JP3833517B2 - Gaze guidance device - Google Patents

Gaze guidance device Download PDF

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Publication number
JP3833517B2
JP3833517B2 JP2001335087A JP2001335087A JP3833517B2 JP 3833517 B2 JP3833517 B2 JP 3833517B2 JP 2001335087 A JP2001335087 A JP 2001335087A JP 2001335087 A JP2001335087 A JP 2001335087A JP 3833517 B2 JP3833517 B2 JP 3833517B2
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fog
light emitting
light
blue light
red light
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JP2001335087A
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Japanese (ja)
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JP2002201618A (en
Inventor
典弘 池田
敏彦 小川
源治 山本
雅典 永田
幸絵 林
千穂 久保
晃弘 藤田
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Toyoda Gosei Co Ltd
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Toyoda Gosei Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、道路の路肩等に設置される自発光式の視線誘導装置に関し、霧の発生時に有効に視線誘導を行ない得る視線誘導装置に関する。
【0002】
【従来の技術】
近年、道路のカーブ区間の路肩等に、自発光式の視線誘導標が設置される場合があり、この種の視線誘導標は、例えば、特開平10−298935号公報に記載されるように、ランプやLED等の発光器と点滅制御回路を有し、夜間、道路の各走行車線に向けて点滅・発光し、カーブ区間を走行する自動車の運転者に誘導標の光を視認させて、運転者の視線をカーブに沿って誘導するように動作する。
【0003】
【発明が解決しようとする課題】
この種の自発光式の視線誘導標は、夜間等の暗やみで点滅・発光して光を運転者に向けて放射するため、霧や吹雪等の悪天候の際にも、ある程度は運転者に誘導標を視認させ、視線誘導を行なうことができる。
【0004】
しかしながら、光を放射する発光器の発光色が、従来、赤色、オレンジ色、黄色等の赤色系であっても、夜間や昼間に、濃霧が発生して視界が非常に悪化した場合、霧の中で放射される光の色が霧によって散乱し、誘導標の光が運転者に視認されにくくなる問題があった。
【0005】
また、道路上における赤色系の光は、自動車のストップランプ、車幅灯等の光と同様な発光色の光であって、運転者の周辺視野には見慣れた色の光として認識され易く、このために、運転者には、夜間や昼間の濃霧の中での、視線誘導標の赤色系の光を、視線誘導標の光として認識されにくいという問題があった。
【0006】
本発明は、上記の点に鑑みてなされたもので、濃霧発生時のように視界不良の悪天候時においても、確実に視線誘導を行なうことができる視線誘導装置を提供することを目的とする。
【0007】
【課題を解決するための手段】
本発明者らは、視線誘導装置の研究開発にあたり、濃霧発生時を想定した視線誘導装置の視認性の実験を種々の形態で行なった結果、濃霧発生時には、誘導標の光源として、青色系の光を放射する青色系光源が視認性の点から優れていることが判明し、視線誘導装置の光源として青色系光源を使用することが適切であることを見出した。
【0008】
そこで、上記目的を達成する本発明の請求項1の視線誘導装置は、赤色系の光を放射する赤色系発光手段と、青色系の光を放射する青色系発光手段と、周辺環境下の霧の発生を検出しその信号を出力する霧検出手段と、昼夜の別を判定し昼または夜を示す信号を発生する昼夜判定手段と、赤色系発光手段を発光動作させて赤色系の光を放射させ、霧検出手段から霧検出の信号を入力した時、青色系発光手段を発光動作させて青色系の光を放射させるように制御する発光色切替制御手段と、を備え、発光色切替制御手段は、昼夜判別手段から夜を示す信号を入力したとき、赤色系発光手段を発光動作させて赤色系の光を放射させ、霧検出手段から霧検出の信号を入力した時、赤色系発光手段と青色系発光手段を交互に発光動作させ赤色系の光と青色系の光を交互に点滅させることを特徴とする
【0009】
ここで、上記視線誘導装置には、青色系発光手段の発光輝度を制御する輝度制御手段を設けることができ、輝度制御手段は、霧検出手段が霧の濃さを示す信号を出力し、その霧の濃さが増大するに応じて、青色系発光手段の発光輝度を高めるように制御する。
【0010】
また、赤色系発光手段は、視線誘導標のケースの前面に配設された赤色系の光を発光する複数の赤色系発光ダイオードから構成し、青色系発光手段は、ケースの前面に配設された青色系の光を発光する複数の青色系発光ダイオードから構成することができる
【0011】
【作用】
このような構成の視線誘導装置では、発光色切替制御手段は、赤色系発光手段を発光動作させて、道路のカーブ区間等に設置された視線誘導標の前面表示部から、赤色系の光を道路に向けて放射させ、道路を走行する運転者の視線誘導を行なう。
【0012】
また、発光色切替制御手段は、昼夜判別手段から夜を示す信号を入力したとき、赤色系発光手段を発光動作させて赤色系の光を放射させ、霧検出手段から霧検出の信号を入力した時、赤色系発光手段と青色系発光手段を交互に発光動作させ赤色系の光と青色系の光を交互に点滅させて、視線誘導標の前面表示部から赤色系の光と青色系の光を交互に道路に向けて放射させる。
【0013】
これにより、昼間または夜間に濃霧が発生した場合、視線誘導標には、青色系発光手段による青色系の光が点滅・点灯し、道路を走行する運転者には、濃霧の中で青色に発光する視線誘導標を良好に視認させることができる。
【0014】
濃霧の発生時には、青色系の光を放射する青色系光源が視認性の点から優れていることが実験から判明しており、道路を走行する運転者には、夜間や昼間の濃霧の中でも、視線誘導標を良好に視認させ、視線誘導を行なうことができる。さらに、自動車の運転者の視野環境下において、赤色系の光は、自動車のストップランプや車幅灯などのごとく、比較的見慣れた光であり、青色系の光は、運転者の周辺視野には現れにくい新鮮な色の光として、濃霧の中で高い認識度で視認され、良好に視線誘導を行なうことができる。
【0015】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。図1は視線誘導装置における視線誘導標1の正面図を示し、図2はその側面図を示している。視線誘導標1は薄い矩形箱形のケース6を有し、ケース6の前面に矢印形の誘導表示部2が取り付けられる。誘導表示部2は、矢印形に裁断した再帰性反射シート3をケース6の前面に貼着すると共に、その再帰性反射シート3内に多数の2種類の発光ダイオードを矢印形に配置して構成される。
【0016】
2種類の発光ダイオードは、高輝度の青色系発光ダイオード4と赤色系発光ダイオード5とからなり、各々の発光ダイオードの点灯によって、青色系の光の矢印と赤色系の光の矢印が表示できるように、各青色系発光ダイオード4と赤色系発光ダイオード5は、図1のように左右にずらした同レベル位置に各々矢印形に配置される。青色系発光ダイオード4としては、例えばピーク波長を470nmとする青色LED、同波長490nmの青緑色LED、或はその間の波長を持つ青色系光を放射するものが使用可能であり、赤色系発光ダイオード5としては、ピーク波長を623nmとする赤色LED、同波長590nmの黄色LED、或はその間の波長の赤色系光を放射するものが使用可能である。
【0017】
このように構成された視線誘導標1は、図3、図5に示すように、カーブ区間の道路の路肩に沿って立設された支柱9上に固定され、これらの視線誘導標を点灯(点滅)制御する制御回路を内蔵した制御函10がその近傍に設置した支柱上に取り付けられ、その制御函10と各視線誘導標1とは、地下に埋設したケーブル8により接続される。また、支柱の上には霧検出器30が周辺の霧を検出するために設置される。
【0018】
制御函10内の制御回路は、図4に示すように、電源部11、昼夜判別センサ12、昼夜判別部13、点滅制御部14、発光色切替部15、霧判別部16、霧透過レベル判別部20、発光輝度切替部17、及び赤色系点灯部18、青色系点灯部19から構成される。
【0019】
電源部11は、例えば上部に露出して設置された太陽電池とその起電力を充電回路を介して充電する電気二重層コンデンサ等の蓄電体とから構成され、昼間に電力を充電し、夜間に発光用の電力を供給する。昼夜判別センサ12は例えば太陽電池の起電圧を検出する回路またはフォトトランジスタ等から構成され、電圧信号を昼夜判別部13に出力し、昼夜判別部13は昼または夜を示す信号を点滅制御部14に出力する。
【0020】
点滅制御部14は、予め設定された周期のオン・オフ(点灯・消灯)を短時間で繰り返す点滅回路等を内蔵して構成され、上記昼夜判別部13から昼または夜を示す信号を入力すると共に、霧判別部16から送られる霧発生信号を入力し、夜間または霧発生時に、点滅駆動信号を出力する。点滅制御部14の出力側には発光色切替部15が接続される。発光色切替部15は、後述の霧判別部16から出力された霧検出信号を入力し、霧発生時には誘導標の発光色を青色系にまたは青色系と赤色系に切り替えるように構成される。
【0021】
霧検出器30は、例えば、正弦波等の変調信号により点滅発光を行なう主投光部と、その変調光を受光する主受光器と、主受光器の出力をフィルタ回路を通して取り込み、その受光信号を復調する復調回路を備え、復調して得られた受光レベルつまり光の透過率を示す信号を、霧の濃さを示す信号として出力するように構成される。
【0022】
図4に示すごとく、霧検出器30の出力側に接続された霧判別部16は、霧検出器30からの透過レベル信号を入力し、予め設定されたレベル以下の信号を入力したとき、霧の発生を判別し、霧検出信号を点滅制御部14、発光色切替部15に出力する。同様に霧検出器30の出力側に接続された霧透過レベル判別部20は、霧検出器30から透過レベル信号を入力し、霧の濃度を示す信号を発光輝度制御部17に出力する。発光輝度制御部17は発光色切替部15の出力側に接続される。発光色切替部15は、霧のない夜間には発光色を赤色系とし、夜間に霧が発生した場合、発光色を赤色系から青色系に或は赤色系と青色系に切り替えるように動作する。発光色切替部15の一方の出力側は、赤色系点灯部18に接続され、発光色切替部15の他方の出力側は、発光輝度制御部17に接続される。
【0023】
発光輝度制御部17は、発光色切替部15から送られた発光信号の輝度レベルを、霧透過レベル判別部20からの霧の濃さを示す信号に応じて、霧濃度が高い場合、輝度レベルを上げるように、霧濃度が低い場合、輝度レベルを下げるように、制御を行なう。発光輝度制御部17の出力側は、赤色系点灯部18と青色系点灯部19に接続される。赤色系点灯部18の出力側には視線誘導標1に設けた赤色系発光ダイオード5が接続され、赤色系点灯部18は赤色系発光ダイオード5を点灯駆動し、青色系点灯部19の出力側には視線誘導標1に設けた青色系発光ダイオード4が接続され、青色系点灯部19は青色系発光ダイオード4を点灯駆動する。
【0024】
このように構成された視線誘導装置は、昼間には、昼夜判別センサ12、昼夜判別部13から昼間を示す信号が点滅制御部14に送られ、点滅制御回路14は点滅・点灯動作を行なわず、視線誘導標1は点灯しない。夜間になり、昼夜判別センサ12からの検出信号を入力する昼夜判別部13が、夜を示す信号を点滅制御部14に出力すると、点滅制御部14は、点滅・点灯動作を開始し、霧の発生がない場合、視線誘導標1の赤色系発光ダイオード5を点滅・点灯駆動する。複数の視線誘導標1が道路のカーブ区間に沿って配置されている場合、同時に点滅動作させるか、或いはそれらの視線誘導標1をカーブ区間に沿って順に点滅させるリレー点滅を行うこともできる。
【0025】
夜間、暗くなると昼夜判別部13から夜を示す信号が点滅制御部14に送られ、点滅制御部14が点滅動作を開始し、点滅信号を発光色切替部15に出力する。霧の発生がない場合、霧検出器30の検出信号を入力する霧判別部16から霧の発生を示す信号は発光色切替部15に出力されず、発光色切替部15は赤色系点灯部18にのみ点滅駆動信号を出力し、この信号を入力した赤色系点灯部18は、視線誘導標1の赤色系発光ダイオード5を点滅・点灯駆動する。これにより、視線誘導標1の赤色系発光ダイオード5が点滅して、赤色系の光を道路に向けて放射し、運転者の視線を道路に沿って誘導する。
【0026】
一方、夜間或は昼間に霧が発生すると、霧検出器30は、霧の濃さを示す信号として透過レベル信号を霧判別部16と霧透過レベル判別部20に出力し、霧判別部16は予め設定したレベル以下の透過レベル信号を入力した時、霧の検出と判断し、霧検出信号を点滅制御部14と発光色切替部15に出力する。点滅制御部14は、昼夜判別部13から夜信号を入力すると、或は昼信号を入力しかつ霧検出信号を入力すると、点滅・点灯制御を開始する。霧透過レベル判別部20は、霧検出器30から入力する透過レベル信号に基づき、霧の濃度に応じた信号を発光輝度制御部17に出力する。
【0027】
このとき、発光色切替部15は、赤色系点灯部18への点滅駆動信号を、青色系出力側に切り替え、発光輝度制御部17を通して青色系点灯部19に点滅駆動信号を出力する。この信号を入力した青色系点灯部19は視線誘導標1の青色系発光ダイオード4を点滅・点灯駆動し、これにより、視線誘導標1の青色系発光ダイオード4が点滅動作して、青色点滅光を道路に向けて放射する。また、このとき、霧透過レベル判別部20から霧の濃度信号を入力する発光輝度制御部17は、霧が濃い場合、輝度レベルを上げるように、霧が薄い場合、輝度レベルを下げるように、青色系発光ダイオード4の発光輝度レベルを制御する。
【0028】
なお、夜間または昼間の霧の発生時に、視線誘導標1の誘導表示部2に青色系発光ダイオード4を点灯させたが、赤色系発光ダイオード5と青色系発光ダイオード4の両方を同時に点滅又は交互に点滅させてもよく、赤色系発光ダイオード5の赤色系光と青色系発光ダイオード4の青色系光は、濃霧の中で共に良好な視認性を出すことができる。
【0029】
このように、赤色系発光ダイオード5と青色系発光ダイオード4の両方を同時に又は交互に点滅させる場合、図6に示す視線誘導標41のように、赤色系発光ダイオード5と青色系発光ダイオード4を、誘導表示部2の矢印の前部と後部に分けて配置し、両者の発光色の混合を防止するとよい。
【0030】
また、図7(a)に示す視線誘導標51のように、赤色系発光ダイオード5を誘導表示部の全部と後部に分けて配置し、中央部に青色系発光ダイオード4を配置することもでき、また図7(b)に示す視線誘導標61のように、青色系発光ダイオード4を誘導表示部の全部と後部に分けて配置し、中央部に赤色系発光ダイオード5を配置することもできる。さらに、図7(c)に示す視線誘導標71のように、矢印の誘導表示部の各行において、赤色系発光ダイオード5の列と青色系発光ダイオード4の列を交互に配置することもできる。この場合も上記と同様に、赤色系発光ダイオード5と青色系発光ダイオード4は両方を同時に点滅させ又は交互に点滅させ若しくはリレー点滅させて、発光色の混合を防止する。
【0031】
図8は、濃霧発生時を想定して行なった視線誘導装置の視認性の実験結果を示している。この実験では、夜間を想定した暗い室内に霧を噴射して濃霧を発生させ、この中に赤色、黄色、黄緑色、緑色、青色、白色の各発光ダイオードの視線誘導標を設置し、そこから15m離れた位置に10人の被験者を位置させる。そして、濃霧の濃度が徐々に低下し光透過率が徐々に上昇して、被験者が各発光ダイオードの光を見え始める時の霧透過率(霧の中での光の透過率)を測定した。
【0032】
図8のグラフは、その際の10人の被験者が見え始める際の霧透過率の平均値を、各視線誘導標の発光色(赤色、黄色、黄緑色、緑色、青色、白色)について、棒グラフで示している。この図8のグラフから、夜間の濃霧環境においては、視線誘導標の発光手段に赤色と青色の発光ダイオードを使用した場合、他の色の発光ダイオードに比べ、有意義にその視認性が優れていることが解る。
【0033】
このように、霧の発生時には、視線誘導標1の青色系発光ダイオード4が或は青色系発光ダイオード4と赤色系発光ダイオード5が点滅・点灯し、青色系の光或は青色系の光と赤色系の光が霧の中に放射されるから、濃霧の中であっても、道路を走行する自動車の運転者は視線誘導標を良好に視認することができる。
【0034】
さらに、図9は、濃霧発生時を想定して行なった視線誘導装置の存在認知と形状認知の実験結果を示している。この実験では、夜間を想定した暗い室内に霧を噴射して濃霧を発生させ、この中に赤色と青色の各発光ダイオードの視線誘導標を設置し、そこから20m離れた位置に被験者OとYを位置させる。そして、濃霧の濃度が徐々に低下し光透過率が徐々に上昇して、被験者OとYが各発光ダイオードの視線誘導標の存在を認知し始める時とその視線誘導標の形状を認知し始める時の霧透過率(霧の中での光の透過率)を測定した。その実験結果は、以下の表1及びそれをグラフ化した図9に示すようになった。
【0035】
【表1】

Figure 0003833517
この表1と図9のグラフから、夜間の濃霧環境において、存在認知つまり視線誘導標を認知する点に関して、青色系発光ダイオードを使用した視線誘導標が、赤色系発光ダイオードを使用したものに比べ、より光透過率が低いつまり濃霧の濃い状態で、その存在を認知できることが解る。
【0036】
また、形状認知つまり視線誘導標の形を認知する点に関しては、赤色系発光ダイオードを使用した視線誘導標が、青色系発光ダイオードを使用したものに比べ、より光透過率が低い状態つまり濃霧の濃い状態で、その形状を認知できることが解る。
【0037】
このような実験結果から、青色系発光ダイオードと赤色系発光ダイオードを使用した視線誘導標では、夜間の濃霧において、その見え方に有意義な違いが存在し、青色系発光ダイオードは存在認知性に優れ、赤色系発光ダイオードは形状認知性に優れていることが判明した。
【0038】
ところで、自動車の運転時における運転者の視野環境下では、自動車のストップランプや車幅灯などのように、赤色系の光が一般的である。このために、高輝度の青色系発光ダイオードから放射された青色系の光は、運転者の周辺視野には現れにくい新鮮な色の光として、濃霧の中でも高い認識度で視認され、運転者の視線を道路に沿って良好に誘導することができる。
【0039】
なお、上記実施例では、視線誘導標として、矩形ケースの前面に矢印形の誘導表示部を設けた構造のものを使用したが、円盤形のケースの前面に合成樹脂製の多数のダイヤモンドカット部を設けた反射部を有する構造の視線誘導標を使用することもできる。
【0040】
また、上記実施例では、夜間の霧発生時に、赤色系発光ダイオード5を青色系発光ダイオード4の点滅に切り替えているが、夜間の霧発生時、赤色系発光ダイオードの点滅に加えて青色系発光ダイオードの点滅を行うようにしてもよい。また、この場合の赤色系発光ダイオード5と青色系発光ダイオード4の点滅は、同時に行うようにしても、交互に行うようにしてもよい。
【0041】
さらに、上記実施例では、昼夜判別部を設けて昼夜の判別をおこなったが、昼夜判別部を設けずに、赤色系の光を昼夜発光させ、霧検出器が霧を検出したとき、青色系の光を発光させるようにすることもできる。
【0042】
【発明の効果】
以上説明したように、本発明の視線誘導装置によれば、霧の発生時に、青色系の光或は青色系の光と赤色系の光を発光させて視線誘導を行なうから、道路を走行する自動車の運転者には、霧の中でも、視線誘導標を良好に視認させることができる。また、自動車の運転時における運転者の視野環境下においては、自動車のストップランプや車幅灯などのように、赤色系の光が見慣れた光であり、青色系の光は、運転者の周辺視野には現れにくい新鮮な色の光として、濃霧の中でも高い認識度でその存在が認知され、良好に視線誘導を行なうことができる。
【図面の簡単な説明】
【図1】本発明の一実施形態を示す視線誘導標1の正面図である。
【図2】同視線誘導標1の右側面図である。
【図3】道路に設置された視線誘導標装置の正面図である。
【図4】視線誘導装置のブロック図である。
【図5】道路に設置された視線誘導標装置の斜視図である。
【図6】他の実施例の視線誘導標の正面図である。
【図7】(a)(b)(c)はさらに他の実施例の視線誘導標の正面図である。
【図8】霧の中で被験者が視線誘導標を視認する実験結果のグラフを示し、各発光色に対する被験者が見え始める時の霧透過率(霧の中での光の透過率)の平均値を示すグラフである。
【図9】霧の中で被験者が視線誘導標を視認する実験結果のグラフを示し、(a)は青色系発光ダイオードと赤色系発光ダイオードの誘導標について被験者Oがその存在を認知し始める時とその形状を認知し始める時の光透過率を示すグラフ、(b)は同様の誘導表を被験者Yがその存在を認知し始める時とその形状を認知し始める時の光透過率を示すグラフである。
【符号の説明】
1−視線誘導標
4−青色系発光ダイオード
5−赤色系発光ダイオード
13−昼夜判別部
14−点滅制御部
15−発光色切替部
17−発光輝度制御部
30−霧検出器[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a self-luminous gaze guidance device installed on a road shoulder or the like, and more particularly to a gaze guidance device capable of performing gaze guidance effectively when fog occurs.
[0002]
[Prior art]
In recent years, a self-luminous gaze guidance mark may be installed on the shoulder of a curve section of a road, and this type of gaze guidance mark is described in, for example, JP-A-10-298935, It has a light-emitting device such as a lamp and LED and a blinking control circuit, and it blinks and emits light toward each lane on the road at night, allowing the driver of the car traveling in the curve section to see the light of the guidance mark and driving It operates to guide the person's line of sight along the curve.
[0003]
[Problems to be solved by the invention]
This type of self-luminous gaze guidance light flashes and emits light in the dark at night and emits light toward the driver, so it is guided to the driver to some extent even in bad weather such as fog and snowstorms. The target can be visually recognized, and the line of sight can be guided.
[0004]
However, even if the emission color of the light emitter emitting light is conventionally red, such as red, orange, yellow, etc. There was a problem that the color of the light radiated therein was scattered by fog and the light of the guide mark was difficult to be seen by the driver.
[0005]
In addition, red light on the road is light of the same emission color as that of a stop lamp of a car, a width lamp, etc., and is easily recognized as a familiar color light in the driver's peripheral vision, For this reason, the driver has a problem that the red light of the line-of-sight guide mark in night or daytime dense fog is difficult to recognize as the light of the line-of-sight guide mark.
[0006]
The present invention has been made in view of the above points, and an object of the present invention is to provide a line-of-sight guidance apparatus that can reliably perform line-of-sight guidance even in bad weather with poor visibility such as when fog is generated.
[0007]
[Means for Solving the Problems]
As a result of conducting various experiments on the visibility of the gaze guidance device assuming the occurrence of dense fog in the research and development of the gaze guidance device, the inventors of the present invention, as a light source of the guidance mark, It has been found that a blue light source that emits light is superior from the viewpoint of visibility, and it has been found that it is appropriate to use a blue light source as a light source of a visual line guidance device.
[0008]
Accordingly, the line-of-sight guidance apparatus according to claim 1 of the present invention that achieves the above object includes a red light emitting means that emits red light, a blue light emitting means that emits blue light, and a fog in the surrounding environment. Fog detection means that detects the occurrence of light and outputs the signal, day / night judgment means that determines whether the day is night or day and generates a signal indicating the day or night, and red light emitting means to emit light and emit red light And a light emission color switching control means for controlling the blue light emitting means to emit light and emit blue light when a fog detection signal is input from the fog detecting means. When the signal indicating the night is input from the day / night discrimination means, the red light emitting means is caused to emit light to emit red light, and when the fog detection signal is input from the fog detecting means, the red light emitting means The blue light-emitting means emit light alternately and red light Wherein the blink light color system alternately.
[0009]
Here, the line-of-sight guidance device can be provided with a brightness control means for controlling the light emission brightness of the blue light emitting means, and the brightness control means outputs a signal indicating the fog density, As the fog density increases, control is performed to increase the light emission luminance of the blue light emitting means.
[0010]
The red light emitting means is composed of a plurality of red light emitting diodes that emit red light disposed on the front surface of the case of the line-of-sight guide, and the blue light emitting means is disposed on the front surface of the case. It can be composed of a plurality of blue light emitting diodes that emit blue light.
[Action]
In the line-of-sight guidance device having such a configuration, the light emission color switching control means causes the red light-emitting means to emit light and emits red light from the front display part of the line-of-sight guide mark installed in a curve section or the like of the road. Radiating towards the road to guide the driver's line of sight on the road.
[0012]
Further, when the signal indicating the night is input from the day / night discriminating means , the light emission color switching control means causes the red light emitting means to emit light to emit red light, and receives the fog detection signal from the fog detecting means. When the red light emitting means and the blue light emitting means are operated to emit light alternately, the red light and the blue light are alternately blinked, and the red light and the blue light are displayed from the front display portion of the line-of-sight guide. Alternately radiate toward the road.
[0013]
As a result, when dense fog occurs in the daytime or at night, blue light emitted from the blue light emitting means blinks and lights on the line-of-sight guide, and blue light is emitted to the driver traveling on the road in blue. It is possible to make the line-of-sight guide mark to be viewed well.
[0014]
Experiments have shown that a blue light source that emits blue light is superior in terms of visibility when dense fog occurs, and for drivers traveling on the road, The line-of-sight guidance mark can be viewed well and the line-of-sight can be guided. Furthermore, in the visual environment of the driver of a car, red light is a relatively familiar light, such as a car stop lamp or width light, and blue light is in the peripheral vision of the driver. As a fresh color light that is difficult to appear, it is visually recognized with a high degree of recognition in the dense fog, and the line of sight can be guided well.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a front view of a gaze guidance mark 1 in the gaze guidance device, and FIG. 2 shows a side view thereof. The line-of-sight guidance mark 1 has a thin rectangular box-shaped case 6, and an arrow-shaped guidance display unit 2 is attached to the front surface of the case 6. The guidance display unit 2 is configured by adhering a retroreflective sheet 3 cut into an arrow shape to the front surface of the case 6 and arranging a large number of two types of light emitting diodes in the retroreflective sheet 3 in an arrow shape. Is done.
[0016]
The two types of light-emitting diodes are composed of a high-intensity blue light-emitting diode 4 and a red light-emitting diode 5, and a blue light arrow and a red light arrow can be displayed by lighting each light-emitting diode. In addition, the blue light emitting diodes 4 and the red light emitting diodes 5 are arranged in the form of arrows at the same level positions shifted left and right as shown in FIG. As the blue light-emitting diode 4, for example, a blue LED having a peak wavelength of 470 nm, a blue-green LED having the same wavelength of 490 nm, or a device emitting blue light having a wavelength in between can be used. For example, a red LED having a peak wavelength of 623 nm, a yellow LED having the same wavelength of 590 nm, or a light emitting red light having a wavelength in between can be used.
[0017]
As shown in FIGS. 3 and 5, the line-of-sight guide 1 constructed in this way is fixed on a column 9 erected along the road shoulder of the curve section, and these line-of-sight guides are lit ( Blink) A control box 10 containing a control circuit to be controlled is mounted on a support column installed in the vicinity thereof, and the control box 10 and each line-of-sight guide 1 are connected by a cable 8 buried underground. Further, a fog detector 30 is installed on the support column in order to detect surrounding fog.
[0018]
As shown in FIG. 4, the control circuit in the control box 10 includes a power supply unit 11, a day / night discrimination sensor 12, a day / night discrimination unit 13, a blinking control unit 14, a light emission color switching unit 15, a fog discrimination unit 16, and a fog transmission level discrimination. A unit 20, a light emission luminance switching unit 17, a red lighting unit 18, and a blue lighting unit 19.
[0019]
The power supply unit 11 is composed of, for example, a solar cell that is exposed at the top and a power storage unit such as an electric double layer capacitor that charges its electromotive force through a charging circuit. Supply power for light emission. The day / night discrimination sensor 12 includes, for example, a circuit for detecting an electromotive voltage of a solar cell or a phototransistor, and outputs a voltage signal to the day / night discrimination unit 13. The day / night discrimination unit 13 blinks a signal indicating day or night. Output to.
[0020]
The blinking control unit 14 includes a blinking circuit that repeats ON / OFF (lighting / extinguishing) in a preset period in a short time, and receives a signal indicating day or night from the day / night discrimination unit 13. At the same time, a fog generation signal sent from the fog determination unit 16 is input, and a blinking drive signal is output at night or when fog occurs. A light emission color switching unit 15 is connected to the output side of the blinking control unit 14. The light emission color switching unit 15 is input with a fog detection signal output from a fog determination unit 16 described later, and is configured to switch the light emission color of the guidance mark to a blue system or a blue system and a red system when fog occurs.
[0021]
The fog detector 30 is, for example, a main light projecting unit that emits blinking light by a modulation signal such as a sine wave, a main light receiver that receives the modulated light, and an output of the main light receiver through a filter circuit, and receives the light reception signal. And a signal indicating the received light level, that is, the light transmittance obtained by the demodulation, is output as a signal indicating the fog density.
[0022]
As shown in FIG. 4, when the fog determination unit 16 connected to the output side of the fog detector 30 inputs a transmission level signal from the fog detector 30 and inputs a signal equal to or lower than a preset level, The fog detection signal is output to the blinking control unit 14 and the emission color switching unit 15. Similarly, the fog transmission level determination unit 20 connected to the output side of the fog detector 30 receives the transmission level signal from the fog detector 30 and outputs a signal indicating the fog density to the light emission luminance control unit 17. The light emission luminance control unit 17 is connected to the output side of the light emission color switching unit 15. The light emission color switching unit 15 operates so as to change the light emission color to red during night when there is no fog, and to switch the light emission color from red to blue or from red to blue when fog occurs at night. . One output side of the emission color switching unit 15 is connected to the red lighting unit 18, and the other output side of the emission color switching unit 15 is connected to the emission luminance control unit 17.
[0023]
The light emission luminance control unit 17 determines the luminance level of the light emission signal sent from the light emission color switching unit 15 when the fog concentration is high according to the signal indicating the fog density from the fog transmission level determination unit 20. When the fog density is low, control is performed so as to decrease the brightness level. The output side of the light emission luminance control unit 17 is connected to a red lighting unit 18 and a blue lighting unit 19. The red light emitting diode 5 provided in the line-of-sight guide 1 is connected to the output side of the red light emitting unit 18, and the red light emitting unit 18 drives the red light emitting diode 5 to light and outputs the blue light emitting unit 19. Is connected to the blue light emitting diode 4 provided in the line-of-sight guide 1, and the blue light emitting unit 19 drives the blue light emitting diode 4 to light.
[0024]
In the line-of-sight guidance device configured as described above, signals indicating daytime are sent from the day / night discrimination sensor 12 and the day / night discrimination unit 13 to the flashing control unit 14 during the daytime, and the flashing control circuit 14 does not perform the flashing / lighting operation. The line-of-sight guide 1 is not lit. At night, when the day / night discrimination unit 13 that inputs the detection signal from the day / night discrimination sensor 12 outputs a signal indicating the night to the flashing control unit 14, the flashing control unit 14 starts the flashing / lighting operation, When there is no occurrence, the red light emitting diode 5 of the line-of-sight guide 1 is blinked and lit. When a plurality of line-of-sight guidance marks 1 are arranged along the curve section of the road, it is also possible to perform blinking operation at the same time, or to perform relay blinking that causes these line-of-sight guidance marks 1 to blink sequentially along the curve section.
[0025]
When it becomes dark at night, a signal indicating the night is sent from the day / night discrimination unit 13 to the blinking control unit 14, and the blinking control unit 14 starts the blinking operation, and outputs the blinking signal to the emission color switching unit 15. When no fog is generated, a signal indicating the generation of fog is not output to the emission color switching unit 15 from the fog determination unit 16 that inputs the detection signal of the fog detector 30, and the emission color switching unit 15 is the red-based lighting unit 18. The red lighting unit 18 that outputs the blinking drive signal only to the light source and blinks and lights up the red light emitting diode 5 of the line-of-sight guide 1. As a result, the red light-emitting diode 5 of the line-of-sight guide 1 blinks, radiates red light toward the road, and guides the driver's line of sight along the road.
[0026]
On the other hand, when fog occurs at night or in the daytime, the fog detector 30 outputs a transmission level signal to the fog determination unit 16 and the fog transmission level determination unit 20 as a signal indicating the fog density, and the fog determination unit 16 When a transmission level signal equal to or lower than a preset level is input, it is determined that fog is detected, and the fog detection signal is output to the blinking control unit 14 and the emission color switching unit 15. When the night signal is input from the day / night discrimination unit 13 or when the day signal is input and the fog detection signal is input, the flashing control unit 14 starts the flashing / lighting control. The fog transmission level determination unit 20 outputs a signal corresponding to the fog density to the light emission luminance control unit 17 based on the transmission level signal input from the fog detector 30.
[0027]
At this time, the emission color switching unit 15 switches the blinking drive signal to the red lighting unit 18 to the blue output side, and outputs the blinking driving signal to the blue lighting unit 19 through the light emission luminance control unit 17. The blue light-emitting unit 19 to which this signal is input blinks / lights the blue light-emitting diode 4 of the line-of-sight guide 1 so that the blue light-emitting diode 4 of the line-of-sight guide 1 blinks, and the blue blinking light is emitted. To the road. At this time, the light emission luminance control unit 17 that inputs the fog density signal from the fog transmission level determination unit 20 increases the luminance level when the fog is thick, and decreases the luminance level when the fog is thin. The light emission luminance level of the blue light emitting diode 4 is controlled.
[0028]
The blue light emitting diode 4 is lit on the guidance display unit 2 of the line-of-sight guide 1 at the time of occurrence of fog at night or in the daytime, but both the red light emitting diode 5 and the blue light emitting diode 4 blink simultaneously or alternately. The red light of the red light-emitting diode 5 and the blue light of the blue light-emitting diode 4 can both have good visibility in the dense fog.
[0029]
As described above, when both the red light emitting diode 5 and the blue light emitting diode 4 are blinked simultaneously or alternately, the red light emitting diode 5 and the blue light emitting diode 4 are connected like the line-of-sight guide 41 shown in FIG. The guidance display unit 2 may be arranged separately at the front part and the rear part of the arrow to prevent mixing of the emission colors of the two.
[0030]
Further, as shown in the line-of-sight guide 51 shown in FIG. 7A, the red light-emitting diodes 5 can be arranged separately for the entire guidance display part and the rear part, and the blue light-emitting diodes 4 can be arranged in the center part. Further, as shown in the line-of-sight guide 61 shown in FIG. 7B, the blue light-emitting diode 4 can be divided into the entire guidance display part and the rear part, and the red light-emitting diode 5 can be arranged in the center part. . Furthermore, like the line-of-sight guide 71 shown in FIG. 7C, the columns of the red light-emitting diodes 5 and the columns of the blue light-emitting diodes 4 can be alternately arranged in each row of the arrow guide display unit. Also in this case, as described above, the red light emitting diode 5 and the blue light emitting diode 4 are both blinked simultaneously or alternately blinking or relay blinking to prevent emission color mixing.
[0031]
FIG. 8 shows the result of an experiment on the visibility of the line-of-sight guidance device that was performed assuming the occurrence of dense fog. In this experiment, fog is injected into a dark room assuming nighttime to generate dense fog, in which red, yellow, yellow-green, green, blue, and white light-emitting diode gaze guidance marks are installed, and from there Ten subjects are located at a position 15 m away. Then, the fog transmittance (light transmittance in the fog) was measured when the concentration of the fog gradually decreased and the light transmittance gradually increased, and the subject started to see the light of each light emitting diode.
[0032]
The graph of FIG. 8 is a bar graph showing the average value of fog transmittance when 10 subjects at that time start to see for the emission colors (red, yellow, yellow green, green, blue, white) of each gaze guidance mark. Is shown. From the graph of FIG. 8, in the dark fog environment at night, when red and blue light emitting diodes are used as the light emitting means of the line-of-sight guide, the visibility is significantly superior to the light emitting diodes of other colors. I understand that.
[0033]
Thus, when fog occurs, the blue light emitting diode 4 of the line-of-sight guide 1 or the blue light emitting diode 4 and the red light emitting diode 5 blinks and lights up, and the blue light or the blue light is emitted. Since red light is emitted in the fog, the driver of the automobile traveling on the road can visually recognize the line-of-sight guide mark even in the dense fog.
[0034]
Furthermore, FIG. 9 shows experimental results of presence recognition and shape recognition of the line-of-sight guidance device that were performed assuming the occurrence of dense fog. In this experiment, fog is injected into a dark room assuming nighttime to generate dense fog, in which red and blue light-emitting diode line-of-sight guides are installed, and subjects O and Y are located 20 m away from them. Position. Then, when the concentration of fog is gradually decreased and the light transmittance is gradually increased, the subjects O and Y start to recognize the presence of the line-of-sight guide mark of each light-emitting diode and start to recognize the shape of the line-of-sight guide mark. The fog transmittance at the time (light transmittance in the fog) was measured. The experimental results are as shown in Table 1 below and FIG.
[0035]
[Table 1]
Figure 0003833517
From the graphs in Table 1 and FIG. 9, regarding the point of recognizing presence, that is, recognizing the gaze guidance mark in the dense fog environment at night, the gaze guidance mark using the blue light emitting diode is compared with the one using the red light emitting diode. It can be seen that its presence can be recognized in a state where the light transmittance is lower, that is, in a dense fog.
[0036]
In terms of shape recognition, that is, recognition of the shape of the gaze guidance mark, the gaze guidance mark using the red light emitting diode has a lower light transmittance than that using the blue light emitting diode, i.e. It can be seen that the shape can be recognized in a dark state.
[0037]
From these experimental results, there is a significant difference in the way that the line-of-sight guide signs using blue light-emitting diodes and red light-emitting diodes look at nighttime in dense fog, and blue light-emitting diodes have excellent cognition. The red light-emitting diode was found to have excellent shape recognition.
[0038]
By the way, in the driver's visual field environment when driving a car, red light is generally used, such as a stop lamp or a width lamp of a car. For this reason, the blue light emitted from the high-intensity blue light-emitting diode is recognized as a fresh color light that is difficult to appear in the driver's peripheral visual field with a high degree of recognition even in dense fog. The line of sight can be guided well along the road.
[0039]
In the above embodiment, the line-of-sight guide has a structure in which an arrow-shaped guide display is provided on the front surface of the rectangular case, but a large number of synthetic resin diamond cut portions are formed on the front surface of the disk-shaped case. It is also possible to use a line-of-sight guide having a structure having a reflecting portion provided with the
[0040]
Further, in the above embodiment, the red light emitting diode 5 is switched to the blinking of the blue light emitting diode 4 when night fog occurs, but when the fog at night occurs, in addition to the blinking of the red light emitting diode, blue light emission is performed. The diode may be blinked. In this case, the red light emitting diode 5 and the blue light emitting diode 4 may be blinked at the same time or alternately.
[0041]
Further, in the above embodiment, the day / night discriminating unit is provided and the day / night discriminating is performed, but without providing the day / night discriminating unit, when the red light is emitted day and night and the fog detector detects the fog, the blue system This light can also be emitted.
[0042]
【The invention's effect】
As described above, according to the line-of-sight guidance device of the present invention, when fog occurs, blue-type light or blue-type light and red-type light are emitted to guide the line-of-sight, and thus travel on the road. The driver of the automobile can make the line-of-sight guide well visible in the fog. In addition, under the driver's field of view when driving a car, red light is familiar light, such as stop lights and width lights of cars, and blue light is around the driver. As a fresh color light that hardly appears in the field of view, its presence is recognized with a high degree of recognition even in dense fog, and the line of sight can be guided well.
[Brief description of the drawings]
FIG. 1 is a front view of a gaze guidance mark 1 showing an embodiment of the present invention.
FIG. 2 is a right side view of the same-sight line guidance mark 1. FIG.
FIG. 3 is a front view of a line-of-sight guidance device installed on a road.
FIG. 4 is a block diagram of a line-of-sight guidance device.
FIG. 5 is a perspective view of a gaze guidance device installed on a road.
FIG. 6 is a front view of a gaze guidance mark according to another embodiment.
7A, 7B, and 7C are front views of a line-of-sight guide according to still another embodiment.
FIG. 8 shows a graph of experimental results in which the subject visually recognizes the gaze guidance mark in the fog, and the average value of the fog transmittance (light transmittance in the fog) when the subject starts to see for each emission color It is a graph which shows.
FIG. 9 shows a graph of an experimental result in which a subject visually recognizes a gaze guidance mark in fog. FIG. 9A shows a time when the subject O starts to recognize the presence of a blue light emitting diode and a red light emitting diode guiding mark. And a graph showing the light transmittance when starting to recognize its shape, (b) is a graph showing the light transmittance when the subject Y starts to recognize the presence of the same induction table and when the shape starts to recognize the shape It is.
[Explanation of symbols]
1-Gaze guidance mark 4-Blue light emitting diode 5-Red light emitting diode 13-Day / night discrimination unit 14-Flashing control unit 15-Luminescent color switching unit 17-Light emission luminance control unit 30-Fog detector

Claims (4)

赤色系の光を放射する赤色系発光手段と、
青色系の光を放射する青色系発光手段と、
周辺環境下の霧の発生を検出しその信号を出力する霧検出手段と、
昼夜の別を判定し昼または夜を示す信号を発生する昼夜判定手段と、
該赤色系発光手段を発光動作させて赤色系の光を放射させ、該霧検出手段から霧検出の信号を入力した時、該青色系発光手段を発光動作させて青色系の光を放射させるように制御する発光色切替制御手段と、
を備え、
前記発光色切替制御手段は、該昼夜判別手段から夜を示す信号を入力したとき、赤色系発光手段を発光動作させて赤色系の光を放射させ、前記霧検出手段から霧検出の信号を入力した時、前記赤色系発光手段と前記青色系発光手段を交互に発光動作させ赤色系の光と青色系の光を交互に点滅させることを特徴とする視線誘導装置。
A red light emitting means for emitting red light;
Blue light emitting means for emitting blue light;
Fog detection means for detecting the generation of fog in the surrounding environment and outputting the signal;
Day / night determination means for determining whether day or night and generating a signal indicating day or night,
The red light emitting means is caused to emit light to emit red light, and when the fog detection signal is input from the fog detecting means, the blue light emitting means is caused to emit light to emit blue light. Luminescent color switching control means to control,
With
The light emission color switching control means, when receiving a signal indicating the night from the day / night discrimination means, causes the red light emission means to emit light to emit red light, and inputs a fog detection signal from the fog detection means. In this case, the line-of-sight guidance apparatus is characterized in that the red light emitting means and the blue light emitting means are caused to emit light alternately, and the red light and the blue light are alternately blinked .
前記霧検出手段が霧の濃さを示す信号を出力し、該霧の濃さが増大するに応じて、前記青色系発光手段の発光輝度を高めるように制御する輝度制御手段が設けられたことを特徴とする請求項1記載の視線誘導装置。  The fog detecting means outputs a signal indicating the fog density, and a luminance control means is provided for controlling the emission luminance of the blue light emitting means to increase as the fog density increases. The line-of-sight guidance device according to claim 1. 前記霧検出手段が霧の濃さを示す信号を出力し、該霧の濃さが増大するに応じて、前記青色系発光手段と赤色系発光手段の発光輝度を高めるように制御する輝度制御手段が設けられたことを特徴とする請求項記載の視線誘導装置。Luminance control means for outputting a signal indicating the fog density from the fog detecting means, and controlling to increase the emission luminance of the blue light emitting means and the red light emitting means as the fog density increases. The line-of-sight guidance device according to claim 1, further comprising: 前記赤色系発光手段は、視線誘導標のケースの前面に配設された赤色系の光を発光する複数の赤色系発光ダイオードからなり、前記青色系発光手段は、該ケースの前面に配設された青色系の光を発光する複数の青色系発光ダイオードからなることを特徴とする請求項1、2又は3記載の視線誘導装置。The red light emitting means is composed of a plurality of red light emitting diodes that emit red light disposed on the front surface of the visual guidance indicator case, and the blue light emitting means is disposed on the front surface of the case. 4. The line-of-sight guidance device according to claim 1 , comprising a plurality of blue light emitting diodes that emit blue light.
JP2001335087A 2000-11-06 2001-10-31 Gaze guidance device Expired - Fee Related JP3833517B2 (en)

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JP2004318684A (en) * 2003-04-18 2004-11-11 Kictec Inc Guidance display device for outdoor use
JP2005273267A (en) * 2004-03-24 2005-10-06 Sekisui Jushi Co Ltd Spontaneous emitting delineator facility
KR100826612B1 (en) 2007-01-17 2008-05-02 주식회사 화성조명 Illumination fixtures for roadway
JP5558169B2 (en) * 2010-03-30 2014-07-23 株式会社キクテック Self-luminous gaze guidance mark
JP5426450B2 (en) * 2010-03-30 2014-02-26 株式会社キクテック Self-luminous gaze guidance mark
KR101846990B1 (en) 2016-12-29 2018-04-09 주식회사 래도 Road information display device
KR102409589B1 (en) * 2022-03-28 2022-06-22 (주)데코엘 Road guide sign board easy to replacement and installation

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