JPS6218853A - Time synchronization system - Google Patents
Time synchronization systemInfo
- Publication number
- JPS6218853A JPS6218853A JP60158526A JP15852685A JPS6218853A JP S6218853 A JPS6218853 A JP S6218853A JP 60158526 A JP60158526 A JP 60158526A JP 15852685 A JP15852685 A JP 15852685A JP S6218853 A JPS6218853 A JP S6218853A
- Authority
- JP
- Japan
- Prior art keywords
- data transmission
- signal
- synchronization
- synchronization signal
- synchronizing signal
- 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.)
- Granted
Links
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
- Communication Control (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
本発明は、直列信号を用いて遠隔地にある装置にデータ
を伝送するようなシステムにおいて、遠隔地にある装置
の時間を同期化させるための時間同期化方式ｌこ関する
。[Detailed Description of the Invention] [Technical Field to which the Invention Pertains] The present invention relates to a system for synchronizing the time of devices at remote locations in a system that transmits data to devices at remote locations using serial signals. This relates to a time synchronization method.
制御局と遠隔地にある被制御局とを伝送線で結び、伝送
線を介して情報伝送を行なうことにより制御局で被制御
局を監視制御するようにした遠方監視制御装置等におい
ては、制御局と被！制御局とで情報の同時性や装置間の
同期を保つために時間に関する同期をとることが行なわ
れる。従来の時間に関する同期化方式を第３図を用いて
説明する。In remote monitoring and control equipment, etc., in which a control station and a controlled station in a remote location are connected by a transmission line, and the control station monitors and controls the controlled station by transmitting information via the transmission line, Bureau and cover! Time synchronization is performed with the control station to maintain the simultaneity of information and synchronization between devices. A conventional time synchronization method will be explained with reference to FIG.
第３図は遠方監視制御装置の概略構成図を示しており、
図において、制御所にはデータ伝送用変調器１．同期化
信号発生器３．同期化信号用変調器４、トランス８が設
けられ、また被制御所にはデータ伝送用復調器２ａ、２
ｂ、同期化信号用復調器５ａ、５ｂｚ被同期化機器６ａ
、５ｂ、ｌ−ランス９，１０ａ。Figure 3 shows a schematic configuration diagram of the remote monitoring and control device.
In the figure, the control center includes a data transmission modulator 1. Synchronization signal generator 3. A synchronization signal modulator 4 and a transformer 8 are provided, and data transmission demodulators 2a and 2 are provided at the controlled station.
b, synchronization signal demodulator 5a, 5bz synchronized device 6a
, 5b, l-lance 9, 10a.
１０ｂが設けられており、制御所と被制御所とは伝送路
７で接続されている。なお、この例においては被制御所
は２カ所設けられている。このような構成において、通
常データ伝送用変調器１と同期化信号用変調器４を個別
に設け、夫々の変調器の副搬送波ｆ、、ｆ２を異なった
周波数を用いる。デーランス１０ａ 、 １０ｂを介し
てデータ伝送用復調器２ａ、２ｂに伝送する。これに対
して、同期化を行なう際には同期化信号発生器１からの
信号ｌこより同期化信号用変調器４からの副搬送波ｆ、
による信号をトランス８、伝送路７、トランス９、トラ
ンス１．０ａ 、 １０ｂ 、同期化信号用復調器５ａ
、５ｂを介して被同期化機器６ａ、６ｂに伝送する。こ
れにより同期化信号をデータと同一の伝送線を用いて伝
送することができる。しかし、このような構成では、伝
送線を１回線しか用意することができず、かつデータ伝
送速度が速くなって（６００ＢＰＳ以上）１回線に複数
の周波数が伝送できない場合には同期化することが不可
能であった。10b is provided, and the control station and the controlled station are connected by a transmission line 7. In this example, two controlled stations are provided. In such a configuration, the data transmission modulator 1 and the synchronization signal modulator 4 are normally provided separately, and the subcarriers f, f2 of the respective modulators use different frequencies. The data is transmitted to data transmission demodulators 2a and 2b via de-rances 10a and 10b. On the other hand, when performing synchronization, the subcarrier f from the synchronization signal modulator 4 is transmitted from the signal l from the synchronization signal generator 1,
The signal is transmitted through transformer 8, transmission line 7, transformer 9, transformers 1.0a and 10b, and synchronization signal demodulator 5a.
, 5b to the synchronized devices 6a, 6b. This allows the synchronization signal to be transmitted using the same transmission line as the data. However, in such a configuration, if only one transmission line can be prepared and the data transmission speed is too high (600 BPS or more) to transmit multiple frequencies on one line, synchronization cannot be performed. It was impossible.
本発明は、１回線に複数の周波数が使用できない場合に
おいて、データ伝送用の変復調器を用いて遠隔地にある
装置の時間に関する同期化方式を促供することを目的と
する。SUMMARY OF THE INVENTION It is an object of the present invention to facilitate a time synchronization method for devices in remote locations using a modem for data transmission when multiple frequencies cannot be used on one line.
本発明はデータ伝送に使用している変復調器を用いて同
期化信号を伝送するもので、同期化信号発生器及び同期
化信号受信器により構成することにより通常のデータ伝
送符号にない符号系列を使用し、同期化信号を伝送する
もので、データ伝送用変復調器を使用して遠隔地にある
装置の時間に関する同期化を実現するものである。The present invention transmits a synchronization signal using a modulator/demodulator used for data transmission, and by comprising a synchronization signal generator and a synchronization signal receiver, code sequences that are not found in ordinary data transmission codes can be transmitted. It is used to transmit a synchronization signal, and uses a data transmission modem to realize time synchronization of devices at remote locations.
第１図は本発明における同期化方式を実施するための装
置の構成図を示している。図において、制御所にはデー
タ伝送用信号発生器１１、同期化信号発生器１２、信号
切換スイッチ１３、データ伝送用変調器１４が設けられ
ており、また被制御所にはデータ伝送用受信部１５、同
期化信号受信部１６、同期化機器１７、データ伝送用復
調器１８が設けられている。このような構成において、
同期化信号発生器１２から出力される同期化信号用符号
は通常のデータ伝送符号にない信号を用いるものとし、
例えば通常のデータ伝送の際に用いられるデータ伝送用
同期信号用符号が第２図（ａ）であるとすると同期化信
号用符号は第２図（ｂ）に示すように反転させたものと
する。FIG. 1 shows a block diagram of a device for implementing the synchronization method according to the present invention. In the figure, the control station is provided with a data transmission signal generator 11, a synchronization signal generator 12, a signal changeover switch 13, and a data transmission modulator 14, and the controlled station is equipped with a data transmission receiving section. 15, a synchronization signal receiving section 16, a synchronization device 17, and a data transmission demodulator 18. In such a configuration,
The synchronization signal code output from the synchronization signal generator 12 uses a signal that is not a normal data transmission code,
For example, if the data transmission synchronization signal code used during normal data transmission is as shown in Figure 2(a), the synchronization signal code is inverted as shown in Figure 2(b). .
通常のデータ伝送の際には信号切換スイッチ１３は図示
の位置にあるのでデータ伝送用信号発生器１１から出力
されるデータは信号切換スイッチ１３、データ伝送用変
調器１４、伝送路１９、データ伝送用復調器１８を介し
てデータ伝送用受信部１５に伝送される。このとき、同
期化信号受信部１６にもデータが伝送さ、！するが、こ
のデータ伝送の符号は同期化信号用符号とは異なるので
そこで判別されて同期化は行なわれない。これに対して
、同期化を行なう場合には、信号スイッチ１３を図示と
は反対側に切換えたのち、同期化信号発生器１２より同
期化信号を出力すると、この同期化信号は信号切換スイ
ッチ１３、データ伝送用変調器１４、伝送路１９、デー
タ伝送用復調器１８を介して同期化信号受信部１６に伝
送され、同期化機器１７の同期化が行なわれる。このと
き、データ伝送用受信部１５にも同期化信号が伝送され
るが、この同期化信号用符号は通常のデータ伝送の符号
とは異なるのでそれにより判別されてデータとしては受
信されない。これｌこより、データ伝送用の変復調器を
用いて同期化イキ号を伝送することができる。During normal data transmission, the signal changeover switch 13 is in the position shown in the figure, so the data output from the data transmission signal generator 11 is transferred to the signal changeover switch 13, the data transmission modulator 14, the transmission line 19, and the data transmission The data is transmitted to the data transmission receiving section 15 via the data demodulator 18. At this time, data is also transmitted to the synchronization signal receiving section 16! However, since the code of this data transmission is different from the code for the synchronization signal, it is determined there and no synchronization is performed. On the other hand, when performing synchronization, the synchronization signal generator 12 outputs a synchronization signal after switching the signal switch 13 to the side opposite to that shown in the figure. , the data transmission modulator 14, the transmission path 19, and the data transmission demodulator 18 to the synchronization signal receiving section 16, where the synchronization device 17 is synchronized. At this time, a synchronization signal is also transmitted to the data transmission receiving section 15, but since this synchronization signal code is different from a normal data transmission code, it is discriminated based on it and is not received as data. From this, it is possible to transmit the synchronized key signal using a modem for data transmission.
本発明によれば、データ伝送用の変復調器を用いて同期
化信号を伝送するもので、伝送路を分離あるいは変復調
器を専用に設けることなく、同期化信号を伝送可能とな
る効果が得られる。According to the present invention, a synchronization signal is transmitted using a modem for data transmission, and it is possible to transmit the synchronization signal without separating a transmission path or providing a dedicated modem. .
第１図は本発明による時間同期化方式を実施すをための
装置の概略構成図、第２図は本発明において用いられる
同期化信号の説明図、第３図は従゛来の時間同期化方式
を説明するための図である。
１１・・・データ伝送用信号発生器、１２・・・同期化
信号発生器、１３・・・信号切換スイッチ、１４・・・
データ伝送用変調器、１５・・・データ伝送用受信部、
１６・・・同期化信号受信部、１７・・・被同期化機器
、１８・・・データ伝送用復調器、１９・・・伝送路。FIG. 1 is a schematic configuration diagram of a device for implementing the time synchronization method according to the present invention, FIG. 2 is an explanatory diagram of a synchronization signal used in the present invention, and FIG. 3 is a diagram of a conventional time synchronization method. FIG. 2 is a diagram for explaining the method. DESCRIPTION OF SYMBOLS 11... Data transmission signal generator, 12... Synchronization signal generator, 13... Signal changeover switch, 14...
Modulator for data transmission, 15... Receiving section for data transmission,
16... Synchronization signal receiving unit, 17... Device to be synchronized, 18... Demodulator for data transmission, 19... Transmission line.
Claims (1)
する同期をとる時間同期化方式において、通常のデータ
伝送符号にない符号の同期化信号を発生する同期化信号
発生器を設け、該同期化信号を通常のデータ伝送経路に
て遠隔地にある装置に伝送し、該装置において同期化信
号であるかどうかを判別して同期化を行なうことを特徴
とする時間同期化方式。1) In a time synchronization method that synchronizes time by transmitting a synchronization signal to a device at a remote location, a synchronization signal generator is provided that generates a synchronization signal of a code that is not included in the normal data transmission code, and A time synchronization method characterized in that a synchronization signal is transmitted to a device at a remote location via a normal data transmission path, and the device determines whether the signal is a synchronization signal and performs synchronization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60158526A JPH0646745B2 (en) | 1985-07-18 | 1985-07-18 | Time synchronization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60158526A JPH0646745B2 (en) | 1985-07-18 | 1985-07-18 | Time synchronization method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6218853A true JPS6218853A (en) | 1987-01-27 |
| JPH0646745B2 JPH0646745B2 (en) | 1994-06-15 |
Family
ID=15673658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60158526A Expired - Lifetime JPH0646745B2 (en) | 1985-07-18 | 1985-07-18 | Time synchronization method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0646745B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5630340A (en) * | 1979-08-20 | 1981-03-26 | Sony Corp | Digital signal transmitting method |
| JPS60109347A (en) * | 1983-11-18 | 1985-06-14 | Toshiba Corp | Polling type remote monitor controller |
-
1985
- 1985-07-18 JP JP60158526A patent/JPH0646745B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5630340A (en) * | 1979-08-20 | 1981-03-26 | Sony Corp | Digital signal transmitting method |
| JPS60109347A (en) * | 1983-11-18 | 1985-06-14 | Toshiba Corp | Polling type remote monitor controller |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0646745B2 (en) | 1994-06-15 |
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