JPH02202129A - Submarine relay system - Google Patents
Submarine relay systemInfo
- Publication number
- JPH02202129A JPH02202129A JP1021235A JP2123589A JPH02202129A JP H02202129 A JPH02202129 A JP H02202129A JP 1021235 A JP1021235 A JP 1021235A JP 2123589 A JP2123589 A JP 2123589A JP H02202129 A JPH02202129 A JP H02202129A
- Authority
- JP
- Japan
- Prior art keywords
- submarine
- conductor
- submarine cable
- current
- voltage supply
- 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
- 239000004020 conductor Substances 0.000 claims abstract description 29
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 239000013535 sea water Substances 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Insulated Conductors (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は海底中継システムに関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a submarine relay system.
従来、この種の海底中継システムにおいて障害点評定の
手段としては、いわゆるループバック方式が採用されて
いる。Conventionally, a so-called loopback method has been adopted as a means of fault point evaluation in this type of submarine relay system.
第4図は従来の海底中継システムの一例を示すブロック
図である。障害が発生した伝送路をオフラインとし、端
局10から各海底中継器3a3b、〜3e、3f、〜に
割り当あてられた固有のパルスパターンを送出し、この
パターンにより指定された上り海底中継器出力と下り海
底中継器入力を接続する。この結果、上り回線の信号は
下り回線に折り返され再び端局10へ戻ってくる。FIG. 4 is a block diagram showing an example of a conventional submarine relay system. The transmission line in which the failure occurred is taken offline, and a unique pulse pattern assigned to each submarine repeater 3a3b, ~3e, 3f, ~ is sent from the terminal station 10, and the upstream submarine repeater specified by this pattern is Connect the output and downstream submarine repeater input. As a result, the uplink signal is looped back to the downlink and returns to the terminal station 10 again.
端局10では手前の海底中継器3aから順次ループバッ
クを行ない送信信号と受信信号とを比穀して障害区間を
探索する。第4図に示す本例では海底中継器3eから海
底中継器3 jにループバックしたときは正常に送信信
号を受信できるが、海底中継器3fに割り当てたパルス
パターンを送出したときは正常に受信できない。従って
障害区間は海底中継器3f、〜31の区間であると判断
する。The terminal station 10 sequentially loops back from the submarine repeater 3a at the front, compares the transmitted signal and the received signal, and searches for a faulty section. In this example shown in FIG. 4, the transmission signal can be received normally when looped back from submarine repeater 3e to submarine repeater 3j, but it cannot be received normally when the pulse pattern assigned to submarine repeater 3f is sent. Can not. Therefore, it is determined that the faulty section is the section between submarine repeaters 3f and 31.
上述した従来のループバック方式での障害探索では、障
害区間は判断できるが、隣接した海底中継器同士の間の
どこに障害があるのか断定することができなかった。従
って修理の際には、障害区間の海底中継器からケーブル
をたぐり寄せて行き障害点を探していかなければならな
い。ところが最近では中継間隔が長くなり、特に光海底
中継システムではその間隔がn00Kにも及ぼうとして
いるので、障害点の探索作業は極めて能率が悪いという
欠点がある。In the above-mentioned conventional loopback method of fault searching, it is possible to determine the faulty section, but it is not possible to determine where the fault is located between adjacent submarine repeaters. Therefore, when making repairs, it is necessary to drag the cable from the submarine repeater in the faulty section and search for the point of fault. However, recently, the relay interval has become longer, and in particular, in optical submarine relay systems, the interval is about to reach n00K, so there is a drawback that the work of searching for a fault point is extremely inefficient.
本発明の海底中継システムは、海底ケーブルと、この海
底ケーブルの両端に接続した海底中継器とからなり、前
記海底ケーブルは前記両海底中継器間の信号線および給
電線とは別に、長さが前記信号線または給電線の長さの
1/2より段階的に短い第1.第2、〜第nの導体を備
え、前記各海底中継器は最長の前記第1の導体に電圧を
供給する電圧供給回路と、それぞれ同一の抵抗値の抵抗
器を介して前記第2、〜第nの導体の一端と接続された
電流検出回路とを備えることを特徴とする。The submarine relay system of the present invention includes a submarine cable and submarine repeaters connected to both ends of the submarine cable, and the submarine cable has a length that is separate from the signal line and power supply line between the two submarine repeaters. The first line is gradually shorter than 1/2 of the length of the signal line or power supply line. Each submarine repeater is provided with a voltage supply circuit that supplies voltage to the longest first conductor, and a voltage supply circuit that supplies voltage to the longest conductor, and a voltage supply circuit that supplies voltage to the second conductor through a resistor having the same resistance value. It is characterized by comprising a current detection circuit connected to one end of the n-th conductor.
次に、本発明について第1図〜第3図を参照して説明す
る。Next, the present invention will be explained with reference to FIGS. 1 to 3.
第1図は本発明の海底中継システムの一実施例を示すブ
ロック図、第2図、第3図は第1図における海底ケーブ
ルが切断されたときの第1.第2の例を示すブロック図
である。FIG. 1 is a block diagram showing one embodiment of the submarine relay system of the present invention, and FIGS. 2 and 3 show the first embodiment when the submarine cable in FIG. 1 is cut. FIG. 3 is a block diagram showing a second example.
第1図に示すように本実施例は、海底ケーブル1と、そ
の両端に接続した海底中継器3A、3Bとからなり、海
底ケーブル1は信号線および給電線2(長さをLとする
)と、長さLlがL/2より少し短い電圧供給用の導体
51と、長さがり。As shown in FIG. 1, this embodiment consists of a submarine cable 1 and submarine repeaters 3A and 3B connected to both ends of the submarine cable 1. The submarine cable 1 includes a signal line and a power supply line 2 (length is L) and a voltage supply conductor 51 whose length Ll is slightly shorter than L/2.
より段階的に短い導体52.53.54..55゜56
.57.58とを備え、海底中継器3A。Progressively shorter conductors 52.53.54. .. 55°56
.. 57.58, submarine repeater 3A.
3Bはそれぞれ導体51に電圧を供給する電圧供給回路
4と、抵抗器61,62,63,64゜65.66.6
7 (抵抗値はいずれも同じでRとする)を介して各導
体52,53,54,55゜56.57.58と接続さ
れた電流検出回路7とを備え、電圧供給回路4と電流検
出回路7とは接続されている。3B is a voltage supply circuit 4 that supplies voltage to the conductor 51, and resistors 61, 62, 63, 64° 65, 66, 6.
A current detection circuit 7 is connected to each conductor 52, 53, 54, 55゜56, 57, 58 through a conductor 52, 53, 54, 55゜56. It is connected to circuit 7.
続いて、本実施例の動作について第2図、第3図を参照
して説明する。Next, the operation of this embodiment will be explained with reference to FIGS. 2 and 3.
第2図、第3図は第1図における海底ケーブル1が箇所
F1.F2で切断された状態を示している。2 and 3, the submarine cable 1 in FIG. 1 is located at F1. It shows a state where it is cut at F2.
まず、第2図においては、海底ケーブル1の切断箇所F
、の面では導体51は海水を介して導体52および53
と接続され、電圧供給回路4は導体51.海水、導体5
2.53.抵抗361゜62を介して電流検出回路7と
の間にループ回路が形成される。ここで導体51、〜5
3および海水の抵抗値を無視できるように抵抗器61.
62の抵抗値Rを決めると、抵抗器61.62の合成抵
抗値はR/2となり、電流検出回路7は(1)式に示す
電流■1を検出する。First, in Fig. 2, the cut point F of the submarine cable 1 is
, conductor 51 connects conductors 52 and 53 through seawater.
, and the voltage supply circuit 4 is connected to the conductor 51 . seawater, conductor 5
2.53. A loop circuit is formed between the resistor 361 and the current detection circuit 7 via resistors 361 and 62. Here, the conductors 51, ~5
3 and a resistor 61. so that the resistance value of seawater can be ignored.
When the resistance value R of the resistors 61 and 62 is determined, the combined resistance value of the resistors 61 and 62 becomes R/2, and the current detection circuit 7 detects the current 1 shown in equation (1).
I + =V/ (R/2)=2V/R・・・・・・・
・・(1)ここで、■は電圧供給回路4から供給する電
圧である。I + =V/ (R/2)=2V/R・・・・・・
(1) Here, ■ is the voltage supplied from the voltage supply circuit 4.
また、第3図においては、導体51、〜56までは海水
に浸されるので、抵抗器61,62゜63.64.65
の合成抵抗値はR15となる。In addition, in FIG. 3, since the conductors 51 and 56 are immersed in seawater, the resistors 61 and 62°63.64.65
The combined resistance value is R15.
従って電流検出回路7は(2)式に示す電流I2を検出
する。Therefore, the current detection circuit 7 detects the current I2 shown in equation (2).
I2 =V/ (R15)=5V/R・・・・・・・・
・(2)このように本実施例では、流れている電流値を
検出することにより、長い方から何番目の導体までが切
れて海水に浸されているかがわかるので、各導体52、
〜58の長さをあらかじめ決めておけば、どの箇所で海
底ケーブルが切れているかを明確に知ることができる。I2=V/(R15)=5V/R・・・・・・・・・
- (2) In this way, in this embodiment, by detecting the flowing current value, it is possible to know which conductor from the longest one is cut and immersed in seawater, so each conductor 52,
By determining the length of ~58 in advance, it is possible to clearly know where the submarine cable is broken.
〔発明の効果〕
以上説明したように本発明によれば、導体と抵抗器に供
給した電圧と流れた電流によって海底ケーブルの障害点
の位値を明確に判定することができる効果がある。[Effects of the Invention] As explained above, according to the present invention, there is an effect that the position value of the fault point of the submarine cable can be clearly determined based on the voltage supplied to the conductor and the resistor and the current flowing.
第1図は本発明の海底中継システムの一実施例を示すブ
ロック図、第2図、第3図は第1図における海底ケーブ
ルが切断されたときの第1.第2の例を示すブロック図
、第4図は従来の海底中継システムの一例を示すブロッ
ク図である。
1・・・海底ケーブル、2・・・信号線および給電線、
3A、3B・・・海底中継器、4・・・電圧供給回路、
5】、〜58・・・導体、61、〜67・・・抵抗器、
7・・・電流検出回路。FIG. 1 is a block diagram showing one embodiment of the submarine relay system of the present invention, and FIGS. 2 and 3 show the first embodiment when the submarine cable in FIG. 1 is cut. A block diagram showing the second example. FIG. 4 is a block diagram showing an example of a conventional submarine relay system. 1... Submarine cable, 2... Signal line and power supply line,
3A, 3B... submarine repeater, 4... voltage supply circuit,
5], ~58...Conductor, 61, ~67...Resistor,
7... Current detection circuit.
Claims (1)
底中継器とからなり、前記海底ケーブルは前記両海底中
継器間の信号線および給電線とは別に、長さが前記信号
線または給電線の長さの1/2より段階的に短い第1、
第2、〜第nの導体を備え、前記各海底中継器は最長の
前記第1の導体に電圧を供給する電圧供給回路と、それ
ぞれ同一の抵抗値の抵抗器を介して前記第2、〜第nの
導体の一端と接続された電流検出回路とを備えることを
特徴とする海底中継システム。It consists of a submarine cable and a submarine repeater connected to both ends of the submarine cable, and the submarine cable has a length that is equal to the length of the signal line or the feeder line, in addition to the signal line and feeder line between the two submarine repeaters. The first step is shorter than 1/2 of the length,
Each submarine repeater is provided with a voltage supply circuit that supplies voltage to the longest first conductor, and a voltage supply circuit that supplies voltage to the longest conductor, and a voltage supply circuit that supplies voltage to the second conductor through a resistor having the same resistance value. A submarine relay system comprising a current detection circuit connected to one end of an n-th conductor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1021235A JPH02202129A (en) | 1989-01-30 | 1989-01-30 | Submarine relay system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1021235A JPH02202129A (en) | 1989-01-30 | 1989-01-30 | Submarine relay system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02202129A true JPH02202129A (en) | 1990-08-10 |
Family
ID=12049377
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1021235A Pending JPH02202129A (en) | 1989-01-30 | 1989-01-30 | Submarine relay system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02202129A (en) |
-
1989
- 1989-01-30 JP JP1021235A patent/JPH02202129A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2454808C (en) | Built-in test system for aircraft indication switches | |
US5590013A (en) | Electric-supply-switch relay-circuit | |
US4187415A (en) | Remote locating system for transmission faults in data transmission line having regenerative repeaters | |
EP0091267B1 (en) | Telecommunication system loop-back unit | |
US20070103166A1 (en) | Electronic circuit | |
JP3341245B2 (en) | Power supply line switching circuit | |
CN111884865B (en) | Vehicle bus problem point detection equipment and detection method thereof | |
CA1191640A (en) | Test device for locating faults in a two-lead line | |
JPH02202129A (en) | Submarine relay system | |
JPH0474031A (en) | Optical repeater monitor system | |
US3179754A (en) | Electric communication systems | |
CN212811725U (en) | Vehicle bus problem point detection equipment | |
US4595796A (en) | Method of and a circuit arrangement for determining current criteria in the lines of a telephone system | |
CN100448204C (en) | Method for operating a network | |
RU2136106C1 (en) | Method for finding broken piece in remote power supply circuit and device which implements said method | |
JPS59175235A (en) | Fault locating system of repeater | |
JP2806593B2 (en) | Fault detection method for communication lines | |
JPH0738538A (en) | Data transmission method | |
JPS55104163A (en) | Transmission circuit for callout signal | |
JPH07154310A (en) | Feeding system for repeater | |
JPH0437321A (en) | Cable fault point locating system | |
JPS6165546A (en) | Transmission line monitor system | |
JPS59100876A (en) | Trouble-point orienting circuit device connected to device for remotely feeding electric load | |
JPH0327055B2 (en) | ||
JPS5860837A (en) | Search system for fault section |