JPS5820042A - Information transmitting method - Google Patents
Information transmitting methodInfo
- Publication number
- JPS5820042A JPS5820042A JP56119698A JP11969881A JPS5820042A JP S5820042 A JPS5820042 A JP S5820042A JP 56119698 A JP56119698 A JP 56119698A JP 11969881 A JP11969881 A JP 11969881A JP S5820042 A JPS5820042 A JP S5820042A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- optical fiber
- pulse
- information
- fiber
- 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
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/08—Time-division multiplex systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Optical Communication System (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は複数の長さの異なる光ファイバを配役して構成
される光遅延素子を用いた情報伝送方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an information transmission method using an optical delay element composed of a plurality of optical fibers of different lengths.
通信用光ファイバでは伝送損失を小さくするためと伝送
帯域幅をできるだけ確保するためにコアとクラッドの屈
折率差を小さく設計する。一般に屈折率差が小さければ
パルスの広がりが少なく、従って広帯域伝送が可能であ
る。この特性は第１図の特性図に示すようにＬの長さを
もつ光７アイパ″ＩＫ加えた入力光パルス２はその端末
における出力光パルス３のパルスの広が１３ｍは到着時
間・ｔで表わされ、その特性を示す数値社次式で表はさ
れる。Optical fibers for communications are designed to have a small refractive index difference between the core and cladding in order to reduce transmission loss and secure as much transmission bandwidth as possible. Generally, the smaller the refractive index difference, the less the pulse spread, and therefore broadband transmission is possible. As shown in the characteristic diagram of Figure 1, this characteristic is as follows: The input optical pulse 2 with the length L of the optical 7 eyeper ''IK is added to the input optical pulse 2, and the pulse spread of the output optical pulse 3 at the terminal is 13 m, which is the arrival time t. It is expressed as a numerical formula that shows its characteristics.
ノｔｙｎａｘ＝ΔｎＬ／Ｃ Δｎは前述の光ファイバのコアとクラッドの屈折率差。Notynax=ΔnL/C Δn is the refractive index difference between the core and cladding of the optical fiber mentioned above.
Ｌは光ファイバの長さ、Ｃは真空中の光速である。七−
ド分散によるパルス広が染の最大値は光ファイバのコア
とクラッドの屈折率差に比例し、光ファイバの長さに比
例する。従うて光ファイバの長さによって光パルスの遅
延時間が異なる特性を利用して遅延素子とし、この遅延
素子な複数配設して各種の情報を入力光パルスとして遠
隔地に伝送し、端末において受光器に出力光パルスとし
て受信する。例えば第２図のブロック図に示すように４
個の七ンサ人、Ｂ、Ｃ，Ｄからの情報を光ファイバに入
射し光ファイバ長の異なる遅延素子ＡＤ、ＢＤ、ＣＤ、
ＤＤを経由して、Ｐム、ｐｇＰｃ 、 Ｐｎ をなす出
力パルスを受光器Ｒ，，Ｒ，。L is the length of the optical fiber, and C is the speed of light in vacuum. Seven-
The maximum value of pulse broadening due to optical dispersion is proportional to the refractive index difference between the core and cladding of the optical fiber, and proportional to the length of the optical fiber. Therefore, by using the characteristic that the delay time of optical pulses differs depending on the length of the optical fiber, it is used as a delay element, and by arranging a plurality of such delay elements, various information is transmitted as input optical pulses to a remote location, and the light is received at a terminal. It is received by the device as an output optical pulse. For example, as shown in the block diagram of FIG.
The information from the seven speakers, B, C, and D is input into the optical fiber, and the delay elements AD, BD, CD, which have different optical fiber lengths,
The output pulses forming Pm, pgPc, and Pn are sent to the photoreceiver R,,R, via DD.
Ｒ，、Ｒ４に時分割的に伝送する。構成は簡単で、光７
アイパを用いるため外部からの電磁誘導雑音等を受けな
い情報伝送が得られるが、しかし複数の光ケーブルが必
要であるから特に遠隔地等への伝送の場合ケーブル敷設
のための費用が嵩む０本発明は上記の点に鑑み、積数の
光ファイバーを結合して一本の光ケーブルとし多重化を
計り、光学豹変イビ量を時分割的に検出する情報伝送方
法の提供を目的とする。R, , R4 in a time-division manner. The configuration is easy and the light 7
By using AIPA, information can be transmitted without being affected by electromagnetic induction noise from the outside, but since multiple optical cables are required, the cost of laying cables increases especially when transmitting to remote locations. In view of the above points, the object of the present invention is to provide an information transmission method in which a number of optical fibers are combined into a single optical cable for multiplexing, and the amount of optical sudden change is detected in a time-division manner.
上記目的は複数の長さの異なる光フィバを配設して光遅
延素子となし、該光遅延素子にセンサ装置を介して入力
される各センサ毎の変化量を光学的に伝送する情報伝送
方法において、骸光ファイバを１対ｎ個の結合カプラを
介して一本の光ファイバに結合し、その出力端において
前記センナ毎の変化量を受光器によ〉時分割的に検出す
る情報伝送方法及び一本の光ファイバからの光パルスを
複数の長さ−の異なる光ファイバよシなる光遅延素子の
各光ファイバに夫々入射し、骸光遅延素子からの出力を
結合カプラを介して一本の光ファイバに結合し、その出
力端において、時分割的に光パルスを検出する様にし九
情報伝送方法によって達成される。The above object is an information transmission method of arranging a plurality of optical fibers of different lengths to form an optical delay element, and optically transmitting the amount of change for each sensor inputted to the optical delay element via a sensor device. , an information transmission method in which skeleton optical fibers are coupled into a single optical fiber via 1:n coupling couplers, and at the output end of the optical fiber, the amount of change for each sensor is detected in a time-sharing manner by a light receiver. A light pulse from one optical fiber is input into each optical fiber of an optical delay element, which is made up of a plurality of optical fibers of different lengths, and the output from the optical delay element is coupled into one fiber through a coupler. This is accomplished by nine information transmission methods, in which optical pulses are detected in a time-division manner at the output end of the optical fiber.
以下本発明についてその実施例を図面によシ詳細に説明
する。Embodiments of the present invention will be described in detail below with reference to the drawings.
第３図は本発明の一実施例である光７アイパによる情報
伝送方法を示すブ四ツク図である。図のように長さの異
なる光ファイバ４に光パルス５を同期入射し、結合カプ
ラ６を介して伝送路を形成する光ファイバ７に結合し、
端末において受光器８によシ時分割的に検出する。例え
ば入射パルスにレンズアレイを用いて異なる画像を光パ
ルスとして入射し、伝送路を経由して送信し端末にて異
なる画像の情報を受信検出できる。このように一本の光
７アイパで複数の情報が伝送できるから経済的であり、
外部からの電磁誘導を受けにくい信頼性の高い光センサ
ーが得られる。FIG. 3 is a block diagram showing an information transmission method using an optical seven-eyeper which is an embodiment of the present invention. As shown in the figure, optical pulses 5 are synchronously injected into optical fibers 4 of different lengths, and are coupled via a coupling coupler 6 to an optical fiber 7 forming a transmission path.
The light is detected in a time-division manner by the light receiver 8 at the terminal. For example, a lens array is used for an incident pulse to make different images incident as light pulses, and the information on the different images can be received and detected at a terminal by transmitting them via a transmission path. In this way, multiple pieces of information can be transmitted with one optical 7-eyeper, making it economical.
A highly reliable optical sensor that is less susceptible to external electromagnetic induction can be obtained.
第４図は第３図の応用例である光ファイバを用いたカー
ド読取装置を示すブ關ツク図である。FIG. 4 is a block diagram showing a card reading device using an optical fiber, which is an applied example of FIG.
コリメーＦ用レンズアレイ９．１０の間にカード１１を
挿入し、光源１２から光パルス（λ〜Ｆ）を発すると前
述した第３図のように結合カプラ１３を介して伝送路１
４に導入され端末の受光器１５によりカード１１の情報
Ａ′〜ｎに、 Ｂ’ 〜ｎＢ’Ｃ′〜ｎＣＩ・・・・・
・ｐ／〜ｎＦ’を読取ることができる。When the card 11 is inserted between the lens arrays 9 and 10 for collimating F and a light pulse (λ to F) is emitted from the light source 12, it is transmitted to the transmission line 1 via the coupling coupler 13 as shown in FIG.
4, and the information A' to n of the card 11 is transmitted by the terminal light receiver 15 to B' to nB'C' to nCI...
-Can read p/~nF'.
第５図は本発明の他の実施例を示すブ四ツク図である。FIG. 5 is a block diagram showing another embodiment of the present invention.
図において、一本の光ファイノ（２１から長さの異なる
光７アイパ２２に分岐し各党ファイバ２２毎の情報をセ
ンナ２３で検出し、再び１本の光７アイパ２４に結合カ
プラ２ｓを介して結合し伝送する。その端末において受
光器２６によシ時分割された情報を得ることができる。In the figure, a single optical fiber (21) is branched into 7-eye optical fibers 22 of different lengths, information for each fiber 22 is detected by a sensor 23, and then connected to a single optical 7-eye optical fiber 24 via a coupler 2s. The time-divided information can be obtained by the optical receiver 26 at the terminal.
このように分岐、結合、検出回路を設けることによシ、
遠隔伝送する光ファイバを一本にすることができ、経済
的な情報伝送が可能となる。By providing branching, coupling, and detection circuits in this way,
Only one optical fiber can be used for remote transmission, making economical information transmission possible.
第６図の（イ）、（ロ）図は５図の応用例である光ファ
イバを用いて風向計のデータ伝送を示すブロック図（イ
）及びデータ記録図（ロ）を示す。羽根板２７と一体的
に回転する回転デスク２８を設はレンズアレイをなす検
出レンズ２９によりて平行ビームに変換し、受光レンズ
３０を介して風向きを伝送する光フアイバ装置である。Figures 6(a) and 6(b) show a block diagram (a) and a data recording diagram (b) showing data transmission of a wind vane using an optical fiber, which is an applied example of FIG. 5. It is an optical fiber device that includes a rotary disk 28 that rotates integrally with a blade plate 27, converts it into a parallel beam by a detection lens 29 forming a lens array, and transmits the direction of the wind via a light receiving lens 30.
光ファイバ３１を分光器３２′を介して図のように４ｇ
の長さの異なる光７アイパ３３に分岐し、レンズアレイ
２９．３０を経由して再びカプラ３４を介して一本の光
ファイバ３５に結合して遠隔伝送し、その端末において
受光器３６によりデータを検出する。そのデータ情報は
回転デスク２８に設けたスリット３７に対応して受光器
３６では回転角に応じたパルス符号が検出できることか
ら（ロ）図に示すようなデータを得て風向を検知する。The optical fiber 31 is passed through the spectrometer 32' to 4g as shown in the figure.
The light beams are branched into seven eyeglasses 33 with different lengths, passed through lens arrays 29 and 30, and then coupled to a single optical fiber 35 via a coupler 34 for remote transmission. Detect. The data information corresponds to the slit 37 provided in the rotary disk 28, and since the light receiver 36 can detect a pulse code corresponding to the rotation angle, the wind direction is detected by obtaining data as shown in FIG.
本発明の伝送方法、を用いることによυ半ファイバ一本
で遠隔伝送ができるから、経済的噂弧郁の電砿酵導を愛
社ない優れた情報伝送が可能となる等の効果がある・By using the transmission method of the present invention, it is possible to perform remote transmission with a single half-fiber, which has the effect of making it possible to transmit excellent information without having to rely on electrical transmission, which is rumored to be economical.・
第１図は光ファイバの特性を示す図、第２図は従来の情
報伝送方法を示す図、第３図は本発明の一実施例を示す
プルツク図、第４図は第３図の応用例で光ファイバを用
いたカード読取装置を示すブーツク図、第６図は本発明
の他の実旅例を示すブロック図、第６図の（イ）、（ロ
）図は第５図の応用例である。
図中、１，４，７．１４，２１，２２，２４゜３１．３
３．３１＄は光ファイバ、２．５祉入力光パルス、３は
出力光パルス、３ｍはパルスの広がシ、６．１３，２５
．３４はカプラ、８．１５゜２６．３６は受光器、３２
は分光器、２７は羽根板、２Ｂは回転デスク、２９線検
出レンズ、３０は受光レンズ、３７は透過光減衰部を示
す。Fig. 1 is a diagram showing the characteristics of an optical fiber, Fig. 2 is a diagram showing a conventional information transmission method, Fig. 3 is a Plutz diagram showing an embodiment of the present invention, and Fig. 4 is an application example of Fig. 3. Figure 6 is a block diagram showing another practical example of the present invention, and Figures (A) and (B) in Figure 6 are application examples of Figure 5. It is. In the figure, 1, 4, 7.14, 21, 22, 24°31.3
3.31$ is the optical fiber, 2.5cm is the input optical pulse, 3 is the output optical pulse, 3m is the pulse spread, 6.13, 25
．． 34 is a coupler, 8.15°26.36 is a receiver, 32
27 is a spectroscope, 27 is a blade plate, 2B is a rotary desk, 29 is a detection lens, 30 is a light receiving lens, and 37 is a transmitted light attenuator.
Claims (1)
間の異なる光遅延素子となし、該先週［素子の夫々に光
パルスを入射伝送する情報伝送方法において、該光遅延
素子の出力を結合カプラを介して一本の光ファイバに結
合し、その出力（２）１本の光ファイバからの光パルス
を複数の長さの異なる光ファイバよりなる光遅延素子の
各光ファイバに夫々入射し、該光遅延素子からの出力を
結合カプラを介して一本の光ファイバに結合し、その出
力端において、時分割的に光ノくルスを検出する様にし
たと七を特徴とする情報伝送方法。(1) In an information transmission method in which a plurality of optical fibers of different lengths are arranged to form optical delay elements with different delay times, the output of the optical delay element is is coupled to a single optical fiber via a coupling coupler, and the output (2) of the optical pulse from the single optical fiber is input to each optical fiber of an optical delay element consisting of multiple optical fibers of different lengths. and the output from the optical delay element is coupled to a single optical fiber via a coupling coupler, and the optical noculus is detected in a time-division manner at the output end of the optical fiber. Transmission method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56119698A JPS5820042A (en) | 1981-07-30 | 1981-07-30 | Information transmitting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56119698A JPS5820042A (en) | 1981-07-30 | 1981-07-30 | Information transmitting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5820042A true JPS5820042A (en) | 1983-02-05 |
Family
ID=14767851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56119698A Pending JPS5820042A (en) | 1981-07-30 | 1981-07-30 | Information transmitting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5820042A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6090443A (en) * | 1983-10-24 | 1985-05-21 | Fujikura Ltd | Optical pulse train forming device |
| DE3605152A1 (en) * | 1985-03-06 | 1986-09-11 | Hitachi, Ltd., Tokio/Tokyo | DRAIN CONTROL DEVICE AND DRAIN CONTROL METHOD |
| JPS6224943A (en) * | 1985-07-23 | 1987-02-02 | Osaka Kiko Co Ltd | Regular inspection, trouble-shooting and repairing method for machine tool |
| US5365358A (en) * | 1992-09-16 | 1994-11-15 | Siemens Aktiengesellschaft | Optical switching equipment for the through-connection of optical message cells |
-
1981
- 1981-07-30 JP JP56119698A patent/JPS5820042A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6090443A (en) * | 1983-10-24 | 1985-05-21 | Fujikura Ltd | Optical pulse train forming device |
| DE3605152A1 (en) * | 1985-03-06 | 1986-09-11 | Hitachi, Ltd., Tokio/Tokyo | DRAIN CONTROL DEVICE AND DRAIN CONTROL METHOD |
| JPS6224943A (en) * | 1985-07-23 | 1987-02-02 | Osaka Kiko Co Ltd | Regular inspection, trouble-shooting and repairing method for machine tool |
| JPH0255185B2 (en) * | 1985-07-23 | 1990-11-26 | Osaka Kiko Co Ltd | |
| US5365358A (en) * | 1992-09-16 | 1994-11-15 | Siemens Aktiengesellschaft | Optical switching equipment for the through-connection of optical message cells |
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