JP4737578B2

JP4737578B2 - Sighting device for security sensor device

Info

Publication number: JP4737578B2
Application number: JP2001079468A
Authority: JP
Inventors: 祐幸池田
Original assignee: Optex Co Ltd
Current assignee: Optex Co Ltd
Priority date: 2001-03-19
Filing date: 2001-03-19
Publication date: 2011-08-03
Anticipated expiration: 2021-03-19
Also published as: JP2002279539A

Description

【０００１】
【発明の属する技術分野】
本発明は、投光部の投光素子から出射する赤外線ビームを受光部の受光素子で受光し、この赤外線ビームを人体等が遮断したときに警報信号を発する防犯用センサ装置に関するものである。
【０００２】
【従来の技術】
この種の防犯用センサ装置は、直線的な警戒区域の両端部に、赤外線投光部の投光器と赤外線受光部の受光器とが、これらの光軸を一致させた配置で設置されており、直線的な近距離から数百ｍの長距離までの警戒区域を設定できるので、長距離になる程、投光器と受光器間での光軸を正確に一致させるのが難しくなる。そこで、従来の防犯用センサ装置には、図６に示すような照準器が投光器および受光器にそれぞれ設けられており、センサ装置の設置またはメンテナンスに際しては前記照準器によって光軸合わせするようになっている。
【０００３】
前記照準器５０は、一対の接眼窓５１と、一対の対物窓５２と、両５１，５２間で照準軸５４上に配置された一対の照準ミラー５３とを備えている。この照準器５０を用いた光軸調整では、左右の何れか一方の接眼窓５１を覗きながら、ダイヤルや調整ねじを操作して投光器または受光器の向きを上下左右に動かして、照準ミラー５３に映る受光器または投光器の像が対物窓５２の中央にくるように調整する。この照準器５９による光軸合わせは粗調整であるので、この粗調整を行ったのちに、受光部のレベルメータの表示を見ながら表示レベルが最大値になるようダイヤルや調整ねじを操作して光軸の粗調整を行い、レベルメータの表示が所定レベル以上になるまで、つまり投光器と受光器との間で光軸が正確に一致するまで、光軸の微調整を繰り返す。
【０００４】
【発明が解決しようとする課題】
ところで、前記照準器５０では、図６（ａ）に示すように、目の位置を接眼窓５１に近づけると、視野が広くなって照準ミラー５３に映っている像の全体を見ることができるので、照準を粗く合わせるのには都合がよいが、その反面、接眼窓５１の中心に位置する像を特定し難い。一方、図６（ｂ）に示すように、目の位置を接眼窓５１から遠ざけると、接眼窓５１の中心に位置する像を特定し易いが、視野が狭くなるために、相手の投光器または受光器の位置が照準軸から大きくずれていると、その像が写らないために光軸合わせが難くなる。
【０００５】
そこで、従来では、先ず、（ａ）に示すように、目を接眼窓５１に近づて覗きながら、ダイヤルまたは調整ねじを操作して投光部または受光部の像が照準ミラー５３に映るように調整する。そののち、（ｂ）に示すように、目を遠ざけて所要の像が照準ミラー５３の中央にくるように調整したのち、再び目を接眼窓５１に近づけて照準ミラー５３に映っているのが所要の像であるのを確認する。このように、従来の照準器５０による光軸合わせでは、目の位置を接眼窓５１に対し一定の相対方向となるように保ちながら、目を接眼窓５１に対し接離する方向に複数回往復移動させて、その都度ダイヤルおよび調整ねじの操作を行って所要の像が照準ミラー５３の中央にくるように調整しなければならないので、光軸合わせ作業が難しく、その作業に時間を要する。
【０００６】
本発明は、前記従来の課題に鑑みてなされたもので、目を一定位置に固定させて接眼窓を覗きながら光軸調整を行うことのできる防犯用センサ装置の照準器を提供することを目的とするものである。
【０００７】
【課題を解決するための手段】
上記目的を達成するために、本発明の一構成に係る防犯用センサ装置の照準器は、防犯用センサ装置を構成する投光器または受光器に設けられて両者間の光軸を調整するための照準器であって、接眼窓と、対物窓と、前記接眼窓と対物窓との間で照準軸上に配置された照準ミラーとを備え、前記照準ミラーは、前記接眼窓に目を近づけて覗いたときに、前記対物窓における照準軸が通る中心部のみを通して見える中心領域を映す中心鏡面と、この中心鏡面の外周に位置し前記対物窓における中心部の外側の周縁部を通して見える周縁領域を映す周縁鏡面とを有し、前記周縁鏡面に表面荒し加工、つや消しコーティング、または前記中心鏡面と色相の異なる被覆が施されて、前記周縁鏡面の視認性が前記中心鏡面よりも低く設定されている。ここで、照準軸とは、接眼窓、照準ミラーおよび対物窓の各中心部を通る光軸をいう。
【０００８】
この防犯用センサ装置の照準器では、目を接眼窓に対しこれの外形を確認できる位置まで近づけて覗いて、比較的広い視野で照準ミラーの全体を見ながら調整ねじなどを操作し、先ず、照準ミラーの中心鏡面と周縁鏡面の両方を見て、相手方の投光器または受光器が映った広い視野の像が鏡面全体に入るように調整する。このとき、周縁鏡面は中心鏡面よりも視認性が低いが、その周縁鏡面に所要の像が映ったと思われたときには、目をその位置に保ったまま中心鏡面を注視して、周縁鏡面の前記像が中心鏡面にくるように光軸調整操作を行い、視認性の高い中心鏡面に映った像が所要のものであるか否かを確認する。中心鏡面に映った像が所要の像である場合には、投光器と受光器との間で光軸がほぼ一致したことになる。このように、この照準器では、目を接眼窓に対し適度に近づけた一定の位置に保ちながら光軸調整操作を行って、光軸合わせを容易、かつ迅速に行うことができる。しかも、前記周縁鏡面に表面荒し加工、つや消しコーティング、または前記中心鏡面と色相の異なる被覆が施されているので、一枚物のミラー体に、視認性の低い周縁鏡面と視認性の高い中央鏡面とを容易に形成することができる。
【００１０】
本発明の好ましい実施形態では、前記中心鏡面と周縁鏡面との境界を示す境界線を有している。これにより、中心鏡面と周縁鏡面とを共に同一の比較的高い視認性を有する鏡面とすることができ、先ず、所要の像が中心鏡面と周縁鏡面を含む鏡面全体に映ったのを確認してから、目をその位置に保ったまま所要の像が中央鏡面にくるように光軸調整操作を行うことができるので、光軸合わせを容易、かつ迅速に行うことができる。
【００１６】
【発明の実施の形態】
以下、本発明の好ましい実施形態について図面を参照しながら説明する。
図１は本発明の照準器が適用される防犯用センサ装置を示すブロック構成図である。この防犯用センサ装置は、直線的な警戒区域の両端部の壁面またはポールに光軸を一致させて相対向する配置で設置される投光部１と受光部８とからなり、投光部１および受光部８は共にユニット化された構成になっている。
【００１７】
投光部１は投光器２および投光器駆動回路３を有しており、この投光器２および投光器駆動回路３は、後述するように、一対設けられているが、図１では１つのみを示している。投光器２は、赤外線発光ダイオードなどの投光素子と、この投光素子から発生した赤外線を反射して一定方向に向かう近赤外線のような赤外線ビームＩＲとして出射する出射ミラーとを備えている。投光器駆動回路３は投光器２の投光素子を所定の周波数で発光駆動してパルス変調波からなる赤外線ビームＩＲを出射させる。
【００１８】
一方、受光部８では、集光レンズとフォトトランジスタなどの受光素子とを備えた受光器９が、投光部１からの赤外線ビームＩＲを受光して、その赤外線受光量に応じた信号レベルの電気信号を出力し、この電気信号が増幅回路１０で増幅されたのちに、検波回路１１で外乱光を除去されてパルス変調波のみによる受光信号のレベルに応じた信号に変換され、この信号レベルが予め設定された侵入検知レベル以下であるか否かを信号判別回路１２で判別される。信号判別回路１２は、投光部１からの赤外線ビームＩＲが不法浸入者により遮られて受光信号レベルが予め設定された侵入検知レベル以下であると判別したときに、検知信号を出力する。警報回路１３は、信号判別回路１２から検知信号が入力することによって駆動され、不法浸入者が存在することを報知するための警報信号を、例えば図示しない警備センターへ出力するようになっている。
【００１９】
受光部８の検波回路１１には電圧計などのレベルメータ１４が接続されており、このレベルメータ１４には、受光器９の赤外線受光量に比例した信号レベルが表示される。検波回路１１には、レベルメータ１４とは別に、受光信号のレベルが所定レベルを越えたときに点灯するレベル表示器が接続されることもある。前記受光器９、増幅回路１０、検波回路１１、信号判別回路１２およびレベルメータ１４も、後述するように、一対設けられているが、図１では１つのみを示している。
【００２０】
図２は前記防犯用センサ装置に具備されている本発明の一実施形態に係る照準器４を示す概略横断面図、図３（ａ）はその照準器４を示す斜視図、図３（ｂ）は照準器４の照準ミラー２７の正面図である。図示の照準器４は受光部８に設けられたものであるが、図１の投光部１も同様の構成を有する照準器４を備えている。
【００２１】
図３（ａ）に示すように、前記照準器４の本体ケース７は、第１ケース１７と第２ケース１８とを合体して構成されている。第１ケース１７は、前側面に左右一対の接眼窓（のぞき窓）２０と左右一対の対物窓（照準孔）２１とを有している。これら窓２０，２１は、単なる開口でもよいし、開口に透明なガラスや樹脂からなる窓材を嵌め込んだものでよい。第２ケース１８は、第１ケース１７の後部に例えばねじ止め手段で連結されており、両側面から突設された一対の軸受筒部２８を有している。図２に示すように、本体ケース７内には、照準ミラー２７が対物窓２１との間で照準軸３２上に配置され、これにより、照準器４が構成されている。
【００２２】
照準ミラー２７は、帯板状の部材の下部に鏡面を有しており、図３（ｂ）に示すように、接眼窓２０に目を近づけて覗いたときに、対物窓２１における照準軸３２が通る中心部のみを通して見える中心領域を映す中心鏡面２２と、この中心鏡面２２の外周に位置して対物窓２１における中心部の外側の周縁部を通して見える周縁領域を映す周縁鏡面２３とを有している。周縁鏡面２３は中心鏡面２２よりも低い視認性に設定されている。例えば、周縁鏡面２３は、シボ・エッチング処理したのちに金属のめっきまたは蒸着処理する表面荒し加工を行って梨地としたり、つや消しコーティングを行って視認性を低下させることにより形成されている。また、周縁鏡面２３は、中心鏡面２２とは色相の異なる金属のめっきまたは蒸着処理を作ったり、中心鏡面２２とは異なる色相のカラーコーティングやカラーフィルムの貼着による表面着色処理を行ってもよく、要するに中心鏡面２２とは視覚により識別できるように表面が処理されていればよい。これにより、前記照準ミラー２７は、一枚物のミラー体に視認性の低い周縁鏡面２３と視認性の高い中央鏡面２２とを容易に形成することができる。
【００２３】
図４は、前記照準器４が組み込まれた受光部８を示す斜視図であり、投光部１も同様の構成になっているので、同図には投光部１における相当部品に対応する符号をも併せて付してある。受光部８は、壁などの取付面に取り付けられる取付用ベース３３と、この取付用ベース３３にこれの複数の取付孔３４を介して着脱自在に取り付けられてセンサ回路全体を覆うカバー３５とにより、外体ケースが構成されている。受光器９は、集光ミラー２４の焦点位置に受光素子３１が配置され、その集光ミラー２４の開口部がミラーカバー３６で覆われている。
【００２４】
取付用ベース３３の中央部に設けられた端子台ケース３９の上下部には、回転板３７が図示しない鉛直軸回り（図のｈ方向回り）に回転自在に設けられており、この回転板３７には、図２でも示した一対の支持板２９が、図４の回転板３７に対し直交する配置で固定されている。この両支持板２９の外側面には、滑り止め付きの操作板（右方側のみ図示）３８が固定されており、操作板３８を手で持って回転操作することにより、受光器９の水平角（図４のｈ方向の角度）が粗調整される。さらに、調整ねじ４０の正逆方向への回転操作によって微調整が行われる。
【００２５】
受光器９に一体化された照準器４は、図２に示したように、左右一体の軸受筒部２８が支持板２９の支軸３０に回転自在に外嵌されて、支軸３０回り（図４のｖ方向回り）に回転自在に支持されており、この照準器４の支軸３０回りの回動は、図４の調整ねじ４１の正逆方向への回転操作によって行われる。こうして、受光器９の上下角（図４のｖ方向の角度）が可変調節される。受光器９の投光器２に対する光軸合わせは、水平角と上下角とを可変調整することによって行われる。なお、図１の投光部１は、受光素子３１の配設位置に受光素子に代えて投光素子を配置するだけであり、その他の構成は上述した受光部８と同様である。また、このセンサ装置では、図１の２つの受光器９から共に検知信号が出力されたときに警報回路１３から警報信号を出力するようになっている。
【００２６】
この防犯用センサ装置では、設置時やメンテナンス時に光軸調整を行う場合、先ず、図４の投光部１におけるベース３３に着脱自在となったカバー３５を開放して、照準器４の接眼窓２０を覗きながら操作板３８を回転操作して、投光器２の水平角または上下角を調整し、図３（ａ）に示すように、照準ミラー２７に映る受光器９の像が対物窓２１の中心に位置するように操作することにより、光軸の粗調整を行う。
【００２７】
前記光軸調整に際しては、目を接眼窓２０に対しこれの外形を確認できる位置に近づけた状態で接眼窓２２を覗いて、図３（ａ）に示すように、比較的広い視野で照準ミラー２７の全体を見ながら前記の操作板３８を回転操作し、先ず、照準ミラー２７の中心鏡面２２と周縁鏡面２３を含む鏡面全体を見て、その鏡面全体に相手方の受光器９の像が入るように調整する。周縁鏡面２３は中心鏡面２２よりも視認性が低いが、その周縁鏡面２３に所要の像が映ったと思われたときには、目をその位置に保ったまま中心鏡面２２を注視して、周縁鏡面２３の前記像が中心鏡面２２にくるように光軸調整操作を行い、視認性の高い中心鏡面２２に映った像が所要のものであるか否かを確認する。
【００２８】
中心鏡面２２に映った像が所要の像である場合には、図３（ａ）に示すように、その像が中心鏡面２２の中央にくるように微調整すれば、投光器２の光軸が受光器９にほぼ一致したことになる。このように、この照準器４では、目を接眼窓２０に対し適度に近づけた一定の位置に保ちながら光軸調整操作を行って、光軸合わせを容易、かつ迅速に行うことができる。
【００２９】
つぎに、図４の受光部８におけるベース３３に着脱自在となったカバー３６を開放して、同様に照準器４を見ながら操作板３８を回転操作して受光器２の水平角または上下角を調整し、照準ミラー２７に映る投光器２の像と対物窓２１とが重なるように操作することにより、光軸の粗調整を行う。この場合の光軸調整は、上述した投光器２の照準器４と同様の操作により行う。
【００３０】
つづいて、図１のレベルメータ１４の表示を見ながら表示レベルが最大値になるように操作板３８（図４）を回転操作して光軸の微調整を行い、レベルメータ１４の表示が所定レベル以上になるまで、つまり受光器９の光軸が投光器２に正確に一致するまで、このような投光部１および受光部８の光軸調整を必要に応じて複数回繰り返す。
【００３１】
図５（ａ）〜（ｃ）は何れも他の照準ミラー４１〜４３を示す正面図である。図５（ａ）の照準ミラー４１は、全体が比較的高い視認性を有する鏡面に、照準軸３２の反射点を中心に含む中心指示マーク４４が表記されている。この照準ミラー４１の場合には、これに映る像を注視して、比較的高い視認性を有する鏡面の何れかの箇所に所要の像が映ったのを確実に確認してから、目を接眼窓２０に対しその位置に保ったまま、所要の像が中心指示マーク４４に合致するように光軸調整操作を行うことができるので、光軸合わせを容易、かつ迅速に行うことができる。
【００３２】
図５（ｂ）の照準ミラー４２は、全体が比較的高い視認性を有する鏡面に円からなる境界線４７を表記して、その境界線４７の内側を中心鏡面４５に、外側を周縁鏡面４６に設定したものである。境界線４７の形状は、接眼窓２０から見て円形となっており、したがって、鏡面の法線方向から見た正面図では、図５（ｂ）に示すとおり、横長の楕円形ないし長円形となる。この照準ミラー４２の場合には、中心鏡面４５と周縁鏡面４６の両方を含む鏡面全体に映る像を注視して、鏡面全体の何れかの箇所に所要の像が映ったのを確認してから、目を接眼窓２０に対しその位置に保ったまま、所要の像が中心鏡面４５内に入るように光軸調整操作を行うので、光軸合わせを容易、かつ迅速に行うことができる。
【００３３】
図５（ｃ）の照準ミラー４３は、全体が比較的高い視認性を有する鏡面に、照準軸３２の反射点で交差する十字線４８を表記したものである。この照準ミラー４３の場合には、これに映る像を注視して、比較的高い視認性を有する鏡面の何れかの箇所に所要の像が映ったのを確実に確認してから、目を接眼窓２０に対しその位置に保ったまま、所要の像が十字線示マーク４８の交差点に合致するように光軸調整操作を行うことにより、光軸合わせを一層容易、かつ迅速に行うことができる。
【００３４】
【発明の効果】
以上のように本発明の一構成に係る防犯用センサ装置によれば、照準ミラーに、接眼窓に目を近づけて覗いたときに、対物窓における照準軸が通る中心部のみを通して見える中心領域を映す中心鏡面と、この中心鏡面の外周に位置し前記対物窓における中心部の外側の周縁部を通して見える周縁領域を映す周縁鏡面とを有し、周縁鏡面の視認性を中心鏡面よりも低く設定したので、目を接眼窓に対し適度に近づけた一定の位置に保ちながら、周縁鏡面に映った所要の像を中心鏡面に入るように光軸調整操作を行って、光軸合わせを容易、かつ迅速に行うことができる。
【００３５】
また、本発明の他の構成に係る防犯用センサ装置によれば、全体が同一の視認性となった鏡面に、中心鏡面と周縁鏡面との境界を示す境界線、照準軸の反射点を中心に含む中心指示マークまたは照準軸の反射点で交差する十字線を表示することにより、目を接眼窓に対しその位置に保ったまま所要の像が境界線の内部に入るように、或いは所要の像が中心指示マークまたは十字線の交差点に合致するように光軸調整操作を行うことにより、光軸合わせを容易、かつ迅速に行うことができる。
【図面の簡単な説明】
【図１】本発明の照準器が適用される防犯用センサ装置を示すブロック図である。
【図２】本発明の一実施形態に係る照準器を示す概略横断面図である。
【図３】（ａ）は同上の照準器を示す斜視図、（ｂ）は照準器の照準ミラーの正面図である。
【図４】同上の照準器が組み込まれてなる受光部を示す斜視図である。
【図５】（ａ）〜（ｃ）は何れも本発明の他の実施形態に係る照準ミラーを示す正面図である。
【図６】（ａ），（ｂ）は従来の照準器を用いた光軸調整時の動作を示す照準器の概略横断面図である。
【符号の説明】
２…投光器、４…照準器、９…受光器、２０…接眼窓、２１…対物窓、２２，４５…中心鏡面、２３，４６…周縁鏡面、３２…照準軸、４４…中心指示マーク、４７…境界線、４８…十字線[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a security sensor device that receives an infrared beam emitted from a light projecting element of a light projecting unit with a light receiving element of a light receiving unit and issues an alarm signal when a human body or the like interrupts the infrared beam.
[0002]
[Prior art]
This type of security sensor device is installed at both ends of the linear security area, with the projectors of the infrared light projecting unit and the light receivers of the infrared light receiving unit arranged so that their optical axes coincide with each other. Since it is possible to set a warning area from a straight short distance to a long distance of several hundreds of meters, it becomes more difficult to accurately match the optical axes between the projector and the light receiver as the distance increases. Therefore, in the conventional security sensor device, an sighting device as shown in FIG. 6 is provided in each of the projector and the light receiver, and the optical axis is adjusted by the sighting device when the sensor device is installed or maintained. ing.
[0003]
The sighting device 50 includes a pair of eyepiece windows 51, a pair of objective windows 52, and a pair of aiming mirrors 53 disposed on the aiming shaft 54 between the both 51 and 52. In the optical axis adjustment using the sighting device 50, while looking through either the left or right eyepiece window 51, the dial or adjustment screw is operated to move the direction of the projector or light receiver up, down, left, or right, and to the aiming mirror 53. Adjustment is made so that the image of the received light receiver or projector is in the center of the objective window 52. Since the optical axis alignment by the sighting device 59 is a rough adjustment, after performing this rough adjustment, the dial and the adjusting screw are operated so that the display level becomes the maximum value while viewing the display of the level meter of the light receiving unit. The optical axis is coarsely adjusted, and fine adjustment of the optical axis is repeated until the display on the level meter reaches a predetermined level or higher, that is, until the optical axis accurately matches between the projector and the light receiver.
[0004]
[Problems to be solved by the invention]
By the way, in the sighting device 50, as shown in FIG. 6A, when the position of the eye is brought close to the eyepiece window 51, the entire field of view can be seen and the whole image reflected on the sighting mirror 53 can be seen. Although it is convenient to adjust the aim roughly, it is difficult to specify an image located at the center of the eyepiece window 51. On the other hand, as shown in FIG. 6B, when the position of the eye is moved away from the eyepiece window 51, it is easy to specify an image located at the center of the eyepiece window 51, but the field of view is narrowed. If the position of the device is greatly deviated from the aiming axis, the image will not be captured, making it difficult to align the optical axes.
[0005]
Therefore, in the prior art, first, as shown in (a), while looking into the eyepiece window 51, the dial or the adjusting screw is operated so that the image of the light projecting part or the light receiving part is reflected on the aiming mirror 53. Adjust to. After that, as shown in (b), the eye is moved away and adjusted so that the required image comes to the center of the aiming mirror 53, and then the eye is brought closer to the eyepiece window 51 and reflected on the aiming mirror 53. Confirm that it is the required image. As described above, in the optical axis alignment by the conventional sighting device 50, the eye position is reciprocated several times in the direction in which the eye is in contact with and away from the eyepiece window 51 while keeping the eye position in a certain relative direction with respect to the eyepiece window 51. It is necessary to adjust the optical axis so that the required image comes to the center of the aiming mirror 53 by operating the dial and the adjusting screw each time.
[0006]
The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a sighting device for a security sensor device capable of adjusting an optical axis while fixing an eye at a fixed position and looking through an eyepiece window. It is what.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a sighting device for a security sensor device according to one configuration of the present invention is provided in a projector or a light receiver constituting the security sensor device and is used for adjusting an optical axis between them. An eyepiece window, an objective window, and an aiming mirror disposed on an aiming axis between the eyepiece window and the objective window, wherein the aiming mirror is close to the eyepiece window. A central mirror surface that reflects a central region that is visible only through the central portion of the objective window through which the sighting axis passes, and a peripheral region that is located on the outer periphery of the central mirror surface and is visible through the peripheral portion outside the central portion of the objective window. The peripheral mirror surface is subjected to surface roughening, matte coating, or coating having a hue different from that of the central mirror surface, and the visibility of the peripheral mirror surface is set lower than that of the central mirror surface. Here, the aiming axis refers to an optical axis that passes through each central portion of the eyepiece window, the aiming mirror, and the objective window.
[0008]
In the sighting device of this security sensor device, look into the eyepiece window close to the position where the outer shape of the eyepiece can be confirmed, and operate the adjustment screw etc. while looking at the whole aiming mirror with a relatively wide field of view, Look at both the central mirror and the peripheral mirror of the aiming mirror, and adjust so that the image of the wide field of view reflected by the other projector or receiver enters the entire mirror. At this time, the peripheral mirror surface is less visible than the central mirror surface, but when it is thought that the required image is reflected on the peripheral mirror surface, keep an eye on the center mirror surface, The optical axis adjustment operation is performed so that the image comes to the central mirror surface, and it is confirmed whether or not the image reflected on the central mirror surface with high visibility is the required one. When the image reflected on the central mirror surface is a required image, the optical axes are almost coincident between the projector and the light receiver. As described above, in this sighting device, the optical axis can be adjusted easily and quickly by performing the optical axis adjustment operation while keeping the eye at a certain position appropriately close to the eyepiece window. In addition, since the peripheral mirror surface is subjected to surface roughening, matte coating, or coating having a hue different from that of the central mirror surface, a single mirror body has a peripheral mirror surface with low visibility and a central mirror surface with high visibility. Can be easily formed.
[0010]
In preferable embodiment of this invention, it has the boundary line which shows the boundary of the said center mirror surface and a peripheral mirror surface. As a result, both the central mirror surface and the peripheral mirror surface can be made into the same mirror surface having relatively high visibility. First, confirm that the required image is reflected on the entire mirror surface including the central mirror surface and the peripheral mirror surface. Therefore, the optical axis adjustment operation can be performed so that a required image is placed on the central mirror surface while keeping the eye in that position, so that the optical axis can be easily and quickly aligned.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a security sensor device to which the sighting device of the present invention is applied. This security sensor device is composed of a light projecting unit 1 and a light receiving unit 8 which are installed in such a manner that their optical axes coincide with each other or wall surfaces or poles at both ends of a linear security area. The light receiving unit 8 is unitized.
[0017]
The light projecting unit 1 has a light projector 2 and a light projector drive circuit 3, and a pair of the light projector 2 and the light projector drive circuit 3 are provided as will be described later, but only one is shown in FIG. . The light projector 2 includes a light projecting element such as an infrared light emitting diode, and an output mirror that reflects the infrared light generated from the light projecting element and emits it as an infrared beam IR such as a near infrared light traveling in a certain direction. The projector drive circuit 3 emits an infrared beam IR composed of a pulse-modulated wave by driving the projector element of the projector 2 to emit light at a predetermined frequency.
[0018]
On the other hand, in the light receiving unit 8, a light receiver 9 including a condenser lens and a light receiving element such as a phototransistor receives the infrared beam IR from the light projecting unit 1 and has a signal level corresponding to the amount of received infrared light. After the electrical signal is output and amplified by the amplifier circuit 10, disturbance light is removed by the detection circuit 11 and converted into a signal corresponding to the level of the received light signal using only the pulse modulated wave. Is determined by the signal determination circuit 12 whether or not is equal to or lower than a preset intrusion detection level. The signal determination circuit 12 outputs a detection signal when the infrared beam IR from the light projecting unit 1 is blocked by an illegal intruder and it is determined that the light reception signal level is equal to or lower than a preset intrusion detection level. The alarm circuit 13 is driven when a detection signal is input from the signal discrimination circuit 12, and outputs an alarm signal for notifying that an illegal intruder exists, for example, to a security center (not shown).
[0019]
A level meter 14 such as a voltmeter is connected to the detection circuit 11 of the light receiving unit 8, and a signal level proportional to the amount of infrared light received by the light receiver 9 is displayed on the level meter 14. In addition to the level meter 14, the detection circuit 11 may be connected to a level indicator that is lit when the level of the received light signal exceeds a predetermined level. The light receiver 9, the amplifier circuit 10, the detector circuit 11, the signal discriminating circuit 12, and the level meter 14 are also provided as a pair as will be described later, but only one is shown in FIG.
[0020]
2 is a schematic cross-sectional view showing an aiming device 4 according to an embodiment of the present invention provided in the security sensor device, FIG. 3A is a perspective view showing the aiming device 4, and FIG. ) Is a front view of the aiming mirror 27 of the aiming device 4. The illustrated sighting device 4 is provided in the light receiving unit 8, but the light projecting unit 1 in FIG. 1 also includes the sighting device 4 having the same configuration.
[0021]
As shown in FIG. 3A, the main body case 7 of the sighting device 4 is configured by combining a first case 17 and a second case 18. The first case 17 has a pair of left and right eyepiece windows (observation windows) 20 and a pair of left and right objective windows (sighting holes) 21 on the front side surface. These windows 20 and 21 may be simple openings or may be made by fitting window materials made of transparent glass or resin into the openings. The second case 18 is connected to the rear portion of the first case 17 by, for example, screwing means, and has a pair of bearing tube portions 28 protruding from both side surfaces. As shown in FIG. 2, the aiming mirror 27 is disposed on the aiming shaft 32 between the main body case 7 and the objective window 21, thereby configuring the aiming device 4.
[0022]
The aiming mirror 27 has a mirror surface at the lower part of the strip-shaped member, and as shown in FIG. 3B, when aiming closely at the eyepiece window 20, the aiming axis 32 in the objective window 21 is seen. A central mirror surface 22 that reflects a central region that can be seen only through the central portion that passes through, and a peripheral mirror surface 23 that is located on the outer periphery of the central mirror surface 22 and reflects a peripheral region that is visible through the peripheral edge outside the central portion of the objective window 21. ing. The peripheral mirror surface 23 is set to be less visible than the central mirror surface 22. For example, the peripheral mirror surface 23 is formed by performing a roughening process such as a metal plating or a vapor deposition process after a grain etching process, or a matte coating or reducing the visibility by performing a matte coating. Further, the peripheral mirror surface 23 may be subjected to a metal plating or vapor deposition process having a hue different from that of the central mirror surface 22, or may be subjected to a surface coloring process by attaching a color coating or a color film having a hue different from that of the central mirror surface 22. In short, it is only necessary that the surface is treated so as to be visually distinguishable from the central mirror surface 22. Thereby, the aiming mirror 27 can easily form the peripheral mirror surface 23 with low visibility and the central mirror surface 22 with high visibility on a single mirror body.
[0023]
FIG. 4 is a perspective view showing the light receiving unit 8 in which the sighting device 4 is incorporated. Since the light projecting unit 1 has the same configuration, FIG. 4 corresponds to the corresponding parts in the light projecting unit 1. Reference numerals are also given. The light receiving unit 8 includes an attachment base 33 that is attached to an attachment surface such as a wall, and a cover 35 that is detachably attached to the attachment base 33 through a plurality of attachment holes 34 and covers the entire sensor circuit. The outer case is configured. In the light receiver 9, the light receiving element 31 is disposed at the focal position of the collector mirror 24, and the opening of the collector mirror 24 is covered with a mirror cover 36.
[0024]
A rotating plate 37 is provided on the upper and lower portions of the terminal block case 39 provided at the center of the mounting base 33 so as to be rotatable around a vertical axis (not shown) (in the h direction in the figure). In FIG. 2, a pair of support plates 29 shown in FIG. 2 are fixed in an arrangement orthogonal to the rotating plate 37 of FIG. An operation plate 38 with a non-slip (shown only on the right side) 38 is fixed to the outer side surfaces of both support plates 29. By rotating the operation plate 38 by hand, the horizontal direction of the light receiver 9 can be obtained. The angle (angle in the h direction in FIG. 4) is roughly adjusted. Further, fine adjustment is performed by rotating the adjustment screw 40 in the forward / reverse direction.
[0025]
Sight 4, which is integrated into the light receiver 9, as shown in FIG. 2, the bushing portion 28 of the left and right integrated is rotatably fitted on a support shaft 30 of the support plate 29, the support shaft 30 around The sighting device 4 is supported so as to be rotatable about the support shaft 30 (rotation around the v direction in FIG. 4), and is performed by rotating the adjusting screw 41 in FIG. Thus, the vertical angle (angle in the v direction in FIG. 4) of the light receiver 9 is variably adjusted. The optical axis alignment of the light receiver 9 with respect to the projector 2 is performed by variably adjusting the horizontal angle and the vertical angle. Note that the light projecting unit 1 in FIG. 1 only includes a light projecting element instead of the light receiving element at the position where the light receiving element 31 is disposed, and the other configuration is the same as that of the light receiving unit 8 described above. Further, in this sensor device, an alarm signal is output from the alarm circuit 13 when both detection signals are output from the two light receivers 9 in FIG.
[0026]
In this security sensor device, when the optical axis is adjusted during installation or maintenance, first, the cover 35 that is detachable from the base 33 in the light projecting unit 1 of FIG. The horizontal or vertical angle of the projector 2 is adjusted by rotating the operation plate 38 while looking into the image 20, and the image of the light receiver 9 reflected on the aiming mirror 27 is displayed on the objective window 21 as shown in FIG. By performing an operation so as to be positioned at the center, coarse adjustment of the optical axis is performed.
[0027]
When the optical axis is adjusted, the eye mirror 22 is looked into the eyepiece window 20 in a state where the outer shape of the eyepiece window 20 can be confirmed, and the aiming mirror is viewed with a relatively wide field of view as shown in FIG. The operation plate 38 is rotated while viewing the entire screen 27. First, the entire mirror surface including the central mirror surface 22 and the peripheral mirror surface 23 of the aiming mirror 27 is viewed, and the image of the counterpart light receiver 9 enters the entire mirror surface. Adjust as follows. The peripheral mirror surface 23 is less visible than the central mirror surface 22, but when it is considered that a required image is reflected on the peripheral mirror surface 23, the peripheral mirror surface 23 is watched while keeping the eye in that position. The optical axis adjustment operation is performed so that the image is on the central mirror surface 22, and it is confirmed whether or not the image reflected on the central mirror surface 22 with high visibility is required.
[0028]
When the image reflected on the central mirror surface 22 is a required image, as shown in FIG. 3A, if the image is finely adjusted so as to be in the center of the central mirror surface 22, the optical axis of the projector 2 is adjusted. This almost coincides with the light receiver 9. As described above, the sighting device 4 can perform the optical axis adjustment easily and quickly by performing the optical axis adjustment operation while keeping the eye at a certain position appropriately close to the eyepiece window 20.
[0029]
Next, the cover 36 that can be attached to and detached from the base 33 in the light receiving unit 8 in FIG. 4 is opened, and the operation plate 38 is rotated while viewing the sighting device 4 in the same manner, so that the horizontal angle or vertical angle of the light receiving device 2 is obtained. Is adjusted so that the image of the projector 2 reflected on the aiming mirror 27 and the objective window 21 overlap each other, thereby roughly adjusting the optical axis. The optical axis adjustment in this case is performed by the same operation as the sighting device 4 of the projector 2 described above.
[0030]
Subsequently, while observing the display of the level meter 14 in FIG. 1, the operation plate 38 (FIG. 4) is rotated so that the display level becomes the maximum value, and the optical axis is finely adjusted. Such adjustment of the optical axes of the light projecting unit 1 and the light receiving unit 8 is repeated a plurality of times as necessary until the level exceeds the level, that is, until the optical axis of the light receiving unit 9 accurately matches the projector 2.
[0031]
FIGS. 5A to 5C are front views showing other aiming mirrors 41 to 43. The aiming mirror 41 in FIG. 5A has a center indication mark 44 including the reflection point of the aiming axis 32 as a center on a mirror surface having a relatively high visibility as a whole. In the case of the aiming mirror 41, the image reflected on the aiming mirror 41 is watched, and after confirming that the required image is reflected in any part of the mirror surface having relatively high visibility, the eyepiece is inspected. Since the optical axis adjustment operation can be performed so that a required image coincides with the center indicating mark 44 while keeping the position with respect to the window 20, the optical axis can be easily and quickly aligned.
[0032]
In the aiming mirror 42 of FIG. 5B, a boundary line 47 made of a circle is written on a mirror surface having a relatively high visibility as a whole, and the inner side of the boundary line 47 is a central mirror surface 45 and the outer side is a peripheral mirror surface 46. Is set. The shape of the boundary line 47 is circular when viewed from the eyepiece window 20. Therefore, in the front view viewed from the normal direction of the mirror surface, as shown in FIG. Become. In the case of this aiming mirror 42, after paying attention to the image reflected on the entire mirror surface including both the central mirror surface 45 and the peripheral mirror surface 46, it is confirmed that the required image is reflected in any part of the entire mirror surface. Since the optical axis adjustment operation is performed so that a required image enters the central mirror surface 45 while keeping the eye in the position with respect to the eyepiece window 20, the optical axis can be adjusted easily and quickly.
[0033]
The aiming mirror 43 in FIG. 5C is a mirror surface having a relatively high visibility as a whole, and a cross line 48 intersecting at the reflection point of the aiming axis 32 is described. In the case of the aiming mirror 43, the image reflected on the aiming mirror 43 is watched, and after confirming that the required image is reflected in any part of the mirror surface having relatively high visibility, the eyepiece is inspected. Optical axis alignment can be performed more easily and quickly by performing the optical axis adjustment operation so that a required image matches the intersection of the cross-shaped mark 48 while maintaining the position with respect to the window 20. .
[0034]
【The invention's effect】
As described above, according to the security sensor device according to one configuration of the present invention, the central region that can be seen only through the central portion of the objective window through which the sighting axis passes when the eye mirror is viewed close to the eyepiece window. A central mirror surface to be projected, and a peripheral mirror surface that is located on the outer periphery of the central mirror surface and reflects a peripheral region that is visible through the peripheral edge outside the central portion of the objective window, and the visibility of the peripheral mirror surface is set lower than that of the central mirror surface Therefore, while maintaining the eye in a certain position that is reasonably close to the eyepiece window, the optical axis adjustment operation is performed so that the required image reflected on the peripheral mirror surface enters the central mirror surface, making it easy and quick to align the optical axis. Can be done.
[0035]
In addition, according to the security sensor device according to another configuration of the present invention, the entire mirror surface having the same visibility has a boundary line indicating a boundary between the central mirror surface and the peripheral mirror surface, and a reflection point of the aiming axis. By displaying the center indicator mark or the crosshairs that intersect at the reflection point of the aiming axis, the required image can be placed inside the boundary line while keeping the eye in its position with respect to the eyepiece window. By performing the optical axis adjustment operation so that the image matches the center indication mark or the intersection of the cross lines, the optical axis can be adjusted easily and quickly.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a security sensor device to which a sighting device of the present invention is applied.
FIG. 2 is a schematic cross-sectional view showing a sighting device according to an embodiment of the present invention.
FIG. 3A is a perspective view showing the sighting device, and FIG. 3B is a front view of an aiming mirror of the sighting device.
FIG. 4 is a perspective view showing a light receiving unit into which the sighting device is incorporated.
FIGS. 5A to 5C are front views showing an aiming mirror according to another embodiment of the present invention.
FIGS. 6A and 6B are schematic cross-sectional views of the sighting device showing the operation during optical axis adjustment using a conventional sighting device. FIGS.
[Explanation of symbols]
2 ... projector, 4 ... sighting device, 9 ... light receiver, 20 ... eyepiece window, 21 ... objective window, 22, 45 ... central mirror surface, 23, 46 ... peripheral mirror surface, 32 ... aiming axis, 44 ... center indication mark, 47 ... Border line, 48 ... Crosshair

Claims

A sighting device for adjusting a light axis provided between a light projector or a light receiver constituting a security sensor device,
An eyepiece window, an objective window, and an aiming mirror disposed on the aiming axis between the eyepiece window and the objective window,
The aiming mirror is located at an outer periphery of the central mirror surface and a central mirror surface that reflects a central region that is visible only through a central portion through which the aiming axis passes through the objective window when the eyepiece window is viewed closely. A peripheral mirror surface that reflects a peripheral region that can be seen through the peripheral portion outside the center of
A sighting device for a security sensor device, wherein the peripheral mirror surface is subjected to surface roughening, matte coating, or a coating having a hue different from that of the central mirror surface, and the peripheral mirror surface has a lower visibility than the central mirror surface.

The sighting device of the security sensor device according to claim 1, wherein the sighting device has a boundary line indicating a boundary between the central mirror surface and the peripheral mirror surface.