JPH04104553U - Optical fiber proof test equipment - Google Patents

Abstract

(57) [Summary] [Purpose] [Structure] In a proof test device that continuously runs an optical fiber while applying a predetermined amount of tension to detect and remove defective parts; an OTDR detector is installed at one end of the optical fiber. Alternatively, one end of the optical fiber is connected to a light source and the other end is connected to a photodetector. [Effect] The breakage occurs only in the glass part inside the optical fiber.
Since the coating is intact, the optical fiber itself will not break, and therefore defects that could not be detected in the past can be detected and removed. Therefore, defective optical fibers are not sent to the next process.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to an optical fiber proof test device.

0002

[Conventional technology]

FIG. 3 schematically shows a proof test device. The optical fiber 14 wound around the delivery bobbin 12 is pulled out by the belt wrap 16. , further pulled by the belt wrap 24 via the pulley 18, dancer 20, and pulley 22. , and wind it onto the winding bobbin 26. Meanwhile, an upward force is applied to the dancer 20 using the lever 28 and the weight 30 as shown in the figure. Then, a predetermined tension is applied to the optical fiber 14. 32 surrounded by a dashed line is the test part It's a minute. At that time, the optical fiber 14 having the low intensity portion is cut. Therefore, the lack Faulty optical fibers are prevented from proceeding to the next step.

0003

[Problem that the idea aims to solve]

However, when tension was applied to the optical fiber, the glass part of the optical fiber began to break. Even if the resin coating is broken, the resin coating may not be broken. In such cases, the optical fiber It is wound up as it is. As a result, defective optical fibers are sent to the next process. It becomes.

0004

[Means to solve the problem]

An OTDR detector is connected to one end of the fiber in the proof test equipment. Alternatively, connect a light source to one end of the optical fiber and a photodetector to the other end. .

[0005]

[Effect]

Even if the coating cannot be cut by the OTDR or photodetector, the inner glass may be damaged. When a break occurs, it can be detected.

[0006]

[Example 1] [Device configuration] In FIG. 1, 12 is a delivery bobbin, 32 is a test part, and 26 is a winding bobbin. It is. One of the delivery bobbin 12 or the take-up bobbin 26, e.g. At step 26, the plate 38 is attached to the stopper 36 that attaches the bobbin to the rotating shaft 34. and fix the connector 40 thereto (the connector 40 is attached to the winding bobbin 26). ). As the connector 40, for example, a simple V-groove type can be used, thereby connecting the optical fiber. An optical fiber cord 50 (prepared separately) is connected to the beginning of winding the fiber 14. A portion of the connector 40 is shown in an enlarged scale in FIG. 41 is the main body, 42 is the V groove It is. Within the V-groove 42, the optical fiber 14 and the optical fiber 52 of the cord 50 are butted together. and press with lid 44. Note that the sheath 54 of the cord 50 is placed in another groove 46 and Press with lid 48. In addition, a known rotary joint 56 is attached to the central axis of the rotary shaft 34, and thereby Then, the optical fiber cord 50 is connected to the optical fiber cord 6 of a known OTDR detector 58. Connect to 0. 62 is a winding machine, and 64 is its driving circuit.

[0007] [Device operation] As before, the optical fiber 14 is sent out from the delivery bobbin 12, and the test section 3 is A proof test is performed in step 2, and the film is wound up with a winding bobbin 26. During this time, the optical fiber 14 is monitored by the OTDR detector 58. optical fiber If an abnormality such as breakage occurs in the glass part 14, the OTDR detector 58 detects it. A stop signal is output to the drive circuit 64, and the winding machine 62 is stopped. Tess at the same time The belt wraps 16, 24 in the top portion 32 are also stopped. Then, defective parts of the optical fiber 14 are removed.

[0008]

[Example 2] [Device configuration] As shown in FIG. 2, for example, in the delivery bobbin 12, the optical fiber is A connector 40, an optical fiber cord 50, a rotary joint 56, etc. are attached to one end of the fiber 14. and a light source 68 (for example, a laser oscillator) via an optical fiber cord 66. do. Similarly, in the winding bobbin 26, a connector is connected to the other end of the optical fiber 14. 40, fiber optic cord 50, rotary joint 56, and fiber optic cord 70 A photodetector 72 is connected via.

[0009] [Device operation] The optical fiber 14 is sent out from the delivery bobbin 12 and proofed in the test section 32. A test is performed and the product is wound up using the winding bobbin 26. During this time, light from the light source 68 enters the optical fiber 14 and is detected by the photodetector 72. . If an abnormality such as breakage occurs in the glass portion of the optical fiber 14, the photodetector 72 Detecting this, the switch circuit 74 outputs a stop signal to the drive circuit 64, and the winding machine 6 Stop 2. At the same time, the belt wraps 16 and 24 in the test portion 32 are also stopped. . Then, defective parts of the optical fiber 14 are removed.

0010

[Effect of the idea]

1) In the optical fiber proof test equipment, an OTDR is installed at one end of the optical fiber. Since the detector is connected, The breakage occurred only in the glass part inside the optical fiber, and the coating remained intact, making it impossible to It is possible to detect and remove defects that otherwise would not be detected. Therefore, defective optical fibers are not sent to the next process. 2) Also, a light source was connected to one end of the optical fiber, and a photodetector was connected to the other end. The same effect as above can also be achieved.

[0011] 3) The end of the optical fiber wound around the bobbin is fixed to the bobbin together with the connector. Since it is Even if the bobbin rotates at high speed, the optical fiber will not be damaged. 4) There is no mechanical connection between the rotary joint whose position is fixed and the connector which rotates with the bobbin. Since it is connected with a mechanically strong optical fiber cord, it can be rotated while cutting the air. It can withstand external forces that are applied to it.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of Embodiment 1 of this invention.

FIG. 2 is an explanatory diagram of Example 2 of this invention.

FIG. 3 is an explanatory diagram of the prior art.

[Explanation of symbols]

12 Delivery bobbin 14 Optical fiber 16,24 belt wrap 18,22 Pulley 20 Dancer 26 Winding bobbin 28 Lever 30 weight 32 Test part 34 Rotation axis 36 Stopper 38 board 40 connector 42 V groove 44,48 Lid 46 Groove 50, 60, 66, 70 optical fiber cord 52 Optical fiber 54 Coating 56 Rotating joint 58 OTDR detector 62 Winding machine 64 Drive circuit 68 Light source 72 Photodetector 74 Switch circuit

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Shin Saito 1440 Rokusaki, Sakura City, Chiba Prefecture Fujikura Electric Wire Co., Ltd. Inside the company's Sakura factory

Claims (4)

[Scope of utility model registration request] 1. An optical fiber proof test device in which an optical fiber is continuously run while applying a predetermined amount of tension, the optical fiber proof test device having an OTDR detector connected to one end of the optical fiber. . 2. Connecting an optical fiber cord to one end of the optical fiber with a connector, and fixing the connector to a bobbin for winding or sending out the optical fiber,
2. The optical fiber proof test device according to claim 1, wherein the optical fiber cord is connected to an OTDR detector by a rotary joint attached to the rotating shaft of the bobbin. 3. An optical fiber proof test device that continuously runs an optical fiber while applying a predetermined amount of tension, wherein a light source is connected to one end of the optical fiber and a photodetector is connected to the other end. Connected to optical fiber proof test equipment. 4. An optical fiber cord is connected to one end of the optical fiber by a connector, and the connector is fixed to one of the bobbins for winding or sending out the optical fiber, and the optical fiber cord is connected to the bobbin. A light source is connected to the light source by a rotary joint attached to the rotating shaft of the optical fiber; an optical fiber cord is connected to the other end of the optical fiber by a connector, and the connector is connected to the optical fiber cord for winding or feeding out the optical fiber. 4. The optical fiber proof test device according to claim 3, wherein the optical fiber cord is fixed to the other bobbin, and the optical fiber cord is connected to a photodetector by a rotary joint attached to the rotating shaft of the bobbin.