JP5770007B2 - Intersection lighting system - Google Patents

Intersection lighting system Download PDF

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JP5770007B2
JP5770007B2 JP2011095602A JP2011095602A JP5770007B2 JP 5770007 B2 JP5770007 B2 JP 5770007B2 JP 2011095602 A JP2011095602 A JP 2011095602A JP 2011095602 A JP2011095602 A JP 2011095602A JP 5770007 B2 JP5770007 B2 JP 5770007B2
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intersection
vehicle
light distribution
distribution pattern
lamp
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JP2012224292A (en
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昭貴 金森
昭貴 金森
直樹 多々良
直樹 多々良
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Koito Manufacturing Co Ltd
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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
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/30—Indexing codes relating to the vehicle environment
    • B60Q2300/33—Driving situation
    • B60Q2300/336—Crossings

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Description

本発明は、車両前方の交差点を車両用灯具で照明するシステムに関する。   The present invention relates to a system for illuminating an intersection in front of a vehicle with a vehicular lamp.

従来、カーナビゲーション装置（カーナビ装置と略す）を利用した交差点照明システムが知られている。例えば、特許文献１には、夜間走行時にカーナビ装置のルート案内機能を利用し、車両前方に交差点を検出したときに、その形状データに従い前照灯のビーム制御を行い、ステアリング操作に連動して右左折方向の路面を先行照明し、交差点通過時の安全性を高める技術が提案されている。   Conventionally, an intersection illumination system using a car navigation device (abbreviated as a car navigation device) is known. For example, Patent Document 1 uses a route guidance function of a car navigation device when driving at night, and when an intersection is detected in front of the vehicle, performs beam control of a headlamp according to the shape data, and interlocks with steering operation. A technique has been proposed in which the road surface in the direction of right or left turn is pre-lighted to enhance safety when passing an intersection.

特開２００３−０４８４８１号公報JP 2003-048481 A

しかし、従来の照明システムによると、交差点の見通しがよくなる反面、車両がスピードを出し過ぎるおそれがあった。例えば、図８に示すように、信号機がなく一時停止義務のある交差点Ｃで、車両５１の前照灯５２が交差点Ｃを終始同じ配光パターンＰで明るく照明し続けるため、車両５１が交差点Ｃの手前で一時停止を怠ったり、充分に減速しないまま交差点Ｃに進入してしまうという危険があった。   However, according to the conventional lighting system, the view of the intersection is improved, but the vehicle may be too fast. For example, as shown in FIG. 8, the headlight 52 of the vehicle 51 continues to illuminate the intersection C with the same light distribution pattern P from beginning to end at the intersection C where there is no traffic signal and is obliged to temporarily stop. There was a danger of neglecting a temporary stop before entering or entering the intersection C without sufficiently decelerating.

そこで、本発明の目的は、交差点の手前で車両を一時停止または充分に減速させることができる交差点照明システムを提供することにある。   Therefore, an object of the present invention is to provide an intersection lighting system that can temporarily stop or sufficiently decelerate a vehicle before an intersection.

上記課題を解決するために、本発明は次のような交差点照明システムを提供する。
（１）車両前方を照明する車両用灯具と、車両前方の交差点を検出する検出手段と、検出後に交差点の視認性が低くなるように、車両用灯具の配光パターンを切り替える制御手段とを備えたことを特徴とする交差点照明システム。 In order to solve the above problems, the present invention provides the following intersection illumination system.
(1) A vehicle lamp that illuminates the front of the vehicle, a detection unit that detects an intersection in front of the vehicle, and a control unit that switches a light distribution pattern of the vehicle lamp so that the visibility of the intersection is lowered after detection. Intersection lighting system characterized by that.

（２）検出手段が交差点を検出した後に、車両用灯具が交差点の手前までの領域を限定的に照明するように、制御手段が車両用灯具の配光パターンを切り替える（１）に記載の交差点照明システム。 (2) The intersection according to (1), wherein the control means switches the light distribution pattern of the vehicular lamp so that the vehicular lamp illuminates a limited area before the intersection after the detecting means detects the intersection. Lighting system.

（３）検出手段が交差点を検出した後に、車両用灯具が交差点の内側領域を相対的に暗く、交差点の側方領域を相対的に明るく照明するように、制御手段が車両用灯具の配光パターンを切り替える（１）に記載の交差点照明システム。 (3) After the detection means detects the intersection, the control means causes the light distribution of the vehicle lamp so that the vehicular lamp illuminates the area inside the intersection relatively dark and the side area of the intersection relatively brightly. The intersection illumination system according to (1), wherein the patterns are switched.

（４）車両が交差点に進入する直前に、車両用灯具が水平方向の照明範囲を拡張するように、制御手段が車両用灯具の配光パターンを切り替える（１）、（２）または（３）に記載の交差点照明システム。 (4) Immediately before the vehicle enters the intersection, the control means switches the light distribution pattern of the vehicle lamp so that the vehicle lamp extends the horizontal illumination range (1), (2) or (3) Intersection lighting system as described in.

（５）車両が交差点に進入する直前に、車両用灯具が点滅光を発生するように、制御手段が車両用灯具の配光パターンを切り替える（１）、（２）、（３）または（４）に記載の交差点照明システム。 (5) Immediately before the vehicle enters the intersection, the control means switches the light distribution pattern of the vehicle lamp so that the vehicle lamp generates flashing light (1), (2), (3) or (4 ) Intersection lighting system.

本発明の交差点照明システムによれば、交差点の検出を契機に、車両用灯具がその交差点を暗く照明するので、交差点の見通しを意図的に低下させ、運転者に一時停止または充分な減速を徹底させることができるという効果がある。   According to the intersection illumination system of the present invention, when the intersection is detected, the vehicular lamp illuminates the intersection darkly. Therefore, the view of the intersection is intentionally lowered, and the driver is temporarily stopped or sufficiently decelerated. There is an effect that can be made.

本発明の一実施形態を示す交差点照明システムのブロック図である。It is a block diagram of the intersection lighting system which shows one Embodiment of this invention. 図１の照明システムの動作を示すフローチャートである。It is a flowchart which shows operation | movement of the illumination system of FIG. 交差点を検出した直後の配光パターンを示す模式図である。It is a schematic diagram which shows the light distribution pattern immediately after detecting an intersection. 図３に続く配光パターンを示す模式図である。It is a schematic diagram which shows the light distribution pattern following FIG. 一時停止後の配光パターンを示す模式図である。It is a schematic diagram which shows the light distribution pattern after a temporary stop. 交差点通過後の配光パターンを示す模式図である。It is a schematic diagram which shows the light distribution pattern after an intersection passage. 交差点検出後の別の配光パターンを示す模式図である。It is a schematic diagram which shows another light distribution pattern after an intersection detection. 従来の照明システムによる配光パターンを示す模式図である。It is a schematic diagram which shows the light distribution pattern by the conventional illumination system.

以下、本発明の実施形態を図面に基づいて説明する。図１に示すように、この実施形態の交差点照明システム１は、車両２の前方を照明する前照灯３と、車両２の現在位置および交差点位置を認識する機能を備えたカーナビ装置４と、カーナビ装置４からの位置情報に基づいて前照灯３の照明範囲に含まれる交差点を検出する交差点検出部５と、車両２の速度を検出する車速センサ６とが設けられている。なお、交差点検出部５は、車載カメラが撮像した画像情報や路車間通信で取得した道路インフラ情報に基づいて交差点を検出することもできる。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, an intersection illumination system 1 of this embodiment includes a headlamp 3 that illuminates the front of a vehicle 2, a car navigation device 4 that has a function of recognizing the current position and the intersection position of the vehicle 2, An intersection detection unit 5 that detects an intersection included in the illumination range of the headlamp 3 based on position information from the car navigation device 4 and a vehicle speed sensor 6 that detects the speed of the vehicle 2 are provided. In addition, the intersection detection part 5 can also detect an intersection based on the road infrastructure information acquired by the image information which the vehicle-mounted camera imaged, and road-to-vehicle communication.

前照灯３は、配光パターンを形成するシェード７と、シェード７を駆動するアクチュエータ８と、アクチュエータ８および光源（図示略）を制御する前照灯駆動回路９とを備え、前照灯駆動回路９が制御装置１０によって制御される。制御装置１０は、交差点検出部５と配光パターン記憶部１１とに接続され、交差点の検出を契機に前照灯３の配光パターンを切り替え、検出後の交差点が検出前よりも暗く照明されるような制御を行う。   The headlamp 3 includes a shade 7 that forms a light distribution pattern, an actuator 8 that drives the shade 7, and a headlamp drive circuit 9 that controls the actuator 8 and a light source (not shown). The circuit 9 is controlled by the control device 10. The control device 10 is connected to the intersection detection unit 5 and the light distribution pattern storage unit 11, switches the light distribution pattern of the headlamp 3 when the intersection is detected, and the detected intersection is illuminated darker than before the detection. Perform such control.

具体的には、図２、図３に示すように、車両２が交差点Ｃに接近し、交差点検出部５が前照灯３の照明範囲に交差点Ｃを検出すると（Ｓ１１）、制御装置１０は前照灯３の配光パターンを通常配光パターンＰ（図８参照）から限定配光パターンＰ１に切り替える（Ｓ１２）。この限定配光パターンＰ１は、図４に示すように、前照灯３が交差点Ｃの手前（例えば、一時停止線Ｓの近辺）までの領域を限定的に照明するパターンであって、車両２が交差点Ｃに接近するほど車両進行方向の照明距離Ｌが短くなる。   Specifically, as shown in FIGS. 2 and 3, when the vehicle 2 approaches the intersection C and the intersection detection unit 5 detects the intersection C in the illumination range of the headlamp 3 (S11), the control device 10 The light distribution pattern of the headlamp 3 is switched from the normal light distribution pattern P (see FIG. 8) to the limited light distribution pattern P1 (S12). As shown in FIG. 4, the limited light distribution pattern P <b> 1 is a pattern in which the headlamp 3 illuminates a limited area before the intersection C (e.g., near the temporary stop line S). The closer to the intersection C, the shorter the illumination distance L in the vehicle traveling direction.

これにより、一時停止線Ｓまでは明るく照明されるが、それよりも先の領域は暗くなるため、運転者は交差点Ｃの内側およびその先を見通すことが困難となり、車両２の速度を落として、交差点Ｃの手前で停車させる。従って、信号機がなく一時停止義務のある交差点Ｃにおいて、運転者に安全確認を徹底させ、接触または衝突事故を未然に防止することができる。   As a result, the light up to the stop line S is illuminated brightly, but the area ahead of it is darkened, so it becomes difficult for the driver to see inside and beyond the intersection C, and the speed of the vehicle 2 is reduced. Stop before intersection C. Therefore, at the intersection C where there is no traffic light and is obliged to pause, the driver can thoroughly confirm safety and prevent a contact or collision accident.

一方、車両２が停止または停車と同等な速度（例えば５キロメートル毎時）以下まで充分に減速すると、制御装置１０は、車速センサ６の出力に基づいてそれを確認し（図２：Ｓ１３）、前照灯３の配光パターンを限定配光パターンＰ１から拡張配光パターンＰ２に切り替える（Ｓ１４）。拡張配光パターンＰ２は、図５に示すように、車両２が交差点Ｃに進入する直前に、前照灯３が水平方向の照明範囲Ｗを左右に拡張するパターンである。   On the other hand, when the vehicle 2 is sufficiently decelerated to a speed equal to or less than the speed at which the vehicle 2 is stopped or stopped (for example, every 5 kilometers), the control device 10 confirms that based on the output of the vehicle speed sensor 6 (FIG. 2: S13). The light distribution pattern of the lighting 3 is switched from the limited light distribution pattern P1 to the extended light distribution pattern P2 (S14). The extended light distribution pattern P2 is a pattern in which the headlamp 3 extends the horizontal illumination range W right and left immediately before the vehicle 2 enters the intersection C as shown in FIG.

拡張配光パターンＰ２によれば、自車両２の運転者が交差路から交差点Ｃに進入しようとする歩行者Ｍや他車両Ｖを早期に発見することができる。また、車両２が交差点Ｃに進入する直前に、前照灯３の配光パターンを限定配光パターンＰ１から点滅配光パターンに切り替えることもできる（Ｓ１５）。この場合は、前照灯３が発生する点滅光によって、交差路からの歩行者Ｍや他車両Ｖに自車両２を早期に発見させることができる。   According to the extended light distribution pattern P2, the driver of the host vehicle 2 can discover the pedestrian M and the other vehicle V that are about to enter the intersection C from the intersection at an early stage. Further, immediately before the vehicle 2 enters the intersection C, the light distribution pattern of the headlamp 3 can be switched from the limited light distribution pattern P1 to the blinking light distribution pattern (S15). In this case, the flashing light generated by the headlamp 3 can cause the pedestrian M or other vehicle V from the intersection to discover the host vehicle 2 at an early stage.

その後、車両２が交差点Ｃを通過すると、制御装置１０は、カーナビ装置４が提供する自車両２および交差点Ｃの位置情報に基づいて通過を確認し（図２：Ｓ１６）、図６に示すように、前照灯３の配光パターンを拡張配光パターンＰ２または点滅配光パターンから通常配光パターンＰに切り替える（Ｓ１７）。なお、図２に鎖線で示すように、車両２が停止または充分に減速した後に（Ｓ１３）、配光パターンを限定配光パターンＰ１から通常配光パターンＰに直ちに切り替えることも可能である。   Thereafter, when the vehicle 2 passes through the intersection C, the control device 10 confirms the passage based on the position information of the own vehicle 2 and the intersection C provided by the car navigation device 4 (FIG. 2: S16), as shown in FIG. The light distribution pattern of the headlamp 3 is switched from the extended light distribution pattern P2 or the blinking light distribution pattern to the normal light distribution pattern P (S17). As indicated by a chain line in FIG. 2, after the vehicle 2 stops or sufficiently decelerates (S13), the light distribution pattern can be immediately switched from the limited light distribution pattern P1 to the normal light distribution pattern P.

また、前照灯３の照明範囲に交差点Ｃを検出した後に、前照灯３の配光パターンを、図７（ａ）に示す通常走行時のカットラインＰ３から、図７（ｂ）に示す水平方向中央部を切り欠いた凹形カットラインＰ４に切り替えることもできる。凹形カットラインＰ４は、前照灯３が交差点Ｃの内側領域を相対的に暗く、交差点Ｃの側方領域を相対的に明るく照明するような配光パターンを形成する。このため、図３、図４に示す限定配光パターンＰ１と同様の作用効果を期待できる。   Further, after detecting the intersection C in the illumination range of the headlamp 3, the light distribution pattern of the headlamp 3 is shown in FIG. 7 (b) from the cut line P3 during normal travel shown in FIG. 7 (a). It is also possible to switch to the concave cut line P4 in which the horizontal center is cut out. The concave cut line P4 forms a light distribution pattern in which the headlamp 3 illuminates the inner area of the intersection C relatively darkly and illuminates the side area of the intersection C relatively brightly. For this reason, the same effect as the limited light distribution pattern P1 shown in FIG. 3 and FIG. 4 can be expected.

なお、凹形カットラインＰ４を含む配光パターンは、前照灯３のシェード７をアクチュエータ５で傾動またはスライドすることで切り替えることができるほか、クリアランスランプ１２（図１参照）やフォグランプ等の点消灯を制御することで切り替えることもできる。また、車体にカメラを搭載し、カメラで交差点近くの歩行者や他車両を検出したときに、交差点を暗く照明する制御を停止してもよい。その他、本発明は上記実施形態に限定されるものではなく、発明の趣旨を逸脱しない範囲で、配光パターンや灯具の種類を適宜変更して実施することも可能である。   The light distribution pattern including the concave cut line P4 can be switched by tilting or sliding the shade 7 of the headlamp 3 with the actuator 5, as well as points such as a clearance lamp 12 (see FIG. 1) and a fog lamp. It can also be switched by controlling the turn-off. Alternatively, a camera may be mounted on the vehicle body, and control for illuminating the intersection darkly may be stopped when a pedestrian or other vehicle near the intersection is detected by the camera. In addition, the present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing the light distribution pattern and the type of the lamp without departing from the spirit of the invention.

１ 交差点照明システム
２ 車両
３ 前照灯
４ カーナビ装置
５ 交差点検出部
７ シェード
８ アクチュエータ
１０ 制御装置
１１ 配光パターン記憶部
Ｃ 交差点
Ｐ１ 限定配光パターン
Ｐ２ 拡張配光パターン
Ｐ４ 凹形カットライン DESCRIPTION OF SYMBOLS 1 Intersection illumination system 2 Vehicle 3 Headlamp 4 Car navigation system 5 Intersection detection part 7 Shade 8 Actuator 10 Control apparatus 11 Light distribution pattern memory | storage part C Intersection P1 Limited light distribution pattern P2 Extended light distribution pattern P4 Concave cut line

Claims (5)

車両前方を照明する車両用灯具と、車両前方の交差点を検出する検出手段と、交差点を検出してから車両が交差点の手前で停止または充分に減速するまでの期間を通して、交差点の内側領域が検出前よりも暗くなるように、車両用灯具の配光パターンを切り替える制御手段とを備えたことを特徴とする交差点照明システム。 A vehicle lamp that illuminates the front of the vehicle, a detection means that detects an intersection in front of the vehicle , and an area inside the intersection is detected throughout the period from when the intersection is detected until the vehicle stops or sufficiently decelerates before the intersection. An intersection illumination system comprising: control means for switching a light distribution pattern of a vehicular lamp so as to be darker than before. 前記検出手段が交差点を検出してから車両が交差点の手前で停止または充分に減速するまでの期間を通して、車両用灯具が交差点の手前までの領域を限定的に照明するように、制御手段が車両用灯具の配光パターンを切り替える請求項１記載の交差点照明システム。 Throughout the period from the detection means detects the intersection until the vehicle stops or sufficiently decelerated before the intersection, as the vehicle lamp is limited to illuminate an area of up to before the intersection, the control unit vehicle The intersection illumination system according to claim 1, wherein the light distribution pattern of the lamp is switched. 前記検出手段が交差点を検出してから車両が交差点の手前で停止または充分に減速するまでの期間を通して、車両用灯具が交差点の内側領域を相対的に暗く、交差点の側方領域を相対的に明るく照明するように、制御手段が車両用灯具の配光パターンを切り替える請求項１記載の交差点照明システム。 Throughout the period from when the detecting means detects the intersection until the vehicle stops or sufficiently decelerates before the intersection , the vehicular lamp relatively darkens the inner area of the intersection and relatively adjusts the side area of the intersection. The intersection illumination system according to claim 1, wherein the control means switches the light distribution pattern of the vehicular lamp so as to illuminate brightly. 前記車両が交差点に進入する直前に、車両用灯具が水平方向の照明範囲を拡張するように、制御手段が車両用灯具の配光パターンを切り替える請求項１、２または３記載の交差点照明システム。   4. The intersection illumination system according to claim 1, 2 or 3, wherein the control means switches the light distribution pattern of the vehicle lamp so that the vehicle lamp extends the illumination range in the horizontal direction immediately before the vehicle enters the intersection. 前記車両が交差点に進入する直前に、車両用灯具が点滅光を発生するように、制御手段が車両用灯具の配光パターンを切り替える請求項１〜４の何れか一項に記載の交差点照明システム。   The intersection illumination system according to any one of claims 1 to 4, wherein the control means switches the light distribution pattern of the vehicle lamp so that the vehicle lamp generates flashing light immediately before the vehicle enters the intersection. .
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US12096526B2 (en) 2019-08-13 2024-09-17 Mercedes-Benz Group AG Method for controlling a variable light distribution

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