JPS5960338A - Optical fiber locator - Google Patents
Optical fiber locatorInfo
- Publication number
- JPS5960338A JPS5960338A JP17198882A JP17198882A JPS5960338A JP S5960338 A JPS5960338 A JP S5960338A JP 17198882 A JP17198882 A JP 17198882A JP 17198882 A JP17198882 A JP 17198882A JP S5960338 A JPS5960338 A JP S5960338A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- data
- locator
- displayed
- stored
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
- G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
Abstract
Description
【発明の詳細な説明】
（ａ） 発明の技術分野
本発明は光ファイバの特性劣化等の測定方式に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a method for measuring characteristic deterioration, etc. of an optical fiber.
（ｂ） 従来技術と問題点
従来の光ファイバ・ロケータでは測定結果をアナログ的
に処理し、ブラウン管上に表示して写真撮影したシ、Ｘ
Ｙレコーダに表示していた。従って過去の測定データと
新しい測定データとの比較をすること一１大変手間〃址
［っていた。このことは光ファイバを使用する通信回線
の保守をする上で大変不便なことで６った。(b) Conventional technology and problems Conventional optical fiber locators process measurement results in an analog manner, display them on a cathode ray tube, and take photographs.
It was displayed on the Y recorder. Therefore, it was very time consuming to compare past measurement data with new measurement data. This is extremely inconvenient when maintaining communication lines that use optical fibers.
（ｃ）発明の目的
本発明の目的は上記従来技術の欠点を除去し、良好な光
ファイバ・ロケータ”を提供することである。(c) Object of the Invention The object of the present invention is to eliminate the drawbacks of the above-mentioned prior art and provide a good optical fiber locator.
ω）発明の構成
本発明によれば、光ファイバ・ケーブルを使用する通イ
、１回腺において、前記光ファイバ・ケーブルに関する
過去に実施した測定データを装（ｉの内部か、または外
部に記憶する機能を持ち、且つ前記の記憶データと〃１
しく測定して得られたデータとを比較することにより経
時変化に関するデータの表示機能を持つことを特徴とす
る光ファイバ・ロケータを提供することによシ達成され
る。ω) Structure of the Invention According to the present invention, each time an optical fiber cable is used, measurement data performed in the past on the optical fiber cable is stored (internally or externally). It has the function of
This is achieved by providing an optical fiber locator characterized in that it has a function of displaying data regarding changes over time by comparing the data obtained through proper measurements.
（ｅ） 発明の実施例
以下本発明の実施例を図面によって詳＃Ｉに説すＪする
。第１図は木兄り１の一実施例を示す光ファイバ・ロケ
ータの構成図で、工はクロック部、２はレーザ・ダイオ
ード、３はカプラ、４は光ファイバ・ケーブル、５はア
バ２ンシエ・フォト・ダイオード、６はアンプ、７けＡ
／Ｄ変換器、８は加算器、９を１処理部、１０はメモｌ
ハ １１は演１・Ｔ部。(e) Embodiments of the Invention Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a configuration diagram of an optical fiber locator showing an embodiment of Kinori 1, in which numeral 1 is a clock section, 2 is a laser diode, 3 is a coupler, 4 is an optical fiber cable, and 5 is an abacus.・Photo diode, 6 is amplifier, 7 A
/D converter, 8 is an adder, 9 is 1 processing unit, 10 is memory l
C 11 is performance 1, T section.
１２は社示Ｍへである。12 is to Company Notice M.
ｇｊ’、 ２ ！１（ａ）＋ （ｂ）＋ （ｃ）は本発
明の詳細な説明するたド２においでｔｌｉ生する光パル
スはカプラ３をＥｉ？由して光ファイバ４に送出される
。このｔか陰ｔて光ファイバ４からフレネル反射して来
る光はアバランシェ・フォト・ダイオード５．アンプ（
ｊ。gj', 2! 1(a)+(b)+(c) is a detailed explanation of the present invention. In step 2, the light pulse generated at tli moves the coupler 3 to Ei? The signal is transmitted to the optical fiber 4 through the optical fiber 4. The light that is Fresnel-reflected from the optical fiber 4 is sent to an avalanche photodiode 5. Amplifier(
j.
Ａ／Ｉ）変Ｊ！２！嵜ニア、加算器８を杼由し、雑音等
を除去され、コード化され、処理部９で処理されて第２
図（ａ）のような受信波形が表示部１２に見られる。A/I) Weird J! 2! After passing through the adder 8, noise etc. are removed, coded, and processed in the processing section 9, and the second
A received waveform as shown in FIG.
令弟１図に示すようｔ／Ｃ，Ｉモリ−１０を段１？？ｔ
、、上記の受イハ゛波形を過去のデータとし°Ｃ記憶し
ておき、後日同じ光ファイバに対して同一の測定を繰シ
返して得られた第２図（ｂ）に示す現在のデータと対比
して、光ファイバ・ケーブルの損失、スプライス損失に
ついて比較演算を演算部１１で行ない、表示部１２で表
示する。この結果を第２０（ｃ）のように、経時変化の
無かったケーブル１は横軸に平行な線で表示し、スプラ
イス点は垂ｉαな線＋表示し、線路損失の変化の有った
ケーブル■はその変化に対応しで傾斜するルーで表示し
、且つ経時変化に閂する各種のデータを表示することが
可能である。As shown in the younger brother 1 diagram, t/C, I moly-10 is stage 1? ? t
,, The above received waveform is stored as past data in °C, and compared with the current data shown in Fig. 2 (b) obtained by repeating the same measurement on the same optical fiber at a later date. Comparison calculations are then performed on the loss of the optical fiber cable and the splice loss in the arithmetic unit 11, and the results are displayed on the display unit 12. As shown in Section 20(c), cable 1 with no change over time is indicated by a line parallel to the horizontal axis, the splice point is indicated by a vertical iα line +, and cables with a change in line loss are indicated by a line parallel to the horizontal axis. (2) is displayed with a slope that corresponds to the change, and it is possible to display various data that correspond to the change over time.
このように、ロケータ内に比較演算機能を付与するとと
により、ロケータ内で受信波形の経時変化即ち光ファイ
バの特性変化を極めて明瞭な形で表ＴＪ７することが出
来る。In this way, by providing the locator with a comparison calculation function, it is possible to clearly display the change in the received waveform over time, that is, the change in the characteristics of the optical fiber, in the locator.
（ｆ） 発明の効果
本発明によれば、光ファイバ・ケーブルに関する経時変
化のデータを光ファイバ・ロケータ装置内で処理２表示
することが出来るという大きい効果がある。(f) Effects of the Invention According to the present invention, there is a great effect that data on changes over time regarding optical fiber cables can be processed and displayed within the optical fiber locator device.
ｆｆ１１図ｔｅ１本発明の一実施例を示す光ファイバ・
ロケータの構成図で、１はクロック部、２はレーザ発信
器、３はカプラ、４は光ファイバ・ケーブル、５はアバ
ランシェ・フォト・ダイオード、６はアンプ、７はＡ／
Ｉ’）変換器、８は加９））汁、９は処理部、１０はメ
モ！ｊ−２１１は演算部、１２は表示部である。第２図
は本発明の詳細な説明するだめの図で、（ａ）、（ｂ）
ｔ （ｃ）は夫々本発明にょる過去のデータ、現在のデ
ータ、比較処理後のデータを示す〇ff11Figure te1 Optical fiber showing an embodiment of the present invention.
In the block diagram of the locator, 1 is a clock section, 2 is a laser oscillator, 3 is a coupler, 4 is an optical fiber cable, 5 is an avalanche photodiode, 6 is an amplifier, and 7 is an A/
I') converter, 8 is addition 9)) juice, 9 is processing section, 10 is memo! j-211 is an arithmetic unit, and 12 is a display unit. FIG. 2 is a detailed explanation diagram of the present invention, (a), (b)
t (c) indicates past data, current data, and data after comparison processing according to the present invention, respectively〇
Claims (1)
記元ファイバーケーブルに関する一〇去に実施した測定
データを装置の内部、′−！たけ外部に記憶する機能を
持ち、且つ前記の記憶データと新しく測定してイ（ｔら
れたデータとを比較することによりｃ時変化に＋３’、
１するデータの表示機能を持つととを特徴とする光ファ
イバ・ロケータ０In a communication line that uses optical fiber cables, the measurement data from 10 days ago on the original fiber cable is stored inside the equipment, ′-! It has the function of storing data externally, and by comparing the previously stored data with newly measured data, the change in time can be +3',
1 Optical fiber locator 0 characterized by having a data display function
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17198882A JPS5960338A (en) | 1982-09-30 | 1982-09-30 | Optical fiber locator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17198882A JPS5960338A (en) | 1982-09-30 | 1982-09-30 | Optical fiber locator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5960338A true JPS5960338A (en) | 1984-04-06 |
Family
ID=15933446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17198882A Pending JPS5960338A (en) | 1982-09-30 | 1982-09-30 | Optical fiber locator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5960338A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0407010A2 (en) * | 1989-05-05 | 1991-01-09 | Tektronix, Inc. | Detection of splices in an optical fiber |
| EP0407009A2 (en) * | 1989-05-05 | 1991-01-09 | Tektronix, Inc. | Estimation of fiber loss and return signal power |
| JPH0422836A (en) * | 1990-05-18 | 1992-01-27 | Kokusai Denshin Denwa Co Ltd <Kdd> | Faulty point measuring method by pulse echo |
| JPH04258735A (en) * | 1991-02-12 | 1992-09-14 | Nippon Telegr & Teleph Corp <Ntt> | Rupture detecting method for optical fiber |
| KR20030089873A (en) * | 2002-05-20 | 2003-11-28 | 한국건설기술연구원 | Otdr measurement system for landslides protection |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52115611A (en) * | 1976-03-24 | 1977-09-28 | Toshiba Corp | Trouble point marker |
-
1982
- 1982-09-30 JP JP17198882A patent/JPS5960338A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52115611A (en) * | 1976-03-24 | 1977-09-28 | Toshiba Corp | Trouble point marker |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0407010A2 (en) * | 1989-05-05 | 1991-01-09 | Tektronix, Inc. | Detection of splices in an optical fiber |
| EP0407009A2 (en) * | 1989-05-05 | 1991-01-09 | Tektronix, Inc. | Estimation of fiber loss and return signal power |
| JPH0422836A (en) * | 1990-05-18 | 1992-01-27 | Kokusai Denshin Denwa Co Ltd <Kdd> | Faulty point measuring method by pulse echo |
| JPH04258735A (en) * | 1991-02-12 | 1992-09-14 | Nippon Telegr & Teleph Corp <Ntt> | Rupture detecting method for optical fiber |
| KR20030089873A (en) * | 2002-05-20 | 2003-11-28 | 한국건설기술연구원 | Otdr measurement system for landslides protection |
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