JPS58220532A - Remote supervising system - Google Patents

Remote supervising system

Info

Publication number
JPS58220532A
JPS58220532A JP57104471A JP10447182A JPS58220532A JP S58220532 A JPS58220532 A JP S58220532A JP 57104471 A JP57104471 A JP 57104471A JP 10447182 A JP10447182 A JP 10447182A JP S58220532 A JPS58220532 A JP S58220532A
Authority
JP
Japan
Prior art keywords
signal
station
slave
polling
master station
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
Application number
JP57104471A
Other languages
Japanese (ja)
Inventor
Atsutake Sayanagi
佐「やなぎ」　「あ」武
Hisashi Tada
多田　壽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP57104471A priority Critical patent/JPS58220532A/en
Publication of JPS58220532A publication Critical patent/JPS58220532A/en
Pending legal-status Critical Current

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
    • H04B17/403—Monitoring; Testing of relay systems with selective localization using different frequencies generated by local oscillators

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To detect a state variation of a supervisory item by a slave station, and thereafter, to make a delay time required until it is transmitted to a master station constant value which does not depend on the number of slave stations, by supervising a state of the supervisory item of the own station, stopping the transmission of a signal consistng of single frequency when a variation is recognized in the stage of the supervisory item, and operating a polling signal transmitting circuit of the master station. CONSTITUTION:A circuit 17 of a master station 1 always receives single frequencies 19, 19', 19''... from slave stations 2, 2', 2''..., but when the single frequency 19 cannot be received, it is stopped to send out a specified control signal 18, instead of which a polling signal transmitting circuit 5 is operated, and a polling signal 3 is sent out to the slave station 2. The slave station 2 receives the polling signal 3, and transmits to the master station 1 a response signal 4 containing a signal for transferring a state of a supervisory item of the own station. During this time, the slave stations 2', 2''... stop temporarily sending out 19', 19''.... When said polling response signal 4 is received, a polling response receiving circuit 11 of the master station 1 sends out the specified control signal 18 again, and each slave station makes preparations to send out 19, 19', 19''....

Description

【発明の詳細な説明】 本発明は、１つの親局と複数の子局があシ、親局が複数
の子局をポーリング方式によって監視する遠隔監視方式
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remote monitoring system in which there is one master station and a plurality of slave stations, and the master station monitors the plurality of slave stations by a polling method.

従来技術のポーリング方式による遠隔監視方式を第１図
〜第３図を使用して説明する。A conventional remote monitoring system using a polling system will be explained using FIGS. 1 to 3.

第１図はポーリング方式による遠隔監視方式の説明図で
あり、１は親局、２．２’、２”・・・は複数の子局で
ある。FIG. 1 is an explanatory diagram of a remote monitoring system using a polling system, where 1 is a master station and 2, 2', 2'', . . . are a plurality of slave stations.

親局１は、子局２，２’、２“　・・・を３，３’、３
“・・・とｊ獣にポーリングし、ポーリングされた子局
２．２’、２“・・・はその都度４，４’、４“・・・
と応答し、この時、同時に自局内の監視項目の状態を親
局に転送する。The master station 1 connects the slave stations 2, 2', 2"... to 3, 3', 3
``...'' polls the j beast, and the polled slave stations 2, 2', 2''... are 4, 4', 4''... each time.
At this time, the status of the monitoring items within the own station is also transferred to the master station.

この間の様子をタイムチャートで表わしたものが第２図
であ夛、その繰返し周期はＴ、＝（ｔ、　＋’ｔ）Ｘｎ
となシ、ある子局で監視項目に状態変化が発生し、その
情報が親局に伝えられるまでの遅延時間の平均値は である。（ｎは子局の数） こくで子局の数ｎが大きい時、特に高速に信号伝送でき
る。監視制御線が得られない場合は、上記の遅延時間が
非常に大きなものとなる欠点を有している。Figure 2 shows a time chart of the situation during this time, and its repetition period is T, = (t, +'t)Xn
The average value of the delay time from when a state change occurs in a monitoring item at a certain slave station until that information is transmitted to the master station is. (n is the number of slave stations) When the number of slave stations n is large, particularly high-speed signal transmission is possible. If a supervisory control line is not available, there is a drawback that the delay time described above becomes very large.

なお、第３図は、従来技術のポーリング方式による遠隔
監視、方式を実現する回路構成例であり、５は親局１の
ポーリング信号送信回路で、そのボー＋７ング信号は親
局１から子局２，２’、２“・・・に向う監視制御線６
に送出される。７は子局２における前記ポーリング信号
の受信回路で、自局がポーリングされたことを検出した
場合、ポーリング応答信号送信回路８を働かせて、自局
の監視項目９．９’、９“・・・の状態とともに、ポー
リング応答信号を子局２．２’、　２“・・・から親局
１に向かう監視制御線１０に送出する。１１は親局１の
ポーリング応答信号の受信回路で子局礼２′、２“・・
・から送られるポーリング応答信号門受信し、同時に送
られる子局の監視項目の状態を知ることができる。FIG. 3 shows an example of a circuit configuration for realizing the remote monitoring method using the conventional polling method. 5 is a polling signal transmission circuit of the master station 1, and the baud+7 signal is sent from the master station 1 to the slave station. Monitoring control line 6 toward 2, 2', 2"...
will be sent to. 7 is a receiving circuit for the polling signal in the slave station 2, and when it detects that its own station has been polled, it activates the polling response signal transmitting circuit 8 to check the monitoring items 9.9', 9'', etc. of the own station. In addition to the status of ., a polling response signal is sent from the slave stations 2, 2', 2'', . . . to the supervisory control line 10 toward the master station 1. 11 is a receiving circuit for the polling response signal of the master station 1, and the slave stations 2', 2''...
・You can receive the polling response signal sent from the terminal and know the status of the monitoring items of the slave station sent at the same time.

本発明は、従来のポーリング方式による遠隔監る手段を
備え、子局には、前記特定の制御信号を受信した時、ポ
ーリング応答信号を送出する監視制御線を使い、同じ伝
送帯域内に配置され、各子局に割当てられた単一周波数
からなる信号を送信する手段、および、自局の監視項目
の状態を監視し、監視項目の状態に変化を認めた時に、
前記単一周波数からなる信号の送信を停止させる手段、
さらに、親局に前記の単一周波数からなる（ｉ号を検出
する手段とを備えることにょシ、前記従来方式の欠点を
解決するものである。The present invention is equipped with remote monitoring means using a conventional polling method, and the slave stations are arranged within the same transmission band using a monitoring control line that sends out a polling response signal when receiving the specific control signal. , a means for transmitting a signal consisting of a single frequency assigned to each slave station, and means for monitoring the status of the monitoring item of the own station, and when a change in the status of the monitoring item is recognized,
means for stopping the transmission of the signal consisting of the single frequency;
Furthermore, the drawbacks of the conventional system can be solved by providing the master station with means for detecting the single frequency (i).

第４図は、本発明による災施例であり、１２は親局１に
おいて、ポーリング信号送信回路５にかわって、特定の
制御信号を送信する回路、１３は子局２において、前記
特定の制御信号を受信する回路、１４は前記特定の制御
信号を受イハした場合、早−周波数を送信する回路、１
５は常時、自局内の監視項目９．　ｇ＋　、　’９／／
・・・を監視し、その状態の変化を検出する回路で、状
態の変化を検出した時は、阻止回路１６を働かせて、前
記単一周波数送信回路１°４の出力を停止させる。１７
は親局において、子局２，２’、２“・・・から送られ
てくる単一周波数を検出する回路である。FIG. 4 shows an example of a disaster according to the present invention, in which 12 is a circuit in the master station 1 that transmits a specific control signal instead of the polling signal transmission circuit 5, and 13 is a circuit in the slave station 2 that transmits the specific control signal. A circuit for receiving a signal; 14 is a circuit for transmitting an early frequency when the specific control signal is received;
5 always monitors items within the own station 9. g+, '9//
When a change in state is detected, the blocking circuit 16 is activated to stop the output of the single frequency transmitting circuit 1°4. 17
is a circuit in the master station that detects a single frequency sent from the slave stations 2, 2', 2'', . . .

ここで、監視制御線がたとえは０．３〜３．４ｋＨｚの
電話１チヤンネル相当の伝送帯域を有している場合、ポ
ーリング信号送信回路５、ポーリング応答信号送信回路
８、特定の制御信号送信回路１２は１２００ｂ／８ＦＳ
Ｋ変調器を、またポーリング信号受信回路７、ポーリン
グ応答信号受信回路１１は１２００ｂ／ｓ　Ｆ８に復調
器を含む回路を想定することができ、単−周阪数送信回
路１４、単−周波数受信回路１７は前記と同一の伝送帯
域内に適当な周波数間隔で並べられ、各子局に割当てら
れたものの送信回路及び受信回路である。Here, if the supervisory control line has a transmission band of 0.3 to 3.4 kHz equivalent to one telephone channel, the polling signal transmitting circuit 5, the polling response signal transmitting circuit 8, and the specific control signal transmitting circuit 12 is 1200b/8FS
K modulator, polling signal receiving circuit 7, polling response signal receiving circuit 11 can be assumed to be a circuit including a demodulator at 1200 b/s F8, single frequency frequency transmitting circuit 14, single frequency receiving circuit Reference numeral 17 denotes a transmitting circuit and a receiving circuit arranged at appropriate frequency intervals within the same transmission band as described above and assigned to each slave station.

第４図の構成の回路動作をタイムチャートで表わすと、
第５図のようになる。通常、親局１は特定の制御信号送
信回路１２の働きで、全子局に向けて、特定の制御信号
１８を繰返し送出している。The circuit operation of the configuration shown in Figure 4 is expressed as a time chart.
It will look like Figure 5. Normally, the master station 1 repeatedly sends a specific control signal 18 to all slave stations by means of a specific control signal transmitting circuit 12 .

子局２，２’、２“・・・はこの特定の制御信号を受信
し、単一周波数送信回路１４を働かせて、単一周波数か
らなる信号１９．１９’、　１９″・・・を送出してい
る。The slave stations 2, 2', 2"... receive this specific control signal, activate the single frequency transmitting circuit 14, and send out signals 19, 19', 19"... consisting of a single frequency. are doing.

子局２では監視項目９．９’　、　９”・・・の状態を
常時監視しているが、その状態の変化を検出した時、阻
止回路１６を働かせて、単一周波数１９の送出を停止さ
せる。The slave station 2 constantly monitors the status of the monitoring items 9.9', 9'', etc., and when a change in the status is detected, the blocking circuit 16 is activated to stop sending out the single frequency 19. let

親局１の回路１７は子局２，２’、２“・・・から常時
単一周波数１９．１９’、　１９”・・・を受信してい
るが、単一周波数１９が受信できなくなった時、特定の
制御信号１８の送出をやめ、かわってポーリング信号送
信回路５を働かせて、子局２に対し、ポーリング信号３
を送出する。子局２はポーリング信号３を受信し、自局
の監視項目の状態を転送する信号を含む応答信号４を親
局１に向は送信する。The circuit 17 of the master station 1 is always receiving single frequencies 19.19', 19'', etc. from the slave stations 2, 2', 2'', etc., but the single frequency 19 can no longer be received. At this time, the transmission of the specific control signal 18 is stopped and the polling signal transmitting circuit 5 is operated instead to transmit the polling signal 3 to the slave station 2.
Send out. The slave station 2 receives the polling signal 3 and transmits to the master station 1 a response signal 4 containing a signal for transferring the status of the monitoring item of the slave station.

この間、子局２′、２“・・・は１９’、　１９“・・
・の送出を一時停止している。During this time, slave stations 2', 2"... are 19', 19"...
・Sending is temporarily stopped.

親局１のポーリング応答受信回路１１は、前記ポーリン
グ応答信号４を受けると再び特定の制御信号１８を送出
し、各子局は１９．１９’、　１９“・・・を送出する
態勢とする。When the polling response receiving circuit 11 of the master station 1 receives the polling response signal 4, it again sends out a specific control signal 18, and each slave station prepares to send out signals 19, 19', 19'', and so on.

本発明によれば、ある子局で監視項目の状態変化を検出
し、親局に転送されるまでの遅延時間は、Ｔ、＝ｔ、＋
ｔ、＋α であシ、特定の制御信号１８とポーリング信号３の信号
長が同じである場合、前記遅延時間の平均は、 Ｔｔ（平均値）＝１．５ｔ、＋ｔ。According to the present invention, the delay time from when a change in the status of a monitoring item is detected at a certain slave station until it is transferred to the master station is T, = t, +
t, +α If the signal lengths of the specific control signal 18 and the polling signal 3 are the same, the average of the delay times is: Tt (average value) = 1.5t, +t.

となシ、これは子局の数ｎによらない一定値となる。However, this is a constant value that does not depend on the number n of slave stations.

以上、説明したように、本発明によれば子局で監視項目
の状態変化を検出した彼、親局に伝えられるまでの遅延
時間は子局の数によらない一定値となシ、子局の数が多
く、特に高速の監視制御線が得られない場合でも、高速
の監視項目転送ができる効果がある。As explained above, according to the present invention, when a change in the status of a monitored item is detected by a slave station, the delay time until it is reported to the master station is a constant value regardless of the number of slave stations. This has the effect of allowing high-speed monitoring item transfer even when there are a large number of monitoring control lines and particularly high-speed monitoring control lines cannot be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来技術のボ→・９リング方式による遠隔監視
方式の説明図、第２図は従来技術のポーリング方式によ
る遠隔監視方式のタイムチャート、第３図は従来技術の
ポーリング方式による遠隔監視方式の回路構成例、第４
図は本発明による遠隔監視方式の回路構成例、第５図は
本発明による遠隔監視方式のタイムチャートである。 １・・・・・・親局、２．２’　、　２″・・・・・・
子局、３．３’　、　３″・・・・・・ポーリング信号
、４．４’、４“・・・・・・ポーリング応答信号、５
・・・・・・ボーリング信号送信回路、６・・・・・・
親局から子局に向う監視制御線、７・・・・・・ポーリ
ング信号受信回路、８・・・・・・ポーリング応答信号
送信回路、９．９’　、　９″・・・・・・監視項目、
１０・・・・・・子局から親局に向う監視制御線、１１
・・・・・・ポーリング応答信号受信回路、１２・・・
・・・特定の制御信号送信回路、１３・・・・・・特定
の制御信号受信回路、１４・・・・・・単一周波数から
なる信号の送信回路、１５・・・・・・監視項目の状態
変化検出回路、１６・・・・・・阻止回路、１７・・・
・・・単一周波数受信回路、１８・・・・・・特定の制
御信号、１９．１９’、　１９“・・・・・・単一周波
数からなる信号。 、（ 市 １ Ｌ−一一一一　　　　　　　　　ＪFigure 1 is an explanatory diagram of the remote monitoring system using the conventional boring method, Figure 2 is a time chart of the remote monitoring system using the conventional polling method, and Figure 3 is the remote monitoring method using the conventional polling method. Example of circuit configuration of the method, 4th
The figure shows an example of a circuit configuration of a remote monitoring system according to the present invention, and FIG. 5 is a time chart of the remote monitoring system according to the present invention. 1... Master station, 2.2', 2''...
Slave station, 3.3', 3"...Polling signal, 4.4', 4"...Polling response signal, 5
...Boring signal transmission circuit, 6...
Monitoring control line from master station to slave station, 7...Polling signal receiving circuit, 8...Polling response signal transmitting circuit, 9.9', 9''...Monitoring item,
10...Monitoring control line from slave station to master station, 11
...Polling response signal receiving circuit, 12...
... Specific control signal transmitting circuit, 13 ... Specific control signal receiving circuit, 14 ... Signal transmitting circuit consisting of a single frequency, 15 ... Monitoring item state change detection circuit, 16... blocking circuit, 17...
...Single frequency receiving circuit, 18...Specific control signal, 19.19', 19"...Signal consisting of a single frequency. , (City 1 L-111 One J

Claims (1)

【特許請求の範囲】[Claims] １つの親局が、限られた伝送帯域を有する監視制御線で
結ばれた複数の子局をポーリング方式によって制御して
、前記子局の監視項目を収集する遠隔監視方式において
、前記親局は特定の制御信号を送信する手段を備え、前
記子局は、前記特定の制御信号を受信した時、前記伝送
帯域内に配置され、各子局に側渦てられた単一周波数か
らなる信号を送信する手段、および自局の監視項目の状
態を監視し、監視項目に変化を認めた時に、前記単一周
波数からなる信号の送信を停止させる手段、さらに、前
記親局には前記単一周波数からなる信号を検出する手段
とを備えてなることを特徴とする遠隔監視方式。In a remote monitoring method in which one master station controls a plurality of slave stations connected by a supervisory control line having a limited transmission band using a polling method and collects monitoring items of the slave stations, the master station means for transmitting a specific control signal, and when the slave station receives the specific control signal, the slave station transmits a signal consisting of a single frequency placed within the transmission band and transmitted to each slave station. means for transmitting a signal, and means for monitoring the status of a monitoring item of its own station and stopping the transmission of a signal consisting of the single frequency when a change in the monitoring item is recognized; A remote monitoring system comprising: means for detecting a signal consisting of:
JP57104471A 1982-06-17 1982-06-17 Remote supervising system Pending JPS58220532A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57104471A JPS58220532A (en) 1982-06-17 1982-06-17 Remote supervising system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57104471A JPS58220532A (en) 1982-06-17 1982-06-17 Remote supervising system

Publications (1)

Publication Number Publication Date
JPS58220532A true JPS58220532A (en) 1983-12-22

Family

ID=14381494

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57104471A Pending JPS58220532A (en) 1982-06-17 1982-06-17 Remote supervising system

Country Status (1)

Country Link
JP (1) JPS58220532A (en)

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