JPS63106706A - Fusion splicing device for optical fiber - Google Patents
Fusion splicing device for optical fiberInfo
- Publication number
- JPS63106706A JPS63106706A JP25399186A JP25399186A JPS63106706A JP S63106706 A JPS63106706 A JP S63106706A JP 25399186 A JP25399186 A JP 25399186A JP 25399186 A JP25399186 A JP 25399186A JP S63106706 A JPS63106706 A JP S63106706A
- Authority
- JP
- Japan
- Prior art keywords
- discharge
- voltage
- circuit
- atmospheric pressure
- current
- 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
- 239000013307 optical fiber Substances 0.000 title claims abstract description 16
- 238000007526 fusion splicing Methods 0.000 title claims description 8
- 238000007599 discharging Methods 0.000 abstract 3
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004927 fusion Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
Landscapes
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Description
この発明は、放電電極の間での気中放電により発生した
熱で光ファイバの融着接続を行う装置の改良に関する。The present invention relates to an improvement in an apparatus for fusion splicing optical fibers using heat generated by air discharge between discharge electrodes.
光ファイバを融着接続する賜金、その熱によって光ファ
イバの溶融状態が異なるので、与える熱を一定にするこ
とが重要である。
放電電極の間での気中放電により発生した熱で光ファイ
バの融着接続を行う装置では、放電電力を一定に保てば
光ファイバに与える熱を一定にでき、安定な接続が可能
であるが、従来、放電電極間にながれる電流を検出し、
この電流が一定になるように制御するようにしている。
すなわち、第４図に示すように、バッテリ等の直流電源
１からの直流電圧（例えば１２Ｖ）を一旦ドロッパ回路
２で１０Ｖ程度に電圧低下させた後、チョッパ回路３で
チョッピングして２０ＫＨ２〜１００ＫＨｚの交流に変
換し、これを昇圧回路（例えばｌ・ランス）４により数
千■に昇圧し、放電電極５に送ってこれらの間で気中放
電を生じさせて熱を発生する。そして、このときの放電
電流を抵抗５１の両端に発生する電圧として検出し、ド
ロッパ回路２にフィードバックして、放電電流が一定に
なるようにドロッパ回路２の出力電圧を変化させる。こ
のような従来の融着接続装置は、直流電源１がバッテリ
等であって多少不安定でも安定した放電電流とすること
ができる点に利点がある。Since the melting state of the optical fiber varies depending on the heat used to fusion-splice the optical fiber, it is important to keep the heat applied constant. In devices that fusion splice optical fibers using the heat generated by air discharge between discharge electrodes, if the discharge power is kept constant, the heat given to the optical fiber can be kept constant, making stable connections possible. However, conventionally, the current flowing between the discharge electrodes was detected,
This current is controlled to be constant. That is, as shown in FIG. 4, the DC voltage (for example, 12V) from a DC power source 1 such as a battery is once lowered to about 10V by a dropper circuit 2, and then chopped by a chopper circuit 3 to generate a voltage of 20KH2 to 100KHz. This is converted into alternating current, boosted to several thousand square centimeters by a booster circuit (for example, a lance) 4, and sent to a discharge electrode 5 to cause an air discharge between them and generate heat. Then, the discharge current at this time is detected as a voltage generated across the resistor 51, and is fed back to the dropper circuit 2 to change the output voltage of the dropper circuit 2 so that the discharge current is constant. Such a conventional fusion splicing device has an advantage in that the DC power source 1 is a battery or the like and can provide a stable discharge current even if it is somewhat unstable.
しかし、上記のような従来の定電流制御方式では、気圧
が変化したときに放電電力を安定にできないという問題
がある。
放電電力は放電電極間の電圧と電流との積で表されるの
で、放電電流を一定にしたとしても放電電圧が一定でな
ければ、放電電力は一定にならない。この電極間の電圧
が変化する要因としては、電極間隔の変化、気圧の変化
などがあり、電極間隔は、専用の電極棒を使用すること
により一定に保つことができるが、気圧による電極間電
圧の変化については上記の定電流方式では対処しようが
ない。そして、気圧の変化は、接続作業を平地で行う場
合と山頂などの高所で行う場合とがあることや、天候の
変化によって、避けられるものでない。
従来の定電流方式に基づく融着接続装置において、気圧
が変化したときに放電電力がどのように変化するかを調
べてみると、第５図のような結果が得られた。この図に
示すように、気圧が低くなるにしたがって放電電力が減
少するため、最適な放電融着を維持することができなく
なる。従来の装置においてこれを避けようとすれば、気
圧の変化があったときその都度放電電流の設定値を変更
するほかないわけである。
この発明は、気圧の変化があっても自動的に放電電力を
一定に保つことができ光ファイバを安定に接続できる、
融着接続装置を提供することを目的とする。However, the conventional constant current control method as described above has a problem in that the discharge power cannot be stabilized when the atmospheric pressure changes. Since the discharge power is expressed as the product of the voltage and current between the discharge electrodes, even if the discharge current is constant, unless the discharge voltage is constant, the discharge power will not be constant. Factors that cause the voltage between the electrodes to change include changes in the electrode spacing and changes in atmospheric pressure.The electrode spacing can be kept constant by using a special electrode rod, but the voltage between the electrodes due to atmospheric pressure The constant current method described above cannot deal with changes in . Changes in atmospheric pressure cannot be avoided because the connection work may be performed on a flat surface or at a high place such as a mountain top, or due to changes in the weather. When examining how the discharge power changes when the atmospheric pressure changes in a conventional fusion splicing device based on a constant current method, the results shown in FIG. 5 were obtained. As shown in this figure, as the atmospheric pressure decreases, the discharge power decreases, making it impossible to maintain optimal discharge fusion. To avoid this in conventional devices, the only way to avoid this is to change the set value of the discharge current each time there is a change in atmospheric pressure. This invention automatically maintains the discharge power constant even when atmospheric pressure changes, and allows stable connection of optical fibers.
The purpose of the present invention is to provide a fusion splicing device.
この発明による光ファイバの融着接続装置は、放、電電
径と、該放電電極に高い電圧を与える電源装置と、放電
電流を検出する回路と、気圧を検出する圧力センサーと
、これら検出された放電電流及び気圧に応じて上記電源
装置を制御することにより放電電流を変化させて放電電
力を一定にするフィードバック制御回路とを有する。The optical fiber fusion splicing device according to the present invention includes a discharge electrode, a discharge electrode diameter, a power supply device that applies a high voltage to the discharge electrode, a circuit that detects the discharge current, a pressure sensor that detects the atmospheric pressure, and a circuit that detects the discharge current. It has a feedback control circuit that changes the discharge current and makes the discharge power constant by controlling the power supply device according to the discharge current and the atmospheric pressure.
放電電流を検出し、これによりフィードバック制御を行
って放電電流を一定に制御する際、圧力センサーで気圧
を検出し、この検出された気圧を加味して制御を行って
いるので、気圧の変化に応じて放電電流を変化させて放
電電力を一定にすることができる。When detecting the discharge current and performing feedback control to control the discharge current to a constant level, the pressure sensor detects the atmospheric pressure and takes this detected atmospheric pressure into account when controlling. The discharge current can be changed accordingly to keep the discharge power constant.
第１図において、直流電源１からの直流電圧（例えば１
２■）を一旦ドロッパ回路２で１０■程度に電圧低下さ
せた後、チョッパ回路３でチョッピングして２０ＫＨｚ
〜１００ＫＨｚの交流に変換し、これを昇圧回路（例え
ばトランス）４により数千■に昇圧し、放電電極５に送
ってこれらの間で気中放電を生じさせて熱を発生し、こ
のときの放電電流を抵抗５１の両端に発生する電圧とし
て検出し、ドロッパ回路２にフィードバックして、ドロ
ッパ回路２の出力電圧を変化させるという構成は第４図
と同じである。ここでは、圧力センサー６がさらに備え
られ、これにより検出された気圧がＡ／Ｄ変換器７を介
してＣＰＵ（マイクロプロセッサ）８におくられ、ＣＰ
Ｕ８の出力で基準電圧切換回路９が切り換えられるよう
になっている。この基準電圧は抵抗５１の一端から取り
出した電圧（放電電流に対応）と比較されるためにドロ
ッパ回路２に送られる。このドロッパ回路２は、ここで
は理解が容易になるように原理的にかかれており、直列
トランジスタ２１とエラーアンプ２２とを有し、抵抗５
１の一端から取り出した電圧と基準電圧とをこのエラー
アンプ２２で比較して、その差の出力をトランジスタ２
１のベースに与えて、降下電圧を制御する。基準電圧切
換回路９は、抵抗分圧回路９１とリレー９２とを有し、
このリレー９２の各接点９３をオン、オフすることによ
り分圧比を切り換える。すなわち抵抗分圧回路９１の一
端にはツェナーダイオード２３から得た一定の電圧が加
えられており、この定電圧が抵抗分圧回路９１で分圧さ
れて、基準電圧としてエラーアンプ２２の正側に与えら
れる。
圧力センサー６によって検出された気圧に応じてリレー
９２が動作させられ、エラーアンプ２２に送るべき基準
電圧が切り換えられる。その結果、気圧の変化に応じて
変１ヒした放電電圧の変化量に対応するように降下電圧
が制御されて放電′電流が変１ヒさせられる。この実施
例では、第５図の気圧と放電電力との関係から、気圧Ｘ
（ミリバール）のとき
Ｐ −ｂ ＋ ０．０１８ （１０１３−ｘ ）の式で
定まる放電電流Ｐ（ｍＡ＞が得られるよう制御されてい
る。なお、ｂは接続する光ファイバの種類に応じた放電
電流の基準値で、ここでは１６ｍＡとしたが、ディップ
スイッチなどで設定できるようにしておけば、作業者が
光ファイバの種類に応じてその都度変更できる。
このような構成により、気圧に応じた放電電流制御を行
い、気圧の変化に対する放電電流及び放電電力を測定し
たみたところ、第２図のような結果が得られた。この第
２図から、放電電力が一定になるような放電電流制御が
非常に良好になされていて、高所での接続作業において
も安定な放電電力によって光ファイバを安定に接続でき
ることが分かる。
第３図は他の実施例を示すもので、抵抗５１の一端の電
圧と圧力センサー６からの電圧出力とを掛算回路１０で
掛算した上でドロッパ回路２のエラーアンプ２２にフィ
ードバックしている。この場合、気圧が低下したとする
と、それに応じて圧力センサー６の出力電圧が低くなる
ので、フィードバック量が小さくなり、ドロッパ回路２
の出力電圧が高くなって放電電流が増加させられ、結果
として一定の放電電力となる。この実施例の場合は、第
１図の実施例と比較して、追加部品が少なくて済むこと
が利点である。
【発明の効果］
この発明の光フアイバ融着接続装置によれば、圧力セン
サーで気圧を検出し、この検出された気圧を加味して放
電電流の制御を行っているので、気圧の変化があっても
自動的に放電電力を一定にすることができる。そのため
、天候の変化や高所での作業などにおいても、常に安定
に光ファイバを接続することができる。In FIG. 1, a DC voltage (for example, 1
2■) is once lowered to about 10■ by dropper circuit 2, and then chopped by chopper circuit 3 to 20KHz.
It is converted into an alternating current of ~100KHz, boosted to several thousand square meters by a booster circuit (for example, a transformer) 4, and sent to a discharge electrode 5 to cause an air discharge between them and generate heat. The configuration in which the discharge current is detected as a voltage generated across the resistor 51 and fed back to the dropper circuit 2 to change the output voltage of the dropper circuit 2 is the same as that in FIG. Here, a pressure sensor 6 is further provided, and the atmospheric pressure detected by this is sent to a CPU (microprocessor) 8 via an A/D converter 7.
The reference voltage switching circuit 9 can be switched by the output of U8. This reference voltage is sent to the dropper circuit 2 to be compared with the voltage taken out from one end of the resistor 51 (corresponding to the discharge current). The dropper circuit 2 is shown here in principle for ease of understanding, and includes a series transistor 21 and an error amplifier 22, and a resistor 5.
The error amplifier 22 compares the voltage taken out from one end of the transistor 1 with the reference voltage, and the output of the difference is sent to the transistor 2.
1 to control the voltage drop. The reference voltage switching circuit 9 includes a resistive voltage dividing circuit 91 and a relay 92,
By turning on and off each contact 93 of this relay 92, the voltage division ratio is switched. That is, a constant voltage obtained from the Zener diode 23 is applied to one end of the resistive voltage divider circuit 91, and this constant voltage is divided by the resistive voltage divider circuit 91 and applied to the positive side of the error amplifier 22 as a reference voltage. Given. Relay 92 is operated according to the atmospheric pressure detected by pressure sensor 6, and the reference voltage to be sent to error amplifier 22 is switched. As a result, the voltage drop is controlled to correspond to the amount of change in the discharge voltage that changes in response to changes in atmospheric pressure, and the discharge current is changed. In this example, from the relationship between atmospheric pressure and discharge power in FIG.
(mibars), it is controlled so that a discharge current P (mA>) determined by the formula P - b + 0.018 (1013-x) is obtained. Note that b is the discharge current according to the type of optical fiber to be connected. The current standard value is 16 mA here, but if it can be set using a dip switch, the operator can change it each time depending on the type of optical fiber.With this configuration, the current value can be adjusted according to the atmospheric pressure. When we performed discharge current control and measured the discharge current and discharge power with respect to changes in atmospheric pressure, we obtained the results shown in Figure 2. From this Figure 2, we can see that discharge current control that keeps the discharge power constant It can be seen that the optical fibers can be connected very well with stable discharge power even during connection work at high places. The voltage and the voltage output from the pressure sensor 6 are multiplied by a multiplication circuit 10 and then fed back to the error amplifier 22 of the dropper circuit 2. In this case, if the atmospheric pressure decreases, the output of the pressure sensor 6 is increased accordingly. As the voltage becomes lower, the amount of feedback becomes smaller and the dropper circuit 2
The output voltage becomes higher and the discharge current is increased, resulting in a constant discharge power. This embodiment has the advantage that fewer additional parts are required compared to the embodiment of FIG. [Effects of the Invention] According to the optical fiber fusion splicing device of the present invention, the atmospheric pressure is detected by the pressure sensor, and the discharge current is controlled taking the detected atmospheric pressure into account, so there is no change in the atmospheric pressure. The discharge power can be automatically kept constant. Therefore, optical fibers can always be connected stably, even when the weather changes or when working at heights.
第１図はこの発明の一実施例のブロック図、第２図はこ
の実施例における制御特性の測定結果を表すグラフ、第
３図は他の実施例のブロック図、第４図は従来例のブロ
ック図、第５図は第４図の例における気圧の変化に対す
る放電電力の測定結果を示すグラフである。
１・・・直流電源、２・・・ドロッパ回路、３・・・チ
ョッパ回路、４・・・昇圧回路、５・・・放電電極、６
・・・圧力センサー、７・・・Ａ／Ｄ変換器、８・・・
ＣＰＵ、９・・・基準電圧切換回路、１０・・・掛算回
路。Fig. 1 is a block diagram of one embodiment of the present invention, Fig. 2 is a graph showing the measurement results of control characteristics in this embodiment, Fig. 3 is a block diagram of another embodiment, and Fig. 4 is a graph of the conventional example. The block diagram, FIG. 5, is a graph showing the measurement results of discharge power with respect to changes in atmospheric pressure in the example of FIG. 4. DESCRIPTION OF SYMBOLS 1... DC power supply, 2... Dropper circuit, 3... Chopper circuit, 4... Boost circuit, 5... Discharge electrode, 6
...Pressure sensor, 7...A/D converter, 8...
CPU, 9... reference voltage switching circuit, 10... multiplication circuit.
Claims (1)
装置と、放電電流を検出する回路と、気圧を検出する圧
力センサーと、これら検出された放電電流及び気圧に応
じて上記電源装置を制御することにより放電電流を変化
させて放電電力を一定にするフィードバック制御回路と
を有する光ファイバの融着接続装置。(1) A discharge electrode, a power supply device that applies a high voltage to the discharge electrode, a circuit that detects discharge current, a pressure sensor that detects atmospheric pressure, and the power supply device that operates according to the detected discharge current and atmospheric pressure. An optical fiber fusion splicing device having a feedback control circuit that controls to change the discharge current and keep the discharge power constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25399186A JPS63106706A (en) | 1986-10-24 | 1986-10-24 | Fusion splicing device for optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25399186A JPS63106706A (en) | 1986-10-24 | 1986-10-24 | Fusion splicing device for optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63106706A true JPS63106706A (en) | 1988-05-11 |
| JPH0442643B2 JPH0442643B2 (en) | 1992-07-14 |
Family
ID=17258747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25399186A Granted JPS63106706A (en) | 1986-10-24 | 1986-10-24 | Fusion splicing device for optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63106706A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0273602U (en) * | 1988-11-25 | 1990-06-05 | ||
| JPH02230206A (en) * | 1989-03-03 | 1990-09-12 | Fujikura Ltd | Optical fiber fusion splicing machine |
| US5296679A (en) * | 1992-08-12 | 1994-03-22 | Fujikura Ltd. | Method and apparatus for fusion splicing optical fibers |
| US5572313A (en) * | 1993-11-29 | 1996-11-05 | Telefonaktiebolaget Lm Ericsson | Determination of angular offset between optical fibers having optical, axial asymmetry and alignment and splicing of such fibers |
| US5586211A (en) * | 1994-04-26 | 1996-12-17 | Telefonaktiebolaget Lm Ericsson | Optical fiber organizer and method using same |
| US5638476A (en) * | 1994-03-08 | 1997-06-10 | Telefonaktiebolaget Lm Ericsson | Controlled splicing of optical fibers |
| US6207922B1 (en) | 1994-03-08 | 2001-03-27 | Telefonaktiebolaget Lm Ericsson (Publ) | Electric control for welding optical fibers |
-
1986
- 1986-10-24 JP JP25399186A patent/JPS63106706A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0273602U (en) * | 1988-11-25 | 1990-06-05 | ||
| JPH02230206A (en) * | 1989-03-03 | 1990-09-12 | Fujikura Ltd | Optical fiber fusion splicing machine |
| US5296679A (en) * | 1992-08-12 | 1994-03-22 | Fujikura Ltd. | Method and apparatus for fusion splicing optical fibers |
| US5572313A (en) * | 1993-11-29 | 1996-11-05 | Telefonaktiebolaget Lm Ericsson | Determination of angular offset between optical fibers having optical, axial asymmetry and alignment and splicing of such fibers |
| US5638476A (en) * | 1994-03-08 | 1997-06-10 | Telefonaktiebolaget Lm Ericsson | Controlled splicing of optical fibers |
| US6207922B1 (en) | 1994-03-08 | 2001-03-27 | Telefonaktiebolaget Lm Ericsson (Publ) | Electric control for welding optical fibers |
| US5586211A (en) * | 1994-04-26 | 1996-12-17 | Telefonaktiebolaget Lm Ericsson | Optical fiber organizer and method using same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0442643B2 (en) | 1992-07-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |