JPH0385033A - Method and device for diagnosing fault of optical communication equipment - Google Patents

Abstract

PURPOSE:To locate a faulty location quickly and easily by connecting an E/O conversion section and an O/E conversion section in an optical communication equipment optically so as to attain fault diagnosis with the optical communication equipment in itself. CONSTITUTION:When an operation switch 7 is closed and a drive section 6 is operated by a control signal from a control section 2, an optical switch 5 is closed and an auxiliary optical fiber 12 between an optical branch device 3 and an optical coupler 4 is active. As soon as the optical switch 5 is closed, the control section 2 forms a serial transmission data, it is converted into a prescribed electric signal and sent to a transmitter 8a of the E/O conversion section 8. Then a preceding signal restoring to a receiver 9b of the O/E conversion section 9 via a prescribed route is inputted to the control section 2 as an electric signal. Then control section 2 applies prescribed conversion processing, compares the obtained reception data with the preceding transmission data to judge the presence of a fault and the result is displayed by a display lamp 14.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an optical communication device used in a two-way optical communication system using two-core optical fibers, and in particular to a method for diagnosing failures in this optical communication device. The present invention relates to a method and apparatus for diagnosing failures in optical communication equipment.

[Conventional technology]

As a type of optical communication, a so-called bidirectional optical communication system has been developed in which optical signals are sent in opposite directions on separate transmission paths using two-core optical fibers. Generally, this bidirectional optical communication system includes a transmission data generator /O0, as shown in FIG. 3, for example.

It has a configuration in which an optical communication device /O1, a received data demodulator (flash relay), etc. are mutually provided, and these are connected by optical fibers /O2°/O3.

By the way, in such a two-way optical communication system,
The optical devices, optical components, or electrical devices that make up these devices often malfunction, resulting in a communication failure. In such a case, it is necessary to find the location of the failure and perform predetermined work to remove the cause of the failure. Therefore, in order to find the location of the failure, for example, as shown in Figure 3, an electric cable is connected between the receiver/O4' and the transmitter/O5', which form part of the optical communication device/O1' on the other side. A fault diagnosis device has been proposed and developed which is connected to the output side of the receiver/O4' and the output side of the transmission data generator/O0.

[Problem to be solved]

However, this failure diagnosis device has problems with the opposing optical communication device/O1. /O1', the failure point is searched for while actually communicating with the optical communication device /O1'. Since it is not easy to identify which optical fiber is /O1' or (2), the location of the failure cannot be easily found.

By the way, in such a system, in particular, the light emitting elements /O6°/O6' and the light receiving elements /O7. It is known that failures occur frequently at /O7', and therefore the quickest way to discover failures is to first diagnose the optical communication device /O1°/O1' side.

Therefore, in view of the above-mentioned circumstances, the present invention provides a method and apparatus for diagnosing a failure of an optical communication device, which makes it possible to independently diagnose the failure of an optical communication device, thereby making it easy to quickly locate the location of the failure. The purpose is to provide the following.

[Means to solve the problem]

That is, in the failure diagnosis method for an optical communication device of the present invention, the operating switch is operated to activate the control section, the drive section is driven to turn on the optical switch, and the serial transmission data created by the control section is sent to the E/R. The optical signal transmitted from the E/O converter is output to the transmitter of the O converter, and is transmitted from the optical splitter to the optical coupler via the optical switch in the on state, and this optical signal is received. The control unit inputs the electric signal output from the /E conversion unit and performs predetermined conversion to create reception data, and the control unit compares and examines the reception data and transmission data to detect failures in the communication device. This is to determine the presence or absence.

Further, the fault diagnosis device of the present invention includes an E/O converter that performs predetermined processing based on the electrical signal output from the transmission data generator and generates the optical signal, and an E/O converter that receives the optical signal of the other party and converts the signal based on the optical signal. The optical communication device includes an O/E converter that outputs an electrical signal, and performs bidirectional communication between a pair of mutually connected optical fibers. An optical splitter and an optical coupler provided on one optical fiber and on the northern optical fiber that connects to the light receiving element of the ○/E converter, and an optical fiber that connects these optical splitters and optical couplers. An optical switch installed in the
A drive unit that operates this optical switch, and a drive unit that controls this drive unit, creates transmission data for diagnosis, converts it into a predetermined electrical signal, and outputs it to the E/O conversion unit, and It is provided with a control for inputting an electric signal output from a converting section, performing a predetermined conversion, obtaining received data, comparing and examining the transmitted data and received data, and displaying the diagnosis result externally.

[Effect]

The failure diagnosis device for an optical communication device of the present invention connects an E/O converter and an O/E converter in the optical communication device with an optical brancher, an optical coupler, and an optical fiber via an optical switch. In addition, a control section is provided that connects each part of the input side of the transmitter and the output side of the receiver, in other words, these are electrically and optically connected, and failure diagnosis can be performed from the control section. The optical communication device converts the data into a predetermined signal and outputs it to the transmitter side, and also inputs the electrical signal from the receiver side, and based on these signals, the optical communication device alone can diagnose the failure and identify the failure location. It can be carried out.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a failure diagnosis device for an optical communication device according to the present invention. It includes couplers 3 and 4, an optical switch 5, a drive section 6, and a one-operation switch 7.

The optical communication device 1 is optically connected to the other party's optical communication device (Flash) via a two-core optical fiber (Flash), and the E/O converter 8 and ○/ The E/O converter 8 includes a transmission data generator (not shown).
When an electrical signal output from a flashlight is input, it undergoes a predetermined conversion and is output as an optical signal to the other party's optical communication device l, and is composed of a transmitter 8 and a light emitting element 8b. There is. When the O/E converter 9 receives an optical signal sent from the optical communication device of the other party, it performs a predetermined conversion and outputs it as an electrical signal to a demodulator (flash). It is composed of a light receiving element 9a and a light receiving element 9b. Note that the optical communication device 1 of this embodiment includes an optical fiber (flash) for optically connecting with the optical communication device of the other party.
One end side of the two is connected by an optical connector IO.

The control unit 2 forms transmission data for fault diagnosis, outputs it as an electrical signal to the transmitter 8a, and sends this signal along a predetermined path within the optical communication device, that is, from the transmitter 8a to the light emitting element 8b to the optical fiber. 11 → Optical splitter 3 → Optical fiber 12 →
Optical switch 5→optical fiber 12→optical coupler 4→optical fiber 13→light receiving element 9a→receiver 9b. Input the electrical signal output from the receiver 9b, and from these signals transmit data and receive. A CPU (Central Processing Unit) is used to compare and examine data. The control unit 2 also has the function of controlling the drive unit 6 that is the drive means of the optical switch 5 and turning on the optical switch 5 only when diagnosing a fault, and the output side is also the input terminal of the drive unit 6. It is connected.

Note that an activation switch 7 is connected to the control unit 2 in order to operate the failure diagnosis device only when diagnosing the failure of the optical communication device 1. Furthermore, an indicator lamp 14 is connected to the control unit 2 of this embodiment in order to display the failure to the outside only when there is a failure within the optical communication device 1.

The optical splitter 3 works together with the optical coupler 4 to input a part of the optical signal outputted from the E/O converter 8 via the optical fiber 10 to the O/E converter 9. and
In order to secure as much of the power of the optical signal sent out from the light emitting element 8b as possible for optical communication, the branching ratio is 1:N.
(N>>1) is used. In other words, this optical branching device 3 minimizes the insertion loss to the auxiliary optical fiber 12 side, which is a line for failure diagnosis, and also prevents an optical signal with excessive power from being input to the light receiving element 9. Only 1/(N+t) of the power is branched to the auxiliary optical fiber 12 side.

On the other hand, the optical coupler 4 combines the optical signal sent out for failure diagnosis with the optical signal outputted for optical communication, contrary to the optical splitter 3, and sends the optical signal to the light receiving element 9 via the optical fiber 11.
A with a predetermined merging ratio l:N' is used.

The optical switch 5 is designed to connect the auxiliary optical fiber 12 between the optical splitter 3 and the optical coupler 4 only when diagnosing a fault. The auxiliary optical fiber 12 is kept in an off state so that no optical signal passes through it.

In this embodiment, the drive 86 mechanically operates the optical switch 5 using electrical means, and turns on/off the switch by electromagnetic force using a solenoid.
is configured to turn off. That is, the drive R6 of this embodiment is actuated by a control signal output from the control section 2, and turns on the optical switch 5 by electromagnetic force.

In this embodiment, the failure diagnosis device is provided inside the optical communication device/O casing, but it may be formed into a unit as shown in FIG. 2, for example. That is, inside the casing of the optical communication device 1 there is an optical branching device 3. Optical coupler4. In addition to incorporating the optical switch 5 and the drive unit 15, a control unit 17, an operating switch 18, an indicator lamp 19, etc. are also housed in a dedicated casing 16 to form a unitized failure diagnosis device, and the connector 20 Both of these may be electrically connected via.

Next, the optical communication device failure diagnosis method of the present invention will be explained using the optical communication device failure diagnosis device of this embodiment.

(2) First, turn on the operating switch 7.

(2) Then, the control signal from the control unit 2 causes the drive unit 6 to
is activated, the optical switch 5 is turned on, and the auxiliary optical fiber 12 between the optical splitter 3 and the optical coupler 4 becomes connected.

(2) At the same time as the optical switch 5 is turned on, the control unit 2 creates serial transmission data, converts it into a predetermined electrical signal, and sends it to the transmitter 8a.

(2) Then, the signal returned to the receiver 9b via a predetermined route is input to the control section 2 as an electrical signal.

The control unit 2 that receives this electrical signal performs a predetermined conversion process, compares and examines the received data with the previously transmitted data, determines whether there is a failure, and displays the results. Displayed by lamp 12.

(2) Once the location of the failure has been identified in this way, appropriate measures such as replacing the failed part with a new one can be taken.

〔effect〕

As explained above, according to the failure diagnosis method for an optical communication device according to the present invention, when diagnosing a failure, the normally open optical switch is closed under the control of the control unit, and the
The /O converter and the O/E converter are optically connected, and within a predetermined path formed by this, predetermined data for fault diagnosis is converted from the control unit into an electrical signal and output, and the path is Based on the signal returned via the optical communication device, it is possible to determine whether there is a failure in the optical communication device only within the optical communication device. That is, according to the method for diagnosing a failure of an optical communication device of the present invention, it is possible to diagnose the presence or absence of a failure in a single optical communication device, so the location of the failure can be identified extremely easily and quickly. can.

[Brief explanation of drawings]

FIG. 1 is a configuration block diagram showing a failure diagnosis device for an optical communication device according to the present invention, FIG. 2 is a configuration block diagram showing a modification of the failure diagnosis device for an optical communication device according to the present invention, and FIG. 3 is a conventional configuration block diagram. 1 is a block diagram showing the configuration of a failure diagnosis device in a two-way optical communication system. ...driver, ...optical switch, ...E/O converter, ...optical splitter, ...optical coupler, ...○/E converter, ...optical communication device , b... Light emitting element, a... Light receiving element.

Claims (1)

[Claims] 1. Operate the operation switch to operate the control section, and the drive section (
6) to turn on the optical switch (5), output the serial transmission data created by the control unit to the transmitter of the E/O converter (8), and transmit it from the E/O converter (8). The optical signal to be transmitted is transmitted from the optical splitter (3) to the optical coupler (4) via the optical switch (5) in the on state, and from the O/E converter (9) that receives this optical signal. A control unit inputs the output electrical signal and performs a predetermined conversion to create reception data, and the control unit compares and examines the reception data and transmission data to determine whether there is a failure in the communication device. A method for diagnosing a failure of an optical communication device. 2. E/O converter (8) that performs predetermined processing and generates an optical signal based on the electrical signal output from the transmission data generator
) and an O/E converter (9) that receives an optical signal from the other party and outputs an electrical signal based on it, and performs bidirectional communication between a pair of mutually connected optical fibers. In the device (1), the one optical fiber is connected to the light emitting element (8b) of the E/O converter (8) and the other optical fiber is connected to the light receiving element (9a) of the O/E converter (9). An optical splitter (3) and an optical coupler (4) provided on the optical fibers of ), a drive section (6) that operates this optical switch (5), and a drive section (6) that controls this drive section (6), creates transmission data for diagnosis, converts it into a predetermined electrical signal, and sends it to the E/O. The electrical signal outputted to the converting section (8) and outputted from the O/E converting section (9) is inputted and subjected to predetermined conversion to obtain received data, and the transmitted data and received data are compared and examined. 1. A failure diagnosis device for an optical communication device, comprising: a control for externally displaying a diagnosis result.