JP5954520B2 - Vehicle approach notification device - Google Patents

Vehicle approach notification device Download PDF

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JP5954520B2
JP5954520B2 JP2011142019A JP2011142019A JP5954520B2 JP 5954520 B2 JP5954520 B2 JP 5954520B2 JP 2011142019 A JP2011142019 A JP 2011142019A JP 2011142019 A JP2011142019 A JP 2011142019A JP 5954520 B2 JP5954520 B2 JP 5954520B2
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vehicle
pedestrian
approaching
sound source
virtual sound
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JP2013008308A (en
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慎一朗 本田
慎一朗 本田
伊藤　政義
政義 伊藤
秀昭 新井
秀昭 新井
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Mitsubishi Motors Corp
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Description

本発明は、歩行者に、携帯端末装置を通じて、接近する車両を通報する車両接近通報装置に関する。   The present invention relates to a vehicle approach notification device that notifies a pedestrian of an approaching vehicle through a mobile terminal device.

近年、街中などでは、携帯音楽プレーヤなど携帯端末装置を携帯して、音楽など情報を聴きながら歩くことが見られる。
多くは、歩行者の耳にイヤホン部（ヘッドホーンを含む）を着けて、個人的に音楽などを聴いているため、周囲の音がほとんど聞き取れない。このため、接近する車両に気付かないことが多々あり、車両に対する安全性が確保しにくい。 2. Description of the Related Art Recently, in towns and the like, it can be seen that a portable terminal device such as a portable music player is carried and walking while listening to information such as music.
In many cases, earphones (including headphones) are worn on the pedestrian's ears and personally listen to music and the like, so the surrounding sounds are hardly audible. For this reason, there are many cases where the approaching vehicle is not noticed, and it is difficult to ensure safety for the vehicle.

そこで、特許文献１に開示されているような車両から、歩行者の利用する携帯音楽プレーヤへ警告音信号を送信して、車両の接近を歩行者に伝達する技術が提案されている。   Therefore, a technique has been proposed in which a warning sound signal is transmitted from a vehicle as disclosed in Patent Document 1 to a portable music player used by a pedestrian to convey the approach of the vehicle to the pedestrian.

特開２００９− ７８６３２号公報JP 2009-78632 A

ところが、同技術は、単に携帯音楽プレーヤから警告音を発音させるだけなので、車両がどの方向から接近するかが認識しにくい。
そこで、本発明の目的は、携帯端末装置を利用中、歩行者が、携帯端末装置を通して、的確に歩行者に接近する車両の認識が行える車両接近通報装置を提供することにある。 However, since this technology merely generates a warning sound from the portable music player, it is difficult to recognize from which direction the vehicle approaches.
Therefore, an object of the present invention is to provide a vehicle approach notification device that enables a pedestrian to accurately recognize a vehicle approaching a pedestrian through the mobile terminal device while using the mobile terminal device.

請求項１に記載の車両接近通報装置は、車両は、車両位置が検出可能な車両位置検出手段と、同車両位置を送信する車両情報送信手段とを有し、携帯端末装置は、携帯した歩行者の現在位置と同歩行者の向きとを検出する歩行者検出手段と、車両情報送信手段からの送信を受け、車両の位置と歩行者の現在位置とから歩行者に接近する車両を検出する接近車両検出手段と、歩行者の向きおよび歩行者に接近する車両にしたがい、歩行者を基準とした歩行者に接近する車両の車両存在方向に仮想音源を形成する仮想音源形成部と、形成される仮想音源からの音声信号を左右のイヤホン部から出力させる通報出力部とを有して構成され、仮想音源形成部で形成される仮想音源は、車両位置検出手段における車両位置の位置検出精度と、歩行者検出手段における歩行者位置の位置検出精度とにしたがい音声信号が制御されるものとした。 The vehicle approach notification device according to claim 1, wherein the vehicle has vehicle position detection means capable of detecting the vehicle position and vehicle information transmission means for transmitting the vehicle position, and the mobile terminal device is a portable walk Pedestrian detection means for detecting the current position of the pedestrian and the direction of the pedestrian, and transmission from the vehicle information transmission means, and detects a vehicle approaching the pedestrian from the position of the vehicle and the current position of the pedestrian. According to the approaching vehicle detection means and the pedestrian direction and the vehicle approaching the pedestrian, a virtual sound source forming unit is formed that forms a virtual sound source in the vehicle presence direction of the vehicle approaching the pedestrian with respect to the pedestrian. The virtual sound source formed by the virtual sound source forming unit includes a position detection accuracy of the vehicle position in the vehicle position detecting means, and a notification output unit that outputs sound signals from the virtual sound source from the left and right earphone units. , Pedestrian detection It was assumed that the audio signal is controlled in accordance with the position detection accuracy of the pedestrian position in stages.

同構成によると、歩行者が携帯端末装置を利用中、歩行者に接近する車両があると、同歩行者に接近する車両の存在位置にならうよう仮想音源が形成され、利用する左右のイヤホン部から仮想音源の音が通報音として、車両の存在する方向から出力される。これにより、歩行者は、携帯端末装置の利用中、歩行者に接近する車両がどの方向から接近するのかが認識される。しかも、車両位置検出手段、歩行者検出手段の位置検出精度を有効に用いた対応が行える。
請求項２に記載の発明は、さらに歩行者に接近する車両が明瞭に認識しやすいよう、接近車両検出手段は、歩行者と歩行者に接近する車両との相対位置を算出する算出手段を有し、仮想音源形成部は、歩行者の向き、算出された相対位置および歩行者に接近する車両の検出にしたがい、歩行者を基準とした歩行者に接近する車両の車両存在方向に仮想音源を形成するものとした。 According to this configuration, when a pedestrian is using a mobile terminal device and there is a vehicle approaching the pedestrian, a virtual sound source is formed to follow the position of the vehicle approaching the pedestrian, and the left and right earphones to be used The sound of the virtual sound source is output from the part as the notification sound from the direction in which the vehicle exists. Thus, the pedestrian is in use of the portable terminal device, whether the vehicle approaching the pedestrian to which direction do we contact near is recognized. In addition, it is possible to cope with the effective use of the position detection accuracy of the vehicle position detection means and the pedestrian detection means.
According to the second aspect of the present invention, the approaching vehicle detection means further includes a calculation means for calculating a relative position between the pedestrian and the vehicle approaching the pedestrian so that a vehicle approaching the pedestrian can be clearly recognized. and, the virtual sound source formation unit, pedestrian orientation, in accordance with the detection of vehicles approaching the calculated relative position and the pedestrian, the virtual sound source in the vehicle approach direction of the vehicle approaching the pedestrian relative to the pedestrian To be formed.

請求項３に記載の発明は、さらに歩行者に接近する車両が認識しやすいよう、接近車両検出手段は、歩行者と最も近い車両を選択して、歩行者に接近する車両を検出することとした。
請求項４に記載の発明は、さらに歩行者に接近する車両が、音の違いから、どのような車両であるのかが分かるよう、車両情報送信手段は、車両位置の送信とともに、歩行者に接近する車両の車格を示す車格情報を送信するものとし、仮想音源形成部で形成される仮想音源を、車格情報に応じた車両音で形成されることとした。 In the invention according to claim 3, the approaching vehicle detection means detects the vehicle approaching the pedestrian by selecting the vehicle closest to the pedestrian so that the vehicle approaching the pedestrian can be easily recognized. did.
Invention of claim 4, the vehicle further approaches the pedestrian, the difference in the sound, what is the one that can be seen a vehicle, vehicle information transmitting means may transmit the vehicle position, close to the pedestrian The vehicle case information indicating the vehicle case of the vehicle to be transmitted is transmitted, and the virtual sound source formed by the virtual sound source forming unit is formed by the vehicle sound corresponding to the vehicle case information.

請求項１の発明によれば、歩行者が携帯端末装置を利用中、歩行者に接近する車両があると、歩行者に接近する車両が存在する方向に仮想音源が形成され、利用する左右のイヤホン部から仮想音源からの音が通報音として、車両の存在する方向から出力される。
したがって、歩行者は、携帯端末装置の利用中、携帯端末装置を通して、的確に歩行者に接近する車両がどの方向から接近するのかを認識することができる。しかも、車両位置検出手段、歩行者検出手段の位置検出精度を有効に用いた対応ができる。 According to the invention of claim 1, when a pedestrian is using a mobile terminal device and there is a vehicle approaching the pedestrian , a virtual sound source is formed in the direction in which the vehicle approaching the pedestrian exists, The sound from the virtual sound source is output from the earphone unit as the notification sound from the direction in which the vehicle exists.
Therefore, the pedestrian can recognize in use of the portable terminal device through a portable terminal device, whether the vehicle is in which direction or we contact near to the approaching accurately pedestrians. In addition, it is possible to effectively handle the position detection accuracy of the vehicle position detection means and the pedestrian detection means.

請求項２の発明によれば、さらに歩行者は、歩行者に接近する車両を明瞭に認識することができる。
請求項３の発明によれば、さらに歩行者は、歩行者に接近する車両が認識しやすくなる。
請求項４の発明によれば、さらに歩行者は、歩行者に接近する車両が、音の違い（車格の違い）から、どのような車両であるのかが分かり、一層、認識が深まる。 According to the invention of claim 2, the pedestrian can clearly recognize the vehicle approaching the pedestrian .
According to the invention of claim 3, the pedestrian can easily recognize the vehicle approaching the pedestrian .
According to the invention of claim 4, the pedestrian further knows what kind of vehicle the vehicle approaching the pedestrian is based on the difference in sound (difference in vehicle grade), and the recognition further increases.

本発明の第１の実施形態に係る車両接近通報装置の構成を示すブロック図。The block diagram which shows the structure of the vehicle approach notification apparatus which concerns on the 1st Embodiment of this invention. 同装置の接近車両の存在を歩行者へ通報する制御を示すフローチャート。The flowchart which shows the control which notifies presence of the approaching vehicle of the apparatus to a pedestrian. 図２に続く制御を示すフローチャート。The flowchart which shows the control following FIG. 同通報音が車両にならい移動しながら歩行者へ伝えられる状況を説明する図。The figure explaining the condition where the report sound is conveyed to the pedestrian while moving following the vehicle. 本発明の第２の実施形態に係る要部となる車両接近通報装置の構成を示すブロック図。The block diagram which shows the structure of the vehicle approach notification apparatus used as the principal part which concerns on the 2nd Embodiment of this invention.

以下、本発明を図１〜図４に示す第１の実施形態にもとづいて説明する。
図１は車両接近通報装置の全体構成を示し、図２および図３は同装置の制御を示し、図４は同制御される仮想音源の伝わるイメージを示している。
図１に示されるように車両接近通報装置は、車両（自動車）１と、歩行者が携帯可能な携帯端末装置である、例えば携帯音楽プレーヤ１０との組み合わせから構成される。 Hereinafter, the present invention will be described based on a first embodiment shown in FIGS.
FIG. 1 shows the overall configuration of the vehicle approach notification device, FIGS. 2 and 3 show the control of the device, and FIG. 4 shows an image transmitted by the controlled virtual sound source.
As shown in FIG. 1, the vehicle approach notification device includes a combination of a vehicle (automobile) 1 and a portable music player 10 that is a portable terminal device that can be carried by a pedestrian.

このうち車両１は、図１に示されるように通常の運転に必要な各種装置に加え、自車両の位置を検出するＧＰＳ装置４（本願の車両位置検出手段に相当）や車両情報送信部５（本願の車両情報送信手段に相当）などを搭載した構成となっている。
具体的には、ＧＰＳ装置４は、ＧＰＳ衛星（複数）からのＧＰＳ信号を受信するＧＰＳ信号受信部４ａと、設定された地図情報と上記ＧＰＳ信号とにしたがい現在の自車両位置を算出する現在位置算出部４ｂとを有して構成される。また車両１には、自車両の車格、例えば軽自動車、小形乗用車、トラックなど車格を示す車種別の車格情報を格納した車格情報部６が設けられている。車両情報送信部５は、上記算出された自車両位置や上記自車両の車格情報を車外へ送信するものである。その送信範囲は、所定の範囲内（例えば自車両を中心とした１５〜２０ｍ範囲）である。 Among these, the vehicle 1 includes a GPS device 4 (corresponding to the vehicle position detection means of the present application) and a vehicle information transmission unit 5 that detects the position of the host vehicle in addition to various devices necessary for normal driving as shown in FIG. (Corresponding to the vehicle information transmission means of the present application) and the like.
Specifically, the GPS device 4 calculates a current vehicle position according to the GPS signal receiving unit 4a that receives GPS signals from GPS satellites, the set map information, and the GPS signal. And a position calculation unit 4b. In addition, the vehicle 1 is provided with a vehicle type information unit 6 that stores vehicle type information indicating the vehicle type of the host vehicle, such as a light vehicle, a small passenger car, and a truck. The vehicle information transmitting unit 5 transmits the calculated own vehicle position and the vehicle type information of the own vehicle to the outside of the vehicle. The transmission range is within a predetermined range (for example, a range of 15 to 20 m centering on the host vehicle).

携帯音楽プレーヤ１０は、図１に示されるように通常の音楽再生に必要な音楽プレーヤ部１１に加え、携帯音楽プレーヤ１０を携帯した歩行者の現在の位置を検出するＧＰＳ装置１３（本願の歩行者検出手段に相当）や上記車両１の車両情報送信部５から送信される信号を受信する車両情報受信部１４（本願の接近車両検出手段に相当）が設けられている。   As shown in FIG. 1, the portable music player 10 includes a GPS device 13 that detects the current position of a pedestrian carrying the portable music player 10 in addition to the music player unit 11 required for normal music reproduction (the walking of the present application). A vehicle information receiving unit 14 (corresponding to the approaching vehicle detecting unit of the present application) for receiving a signal transmitted from the vehicle information transmitting unit 5 of the vehicle 1 is provided.

ＧＰＳ装置１３は、ＧＰＳ衛星（複数）からのＧＰＳ信号を受信するＧＰＳ信号受信部１３ａと、設定された地図情報と上記ＧＰＳ信号とにしたがい現在の歩行者の位置を算出する現在位置算出部１３ｂとを有して構成される。
携帯音楽プレーヤ１０内には、携帯した歩行者の向き（身体の前後）を検出する歩行者向き検出部１５（ＧＰＳ装置１３と共に本願の歩行者検出手段を構成）が設けられている。同歩行者向き検出部１５は、例えば加速度センサから構成される。 The GPS device 13 includes a GPS signal receiving unit 13a that receives GPS signals from GPS satellites, and a current position calculating unit 13b that calculates a current pedestrian position according to the set map information and the GPS signal. And is configured.
The portable music player 10 is provided with a pedestrian orientation detection unit 15 (which constitutes the pedestrian detection means of the present application together with the GPS device 13) for detecting the orientation of the pedestrian carried around (front and back of the body). The pedestrian orientation detection unit 15 is composed of, for example, an acceleration sensor.

また携帯音楽プレーヤ１０内には、車両情報受信部１４から受信される車両１の現在位置（歩行者周辺に存在）と、現在位置算出部１３ｂからの歩行者の現在位置とから、歩行者に対する車両１の相対位置を算出する相対位置計算部１７（本願の接近車両検出手段を構成）が設けられ、歩行者に接近する車両１を検出、さらに述べれば歩行者向き検出部１５で検出される歩行者の向き信号と合わせて、車両１がどの方向から歩行者へ接近するかの検出が行える構造にしている。特に相対位置計算部１７には、混乱を招かないよう、歩行者と相対位置が最も近い車両１を選択する機能も設定してある。   Further, in the portable music player 10, the current position of the vehicle 1 (existing in the vicinity of the pedestrian) received from the vehicle information receiving unit 14 and the current position of the pedestrian from the current position calculating unit 13b are determined for the pedestrian. A relative position calculation unit 17 (comprising the approaching vehicle detection means of the present application) for calculating the relative position of the vehicle 1 is provided to detect the vehicle 1 approaching the pedestrian, and more specifically, detected by the pedestrian direction detection unit 15. Together with the direction signal of the pedestrian, the structure is such that it is possible to detect from which direction the vehicle 1 approaches the pedestrian. In particular, the relative position calculation unit 17 is also provided with a function for selecting the vehicle 1 having the closest relative position to the pedestrian so as not to cause confusion.

さらに携帯音楽プレーヤ１０内には、接近車両１の存在する位置に合わせて仮想音源を形成する車両接近通報音声信号制御部１９（本願の仮想音源形成部に相当）が設けられている。車両接近通報音声信号制御部１９は、歩行者の向き、接近車両１の現在位置から、歩行者を基準に接近車両１の存在方向に、通報音となる、車両１を仮想した仮想音源を形成する機能をもつ。   Further, in the portable music player 10, a vehicle approach notification audio signal control unit 19 (corresponding to the virtual sound source formation unit of the present application) that forms a virtual sound source in accordance with the position where the approaching vehicle 1 exists is provided. The vehicle approach notification audio signal control unit 19 forms a virtual sound source that is a virtual sound source of the vehicle 1 and serves as a notification sound from the direction of the pedestrian and the current position of the approaching vehicle 1 in the direction of the approaching vehicle 1 with respect to the pedestrian. It has a function to do.

特に車両接近通報音声信号制御部１９は、歩行者と接近車両１との相対位置（相対距離）を算出し得るＧＰＳ精度が確保された場合、仮想音源は、同相対位置で検出される車両存在位置に形成されるものとしている。ここでは、歩行者で的確に車両接近が認識されるよう、仮想音源は、車両１の進行方向前端部に形成するものとしている。
仮想音源には、どのような接近車両なのかの認識が行えるよう、車両１の車格に応じた車両音を用いている。このため、携帯音楽プレーヤ１０内には、予め車両１の車格別の全ての音声データを格納した車格別音声データ部２０が設けられ、車両情報受信部１４から受信される車格情報により、接近車両１に該当する車格の音声データが選ばれ、実際の接近車両の車両音と合致した仮想音源が形成されるようにしてある。 In particular, when the GPS accuracy capable of calculating the relative position (relative distance) between the pedestrian and the approaching vehicle 1 is ensured, the vehicle approach notification audio signal control unit 19 detects the virtual sound source at the same relative position. It is supposed to be formed at a position. Here, the virtual sound source is formed at the front end in the traveling direction of the vehicle 1 so that the pedestrian can accurately recognize the approach of the vehicle.
As the virtual sound source, vehicle sound corresponding to the vehicle size of the vehicle 1 is used so that the approaching vehicle can be recognized. For this reason, the portable music player 10 is provided with a vehicle-specific voice data unit 20 that stores in advance all the voice data for each vehicle type of the vehicle 1, and the vehicle music information received from the vehicle information receiving unit 14 approaches the portable music player 10. The voice data of the vehicle case corresponding to the vehicle 1 is selected, and a virtual sound source that matches the vehicle sound of the actual approaching vehicle is formed.

特に仮想音源の形成は、ＧＰＳ精度である、ＧＰＳ装置４（車両１）の位置検出精度、ＧＰＳ装置１３（携帯音楽プレーヤ１０）の位置検出精度の影響を受けるため、これら位置検出精度に応じて、自動的に仮想音源の音声信号を制御する処理がとられている。
具体的には、ＧＰＳ装置４，１３における位置検出精度は、ＧＰＳ衛星の数や高層ビルが密集する地域や上方が開けていない場所などで、変動する。つまり、ＧＰＳ装置４，１３の利用は、歩行者と車両との相対位置（相対距離）の検出ができるとき、車両の接近方向の検出ができるとき、両者ができないときなど、さまざまな状況が生じることが予想される。このため、車両接近通報音声信号制御部１９には、例えばＧＰＳ装置４，１３の位置検出精度（ＧＰＳ精度）を４つのクラス（例えば上位からクラスＳ、クラスＡ、クラスＢ、クラスＣ）分け、上位の相対距離、車両の接近方向の設定が可能な精度を有するクラス以上（ここでは車両と携帯音楽プレーヤ１０の双方がクラスＡ以上）は、車両との相対距離および車両の接近方向にしたがい仮想音源を形成し、中位の車両の接近方向だけが設定可能な精度のクラス（ここでは、車両と携帯音楽プレーヤ１０の双方がクラスＢまたはどちらかがクラスＢ）は、車両の接近方向にしたがい仮想音源を形成し、それ以下のクラスは、音の変化の無い設定（一定の音）にしている。 In particular, the formation of the virtual sound source is affected by the GPS accuracy, that is, the position detection accuracy of the GPS device 4 (vehicle 1) and the position detection accuracy of the GPS device 13 (portable music player 10). A process for automatically controlling the audio signal of the virtual sound source is taken.
Specifically, the position detection accuracy in the GPS devices 4 and 13 varies depending on the number of GPS satellites, areas where high-rise buildings are dense, places where the top is not open, and the like. In other words, the use of the GPS devices 4 and 13 causes various situations such as when the relative position (relative distance) between the pedestrian and the vehicle can be detected, when the approach direction of the vehicle can be detected, and when both cannot be performed. It is expected that. For this reason, the vehicle approach notification audio signal control unit 19 divides, for example, the position detection accuracy (GPS accuracy) of the GPS devices 4 and 13 into four classes (for example, class S, class A, class B, and class C from the top), The higher relative class and the class having accuracy that can set the approach direction of the vehicle (here, both the vehicle and the portable music player 10 are class A or higher) are virtual according to the relative distance from the vehicle and the approach direction of the vehicle. The accuracy class that forms the sound source and can set only the approach direction of the middle vehicle (here, both the vehicle and the portable music player 10 are class B or one is class B) depends on the vehicle approach direction. A virtual sound source is formed, and the classes below it are set to have no change in sound (a constant sound).

携帯音楽プレーヤ１０には、仮想音源からの音声（通報音）を、ヘッドホーン２７の左右のイヤホン部２８へ出力させる音声信号出力部２９が内蔵され、ヘッドホーン２７を装着する歩行者に、接近車両の車両存在方向や接近車両の車両存在位置に存在する接近車両の車両音が伝えられるようにしている。むろん、歩行者は、再生している音楽も聴こえるよう、携帯音楽プレーヤ１０には、再生中の音楽の音声信号に、制御している仮想音源の音声信号を合成させる音声信号合成部２９（音声信号出力部と共に、本願の通報出力部を構成）が設けられている。   The portable music player 10 has a built-in audio signal output unit 29 for outputting sound (report sound) from the virtual sound source to the left and right earphone units 28 of the headphones 27, and approaches a pedestrian wearing the headphones 27. The vehicle sound of the approaching vehicle existing in the vehicle presence direction of the vehicle or the vehicle presence position of the approaching vehicle is transmitted. Of course, the pedestrian can synthesize the audio signal of the virtual sound source being controlled to the audio signal of the music being reproduced, so that the portable music player 10 can hear the music being reproduced. The report output unit of the present application is configured together with the signal output unit.

さらに車両接近通報音声信号制御部１９には、通報を止める制御も設定されている。同制御は、例えば車両１からの受信が途絶し、途絶した時間が所定時間続くと、車両１が歩行者を通過したと判定して、車両音の出力を終える機能（通報終了手段）で設定され、これで適切に通報が果たされるようにしている。
図２および図３には、こうした接近車両の通報を行う制御フローチャートが示されている。 Further, the vehicle approach notification voice signal control unit 19 is also set to control to stop the notification. This control is set with a function (report end means) that determines that the vehicle 1 has passed a pedestrian and stops outputting the vehicle sound when reception from the vehicle 1 is interrupted and the interrupted time continues for a predetermined time, for example. This ensures that notifications are made properly.
2 and 3 show control flowcharts for reporting such approaching vehicles.

同フローチャートを説明すると、今、例えば図４中のＡ１〜Ａ３に示されるように携帯音楽プレーヤ１０を携帯した歩行者αがＴ形の路上を歩行するとする。
ここで、携帯音楽プレーヤ１０の電源スイッチ（図示しない）はオンされ、歩行者αは、頭部に装着したヘッドホーン２７を通して、再生音楽を聴きながら路上を歩行している。つまり、歩行者αは、ヘッドホーン２７からの音声により、周囲の音が聞き取りにくく、車両１の存在に気付きにくい状況で歩行している。 To explain the flowchart, it is assumed that a pedestrian α carrying the portable music player 10 walks on a T-shaped road, for example, as shown by A1 to A3 in FIG.
Here, the power switch (not shown) of the portable music player 10 is turned on, and the pedestrian α is walking on the road while listening to the reproduced music through the headphones 27 attached to the head. In other words, the pedestrian α is walking in a situation where it is difficult to hear the surrounding sounds and the vehicle 1 is hardly noticed by the sound from the headphones 27.

このとき携帯音楽プレーヤ１０では、先の電源スイッチのオン操作にしたがい、図２および図３に示される接近車両に対し通報を行う制御が始まる。
すなわち、図１に示されるように電源スイッチがオン操作されると、ステップＳ１からステップＳ２へ進み、まず、ＧＰＳ衛星からのＧＰＳ信号をＧＰＳ信号受信部１３ａから受信する。続くステップＳ３により、同ＧＰＳ信号受信部１３ａを用いて、ＧＰＳ信号の数や受信環境などから、ＧＰＳの位置検出精度を判定（クラスＳ〜クラスＣのいずれか）し、同判定したＧＰＳ精度を記憶する。 At this time, the portable music player 10 starts the control for notifying the approaching vehicle shown in FIG. 2 and FIG.
That is, when the power switch is turned on as shown in FIG. 1, the process proceeds from step S1 to step S2, and first, a GPS signal from a GPS satellite is received from the GPS signal receiving unit 13a. In subsequent step S3, the GPS signal receiving unit 13a is used to determine the GPS position detection accuracy (any of class S to class C) from the number of GPS signals and the reception environment, and the determined GPS accuracy is determined. Remember.

続くステップＳ４にて、現在位置算出部１３ｂにより、受信したＧＰＳ信号と予め設定された地図情報とにもとづき、携帯音楽プレーヤ１０の位置、すなわち歩行者αの現在位置を算出する。ついで、車両情報が受信するか否かを判定するステップＳ５へ進む。
路上を走行している車両１の車両情報送信部５からは、同車両１に搭載のＧＰＳ装置４で算出した現在の車両位置や、同車両１の車格を表す車格情報、例えば軽自動車を示す符号や車両側のＧＰＳ精度（ＧＰＳの位置検出精度）などが送信され続けている。ここで、車両情報送信部５の送信範囲は限られている。 In subsequent step S4, the current position calculation unit 13b calculates the position of the portable music player 10, that is, the current position of the pedestrian α, based on the received GPS signal and preset map information. Subsequently, it progresses to step S5 which determines whether vehicle information is received.
From the vehicle information transmission unit 5 of the vehicle 1 traveling on the road, the current vehicle position calculated by the GPS device 4 mounted on the vehicle 1 and the vehicle type information indicating the vehicle type of the vehicle 1 such as a light vehicle And the GPS accuracy (GPS position detection accuracy) on the vehicle side are continuously transmitted. Here, the transmission range of the vehicle information transmission unit 5 is limited.

このため、携帯音楽プレーヤ１０は、上記車両情報が受信可能な範囲内に車両１が存在すると、すなわち歩行者αに車両１が近づき始めると、車両１から車両情報である、車両１の現在位置、車格（軽自動車）、ＧＰＳの位置検出精度などを受信する。受信すると、ステップＳ６へ至り、歩行者αと車両１との相対位置を算出する。
ここで、複数の車両が存在するような場合、混乱をきたさないよう、車両を特定することが求められる。そのため、つぎのステップＳ７は、各車両との相対位置のうち、最も歩行者αに近い相対位置にある車両１を選択する。 For this reason, when the vehicle 1 exists within the range in which the vehicle information can be received, that is, when the vehicle 1 starts to approach the pedestrian α, the portable music player 10 detects the current position of the vehicle 1 that is vehicle information from the vehicle 1. Receives the vehicle case (light vehicle), GPS position detection accuracy, and the like. If it receives, it will reach step S6 and will calculate the relative position of pedestrian alpha and vehicles 1.
Here, when there are a plurality of vehicles, it is required to specify the vehicles so as not to cause confusion. Therefore, the next step S7 selects the vehicle 1 at the relative position closest to the pedestrian α among the relative positions with respect to each vehicle.

ついで、携帯音楽プレーヤ１０は、ステップＳ８以降の仮想音源を形成するルーチンへ進む。
すなわち、ステップＳ８においては、どれだけ接近車両に近い仮想音源が得られるかの判定のために、まず、歩行者αと車両１とのＧＰＳ精度のクラス（クラスＳ、クラスＡ、クラスＢ、クラスＣ）の組み合わせを選定する。具体的には、歩行者αのＧＰＳ精度、車両１のＧＰＳ精度の双方が共に、歩行者と車両との相対位置（相対距離）、車両の接近方向を高精度で検出可能な「クラスＡ以上」と、接近車両の接近方向が高精度で検出可能な歩行者αのＧＰＳ精度および車両１のＧＰＳ精度の双方またはどちらかが「クラスＢ」と、それ以外の歩行者αのＧＰＳ精度となる、車両１のＧＰＳ精度の双方またはどちらかが「クラスＣ」とに分ける。 Next, the portable music player 10 proceeds to a routine for forming a virtual sound source after step S8.
That is, in step S8, in order to determine how close to the approaching vehicle a virtual sound source can be obtained, first, the GPS accuracy class (class S, class A, class B, class of the pedestrian α and the vehicle 1 is determined. Select the combination of C). Specifically, both the GPS accuracy of the pedestrian α and the GPS accuracy of the vehicle 1 can detect the relative position (relative distance) between the pedestrian and the vehicle and the approach direction of the vehicle with “class A or higher”. ”And / or one of the GPS accuracy of the pedestrian α and the GPS accuracy of the vehicle 1 that can detect the approaching direction of the approaching vehicle with high accuracy is“ Class B ”and the GPS accuracy of the other pedestrian α. Both and / or the GPS accuracy of the vehicle 1 is divided into “class C”.

双方がクラスＡ以上の場合は、ステップＳ９へ進み、歩行者向き検出部１５から歩行者αの向き（進行方向前後）の情報を受け取る。続くステップＳ１０における音声信号の制御により、車格に応じた車両音（軽自動車）の音声で、歩行者αとの相対距離、車両１の接近方向がもたらす車両存在位置に、同存在位置に車両が存在するような仮想音源Ｇを形成する（図４）。さらに述べれば車両１の進行方向先端となる位置に仮想音源Ｇを形成する（図４）。この仮想音源Ｇの音声信号が、図３中のステップＳ１１のように再生中の音楽に合成される。この合成した音声信号が、ステップＳ１２に示されるようにヘッドホーン２７の左右のイヤホン部２８から出力され、仮想音源Ｇ（車両音）によって、歩行者αに車両１の存在が伝えられる。   When both are class A or more, it progresses to step S9 and receives the information of the direction (front and back) of the pedestrian α from the pedestrian direction detection unit 15. In the subsequent control of the sound signal in step S10, the sound of the vehicle sound (light car) according to the vehicle case is used to bring the vehicle to the vehicle presence position brought about by the relative distance from the pedestrian α and the approach direction of the vehicle 1. A virtual sound source G is formed as shown in FIG. More specifically, the virtual sound source G is formed at a position that is the front end of the traveling direction of the vehicle 1 (FIG. 4). The audio signal of the virtual sound source G is synthesized with the music being reproduced as in step S11 in FIG. This synthesized audio signal is output from the left and right earphone sections 28 of the headphone 27 as shown in step S12, and the presence of the vehicle 1 is transmitted to the pedestrian α by the virtual sound source G (vehicle sound).

この接近車両１が存在する方向に形成される仮想音源Ｇにより、歩行者αは、再生音楽により接近車両の車両音が聴き難くとも、どの方向から接近する車両１かが認識できる。例えば図４中の「Ａ１」に示されるように歩行者αは、左右のイヤホン部２８から伝わる仮想音源Ｇの音声から、車両存在方向から次第に車両１が接近する状況が伝わり、さらに「Ａ２」のような車両存在方向から歩行者αに最も接近する状況が伝わり、最後に「Ａ３」のように車両存在方向から車両１が歩行者αを通過する状況が伝わる。   With this virtual sound source G formed in the direction in which the approaching vehicle 1 exists, the pedestrian α can recognize from which direction the vehicle 1 is approaching, even if it is difficult to hear the vehicle sound of the approaching vehicle by the reproduced music. For example, as indicated by “A1” in FIG. 4, the pedestrian α is informed of the situation in which the vehicle 1 gradually approaches from the direction in which the vehicle 1 is present, from the sound of the virtual sound source G transmitted from the left and right earphone units 28, and further “A2”. The situation in which the pedestrian α is closest to the vehicle is transmitted from the vehicle presence direction, and finally the situation in which the vehicle 1 passes through the pedestrian α is transmitted from the vehicle presence direction as “A3”.

双方またはどちらかがクラスＢの場合は、ステップＳ１３へ進み、歩行者向き検出部１５から歩行者αの向き（進行方向前後）の情報を受け取り、続くステップＳ１４において、車格に応じ車両音（軽自動車）の音声信号を制御して、車両１の接近する方向に仮想音源Ｇを形成する（相対位置を算出するのに必要な精度が得られないため）。この仮想音源Ｇの音声信号が、同様にステップＳ１１，Ｓ１２を経て、ヘッドホーン２７の左右のイヤホン部２８から出力され、車両接近方向から接近する車両１の存在が歩行者αに伝わる。
この仮想音源Ｇの音声により、接近車両の車両音が聴き難くとも、歩行者αは、どの方向から接近する車両１かが認識できる。 If either or both are class B, the process proceeds to step S13, where information on the direction of the pedestrian α (before and after the traveling direction) is received from the pedestrian direction detection unit 15, and in step S14, the vehicle sound ( The sound source of the light vehicle is controlled to form the virtual sound source G in the direction in which the vehicle 1 approaches (because the accuracy required to calculate the relative position cannot be obtained). Similarly, the audio signal of the virtual sound source G is output from the left and right earphone units 28 of the headphone 27 through steps S11 and S12, and the presence of the vehicle 1 approaching from the vehicle approach direction is transmitted to the pedestrian α.
Even if it is difficult to hear the vehicle sound of the approaching vehicle, the pedestrian α can recognize from which direction the vehicle 1 approaches from the sound of the virtual sound source G.

接近車両１は、少なくとも車両１の存在する車両存在方向（車両接近方向）に仮想音源Ｇが形成されていれば十分に認知できる。
双方またはどちらかがクラスＣの場合は、ステップＳ１５へ進み、車格の車両音（軽自動車）が、ヘッドホーン２７の左右のイヤホン部２８から出力されるだけとなる。
なお、ステップＳ１６〜Ｓ１８に示されるように接近車両からの車両情報の受信が途絶し、連続して途絶した時間が所定時間Ｔ以上になると、接近車両が歩行者αを通過し、車両１の送信域外にまで移動したと判定して、ステップＳ１９のように仮想音源Ｇの形成を取り止め、同仮想音源Ｇの音声信号の合成を終了する。 The approaching vehicle 1 can be sufficiently recognized if the virtual sound source G is formed at least in the vehicle presence direction (vehicle approaching direction) where the vehicle 1 exists.
When both or one of them is class C, the process proceeds to step S 15, and the vehicle sound (light car) of the vehicle case is only output from the left and right earphone units 28 of the headphone 27.
In addition, as shown in steps S16 to S18, when the reception of vehicle information from the approaching vehicle is interrupted and the time when the discontinuation is continuously interrupted becomes a predetermined time T or more, the approaching vehicle passes the pedestrian α and the vehicle 1 It determines with having moved out of the transmission range, stops formation of the virtual sound source G like step S19, and complete | finishes the synthesis | combination of the audio | voice signal of the virtual sound source G.

したがって、携帯音楽プレーヤ１０に、接近車両が存在する方向に仮想音源Ｇを形成することにより、歩行者αは、携帯音楽プレーヤ１０の利用中、速やかにどの方向から接近車両が接近するのかが認識でき、接近車両に対する歩行者αの安全性の向上を図ることができる。特に歩行者αと接近する車両１との相対位置（相対距離）を算出して仮想音源Ｇを形成することにより、歩行者αと接近車両との相対距離に応じた仮想音源Ｇが形成でき、一層、接近車両が認識しやすくなり、より的確に接近車両の存在位置を認識できる。このため、一層、安全性の向上が図れる利点をもたらす。   Therefore, by forming the virtual sound source G in the direction in which the approaching vehicle exists in the portable music player 10, the pedestrian α quickly recognizes from which direction the approaching vehicle approaches while using the portable music player 10. It is possible to improve the safety of the pedestrian α with respect to the approaching vehicle. In particular, by calculating the relative position (relative distance) between the pedestrian α and the approaching vehicle 1 and forming the virtual sound source G, a virtual sound source G corresponding to the relative distance between the pedestrian α and the approaching vehicle can be formed, Further, the approaching vehicle can be easily recognized, and the position of the approaching vehicle can be recognized more accurately. For this reason, there is an advantage that the safety can be further improved.

しかも、接近車両を検出するに際し、歩行者１との相対位置から最も近い車両を選択する制御を用いたことにより、歩行者αに対し接近する車両が複数ある場合、歩行者αは混乱せずに接近車両を特定でき、接近車両が認識しやすくなる。
そのうえ、仮想音源Ｇを、車格情報に応じた車両音で形成すると、どのような車両が接近するかが分かり、一層、接近車両の認識が深まる。 Moreover, when the approaching vehicle is detected, by using the control for selecting the nearest vehicle from the relative position with the pedestrian 1, when there are a plurality of vehicles approaching the pedestrian α, the pedestrian α is not confused. It is possible to identify the approaching vehicle so that the approaching vehicle can be easily recognized.
In addition, when the virtual sound source G is formed with vehicle sounds according to the vehicle class information, it is possible to know what kind of vehicle is approaching, and the recognition of the approaching vehicle is further deepened.

さらに、車両１のＧＰＳ装置４の位置検出精度(ＧＰＳ精度)と、携帯音楽プレーヤ１０の位置検出精度(ＧＰＳ精度)とにしたがい仮想音源Ｇの音声信号を制御したことにより、これら位置検出精度を有効に用い、同精度に応じた仮想音源Ｇが形成でき、車両１側、携帯音楽プレーヤ１０側の位置検出精度を有効に用いた対応ができる。
図５は、本発明の第２の実施形態を示す。 Further, the position detection accuracy of the virtual sound source G is controlled according to the position detection accuracy (GPS accuracy) of the GPS device 4 of the vehicle 1 and the position detection accuracy (GPS accuracy) of the portable music player 10. The virtual sound source G corresponding to the same accuracy can be formed effectively, and it is possible to cope with the effective use of the position detection accuracy on the vehicle 1 side and the portable music player 10 side.
FIG. 5 shows a second embodiment of the present invention.

本実施形態は、第１の実施形態の変形例で、第１の実施形態で挙げた車格情報を格納しておく車格別音声データ部を携帯音楽プレーヤ側でなく、車両側に設けたものである。具体的には、図５に示されるように車両１側に車両接近通報音声信号データ部３０を設けて、同データ部３０に、車両の車格、例えば軽自動車、小形乗用車、トラックなど車格を示す車種別の車格情報と、同車格車両の音声データとを格納し、走行中、車両情報送信部５から、これら車両情報を送信するようにしたものである。   This embodiment is a modification of the first embodiment, in which a vehicle-specific voice data section for storing the vehicle case information mentioned in the first embodiment is provided on the vehicle side instead of the portable music player side. It is. Specifically, as shown in FIG. 5, a vehicle approach notification audio signal data unit 30 is provided on the vehicle 1 side, and in the data unit 30, vehicle grades such as light cars, small passenger cars, trucks, etc. The vehicle type information indicating the vehicle type and the voice data of the vehicle of the same vehicle type are stored, and the vehicle information is transmitted from the vehicle information transmission unit 5 during traveling.

このようにしても上述した第１の実施形態と同様の効果を奏する。但し、図５において第１の実施形態と同じ部分には同一符号を付して、その説明を省略した。
なお、本発明は、上述した実施形態に限定されるものではなく、本発明の主旨を逸脱しない範囲内で種々可変して実施しても構わない。例えば上述した実施形態では、携帯端末装置として携帯音楽プレーヤを用いた例を挙げたが、これに限らず、他の歩行者が携帯可能な携帯端末装置に本発明を適用しても構わない。むろん、ヘッドホーンに限らず、他の左右対のイヤホンを用いて、情報を聴取する携帯端末装置に本発明を適用してもよい。 Even if it does in this way, there exists an effect similar to 1st Embodiment mentioned above. However, in FIG. 5, the same parts as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
Note that the present invention is not limited to the above-described embodiment, and various modifications may be made without departing from the spirit of the present invention. For example, in the above-described embodiment, an example in which a portable music player is used as a portable terminal device has been described. However, the present invention is not limited thereto, and the present invention may be applied to a portable terminal device that can be carried by other pedestrians. Of course, the present invention may be applied not only to the headphones but also to a portable terminal device that listens to information using another pair of left and right earphones.

１ 車両
４ ＧＰＳ装置（車両位置検出手段）
５ 車両情報送信部（車両情報送信手段）
１０ 携帯音楽プレーヤ（携帯端末装置）
１３，１５ ＧＰＳ装置，歩行者向き検出部（歩行者検出手段）
１４，１７ 車両情報受信部，相対位置計算部、（接近車両検出手段）
１９ 車両接近通報音声信号制御部（仮想音源形成部）
２８ イヤホン部
２９ 音声信号出力部（通報出力部） 1 vehicle 4 GPS device (vehicle position detection means)
5 Vehicle information transmission unit (vehicle information transmission means)
10 Portable music player (portable terminal device)
13, 15 GPS device, pedestrian orientation detection unit (pedestrian detection means)
14, 17 Vehicle information receiver, relative position calculator, (approaching vehicle detection means)
19 Vehicle approach notification audio signal control unit (virtual sound source forming unit)
28 Earphone unit 29 Audio signal output unit (report output unit)

Claims (4)

左右のイヤホン部から情報が聴取可能な携帯端末装置を有し、同携帯端末装置を利用した歩行者に、前記携帯端末装置を通じて、歩行者に対し接近する車両を通報する車両接近通報装置であって、
前記車両は、車両位置が検出可能な車両位置検出手段と、同車両位置を送信する車両情報送信手段とを有し、
前記携帯端末装置は、
前記携帯端末装置を携帯した歩行者の現在位置と同歩行者の向きとを検出する歩行者検出手段と、
前記車両情報送信手段からの送信を受け、前記車両の位置と前記歩行者の現在位置とから、歩行者に接近する車両を検出する接近車両検出手段と、
前記歩行者の向きおよび前記歩行者に接近する車両の検出にしたがい、前記歩行者を基準とした前記歩行者に接近する車両の車両存在方向に仮想音源を形成する仮想音源形成部と、
前記形成される仮想音源からの音声信号を前記左右のイヤホン部から出力させる通報出力部とを有して構成され、
前記仮想音源形成部で形成される仮想音源は、前記車両位置検出手段における車両位置の位置検出精度と、前記歩行者検出手段における歩行者位置の位置検出精度とにしたがい音声信号が制御される
ことを特徴とする車両接近通報装置。 A vehicle approach notification device that has a mobile terminal device that can listen to information from the left and right earphone units, and that notifies a pedestrian using the mobile terminal device of a vehicle approaching the pedestrian through the mobile terminal device. And
The vehicle has vehicle position detection means capable of detecting a vehicle position, and vehicle information transmission means for transmitting the vehicle position,
The portable terminal device
Pedestrian detection means for detecting the current position of the pedestrian carrying the mobile terminal device and the orientation of the pedestrian;
An approaching vehicle detection means for receiving a transmission from the vehicle information transmission means and detecting a vehicle approaching the pedestrian from the position of the vehicle and the current position of the pedestrian,
According detection of vehicles approaching in the direction and the pedestrian of the pedestrian, and the virtual sound source forming unit for forming a virtual sound source in the vehicle approach direction of the vehicle approaching the pedestrian relative to the said pedestrian,
A notification output unit configured to output a sound signal from the formed virtual sound source from the left and right earphone units;
The virtual sound source formed by the virtual sound source forming unit is controlled by an audio signal according to the position detection accuracy of the vehicle position in the vehicle position detection means and the position detection accuracy of the pedestrian position in the pedestrian detection means. A vehicle approach notification device characterized by the above. 前記接近車両検出手段は、前記歩行者と前記歩行者に接近する車両との相対位置を算出する算出手段を有し、
前記仮想音源形成部は、前記歩行者の向き、前記算出された相対位置および前記歩行者に接近する車両の検出にしたがい、前記歩行者を基準とした前記歩行者に接近する車両の車両存在方向に仮想音源を形成する
ことを特徴とする請求項１に記載の車両接近通報装置。 The approaching vehicle detection means has a calculation means for calculating a relative position between the pedestrian and a vehicle approaching the pedestrian,
The virtual sound source forming unit, the pedestrian orientation, in accordance with detection of a vehicle approaching the relative position and the pedestrian the calculated vehicle presence direction of the vehicle approaching the pedestrian relative to the said pedestrian A virtual sound source is formed in the vehicle approach notification device according to claim 1. 前記接近車両検出手段は、前記歩行者と最も近い車両を選択して、前記歩行者に接近する車両を検出することを特徴とする請求項１または請求項２に記載の車両接近通報装置。 The approaching vehicle detection means selects the nearest vehicle and the pedestrian, the vehicle approach warning system according to claim 1 or claim 2, characterized in that detecting a vehicle approaching the pedestrian. 前記車両情報送信手段は、前記車両位置の送信とともに、前記歩行者に接近する車両の車格を示す車格情報を送信し、
前記仮想音源形成部で形成される仮想音源は、前記車格情報に応じた車両音で形成される
ことを特徴とする請求項１ないし請求項３のいずれか一つに記載の車両接近通報装置。 The vehicle information transmission means transmits vehicle status information indicating the vehicle status of a vehicle approaching the pedestrian, along with transmission of the vehicle position,
The vehicle approach notification device according to any one of claims 1 to 3, wherein the virtual sound source formed by the virtual sound source forming unit is formed by a vehicle sound corresponding to the vehicle type information. .
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