JPS63304212A - Detection of fitting of connector for optical fiber - Google Patents

Abstract

PURPOSE:To check whether the connection of the cores of optical fiber cables is correct or not by providing contact pieces to the prescribed positions from the cores of the optical fiber cables respectively to the two plugs of a connector and providing a detector to detect the contact state of the two plugs. CONSTITUTION:The contact parts 4, 4' having the very small contact surfaces in the prescribed positions C from the optical fiber cores 2, 2' are provided to the plugs 3, 3' of the optical fiber connector for connecting the optical fiber cables 1, 1' by fitting two pieces of the plugs 3, 3' which fix respective one ends of the cores 2, 2', of the two optical fiber cables 1, 1'; in addition, the detector 5 is provided. This detector 5 detects the conduction state between the contact pieces 4 and 4' while the two plugs 3 and 3' are held fitted to each other and makes decision that the fitting state of the plugs is acceptable if there is conduction between the two contact pieces. The contact state between the cores 2, 2' of the optical fiber cables 1, 1' existing in the prescribed positions from the contact parts 4, 4' is thereby decided.

Description

[Detailed Description of the Invention] [Summary] In order to easily inspect the mating state of an optical fiber connector, a contact piece is provided at a predetermined position from the core wire of the optical fiber cable on each of both plugs of the connector, and a The configuration is equipped with a detector that detects the contact state of the two plugs, and the detector detects the contact state of the contact parts of both plugs when they are crimped, and indirectly confirms whether the core wire of the optical fiber cable is connected normally. That's what I do.

[Industrial application field]

The present invention relates to a mating detection method for optical fiber connectors,
In particular, the present invention relates to a mating detection method for optical fiber connectors that allows the mating state of optical fiber connectors to be easily inspected at a connection point.

When laying an optical fiber cable as a temporary signal transmission path outdoors, etc., the cable is installed while connecting the optical fiber cable with an optical fiber connector at both ends, but the longer the distance to be laid, the more the optical connector The number of connection points increases.

In the installation of such long-distance optical fiber cables, 1
If there is a poor connection of the optical fiber connector at any point, it will affect the entire line, such as making it impossible to transmit signals. Therefore, there is a need for a method for quickly confirming whether or not a predetermined connection has been made reliably at each connection point of each optical fiber connector.

[Conventional technology]

FIG. 4 is a diagram showing a conventional method for checking the connection state of an optical fiber connector.

Previously, there was no way to check the connection status of the connector body.
As shown in FIG. 4, one end of an optical fiber cable 19 connected by an optical fiber connector 20 is measured using an optical locator (disconnection detector) 18. This is done by inputting the emitted light from the optical locator 18 into one end of the optical fiber cable 19 and detecting the backscattered light returning in the opposite direction to the traveling light with the detection device of the optical locator 18 at the same end. It is used to measure.

[Problem that the invention seeks to solve]

When optical fiber cables are laid over long distances in outdoor deployment devices, etc., there is no way to determine whether the connection is good or bad in the conventional connector body, which creates problems such as the inability to quickly locate poor connections. was.

In addition, even when measuring one end using an optical locator, the detection equipment for detecting the weak backscattered light and the processing equipment for digital processing are complicated, and not only is expensive equipment required, but it is also difficult to measure the weak backscattered light. For abnormal areas due to
There is a problem that a communication means 21 to notify this is required, resulting in an extensive measurement.

The present invention was created in view of these points, and provides an optical fiber connector stand state detection method that can determine whether the connection state is good or bad for each connection point of an optical fiber connector with a simple configuration. is intended to provide.

[Means for solving problems]

FIG. 1 is a schematic diagram showing the principle of the mating detection method of the optical fiber connector of the present invention.
A predetermined position C from the optical fiber core wires 2, 2' is connected to the plug 3.3' of the optical fiber connector which connects the two optical fiber cables 1.1' by mating the two plugs 3.3'. A contact portion 4,4' having a minute contact surface is provided at the contact portion 4,4', and a detector 5 is provided for detecting the contact state of the contact portion 4,4'.

[Effect]

The detector 5 detects the conduction state between the contact pieces 4 and 4' when both plugs 3 and 3' are mated, and determines that the plug mating state is good if there is continuity between the contact pieces. , it is judged as defective if there is no continuity.

This determines the state of contact between the core wires 2, 2' of the optical fiber cables 1, 1' located at a predetermined position from the contact portion 4.4'.

〔Example〕

FIG. 2 is a schematic diagram of an optical fiber connector plug according to an embodiment of the present invention, and FIG. 3 is a circuit diagram of a connector mating detection method according to an embodiment.

As shown in FIG. 2, in the optical fiber connector, one end of each core wire 2, 2' of two optical fiber cables 1.1' is fixed with a plug 363', and two plugs 3, 3
' and connect the two optical fiber cables 1.1'.
Connect.

In addition, the optical fiber core wire 2.2' is attached to the plug 3.3'.
Contact piece 4.4' having a minute contact surface at a predetermined position C
and the contact piece 4゜4' and the plug ferrule portion A of the optical connector.

Metallic core wires 6, 6' and conductive wires 7, 7' are connected to each of A' as lead wires to the outside, and are connected to the detector 5, respectively.

As shown in FIG. 3, the detector of one embodiment includes AND circuits 8, 9 and 10 for detecting the contact state between contact pieces 4 and 4' and plug ferrule portions A and A';
, 9. A changeover switch 11 that switches the output of 10 to separate the contact state between the contact piece and the plug ferrule part;
It is equipped with a buzzer (BZ) 12 and a display lamp 13 that display the detection results of the ND circuit.

Further, the lead wires 6, 6' of the contact pieces 4, 4' are connected to the red L terminal and red 2 terminal of the detector 5, respectively, and the lead wires 7.7' of the plug ferrule parts 6, 6' are connected to the red L terminal and the red 2 terminal of the detector 5, respectively. Connected to the blue 1 and blue 2 terminals.

If the connectors are now mated properly, the lead wire 6
, 6' and 7.7' are in a conductive state. At this time, the output of the AND circuit 9 becomes rHJ. As a result, the transistor (TR) is turned on, the display lamp 13 lights up, and the buzzer 12 sounds to confirm that the conduction is good.

Note that in order for the output of the AND circuit 9 to be rHJ, both of its inputs must be rHJ. Therefore, AN
If the threshold level of D circuit 9 is -E/2, then
If R1 is considered to be fixed, it is sufficient to set R2≦R1/2. In addition, when R1 and R2 are not electrically connected at the pedestal part, the input of the AND circuit 9 is roPENJ and rHJ.
In order to prevent this from occurring, it is necessary to maintain a negative voltage (-E).

Next, the case where the lead wires 6, 6' or 7,7' are not electrically connected due to incomplete fitting will be explained. If the connector is now incompletely mated, the lead wires 6, 6
', 7, 7', or both are in a non-conducting state. At this time, one or both of the inputs of the AND circuit 9 are r
Since it becomes LJ, the output of the AND circuit 9 becomes rLJ.

As a result, the TR does not operate, the indicator lamp 13 remains off, and the buzzer 12 does not sound, so it can be confirmed that there is no conduction.

By operating the changeover switch 11, it is possible to check whether the lead wires 6, 6' are not conductive, or if the lead wires 7,
7' can be checked to see if it is electrically connected.

That is, when the lead wires 6 and 6' are conductive, when the selector switch 11 is set to the "red" side, both inputs of the AND circuit 8 are "■("), so the output becomes rHJ, and the display lamp The continuity of the lead wires 6, 6' can be confirmed by the lighting of 13 and the sound of the buzzer 12.

In addition, if there is no conduction, the red 1 side is "
It can be determined that the connection of the lead wires 6 and 6' is incomplete.

In addition, when the lead wires 7 and 7 are conductive, when the selector switch 11 is set to the "blue" side, both inputs of the AND circuit 10 are rHJ, so the output is also rHJ, and the indicator lamp 13 is turned on. Continuity of the lead wires 7 and 7' can be confirmed by the sound of the buzzer 12.

In addition, if there is no conduction, the blue 1 side is r due to R1.
LJ, and it can be determined that the connection between the lead lines 7 and 7' is incomplete.

In this way, the contact state between the contact pieces 4 and 4' and the plug ferrule parts 6 and 6' is detected, and when each is in a conductive state, the light at a predetermined position is detected from the contact pieces 4 and 4'. It can be determined that the core wires 2 and 2' of the fiber cable are completely abutted and connected.

〔Effect of the invention〕

Since it is possible to easily determine on the spot whether the mating condition of an optical connector is good or bad, it is possible to significantly reduce the time required to construct an optical fiber line.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the principle of the mating detection method of an optical fiber connector of the present invention, Fig. 2 is a schematic diagram of an optical fiber connector plug according to an embodiment of the present invention, and Fig. 3 is a schematic diagram of an embodiment of the optical fiber connector plug of the present invention. FIG. 4 is a circuit diagram of the connector mating detection method, which shows a conventional method for checking the connection state of an optical fiber connector. In the figure, 1, 1' and 19 are optical fiber cables, 2, 2' are core wires, 3.3' are plugs, 4°4' are contact pieces, 5 are detectors, and 6.6' are metallic core wires (drawers). wire), 7.7' is a conductive wire (lead wire), 8, 9.10 is A
ND circuit, 11 is a changeover switch, 12 is a buzzer (BZ)
, 13 is a display lamp, 18 is an optical locator, 20 is an optical fiber connector, and 21 is a communication means. Kio Moe ts t 7y 4N for half 7t Kanrantsu comparison 7
Formula 1 revision/! Risanebe area Figure 1 Figure 2 1N 70 expressions 7γ I8ko half lid, 1 year old concubine J Shibai [μ! d
Diagram 4

Claims (1)

[Claims] Core wires (2, 2) of two optical fiber cables (1, 1')
two plugs (3, 3) fixed to one end of each
′) to connect the two optical fiber cables, the optical fiber core wires (2, 3′) in the plugs (3, 3′)
A conductive contact piece (4, 4') is provided near the plug 2'), and a detector (5) is provided to detect the conduction state of both contact pieces when both plugs are mated. A mating detection method for an optical fiber connector, characterized in that a joining state of both the fiber core wires is detected.