JPS62109447A - Transmission system - Google Patents
Transmission systemInfo
- Publication number
- JPS62109447A JPS62109447A JP60248013A JP24801385A JPS62109447A JP S62109447 A JPS62109447 A JP S62109447A JP 60248013 A JP60248013 A JP 60248013A JP 24801385 A JP24801385 A JP 24801385A JP S62109447 A JPS62109447 A JP S62109447A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- data
- signal
- transmitter
- test 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.)
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Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は伝送方式に係り、特に単一の伝送路により直列
に接続された複数の伝送装；ａから伝送路終端に接続さ
れたデータ収集装置にデータを伝送する伝送方式に関す
るものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a transmission method, and in particular, a plurality of transmission devices connected in series through a single transmission path; data collection connected from a to the end of the transmission path. This relates to a transmission method for transmitting data to a device.
［従来の技術］
単一伝送路、例えば一対の金属線あるいは１本の光ファ
イバによって多数の情報を伝送する手段として多重化伝
送技術があるが、一般に、時分割して０Ｎ１０ＦＦのデ
ジタル信号を直列に伝送する時分割多重伝送方式が多く
用いられている。[Prior Art] Multiplex transmission technology is a means of transmitting a large amount of information through a single transmission path, such as a pair of metal wires or a single optical fiber, but in general, 0N10FF digital signals are serially serialized in a time-division manner. A time division multiplex transmission method is often used.
さらに、伝送装置の低消！！ｉ電力化の要求′ｂ高まっ
てきており、例えば人里離れた遠隔地の情報を収集して
伝送しようとする場合には、単一伝送路に情報を送出す
る伝送装置用の電源として電池あるいは太陽電池等に頼
らざるを得ない。そこで、消費電力を低減させる方法と
して、必要な時のみ情報を伝送し、それ以外の時間は何
も伝送しない、づなわち伝送装置のデユーティ比を大幅
に低下させる方法がある。ところが、この方法では情報
の伝送時期が定まらないたｌに、伝送路の切断や伝送装
置の故障等により伝送機能が停止した状態を検知するこ
とができないという問題がある。In addition, the transmission equipment is low consumption! ! The demand for i-electric power is increasing, and for example, when collecting and transmitting information from remote areas, batteries or batteries are used as a power source for transmission equipment that sends information over a single transmission path. We have no choice but to rely on solar cells, etc. Therefore, as a method of reducing power consumption, there is a method of transmitting information only when necessary and transmitting nothing at other times, that is, significantly reducing the duty ratio of the transmission device. However, with this method, the timing of information transmission is not determined, and there is a problem in that it is not possible to detect a state in which the transmission function has stopped due to a disconnection of the transmission line, a failure of the transmission device, or the like.
このため、単一の伝送路に複数の伝送装置が直列に接続
された伝送システムでは、従来、各伝送装置が一定周期
毎に情報を伝送し続けて終端のデータ収集装置に一定周
期で情報が到達するように構成し、このデータ収集装置
に情報が到達しなくなったときに、伝送機能が停止した
ものと開所する伝送機能の停止状態検知方法が採られて
いた。For this reason, conventionally in a transmission system in which multiple transmission devices are connected in series on a single transmission path, each transmission device continues to transmit information at regular intervals, and the data collection device at the end receives information at regular intervals. When information no longer reaches the data collection device, the transmission function is stopped and the transmission function is restarted.
［発明が解決しようとする問題点］
しかしながら、上記の停止状態検知方法では各伝送装置
が伝送する必要の無い情報であっても一定周期毎に伝送
路に送出しなければならない。従って、伝送装置のデユ
ーティ比が増加し、消費電力の低減化を図ることができ
ないという問題点があった。[Problems to be Solved by the Invention] However, in the stop state detection method described above, even information that does not need to be transmitted by each transmission device must be sent to the transmission path at regular intervals. Therefore, there is a problem in that the duty ratio of the transmission device increases, making it impossible to reduce power consumption.
［発明の目的］
本発明の目的は前記した従来技術の問題点を解消し、伝
送路の切断や伝送装置の故障等による伝送機能の停止を
常時に祝することができ、且つ伝送装置の消費電力を低
減することができる伝送方式を提供プることにある。[Object of the Invention] The object of the present invention is to solve the problems of the prior art described above, to be able to always prevent the transmission function from being stopped due to disconnection of the transmission line or failure of the transmission equipment, and to reduce the consumption of the transmission equipment. The objective is to provide a transmission method that can reduce power consumption.
［発明の［要］
本発明は上記目的を達成するために、単一の伝送路によ
り直列に接続された複数の伝送装置と、上記中−の伝送
路の最下流端に接続されたデータ収集装置とから構成さ
れ、各伝送装置からの情報が不流側の伝送装置で中継さ
れながらデータ収集装置へ伝送される伝送システムにお
いて、上記伝送路の最上流端に、所定の周期で伝送機能
検定信号を発生しこれを伝送路の一ト流側に送出する検
定信号発生部を設け、各伝送装置は、上記所定の周期で
伝送機能検定信号を受信した場合には直ちにこの伝送機
能検定信号を伝送路に送出し、上記所定の周期で伝送機
能検定信号を受信できない場合には伝送機能の異常を示
す異常信号を発生させてこれを伝送路に送出し、異常信
号を受信した場合には直ちにこの異常信号を伝送路に送
出すると共に、各伝送装置のデータが更新されたときに
は随時その更新データを伝送路に送出し、データ収集装
置は異常信号を受信することによって伝送機能の異常を
検知するものである。[Summary of the Invention] In order to achieve the above object, the present invention includes a plurality of transmission devices connected in series through a single transmission path, and a data collection device connected to the most downstream end of the transmission path in the middle. In a transmission system in which information from each transmission device is relayed by an outstream transmission device and transmitted to a data collection device, a transmission function test is performed at a predetermined period at the most upstream end of the transmission path. A verification signal generation unit is provided that generates a signal and sends it to the first stream side of the transmission path, and when each transmission device receives the transmission function verification signal at the predetermined cycle, it immediately transmits the transmission function verification signal. If the transmission function verification signal cannot be received at the above-determined period, an abnormal signal indicating an abnormality in the transmission function is generated and sent to the transmission path, and when the abnormal signal is received, the signal is immediately transmitted. This abnormality signal is sent to the transmission path, and whenever the data of each transmission device is updated, the updated data is sent to the transmission path, and the data collection device detects an abnormality in the transmission function by receiving the abnormality signal. It is something.
［実施例〕 以下、添付図面を参照して本発明の詳細な説明でる。[Example〕 The present invention will now be described in detail with reference to the accompanying drawings.
第１図は本発明の伝送方式を適用した伝送系統図である
。図中、１は伝送路としての光ファイバ（゛あり、この
光ファイバ１によって伝送装置２〜５ ａ３よびデータ
収集装置６が直列に接続されている。伝送装置２〜５に
は各々データＤ２〜Ｄ５が入力されている。また、伝送
路の最上流に位置する伝送装置２には検定信号発生部７
が内蔵されており、ここから周期Ｔで伝送機能検定信号
（双手、検定信号どする）Ｐが発生し、光ファイバ１に
送出されている。次段以降の各伝送装置３〜５は上流側
の伝送装置から受信した情報を中継して下流側の伝送装
置あるいはデータ収集装置６に伝送するが、検定信号Ｐ
を受信したどきに限り、自らの伝送装置に内蔵されてい
るタイマをリセットして計時を始める。そして、タイマ
が所定の時間τ（〉■）を計時して５次の検定信号Ｐが
上流側の伝送装置から受信できない場合には、伝送機能
の異常を示す異常信号Ｓｃを発生し、下流側へ送出する
。FIG. 1 is a transmission system diagram to which the transmission method of the present invention is applied. In the figure, reference numeral 1 denotes an optical fiber (D) as a transmission path, through which transmission devices 2 to 5a3 and a data collection device 6 are connected in series.The transmission devices 2 to 5 each have data D2 to D5 is input.Furthermore, the verification signal generator 7 is input to the transmission device 2 located at the most upstream side of the transmission path.
is built in, from which a transmission function verification signal (two-handed verification signal) P is generated at a period T and sent to the optical fiber 1. Each of the transmission devices 3 to 5 from the next stage onwards relays the information received from the upstream transmission device and transmits it to the downstream transmission device or data collection device 6, but the verification signal P
Only when it receives this, it resets the timer built into its own transmission device and starts timing. Then, if the timer measures a predetermined time τ (>■) and the fifth-order verification signal P cannot be received from the upstream transmission device, it generates an abnormal signal Sc indicating an abnormality in the transmission function, and Send to.
次に、第２図のタイムヂャートを参照して本実施例の伝
送方式を説明する。Next, the transmission system of this embodiment will be explained with reference to the time chart shown in FIG.
まず、時刻ｔ１に検定信号発生部７で検定信号Ｐが発生
し、伝送装置２を介して下流側の伝送装置３に送信され
る。伝送装置３は検定信号Ｐを受信すると、内蔵タイマ
をリセットして計時を開始させると共に検定信号Ｐを伝
送装置４へ送信する。First, at time t1, a test signal P is generated in the test signal generator 7, and is transmitted to the downstream transmission device 3 via the transmission device 2. When the transmission device 3 receives the verification signal P, it resets the built-in timer to start timing, and transmits the verification signal P to the transmission device 4.
このようにして、検定信号Ｐが伝送装置３，４゜５で中
継されてデータ収集装置６に入力する一方、各伝送装置
内のタイマがリセットされて始動する。In this way, the verification signal P is relayed by the transmission devices 3, 4.5 and input to the data collection device 6, while the timer in each transmission device is reset and started.
また、検定信号Ｐを入力したデータ収集装置６はシステ
ム全体の伝送機能が正常に作用していることを確認する
。Furthermore, the data collection device 6 that receives the verification signal P confirms that the transmission function of the entire system is functioning normally.
次に、時刻ｔ１から周期Ｔ経過後の時刻ｔ２には再び検
定信号発生部７から検定信号Ｐが発生し、伝送装置３に
送信される。伝送装置３ではタイマが時間τを計時する
前に検定信号Ｐを受信したので、タイマをリセットして
検定信号Ｐを伝送装置４へ送出する。Next, at time t2 after a period T has elapsed from time t1, the verification signal P is again generated from the verification signal generating section 7 and transmitted to the transmission device 3. Since the transmission device 3 received the verification signal P before the timer counted the time τ, the timer is reset and the verification signal P is sent to the transmission device 4.
ここで、伝送装置３および４を連結する児ファイバ１が
何らかの理由で切断されたものとすると、伝送装置３か
ら送出された検定信＠ ｐ ｊｅｔ １ムベ装置４へ到
達することができない。従って、伝送装置４ではタイマ
が時間τを計時した時刻１３になっても検定信号Ｐを受
信することができないので、異常信号Ｓｃを発生し、伝
送装置５を介してデータ収集装置６へ伝送する。そして
、異常信号Ｓ〔を入力することによりデータ収集装置６
は伝送機能の異常を検知する。Here, if the fiber 1 connecting the transmission devices 3 and 4 is cut for some reason, the verification signal sent from the transmission device 3 cannot reach the transmission device 4. Therefore, the transmission device 4 cannot receive the verification signal P even at time 13 when the timer has counted the time τ, so it generates an abnormal signal Sc and transmits it to the data collection device 6 via the transmission device 5. . Then, by inputting the abnormal signal S, the data collection device 6
detects an abnormality in the transmission function.
また、例えば時刻ｔ４のように伝送装＠４に入力されて
いるデータＤ４が変化した場合には即座に新しいデータ
Ｄ４が伝送装置５を介してデータ収集装置６に伝送され
る。Furthermore, when the data D4 input to the transmission device @4 changes, for example at time t4, new data D4 is immediately transmitted to the data collection device 6 via the transmission device 5.
従って、データ収集装置６に受信されるデータ列は常時
は検定信号Ｐのみとなり、各伝送装置のデユーティを大
幅に低減することができる。また、各伝送装置からのデ
ータＤ２〜Ｄ５はそれ自体に変化があった時のみ伝送さ
れるので不要データの伝送がなくなり、各伝送装はの動
作時間を効率的に軽減でき、これに伴う消費電力の大幅
な低減が達成される。Therefore, the data string received by the data collection device 6 is always only the test signal P, and the duty of each transmission device can be significantly reduced. In addition, since data D2 to D5 from each transmission device is transmitted only when there is a change in itself, there is no need to transmit unnecessary data, and the operating time of each transmission device can be efficiently reduced. A significant reduction in power is achieved.
なＪ３、第３図に本発明＋１７）伝送方式に用いること
のできる直列データの伝送７オーマツト・′、）−例を
示す。１０は伝送単位としての１フレームの構造であり
、スタートごット１０１とスト・ソ１ビット１０３とに
挟まれてデータビット１０２が伝送される。１１は周期
的に伝送システムを流れる検定信号Ｐを示し、検定信号
であることを識別する識別符号１１１の１フレームのみ
で構成されている。FIG. 3 shows an example of a serial data transmission system that can be used in the present invention +17) transmission system. 10 is the structure of one frame as a transmission unit, and a data bit 102 is transmitted sandwiched between a start bit 101 and a start bit 103 and a start bit 103. Reference numeral 11 indicates a verification signal P that periodically flows through the transmission system, and is composed of only one frame with an identification code 111 identifying the verification signal.
１２はデータを示し、データであることを識別する識別
符号１２１と伝送装置アドレス１２２と上流側の伝送機
能診断情報１２３と自己データ１２４．１２５・・・に
よって構成されている。12 indicates data, and is composed of an identification code 121 for identifying data, a transmission device address 122, upstream transmission function diagnostic information 123, and self-data 124, 125, . . . .
このように、周期的に伝送される検定信号１１は時間的
に極め−で短く構成できるので、常時の各伝送装置の負
担を軽減し消費電力を低減することが可能となる。例え
ば、光ファイバを通して光伝送するためにはＬＥＤ等の
発光素子に電流を流して入力信号に応じた発光をさせる
必要があるが、この電流は無信号時には不要となるので
信号の伝送時間を短くすることにより、平均消費電力が
低減される。In this way, the test signal 11 that is periodically transmitted can be configured to be extremely short in terms of time, so that it is possible to reduce the load on each transmission device at all times and reduce power consumption. For example, in order to transmit light through an optical fiber, it is necessary to apply current to a light emitting element such as an LED to emit light according to the input signal, but this current is not needed when there is no signal, so the signal transmission time is shortened. By doing so, the average power consumption is reduced.
次に、本発明の他の実施例を適用した伝送系統図を第４
図に示す。この実施例では、第１図の伝送システムにお
いて最上流側の伝送装置２に内蔵されていた検定信号発
生部７をデータ収集装置６に内蔵し、データ収集装置６
と伝送装置２とを直接光ファイバ１で接続して環状の光
フアイバ伝送路を構成したものである。そして、検定信
号発生部７で発生した検定信号Ｐがデータ収集装置６か
ら最上流の伝送装置２へ直接伝送され、次いで伝送装置
３，４．５と下流側に向かって中継伝送されてデータ収
！！装置６に戻される。Next, a fourth transmission system diagram to which another embodiment of the present invention is applied is shown.
As shown in the figure. In this embodiment, the test signal generator 7, which was built in the transmission device 2 on the most upstream side in the transmission system shown in FIG. 1, is built into the data collection device 6.
and a transmission device 2 are directly connected by an optical fiber 1 to form a ring-shaped optical fiber transmission line. The test signal P generated by the test signal generator 7 is directly transmitted from the data collection device 6 to the most upstream transmission device 2, and then relayed to the transmission devices 3, 4.5 and downstream to collect data. ! ! It is returned to the device 6.
このような方式とすることにより、各伝送装置２〜５を
全て同一の構成とすることができると共に、検定信号発
生部７に故障等の異常が生じた場合には即座にデータ収
集装置６でこれを検知し対応することができる。By adopting such a system, all of the transmission devices 2 to 5 can have the same configuration, and if an abnormality such as a failure occurs in the verification signal generation section 7, the data collection device 6 can immediately respond. This can be detected and dealt with.
なお、上記２つの実施例では伝送路として光ファイバを
用いたが、これに限るものではなく金属ケーブルでもよ
い。Note that in the above two embodiments, an optical fiber was used as the transmission path, but the transmission path is not limited to this, and a metal cable may also be used.
［発明の効果］
以上説明したように本発明によれば、次のごとき優れた
効果を発揮Ｊる。[Effects of the Invention] As explained above, according to the present invention, the following excellent effects can be achieved.
（１） 時間的に極く短い伝送機能検定信号のみを各
伝送装置で中継伝送させるために、伝送路の切断、伝送
装置の故障等の伝送機能の停止を常時監視することが可
能となると共に各伝送装置のデユーティを大幅に低減す
ることができる。(1) In order to relay and transmit only the extremely short transmission function test signal at each transmission device, it is possible to constantly monitor transmission function stoppages such as disconnection of the transmission line or failure of the transmission device. The duty of each transmission device can be significantly reduced.
（２） 伝送すべき情報に変化が起きた時のみ各伝送
装置から情報データが送出されるために不要データの伝
送がなく、伝送システム全体のデユーティを低減するこ
とができる。従って、各伝送装置の消ｇｔ電力の低減化
が達成される。(2) Since information data is sent from each transmission device only when a change occurs in the information to be transmitted, there is no transmission of unnecessary data, and the duty of the entire transmission system can be reduced. Therefore, a reduction in the dissipation gt power of each transmission device is achieved.
第１図は本発明の一実施例に係る伝送方式を適用した伝
送系統図、第２図は第１図における伝送手順を示すタイ
ムチャート、第３図は本発明の伝送方式に適用できる直
列データの伝送フォーマットを示す説明図、第４図は他
の実施例を示づ一伝送系統図である。
図中、１は光ファイバ、２〜５は伝送装置、６はデータ
収集装置、７は検定信号発生部、Ｐは伝送機能検定信号
、Ｓｓは異常信号である。Fig. 1 is a transmission system diagram to which a transmission method according to an embodiment of the present invention is applied, Fig. 2 is a time chart showing the transmission procedure in Fig. 1, and Fig. 3 is serial data applicable to the transmission method of the present invention. FIG. 4 is a transmission system diagram showing another embodiment. In the figure, 1 is an optical fiber, 2 to 5 are transmission devices, 6 is a data collection device, 7 is a test signal generator, P is a transmission function test signal, and Ss is an abnormal signal.
Claims (3)
装置と、上記単一の伝送路の最下流端に接続されたデー
タ収集装置とから構成され、各伝送装置からの情報が下
流側の伝送装置で中継されながら上記データ収集装置へ
伝送される伝送システムにおいて、上記伝送路の最上流
端に、所定の周期で伝送機能検定信号を発生しこれを上
記伝送路の下流側に送出する検定信号発生部を設け、各
伝送装置は、上記所定の周期で伝送機能検定信号を受信
した場合には直ちにこの伝送機能検定信号を伝送路に送
出し、上記所定の周期で伝送機能検定信号を受信できな
い場合には伝送機能の異常を示す異常信号を発生させて
これを伝送路に送出し、異常信号を受信した場合には直
ちにこの異常信号を伝送路に送出すると共に、各伝送装
置のデータが更新されたときには随時その更新データを
伝送路に送出し、上記データ収集装置は異常信号を受信
することによって伝送機能の異常を検知することを特徴
とする伝送方式。(1) Consists of multiple transmission devices connected in series through a single transmission path and a data collection device connected to the most downstream end of the single transmission path, and information from each transmission device is transmitted downstream. In a transmission system in which data is transmitted to the data collection device while being relayed by a side transmission device, a transmission function test signal is generated at a predetermined period at the most upstream end of the transmission path and is sent to the downstream side of the transmission path. A test signal generation section is provided to transmit the transmission function test signal, and each transmission device, when receiving the transmission function test signal at the predetermined period, immediately sends the transmission function test signal to the transmission path, and generates the transmission function test signal at the predetermined period. If the signal cannot be received, an abnormal signal indicating an abnormality in the transmission function is generated and sent to the transmission line, and when an abnormal signal is received, this abnormal signal is immediately sent to the transmission line, and each transmission equipment A transmission method characterized in that when data is updated, the updated data is sent to a transmission path whenever the data is updated, and the data collection device detects an abnormality in the transmission function by receiving an abnormal signal.
徴とする特許請求の範囲第１項記載の伝送方式。(2) The transmission system according to claim 1, wherein the single transmission path is composed of an optical fiber.
され、上記単一の伝送路が環状に閉じていることを特徴
とする特許請求の範囲第１項または第２項記載の伝送方
式。(3) The transmission system according to claim 1 or 2, wherein the test signal generating section is built into the data acquisition device, and the single transmission path is closed in an annular shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60248013A JPS62109447A (en) | 1985-11-07 | 1985-11-07 | Transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60248013A JPS62109447A (en) | 1985-11-07 | 1985-11-07 | Transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62109447A true JPS62109447A (en) | 1987-05-20 |
Family
ID=17171894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60248013A Pending JPS62109447A (en) | 1985-11-07 | 1985-11-07 | Transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62109447A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04337937A (en) * | 1991-05-15 | 1992-11-25 | Nec Corp | Device inside monitoring system for transmitter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5481702A (en) * | 1977-12-13 | 1979-06-29 | Mitsubishi Electric Corp | Data delivery circuit |
| JPS57157662A (en) * | 1981-03-24 | 1982-09-29 | Nec Corp | Remote monitoring system |
| JPS58123255A (en) * | 1982-01-18 | 1983-07-22 | Hitachi Ltd | Detection system for fault position of single loop transmission system |
| JPS59212050A (en) * | 1983-05-18 | 1984-11-30 | Hitachi Cable Ltd | Data collection system |
-
1985
- 1985-11-07 JP JP60248013A patent/JPS62109447A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5481702A (en) * | 1977-12-13 | 1979-06-29 | Mitsubishi Electric Corp | Data delivery circuit |
| JPS57157662A (en) * | 1981-03-24 | 1982-09-29 | Nec Corp | Remote monitoring system |
| JPS58123255A (en) * | 1982-01-18 | 1983-07-22 | Hitachi Ltd | Detection system for fault position of single loop transmission system |
| JPS59212050A (en) * | 1983-05-18 | 1984-11-30 | Hitachi Cable Ltd | Data collection system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04337937A (en) * | 1991-05-15 | 1992-11-25 | Nec Corp | Device inside monitoring system for transmitter |
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