JP2005047650A

JP2005047650A - Information transmitting system for elevator

Info

Publication number: JP2005047650A
Application number: JP2003204326A
Authority: JP
Inventors: Satoru Ohata; 覚大畠; Koichi Ishii; 浩一石井; Tomoki Maesato; 知樹真榮里
Original assignee: Toshiba Elevator Co Ltd
Current assignee: Toshiba Elevator and Building Systems Corp
Priority date: 2003-07-31
Filing date: 2003-07-31
Publication date: 2005-02-24

Abstract

<P>PROBLEM TO BE SOLVED: To display information for an elevator having high video quality even when transmission distance is varied by movement of an elevator car. <P>SOLUTION: A first transmitter 5a and a first receiver 5b are disposed outside the car, a second receiver 6a and a second transmitter 6b are disposed on the lower part side of a hoistway so that the first transmitter faces the first receiver, analog image information photographed by an in-car monitoring camera 4 is transmitted from the first transmitter by optical transmission in response to the variation of the transmission distance between the transmitter and the receiver following the car movement, a receiving level signal is taken out of the analog video information received by the second receiver, car position information is measured, and the information is fed back to the first transmitter via the second transmitter and the first receiver. The first transmitter controls and transmits the video information at a transmission output strength providing a desired receiving strength based on the car position information. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、エレベータの乗りかごと昇降路下部のピット又は昇降路上部の機械室近傍との間で映像情報などを伝送するエレベータ用情報伝送システムに関する。
【０００２】
【従来の技術】
従来、エレベータ用映像情報を伝送し表示する場合、幾つかのエレベータ用情報伝送システムが提案されている。
【０００３】
その１つは、高層建物内のテナント案内、エレベータかご内防犯その他の目的等から、乗りかご内に映像表示機を設置し、外部からエレベータ乗りかご内に映像情報を伝送して表示し、エレベータ利用者に必要な情報を提供している。
【０００４】
ところで、外部から映像情報を乗りかご内に伝送する場合、乗りかごの移動軸延長上に送信機と受信機とを対向設置し、指向性のある光を利用し、ワイヤレス伝送により映像情報などを送信し、受信機を介して映像表示機に表示するものである。
【０００５】
このような情報伝送手段は、映像情報を光によるワイヤレス伝送により伝送することから、映像情報を伝送するために使用される同軸ケーブルなどを敷設する必要がなく、屋外や屋内の見とおしのできる２点に相対する向きで送信機及び受信機を設置するだけで簡易に映像情報などを伝送できる。
【０００６】
他の１つは、エレベータ乗りかご側にブラケットを介して取り付けた送信機と、当該送信機の軸延長上である昇降路下部（ピット）又は機械室側にブラケットを介して取り付けた受信機とを対峙させるとともに、乗りかご内に監視カメラを取り付け、この監視カメラで撮影された映像情報を送信機から光信号にて受信機に伝送し、この受信された映像情報を乗りかご上部の映像記録装置に記録する構成である（特許文献１参照）。
【０００７】
【特許文献１】
特開２００１−１９３０３号公報（図１参照）。
【０００８】
【発明が解決しようとする課題】
ところで、前者の情報伝送システムでは、エレベータ乗りかご側に送信機又は受信機が設置されているので、乗りかごの移動に伴って映像情報などの伝送距離が変化してしまう問題がある。特に、近年益々建物の高層化が進み、送信機と受信機との伝送距離が長くなる傾向にあることから、送信機と受信機の伝送距離という仕様から考えた場合、少なくとも２ｍから１００ｍ或いは１５０ｍにわたる乗りかごの移動に伴う伝送距離の変化に対応する必要がある。
【０００９】
しかし、実際的には、受信機が２ｍの近距離範囲内において必要以上の光電流が流れないように、送信機の送信出力を制限する方法がとられているので、乗りかごの移動に伴って映像がにじんだり、映像のピントずれが発生したり、さらに伝送距離が長くなるとノイズが発生するなど、受信機の受信感度が悪くなり、乗りかごが最上階の方向に移動するに従い、映像表示機の映像品質が極端に低下する問題がある。
【００１０】
また、後者の情報伝送システム（特許文献１）では、乗りかご内の映像情報を映像記録装置に記録するものであるが、乗りかごの移動に伴って送信機と受信機との伝送距離が大きく変化することから、前者のシステムと同様な問題が生ずる。
【００１１】
さらに、前二者のシステムに共通する点は、適用可能な最大距離が短いことから、建物の高層化に十分に対応できない問題がある。
【００１２】
本発明は上記事情に鑑みてなされたもので、エレベータ乗りかごの移動に伴って伝送距離が変化しても、安定した状態でエレベータ用情報を伝送し、映像品質を保持しつつエレベータ用情報を表示するエレベータ用情報伝送システムを提供することを目的とする。
【００１３】
【課題を解決するための手段】
（１）上記課題を解決するために、本発明は、昇降路内を移動する乗りかごと昇降路下部又は昇降路上部とに対峙するように設置され、エレベータ用情報を光伝送にて送信する第１の送信機及び当該第１の送信機から伝送されてくるエレベータ用情報から受信レベル信号を取り出し、この受信レベル信号からかご位置情報を算出する第１の受信機と、
この第１の受信機に併設され、当該受信機で算出されるかご位置情報をディジタル情報に変換し、光伝送にて送信する第２の送信機及び前記第１の送信機に併設され、前記第２の送信機から伝送されてくるかご位置情報を受信し、前記第１の送信機に渡す第２の受信機とを備え、
前記第１の送信機は、前記第２の受信機から渡されたかご位置情報に基づいて前記エレベータ用情報の送信出力を制御するエレベータ用情報伝送システムである。
【００１４】
この発明は以上のような構成とすることにより、第１の受信機が第１の送信機から伝送されてくるエレベータ用情報の受信レベルを計測し、この受信レベルからかご位置情報を算出し、第２の送信機及び第１の受信機を経由させて第１の送信機にフィードバックするので、第１の受信機では、かご位置情報から送受信機間の伝送距離を推測できるので、この伝送距離に応じてエレベータ用情報の送信出力強度を所要の受信条件となるように制御することが可能となり、ひいては送受信機間の伝送距離が変化しても、第１の受信機によるエレベータ用情報の受信条件を一定に保持可能となり、均一の映像品質をもつエレベータ用情報を表示できる。
【００１５】
なお、第１の受信機で受信されたエレベータ用情報を記録する情報記録装置及び表示機を乗りかご外の例えば監視センタ又は管理室等に設置すれば、例えば乗りかごの移動時にかご内の映像情報を監視センタ又は管理室等で鮮明な画像の状態で見ることができる。
【００１６】
（２）また、本発明は、昇降路内を移動する乗りかごと昇降路下部又は昇降路上部とに対峙するように設置され、エレベータ用情報を光伝送にて送信する第１の送信機及び当該第１の送信機から伝送されてくる第１のエレベータ用情報から受信レベル信号を取り出し、この受信レベル信号からかご位置情報を算出する第１の受信機と、昇降路外部から第２のエレベータ用情報を発生する機器と、前記乗りかご内に設置されるかご内表示機と、前記第１の受信機に併設され、当該受信機から受け取るかご位置情報に基づいて前記機器から受け取る第２のエレベータ用情報の送信出力を制御し光伝送にて送信する第２の送信機及び前記第１の送信機に併設され、前記第２の送信機から伝送されてくる第２のエレベータ用情報を受信し前記かご内表示機に表示する第２の受信機とを設ければ、乗りかごの移動時に第２の送信機から第２の受信機に向けて所要の受信条件となるような送信出力強度で外部から入力される第２のエレベータ用情報を送信し、かご内の表示機に表示することが可能となる。
【００１７】
なお、常時、第２の送信機から所定の送信出力のパイロット信号を第２の受信機に向けて送信する構成とすれば、第２の受信機は、そのパイロット信号の受信レベルからかご位置情報を算出し、第１の送信機に渡すようにすれば、乗りかごの位置情報をより正確に算出でき、よって第１の送信機は、当該かご位置情報に基づいてエレベータ用情報の送信出力強度を制御しつつ送信することが可能である。
【００１８】
逆に、外部から入力されるメッセージを含む映像情報などのエレベータ用情報をかご内表示機に表示する場合、第１の送信機から所定の送信出力強度のパイロット信号を送信し、第１の受信機でパイロット信号の受信レベルからかご位置情報を算出し、第２の送信機に渡すようにすれば、第２の送信機は、外部から入力されるメッセージを含む映像情報などのエレベータ用情報の送信出力強度を制御しながら送信し、乗りかご内の表示機に表示することも可能である。
【００１９】
（３）さらに、本発明は、昇降路内を移動する乗りかごと昇降路下部又は昇降路上部とに対峙するように設置され、第１のエレベータ用情報を光伝送にて送信する第１の送信機及び当該第１の送信機から伝送されてくるエレベータ用情報から受信レベル信号を取り出し、この受信レベル信号からかご移動方向及びかご移動距離を含む第１のかご位置情報を算出する第１の受信機と、昇降路外部から第２のエレベータ用情報を発生する機器と、前記乗りかご内に設置されるかご内表示機と、前記第１の受信機に併設され、前記機器から発生する第２のエレベータ用情報又は所定の送信出力のパイロット信号に前記第１の受信機で算出されたかご位置情報のディジタル化した第１のかご位置情報を重畳し、光伝送にて送信する第２の送信機及び前記第１の送信機に併設され、当該第２の送信機から伝送されてくる第２のエレベータ用情報又は所定の送信出力のパイロット信号を受信し、その受信レベル信号からかご移動方向及びかご移動距離を含む第２のかご位置情報を取り出し、また前記重畳された前記第１のかご位置情報とを取り出す第２の受信機とを設け、かつ、第２の受信機又は第１の送信機は、前記第１及び第２のかご位置情報のかご移動方向を比較し、かご移動方向が一致する場合に当該第１及び第２のかご位置情報に含む移動距離を平均化し、さらに、第１の送信機は、平均化された移動距離のかご位置情報に基づいて第１のエレベータ用情報の送信出力を制御する構成とすれば、第１及び第２のエレベータ用情報をそれぞれ所要の送信出力強度で制御することが可能である。
【００２０】
（４）なお、テーブルにかご位置情報と送信機の送信出力との関係を規定し、当該かご位置情報に基づいてテーブルから送信出力を取り出すとか、或いは予め乗りかごの全移動距離を所定の移動距離範囲ごとに複数の送信出力を定め、かご位置情報のかご移動距離に基づいて何れかの送信出力を選択し、この選択した送信出力のもとに前記送信機を調整することもでき、これにより送信出力の制御を簡素化することができる。
【００２１】
【発明の実施の形態】
以下、本発明の実施の形態について図面を参照して説明する。
【００２２】
（第１の実施の形態）
図１は本発明に係るエレベータ用情報伝送システムの第１の実施の形態を示す構成図である。
【００２３】
この情報伝送システムは、巻上機１に巻き掛けられたメインロープ２に吊下されているエレベータの乗りかご３の防犯が必要な場所、例えばかご天井などに取り付けられ、乗りかご内の状況を撮影する監視カメラ４と、乗りかご３外部に支持部材を介して併設され、監視カメラ４で撮影された映像情報をアナログ映像情報として光伝送する送信機５ａ及び光伝送により送られてくる別の映像情報を受信する受信機５ｂと、これら送信機５ａ及び受信機５ｂに対峙するように昇降路下部のピット付近又は乗りかご外部の昇降路上部付近に併設され、前記送信機５ａから光伝送されてくるアナログ映像情報を受信する受信機６ａ及び前記受信機５ｂに向けてデジタル情報を光伝送にて送信する送信機６ｂとが設けられている。
【００２４】
これら受信機６ａ及び送信機６ｂは、送信機６ａ及び受信機６ｂと互いに対峙する関係に設置されているだけでなく、乗りかご３の移動に伴って送受信方向が変化しない場所、例えば昇降路下部のピット付近の乗りかごガイド用レール、乗りかご外部の昇降路上部付近又は機械室近傍の昇降路上部の乗りかごガイド用レールなどに取り付けられる。
【００２５】
なお、送信機５ａ，６ｂは、例えば可視発光ダイオードや赤外発光ダイオード、半導体レーザーなどの固体発光デバイス、つまり発光素子などが使用され、テレビ・オーディオ関連で使用される遠隔操作器（リモコン）やネットワークのワイヤレスＬＡＮなどで使用される光無線機器としての機能をもっている。つまり、送信機５ａ，６ｂは、発光素子などを含んで所要の送信処理機能が設けられ、一方、受信機５ｂ，６ａは、受光素子などを含んで所要の受信処理機能，つまり送信機６ｂ，５ａから光伝送にて送られてくるアナログ映像情報から受信レベル信号を取り出し、この受信レベル信号から乗りかご３の移動方向及び移動距離を含むかご位置情報を計測する処理機能をもっている。つまり、受信機６ａ，５ｂで受信される受信レベルとしては、送・受信機６ｂ・６ａの設置位置を基準とし、乗りかご３が例えば上昇方向に移動したとすれば、送・受信機５ａ・５ｂが基準位置から徐々に遠ざかるので、受信機６ａ、５ｂでは下降傾斜する受信レベルを受信する。その結果、この受信レベルの下降傾斜からかご移動方向が上昇方向であることが分かり、また下降傾斜角度から速度が分かり、かつ、下降傾斜時間も検出できるので、これら角度と時間からかご移動距離を計測できる。従って、受信レベル信号から乗りかご３のかご移動方向及びかご移動距離を含むかご位置情報を計測できる。なお、このような受信処理機能は、受信機５ｂだけにもたせてもよい。
【００２６】
また、情報伝送システムには、乗りかご外部の昇降路上部付近、昇降路下部のピット付近もしくは基準階付近の管理人室内に設置され、受信機６ａで受信されるメッセージ情報を含む映像情報を記録する映像記録装置７、基準階などのエレベータホール又は監視センタ、監視室などに設置され、映像記録装置７に記録される監視カメラ４で撮影された映像情報を表示するかご外の映像表示機８等が設けられている。９は昇降路下部（ピット）、１０は基準階の乗場ドアである。なお、基準階とはエレベータ利用者が頻繁に乗りかごに乗り降りする階であって、建物の玄関に相当する階であるが、例えば建物の１階に玄関があるにも拘らず、エレベータの乗り降りが２階から始まる場合には２階が基準階となる。
【００２７】
次に、以上のようなシステムの動作について説明する。
【００２８】
今、乗りかご３が２階に着床し、この階で乗車した利用者が最上階を行先階として選択操作したか、又は既に最上階を行先階として登録している場合、エレベータ制御装置は、乗りかご３を最上階に運行するために巻上機１を駆動し、予め定める運行制御のもとに乗りかご３を上昇させる。
【００２９】
このとき、送信機５ａは、監視カメラ４で撮影された乗りかご３内の映像情報を送信するに際し、幾つかの伝送形態がある。
【００３０】
（１）送信機５ａは、監視カメラ４で撮影された乗りかご３内の映像をアナログ映像情報とし、受信機６ａに向けて送信する。この受信機６ａは、受信されたアナログ映像情報の受信レベル信号そのもの、或いは受信レベル信号からかご位置情報を計測し、送信機６ｂに送出する一方、前記アナログ映像情報をそのまま或いはディジタル映像情報に変換し、映像記録装置７に記録する。
【００３１】
送信機６ｂは、受信機６ａから受信レベル信号又はかご位置情報を受け取ると、これら受信レベル信号又はかご位置情報をディジタル情報に変換し、受信機５ｂに向けて光伝送にて送信する。ディジタル情報に変換して送信する理由は、受信機６ａによる映像情報の受信時点のかご位置を表す受信レベル信号又はかご位置情報を送信することにあり、受信後の乗りかご３の移動による影響を受けないようにする為である。
【００３２】
前記受信機５ｂは、送信機６ｂからディジタル的な受信レベル信号又はかご位置情報を受信すると、送信機５ａに渡す。この送信機５ａは、受信レベル信号又はかご位置情報に基づき、受信機６ａが所要の受信条件，つまり受信強度で受信可能になるように、かご上昇に従って送信出力強度を増加する方向に制御する。よって、乗りかご３の移動に伴い、送信機５ａと受信機６ａとの伝送距離が随時変化しても、この受信機６ａで受信されたアナログ映像情報の受信レベル信号又は当該受信レベル信号から取得されるかご位置情報を送信機６ｂ及び受信機５ｂを経由し、送信機５ａにフィードバックすれば、送信機５ａと受信機６ａとの伝送距離が変化しても、受信機６ａは送信機５ａから送信されてくる映像情報を常に所定の受信強度で受信することができる。
【００３３】
（２）また、送信機５ａが監視カメラ４で撮影された乗りかご３内の映像情報を送信するに際し、常時、送信機６ｂから所定の送信出力のパイロット信号を光伝送にて受信機５ｂに向けて送信すれば、受信機５ｂでは、受信されたアナログ的なパイロット信号の受信レベル信号そのもの、或いは受信レベル信号から取得されるかご位置情報を計測し送信機５ａに送ることができる。
【００３４】
よって、送信機５ａは、受け取った受信レベル信号又はかご位置情報に基づいて監視カメラ４で撮影された映像情報の送信出力強度を制御し、受信機６ａに向けて送信することができる。すなわち、送信機５ａは、乗りかご３が上部階に移動した場合、所要の受信条件となるように送信出力強度を増大させ、また乗りかご３が下部階に移動した場合、所要の受信条件となるように送信出力強度を低減する。
【００３５】
従って、この実施の形態によれば、常時所定レベルのアナログ的なパイロット信号を光伝送するので、前述する（１）よりも連続的、かつ、最適な受信条件となるように映像情報を送信でき、しかも映像情報を送信しない場合でもパイロット信号を受信しているので、突発的、或いは予め定める所定の時間のときに映像情報を送信する場合でも、最初の映像情報から最適に条件で送信することができる。
【００３６】
（３）さらに、このシステムにおいては、予め乗りかごの全移動距離が決まっているので、全移動距離例えば１５０ｍを等移動距離（移動距離範囲）２５ｍごとに区分し、これら各移動距離範囲ごとに送信出力強度を定めておけば、かご位置情報から乗りかごがある移動距離範囲内に存在する場合、予め定めた送信出力強度を選択し、送信機５ａの送信出力強度の制御する構成であってもよい。
【００３７】
従って、このような構成においては、乗りかご３の移動に伴い、送信機５ａが受信機５ｂから受け取る連続的に変化する受信レベル信号又はかご位置情報に応じて連続的に送信出力強度を換えて映像情報を送る必要がなくなる。この場合には、受信した映像品質が多少低下するが、送信側の制御を大幅に簡素化できる。
【００３８】
（第２の実施の形態）
図２は本発明に係るエレベータ用情報伝送システムの第２の実施の形態を示す構成図である。なお、同図において、図１に示す部分と同一又は等価な部分には同一符号を付し、その詳しい説明は図１に譲る。
【００３９】
この情報伝送システムは、監視カメラ４、送信機５ａ及び受信機５ｂ、受信機６ａ及び送信機６ｂ、映像記録装置７、映像表示機８が設けられている点は図１と同様である。
【００４０】
このシステムにおいて、特に異なるところは、送信機６ｂにパソコンなどの映像発信機１１を接続し、また乗りかご３内に映像表示機１２を取り付けたことにある。つまり、外部の映像発信機１１から制御指示の他、メッセージ情報を含む映像情報を発生し、送信機６ｂから光伝送にて受信機５ｂに向けて送信し、映像表示機１２に表示し、また制御指示のもとにメッセージ情報を含む映像情報を受信機６ａを介して映像記録装置７に記録する構成である。
【００４１】
このシステムにおいては、外部の映像発信機１１から入力されるメッセージを含む映像情報を送信機６ｂから光伝送にて受信機５ｂに向けて送信すると、受信機５ｂは、受信した外部からのメッセージを含む映像情報を映像表示機１２に表示することが可能であり、また監視カメラ４で撮影された映像情報と外部の映像発信機１１から発生される制御指示を伴うメッセージを含む映像情報とを受信機６ａを経由しそれぞれ領域分けされた映像記録装置７に一旦保存し、所定の映像表示条件のもとにかご外の映像表示機８に表示するものである。
【００４２】
ここでいう所定の映像表示条件とは、例えば時間帯を分けて監視カメラ４の映像情報と外部からのメッセージを含む映像情報をかご外の映像表示機８に表示するとか、常時監視カメラ４の映像情報を映像表示機８に表示するが、外部からのメッセージを含む映像情報が届いた時に優先的に映像表示機８に表示するとか、或いは外部からメッセージを含む映像情報が届いた時に映像表示機８に表示し、一方、所定の操作条件のもとに保存されている監視カメラ４の映像情報を映像表示機８に表示するなど、ユーザの要求に応じた表示する。特に、基準階を含むエレベータホールに映像表示機８が設置されている場合、監視カメラ４の映像情報を直接表示することは好ましくないので、専ら外部の映像発信機１１から入力されるメッセージを含む映像情報を表示し、監視カメラ４の映像情報は別途監視センタ等に設置される映像表示機に表示するなど、使い分けて表示することも可能である。
【００４３】
ところで、このようなシステムにおいても、メッセージを含む映像情報を送信機６ｂから光伝送にて受信機５ｂに向けて送信する際し、乗りかご３の移動に伴って送信機６ｂと受信機５ｂとの伝送距離が変化してしまう。
【００４４】
そこで、前述のごとく送信機５ａから監視カメラ４で撮影されたアナログ映像情報が光伝送にて送信され、受信機６ａにてアナログ映像情報を受信しているので、送信機６ｂは、第１の実施の形態と同様にアナログ映像情報の受信レベル信号又は受信レベル信号から取得されるかご位置情報を受け取って受信機５ｂが最適な受信条件となるように送信出力強度に制御することが可能である。よって、送信機６ｂは、映像発信機１１から受け取るメッセージを含むディジタル映像情報を所要とする送信出力強度で送信するので、乗りかご３の移動に伴って送信機６ｂと受信機５ｂとの伝送距離の変化に対しても、映像のにじみ、ピントずれその他ノイズの影響等を低減し、階部からの映像を映像表示機１２に均一な映像品質で表示することができる。
【００４５】
従って、このような実施の形態によれば、乗りかご３の移動に伴って送信機６ｂと受信機５ｂとの伝送距離が変化したとしても、その伝送距離に応じて送信機６ｂの送信出力強度を制御するので、外部から入力されるメッセージを含むディジタル映像情報を鮮明な映像状態で映像表示機１２に表示できる。
【００４６】
なお、このシステムにおいても、前記第１の実施の形態の（２）で説明したように、予め送信機５ａに所定レベルのパイロット信号を発生する手段を設け、映像発信機１１から入力されるメッセージを含む映像情報を表示するに先立ち、例えば切替制御指示情報を送信し、受信機５ｂを介して送信機５ａに伝送し、当該送信機５ａからパイロット信号を発生するようにすれば、送信機６ｂは、受信機６ａを経由してパイロット信号の受信レベル信号又は受信レベル信号からかご位置情報を受け取ることができ、ひいては最適な送信出力強度でメッセージを含む映像情報を送信できる。
【００４７】
また、前記第１の実施の形態の（３）で説明したように、送信機６ｂ自体にかご全移動距離を複数の等移動距離に区分し、各移動距離範囲ごとに予め送信出力強度を定めておけば、受信機６ａから受け取る受信レベル信号又は受信レベル信号から取得されるかご位置情報のもとに、映像発信機１１から入力されるメッセージを含む映像情報を予め定める所要の送信出力強度出制御して送信することができる。
【００４８】
次に、図３は送信機５ａにて送信出力強度を決定する手順を説明する図である。
【００４９】
前述するように、受信機６ａは、送信機５ａから伝送されてくるアナログ映像情報から受信レベル信号を取り出し、この受信レベル信号からかご移動方向及びかご移動距離を含むかご位置情報を計算し送信機６ｂに渡す。
【００５０】
一方、送信機６ｂは、映像発信機１１からのメッセージを含む映像情報又は一定の送信出力強度のパイロット信号を受信機５ｂに向けて送信することは前述した通りである。
【００５１】
そこで、送信機６ｂとしては、メッセージを含む映像情報又はパイロット信号のアナログ情報に前述する受信機６ａから受け取ったかご位置情報をディジタル的に重畳し、図３に示すような光情報の束２０に変換し伝送すれば、受信機５ｂでは、受光素子５１ｂを介して送信機６ｂから送信される光情報を受信し、電気信号に変換される。そこで、受信機５ｂは、受信データの中のメッセージを含む映像情報又はパイロット信号から受信レベル信号５２ｂを取り出し、この受信レベル信号からかご移動方向及びかご移動距離を含むかご位置情報５３ｂを算出する。また、受信機５ｂは、受光素子５１ｂで受信される受信データの中にかご位置情報５４ｂが重畳されているので、当該かご位置情報５４ｂを抽出する。
【００５２】
ここで、受信機５ｂは、これら２つのかご位置情報５３ｂ、５４ｂに含まれるかご移動方向とかご移動距離（変化量）のうち、移動方向どうしを比較し（５５ｂ）、両かご移動方向が一致した場合、２つのかご移動距離の平均値を算出し（５６ｂ）、送信機５ａに送出する。なお、送信機５ａ自体が移動方向比較処理（５５ｂ）及び平均値算出処理（５６ｂ）を行ってもよい。
【００５３】
送信機５ａは、かご移動平均値に基づいて送信機５ａの送信出力強度を計算し、或いは既にテーブル（図示せず）に規定されるかご移動平均値に対する送信出力強度を算出し（６１ａ）、送信制御回路６２ａに送出する。この送信制御回路６２ａは、送信データである監視カメラ４で撮影された映像情報６３ａを送信するに際し、算出された送信出力強度となるように電流制御回路６４ａを制御し、発光素子６５ａを流れる電流を制御し、受信機６ａに向けて送信する。
【００５４】
なお、前記テーブルには、乗りかごの全移動距離を複数のかご移動距離範囲に区分し、各移動距離範囲ごとに送信出力強度を定めてもよいし、或いはかご移動距離の２乗に連続的に比例するように送信出力強度を制御する構成であってもよい。
【００５５】
また、前記実施の形態では、両移動方向の一致と平均値とから送信機５ａの送信出力強度を制御したが、例えば図３に示すように送信機５ａから映像情報を送信するとき、受信機５ａの受信レベル信号から計算により取得されるかご位置情報を重畳する構成とすれば、受信機６ａに併設される送信機６ｂ側においても図３と同様な手順で送信出力強度を制御することが可能である。
【００５６】
さらに、送信機５ａ，６ｂの送信出力強度を変化させるタイミングとしては、かご位置情報の取得と同時に送信出力強度を制御せずに、ある一定の時間だけ遅延させて制御すれば、唐突な変化を示すかご移動距離（変化量）の影響を排除又は平均化すれば、乗りかごの移動距離を正確、かつ安定に判断でき、精度の高い送信出力強度を得ることができる。
【００５７】
なお、本願発明は、上記実施の形態に限定されるものでなく、その要旨を逸脱しない範囲で種々変形して実施できる。
【００５８】
また、各実施の形態は可能な限り組み合わせて実施することが可能であり、その場合には組み合わせによる効果が得られる。さらに、上記各実施の形態には種々の上位，下位段階の発明が含まれており、開示された複数の構成要素の適宜な組み合わせにより種々の発明が抽出され得るものである。例えば問題点を解決するための手段に記載される全構成要件から幾つかの構成要件が省略されうることで発明が抽出された場合には、その抽出された発明を実施する場合には省略部分が周知慣用技術で適宜補われるものである。
【００５９】
【発明の効果】
以上説明したように本発明によれば、エレベータ乗りかごの移動に伴って伝送距離が変化しても、安定した状態でエレベータ用情報を伝送でき、所要とする映像品質をもつエレベータ用情報を表示できるエレベータ用情報伝送システムを提供できる。
【図面の簡単な説明】
【図１】本発明に係るエレベータ用情報伝送システムの第１の実施の形態を示す構成図。
【図２】本発明に係るエレベータ用情報伝送システムの第２の実施の形態を示す構成図。
【図３】受信機と送信機との機能構成を説明する図。
【符号の説明】
１…巻上機、２…ロープ、３…乗りかご、４…監視カメラ、５ａ，６ｂ…送信機、５ｂ，６ａ…受信機、７…映像記録装置、８…かご外映像表示機、９…昇降路下部、１１…映像発信機、１２…かご内映像表示機。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevator information transmission system that transmits video information and the like between an elevator car and a pit at the lower part of a hoistway or the vicinity of a machine room at the upper part of the hoistway.
[0002]
[Prior art]
Conventionally, when transmitting and displaying elevator video information, several elevator information transmission systems have been proposed.
[0003]
One of them is to install a video display device in the car for the tenant guidance in the high-rise building, crime prevention in the elevator car and other purposes, and to transmit and display video information from the outside to the elevator car. Provides necessary information to users.
[0004]
By the way, when video information is transmitted from the outside to the car, the transmitter and receiver are installed facing each other on the extension of the moving axis of the car, and directional light is used. It is transmitted and displayed on the video display device via the receiver.
[0005]
Such information transmission means transmits video information by wireless transmission using light, so there is no need to lay a coaxial cable or the like used for transmitting video information, and it can be viewed outdoors or indoors. Video information and the like can be transmitted simply by installing a transmitter and a receiver in a direction opposite to the point.
[0006]
The other one is a transmitter attached to the elevator car side via a bracket, and a receiver attached to the lower part of the hoistway (pit) on the axis extension of the transmitter or the machine room side via a bracket. In addition, a surveillance camera is installed in the car, and the video information captured by the surveillance camera is transmitted from the transmitter to the receiver as an optical signal. The received video information is recorded on the upper part of the car. It is the structure recorded on an apparatus (refer patent document 1).
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-19303 (see FIG. 1).
[0008]
[Problems to be solved by the invention]
By the way, in the former information transmission system, since the transmitter or the receiver is installed on the elevator car side, there is a problem that the transmission distance of video information or the like changes with the movement of the car. In particular, since the building has become increasingly taller in recent years and the transmission distance between the transmitter and the receiver tends to be longer, at least 2 m to 100 m or 150 m in view of the specification of the transmission distance between the transmitter and the receiver. It is necessary to cope with the change in the transmission distance accompanying the movement of the car over the range.
[0009]
However, in practice, there is a method of limiting the transmission output of the transmitter so that the receiver does not flow more than necessary in a short distance range of 2 m. As the image is blurred, the image is out of focus, or noise is generated when the transmission distance becomes longer, the receiver's reception sensitivity deteriorates and the image is displayed as the car moves toward the top floor. There is a problem that the video quality of the machine is extremely lowered.
[0010]
In the latter information transmission system (Patent Document 1), video information in a car is recorded in a video recording device, but the transmission distance between the transmitter and the receiver increases as the car moves. Because of the change, the same problem as in the former system arises.
[0011]
In addition, the common point of the former two systems is that the maximum applicable distance is short, so that there is a problem that it cannot sufficiently cope with the increase in the number of buildings.
[0012]
The present invention has been made in view of the above circumstances, and even when the transmission distance changes as the elevator car moves, the elevator information is transmitted in a stable state, and the elevator information is maintained while maintaining the video quality. An object is to provide an elevator information transmission system for display.
[0013]
[Means for Solving the Problems]
(1) In order to solve the above-mentioned problem, the present invention is installed so as to face the carriage moving in the hoistway and the lower hoistway or the upper hoistway, and transmits elevator information by optical transmission. A first receiver that extracts a reception level signal from the first transmitter and elevator information transmitted from the first transmitter, and calculates car position information from the reception level signal;
Along with the first receiver, the car position information calculated by the receiver is converted into digital information, and the second transmitter for transmitting by optical transmission and the first transmitter are provided, A second receiver for receiving car position information transmitted from a second transmitter and passing it to the first transmitter;
The first transmitter is an elevator information transmission system that controls a transmission output of the elevator information based on car position information passed from the second receiver.
[0014]
With this configuration, the first receiver measures the reception level of elevator information transmitted from the first transmitter, calculates car position information from this reception level, Since the feedback to the first transmitter is made via the second transmitter and the first receiver, the transmission distance between the transmitter and the receiver can be estimated from the car position information in the first receiver. Accordingly, it is possible to control the transmission output intensity of the elevator information so as to satisfy a required reception condition. As a result, even if the transmission distance between the transmitter and the receiver changes, the first receiver receives the elevator information. The conditions can be kept constant, and elevator information with uniform video quality can be displayed.
[0015]
If an information recording device and a display for recording the elevator information received by the first receiver are installed in, for example, a monitoring center or a control room outside the car, for example, images in the car when the car is moving Information can be viewed in a clear image state in a monitoring center or a management room.
[0016]
(2) Further, the present invention is a first transmitter that is installed so as to confront the carriage moving in the hoistway and the lower part of the hoistway or the upper part of the hoistway, and transmits information for elevators by optical transmission; A first receiver that extracts a reception level signal from the first elevator information transmitted from the first transmitter and calculates car position information from the reception level signal; and a second elevator from outside the hoistway A device that generates information for use, a car display installed in the car, and a second receiver that is provided in the first receiver and receives from the device based on car position information received from the receiver. The second transmitter for controlling the transmission output of the elevator information and transmitting the information by optical transmission and the second transmitter information received from the second transmitter are provided together with the first transmitter. Inside the basket By providing a second receiver to be displayed on the display, it is input from the outside with a transmission output intensity that satisfies the required reception conditions from the second transmitter to the second receiver when the car is moving The second elevator information can be transmitted and displayed on the display in the car.
[0017]
In addition, if it is set as the structure which always transmits the pilot signal of predetermined transmission output toward a 2nd receiver from a 2nd transmitter, a 2nd receiver will carry out car position information from the reception level of the pilot signal. Is calculated and passed to the first transmitter, so that the position information of the car can be calculated more accurately. Therefore, the first transmitter transmits the transmission output intensity of the elevator information based on the car position information. It is possible to transmit while controlling.
[0018]
Conversely, when elevator information such as video information including a message input from the outside is displayed on the display in the car, a pilot signal having a predetermined transmission output intensity is transmitted from the first transmitter, and the first reception is performed. By calculating the car position information from the reception level of the pilot signal by the machine and passing it to the second transmitter, the second transmitter transmits the elevator information such as video information including a message input from the outside. It is also possible to transmit while controlling the transmission output intensity and display on the display in the car.
[0019]
(3) Further, the present invention is a first vehicle that is installed so as to face the carriage moving in the hoistway and the lower hoistway or the upper hoistway, and transmits the first elevator information by optical transmission. A reception level signal is extracted from the transmitter and the elevator information transmitted from the first transmitter, and first car position information including a car movement direction and a car movement distance is calculated from the reception level signal. A receiver, a device that generates second elevator information from outside the hoistway, a car display installed in the car, and a first device that is attached to the first receiver and is generated from the device. The first car position information obtained by digitizing the car position information calculated by the first receiver is superimposed on the elevator information of 2 or the pilot signal having a predetermined transmission output, and transmitted by optical transmission. Transmitter and front The second elevator information or a pilot signal having a predetermined transmission output, which is attached to the first transmitter and transmitted from the second transmitter, is received, and the car movement direction and the car move from the reception level signal. A second receiver for taking out the second car position information including the distance and taking out the superposed first car position information, and the second receiver or the first transmitter comprises: , Comparing the car moving directions of the first and second car position information, averaging the moving distances included in the first and second car position information when the car moving directions match, and If the transmitter is configured to control the transmission output of the first elevator information based on the average car position information of the travel distance, each of the first and second elevator information has a required transmission output intensity. Can be controlled by That.
[0020]
(4) Note that the relationship between the car position information and the transmission output of the transmitter is defined in the table, and the transmission output is taken out from the table based on the car position information, or the total movement distance of the car is preliminarily moved. It is also possible to define a plurality of transmission outputs for each distance range, select any transmission output based on the car movement distance of the car position information, and adjust the transmitter based on the selected transmission output. As a result, transmission output control can be simplified.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0022]
(First embodiment)
FIG. 1 is a block diagram showing a first embodiment of an elevator information transmission system according to the present invention.
[0023]
This information transmission system is attached to a place where the elevator car 3 suspended from the main rope 2 wound around the hoist 1 needs to be protected, for example, the car ceiling, etc. A monitoring camera 4 to be photographed, a transmitter 5a which is provided outside the car 3 via a support member and optically transmits video information captured by the monitoring camera 4 as analog video information, and another transmitted by optical transmission. A receiver 5b that receives video information and the transmitter 5a and the receiver 5b are arranged near the pit below the hoistway or near the upper hoistway outside the car so as to face the transmitter 5a and the receiver 5b, and are optically transmitted from the transmitter 5a. A receiver 6a that receives incoming analog video information and a transmitter 6b that transmits digital information by optical transmission toward the receiver 5b are provided.
[0024]
The receiver 6a and the transmitter 6b are not only installed in a mutually opposing relationship with the transmitter 6a and the receiver 6b, but also a place where the transmission / reception direction does not change with the movement of the car 3, such as the lower part of the hoistway It is attached to a car guide rail near the pit, a car guide rail near the upper part of the hoistway outside the car or the upper part of the hoistway near the machine room.
[0025]
The transmitters 5a and 6b are, for example, solid light emitting devices such as visible light emitting diodes, infrared light emitting diodes, and semiconductor lasers, that is, light emitting elements. It has a function as an optical wireless device used in a wireless LAN of a network. That is, the transmitters 5a and 6b are provided with a required transmission processing function including a light emitting element and the like, while the receivers 5b and 6a are provided with a required reception processing function including a light receiving element and the like, that is, the transmitter 6b, A reception level signal is extracted from the analog video information transmitted by optical transmission from 5a, and the car position information including the moving direction and moving distance of the car 3 is measured from the received level signal. In other words, the reception levels received by the receivers 6a and 5b are based on the installation positions of the transmitters / receivers 6b and 6a, and if the car 3 moves, for example, in the upward direction, the transmitter / receiver 5a / Since 5b gradually moves away from the reference position, the receivers 6a and 5b receive the reception level that is inclined downward. As a result, it can be seen from the descending slope of this reception level that the car moving direction is the ascending direction, the speed can be seen from the descending tilt angle, and the descending tilt time can also be detected. It can be measured. Therefore, the car position information including the car movement direction and the car movement distance of the car 3 can be measured from the reception level signal. Such a reception processing function may be provided only to the receiver 5b.
[0026]
In the information transmission system, video information including message information received by the receiver 6a is recorded near the upper part of the hoistway outside the car, near the pit below the hoistway or near the reference floor. A video recording device 7 that is installed in an elevator hall such as a reference floor, a monitoring center, a monitoring room, etc., and displays video information taken by the monitoring camera 4 that is recorded in the video recording device 7. Etc. are provided. Reference numeral 9 denotes a lower part of the hoistway (pit), and 10 denotes a landing door on the reference floor. The standard floor is the floor where elevator users frequently get in and out of the car and corresponds to the entrance of the building. For example, even though there is an entrance on the first floor of the building, getting on and off the elevator If is started from the second floor, the second floor becomes the reference floor.
[0027]
Next, the operation of the system as described above will be described.
[0028]
If the car 3 has landed on the second floor and the user who got on this floor has selected and operated the top floor as the destination floor, or has already registered the top floor as the destination floor, the elevator control device In order to operate the car 3 to the top floor, the hoist 1 is driven and the car 3 is raised under predetermined operation control.
[0029]
At this time, the transmitter 5a has several transmission modes when transmitting video information in the car 3 taken by the monitoring camera 4.
[0030]
(1) The transmitter 5a uses the video in the car 3 taken by the surveillance camera 4 as analog video information and transmits it to the receiver 6a. The receiver 6a measures the car position information from the received level signal itself of the received analog video information or the received level signal and sends it to the transmitter 6b, while converting the analog video information as it is or into digital video information. And recorded in the video recording device 7.
[0031]
When the transmitter 6b receives the reception level signal or the car position information from the receiver 6a, the transmitter 6b converts the reception level signal or the car position information into digital information and transmits it to the receiver 5b by optical transmission. The reason why the digital information is converted and transmitted is to transmit a reception level signal indicating the position of the car at the time of reception of the video information by the receiver 6a or the car position information. This is to avoid receiving it.
[0032]
When the receiver 5b receives a digital reception level signal or car position information from the transmitter 6b, it passes it to the transmitter 5a. Based on the reception level signal or car position information, the transmitter 5a controls the transmission output intensity to increase in accordance with the rise of the car so that the receiver 6a can receive the signal under the required reception conditions, that is, the reception intensity. Therefore, even if the transmission distance between the transmitter 5a and the receiver 6a changes as the car 3 moves, it is acquired from the reception level signal of the analog video information received by the receiver 6a or the reception level signal. If the car position information is fed back to the transmitter 5a via the transmitter 6b and the receiver 5b, the receiver 6a is connected to the transmitter 5a even if the transmission distance between the transmitter 5a and the receiver 6a changes. The transmitted video information can always be received at a predetermined reception intensity.
[0033]
(2) When the transmitter 5a transmits video information in the car 3 taken by the surveillance camera 4, a pilot signal having a predetermined transmission output is always transmitted from the transmitter 6b to the receiver 5b by optical transmission. If the signal is transmitted to the receiver 5b, the receiver 5b can measure the received analog pilot signal received level signal itself or the car position information acquired from the received level signal and send it to the transmitter 5a.
[0034]
Therefore, the transmitter 5a can control the transmission output intensity of the video information photographed by the monitoring camera 4 based on the received reception level signal or the car position information, and can transmit it to the receiver 6a. That is, when the car 3 moves to the upper floor, the transmitter 5a increases the transmission output intensity so as to satisfy the required reception condition, and when the car 3 moves to the lower floor, The transmission output intensity is reduced so that
[0035]
Therefore, according to this embodiment, since an analog pilot signal of a predetermined level is always optically transmitted, video information can be transmitted continuously and more optimally than (1) described above. In addition, since the pilot signal is received even when the video information is not transmitted, even if the video information is transmitted suddenly or at a predetermined time, it should be transmitted optimally from the first video information. Can do.
[0036]
(3) Further, in this system, since the total travel distance of the car is determined in advance, the total travel distance, for example, 150 m is divided into equal travel distances (travel distance ranges) of 25 m, and each of these travel distance ranges is classified. If the transmission output intensity is determined, when the car is within a moving distance range from the car position information, a predetermined transmission output intensity is selected and the transmission output intensity of the transmitter 5a is controlled. Also good.
[0037]
Therefore, in such a configuration, as the car 3 moves, the transmission output intensity is continuously changed in accordance with the continuously changing reception level signal or car position information received by the transmitter 5a from the receiver 5b. There is no need to send video information. In this case, although the received video quality is somewhat deteriorated, the control on the transmission side can be greatly simplified.
[0038]
(Second Embodiment)
FIG. 2 is a block diagram showing a second embodiment of the elevator information transmission system according to the present invention. In the figure, the same or equivalent parts as those shown in FIG. 1 are denoted by the same reference numerals, and the detailed description thereof will be given in FIG.
[0039]
This information transmission system is the same as FIG. 1 in that a surveillance camera 4, a transmitter 5a and a receiver 5b, a receiver 6a and a transmitter 6b, a video recording device 7, and a video display 8 are provided.
[0040]
In this system, the difference is that a video transmitter 11 such as a personal computer is connected to the transmitter 6b and a video display 12 is mounted in the car 3. That is, in addition to the control instruction from the external video transmitter 11, video information including message information is generated, transmitted from the transmitter 6b to the receiver 5b by optical transmission, displayed on the video display 12, and The video information including message information is recorded on the video recording device 7 via the receiver 6a under the control instruction.
[0041]
In this system, when video information including a message input from an external video transmitter 11 is transmitted from the transmitter 6b to the receiver 5b by optical transmission, the receiver 5b receives the received external message. It is possible to display the image information including the image information on the image display device 12 and receive the image information captured by the surveillance camera 4 and the image information including a message with a control instruction generated from the external image transmitter 11. The data is temporarily stored in the video recording device 7 divided into regions via the machine 6a, and displayed on the video display machine 8 outside the car under predetermined video display conditions.
[0042]
The predetermined video display conditions here include, for example, displaying video information of the monitoring camera 4 and video information including a message from the outside on the video display device 8 outside the car by dividing time zones, The video information is displayed on the video display 8, but when the video information including a message from the outside arrives, the video information is preferentially displayed on the video display 8 or when the video information including the message is received from the outside. On the other hand, the video information of the monitoring camera 4 stored under a predetermined operation condition is displayed on the video display device 8 or the like according to the user's request. In particular, when the video display 8 is installed in the elevator hall including the reference floor, it is not preferable to display the video information of the monitoring camera 4 directly, so that it includes a message input exclusively from the external video transmitter 11. It is also possible to display video information separately and display the video information of the monitoring camera 4 separately, for example, on a video display installed in a monitoring center or the like.
[0043]
Even in such a system, when video information including a message is transmitted from the transmitter 6b to the receiver 5b by optical transmission, the transmitter 6b and the receiver 5b are moved along with the movement of the car 3. The transmission distance will change.
[0044]
Therefore, as described above, the analog video information captured by the monitoring camera 4 is transmitted from the transmitter 5a by optical transmission and the analog video information is received by the receiver 6a. Similarly to the embodiment, it is possible to receive the car level information acquired from the reception level signal of the analog video information or the reception level signal, and to control the transmission output intensity so that the receiver 5b has the optimum reception condition. . Therefore, since the transmitter 6b transmits the digital video information including the message received from the video transmitter 11 with the required transmission output intensity, the transmission distance between the transmitter 6b and the receiver 5b as the car 3 moves. Even when the image changes, the influence of noise such as blurring, defocusing and other noises can be reduced, and the image from the floor can be displayed on the image display device 12 with uniform image quality.
[0045]
Therefore, according to such an embodiment, even if the transmission distance between the transmitter 6b and the receiver 5b changes as the car 3 moves, the transmission output intensity of the transmitter 6b according to the transmission distance. Therefore, digital video information including a message input from the outside can be displayed on the video display 12 in a clear video state.
[0046]
Also in this system, as described in (2) of the first embodiment, the transmitter 5a is provided with means for generating a pilot signal of a predetermined level in advance, and the message input from the video transmitter 11 is provided. Prior to displaying the video information including the transmission information, for example, the switching control instruction information is transmitted, transmitted to the transmitter 5a via the receiver 5b, and a pilot signal is generated from the transmitter 5a. Can receive the car position information from the reception level signal of the pilot signal or the reception level signal via the receiver 6a, and thus can transmit the video information including the message with the optimum transmission output intensity.
[0047]
Further, as described in (3) of the first embodiment, the transmitter 6b itself divides the total movement distance of the car into a plurality of equal movement distances, and the transmission output intensity is determined in advance for each movement distance range. Then, based on the reception level signal received from the receiver 6a or the car position information acquired from the reception level signal, video information including a message input from the video transmitter 11 is output in a predetermined required transmission output intensity. It can be controlled and transmitted.
[0048]
Next, FIG. 3 is a diagram for explaining the procedure for determining the transmission output intensity in the transmitter 5a.
[0049]
As described above, the receiver 6a extracts the reception level signal from the analog video information transmitted from the transmitter 5a, calculates the car position information including the car movement direction and the car movement distance from the reception level signal, and transmits the transmitter. Pass to 6b.
[0050]
On the other hand, as described above, the transmitter 6b transmits video information including a message from the video transmitter 11 or a pilot signal having a certain transmission output intensity to the receiver 5b.
[0051]
Therefore, the transmitter 6b digitally superimposes the car position information received from the receiver 6a described above on the video information including the message or the analog information of the pilot signal, and forms the optical information bundle 20 as shown in FIG. If converted and transmitted, the receiver 5b receives the optical information transmitted from the transmitter 6b via the light receiving element 51b and converts it into an electrical signal. Therefore, the receiver 5b extracts the reception level signal 52b from the video information including the message in the reception data or the pilot signal, and calculates the car position information 53b including the car movement direction and the car movement distance from the reception level signal. Further, since the car position information 54b is superimposed on the reception data received by the light receiving element 51b, the receiver 5b extracts the car position information 54b.
[0052]
Here, the receiver 5b compares the movement directions of the car movement direction and the car movement distance (change amount) included in the two car position information 53b and 54b (55b), and the two car movement directions coincide with each other. In this case, the average value of the two car moving distances is calculated (56b) and sent to the transmitter 5a. The transmitter 5a itself may perform the moving direction comparison process (55b) and the average value calculation process (56b).
[0053]
The transmitter 5a calculates the transmission output intensity of the transmitter 5a based on the car moving average value, or calculates the transmission output intensity with respect to the car moving average value already defined in the table (not shown) (61a). The data is sent to the transmission control circuit 62a. The transmission control circuit 62a controls the current control circuit 64a so as to obtain the calculated transmission output intensity when transmitting the video information 63a photographed by the monitoring camera 4 as transmission data, and the current flowing through the light emitting element 65a. Is transmitted to the receiver 6a.
[0054]
In the table, the total travel distance of the car may be divided into a plurality of car travel distance ranges, and the transmission output intensity may be determined for each travel distance range, or continuous to the square of the car travel distance. The transmission output intensity may be controlled so as to be proportional to.
[0055]
In the above embodiment, the transmission output intensity of the transmitter 5a is controlled based on the coincidence of both moving directions and the average value. For example, when transmitting video information from the transmitter 5a as shown in FIG. If the car position information obtained by calculation from the reception level signal of 5a is superposed, the transmission output intensity can be controlled in the same procedure as in FIG. 3 also on the transmitter 6b side of the receiver 6a. Is possible.
[0056]
Furthermore, if the transmission output intensity of the transmitters 5a and 6b is changed, the transmission output intensity is not controlled simultaneously with the acquisition of the car position information. If the influence of the car movement distance (change amount) shown is eliminated or averaged, the movement distance of the car can be determined accurately and stably, and a highly accurate transmission output intensity can be obtained.
[0057]
Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.
[0058]
In addition, the embodiments can be implemented in combination as much as possible, and in that case, the effect of the combination can be obtained. Further, each of the above embodiments includes various higher-level and lower-level inventions, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, when an invention is extracted because some constituent elements can be omitted from all the constituent elements described in the means for solving the problem, the omitted part is used when the extracted invention is implemented. Is appropriately supplemented by well-known conventional techniques.
[0059]
【The invention's effect】
As described above, according to the present invention, even when the transmission distance changes as the elevator car moves, the elevator information can be transmitted in a stable state, and the elevator information having the required video quality is displayed. An elevator information transmission system can be provided.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a first embodiment of an elevator information transmission system according to the present invention.
FIG. 2 is a configuration diagram showing a second embodiment of an elevator information transmission system according to the present invention.
FIG. 3 is a diagram illustrating functional configurations of a receiver and a transmitter.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Hoisting machine, 2 ... Rope, 3 ... Car, 4 ... Surveillance camera, 5a, 6b ... Transmitter, 5b, 6a ... Receiver, 7 ... Video recording device, 8 ... Outside car display apparatus, 9 ... Lower part of hoistway, 11 ... Video transmitter, 12 ... In-car video display.

Claims

It is installed so as to confront the carriage and the lower part of the hoistway or the upper part of the hoistway moving in the hoistway, and is transmitted from the first transmitter and the first transmitter for transmitting the elevator information by optical transmission. A first receiver that extracts a reception level signal from the incoming elevator information and calculates car position information from the reception level signal;
Along with the first receiver, the car position information calculated by the receiver is converted into digital information, and the second transmitter for transmitting by optical transmission and the first transmitter are provided, A second receiver for receiving car position information transmitted from a second transmitter and passing it to the first transmitter;
The first transmitter controls the transmission output of the elevator information based on car position information passed from the second receiver, and is an elevator information transmission system.

In the elevator information transmission system according to claim 1,
When the elevator information transmitted from the first transmitter is video information taken by a monitoring camera installed in the car,
An information recording device that is installed at a required location outside the car and records the elevator information received by the first receiver, and a display device that displays the information recorded in the information recording device. An elevator information transmission system characterized by being provided.

A first transmitter that is installed so as to confront a car that moves in the hoistway and a lower part of the hoistway or an upper part of the hoistway, and transmits the first elevator information by optical transmission, and the first transmitter A first receiver that extracts a reception level signal from the elevator information transmitted from the vehicle and calculates car position information from the reception level signal;
A device for generating second elevator information from outside the hoistway;
An in-car display installed in the car;
A second transmitter that is attached to the first receiver and that controls transmission output of second elevator information received from the device based on car position information received from the receiver and transmits the information by optical transmission; and And a second receiver that is attached to the first transmitter, receives the second elevator information transmitted from the second transmitter, and displays the information on the in-car display. Information transmission system for elevators.

A first moving car that moves in the hoistway and facing the lower part of the hoistway or the upper part of the hoistway, and transmitting video information captured by a monitoring camera installed in the car by optical transmission A transmitter and a first receiver for receiving video information transmitted from the first transmitter;
A video recording device installed at a required location outside the car and recording video information received by the first receiver;
Along with the first receiver, the second transmitter for transmitting a pilot signal with a predetermined transmission output by optical transmission and the first transmitter are transmitted from the second transmitter. A second receiver that extracts a reception level signal from the coming pilot signal, calculates car position information from the reception level signal, and passes it to the first transmitter;
The information transmission system for elevators, wherein the first transmitter controls a transmission output of video information photographed by the monitoring camera based on car position information acquired from the pilot signal.

A first transmitter and a first transmitter, which are installed so as to face a carriage and a lower part of the hoistway or an upper part of the hoistway and transmit a pilot signal having a predetermined transmission output by optical transmission. A first receiver that extracts a reception level signal from a pilot signal transmitted from the receiver and calculates car position information from the reception level signal;
A device for generating second elevator information from outside the hoistway;
An in-car display installed in the car;
A second transmitter that is attached to the first receiver and that controls transmission output of second elevator information received from the device based on car position information received from the receiver and transmits the information by optical transmission; and And a second receiver that is attached to the first transmitter, receives the second elevator information transmitted from the second transmitter, and displays the information on the in-car display. Information transmission system for elevators.

A first transmitter that is installed so as to confront a car that moves in the hoistway and a lower part of the hoistway or an upper part of the hoistway, and transmits the first elevator information by optical transmission, and the first transmitter A first receiver that extracts a reception level signal from the elevator information transmitted from the vehicle and calculates first car position information including a car movement direction and a car movement distance from the reception level signal;
A device for generating second elevator information from outside the hoistway;
An in-car display installed in the car;
A first digitized car position information calculated by the first receiver is added to the first receiver and the second elevator information generated from the device or a pilot signal having a predetermined transmission output. A second transmitter for superimposing car position information and transmitting by optical transmission and the second transmitter information or predetermined transmission that is transmitted alongside the first transmitter and transmitted from the second transmitter. Second reception for receiving the output pilot signal, taking out the second car position information including the car moving direction and the car moving distance from the received level signal, and taking out the superimposed first car position information Equipped with a machine,
The second receiver or the first transmitter compares the car moving directions of the first and second car position information, and the first and second car positions are matched when the car moving directions match. Average the travel distance included in the information,
Further, the first transmitter controls the transmission output of the first elevator information based on the average car position information of the travel distance, and the elevator information transmission system.

In the information transmission system for elevators as described in any one of Claims 1 thru | or 6,
An elevator information transmission system, wherein a relationship between the car position information and the transmission output of the transmitter is defined in advance in a table, and the transmission output is extracted from the table based on the car position information.

In the information transmission system for elevators as described in any one of Claims 1 thru | or 7,
A plurality of transmission outputs are determined for each predetermined movement distance range for the total movement distance of the car in advance, and one of the transmission outputs is selected based on the car movement distance of the car position information. An information transmission system for an elevator characterized by adjusting the transmitter.