reduced by dividing by a constant β (> 1), and the alarm sound (data) is adjusted.

調整された警報音は車両10の前部のスピーカ11から発生される。その後は、再度速度を検出し、前記速度の判別を繰り返す。 The adjusted alarm sound is generated from the speaker 11 at the front of the vehicle 10. After that, the speed is detected again and the speed determination is repeated.

この発明に係る気自動車等の接近警報装置用音量調整装置は周囲の音の状況(夜間の静寂、都会の雑踏等)にもとづいて警報音の音量を制御することができる。歩行者等にとってその警報音が騒音に感じたり、聞こえにくい場合が解消される結果、歩行者の安全性を向上させることができる。産業上の利用可能性は高いものである。
The sound volume adjusting device for an approach warning device such as an electric vehicle according to the present invention can control the volume of the warning sound based on the surrounding sound conditions (such as quietness at night, urban hustle and bustle). Pedestrians can improve the safety of pedestrians as a result of eliminating the case where the warning sound feels noisy or difficult to hear. Industrial applicability is high.

図1はこの発明に係る電気自動車等の接近警報装置用音量調整装置のフローチャートである。FIG. 1 is a flowchart of a volume adjusting device for an approach warning device such as an electric vehicle according to the present invention. 図2は同接近警報装置用音量調整装置の設置された車両の平面図である。FIG. 2 is a plan view of a vehicle in which the volume adjusting device for the approach warning device is installed.

10 … 車両
11 … スピーカ
12 … 前部集音マイク
13 … 後部集音マイク
DESCRIPTION OF SYMBOLS 10 ... Vehicle 11 ... Speaker 12 ... Front sound collection microphone 13 ... Rear sound collection microphone

この発明は電気自動車等の接近警報装置用音量調整装置に関し、モーターを駆動源とするハイブリッド自動車、電気自動車の低速走行時に使用されるものである。     The present invention relates to a volume control device for an approach warning device such as an electric vehicle, and is used when a hybrid vehicle using a motor as a drive source and an electric vehicle run at a low speed.

ハイブリッド自動車、電気自動車においては、低速走行時にエンジン自動車が発生する走行音と同様な擬似音を警報音として発生させ、歩行者に自動車の接近を気付かせることが要求されている。
一方、対環境については車両が発する騒音も問題視されるため安全性と耐騒音性の両立が必要とされた。
このため、従来においては、車両の速度に応じて警報音の音質を変化させる調整装置が案出されていた。
In a hybrid vehicle and an electric vehicle, it is required that a pseudo sound similar to a traveling sound generated by an engine vehicle during low-speed traveling is generated as an alarm sound to make a pedestrian notice the approach of the vehicle.
On the other hand, regarding the environment, the noise generated by vehicles is also regarded as a problem, so both safety and noise resistance are required.
For this reason, conventionally, an adjustment device has been devised that changes the sound quality of the alarm sound in accordance with the speed of the vehicle.

特開2006−0264525号公報JP 2006-0264525 A 特開2012−051570号公報JP 2012-05570 A 特開2011−178342号公報JP 2011-178342 A

しかしながら、かかる従来の調整装置にあっては、警報音の音質を変化させていたにすぎないため、周囲の音の状況(夜間の静寂、都会の雑踏等)によっては、歩行者等にとってその警報音が騒音に感じたり、聞こえにくい場合が存在する結果、歩行者の安全性を維持しにくいという不都合を有した。     However, in such a conventional adjustment device, the sound quality of the alarm sound is merely changed, so depending on the surrounding sound conditions (silence at night, urban hustle, etc.) As a result, there are cases where it is difficult to maintain the safety of pedestrians.

この不都合を解消することがこの発明の課題である。     It is an object of the present invention to eliminate this inconvenience.

前記課題を達成するために、この発明に係る電気自動車等の接近警報装置用音量調整装置においては、外来騒音の音量から車両騒音の音量を除去し、この除去した音量と警報音を比較してこの警報音の音量を調整する電気自動車等の接近警報装置用音量調整装置において、前記車両騒音とは主として車両の警報音、車両駆動音に基づくものである。     In order to achieve the above object, in the volume adjusting device for an approach warning device such as an electric vehicle according to the present invention, the volume of the vehicle noise is removed from the volume of the external noise, and the removed volume is compared with the warning sound. In the volume adjusting device for an approach warning device such as an electric vehicle for adjusting the volume of the warning sound, the vehicle noise is mainly based on the warning sound of the vehicle and the driving sound of the vehicle.

この場合、前記外来騒音及び前記車両騒音を平均化したのち、前記外来騒音の音量から前記車両騒音の音量を除去することもできる。 In this case, after the external noise and the vehicle noise are averaged, the volume of the vehicle noise can be removed from the volume of the external noise.

また、この場合、前記外来騒音の音量、前記車両騒音の音量及び前記警報音の音量を電圧で表現することもできる。 In this case, the volume of the external noise, the volume of the vehicle noise, and the volume of the warning sound can also be expressed by voltage.

この発明に係る電気自動車等の接近警報装置用音量調整装置は上記のように構成されているため、即ち、外来騒音の音量から車両騒音の音量を除去し、この除去した音量と警報音を比較してこの警報音の音量を調整する電気自動車等の接近警報装置用音量調整装置において、前記車両騒音は主として車両の警報音、車両駆動音に基づくものであるようにしたため、外来騒音から車両騒音除去が容易にできるものであり、周囲の音の状況(夜間の静寂、都会の雑踏等)にもとづいて警報音の音量を制御することができる。Since the volume adjusting device for an approach warning device such as an electric vehicle according to the present invention is configured as described above, that is, the volume of the vehicle noise is removed from the volume of the external noise, and the removed volume is compared with the warning sound. In the volume adjusting device for an approach warning device such as an electric vehicle for adjusting the volume of the warning sound, the vehicle noise is mainly based on the warning sound of the vehicle and the driving sound of the vehicle. It can be easily removed, and the volume of the alarm sound can be controlled based on the surrounding sound conditions (such as quietness in the night, urban hustle and bustle).

よって、歩行者等にとってその警報音が騒音に感じたり、聞こえにくい場合が解消される結果、歩行者の安全性をより一層向上させることができる。 Therefore, the alarm sound for the pedestrian or the like is felt as noise or difficult to hear, so that the safety of the pedestrian can be further improved.

この場合、前記外来騒音及び前記車両騒音を平均化したのち、前記外来騒音の音量から前記車両騒音の音量を除去することもできるため、安定した警報を発することができる。In this case, after averaging the external noise and the vehicle noise, the volume of the vehicle noise can be removed from the volume of the external noise, so that a stable alarm can be issued.

また、この場合、前記外来騒音の音量、前記車両騒音の音量及び前記警報音の音量を電圧で表現すればデータの取り扱いが容易にでき、警報音を適正に発することができる。In this case, if the volume of the external noise, the volume of the vehicle noise, and the volume of the warning sound are expressed by voltage, the data can be handled easily and the warning sound can be appropriately generated.

この発明に係る電気自動車等の接近警報装置用音量調整装置は実施するにあたって下記の構成に最も主要な特徴を有する。     The volume control device for an approach warning device for an electric vehicle or the like according to the present invention has the most main features in the following configuration when implemented.

「電気自動車等」とはモーターを駆動源として走行する車両のことであり、所謂、ハイブリッド自動車、電気自動車が該当する。 “Electric vehicles and the like” refers to vehicles that run using a motor as a drive source, and so-called hybrid vehicles and electric vehicles are applicable.

「警報音」にはエンジン自動車が発生する走行音と同様な擬似音が該当する。車両の低速走行時にさせ自動車の接近を歩行者に気付かせるためのものである。 The “alarm sound” corresponds to a pseudo sound similar to the traveling sound generated by the engine car. This is to make the pedestrian notice the approach of the car when the vehicle is traveling at a low speed.

「外来騒音」とは車両の周囲の状況のことであり、生活騒音等に基づく外来ノイズであり、車両前部のマイクによって集音される。 “External noise” refers to the situation around the vehicle, is external noise based on daily noise, and is collected by a microphone in front of the vehicle.

「車両騒音」とは主として車両の警報音、車両駆動音に基づくものであり、車両の集音マイク(後部又は側部)によって集音される。 “Vehicle noise” is mainly based on vehicle alarm sound and vehicle drive sound, and is collected by a sound collection microphone (rear part or side part) of the vehicle.

「外来騒音」、「車両騒音」及び「警報音」の音量は原則として電圧で表現されるが、これに限定されるものでない。車両の前部マイクによって集音される。 Volumes of “external noise”, “vehicle noise”, and “alarm sound” are expressed by voltage in principle, but are not limited thereto. Sound is collected by the front microphone of the vehicle.

「調整値」は音量であり、電圧で表現される。 “Adjustment value” is volume and is expressed in voltage.

「調整値」を求めるための「定数」は1以上であれば良く、状況に合わせて適宜定めることができる。例えば2位である。 The “constant” for obtaining the “adjustment value” may be 1 or more and can be appropriately determined according to the situation. For example, 2nd place.

「外来騒音」「車両騒音の音量は1分間サンプリングして平均化する。車両の速度が20Km/hの場合1分間で約300mの走行距離である。 “External noise” “Vehicle noise volume is sampled for 1 minute and averaged. If the vehicle speed is 20 km / h, the travel distance is about 300 m per minute.

また、「外来騒音」「車両騒音」の平均化および「外来騒音からの車両騒音」の除去は「外来騒音」「車両騒音」を増幅後におこなう。集音マイクの感度、変換効率(音圧→電圧)にもよるが増幅率は約10倍以上が適している。 In addition, averaging of “external noise” and “vehicle noise” and removal of “vehicle noise from external noise” are performed after amplification of “external noise” and “vehicle noise”. Depending on the sensitivity of the microphone and the conversion efficiency (sound pressure → voltage), an amplification factor of about 10 times or more is suitable.

「スモールライトのON・OFFに基づいて警報音の音量を小さくする」ための「定数」は1以上であれば良く、状況に合わせて適宜定めることができる。例えば1.5位である。 The “constant” for “decreasing the volume of the alarm sound based on ON / OFF of the small light” may be 1 or more, and can be appropriately determined according to the situation. For example, it is 1.5.

以下、この発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below with reference to the drawings.

図1はこの発明に係る電気自動車等の接近警報装置用音量調整装置のフローチャート、図2は同接近警報装置用音量調整装置の設置された車両の平面図である。     FIG. 1 is a flowchart of a volume adjusting device for an approach warning device such as an electric vehicle according to the present invention, and FIG. 2 is a plan view of a vehicle in which the volume adjusting device for the approach warning device is installed.

図1及び図2に基づいてこの接近警報装置用音量調整装置を説明する。     The volume adjusting device for the approach warning device will be described with reference to FIGS.

図1に示すように、このシステムをスタートさせる。 As shown in FIG. 1, the system is started.

初期設定を行う。警報音の音量、集音した音量の増幅率、「調整値」を求めるための「定数」、「スモールライトがONであるか否かの判別に基づいて警報音の音量を小さくする」ための「定数」等を設定する。 Perform initial settings. Alarm sound volume, amplification factor of collected sound volume, “constant” for obtaining “adjustment value”, “decreasing alarm sound volume based on determination of whether small light is ON” Set "Constant" etc.

次に、車両10の速度を検出し、速度が0で無く且つ20km/h未満であるか否かを判別する。 Next, the speed of the vehicle 10 is detected, and it is determined whether or not the speed is not 0 and less than 20 km / h.

この条件に該当しない場合、警報音は停止の状態で再度速度を検出し前記判別を繰り返す。 If this condition is not met, the alarm sound is stopped and the speed is detected again and the determination is repeated.

この条件に該当する場合には、車両10の前部中央に設置されたスピーカ11から警報音を発生する。 When this condition is met, an alarm sound is generated from the speaker 11 installed at the front center of the vehicle 10.

そして、前部集音マイク12,12によって外来騒音を集音するとともに集音マイク13よって車両騒音を集音する。なお、前記前部集音マイク12,12は車両10の前部における両隅部に設置され、集音マイク13は車両10の後部中央に設置されている。 Then, external noise is collected by the front sound collecting microphones 12 and 12 and vehicle noise is collected by the sound collecting microphone 13. The front sound collecting microphones 12 and 12 are installed at both corners of the front portion of the vehicle 10, and the sound collecting microphone 13 is installed at the rear center of the vehicle 10.

集音された外来騒音及び車両騒音はアンプによって増幅される。 The collected external noise and vehicle noise are amplified by an amplifier.

外来騒音及び車両騒音を平均化した後、外来騒音から車両騒音を除去(オフセット)する。 After the external noise and the vehicle noise are averaged, the vehicle noise is removed (offset) from the external noise.

その後、外来騒音(車両騒音を除去したもの)の音量と警報音の音量の大きさを判別し、外来騒音の音量と前記警報音の音量との差に定数α(>1)を乗じて調整値を求める。 After that, the volume of the external noise (without vehicle noise) and the volume of the alarm sound are discriminated, and the difference between the volume of the external noise and the alarm sound is multiplied by a constant α (> 1). Find the value.

前記外来騒音の音量が前記警報の音量よりも大きいときは前記警報音の音量にこの調整値を加え前記警報音の音量を大きくする。 When the volume of the external noise is larger than the volume of the alarm, this adjustment value is added to the volume of the alarm sound to increase the volume of the alarm sound.

前記外来騒音の音量が前記警報音の音量よりも小さいときは前記警報音の音量から前記調整値を減じ前記警報音の音量を小さくする。 When the volume of the external noise is lower than the volume of the warning sound, the adjustment value is subtracted from the volume of the warning sound to reduce the volume of the warning sound.

前記警報音の音量調整後に、前記車両10のスモールライトのONであるか否かの判別をする。 After adjusting the alarm sound volume, it is determined whether or not the small light of the vehicle 10 is ON.

この条件に該当しない場合にはスモールライトがONであるか否かの判別を繰り返す。 If this condition is not met, the determination as to whether the small light is ON is repeated.

この条件に該当する場合には、前記警報音の音量を定数β(>1)によって除することにより小さくし、警報音(データ)を調整する。 When this condition is met, the volume of the alarm sound is reduced by dividing by a constant β (> 1), and the alarm sound (data) is adjusted.

調整された警報音は車両10の前部のスピーカ11から発生される。その後は、再度速度を検出し、前記速度の判別を繰り返す。 The adjusted alarm sound is generated from the speaker 11 at the front of the vehicle 10. After that, the speed is detected again and the speed determination is repeated.

この発明に係る気自動車等の接近警報装置用音量調整装置は周囲の音の状況(夜間の静寂、都会の雑踏等)にもとづいて警報音の音量を制御することができる。歩行者等にとってその警報音が騒音に感じたり、聞こえにくい場合が解消される結果、歩行者の安全性を向上させることができる。産業上の利用可能性は高いものである。
The sound volume adjusting device for an approach warning device such as an electric vehicle according to the present invention can control the volume of the warning sound based on the surrounding sound conditions (such as quietness at night, urban hustle and bustle). Pedestrians can improve the safety of pedestrians as a result of eliminating the case where the warning sound feels noisy or difficult to hear. Industrial applicability is high.

図1はこの発明に係る電気自動車等の接近警報装置用音量調整装置のフローチャートである。FIG. 1 is a flowchart of a volume adjusting device for an approach warning device such as an electric vehicle according to the present invention. 図2は同接近警報装置用音量調整装置の設置された車両の平面図である。FIG. 2 is a plan view of a vehicle in which the volume adjusting device for the approach warning device is installed.

10 … 車両
11 … スピーカ
12 … 前部集音マイク
13 … 後部集音マイク
DESCRIPTION OF SYMBOLS 10 ... Vehicle 11 ... Speaker 12 ... Front sound collection microphone 13 ... Rear sound collection microphone

Claims (5)

警報音を発しながら走行する電気自動車等の接近警報装置において、車両の周囲の外来騒音に基づいて前記警報音の音量を制御することを特徴とする電気自動車等の接近警報装置用音量調整装置。 An approach alarm device for an electric vehicle or the like that travels while generating an alarm sound, wherein the volume of the alarm sound is controlled based on external noise around the vehicle. 前記外来騒音の音量と前記警報音の音量との差に定数α(>1)を乗じて調整値を求め、前記外来騒音の音量が前記警報の音量よりも大きいときは前記警報音の音量にこの調整値を加え、前記外来騒音の音量が前記警報音の音量よりも小さいときは前記警報音の音量から前記調整値を減じることによって前記警報音の音量を調整するとともに前記外来騒音には警報音も含まれるため、前記調整値を求めるにあたって警報音の周波数帯域にフィルタを掛け警報音を除去しておくことを特徴とする請求項1の電気自動車等の接近警報装置用音量調整装置。 An adjustment value is obtained by multiplying the difference between the volume of the external noise and the volume of the alarm sound by a constant α (> 1), and when the volume of the external noise is larger than the volume of the alarm, the volume of the alarm sound is set. When this adjustment value is added and the volume of the external noise is smaller than the volume of the warning sound, the volume of the warning sound is adjusted by subtracting the adjustment value from the volume of the warning sound and the external noise is warned. 2. The sound volume adjustment device for an approach warning device of an electric vehicle or the like according to claim 1, wherein a sound is included, and therefore the warning sound is removed by filtering the frequency band of the warning sound when obtaining the adjustment value. 前記外来騒音から前記車両騒音を除去した後に前記外来騒音の音量と前記警報音の音量との比較判別を行うことを特徴とする請求項2の電気自動車等の接近警報装置用音量調整装置。 3. The volume adjusting device for an approach warning device of an electric vehicle or the like according to claim 2, wherein after the vehicle noise is removed from the external noise, a comparison between the volume of the external noise and the volume of the warning sound is performed. 前記警報音の音量調整後に、前記車両のスモールライトのONであるか否かの判別をし、ONの場合には前記警報音の音量を定数β(>1)によって除することにより小さくすることを特徴とする請求項2又は請求項3の電気自動車等の接近警報装置用音量調整装置。 After adjusting the volume of the warning sound, it is determined whether or not the small light of the vehicle is ON, and if it is ON, the volume of the warning sound is reduced by dividing by a constant β (> 1). The volume adjusting device for an approach warning device for an electric vehicle or the like according to claim 2 or claim 3. 前記車両の前部中央に警報音を発生するスピーカを設置するとともに前記車両の後部中央に前記車両騒音を集音する後部集音マイクを設置したことを特徴とする請求項1、請求項2、請求項3又は請求項4の電気自動車等の接近警報装置用音量調整装置



A speaker for generating an alarm sound is installed at the front center of the vehicle, and a rear sound collecting microphone for collecting the vehicle noise is installed at the rear center of the vehicle. A volume control device for an approach warning device for an electric vehicle or the like according to claim 3 or claim 4.



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