JPS59105726A - Gas alarm monitoring system of pcm relay system - Google Patents
Gas alarm monitoring system of pcm relay systemInfo
- Publication number
- JPS59105726A JPS59105726A JP57216440A JP21644082A JPS59105726A JP S59105726 A JPS59105726 A JP S59105726A JP 57216440 A JP57216440 A JP 57216440A JP 21644082 A JP21644082 A JP 21644082A JP S59105726 A JPS59105726 A JP S59105726A
- Authority
- JP
- Japan
- Prior art keywords
- repeater
- gas alarm
- pcm
- alarm
- gas
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/40—Monitoring; Testing of relay systems
- H04B17/401—Monitoring; Testing of relay systems with selective localization
- H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
- H04B17/405—Monitoring; Testing of relay systems with selective localization using different frequencies generated by local multipliers, dividers, modulators
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Dc Digital Transmission (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
Description
【発明の詳細な説明】
（ａ） 発明の技術分野
本発明はＰＣＭ中継方式に使用される線路ケーブルのガ
スアラーム監視方式に関す。DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a gas alarm monitoring system for a line cable used in a PCM relay system.
（ｂ） 従来技術と問題点
第１図は従来例のＰＣＭ中継方式のガスアラーム検出方
式を示す。(b) Prior Art and Problems FIG. 1 shows a conventional PCM relay system gas alarm detection system.
第１図において、ＰＣＭ監視局１より送出されたＰＣＭ
信号は線路ケーブル２−１を介して各中継器３−１．
３−２． ３−３・・・・・・に伝送されている。In FIG. 1, the PCM sent from the PCM monitoring station 1
The signal is transmitted via the line cable 2-1 to each repeater 3-1.
3-2. It is transmitted to 3-3...
ここで線路ケーブル２−１は介在ケーブル２−２と共に
ケーブルコア２に内蔵されている。そしてケーブルコア
２内にはケーブルコア２に浸入防止用のガスが充てんさ
れている。このガスがケーブルコア２の破損によりガス
が漏洩すると例えばガス接触器４−１の接点５−１が閉
じ介在ケーブル２−２を短路する。この短絡は監視局１
にて検出されアラーム６が動作する。これにより監視局
１の保守員が測定器７を用いてループ化された介在ケー
ブル２−２の抵抗を測定する。この抵抗値により線路ケ
ーブル障害地点の中継器を探知する。Here, the line cable 2-1 is built into the cable core 2 together with the intervening cable 2-2. The inside of the cable core 2 is filled with gas for preventing intrusion into the cable core 2. When this gas leaks due to damage to the cable core 2, for example, the contact 5-1 of the gas contactor 4-1 closes to short-circuit the intervening cable 2-2. This short circuit is caused by monitoring station 1
is detected and alarm 6 is activated. As a result, the maintenance staff of the monitoring station 1 uses the measuring device 7 to measure the resistance of the looped intervening cable 2-2. Based on this resistance value, the repeater at the line cable failure point is detected.
しかし 介在ケーブルが温度変動を受けると次上表にお
いて、温度差４０℃に対し、各線径の工
１０％以ｌの時は障害線路ケーブルの標定探策が壬
出来るが中継間隔が１０％以ｌになると椋定探策が出来
ない欠点が生ずる。However, if the intervening cable is subject to temperature fluctuations, as shown in the table above, when the temperature difference is 40°C and the distance of each wire diameter is 10% or more, it is possible to locate the faulty line cable, but if the relay interval is 10% or more. When this happens, the disadvantage arises that it is not possible to conduct a thorough investigation.
（Ｃ１発明の目的
本発明は前記の欠点を解決するために、各中継器にフレ
ーム同期パルスより整形したアドレスを設けた新却、Ｏ
ＰＭＣＰＣＭ中方式アラーム監視方式を提供することを
目的とする。(C1 Object of the Invention) In order to solve the above-mentioned drawbacks, the present invention provides a new and O
The purpose of this invention is to provide a PMCPCM medium alarm monitoring method.
本発明は前記の目的を達成するために、ＰＣＭ中継方式
の線路ケーブルの障害にともなうガスアラーム監視方式
において、該線路ケーブル間に挿入される複数のＰＣＭ
中継器が使用のそれぞれに、フレーム同期パルス検出回
路、各ＰＣＭ中継器毎に分局比が異なる分局器を設け、
前期線路ケーブルの障害にともなうガスアラームの検出
に際し、前期フレーム同期パルスを前記分周回路で分周
した出力をガスアラーム信号として監視局に伝送するこ
とを特徴とする。In order to achieve the above-mentioned object, the present invention provides a system for monitoring gas alarms caused by faults in line cables using a PCM relay system, in which a plurality of PCMs are inserted between the line cables.
A frame synchronization pulse detection circuit is provided for each repeater used, and a branching unit with a different branching ratio is provided for each PCM repeater.
When detecting a gas alarm due to a fault in the first line cable, the first frame synchronization pulse is frequency-divided by the frequency dividing circuit and the output is transmitted to the monitoring station as a gas alarm signal.
ｔｅｌ 発明の実施例
以下本発明を第２図の・実施例に基づいて説明する。第
２図は本発明の実施例を示す図で、図中１′はＰＣＭ監
視局、３’−１，３’−２は中継器、８はフレーム同期
パルス検出回路、９は分局器である。tel Embodiments of the Invention The present invention will be explained below based on the embodiment shown in FIG. FIG. 2 is a diagram showing an embodiment of the present invention, in which 1' is a PCM monitoring station, 3'-1 and 3'-2 are repeaters, 8 is a frame synchronization pulse detection circuit, and 9 is a branching unit. .
第２図において線路ケーブル２−１に伝送されているフ
レーム同期パルスはフレーム同期パルス検出回路８で検
出され、このフレーム同Ｊｔｌｌパルスは次の分周器９
によって、分周される。In FIG. 2, the frame synchronization pulse being transmitted to the line cable 2-1 is detected by the frame synchronization pulse detection circuit 8, and this frame synchronization pulse is transmitted to the next frequency divider 9.
The frequency is divided by
上記の如く分周された中継器３−１のアドレスを示す信
号は、ガスアラーム、信号となって第１図で説明した如
く、線路ケーブルの障害によりガス接触器４−１の接点
５−１が閉じて短絡された介在ケーブル２を経て監視局
１′のアラーム６を動作すると共にアラーム監視用の周
波数カウンタ１０で検出される。これによりθ［定の中
継器３−１におけるガスアラームが検出される１、この
場合の検出は各中継器のアドレスとなっている周波数カ
ウンタで行われているので正確に行われる。The signal indicating the address of the repeater 3-1 whose frequency has been divided as described above becomes a gas alarm signal, and as explained in FIG. 1, the contact 5-1 of the gas contactor 4-1 is When the signal is closed, the alarm 6 of the monitoring station 1' is activated via the short-circuited intervening cable 2, and is detected by the frequency counter 10 for alarm monitoring. As a result, a gas alarm is detected in the repeater 3-1 at θ[1].In this case, the detection is performed accurately by the frequency counter which is the address of each repeater.
（ｆ） 発明の詳細
な説明したクロ＜本発明によれば、ＰＣＭ信号のフレー
ム同期パルスを分周してこれを中継器のアドレスにする
ことＫより監視局において障害地点の探索を正確に行な
うことが出来る。(f) Detailed explanation of the invention According to the present invention, by dividing the frame synchronization pulse of the PCM signal and using it as the address of the repeater, the monitoring station can more accurately search for the fault point. I can do it.
第１図は従来例のＰＣＭ中継方式のガスアラーム監視方
式、第２回は本発明の実施例を示す。
図中１，１′はＰＣＭ監視局、２はケーブルコア２−１
は線路ケーブル、２−２は介在ケーブル、３−１． ３
−２． ３’−１，３’−２・・・・・・は中継器、４
−１．４−２・・・・・・各ガス接触器、５−１，５−
２・・・・・・は各接点、６はアラーム、７は障害標定
点測定用の測定器、８はフレーム同期ノくルス検出回路
、９は分周器、１０は周波数カウンタを示す。FIG. 1 shows a conventional PCM relay system gas alarm monitoring system, and the second part shows an embodiment of the present invention. In the figure, 1 and 1' are PCM monitoring stations, and 2 is cable core 2-1.
is a line cable, 2-2 is an intervening cable, and 3-1. 3
-2. 3'-1, 3'-2... are repeaters, 4
-1.4-2... Each gas contactor, 5-1, 5-
2... each contact, 6 an alarm, 7 a measuring device for fault control point measurement, 8 a frame synchronization pulse detection circuit, 9 a frequency divider, and 10 a frequency counter.
Claims (1)
ラーム監視方式において、該線路ケーブル間に挿入され
る複数のＰＣＭ中継器のそれぞれに、フレーム同期パル
ス検出回路、各ＰＣＭ中継器毎に分周比か異なる分周器
を設け、前記線路ケーブルの障害にともなうガスアラー
ムの検出に際し、前記フレーム同期パルス馨前配分周回
路で分周した出力をガスアラーム信号として監視局に伝
送することを特徴とするＰＣＭ中継方式のガスアラーム
監視方式１．In the gas alarm monitoring system for PCM relay system line cable failures, each of the multiple PCM repeaters inserted between the line cables has a frame synchronization pulse detection circuit, and each PCM repeater has a different frequency division ratio. A PCM relay characterized in that a frequency divider is provided, and when detecting a gas alarm due to a fault in the line cable, the output frequency-divided by the frame synchronous pulse pre-distribution frequency distribution circuit is transmitted as a gas alarm signal to a monitoring station. Gas alarm monitoring method 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57216440A JPS59105726A (en) | 1982-12-10 | 1982-12-10 | Gas alarm monitoring system of pcm relay system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57216440A JPS59105726A (en) | 1982-12-10 | 1982-12-10 | Gas alarm monitoring system of pcm relay system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59105726A true JPS59105726A (en) | 1984-06-19 |
Family
ID=16688569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57216440A Pending JPS59105726A (en) | 1982-12-10 | 1982-12-10 | Gas alarm monitoring system of pcm relay system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59105726A (en) |
-
1982
- 1982-12-10 JP JP57216440A patent/JPS59105726A/en active Pending
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