JPH08304232A - How to check the connection status of the optical fiber cable with MT connectors at both ends - Google Patents

Abstract

(57) [Summary] (Modified) [Configuration] The multi-core connector 22 of the analysis code 2 is connected to the multi-core connector 12 at one end of the multi-core optical fiber cord 1 with MT connectors at both ends, and each analyzed. The single-core connectors 23 attached to the ends of the optical fiber core wires 21 are connected to the light source device 4, and the multi-core connector 13 at the other end of the multi-core optical fiber cord 1 has a connector portion and a required number of optical fiber cores. A line structure in which a required number of optical sensors connected by wires and a detection unit such as an LED or a light receiving level detector connected to the optical sensors are inserted into the connector insertion port of the detection device 8 incorporated in the case. Is a method for confirming the core wire connection state by a normal procedure. [Effect] The conventional connection between the multi-core connectors and the connection between the single-core connector and the optical sensor are largely omitted, the work is extremely efficient, and the connection loss automatic measuring device for the multi-core optical fiber cord with connectors at both ends is further improved. By combining with etc., automation of work becomes easy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of confirming a core wire connection state of a multi-fiber optical fiber cable (tape cable) with MT connectors at both ends outdoors.

[0002]

2. Description of the Related Art Recently, as a multi-fiber optical fiber cable (tape fiber), for example, an optical fiber cable with an MT connector at both ends to which an MT connector is attached has been put into practical use in order to reduce connection work outdoors. Although the connectors used here are making progress toward lower loss, lower prices, and higher fiber counts, similar to optical fibers, an automatic switching system is adopted during the transfer work of optical fiber cables to prevent mechanical Mechanically transferable is abbreviated as MT connector because fiber cables can be switched. In order to monitor the connection state of such a multi-core optical fiber cable with an MT connector, conventionally, the method shown in FIG. 4 has been used for confirmation.

[0003]

2. Description of the Related Art The prior art will be described below. In FIG. 4, a portion indicated by B is both ends M of the object to be measured.
This is a multi-core optical fiber cord 1 with a T connector, and multi-core connectors 12 and 13 are attached to both ends of a cord portion 11 of the multi-core optical fiber cord, respectively.
Generally, the multi-core connector 12 and the multi-core connector 13 have the same structure. Further, in the figure, the portion indicated by A is the light source side analysis code 2 and the light source device 4, and the portion indicated by C is the emission side analysis code 3 and O. P. The O.M. sensor connected by the M sensor 5 and the connecting lead 7. P. In the portion A, the light source side analysis code 2 has a connector 22 at one end connected to B, and the cord 21 on the side branched to the multi-fiber optical fiber cord 1 has a connector at each end. 23 are attached and are individually connected to the light source 4. Further, in the portion C, one end of the output side analysis code 3 is connected to the connector 3
The connector 31 is attached to each end of the cord 31 on the side branched to the multi-core optical fiber cord 1 connected to the optical fiber cord 1. P. It can be connected to the M sensor 5 by switching. P. The M sensor 5 is O.M.
P. It is connected to M6 by a lead 7.

In order to carry out a test for confirming the connection state of the core wires with such a structure, first, a signal light is made incident on one core wire of the analysis code 2 from the light source device 4, and the branch code 3 on the light receiving side is made. The single-core connector 33 is sequentially connected to the optical sensor 5, and O.
P. When it is confirmed by the M (optical power meter) 6 that the emitted signal light is received, the cores are the same core, and the incident light and the emitted light are compared with each other, and an abnormality such as a loss of conduction light is detected. If not, it is judged that there is no disconnection and the connection state is good. By using the light source side analysis code 2 of the portion indicated by A and the emission side analysis code 3 indicated by C for such an operation, the number of incident core wires, for example, 1 to 8, and the number of emitted core wires, for example, By comparing with 1 to 8, it is possible to confirm the connection state of both ends of the measuring optical fiber cord 1 in the portion indicated by B. The detailed test procedures are omitted because the specific test procedures are usually performed, but the analysis code of the A part is connected to the light source one by one, and the analysis code of the C part is one by one. ． P. Connected to the M sensor,
It is needless to say that the connection state of the 1 to 8 cores of the object to be measured can be confirmed and the presence or absence of disconnection can also be confirmed by comparing and comparing the number of the incident core wires and the number of the exit core wires.

By the way, the connection between the multi-core connectors 12 and 22 and the connection between the multi-core connectors 13 and 32 in FIG.
For example, as shown in the exploded perspective view of the connector in FIG. 5, the guide pin 10 is laid between the two connectors 13 and 32 and then clamped from both sides by the clamp spring 9. Reference numeral 11 is a tape-shaped optical fiber. This connection work is not easy because it requires the use of a dedicated tool or connection device. Also, when connecting the single-core connector 33 of the analysis code and the optical sensor 5, when using a general commercially available optical sensor, a dedicated adapter is prepared and used, or it is necessary to attach and detach sequentially and it takes a lot of trouble and time. The current situation.

[0006]

In constructing the conventional core wire contrast circuit as described above, the connection between the multi-fiber connectors of the multi-fiber optical fiber code and the analysis code and the single fiber connector and the optical fiber as described above are performed. It takes a lot of time and effort to connect to the sensor, and it takes time and time to repeat the connection and disconnection of each single-core connector and the optical sensor in order to sequentially perform the connection test of the core wires. It is inefficient and efficiency is required.

[0007]

The present invention has been made in order to solve the above problems, and in particular, the portion indicated by C known in the prior art is the output side analysis code 3. Connected to the O. P. M sensor 5, O. P. M6
Instead of individually inserting and connecting the MT connector of the analysis code, the detection means capable of individually detecting the light receiving state by inserting the connector of the analysis code, that is, the line of the code indicating that light is received LE that can be displayed sequentially according to the mind
It is connected to a detecting means such as a D (light emitting diode) or a light receiving level detector, each core wire of the MT connector is connected to one of the sensors, and the connection state is detected by the light receiving state of the measurement optical cable. Is what you are trying to do. That is, the multi-core connector at one end of the multi-core optical fiber cord with MT connectors at both ends is provided with a multi-core connector at one end and a single-core connector at each of the other ends of the cores. Light source device is connected,
The multi-fiber connector at the other end of the multi-fiber optical fiber cord with MT connectors at both ends has a connector part to be coupled with the multi-fiber connector, a required number of optical sensors, and detection for confirming light reception of the optical sensors. A line structure is formed by connecting a detection device that is modularized and is housed in a case. Using this line configuration, the cores of the multi-core optical fiber cord with connectors at both ends are checked and the connection state of the cores is confirmed by the procedure usually performed.

[0008]

When the core wire connection state confirmation test of the multi-core optical fiber cord with the MT connectors at both ends is conducted by using the core wire connection line structure according to the present invention, the multi-core optical fiber cord multi-core connector is found on the signal light receiving side. It eliminates the need for a complicated connection between the conventional analysis code and the multi-core connector, and simply connects the multi-core connector of the multi-core optical fiber code to the insertion port of the connector of the detection device to connect to the connector part of the detection device. Therefore, it is extremely simple, and since optical sensors have already been attached to the respective ends of the required number of optical fiber core wires from the connector portion, there is no need to reconnect when performing the core wire comparison work. Along with the progress of the core wire comparison work, there is no need to replace the single core connector and the optical sensor as in the conventional case. Further, an LED can be attached as a detection unit for detecting the light reception of the optical sensor, or a light reception level detector can be connected as desired, whereby the automation can be facilitated and the efficiency can be greatly improved.

[0009]

1 is a schematic diagram of an embodiment showing a circuit configuration for conducting a core wire connection state confirmation test of a multi-core optical fiber cord with MT connectors at both ends according to the present invention. In the figure, a multi-core optical fiber cord 1 with MT connectors at both ends, which is an object to be tested shown by B (4 in the example of the drawing), an analysis code 2 shown by A, and a light source device 4 are conventional examples. 4 and the same reference numerals are used for the same parts and detailed description will be omitted. Therefore, the outline of the portion indicated by D in FIG.

In FIG. 1, a portion indicated by D is a detecting device 8, which is a multi-fiber connector 1 of a multi-fiber optical fiber cord 1.
Each core wire of the multi-core optical fiber cord 1 can be easily connected to each optical sensor simply by inserting 3 into the connector insertion port shown after the detection device 8. 2 corresponds to the analysis code 3 in the conventional FIG.
An optical sensor (light emitting diode) 83 is connected to each of these terminals by a required number of optical fiber core wires 82. That is, 81 is a multi-fiber MT connector for the multi-fiber connector 13, and the connection for the MT connector is completed simply by inserting it into the insertion port of the detection device 8. The thus assembled one is housed and mounted in the case 84 as shown in FIG. 3, and the multi-fiber connector 13 of the multi-fiber optical fiber cord 1 is inserted into the connector insertion port 85 to directly connect with the connector portion 81. Connected. Reference numeral 86 denotes, for example, an LED as a detection unit, which is connected to the optical sensors 83 inside the case 84. A light receiving level detector or the like may be used instead of the LED. The detection device 8 is configured in this way.

The core connection state of the multi-fiber optical fiber cord 1 at both ends is confirmed by using the above-mentioned line configuration, and the procedure is according to a generally used ordinary method. However, when this work is carried out in sequence, it is not necessary to carry out the manual labor of replacing and connecting the core wires as in the conventional case.

[0012]

According to the present invention, when the core wire connection state of the multi-core optical fiber cord with the MT connectors at both ends is confirmed, the optical sensor is connected to each core wire of the multi-core optical fiber cord. The electrical continuity is confirmed instantly, and it becomes unnecessary to change the connection between the single-core connector and the optical sensor in sequence with the progress of the conventional work, and the troublesome time and time required for these operations are greatly increased. It is omitted, and the work of confirming the core wire connection state is made very efficient. Further, by using the method of the present invention in combination with an automatic connection loss measuring device for a multi-core optical cable with MT connectors at both ends, the core wire connection state (core wire number comparison) which has been manually performed until now is automatically performed. It can be done and is more efficient.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a line configuration for explaining a core wire connection state confirmation method of a multi-core optical fiber cord with MT connectors at both ends according to the present invention.

FIG. 2 is a schematic diagram showing a connection relationship between a multi-core connector and an optical sensor according to the present invention.

FIG. 3 is a schematic external view of a detection device for confirming light reception in the present invention.

FIG. 4 is a schematic diagram of a line configuration for explaining a conventional example of a core wire connection state method of a multi-core optical fiber cord with MT connectors at both ends.

FIG. 5 is an exploded perspective view of a connector.

[Explanation of Codes] 1 Multi-core optical fiber cord with MT connectors at both ends 2, 3 Analysis code 4 Light source device 5 Optical sensor 6 Optical power meter 7 Lead 8 Detection device 9 Clamp spring 10 Guide pin 11 Multi-core optical fiber cord (tape) 12 multi-core connector (of multi-core optical fiber code) 13 multi-core connector (of multi-core optical fiber code) 21, 31 wire cores (of analysis code) 22, 32 (multi-core connector of analysis code) 23, 33 (analysis) Cord) Single-core connector 81 Multi-core connector section 82 Optical fiber core wire 83 Optical sensor 84 Case 86 Detection section

Claims (3)

[Claims] 1. A multicore connector on the incident side of a cable with MT connectors at both ends, which is a measurement object, is connected to one end of an analysis code on the incident side, and a single-core connector at the other end is individually connected to a light source device. One end of the analysis code on the output side is connected to the single-core connector at the other end, respectively. A method for confirming the connection state of an optical fiber cable with MT connectors at both ends, wherein a D sensor is attached, and this is switched and connected to a light receiving detection means to confirm the connection state of the core wire. 2. The method for confirming the connection state of an optical fiber cable with a MT connector at both ends according to claim 1, wherein the light reception detecting means is an LED. 3. The method for confirming the connection state of an optical fiber cable with a double-end MT connector according to claim 1, wherein the received light detecting means is a received light level detector.