JPH0579945A - Receiving device for optical communication - Google Patents
Receiving device for optical communicationInfo
- Publication number
- JPH0579945A JPH0579945A JP3239052A JP23905291A JPH0579945A JP H0579945 A JPH0579945 A JP H0579945A JP 3239052 A JP3239052 A JP 3239052A JP 23905291 A JP23905291 A JP 23905291A JP H0579945 A JPH0579945 A JP H0579945A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- optical
- pulse
- laser light
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Optical Communication System (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、障害探知機能を有する
光通信用受信装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver for optical communication having a fault detection function.
【０００２】[0002]
【従来の技術】光通信用受信装置は、光伝送路から光信
号を受信して電気信号に変換する装置である。従来の光
通信用受信装置は、光伝送路などの障害により、光信号
が受信不能になった場合、および電気回路に障害が発生
したときに警報を出力していた。光伝送路の障害と判定
すると、障害探知機を光伝送路に接続して障害位置を検
出していた。2. Description of the Related Art A receiver for optical communication is a device for receiving an optical signal from an optical transmission line and converting it into an electrical signal. A conventional optical communication receiver outputs an alarm when an optical signal cannot be received due to a failure of an optical transmission line or when a failure occurs in an electric circuit. If it is determined that there is a fault in the optical transmission line, a fault detector is connected to the optical transmission line to detect the fault position.
【０００３】[0003]
【発明が解決しようとする課題】従来の光通信用受信装
置では、光伝送路の障害であると判定した後に、障害探
知機を光伝送路に接続して障害位置を検出しているので
特に重要回線の場合には、修復までの通信中断時間が長
くなるという欠点があった。In the conventional optical communication receiver, the fault detector is connected to the optical transmission line to detect the fault position after it is determined that the optical transmission line is faulty. In the case of an important line, there was a drawback that the communication interruption time until restoration was long.
【０００４】そこで本発明の目的は、光伝送路に障害が
発生すると、障害位置を即時に自動検出する光通信用受
信装置を提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide an optical communication receiver for automatically detecting a fault position immediately when a fault occurs in an optical transmission line.
【０００５】[0005]
【課題を解決するための手段】本発明では、光信号を入
力し、電気信号に変換して出力する受光手段と、この受
光手段からの入力信号を受信情報に変換し、入力信号が
中断すると障害信号を出力する受信信号処理手段と、レ
ーザ光を出力するレーザ光発生手段と、このレーザ光発
生手段より出力されるレーザ光の通過および遮断を制御
するシャッタと、光伝送路から入力される光信号を通過
させて受光手段に出力し、シャッタより入力される前記
レーザ光を光伝送路に出力する選択手段と、受信信号処
理手段から障害信号を受けると、レーザ光発生手段から
光パルスを出力させ、かつシャッタを制御して光パルス
を選択手段に入力する光パルス入力手段と、選択手段よ
り光パルスが光伝送路に入力し、光伝送路の障害箇所か
ら反射され選択手段を通過して受光手段に入力し、受光
手段が出力するパルス信号を受信するパルス受信手段
と、光パルスの出力よりパルス信号受信までの時間差を
測定し、この時間差と光速とにより光伝送路の障害距離
を検出する計測手段とを具備させる。According to the present invention, a light receiving means for inputting an optical signal, converting it into an electric signal and outputting it, and an input signal from this light receiving means are converted into reception information, and when the input signal is interrupted. Received signal processing means for outputting a fault signal, laser light generating means for outputting laser light, a shutter for controlling passage and blocking of laser light output from the laser light generating means, and an input from an optical transmission line When a failure signal is received from the selection means for transmitting the optical signal to the light receiving means and outputting the laser light input from the shutter to the optical transmission line, and the reception signal processing means, an optical pulse is generated from the laser light generation means. The optical pulse input means for outputting and controlling the shutter to input the optical pulse to the selecting means, and the optical pulse is inputted to the optical transmission line from the selecting means and reflected from the obstacle portion of the optical transmission line to select the optical pulse. The pulse receiving means for receiving the pulse signal output from the light receiving means after passing through the light receiving means and the time difference from the output of the optical pulse to the reception of the pulse signal are measured, and the time difference and the speed of light are used to measure the optical transmission line. And a measuring means for detecting the obstacle distance.
【０００６】[0006]
【作用】本発明によれば、本光通信用受信装置は、光伝
送路の障害を検出すると、レーザ光源より、光パルスを
光伝送路に発射し、障害箇所からの反射パルスを受け取
り、両者の時間差から光伝送路の障害位置を検出するこ
とができる。According to the present invention, when the receiver for optical communication detects a fault in the optical transmission line, it emits an optical pulse from the laser light source to the optical transmission line and receives a reflected pulse from the faulty part. The fault position of the optical transmission line can be detected from the time difference of.
【０００７】[0007]
【実施例】次に添付図面を参照して本発明による光通信
用受信装置の実施例を詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an optical communication receiver according to the present invention will now be described in detail with reference to the accompanying drawings.
【０００８】図１は本発明の実施例を示したものであ
る。ハーフミラー１１の入力側には、本装置に光信号を
出力する光ファイバーケーブルの光伝送路１２と、レー
ザ光源１３からの光パルスを出力する電子シャッタ１４
とが配置され、ハーフミラー１１の出力側には受光素子
１５が配置されている。受光素子１５の出力側は増幅回
路１６および受信信号処理回路１７を介して障害探知機
１８の入力側と接続され、障害探知機１８の出力側はレ
ーザ光源１３および電子シャッタ１４と接続されてい
る。FIG. 1 shows an embodiment of the present invention. On the input side of the half mirror 11, an optical transmission line 12 of an optical fiber cable for outputting an optical signal to this device and an electronic shutter 14 for outputting an optical pulse from a laser light source 13 are provided.
Are arranged, and the light receiving element 15 is arranged on the output side of the half mirror 11. The output side of the light receiving element 15 is connected to the input side of the obstacle detector 18 via the amplifier circuit 16 and the reception signal processing circuit 17, and the output side of the obstacle detector 18 is connected to the laser light source 13 and the electronic shutter 14. .
【０００９】光伝送路１２は、光通信用受信装置が置か
れている通信局とその対向局との間の伝送路で、対向局
より送られてくる光信号をハーフミラー１１に出力して
いる。The optical transmission line 12 is a transmission line between a communication station in which a receiver for optical communication is placed and its opposite station, and outputs an optical signal sent from the opposite station to the half mirror 11. There is.
【００１０】電子シャッタ１４は、通常、ハーフミラー
１１からの光がレーザ光源１３に入力しないように両者
間の光通路を遮断している。光伝送路１２の障害が検出
されると、遮断を解除してレーザ光源１３が出力するレ
ーザ光の光パルスをハーフミラー１１に入力する。The electronic shutter 14 normally blocks the optical path between the two so that the light from the half mirror 11 does not enter the laser light source 13. When the failure of the optical transmission line 12 is detected, the interruption is released and the optical pulse of the laser light output from the laser light source 13 is input to the half mirror 11.
【００１１】ハーフミラー１１は、通常、光伝送路１２
から入力される光信号を受光素子１５に出力し、一方、
伝送路障害のときに、電子シャッタ１４が出力する光パ
ルスを光伝送路１２に出力する。受光素子１５はハーフ
ミラー１１からの光信号および光パルスを電気信号およ
びパルス２１に変換して出力する。The half mirror 11 is usually an optical transmission line 12.
The optical signal input from the
The optical pulse output from the electronic shutter 14 is output to the optical transmission line 12 when there is a transmission line failure. The light receiving element 15 converts the optical signal and the optical pulse from the half mirror 11 into an electrical signal and a pulse 21 and outputs the electrical signal and the pulse 21.
【００１２】受信信号処理回路１７は、受光素子１５か
ら所定の電気信号を入力している。電気信号が受信信号
に変化すると受信情報に変換して出力する。入力信号が
中断すると障害警報２２および障害信号２３を出力す
る。増幅回路１６は、受光素子１５からのパルス２１を
増幅して出力する。The reception signal processing circuit 17 inputs a predetermined electric signal from the light receiving element 15. When an electric signal changes into a reception signal, it is converted into reception information and output. When the input signal is interrupted, a fault alarm 22 and a fault signal 23 are output. The amplifier circuit 16 amplifies and outputs the pulse 21 from the light receiving element 15.
【００１３】障害探知機１８は、障害信号２３を入力す
ると、レーザ光源１３を制御し、これより光パルスを出
力させ、かつ電子シャッタ１４を制御して光パルス１９
をハーフミラー１１に入力させる。ハーフミラー１１
は、光パルス１９を光伝送路１２に出力し、光伝送路１
２の障害箇所から戻ってくる反射パルスを受光素子１５
に出力し、受光素子１５が出力するパルス２１を増幅回
路１６より入力する。そして光パルス１９の出力から、
パルス２１の受信までの時間差と、光速とにより光伝送
路の障害位置を検出して出力する。When the fault detector 23 receives the fault signal 23, the fault detector 18 controls the laser light source 13 to output an optical pulse, and also controls the electronic shutter 14 to control the optical pulse 19.
Is input to the half mirror 11. Half mirror 11
Outputs an optical pulse 19 to the optical transmission line 12, and the optical transmission line 1
The light receiving element 15 receives the reflected pulse returning from the failure point 2
The pulse 21 which is output by the light receiving element 15 is input from the amplifier circuit 16. And from the output of the optical pulse 19,
The fault position of the optical transmission line is detected and output based on the time difference until the reception of the pulse 21 and the speed of light.
【００１４】本光通信用受信装置は、以上のように光伝
送路１２の障害を検出すると、レーザ光源１３より、光
パルス１９を光伝送路１２に発射し、障害箇所からの反
射パルスを受け取り、両者の時間差から光伝送路１２の
障害位置を検出する。When the optical communication receiving device detects a fault in the optical transmission line 12 as described above, it emits an optical pulse 19 from the laser light source 13 to the optical transmission line 12 and receives a reflected pulse from the faulty part. The fault position of the optical transmission line 12 is detected from the time difference between the two.
【００１５】[0015]
【発明の効果】このように本発明によれば、光通信用受
信装置に障害探知機能を付加したことにより、光伝送路
に障害が発生すると、障害警報を出力し、障害距離を瞬
時に自動計測するので、障害対策が即時に実行できる利
点があり、特に一刻も早く回復を要する重要回線に対し
て有効である。As described above, according to the present invention, by adding the failure detection function to the optical communication receiver, when a failure occurs in the optical transmission line, a failure alarm is output and the failure distance is automatically detected. Since the measurement is performed, there is an advantage that the failure countermeasure can be executed immediately, and it is particularly effective for an important line that needs recovery as soon as possible.
【図１】本発明の一実施例の光通信用受信装置の概略を
示すブロック図である。FIG. 1 is a block diagram showing an outline of a receiving device for optical communication according to an embodiment of the present invention.
１１ ハーフミラー １２ 光伝送路 １３ レーザ光源 １４ 電子シャッタ １５ 受光素子 １６ 増幅回路 １７ 受信信号処理回路 １８ 障害探知機 11 Half Mirror 12 Optical Transmission Line 13 Laser Light Source 14 Electronic Shutter 15 Light-Receiving Element 16 Amplifying Circuit 17 Received Signal Processing Circuit 18 Fault Detector
Claims (1)
力する受光手段と、 この受光手段からの入力信号を受信情報に変換し、前記
入力信号が中断すると障害信号を出力する受信信号処理
手段と、 レーザ光を出力するレーザ光発生手段と、 このレーザ光発生手段より出力されるレーザ光の通過お
よび遮断を制御するシャッタと、 光伝送路から入力される光信号を通過させて前記受光手
段に出力し、前記シャッタより入力される前記レーザ光
を光伝送路に出力する選択手段と、 前記受信信号処理手段から障害信号を受けると、前記レ
ーザ光発生手段から光パルスを出力させ、かつ前記シャ
ッタを制御して前記光パルスを選択手段に入力する光パ
ルス入力手段と、前記選択手段より光パルスが前記光伝
送路に入力し、光伝送路の障害箇所から反射され、選択
手段を通過して前記受光手段に入力し、受光手段が出力
するパルス信号を受信するパルス受信手段と、光パルス
の出力よりパルス信号受信までの時間差を測定し、この
時間差と光速とにより光伝送路の障害距離を検出する計
測手段とを具備することを特徴とする光通信用受信装
置。1. A light receiving unit for inputting an optical signal, converting the signal into an electric signal and outputting the electric signal, and a receiving signal for converting an input signal from the light receiving unit into reception information and outputting a fault signal when the input signal is interrupted. The processing means, the laser light generating means for outputting the laser light, the shutter for controlling the passage and blocking of the laser light output from the laser light generating means, and the optical signal input from the optical transmission path are passed through the shutter. Selecting means for outputting to the light receiving means and outputting the laser light input from the shutter to the optical transmission path; and receiving a fault signal from the reception signal processing means, causing the laser light generating means to output an optical pulse, Also, the optical pulse inputting means for controlling the shutter to input the optical pulse to the selecting means, and the optical pulse input to the optical transmission line from the selecting means, are reflected from the faulty part of the optical transmission line. The pulse receiving means receives the pulse signal output from the light receiving means after passing through the selecting means and input to the light receiving means, and the time difference from the output of the optical pulse to the reception of the pulse signal is measured. And a measuring means for detecting the obstacle distance of the optical transmission line according to the present invention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3239052A JPH0579945A (en) | 1991-09-19 | 1991-09-19 | Receiving device for optical communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3239052A JPH0579945A (en) | 1991-09-19 | 1991-09-19 | Receiving device for optical communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0579945A true JPH0579945A (en) | 1993-03-30 |
Family
ID=17039160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3239052A Pending JPH0579945A (en) | 1991-09-19 | 1991-09-19 | Receiving device for optical communication |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0579945A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426057A (en) * | 2011-08-27 | 2012-04-25 | 南昌航空大学 | Space multipoint instantaneous light intensity signal acquisition method based on Darlington type phototransistors |
-
1991
- 1991-09-19 JP JP3239052A patent/JPH0579945A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426057A (en) * | 2011-08-27 | 2012-04-25 | 南昌航空大学 | Space multipoint instantaneous light intensity signal acquisition method based on Darlington type phototransistors |
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