JP3741766B2

JP3741766B2 - Lamp disconnection detector

Info

Publication number: JP3741766B2
Application number: JP03587496A
Authority: JP
Inventors: 浩一宮浦; 年男田中
Original assignee: Toshiba Corp
Current assignee: Toshiba Corp
Priority date: 1996-02-23
Filing date: 1996-02-23
Publication date: 2006-02-01
Anticipated expiration: 2016-02-23
Also published as: JPH09232085A

Description

【０００１】
【発明の属する技術分野】
本発明は、空港の滑走路・誘導路等に設置される誘導灯・制御灯等の灯器を制御する、航空機誘導灯監視システム等に於ける灯器断芯検出装置に係わり、特に灯器の発光部が断芯したことを検出し、伝送路で接続された外部装置に灯器が断芯したことを伝える灯器断芯検出装置に関する。
【０００２】
【従来の技術】
図８に従来の技術の構成図を記す。従来の航空機誘導監視システムは、定電流電源装置に複数の変流器を直列に接続し、この変流器の二次側に灯器１個のみを接続する場合と、この変流器の二次側に灯器を直列に複数個接続する場合があり、灯器を直列に接続する場合には個々の灯器と並列に高電圧を印加すると短絡動作するフィルムカットアウトを接続する構成としており、変流器の二次側に１個だけ灯器が接続されている場合にこの灯器が断芯すると、断芯した灯器が消灯状態になると共に、接続された変流器の二次側が開放することにより高電圧が発生したままの状態になり、変流器の二次側に複数の灯器が直列に接続されている場合に灯器が断芯すると、変流器の二次側が開放することにより高電圧が発生し、この高電圧が断芯した灯器と並列に接続されたフィルムカットアウトに印加されて短絡動作し、変流器の二次側から供給される電流をバイパスして、断芯していない他の灯器に変流器の二次側からの電流を供給し、点灯状態を保持させていた。
【０００３】
【発明が解決しようとする課題】
上記した従来技術によれば、灯器の断芯は灯器が点灯しないことを目視で発見するしか手段がなく、空港に設置されている膨大な数の灯器の中で断芯した灯器を発見するためには、人為的に全ての灯器の場所に行き灯器を一つずつ確認しなければならないため、断芯した灯器を発見するまでに時間と労力が掛かっていた。
【０００４】
また、灯器はいつ断芯するかは分からないため、断芯した灯器を発見する行為を所定の間隔で行わなければならなかった。
本発明は、上記の課題を解決すべく成されたものであり、システムの経済性と信頼性を低下させることなく灯器の断芯を検出して伝送路を介して外部装置に伝え、灯器が断芯したことを即時に発見できることを可能とさせる、灯器断芯検出装置を提供することを目的とする。
【０００５】
【課題を解決するための手段】
本発明を、図１に示す構成図を用いて説明する。変流器１の二次側から供給される電流を入力とし、この電流を装置内部の電源電流とすると共に灯器２に出力する灯器断芯検出装置であり、灯器２が断芯したことにより変流器１の二次側が開放して発生する高電圧から灯器断芯検出装置を保護する過電圧保護回路３と、この過電圧保護回路３が動作したか否かにより所定レベルの過電圧が発生したか否かを検出する過電圧検出回路４と、灯器２の前段にて電流をバイパスさせるためのリレー５と、システム的に伝送路６で接続された外部装置７に情報を伝えるための伝送制御回路８と、リレーと各回路を制御するための演算処理回路９と、入力された電流より内部電源電圧を確保する電源回路10より構成され灯器断芯検出装置である。
【０００６】
変流器１の二次側から供給される電流を入力して灯器２にこの電流を出力している時に灯器２が断芯すると、変流器１の二次側が開放状態となり高電圧が発生する。灯器２が断芯していない状態では開放状態を保持している過電圧保護回路３は灯器２が断芯した時に印加される高電圧を所定の電圧レベルで放電させて高電圧を所定の電圧レベルに抑制させる。過電圧検出回路４は過電圧保護回路３が放電したことにより通電する電流を検出し、過電圧が発生していることを演算処理回路９に伝える。演算処理回路９は過電圧が発生したことにより灯器２が断芯したと判断して灯器２の断芯による変流器１の二次側の開放を復帰させて灯器断芯検出装置の電源電圧を確保するため、リレー５をメイク状態にして変流器１の二次側から供給される電流をバイパスさせて電源回路10に供給すると共に、灯器２の断芯による変流器１の二次側の開放を復帰させて高電圧の発生を復帰させる。また演算処理回路９は灯器２が断芯したことを伝送制御回路８に情報を伝え、伝送制御回路８から伝送路６を介して外部装置７に灯器が断芯したことを伝える。
【０００７】
【発明の実施の形態】
（第１の実施の形態）
本発明を、図２に示す構成図を用いて説明する。変流器１の二次側から供給される電流を入力とし、この電流を装置内部の電源電流とすると共に灯器２に出力する灯器断芯検出装置であり、灯器２が断芯したことにより変流器１の二次側が開放して発生する高電圧からアレスタ11の放電により灯器断芯検出装置を保護する過電圧保護回路３と、この過電圧保護回路３が動作したか否かにより所定レベルの過電圧が発生したか否かをセンサー12検出する過電圧検出回路４と、灯器２の前段にて電流をバイパスさせるためのリレー５と、システム的に伝送路６で接続された外部装置７に情報を伝えるための伝送制御回路８と、リレーと各回路を制御するための演算処理回路９と、入力された電流より内部電源電圧を確保する電源回路10より構成された灯器断芯検出装置である。
【０００８】
変流器１の二次側から供給される電流を入力して灯器２にこの電流を出力している時に断芯すると、変流器１の二次側が開放状態となり高電圧が発生する。灯器２が断芯していない状態ではアレスタ11により開放を保持している過電圧保護回路３は、高電圧が印加されると所定の電圧レベルでアレスタ11が放電を開始して短絡状態となり、放電したことにより通電される電流を過電圧検出回路４のセンサー12で検出する。過電圧検出回路４は電流を検出したことにより過電圧が発生したことを演算処理回路９に伝え、演算処理回路９は灯器２が断芯したと判断する。断芯を判断した演算処理回路９は灯器２が断芯したことにより変流器１の二次側から供給される電流が電源回路10に供給されずに灯器断芯検出装置が動作できなくなることを回避するためリレー５をメイク状態にして変流器１の二次側からの電流をリレー５の接点でバイパスさせて電源回路10に変流器１の二次側からの電流を供給すると共に、灯器２が断芯したことによる変流器１の二次側の開放状態と高電圧の発生を復帰させる。また、演算処理回路９は灯器２が断芯したことを伝送制御回路８に伝え、伝送制御回路８は伝送路６を介して外部装置７に灯器２が断芯したことを伝える。
【０００９】
以上のような実施例により、空港の滑走路・誘導路等に設置される誘導灯・制御灯等の灯器を制御する航空機誘導システム等に於いて、灯器ごとに本灯器断芯検出装置を設置することにより、灯器が断芯した場合に断芯を即時に検出し、伝送路を介して外部装置に断芯を伝えることができるため、人為的に灯器の場所に行って断芯を目視確認することなく発見でき、断芯を発見するまでの時間と労力を大幅に短縮できる。
さらに、灯器の断芯を即時に発見することができるため、断芯した灯器の交換も即時にできるようになり、システムの信頼性を向上することができる。
【００１０】
（第２の実施の形態）
図２の構成図に於いて、演算処理回路９が過電圧検出回路４から過電圧保護回路３のアレスタ11が放電した時に通電する電流を検出した情報を受け取りリレー５をメイク状態にしてリレー５の接点を短絡させて変流器１の二次側から供給される電流をバイパスした後に、所定の時間経過後にリレー５をブレイク状態にしてリレー５の接点を開放させて変流器１の二次側から供給される電流を灯器２に流した時に、過電圧検出回路４が再度過電圧を検出した場合、演算処理回路９は灯器２が断芯したと判断して外部装置７に灯器２が断芯したことを伝える。
【００１１】
上記のように、過電圧検出回路４にて過電圧を検出した後にリレー５を所定の周期でメイクとブレイクを行い、過電圧検出回路４にて２回連続して過電圧を検出した場合にのみ、灯器２が断芯したと判断するため、ノイズ等による一過性の過電圧による誤検出を防止することができる。
【００１２】
（第３の実施の形態）
図３の構成図のように、図２の構成図のリレーと並列に、変流器１の二次側から供給される電流を内部でバイパス制御することにより灯器２に流す電流を制御する調光回路13が接続された構成の場合、灯器２に流す電流を極端に少なく調光回路13で制御する時に、所定の周期で、灯器２の発光に影響を与えない時間、所定の高いレベルの電流を流す制御を演算処理回路９から調光回路13に指令し、灯器２が断芯した場合に、灯器２の発光に影響を与えない時間流した高いレベルの電流により、変流器１の二次側の開放状態により発生する電圧を、過電圧保護回路３のアレスタ11が放電できる高い電圧レベルにさせることができるため、灯器２を消灯状態としている場合でも灯器２が断芯したことを検出して外部装置７に伝えることができる。
【００１３】
（第４の実施の形態）
図４の構成図のように、図２の構成図の灯器２が複数個直列に接続されて、高電圧を印加することにより短絡動作するフィルムカットアウト14を灯器断芯検出装置の外部に複数個の灯器２と個々に並列に接続されている構成の場合、複数個の灯器２のどれかが断芯した時、演算処理回路９が過電圧検出回路４から過電圧保護回路３のアレスタ11が放電した時に通電する電流を検出した情報を受け取り、灯器２のいずれかが断芯したと判断した後リレー５を所定の周期でメイクとブレイクを交互に制御して、リレー５をメイクした時に変流器１の二次側から供給される電流をリレー５の接点でバイパスさせて灯器断芯検出装置の電源の確保と、リレー５をブレイクした時に変流器１の二次側の開放により発生する高電圧が過電圧保護回路３のアレスタ11で放電した所定レベルの電圧を断芯した灯器２に接続されたフィルムカットアウト14に印加することを交互に繰り返し行う。このリレー５のメイクとブレイク動作により断芯した灯器２に接続されたフィルムカットアウト14が短絡動作して電流をバイパスして、変流器１の二次側の開放状態が復帰して高電圧が発生しなくなり過電圧検出回路４が過電圧を検出しなくなるまで行うことにより、灯器断芯検出装置に接続された複数の灯器２のいずれかに断芯が発生していることを検出すると共に、断芯した灯器以外は点灯状態を保持可能とすることができる。
【００１４】
（第５の実施の形態）
図４の構成図のように、図２の構成図の灯器２が複数個直列に接続されて、高電圧を印加することにより短絡動作するフィルムカットアウト14を灯器断芯検出装置の外部に複数個の灯器２と個々に並列に接続されている構成の場合、複数個の灯器２のどれかが断芯した時、演算処理回路９が過電圧検出回路４から過電圧保護回路３のアレスタ11が放電した時に通電する電流を検出した情報を受け取りリレー５を所定の周期でメイクとブレイクを交互に制御して、リレー５をメイクした時に変流器１の二次側から供給される電流をリレー５の接点でバイパスさせて灯器断芯検出装置の電源の確保と、リレー５をブレイクした時に変流器１の二次側の開放により発生する高電圧が過電圧保護回路３のアレスタ11で放電した所定レベルの電圧を断芯した灯器２に接続されたフィルムカットアウト14に印加することを交互に繰り返し所定の回数まで、過電圧検出回路４が過電圧を検出しなくなるまで行う。所定の回数まで行っても断芯した灯器２に接続されたフィルムカットアウト14が短絡動作せずに過電圧検出回路４が過電圧を検出した場合は、リレー５をメイク状態にして灯器断芯検出装置の内部で変流器１の二次側からの電流をバイパスさせる。
【００１５】
上記のように、灯器２が複数個直列に接続された場合に、複数個の灯器２のどれかが断芯して、断芯した灯器２に接続されたフィルムカットアウト14が短絡動作しない場合や、短絡動作するまでに長時間を要する場合に、灯器２の断芯による変流器１の二次側の開放状態を所定の時間で復帰させて、変流器１の一次側に与える影響を抑えシステム的な信頼性を向上させることができる。
【００１６】
（第６の実施の形態）
図４の構成図のように、図２の構成図の灯器２が複数個直列に接続されて、高電圧を印加することにより短絡動作するフィルムカットアウト14を灯器断芯検出装置の外部に複数個の灯器２と個々に並列に接続されている構成の場合、複数個の灯器２のどれかが断芯した時、演算処理回路９が過電圧検出回路４から過電圧保護回路３のアレスタ11が放電した時に通電する電流を検出した情報を受け取りリレー５を所定の周期でメイクとブレイクを交互に制御して、リレー５をメイクした時に変流器１の二次側から供給される電流をリレー５の接点でバイパスさせて灯器断芯検出装置の電源の確保と、リレー５をブレイクした時に変流器１の二次側の開放により発生する高電圧が過電圧保護回路３のアレスタ11で放電した所定レベルの電圧を断芯した灯器２に接続されたフィルムカットアウト14に印加することを交互に繰り返し所定の回数まで無条件に行う。所定の回数まで行っても断芯した灯器２に接続されたフィルムカットアウト14が短絡動作せずに過電圧検出回路４が過電圧を検出した場合は、リレー５をメイク状態にしてリレー５の接点を短絡し灯器断芯検出装置の内部で変流器１の二次側からの電流をバイパスさせる。
【００１７】
上記のように、灯器２が複数個直列に接続された場合に、複数個の灯器２のどれかが断芯して、断芯した灯器２に接続されたフィルムカットアウト14が短絡動作しない場合や、短絡動作するまでに長時間を要する場合に、灯器２の断芯による変流器１の二次側の開放状態を所定の時間で復帰させて、変流器１の一次側に与える影響を抑えシステム的な信頼性を向上させることができる。
【００１８】
（第７の実施の形態）
図５の構成図のように、図４の構成図のリレー５と並列に変流器１の二次側から供給される電流を内部でバイパス制御することにより灯器２に流す電流を制御する調光回路13を接続した構成の場合、複数個の灯器２に流す電流を変流器１の二次側から供給される電流より低く調光回路13で制御して出力している時に、複数個の灯器２のどれかが断芯した時に、演算処理回路９が過電圧検出回路４から過電圧保護回路３のアレスタ11が放電した時に通電する電流を検出した情報を受け取り、演算処理回路９からの調光回路13の制御を停止して変流器１の二次側からの電流全てが灯器２に流れるようにして、変流器１の二次側の開放状態により発生する電圧を高くし、断芯した灯器２に接続されたフィルムカットアウト14の短絡動作をし易くできる。
【００１９】
（第８の実施の形態）
図５の構成図のように、図４の構成図のリレー５と並列に変流器１の二次側から供給される電流を内部でバイパス制御することにより灯器２に流す電流を制御する調光回路13を接続した構成の場合、複数個の灯器２に流す電流を変流器１の二次側から供給される電流より低く調光回路13で制御して出力している時に、複数個の灯器２のどれかが断芯した時に、演算処理回路９が過電圧検出回路４から過電圧保護回路３のアレスタ11が放電した時に通電する電流を検出した情報を受け取り、演算処理回路９からの調光回路13の制御を停止して変流器１の二次側からの電流全てが灯器２に流れるようにして、変流器１の二次側の開放状態により発生する電圧を高くし、演算処理回路９からリレー５を所定の周期でメイクとブレイクを交互に制御して、リレー５をメイクした時に変流器１の二次側から供給される電流をリレー５の接点でバイパスさせて灯器断芯検出装置の電源の確保と、リレー５をブレイクした時に変流器１の二次側の開放により発生する高電圧が過電圧保護回路３のアレスタ11で放電した所定レベルの電圧を断芯した灯器２に接続されたフィルムカットアウト14に印加することを交互に繰り返し所定の回数まで、過電圧検出回路４が過電圧を検出しなくなるまで行う。所定の回数まで行っても断芯した灯器２に接続されたフィルムカットアウト14が短絡動作せずに過電圧検出回路４が過電圧を検出した場合は、リレー５をメイク状態にしてリレー５の接点を短絡し灯器断芯検出装置の内部で変流器１の二次側からの電流をバイパスさせる。
【００２０】
上記のように、調光回路13により複数個の灯器２に流す電流を制御している時に複数個のどれかの灯器２が断芯しても、断芯した灯器に接続されたフィルムカットアウト14に印加する電圧を高くすることができるため、フィルムカットアウト14の短絡動作をし易くできる。
【００２１】
また、断芯した灯器２に接続されたフィルムカットアウト14が短絡動作しない場合や、短絡動作するまでに長時間を要する場合に、灯器２の断芯による変流器１の二次側の開放状態を所定の時間で復帰させて、変流器１の一次側に与える影響を抑えシステム的な信頼性を向上させることができる。
【００２２】
（第９の実施の形態）
図５の構成図のように、図４の構成図のリレー５と並列に変流器１の二次側から供給される電流を内部でバイパス制御することにより灯器２に流す電流を制御する調光回路13を接続した構成の場合、複数個の灯器２に流す電流を変流器１の二次側から供給される電流より低く調光回路13で制御して出力している時に、複数個の灯器２のどれかが断芯した時に、演算処理回路９が過電圧検出回路４から過電圧保護回路３のアレスタ11が放電した時に通電する電流を検出した情報を受け取り、演算処理回路９からの調光回路13の制御を停止して変流器１の二次側からの電流全てが灯器２に流れるようにして、変流器１の二次側の開放状態により発生する電圧を高くし、演算処理回路９からリレー５を所定の周期でメイクとブレイクを交互に制御して、リレー５をメイクした時に変流器１の二次側から供給される電流をリレー５の接点でバイパスさせて灯器断芯検出装置の電源の確保と、リレー５をブレイクした時に変流器１の二次側の開放により発生する高電圧が過電圧保護回路３のアレスタ11で放電した所定レベルの電圧を断芯した灯器２に接続されたフィルムカットアウト14に印加することを交互に繰り返し所定の回数まで無条件に行う。所定の回数まで行っても断芯した灯器２に接続されたフィルムカットアウト14が短絡動作せずに過電圧検出回路４が過電圧を検出した場合は、リレー５をメイク状態にしてリレー５の接点を短絡し灯器断芯検出装置の内部で変流器１の二次側からの電流をバイパスさせる。
【００２３】
上記のように、調光回路13により複数個の灯器２に流す電流を制御している時に複数個のどれかの灯器２が断芯しても、断芯した灯器に接続されたフィルムカットアウト14に印加する電圧を高くすることができるため、フィルムカットアウト14の短絡動作をし易くできる。
【００２４】
また、断芯した灯器２に接続されたフィルムカットアウト14が短絡動作しない場合や、短絡動作するまでに長時間を要する場合に、灯器２の断芯による変流器１の二次側の開放状態を所定の時間で復帰させて、変流器１の一次側に与える影響を抑えシステム的な信頼性を向上させることができる。
【００２５】
（第10の実施の形態）
図６の構成図のように、図４の構成図の過電圧保護回路３をアレスタ11とアレスタ15とアレスタの接続を切り替えるための切替リレー16で構成し、灯器２が断芯していない状態では切替リレー16をメイク状態にして切替リレー16の接点を短絡状態にしておく。複数個の灯器２のどれかが断芯して変流器１の二次側の開放状態により高電圧が発生すると、高電圧は過電圧保護回路３のアレスタ11に印加されて、アレスタ11は所定の電圧レベルで放電し、放電したことにより通電する電流を過電圧検出回路４のセンサー12で検出して演算処理回路９に伝え、演算処理回路９はリレー５をメイク状態にして、変流器１の二次側から供給される電流を電源回路10に供給して灯器断芯検出装置の電源を確保した後に、切替リレー16をブレイク状態にし切替リレー16の接点を開放させてアレスタ11とアレスタ15を直列接続状態にする。アレスタ11とアレスタ15が直列接続状態になるとアレスタが放電を開始する電圧レベルはアレスタ11の放電を開始する電圧レベルとアレスタ15が放電を開始する電圧レベルの和になり、フィルムカットアウト14に印加される電圧が高くなる。
【００２６】
上記のように、過電圧保護回路３のアレスタ11とアレスタ15の接続構成を切り替えることにより、過電圧保護回路３が放電を開始する電圧レベルを断芯検出前に低くしておき、断芯検出後は高くすることができるため、確実に灯器２の断芯を検出し、断芯した灯器２に接続されたフィルムカットアウト14を短絡動作させることができる。
【００２７】
（第11の実施の形態）
図６の構成図のように、図４の構成図の過電圧保護回路３をアレスタ11とアレスタ15とアレスタの接続を切り替えるための切替リレー16で構成し、灯器２が断芯していない状態では切替リレー16をメイク状態にして切替リレー16の接点を短絡状態にしておく。複数個の灯器２のどれかが断芯して変流器１の二次側の開放状態により高電圧が発生すると、高電圧は過電圧保護回路３のアレスタ11に印加されて、アレスタ11は所定の電圧レベルで放電し、放電したことにより通電する電流を過電圧検出回路４のセンサー12で検出して演算処理回路９に伝え、演算処理回路９はリレー５をメイク状態にして、変流器１の二次側から供給される電流を電源回路10に供給して灯器断芯検出装置の電源を確保した後に、切替リレー16をブレイク状態にし切替リレー16の接点を開放させてアレスタ11とアレスタ15を直列接続状態にした後、演算処理回路９はリレー５を所定の周期でメイクとブレイクを交互に制御して、リレー５をメイクした時に変流器１の二次側から供給される電流をリレー５の接点でバイパスさせて灯器断芯検出装置の電源の確保と、リレー５をブレイクした時に変流器１の二次側の開放により発生する高電圧が過電圧保護回路３のアレスタ11とアレスタ15が直列に接続した状態で放電した所定レベルの電圧を断芯した灯器２に接続されたフィルムカットアウト14に印加することとを交互に繰り返し行い、断芯した灯器２に接続されたフィルムカットアウト14が短絡動作して電流をバイパスして、変流器１の二次側の開放状態が復帰して高電圧が発生しなくなり過電圧検出回路４が過電圧を検出しなくなるまで行う。
【００２８】
上記のように、過電圧保護回路３のアレスタ11とアレスタ15の接続構成を切り替えることにより、過電圧保護回路３が放電を開始する電圧レベルを断芯検出前に低くしておき、断芯検出後は高くすることができるため、確実に灯器２の断芯を検出し、断芯した灯器２に接続されたフィルムカットアウト14を、より確実に短絡動作させることができる。
【００２９】
（第12の実施の形態）
図６の構成図のように、図４の構成図の過電圧保護回路３をアレスタ11とアレスタ15とアレスタの接続を切り替えるための切替リレー16で構成し、灯器２が断芯していない状態では切替リレー16をメイク状態にして切替リレー16の接点を短絡状態にしておく。複数個の灯器２のどれかが断芯して変流器１の二次側の開放状態により高電圧が発生すると、高電圧は過電圧保護回路３のアレスタ11に印加されて、アレスタ11は所定の電圧レベルで放電し、放電したことにより通電する電流を過電圧検出回路４のセンサー12で検出して演算処理回路９に伝え、演算処理回路９はリレー５をメイク状態にして、変流器１の二次側から供給される電流を電源回路10に供給して灯器断芯検出装置の電源を確保した後に、切替リレー16をブレイク状態にし切替リレー16の接点を開放させてアレスタ11とアレスタ15を直列接続状態にした後、演算処理回路９はリレー５を所定の周期でメイクとブレイクを交互に制御して、リレー５をメイクした時に変流器１の二次側から供給される電流をリレー５の接点でバイパスさせて灯器断芯検出装置の電源の確保と、リレー５をブレイクした時に変流器１の二次側の開放により発生する高電圧が過電圧保護回路３のアレスタ11とアレスタ15が直列に接続した状態で放電した所定レベルの電圧を断芯した灯器２に接続されたフィルムカットアウト14に印加することとを交互に繰り返し所定の回数まで、過電圧検出回路４が過電圧を検出しなくなるまで行う。所定の回数まで行っても断芯した灯器２に接続されたフィルムカットアウト14が短絡動作せずに過電圧検出回路４が過電圧を検出した場合は、リレー５をメイク状態にしてリレー５の接点を短絡し灯器断芯検出装置の内部で変流器１の二次側からの電流をバイパスさせる。
【００３０】
上記のように、過電圧保護回路３のアレスタ11とアレスタ15の接続構成を切り替えることにより、過電圧保護回路３が放電を開始する電圧レベルを断芯検出前に低くしておき、断芯検出後は高くすることができるため、確実に灯器２の断芯を検出し、断芯した灯器２に接続されたフィルムカットアウト14を、より確実に短絡動作させることができる。
【００３１】
また、断芯した灯器２に接続されたフィルムカットアウト14が短絡動作しない場合や、短絡動作するまでに長時間を要する場合に、灯器２の断芯による変流器１の二次側の開放状態を所定の時間で復帰させて、変流器１の一次側に与える影響を抑えシステム的な信頼性を向上させることができる。
【００３２】
（第13の実施の形態）
図６の構成図のように、図４の構成図の過電圧保護回路３をアレスタ11とアレスタ15とアレスタの接続を切り替えるための切替リレー16で構成し、灯器２が断芯していない状態では切替リレー16をメイク状態にして切替リレー16の接点を短絡状態にしておく。複数個の灯器２のどれかが断芯して変流器１の二次側の開放状態により高電圧が発生すると、高電圧は過電圧保護回路３のアレスタ11に印加されて、アレスタ11は所定の電圧レベルで放電し、放電したことにより通電する電流を過電圧検出回路４のセンサー12で検出して演算処理回路９に伝え、演算処理回路９はリレー５をメイク状態にして、変流器１の二次側から供給される電流を電源回路10に供給して灯器断芯検出装置の電源を確保した後に、切替リレー16をブレイク状態にし切替リレー16の接点を開放させてアレスタ11とアレスタ15を直列接続状態にした後、演算処理回路９はリレー５を所定の周期でメイクとブレイクを交互に制御して、リレー５をメイクした時に変流器１の二次側から供給される電流をリレー５の接点でバイパスさせて灯器断芯検出装置の電源の確保と、リレー５をブレイクした時に変流器１の二次側の開放により発生する高電圧が過電圧保護回路３のアレスタ11とアレスタ15が直列に接続した状態で放電した所定レベルの電圧を断芯した灯器２に接続されたフィルムカットアウト14に印加することとを交互に繰り返し所定の回数まで無条件に行う。所定の回数まで行っても断芯した灯器２に接続されたフィルムカットアウト14が短絡動作せずに過電圧検出回路４が過電圧を検出した場合は、リレー５をメイク状態にしてリレー５の接点を短絡し灯器断芯検出装置の内部で変流器１の二次側からの電流をバイパスさせる。
【００３３】
上記のように、過電圧保護回路３のアレスタ11とアレスタ15の接続構成を切り替えることにより、過電圧保護回路３が放電を開始する電圧レベルを断芯検出前に低くしておき、断芯検出後は高くすることができるため、確実に灯器２の断芯を検出し、断芯した灯器２に接続されたフィルムカットアウト14を、より確実に短絡動作させることができる。
【００３４】
また、断芯した灯器２に接続されたフィルムカットアウト14が短絡動作しない場合や、短絡動作するまでに長時間を要する場合に、灯器２の断芯による変流器１の二次側の開放状態を所定の時間で復帰させて、変流器１の一次側に与える影響を抑えシステム的な信頼性を向上させることができる。
【００３５】
（第14の実施の形態）
図７の構成図のように、図５の構成図の過電圧保護回路３をアレスタ11とアレスタ15とアレスタの接続を切り替えるための切替リレー16で構成し、灯器２が断芯していない状態では切替リレー16をメイク状態にして切替リレー16の接点を短絡状態にしておく。複数個の灯器２に流す電流を変流器１の二次側から供給される電流より低く調光回路13で制御して出力している時に、複数個の灯器２のどれかが断芯した時に、演算処理回路９が過電圧検出回路４から過電圧保護回路３のアレスタ11が放電した時に通電する電流を検出した情報を受け取り、演算処理回路９からの調光回路13の制御を停止して変流器１の二次側からの電流全てが灯器２に流れるようにして、変流器１の二次側の開放状態により発生する電圧を高くし、演算処理回路９はリレー５をメイク状態にして、変流器１の二次側から供給される電流を電源回路10に供給して灯器断芯検出装置の電源を確保した後に、切替リレー16をブレイク状態にし切替リレー16の接点を開放させてアレスタ11とアレスタ15を直列接続状態にした後、演算処理回路９はリレー５を所定の周期でメイクとブレイクを交互に制御して、リレー５をメイクした時に変流器１の二次側から供給される電流をリレー５の接点でバイパスさせて灯器断芯検出装置の電源の確保と、リレー５をブレイクした時に変流器１の二次側の開放により発生する高電圧が過電圧保護回路３のアレスタ11とアレスタ15が直列に接続した状態で放電した所定レベルの電圧を断芯した灯器２に接続されたフィルムカットアウト14に印加することとを交互に繰り返し所定の回数まで、過電圧検出回路４が過電圧を検出しなくなるまで行う。所定の回数まで行っても断芯した灯器２に接続されたフィルムカットアウト14が短絡動作せずに過電圧検出回路４が過電圧を検出した場合は、リレー５をメイク状態にしてリレー５の接点を短絡し灯器断芯検出装置の内部で変流器１の二次側からの電流をバイパスさせる。
【００３６】
上記のように、調光回路13により複数個の灯器２に流す電流を制御している時に複数個のどれかの灯器２が断芯しても、断芯した灯器に接続されたフィルムカットアウト14に印加する電圧を高くすることができるため、フィルムカットアウト14の短絡動作をし易くできる。
【００３７】
また、過電圧保護回路３のアレスタ11とアレスタ15の接続構成を切り替えることにより、過電圧保護回路３が放電を開始する電圧レベルを断芯検出前に低くしておき、断芯検出後は高くすることができるため、確実に灯器２の断芯を検出し、断芯した灯器２に接続されたフィルムカットアウト14を、より確実に短絡動作させることができる。
【００３８】
さらに、断芯した灯器２に接続されたフィルムカットアウト14が短絡動作しない場合や、短絡動作するまでに長時間を要する場合に、灯器２の断芯による変流器１の二次側の開放状態を所定の時間で復帰させて、変流器１の一次側に与える影響を抑えシステム的な信頼性を向上させることができる。
【００３９】
（第15の実施の形態）
図７の構成図のように、図５の構成図の過電圧保護回路３をアレスタ11とアレスタ15とアレスタの接続を切り替えるための切替リレー16で構成し、灯器２が断芯していない状態では切替リレー16をメイク状態にして切替リレー16の接点を短絡状態にしておく。複数個の灯器２に流す電流を変流器１の二次側から供給される電流より低く調光回路13で制御して出力している時に、複数個の灯器２のどれかが断芯した時に、演算処理回路９が過電圧検出回路４から過電圧保護回路３のアレスタ11が放電した時に通電する電流を検出した情報を受け取り、演算処理回路９から調光回路13の制御を停止して変流器１の二次側からの電流全てが灯器２に流れるようにして、変流器１の二次側の開放状態により発生する電圧を高くし、演算処理回路９はリレー５をメイク状態にして、変流器１の二次側から供給される電流を電源回路10に供給して灯器断芯検出装置の電源を確保した後に、切替リレー16をブレイク状態にし切替リレー16の接点を開放させてアレスタ11とアレスタ15を直列接続状態にした後、演算処理回路９はリレー５を所定の周期でメイクとブレイクを交互に制御して、リレー５をメイクした時に変流器１の二次側から供給される電流をリレー５の接点でバイパスさせて灯器断芯検出装置の電源の確保と、リレー５をブレイクした時に変流器１の二次側の開放により発生する高電圧が過電圧保護回路３のアレスタ11とアレスタ15が直列に接続した状態で放電した所定レベルの電圧を断芯した灯器２に接続されたフィルムカットアウト14に印加することとを交互に繰り返し所定の回数まで無条件に行う。所定の回数まで行っても断芯した灯器２に接続されたフィルムカットアウト14が短絡動作せずに過電圧検出回路４が過電圧を検出した場合は、リレー５をメイク状態にしてリレー５の接点を短絡し灯器断芯検出装置の内部で変流器１の二次側からの電流をバイパスさせる。
【００４０】
上記のように、調光回路13により複数個の灯器２に流す電流を制御している時に複数個のどれかの灯器２が断芯しても、断芯した灯器に接続されたフィルムカットアウト14に印加する電圧を高くすることができるため、フィルムカットアウト14の短絡動作をし易くできる。
【００４１】
また、過電圧保護回路３のアレスタ11とアレスタ15の接続構成を切り替えることにより、過電圧保護回路３が放電を開始する電圧レベルを断芯検出前に低くしておき、断芯検出後は高くすることができるため、確実に灯器２の断芯を検出し、断芯した灯器２に接続されたフィルムカットアウト14を、より確実に短絡動作させることができる。
【００４２】
さらに、断芯した灯器２に接続されたフィルムカットアウト14が短絡動作しない場合や、短絡動作するまでに長時間を要する場合に、灯器２の断芯による変流器１の二次側の開放状態を所定の時間で復帰させて、変流器１の一次側に与える影響を抑えシステム的な信頼性を向上させることができる。
【００４３】
【発明の効果】
以上のような実施例により、空港の滑走路・誘導路等に設置される誘導灯・制御灯等の灯器を制御する航空機誘導システム等に於いて、灯器ごとに本灯器断芯検出装置を設置することにより、灯器が断芯した場合に断芯を即時に検出し、伝送路を介して外部装置に断芯を伝えることができるため、人為的に灯器の場所に行って断芯を目視確認することなく発見でき、断芯を発見するまでの時間と労務を大幅に短縮できる。
【００４４】
また、灯器の断芯を即時に発見することができるため、断芯した灯器の交換も即時にできるようになり、システムの信頼性を向上することができる。
また、過電圧検出回路にて過電圧を検出した後にリレーを所定の周期でメイクとブレイクを行い、過電圧検出回路にて２回連続して過電圧を検出した場合にのみ、灯器が断芯したと判断するため、ノイズ等による一過性の過電圧による誤検出を防止することができる。
【００４５】
また、変流器の二次側から供給される電流を内部でバイパス制御することにより灯器に流す電流を制御する調光回路を灯器断芯検出装置の内部に接続して、調光回路で灯器に流す電流を制御している場合でも断芯を検出することができる。
【００４６】
また、調光回路により灯器を消灯制御している場合に、所定の周期で灯器の発光に影響を与えない時間高いレベルの電流を流すことにより、灯器が断芯した場合でも、過電圧検出回路で検出できる電圧レベルを発生させることができるため、灯器が断芯したことを検出して外部装置に伝えることができる。
【００４７】
また、複数個の灯器を直列に接続した場合でも、複数個のどれかの灯器の断芯を検出することができる。
また、複数個の灯器を直列に接続した場合に、複数個の灯器のどれかが断芯して、断芯した灯器に接続されたフィルムカットアウトが短絡動作しない場合や、短絡動作するまでに長時間を要する場合に、変流器の二次側の開放状態を所定の時間で復帰させることができるため、変流器の一次側に及ぼす影響を抑えることができ、システム的な信頼性を向上させることができる。
【００４８】
また、過電圧保護回路のアレスタの接続構成を切り替えることにより、確実に灯器断芯を検出し、断芯した灯器に接続されたフィルムカットアウトを、より確実に短絡動作させることができる。
【図面の簡単な説明】
【図１】本発明の一実施の形態の灯器断芯検出装置の構成図。
【図２】本発明の他の実施の形態の灯器断芯検出装置の構成図。
【図３】本発明の他の実施の形態の灯器断芯検出装置の構成図。
【図４】本発明の他の実施の形態の灯器断芯検出装置の構成図。
【図５】本発明の他の実施の形態の灯器断芯検出装置の構成図。
【図６】本発明の他の実施の形態の灯器断芯検出装置の構成図。
【図７】本発明の他の実施の形態の灯器断芯検出装置の構成図。
【図８】従来の技術の構成図。
【符号の説明】
１…変流器
２…灯器
３…過電圧保護回路
４…過電圧検出回路
５…リレー
６…伝送路
７…外部装置
８…伝送制御回路
９…演算処理回路
10…電源回路
11…アレスタ
12…センサー
13…調光回路
14…フィルムカットアウト
15…アレスタ
16…切替リレー[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lamp breakage detecting device in an aircraft guide light monitoring system or the like that controls a lamp such as a guide light or a control light installed on a runway or taxiway at an airport, and more particularly, a lamp The present invention relates to a lamp breakage detection device that detects that the light emitting unit of the lamp has been broken and reports that the lamp has been broken to an external device connected through a transmission path.
[0002]
[Prior art]
FIG. 8 shows a configuration diagram of a conventional technique. In the conventional aircraft guidance monitoring system, a plurality of current transformers are connected in series to a constant current power supply device, and only one lamp is connected to the secondary side of the current transformer. There are cases where multiple lamps are connected in series on the next side, and when connecting the lamps in series, a film cutout that is short-circuited when a high voltage is applied in parallel with each lamp is connected. When only one lamp is connected to the secondary side of the current transformer, if this lamp is disconnected, the disconnected lamp is turned off and the secondary of the connected current transformer When the side is open, the high voltage remains generated, and if multiple lamps are connected in series on the secondary side of the current transformer, if the lamp is broken, the secondary of the current transformer A high voltage is generated when the side is opened, and this film is connected in parallel to the lamp that has been disconnected. Applied to the out-out, bypassing the current supplied from the secondary side of the current transformer, supplying the current from the secondary side of the current transformer to other lamps that are not disconnected, The lighting state was kept.
[0003]
[Problems to be solved by the invention]
According to the above-described prior art, the disconnection of the lamp has only a means for visually detecting that the lamp does not light up, and the lamp is disconnected among the vast number of lamps installed at the airport. In order to discover the lamp, it was necessary to go to all the lamps artificially and check the lamps one by one, so it took time and effort to discover the broken lamps.
[0004]
In addition, since it is not known when the lamp is broken, the act of finding the broken lamp must be performed at predetermined intervals.
The present invention has been made to solve the above-described problems, and detects the disconnection of a lamp without degrading the economic efficiency and reliability of the system, and transmits it to an external device via a transmission line. It is an object of the present invention to provide a lamp disconnection detecting device that makes it possible to immediately detect that a lamp has been disconnected.
[0005]
[Means for Solving the Problems]
The present invention will be described with reference to the block diagram shown in FIG. This is a lamp breakage detecting device that takes the current supplied from the secondary side of the current transformer 1 as an input and uses this current as the power supply current inside the apparatus and outputs it to the lamp 2, and the lamp 2 is broken. Thus, an overvoltage protection circuit 3 that protects the lamp disconnection detecting device from a high voltage that is generated when the secondary side of the current transformer 1 is opened, and an overvoltage of a predetermined level depends on whether or not the overvoltage protection circuit 3 is operated. For transmitting information to an overvoltage detection circuit 4 for detecting whether or not it has occurred, a relay 5 for bypassing current in the front stage of the lamp 2, and an external device 7 connected systematically by a transmission line 6 The lamp breakage detecting device is composed of a transmission control circuit 8, an arithmetic processing circuit 9 for controlling the relay and each circuit, and a power supply circuit 10 that secures an internal power supply voltage from an input current.
[0006]
When the current supplied from the secondary side of the current transformer 1 is input and this current is output to the lamp device 2, if the lamp device 2 is disconnected, the secondary side of the current transformer 1 is opened and a high voltage is applied. Will occur. When the lamp unit 2 is not disconnected, the overvoltage protection circuit 3 that is kept open is discharged at a predetermined voltage level when the lamp unit 2 is disconnected, and the high voltage is set to a predetermined level. Reduce to voltage level. The overvoltage detection circuit 4 detects a current that is energized when the overvoltage protection circuit 3 is discharged, and notifies the arithmetic processing circuit 9 that an overvoltage has occurred. The arithmetic processing circuit 9 determines that the lamp 2 is disconnected due to the occurrence of an overvoltage, and restores the secondary side opening of the current transformer 1 due to the disconnection of the lamp 2 to restore the lamp disconnection detecting device. In order to secure the power supply voltage, the relay 5 is set in the make state to bypass the current supplied from the secondary side of the current transformer 1 and supply it to the power supply circuit 10. The release of the secondary side is restored, and the generation of the high voltage is restored. The arithmetic processing circuit 9 informs the transmission control circuit 8 that the lamp 2 has been disconnected, and notifies the external device 7 that the lamp has been disconnected from the transmission control circuit 8 via the transmission path 6.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
The present invention will be described with reference to the block diagram shown in FIG. This is a lamp breakage detecting device that takes the current supplied from the secondary side of the current transformer 1 as an input and uses this current as the power supply current inside the apparatus and outputs it to the lamp 2, and the lamp 2 is broken. Therefore, the overvoltage protection circuit 3 that protects the lamp disconnection detecting device from the high voltage generated by opening the secondary side of the current transformer 1 by the discharge of the arrester 11, and whether or not the overvoltage protection circuit 3 is operated. An overvoltage detection circuit 4 for detecting whether or not an overvoltage of a predetermined level has occurred, a relay 5 for bypassing the current in the previous stage of the lamp 2, and an external device connected systematically by a transmission line 6 7 is composed of a transmission control circuit 8 for transmitting information to 7, an arithmetic processing circuit 9 for controlling the relay and each circuit, and a power supply circuit 10 for securing an internal power supply voltage from the input current. It is a detection device.
[0008]
When the current supplied from the secondary side of the current transformer 1 is input and the current is output to the lamp device 2, if the core is disconnected, the secondary side of the current transformer 1 is opened and a high voltage is generated. When the lamp 2 is not disconnected, the overvoltage protection circuit 3 that is kept open by the arrester 11 is short-circuited when the high voltage is applied, and the arrester 11 starts discharging at a predetermined voltage level. The current that is energized by discharging is detected by the sensor 12 of the overvoltage detection circuit 4. The overvoltage detection circuit 4 informs the arithmetic processing circuit 9 that an overvoltage has occurred due to detection of the current, and the arithmetic processing circuit 9 determines that the lamp unit 2 has been broken. The arithmetic processing circuit 9 that has determined the disconnection can operate the lamp disconnection detection device without supplying the current supplied from the secondary side of the current transformer 1 to the power supply circuit 10 because the lamp 2 is disconnected. In order to avoid the loss, the relay 5 is put into a make state and the current from the secondary side of the current transformer 1 is bypassed at the contact of the relay 5 to supply the current from the secondary side of the current transformer 1 to the power supply circuit 10. At the same time, the open state of the secondary side of the current transformer 1 and the generation of the high voltage due to the disconnection of the lamp 2 are restored. The arithmetic processing circuit 9 notifies the transmission control circuit 8 that the lamp 2 has been disconnected, and the transmission control circuit 8 notifies the external device 7 that the lamp 2 has been disconnected via the transmission path 6.
[0009]
According to the above-described embodiment, in the aircraft guidance system that controls the lamps such as the guide lights and control lights installed on the runways and taxiways at the airport, this lamp breakage detection is detected for each lamp. By installing the device, if the lamp breaks, the breakage can be detected immediately and communicated to the external device via the transmission line. The breakage can be found without visual confirmation, and the time and labor required to find the breakage can be greatly reduced.
Furthermore, since the disconnection of the lamp can be detected immediately, the disconnected lamp can be replaced immediately, and the reliability of the system can be improved.
[0010]
(Second Embodiment)
In the configuration diagram of FIG. 2, the arithmetic processing circuit 9 receives information from the overvoltage detection circuit 4 that the current flowing when the arrester 11 of the overvoltage protection circuit 3 is discharged is received, the relay 5 is put in the make state, and the contact of the relay 5 Is bypassed to bypass the current supplied from the secondary side of the current transformer 1, and after a predetermined time has elapsed, the relay 5 is brought into a break state to open the contact of the relay 5 so that the secondary side of the current transformer 1 is opened. When the overvoltage detection circuit 4 detects an overvoltage again when the current supplied from the lamp 2 is supplied to the lamp device 2, the arithmetic processing circuit 9 determines that the lamp device 2 is disconnected, and the lamp device 2 is connected to the external device 7. Tell them that you are broken.
[0011]
As described above, only when the overvoltage is detected by the overvoltage detection circuit 4 and then the relay 5 is made and broken at a predetermined cycle and the overvoltage detection circuit 4 detects the overvoltage twice in succession, Therefore, it is possible to prevent erroneous detection due to transient overvoltage due to noise or the like.
[0012]
(Third embodiment)
As shown in the configuration diagram of FIG. 3, in parallel with the relay of the configuration diagram of FIG. 2, the current supplied from the secondary side of the current transformer 1 is internally bypassed to control the current flowing through the lamp unit 2. In the case where the dimming circuit 13 is connected, when the dimming circuit 13 controls the current flowing through the lamp 2 to an extremely low level, the predetermined period of time does not affect the light emission of the lamp 2 for a predetermined period. When the control circuit 9 instructs the dimming circuit 13 to control the flow of a high level of current, and the lamp 2 is disconnected, the high level of current that has flowed for a period of time that does not affect the light emission of the lamp 2 Since the voltage generated by the open state of the secondary side of the current transformer 1 can be set to a high voltage level at which the arrester 11 of the overvoltage protection circuit 3 can be discharged, the lamp 2 even when the lamp 2 is turned off. Can be detected and transmitted to the external device 7.
[0013]
(Fourth embodiment)
As shown in the block diagram of FIG. 4, a plurality of lamps 2 in the block diagram of FIG. 2 are connected in series, and a film cutout 14 that is short-circuited by applying a high voltage is connected to the outside of the lamp disconnection detecting device. In the configuration in which the plurality of lamps 2 are individually connected in parallel, when any of the plurality of lamps 2 is disconnected, the arithmetic processing circuit 9 changes from the overvoltage detection circuit 4 to the overvoltage protection circuit 3. After receiving information that detects the current that is energized when the arrester 11 is discharged, and determining that one of the lamps 2 is broken, the relay 5 is controlled alternately with make and break at predetermined intervals, When the make-up, the current supplied from the secondary side of the current transformer 1 is bypassed by the contact of the relay 5 to secure the power supply of the lamp breakage detection device, and when the relay 5 is broken, the secondary of the current transformer 1 The high voltage generated by opening the side of the overvoltage protection circuit 3 The voltage of a predetermined level discharged by the star 11 is applied alternately to the film cutout 14 connected to the disconnected lamp 2. The film cutout 14 connected to the lamp 2 disconnected by the make and break operations of the relay 5 is short-circuited to bypass the current, and the secondary side open state of the current transformer 1 is restored to the high level. By performing until the voltage is no longer generated and the overvoltage detection circuit 4 does not detect the overvoltage, it is detected that the disconnection has occurred in any of the plurality of lamps 2 connected to the lamp disconnection detecting device. At the same time, the lighting state can be maintained except for the disconnected lamp.
[0014]
(Fifth embodiment)
As shown in the block diagram of FIG. 4, a plurality of lamps 2 in the block diagram of FIG. 2 are connected in series, and a film cutout 14 that is short-circuited by applying a high voltage is connected to the outside of the lamp disconnection detecting device. In the configuration in which the plurality of lamps 2 are individually connected in parallel, when any of the plurality of lamps 2 is disconnected, the arithmetic processing circuit 9 changes from the overvoltage detection circuit 4 to the overvoltage protection circuit 3. The information which detected the electric current which is supplied when the arrester 11 is discharged is received, and the relay 5 is alternately controlled to make and break at a predetermined cycle, and supplied from the secondary side of the current transformer 1 when the relay 5 is made. The arrester of the overvoltage protection circuit 3 generates a high voltage by bypassing the current at the contact of the relay 5 to secure the power source of the lamp disconnection detecting device and opening the secondary side of the current transformer 1 when the relay 5 is broken. Disconnect the voltage of the predetermined level discharged at 11. Until a predetermined number of times repeatedly alternately applying to the film cutout 14 that is connected to the lamp unit 2 is performed until the overvoltage detection circuit 4 does not detect the overvoltage. If the film cutout 14 connected to the disconnected lamp 2 does not short-circuit even after a predetermined number of times and the overvoltage detection circuit 4 detects an overvoltage, the relay 5 is put in the make state and the lamp is disconnected. The current from the secondary side of the current transformer 1 is bypassed inside the detection device.
[0015]
As described above, when a plurality of lamps 2 are connected in series, one of the plurality of lamps 2 is disconnected, and the film cutout 14 connected to the disconnected lamp 2 is short-circuited. When it does not operate or when it takes a long time to perform a short circuit operation, the open state of the secondary side of the current transformer 1 due to the disconnection of the lamp 2 is restored in a predetermined time, and the primary of the current transformer 1 System reliability can be improved.
[0016]
(Sixth embodiment)
As shown in the block diagram of FIG. 4, a plurality of lamps 2 in the block diagram of FIG. 2 are connected in series, and a film cutout 14 that is short-circuited by applying a high voltage is connected to the outside of the lamp disconnection detecting device. In the configuration in which the plurality of lamps 2 are individually connected in parallel, when any of the plurality of lamps 2 is disconnected, the arithmetic processing circuit 9 changes from the overvoltage detection circuit 4 to the overvoltage protection circuit 3. The information which detected the electric current which is supplied when the arrester 11 is discharged is received, and the relay 5 is alternately controlled to make and break at a predetermined cycle, and supplied from the secondary side of the current transformer 1 when the relay 5 is made. The arrester of the overvoltage protection circuit 3 generates a high voltage by bypassing the current at the contact of the relay 5 to secure the power source of the lamp disconnection detecting device and opening the secondary side of the current transformer 1 when the relay 5 is broken. Disconnect the voltage of the predetermined level discharged at 11. It performed unconditionally until a predetermined number of times repeatedly alternately applying to the film cutout 14 that is connected to the lamp vessel 2. If the overvoltage detection circuit 4 detects an overvoltage because the film cutout 14 connected to the disconnected lamp 2 does not short-circuit even after a predetermined number of times, the relay 5 is set to the make state and the relay 5 contacts To bypass the current from the secondary side of the current transformer 1 inside the lamp disconnection detecting device.
[0017]
As described above, when a plurality of lamps 2 are connected in series, one of the plurality of lamps 2 is disconnected, and the film cutout 14 connected to the disconnected lamp 2 is short-circuited. When it does not operate or when it takes a long time to perform a short circuit operation, the open state of the secondary side of the current transformer 1 due to the disconnection of the lamp 2 is restored in a predetermined time, and the primary of the current transformer 1 System reliability can be improved.
[0018]
(Seventh embodiment)
As shown in the configuration diagram of FIG. 5, the current supplied from the secondary side of the current transformer 1 is controlled in parallel with the relay 5 of the configuration diagram of FIG. In the case where the dimming circuit 13 is connected, when the current flowing through the plurality of lamps 2 is controlled by the dimming circuit 13 to be lower than the current supplied from the secondary side of the current transformer 1, When any one of the plurality of lamps 2 is disconnected, the arithmetic processing circuit 9 receives from the overvoltage detection circuit 4 information that detects the current that flows when the arrester 11 of the overvoltage protection circuit 3 is discharged, and the arithmetic processing circuit 9 The control of the dimming circuit 13 is stopped so that all the current from the secondary side of the current transformer 1 flows to the lamp device 2, and the voltage generated by the open state of the secondary side of the current transformer 1 is The film cutout 14 connected to the lamp 2 that has been disconnected can be easily short-circuited.
[0019]
(Eighth embodiment)
As shown in the configuration diagram of FIG. 5, the current supplied from the secondary side of the current transformer 1 is controlled in parallel with the relay 5 of the configuration diagram of FIG. In the case where the dimming circuit 13 is connected, when the current flowing through the plurality of lamps 2 is controlled by the dimming circuit 13 to be lower than the current supplied from the secondary side of the current transformer 1, When any one of the plurality of lamps 2 is disconnected, the arithmetic processing circuit 9 receives from the overvoltage detection circuit 4 information that detects the current that flows when the arrester 11 of the overvoltage protection circuit 3 is discharged, and the arithmetic processing circuit 9 The control of the dimming circuit 13 is stopped so that all the current from the secondary side of the current transformer 1 flows to the lamp device 2, and the voltage generated by the open state of the secondary side of the current transformer 1 is And make the relay 5 from the arithmetic processing circuit 9 alternately controlling make and break at a predetermined cycle. When the relay 5 is turned off, the current supplied from the secondary side of the current transformer 1 is bypassed by the contact of the relay 5 to secure the power supply of the lamp disconnection detecting device, and when the relay 5 is broken, the current transformer 1 The high voltage generated by opening the secondary side is applied repeatedly to the film cutout 14 connected to the disconnected lamp 2 by applying a predetermined level of voltage discharged by the arrester 11 of the overvoltage protection circuit 3. This is repeated until the overvoltage detection circuit 4 no longer detects overvoltage. If the overvoltage detection circuit 4 detects an overvoltage because the film cutout 14 connected to the disconnected lamp 2 does not short-circuit even after a predetermined number of times, the relay 5 is set to the make state and the relay 5 contacts To bypass the current from the secondary side of the current transformer 1 inside the lamp disconnection detecting device.
[0020]
As described above, even when any of the plurality of lamps 2 is disconnected when the current flowing through the plurality of lamps 2 is controlled by the dimming circuit 13, it is connected to the disconnected lamp. Since the voltage applied to the film cutout 14 can be increased, the short circuit operation of the film cutout 14 can be facilitated.
[0021]
Moreover, when the film cutout 14 connected to the disconnected lamp 2 does not short-circuit or when it takes a long time to short-circuit, the secondary side of the current transformer 1 due to the disconnection of the lamp 2 It is possible to improve the system reliability by suppressing the influence on the primary side of the current transformer 1 by restoring the open state of the current transformer in a predetermined time.
[0022]
(Ninth embodiment)
As shown in the configuration diagram of FIG. 5, the current supplied from the secondary side of the current transformer 1 is controlled in parallel with the relay 5 of the configuration diagram of FIG. In the case where the dimming circuit 13 is connected, when the current flowing through the plurality of lamps 2 is controlled by the dimming circuit 13 to be lower than the current supplied from the secondary side of the current transformer 1, When any one of the plurality of lamps 2 is disconnected, the arithmetic processing circuit 9 receives from the overvoltage detection circuit 4 information that detects the current that flows when the arrester 11 of the overvoltage protection circuit 3 is discharged, and the arithmetic processing circuit 9 The control of the dimming circuit 13 is stopped so that all the current from the secondary side of the current transformer 1 flows to the lamp device 2, and the voltage generated by the open state of the secondary side of the current transformer 1 is And make the relay 5 from the arithmetic processing circuit 9 alternately controlling make and break at a predetermined cycle. When the relay 5 is turned off, the current supplied from the secondary side of the current transformer 1 is bypassed by the contact of the relay 5 to secure the power supply of the lamp disconnection detecting device, and when the relay 5 is broken, the current transformer 1 The high voltage generated by opening the secondary side is applied repeatedly to the film cutout 14 connected to the disconnected lamp 2 by applying a predetermined level of voltage discharged by the arrester 11 of the overvoltage protection circuit 3. Unconditionally up to the number of times. If the overvoltage detection circuit 4 detects an overvoltage because the film cutout 14 connected to the disconnected lamp 2 does not short-circuit even after a predetermined number of times, the relay 5 is set to the make state and the relay 5 contacts To bypass the current from the secondary side of the current transformer 1 inside the lamp disconnection detecting device.
[0023]
As described above, even when any of the plurality of lamps 2 is disconnected when the current flowing through the plurality of lamps 2 is controlled by the dimming circuit 13, it is connected to the disconnected lamp. Since the voltage applied to the film cutout 14 can be increased, the short circuit operation of the film cutout 14 can be facilitated.
[0024]
Moreover, when the film cutout 14 connected to the disconnected lamp 2 does not short-circuit or when it takes a long time to short-circuit, the secondary side of the current transformer 1 due to the disconnection of the lamp 2 It is possible to improve the system reliability by suppressing the influence on the primary side of the current transformer 1 by restoring the open state of the current transformer in a predetermined time.
[0025]
(Tenth embodiment)
As shown in the configuration diagram of FIG. 6, the overvoltage protection circuit 3 of the configuration diagram of FIG. 4 is configured by the switching relay 16 for switching the connection between the arrester 11, the arrester 15, and the arrester, and the lamp unit 2 is not disconnected. Then, the switching relay 16 is in the make state and the contact of the switching relay 16 is in a short circuit state. When any of the plurality of lamps 2 is disconnected and a high voltage is generated due to the open state of the secondary side of the current transformer 1, the high voltage is applied to the arrester 11 of the overvoltage protection circuit 3, and the arrester 11 The discharge is performed at a predetermined voltage level, and the current that is energized due to the discharge is detected by the sensor 12 of the overvoltage detection circuit 4 and transmitted to the arithmetic processing circuit 9. The arithmetic processing circuit 9 sets the relay 5 in the make state, and the current transformer After the current supplied from the secondary side of 1 is supplied to the power supply circuit 10 to secure the power supply of the lamp disconnection detecting device, the switching relay 16 is brought into a break state and the contact of the switching relay 16 is opened to Arrester 15 is connected in series. When arrester 11 and arrester 15 are connected in series, the voltage level at which arrester begins to discharge is the sum of the voltage level at which arrester 11 begins to discharge and the voltage level at which arrester 15 begins to discharge, and is applied to film cutout 14 The voltage to be increased.
[0026]
As described above, by switching the connection configuration between the arrester 11 and the arrester 15 of the overvoltage protection circuit 3, the voltage level at which the overvoltage protection circuit 3 starts discharging is lowered before the disconnection detection, and after the disconnection detection, Since the height can be increased, the disconnection of the lamp 2 can be reliably detected, and the film cutout 14 connected to the disconnected lamp 2 can be short-circuited.
[0027]
(Eleventh embodiment)
As shown in the configuration diagram of FIG. 6, the overvoltage protection circuit 3 of the configuration diagram of FIG. 4 is configured by the switching relay 16 for switching the connection between the arrester 11, the arrester 15, and the arrester, and the lamp unit 2 is not disconnected. Then, the switching relay 16 is in the make state and the contact of the switching relay 16 is in a short circuit state. When any of the plurality of lamps 2 is disconnected and a high voltage is generated due to the open state of the secondary side of the current transformer 1, the high voltage is applied to the arrester 11 of the overvoltage protection circuit 3, and the arrester 11 The discharge is performed at a predetermined voltage level, and the current that is energized due to the discharge is detected by the sensor 12 of the overvoltage detection circuit 4 and transmitted to the arithmetic processing circuit 9. The arithmetic processing circuit 9 sets the relay 5 in the make state, and the current transformer After the current supplied from the secondary side of 1 is supplied to the power supply circuit 10 to secure the power supply of the lamp disconnection detecting device, the switching relay 16 is brought into a break state and the contact of the switching relay 16 is opened to After the arrester 15 is connected in series, the arithmetic processing circuit 9 alternately controls the make and break of the relay 5 at a predetermined cycle, and is supplied from the secondary side of the current transformer 1 when the relay 5 is made. Bypass the current at the relay 5 contact and light When the arrester 11 and the arrester 15 of the overvoltage protection circuit 3 are connected in series, the high voltage generated by securing the power supply of the device breakage detecting device and opening the secondary side of the current transformer 1 when the relay 5 is broken The discharge of a predetermined level of voltage is alternately applied to the film cutout 14 connected to the disconnected lamp 2, and the film cutout 14 connected to the disconnected lamp 2 is short-circuited. Then, the current is bypassed until the open state of the secondary side of the current transformer 1 is restored, no high voltage is generated, and the overvoltage detection circuit 4 does not detect the overvoltage.
[0028]
As described above, by switching the connection configuration between the arrester 11 and the arrester 15 of the overvoltage protection circuit 3, the voltage level at which the overvoltage protection circuit 3 starts discharging is lowered before the disconnection detection, and after the disconnection detection, Since the height can be increased, the disconnection of the lamp 2 can be reliably detected, and the film cutout 14 connected to the disconnected lamp 2 can be short-circuited more reliably.
[0029]
(Twelfth embodiment)
As shown in the configuration diagram of FIG. 6, the overvoltage protection circuit 3 of the configuration diagram of FIG. 4 is configured by the switching relay 16 for switching the connection between the arrester 11, the arrester 15, and the arrester, and the lamp unit 2 is not disconnected. Then, the switching relay 16 is in the make state and the contact of the switching relay 16 is in a short circuit state. When any of the plurality of lamps 2 is disconnected and a high voltage is generated due to the open state of the secondary side of the current transformer 1, the high voltage is applied to the arrester 11 of the overvoltage protection circuit 3, and the arrester 11 The discharge is performed at a predetermined voltage level, and the current that is energized due to the discharge is detected by the sensor 12 of the overvoltage detection circuit 4 and transmitted to the arithmetic processing circuit 9. The arithmetic processing circuit 9 sets the relay 5 in the make state, and the current transformer After the current supplied from the secondary side of 1 is supplied to the power supply circuit 10 to secure the power supply of the lamp disconnection detecting device, the switching relay 16 is brought into a break state and the contact of the switching relay 16 is opened to After the arrester 15 is connected in series, the arithmetic processing circuit 9 alternately controls the make and break of the relay 5 at a predetermined cycle, and is supplied from the secondary side of the current transformer 1 when the relay 5 is made. Bypass the current at the relay 5 contact and light When the arrester 11 and the arrester 15 of the overvoltage protection circuit 3 are connected in series, the high voltage generated by securing the power supply of the device breakage detecting device and opening the secondary side of the current transformer 1 when the relay 5 is broken Applying the discharged voltage of a predetermined level to the film cutout 14 connected to the disconnected lamp device 2 is repeated alternately until a predetermined number of times until the overvoltage detection circuit 4 does not detect the overvoltage. If the overvoltage detection circuit 4 detects an overvoltage because the film cutout 14 connected to the disconnected lamp 2 does not short-circuit even after a predetermined number of times, the relay 5 is set to the make state and the relay 5 contacts To bypass the current from the secondary side of the current transformer 1 inside the lamp disconnection detecting device.
[0030]
As described above, by switching the connection configuration between the arrester 11 and the arrester 15 of the overvoltage protection circuit 3, the voltage level at which the overvoltage protection circuit 3 starts discharging is lowered before the disconnection detection, and after the disconnection detection, Since the height can be increased, the disconnection of the lamp 2 can be reliably detected, and the film cutout 14 connected to the disconnected lamp 2 can be short-circuited more reliably.
[0031]
Moreover, when the film cutout 14 connected to the disconnected lamp 2 does not short-circuit or when it takes a long time to short-circuit, the secondary side of the current transformer 1 due to the disconnection of the lamp 2 It is possible to improve the system reliability by suppressing the influence on the primary side of the current transformer 1 by restoring the open state of the current transformer in a predetermined time.
[0032]
(Thirteenth embodiment)
As shown in the configuration diagram of FIG. 6, the overvoltage protection circuit 3 of the configuration diagram of FIG. 4 is configured by the switching relay 16 for switching the connection between the arrester 11, the arrester 15, and the arrester, and the lamp unit 2 is not disconnected. Then, the switching relay 16 is in the make state and the contact of the switching relay 16 is in a short circuit state. When any of the plurality of lamps 2 is disconnected and a high voltage is generated due to the open state of the secondary side of the current transformer 1, the high voltage is applied to the arrester 11 of the overvoltage protection circuit 3, and the arrester 11 The discharge is performed at a predetermined voltage level, and the current that is energized due to the discharge is detected by the sensor 12 of the overvoltage detection circuit 4 and transmitted to the arithmetic processing circuit 9. The arithmetic processing circuit 9 sets the relay 5 in the make state, and the current transformer After the current supplied from the secondary side of 1 is supplied to the power supply circuit 10 to secure the power supply of the lamp disconnection detecting device, the switching relay 16 is brought into a break state and the contact of the switching relay 16 is opened to After the arrester 15 is connected in series, the arithmetic processing circuit 9 alternately controls the make and break of the relay 5 at a predetermined cycle, and is supplied from the secondary side of the current transformer 1 when the relay 5 is made. Bypass the current at the relay 5 contact and light When the arrester 11 and the arrester 15 of the overvoltage protection circuit 3 are connected in series, the high voltage generated by securing the power supply of the device breakage detecting device and opening the secondary side of the current transformer 1 when the relay 5 is broken Applying the discharged voltage at a predetermined level to the film cutout 14 connected to the disconnected lamp 2 is performed unconditionally up to a predetermined number of times. If the overvoltage detection circuit 4 detects an overvoltage because the film cutout 14 connected to the disconnected lamp 2 does not short-circuit even after a predetermined number of times, the relay 5 is set to the make state and the relay 5 contacts To bypass the current from the secondary side of the current transformer 1 inside the lamp disconnection detecting device.
[0033]
As described above, by switching the connection configuration between the arrester 11 and the arrester 15 of the overvoltage protection circuit 3, the voltage level at which the overvoltage protection circuit 3 starts discharging is lowered before the disconnection detection, and after the disconnection detection, Since the height can be increased, the disconnection of the lamp 2 can be reliably detected, and the film cutout 14 connected to the disconnected lamp 2 can be short-circuited more reliably.
[0034]
Moreover, when the film cutout 14 connected to the disconnected lamp 2 does not short-circuit or when it takes a long time to short-circuit, the secondary side of the current transformer 1 due to the disconnection of the lamp 2 It is possible to improve the system reliability by suppressing the influence on the primary side of the current transformer 1 by restoring the open state of the current transformer in a predetermined time.
[0035]
(Fourteenth embodiment)
As shown in the configuration diagram of FIG. 7, the overvoltage protection circuit 3 of the configuration diagram of FIG. 5 is configured by the switching relay 16 for switching the connection between the arrester 11, the arrester 15, and the arrester, and the lamp unit 2 is not disconnected. Then, the switching relay 16 is in the make state and the contact of the switching relay 16 is in a short circuit state. When the current flowing through the plurality of lamps 2 is controlled by the dimming circuit 13 to be lower than the current supplied from the secondary side of the current transformer 1, one of the plurality of lamps 2 is disconnected. When the centering is performed, the arithmetic processing circuit 9 receives information from the overvoltage detection circuit 4 that the current flowing when the arrester 11 of the overvoltage protection circuit 3 is discharged is received, and the control of the dimming circuit 13 from the arithmetic processing circuit 9 is stopped. Thus, the current generated from the secondary side of the current transformer 1 is increased so that all the current from the secondary side of the current transformer 1 flows to the lamp 2, and the arithmetic processing circuit 9 turns the relay 5 on. In the make state, the current supplied from the secondary side of the current transformer 1 is supplied to the power supply circuit 10 to secure the power supply for the lamp disconnection detecting device, and then the switching relay 16 is set to the break state. After opening the contacts to place arrester 11 and arrester 15 in series, A path 9 controls the relay 5 alternately with make and break at a predetermined cycle, and bypasses the current supplied from the secondary side of the current transformer 1 at the contact of the relay 5 when the relay 5 is made. The high voltage generated by securing the power supply for the disconnection detection device and opening the secondary side of the current transformer 1 when the relay 5 is broken is discharged in the state where the arrester 11 and arrester 15 of the overvoltage protection circuit 3 are connected in series. The application of the predetermined level of voltage to the film cutout 14 connected to the disconnected lamp 2 is repeated alternately until a predetermined number of times until the overvoltage detection circuit 4 detects no overvoltage. If the overvoltage detection circuit 4 detects an overvoltage because the film cutout 14 connected to the disconnected lamp 2 does not short-circuit even after a predetermined number of times, the relay 5 is set to the make state and the relay 5 contacts To bypass the current from the secondary side of the current transformer 1 inside the lamp disconnection detecting device.
[0036]
As described above, even when any of the plurality of lamps 2 is disconnected when the current flowing through the plurality of lamps 2 is controlled by the dimming circuit 13, it is connected to the disconnected lamp. Since the voltage applied to the film cutout 14 can be increased, the short circuit operation of the film cutout 14 can be facilitated.
[0037]
In addition, by switching the connection configuration between the arrester 11 and the arrester 15 of the overvoltage protection circuit 3, the voltage level at which the overvoltage protection circuit 3 starts discharging is lowered before the disconnection is detected, and is increased after the disconnection is detected. Therefore, the disconnection of the lamp 2 can be detected with certainty, and the film cutout 14 connected to the disconnected lamp 2 can be short-circuited more reliably.
[0038]
Furthermore, when the film cutout 14 connected to the disconnected lamp 2 does not short-circuit, or when it takes a long time to short-circuit, the secondary side of the current transformer 1 due to the disconnection of the lamp 2 It is possible to improve the system reliability by suppressing the influence on the primary side of the current transformer 1 by restoring the open state of the current transformer in a predetermined time.
[0039]
(15th embodiment)
As shown in the configuration diagram of FIG. 7, the overvoltage protection circuit 3 of the configuration diagram of FIG. 5 is configured by the switching relay 16 for switching the connection between the arrester 11, the arrester 15, and the arrester, and the lamp unit 2 is not disconnected. Then, the switching relay 16 is in the make state and the contact of the switching relay 16 is in a short circuit state. When the current flowing through the plurality of lamps 2 is controlled by the dimming circuit 13 to be lower than the current supplied from the secondary side of the current transformer 1, one of the plurality of lamps 2 is disconnected. When the centering is performed, the arithmetic processing circuit 9 receives from the overvoltage detection circuit 4 information that detects the current that flows when the arrester 11 of the overvoltage protection circuit 3 is discharged, and stops the control of the dimming circuit 13 from the arithmetic processing circuit 9. The current generated from the secondary side of the current transformer 1 is increased so that all the current from the secondary side of the current transformer 1 flows to the lamp 2, and the arithmetic processing circuit 9 makes the relay 5 In this state, the current supplied from the secondary side of the current transformer 1 is supplied to the power supply circuit 10 to secure the power supply for the lamp disconnection detecting device. Is opened, and arrester 11 and arrester 15 are connected in series. 9 controls the relay 5 alternately with make and break at a predetermined cycle, and when the relay 5 is made, the current supplied from the secondary side of the current transformer 1 is bypassed at the contact of the relay 5 to cut off the lamp. The high voltage generated by securing the power source of the lead detection device and opening the secondary side of the current transformer 1 when the relay 5 is broken is discharged in the state where the arrester 11 and arrester 15 of the overvoltage protection circuit 3 are connected in series. Applying a predetermined level of voltage to the film cutout 14 connected to the disconnected lamp 2 alternately and unconditionally is performed up to a predetermined number of times. If the overvoltage detection circuit 4 detects an overvoltage because the film cutout 14 connected to the disconnected lamp 2 does not short-circuit even after a predetermined number of times, the relay 5 is set to the make state and the relay 5 contacts To bypass the current from the secondary side of the current transformer 1 inside the lamp disconnection detecting device.
[0040]
As described above, even when any of the plurality of lamps 2 is disconnected when the current flowing through the plurality of lamps 2 is controlled by the dimming circuit 13, it is connected to the disconnected lamp. Since the voltage applied to the film cutout 14 can be increased, the short circuit operation of the film cutout 14 can be facilitated.
[0041]
In addition, by switching the connection configuration between the arrester 11 and the arrester 15 of the overvoltage protection circuit 3, the voltage level at which the overvoltage protection circuit 3 starts discharging is lowered before the disconnection is detected, and is increased after the disconnection is detected. Therefore, the disconnection of the lamp 2 can be detected with certainty, and the film cutout 14 connected to the disconnected lamp 2 can be short-circuited more reliably.
[0042]
Furthermore, when the film cutout 14 connected to the disconnected lamp 2 does not short-circuit, or when it takes a long time to short-circuit, the secondary side of the current transformer 1 due to the disconnection of the lamp 2 It is possible to improve the system reliability by suppressing the influence on the primary side of the current transformer 1 by restoring the open state of the current transformer in a predetermined time.
[0043]
【The invention's effect】
According to the above-described embodiment, in the aircraft guidance system that controls the lamps such as the guide lights and control lights installed on the runways and taxiways at the airport, this lamp breakage detection is detected for each lamp. By installing the device, if the lamp breaks, the breakage can be detected immediately and communicated to the external device via the transmission line. The disconnection can be detected without visual confirmation, and the time and labor required to detect the disconnection can be greatly reduced.
[0044]
In addition, since the disconnection of the lamp can be detected immediately, the disconnected lamp can be replaced immediately, and the reliability of the system can be improved.
In addition, after the overvoltage is detected by the overvoltage detection circuit, the relay is made and broken at a predetermined cycle, and it is determined that the lamp is broken only when the overvoltage is detected twice by the overvoltage detection circuit. Therefore, erroneous detection due to transient overvoltage due to noise or the like can be prevented.
[0045]
In addition, a dimming circuit that controls the current flowing to the lamp by internally bypassing the current supplied from the secondary side of the current transformer is connected to the inside of the lamp disconnection detecting device, and the dimming circuit Even when the current flowing through the lamp is controlled, the disconnection can be detected.
[0046]
In addition, when the lighting device is controlled to be turned off by the dimming circuit, even if the lighting device is broken, it is overvoltaged by flowing a high-level current for a period that does not affect the light emission of the lighting device. Since it is possible to generate a voltage level that can be detected by the detection circuit, it is possible to detect that the lamp has been broken and to transmit it to an external device.
[0047]
Even when a plurality of lamps are connected in series, the disconnection of any of the plurality of lamps can be detected.
Also, when multiple lamps are connected in series, if any of the multiple lamps breaks and the film cutout connected to the broken lamp does not short circuit, When it takes a long time to complete, the open state of the secondary side of the current transformer can be restored in a predetermined time, so the influence on the primary side of the current transformer can be suppressed, Reliability can be improved.
[0048]
Further, by switching the connection configuration of the arrester of the overvoltage protection circuit, the lamp breakage can be detected reliably, and the film cutout connected to the broken lamp can be short-circuited more reliably.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a lamp disconnection detecting device according to an embodiment of the present invention.
FIG. 2 is a configuration diagram of a lamp disconnection detecting device according to another embodiment of the present invention.
FIG. 3 is a configuration diagram of a lamp disconnection detecting device according to another embodiment of the present invention.
FIG. 4 is a configuration diagram of a lamp disconnection detecting device according to another embodiment of the present invention.
FIG. 5 is a configuration diagram of a lamp disconnection detecting device according to another embodiment of the present invention.
FIG. 6 is a configuration diagram of a lamp disconnection detecting device according to another embodiment of the present invention.
FIG. 7 is a configuration diagram of a lamp disconnection detecting device according to another embodiment of the present invention.
FIG. 8 is a configuration diagram of a conventional technique.
[Explanation of symbols]
1 ... Current transformer
2 ... Lamp
3. Overvoltage protection circuit
4 ... Overvoltage detection circuit
5 ... Relay
6 ... Transmission path
7 ... External device
8. Transmission control circuit
9: Arithmetic processing circuit
10 ... Power circuit
11 ... Arresta
12 ... sensor
13… Dimming circuit
14 ... Film cutout
15 ... Arresta
16 ... Switching relay

Claims

The current supplied from the secondary side of the current transformer is used as an input, and this current is used as the power supply current inside the device. An overvoltage protection circuit that protects the lamp disconnection detection device from the high voltage that is generated when the secondary side of the current transformer opens due to the core, and an overvoltage of a predetermined level is generated depending on whether or not this overvoltage protection circuit is activated Information is transmitted to an external device connected by a transmission line systematically, an overvoltage detection circuit for detecting whether or not, a relay for bypassing current inside the lamp disconnection detection device in the front stage of the lamp Is composed of a transmission control circuit for controlling the relay, an arithmetic processing circuit for controlling each circuit, and a power supply circuit that secures an internal power supply voltage from the input current, and overvoltage protection is generated when the lamp is disconnected. Suppressed to a predetermined voltage level by the circuit The overvoltage detection circuit detects that the overvoltage protection circuit has been activated, determines that the lamp is broken based on the detection result, maintains the current supply to the power supply circuit by setting the relay to the make state and bypassing the current. In addition, the lamp breakage detection is characterized in that the high voltage generated by opening the secondary side of the current transformer is restored, and the lamp breakage is reported to the external device via the transmission control circuit. apparatus.

In the lamp disconnection detecting device according to claim 1, even if an overvoltage is detected once by the overvoltage detection circuit, it is not determined that the lamp has been disconnected, and the relay is made after the overvoltage detection is detected by the overvoltage detection circuit. The lamp breakage detection is characterized in that when the overvoltage detection circuit detects the overvoltage again, the lamp is broken when the relay is in a break state again after a predetermined time. apparatus.

The lamp disconnection detecting device according to claim 1, further comprising a dimming circuit for controlling an output current to the lamp by bypassing the input current in parallel with the relay, and outputting to the lamp Lamp breakage detection characterized by outputting a predetermined high level of current for a time period that does not affect the light emission of the lamp in a predetermined cycle when the current is extremely low apparatus.

2. The lamp disconnection detecting device according to claim 1, wherein after the overvoltage is detected by the overvoltage detection circuit, the relay is set to the make state, and then the relay is set to the break state again after a predetermined time by the overvoltage detection circuit. A lamp breakage detecting device, which is repeatedly performed until no overvoltage is detected, and after the overvoltage detection circuit stops detecting the overvoltage, the relay is brought into a break state.

5. The lamp disconnection detecting device according to claim 4, wherein after the overvoltage is detected by the overvoltage detection circuit, the relay is set to the make state, and then the relay is set to the break state again after a predetermined time by the overvoltage detection circuit. A lamp disconnection detecting device characterized in that, even if an overvoltage is detected, the relay is stopped on condition that the predetermined number of times has been reached, and the relay is put into a make state.

5. The lamp disconnection detecting device according to claim 4, wherein after the overvoltage is detected by the overvoltage detection circuit, the relay is set to the make state, and then the relay is set to the break state again after a predetermined time by the overvoltage detection circuit. Regardless of whether or not an overvoltage has occurred, it is performed a predetermined number of times, and after the predetermined number of times, the overvoltage detection circuit detects again whether or not an overvoltage has occurred. The lamp breakage detecting device is characterized in that when the overvoltage is not detected, the relay is brought into a break state.

In the lamp disconnection detecting device according to claim 4, 5 or 6, comprising a dimmer circuit for controlling the output current to the lamp by internally controlling the input current in parallel with the relay, A lamp device characterized in that when an overvoltage is detected by an overvoltage detection circuit, the bypass control of the dimming circuit is stopped and all input current is output to the lamp side when an overvoltage is detected. Disconnection detection device.

In the lamp disconnection detecting device according to claim 4, 5, 6 or 7, an overvoltage protection circuit capable of switching the overvoltage control level of the overvoltage protection circuit in multiple stages by control from the arithmetic processing circuit, The overvoltage suppression level is controlled to a low state, and once the overvoltage is detected by the overvoltage detection circuit and the lamp breakage is recognized, the overvoltage suppression level of the overvoltage protection circuit is switched to a high level. Instrument breakage detection device.