JP3338270B2 - Optical fiber line monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an optical fiber line monitoring apparatus for monitoring an optical fiber line in an optical communication system, and more particularly to an optical fiber line monitoring apparatus having a self-diagnosis function.

[0002]

2. Description of the Related Art A technique for monitoring an optical fiber line in an optical communication system is disclosed in, for example, Japanese Patent Application Laid-Open No. 63-1604.
No. 36, OTDR (Optical Time Domai
n Reflectometer) method is widely known. The OTDR method applies a pulse tester, which is a conventional method of detecting a trouble point in a coaxial cable, to optical communication. That is, O
In the TDR method, test light having a narrow pulse width is incident on an optical fiber line, and the test light reflected and propagated at each point in the optical axis direction of the optical fiber line is received at an end on the incident side, and this is timed. The position of the trouble point of the optical fiber is specified by plotting on the axis.

[0003] As a conventional optical fiber line monitoring device using the OTDR method, "JOURNAL OF LIGHTWAVE TECHNOLIO"
GY, VOL. 12, NO. 5, MAY 1994, pp. 717-726 ". This monitoring device includes a plurality of optical branching modules provided at a connection portion of an optical fiber line, and each optical branching module has a built-in optical coupler for inputting and outputting test light to and from the optical fiber line. . From each optical coupler, branch cores are branched, and these branch cores are connected to a core selector. Furthermore, a tester is connected to the core selector via a master-side optical fiber,
The core selector drives the master side optical fiber and the branch core to selectively optically couple. As described above, the optical coupling between the master-side optical fiber and the desired branch core wire allows the test light to enter and exit the optical fiber line via the optical coupler where the branch core wire is branched. it can.

[0004]

By the way, in the conventional optical fiber line monitoring apparatus, when trying to make the test light incident on all the optical fiber lines having a large number of cores, a large number of core selectors and a pulse test are required. It was necessary to have a container. For this reason, when a failure occurs in any device of the monitoring apparatus, it is difficult to specify the failure location, and the number of cores affected by the failure is large.

[0005] It is an object of the present invention to solve such a problem and to provide an optical fiber line monitoring device in which a failure point can be easily specified.

[0006]

In order to solve the above-mentioned problems, an optical fiber line monitoring apparatus according to the present invention comprises a plurality of optical branching modules each having a built-in optical coupler for inputting and outputting test light to and from an optical fiber line. A core selector for selectively optically coupling the branch optical fiber branched from each optical coupler and the master-side optical fiber, and a tester for inputting and outputting test light to and from the master-side optical fiber; In an optical fiber line monitoring device that monitors a fault condition in a fiber line, at least one of a core selector and a tester includes a plurality of detachable package units. A failure detection sensor for detecting a failure state is provided, a communication network connected to the core selector and the tester, and a failure detection sensor connected to the communication network. Further comprising a failure detector that receives the failure detection signal transmitted from the storage unit, and specifies a failed package unit.The failure detector is a database unit that stores past failure cases, and is transmitted from the failure detection sensor. A failure state analysis unit that analyzes a failure state of the package unit based on the failure detection signal and the failure case read from the database unit. When a failure occurs in any of the package units of the monitoring device, the failure detection sensor provided in the package unit at the failure location specifies the failure location and detects the state of the failure.

As described above, the fault location can be specified by the fault detection sensor provided in each package section.
Failure repair is easier. Further, since the failure state can be detected by the failure detection sensor, it is easy to respond to the failure state. For example, the damage due to failure is severe,
When parts need to be replaced, the whole package part may be replaced. As described above, by replacing the package unit, the monitoring device can be quickly restored.

Here, it is preferable that each of the package units includes a display unit for displaying the content of the failure when the failure is detected by the failure detection sensor.

Further, the failure detector may include a failure state inference unit for inferring a failure state of the package unit based on a failure detection signal transmitted from the failure detection sensor.

Further, the optical fiber line monitoring apparatus of the present invention comprises a plurality of optical branching modules each having a built-in optical coupler for inputting / outputting test light to / from the optical fiber line, and a branch core branched from each optical coupler. An optical fiber line monitoring device comprising: a core selector for selectively optically coupling a master side optical fiber; and a tester for inputting and outputting test light to and from the master side optical fiber, and monitoring a fault condition in the optical fiber line. In the device, at least one of the core wire selector and the tester is configured by a plurality of detachable package units, and each package unit is provided with a failure detection sensor that detects a failure state in the package unit, The core selector is
An optical return member that returns the test light emitted from the master-side optical fiber to the master-side optical fiber without entering the optical branching module, and an optical fiber array member that fixes the branch cores branched from each optical coupler in parallel. And the master-side optical fiber is introduced into the optical fiber array member, whereby one of the optical return member and the plurality of branch cores is optically coupled to the master-side optical fiber.

Here, it is preferable that each of the package units includes a display unit for displaying the details of the failure when a failure is detected by the failure detection sensor.

[0012]

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the description, the same elements will be denoted by the same reference symbols, without redundant description. FIG. 1 is a schematic diagram showing a basic configuration of an optical fiber line monitoring device according to an embodiment of the present invention. As shown in FIG. 1, the optical fiber line monitoring device 1 includes a plurality of optical branching modules 10 each having a built-in optical coupler 11 and each of the optical couplers 11.
A core selector 20 for selecting a branch core 12 to be optically coupled to an optical fiber (master side optical fiber) 21 from among the branch cores 12 branched from the optical fiber, and allows test light to enter and exit the optical fiber 21. The apparatus includes a tester 30 and a main controller 40 that controls the core selector 20 and the tester 30. Each of the optical couplers 11 accommodates a part of the optical fiber line 13, and allows the test light to enter and exit the optical fiber line 13.

The core selector 20 has a plurality of V
Grooves are formed in parallel, an optical fiber array member 22 in which a plurality of branch cores 12 are accommodated in each of these V grooves,
An optical switch unit 23 is provided for introducing the optical fiber 21 into the V-groove of the optical fiber arrangement member 22 and selectively optically coupling the branch core 12 and the optical fiber 21. Further, the core selector 20 includes a control unit 24 that controls the optical switch unit 23, and a power supply unit 25 that supplies power to the optical switch unit 23 and the control unit 24.

The tester 30 includes a light source unit 31 for inputting test light to the optical fiber 21, a light receiving unit 34 for receiving test light emitted from the optical fiber 21, and an S / S of an output signal from the light receiving unit 34. And an AVP (averaging processing circuit) 37 for improving N. Further, the tester 30 includes the light source unit 3
1, control section 3 for controlling light receiving section 34 and AVP section 37
8 and a power supply unit 39 for supplying power to the light source unit 31, the light receiving unit 34, and the like. Note that a power receiving panel 50 that supplies power to the power supply unit 25 is provided outside the core wire selector 20. A power distribution panel 60 that supplies power to the power supply unit 39 is provided outside the tester 30.

Here, the light source section 31 includes an LD (laser diode) 32 for emitting test light and a pulse generator 33 for generating a pulse signal. The pulse signal generated by the pulse generator 33 is supplied to the LD 32. The LD 32 drives the pulse signal as a control signal, and causes the LD 32 to emit test light, which is a pulse signal. The light receiving unit 34 receives an test light and converts the test light into an electric signal.
And an amplifier 36 for amplifying an output signal from the APD 35.

Further, the main controller 40 has a monitor 41 for displaying a test result by the tester 30. That is, the output signal from the AVP unit 37 is given to the main controller 40, and the main controller 40 creates a waveform graph of the distance and the optical loss in the optical fiber line 13 based on the output signal. The waveform graph is displayed on the monitor 41.

Each of the components 23, 24,... Of the core selector 20 and the tester 30 is configured as a detachable package part A, and parts can be replaced in units of the package part A. For this reason, when a failure occurs in the optical fiber line monitoring device 1, it is possible to identify the package unit A in which the failure has occurred and replace the components in units of the package unit A. Therefore, the system can be quickly restored. Are provided with failure detection sensors 23a, 24a,... For detecting a failure state inside the package part A, respectively. For this reason, it is possible to easily identify the package section A in which the failure has occurred. The failure detection sensors 23a, 24a,... Are provided with LEDs (display units) 23b, 24b,. .. Can be easily determined based on the lighting state of the LEDs 23b, 24b,.

Failure detection sensor 23a for optical switch unit 23
An example is a limit detection sensor. The limit detection sensor is a sensor that functions when a stroke of the optical switch unit 23 is checked when the power of the core selector 20 is turned on. The stroke check is performed in the sequence of [originating] → [moving to the + side limit] → [moving to the − side limit]. In this sequence, for example, if the + side limit cannot be detected even though the motor is continuously driven, the limit detection sensor determines that there is an abnormality in the drive system.

The failure detection sensor 24a of the control unit 24
An example is an encoder input signal check sensor. The encoder input signal check sensor compares an output signal to the motor with an input signal from an encoder attached to the motor, and checks the optical switch unit 23 or the control unit 2.
4 is a sensor for detecting abnormality. For example, when the output signal and the input signal do not match, the encoder input signal check sensor determines that the optical switch unit 23 has an abnormality. If the output signal itself does not correspond to the drive parameter (movement amount) of the CPU in the control unit, the control unit 24
Is determined by the encoder input signal check sensor.

Next, the relationship between the lighting colors of the LEDs 23b, 24b,... And the state of the device will be described with reference to FIG. First, in the optical switch 23 of the core selector 20, when power is supplied from the power supply unit 25, the LED 23b
Lights green. Then, when the optical switch 23 starts operating under the control of the control unit 24, the LED 23b switches lighting to yellow. Further, when the failure detection sensor 23a detects the failure of the optical switch 23, the LED 23b switches the lighting to red. Next, in the control unit 24 of the core wire selector 20, when power is supplied from the power supply unit 25,
The LED 24b lights up green. Then, the failure of the control unit 24 or the command transmission / reception error is detected by the failure detection sensor 2.
When 4a detects, LED24b switches lighting to red.

Further, in the power supply section 25 of the core selector 20, when power is supplied from the power receiving panel 50, the LED 2
5b turns on green. When the failure detection sensor 25a detects an abnormality in the output voltage of the power supply unit 25, the LED 2
5b switches lighting to red. In the power receiving panel 50, when the power switch is turned on, the LED 50b lights up in green. When the failure detection sensor 50a detects an abnormality in the voltage value due to the reverse wiring, the LED 50b switches the lighting to red. Next, the light source unit 31 of the tester 30
In, when the test light is emitted from the LD 32 at a normal light intensity, the LED 31b turns on green. And L
Abnormal light intensity of test light emitted from D32 or LD
When the failure detection sensor 31a detects an abnormal rise in the temperature of the LED 32, the LED 31b switches lighting to red.

In the light receiving section 34 of the tester 30, an abnormal rise in the temperature of the APD 35 is detected by the failure detection sensor 34.
When a is detected, the LED 34b lights red. Further, in the AVR unit 37 of the tester 30, when the failure detection sensor 37a detects an abnormality in the averaging process, the LED 37
b lights red. Furthermore, in the control unit 38 of the tester 30, when the failure detection sensor 38a detects an abnormality of the memory check, the LED 38b lights up in red.

Next, in the power supply section 39 of the tester 30, when power is supplied from the distribution board 60, the LED 39 b
Lights green. When the failure detection sensor 39a detects an abnormality in the output voltage of the power supply unit 39, the LED 39b
Switches the lighting to red. In the distribution board 60, when the power switch is turned on, the LED 60b lights up in green. When the failure detection sensor 60a detects an abnormality in the voltage value due to the reverse wiring, the LED 60b switches the lighting to red.

Next, a main controller (fault detector) 40,
Components 23 and 2 of core selection device 20 and tester 30
The communication function with 4,. As described above, when a failure occurs, the optical fiber line monitoring device 1 turns on the LED of the failure location in red to specify the failure location. However, the main control device 40 and the components 23 and 24 ,
.. Can be transmitted and received to specify the failure location. That is, the main controller 40 and each component 2
... are communication cables (communication networks)
The main controller 40 is connected to each component 2
The status confirmation command can be transmitted to 3, 24,. Each of the components 23, 24,... Can return an answer command corresponding to the status confirmation command to the main control device 40.

FIG. 3 shows examples of these commands. FIG.
As shown in the figure, the format of the status confirmation command is “CCC_
00xx, zzz ”. The format of the answer command is“ ACC — 00xx, zzz, a, bbb ”.
bb, ccc, ddddddd, eeeee, where "xx" describes a device number, "zzzz" describes a package number, and "a" describes a manufacturer identification number. , "Bbbbbb" describe the serial number, "ccc" describes the error information data, "dddddd" describes the number of operations, and "eeee" describes the unit mounted state. Data is described.

For example, the optical switch unit 2 of the core selector 20
3, a status confirmation command is transmitted from the main control device 40 to the main control device 40.
When the answer command is returned from the optical switch 3, the device number of the optical fiber selector 20 is "02", the package number of the optical switch unit 23 is "0001", the maker identification number of the optical switch unit 23 is "3", and the optical switch is The serial number of the unit 23 is “00101”, the error information data of the optical switch unit 23 is “000”, and the number of operations of the optical switch unit 23 is 1020.
Assuming that the package mounting state data is “0003”, the state confirmation command and the answer command are as follows, respectively.

The status confirmation command “CCC_0002, 0101” The answer command “ACC_0002, 0101, 3,
Then, main controller 40 analyzes the received answer command, and displays the analysis result on monitor 41.

Next, a specific configuration example of the optical fiber line monitoring apparatus according to the present embodiment will be described with reference to the block diagram of FIG. As shown in FIG. 4, the optical fiber line monitoring apparatus 2 includes a plurality of optical component mounting racks B and a test device installation rack C. The optical component mounting frame B selectively connects the plurality of optical branching modules 10 for inputting and outputting the test light to and from the optical fiber line 13, and the branch core 12 and the optical fiber 21 branched from the optical branching module 10. And a core selector 20 for optically coupling the optical fiber with the optical fiber.

The test apparatus installation rack C is an optical fiber 2
A plurality of test devices 30 for inputting and outputting test light to and from the test device 6;
An optical component mounting selector 70 for selectively optically coupling the optical fiber 21 and the optical fiber 26 extending from the plurality of optical component mounting frames B, a core wire selector 20, a tester 30, and an optical component mounting frame A main controller 40 for controlling the selector 70. Here, the optical component mounting frame selector 70 is a core wire selector 2
0 has almost the same configuration. That is, the optical component mounting frame selector 70 includes an optical fiber arraying member 71 in which a plurality of optical fibers 21 extending from each optical component mounting frame B are arranged in parallel, and an optical fiber An optical switch unit 72 for introducing the optical fiber 26 and selectively optically coupling the optical fiber 21 and the optical fiber 26 is provided.

The optical component mounting rack selector 70 also includes a control unit and a power supply unit (not shown), like the core wire selector 20. The optical switch unit 72, the control unit, and the power supply unit are configured as a detachable package unit.
As a result, when a failure occurs in the optical component mounting frame selector 70, it can be replaced for each component in the optical component mounting frame selector 70.

Further, a workstation 80 is connected to the main controller 40 via a communication line. Therefore, the optical fiber line monitoring apparatus 2 can be remotely controlled using the workstation 80.

Optical fiber array member 2 of core wire selecting device 20
2, and an optical return member D is disposed on the optical fiber array member 71 of the optical component mounting frame selector 70, respectively. The optical return member D is composed of one optical fiber cord U
The optical fiber cord is housed in two V-grooves of the optical fiber arrangement members 22 and 71. Then, both ends of the optical fiber cord and the optical fibers 21 and 26 can be optically coupled by the switching operation of the optical switch units 23 and 72.

As a result, as shown in FIG. 5, when the optical fiber 26 and the optical return member D are optically coupled, the test light incident on the optical return member D from the optical fiber 26 is transmitted to the optical fiber selector. The light can be returned to the optical fiber 26 again without being incident on the optical fiber 26. Thus, the tester 30
By reciprocating the test light between the optical component mounting frame selector 70 and the optical component mounting frame selector 70, the disconnection inspection of the optical fiber 26 can be performed. When the optical fiber 21 and the optical return member D are optically coupled as shown in FIG.
The test light incident on the optical return member D from No. 1 is again incident on the optical fiber 2 without being incident on the optical branching module 10.
Can be returned to 1. In this way, by reciprocating the test light between the tester 30 and the core selector 20, the disconnection inspection of the optical fiber 21 can be performed.

The optical fiber line monitoring device 2 shown in FIG.
It has a function of detecting inundation of the optical fiber line 13. That is, the optical fiber line 13 has a built-in water sensor fiber 90 for detecting water, and the water sensor module 90 is fixed to the water sensor fiber 90 at predetermined intervals. The immersion detection module 91 functions to bend the immersion sensor fiber 90 when flooded. Further, one end of the immersion sensor fiber 90 is connected to the core selector 20, and the core selector 20
The immersion sensor fiber 90 and the optical fiber 21 are optically coupled to each other, so that the test light can be input to and output from the immersion sensor fiber 90. As a result, the inundation detection module 9
When 1 is flooded and the immersion sensor fiber 90 is bent, the backscattered light intensity of the test light propagating through the immersion sensor fiber 90 deteriorates. By measuring the deterioration of the backscattered light intensity of the test light due to the bending loss with the tester 30, it is possible to detect the inundation of the optical fiber line 13.

As shown in FIG.
1 is provided with a rectangular parallelepiped plastic case 91a having an open upper surface, and a fiber through hole 91b is formed in a pair of opposing side surfaces of the case 91a. The immersion sensor fiber 90 penetrates and is fixed to these fiber through holes 91b. Two threshold plates 91c and 91d are arranged inside the plastic case 91a with the immersion sensor fiber 90 interposed therebetween, and one of the threshold plates 91c has a convex shape. The other threshold plate 91d has a concave shape that engages with the threshold plate 91c. Further, the threshold plates 91c, 91
The space 91d is filled with a water-absorbing material 91e. A plastic lid 91f having a plurality of holes formed on the surface is attached to the upper surface of the case 91a.

Then, as shown in FIG. 8, when the coating of the optical fiber line 13 is broken and the immersion detecting module 91 is flooded, the water absorbing material 91e absorbs moisture and expands.
As a result, the distance between the two threshold plates 91c and 91d is reduced, and the immersion sensor fiber 90 is bent in a U-shape.
Bending loss occurs in the test light. FIG. 9 shows an example of the bending loss of the test light. FIG. 9 is a graph showing the relationship between the transmission loss of the immersion sensor fiber 90 and the immersion time. From this graph, it can be seen that the transmission loss of the immersion sensor fiber 90 has increased until 60 minutes have elapsed since the immersion detection module 91 was submerged. For this reason, the tester 30 can detect that the coating of the optical fiber line 13 has been broken and the flood detection module 91 has been flooded.

Next, the core selector 20 by the main controller 40 is used.
Will be described with reference to the flowcharts of FIGS. FIG. 10 shows a core selector 2
9 is a flowchart illustrating an outline of a fault isolation procedure of 0. First, the main controller 40 transmits a state confirmation command to each of the components 23, 24,... Of the core wire selector 20 (step 100). The main controller 40 monitors the return of the answer command in response to the status confirmation command (step 101). If the answer command is not returned to the main controller 40 after a predetermined time has elapsed, the failure detection sensor 24a , The power supply unit 25 to the control unit 24
It is checked whether or not power is being supplied (step 102).

In this processing, when it is determined that power is not supplied to the control unit 24, the main controller 40 supplies power from the power receiving panel 50 to the power supply unit 25 using the failure detection sensor 25a. Is checked (step 103). Further, in this process, when it is determined that power is not supplied to the power supply unit 25, the main controller 40 checks whether a failure detection alarm is output from the failure detection sensor 25a (step 104). If it is determined in this processing that the failure detection alarm has not been output, the main controller 40 determines that the control unit 24 has failed (step 105). This certification result is displayed on the monitor 41, and the administrator who has checked the display on the monitor 41 exchanges the control unit 24 (step 106).

If it is determined in step 104 that the failure detection alarm has been output, the main controller 40
Determines that the power supply unit 25 has failed (step 1).
07). This certification result is displayed on the monitor 41, and the administrator who has checked the display on the monitor 41 replaces the power supply unit 25 (step 108). Further, when it is determined in step 103 that power is supplied to the power supply unit 25, the main controller 40 checks whether the output of the power receiving board 50 is normal using the failure detection sensor 50a (step 103). 109). Then, in this process, when it is determined that the output of the power receiving board 50 is normal, the main controller 40 determines that the mounting of the wiring cable or the power supply unit 25 is defective (step 110). The result of this certification is displayed on the monitor 41, and the administrator who has checked the display on the monitor 41 checks the cable wiring and the like (step 111).

Further, if it is determined in step 109 that the output of the power receiving panel 50 is not normal, the main controller 40
Checks whether the input of the power receiving board 50 is normal using the failure detection sensor 50a (step 112). In this process, when it is determined that the input of the power receiving panel 50 is normal, the main controller 40 sets the failure detection sensor 50
It is checked whether a failure detection alarm has been output from a (step 113).

Further, if it is determined in this processing that the failure detection alarm has not been output, the main controller 40
Determines that there is a possibility that the fuse has blown (step 114). The result of this certification is displayed on the monitor 41, and the administrator who has checked the display on the monitor 41 checks the fuse. As a result, if it is determined that the fuse is not blown, the manager recognizes that the power receiving panel 50 is out of order (step 115), and replaces the power receiving panel 50 (step 116). If it is determined that the fuse is blown, the administrator recognizes that the fuse is blown (step 117) and replaces the fuse (step 118).

If it is determined in step 113 that the failure detection alarm has been output, the main controller 40
Determines that the wiring of the power receiving board 50 is reversed (step 119). The result of this certification is displayed on the monitor 41, and rewiring is performed by the administrator who has confirmed the display on the monitor 41 (step 120). Further, at step 112,
When it is determined that the input of the power receiving panel 50 is abnormal, the main controller 40 determines that the wiring of the power receiving panel 50 is abnormal (step 121). The result of this certification is displayed on the monitor 41, and by the administrator who has confirmed the display on the monitor 41,
Rewiring is performed (step 122).

If it is determined in step 102 that power is being supplied to the control unit 24, the main controller 4
If it is 0, it is checked whether a failure detection alarm is output from the failure detection sensor 24a (step 123). If it is determined in this process that the failure detection alarm has been output, the main controller 40 determines that the control unit 24 has failed (step 124). This certification result is displayed on the monitor 41, and the control unit 24 is replaced by an administrator who has checked the display on the monitor 41 (step 12).
5).

If it is determined in step 123 that the failure detection alarm has not been output, the main controller 4
If it is 0, it is checked whether a communication abnormality alarm is output from the failure detection sensor 24a (step 126). In this process, when it is determined that the communication abnormality alarm is output, the main controller 40 displays on the monitor 41 that the wiring needs to be replaced. When the administrator confirms this display and replaces the wiring, the main controller 40 checks again whether a communication abnormality alarm has been output from the failure detection sensor 24a (step 127).

In this process, when it is determined that the communication abnormality alarm is no longer output, the main controller 40 determines that the communication cable 42 is abnormal (step 12).
8). The result of this certification is displayed on the monitor 41 and the monitor 4
1 is displayed by the administrator who confirms the display of the communication cable 42.
Are exchanged (step 129). If it is determined in step 127 that the communication abnormality alarm is still being output, the main controller 40 determines that the tester 30 has failed (step 130). The result of the certification is displayed on the monitor 41, and the control unit 38 of the tester 30 is replaced by an administrator who has confirmed the display on the monitor 41 (step 131).

Further, when it is determined in step 126 that the communication abnormality alarm has not been output, the main controller 40 determines that there is no abnormality (step 132). This certification result is displayed on the monitor 41, and the administrator who has checked the display on the monitor 41 restarts the device or notifies the manufacturer (step 133).

Next, when the answer command is returned to the main controller 40 within a predetermined time in step 101, the main controller 40 checks whether the returned answer command is normal (step 134). ). In this processing, when it is determined that the answer command is not normal, the main controller 40 sets the error information data of the answer command to
It is checked whether it is other than "000" (no abnormality) (step 135). In this process, the error information data is “000”
Otherwise, the main controller 40 checks whether there is an error in the status confirmation command transmitted in step 100 (step 136).

In this process, when it is determined that the status check command has an error, the main controller 40 transmits the BCC (Block Check Character) added to the answer command.
) Is analyzed to check whether a communication error has occurred (step 137). Here, the BCC is so-called parity check data added to the answer command to detect a transmission error. And in this process,
If it is determined that a communication error has occurred, the main controller 4
If it is 0, it is checked whether the number of retries of the answer command is within a specified number (step 138). Further, when it is determined in this processing that the number of retries is within the specified number, the main controller 40 determines that the communication function of the control unit 24 is abnormal (step 139). The result of this certification is displayed on the monitor 41, and the control unit 24 is replaced by an administrator who has confirmed the display on the monitor 41 (step 14).
0).

If it is determined in step 138 that the number of retries is greater than the specified number, the main controller 40
Determines that the tester 30 or the communication cable 42 is abnormal (step 141). The result of this certification is
The communication cable 42 and the like are exchanged by the administrator who has displayed on the monitor 41 and confirmed the display on the monitor 41 (step 1).
42).

Further, if it is determined in step 137 that no communication error has occurred, the main controller 40
The error information data of the answer command is analyzed to determine whether a format error has occurred (step 14).
3). If it is determined in this processing that a format error has occurred, the main controller 40 determines that the status confirmation command is abnormal (step 144). This certification result is displayed on the monitor 41, and the administrator who has checked the display on the monitor 41 issues a status confirmation command again (step 145).

Further, when it is determined in step 143 that no format error has occurred, the main controller 40 analyzes the error information data of the answer command, and an error has occurred in the power supply unit 25. Is checked (step 146). In this process, when it is determined that a device abnormality has occurred, the main controller 40 determines that the output of the power supply unit 25 is abnormal (step 147). This certification result is displayed on the monitor 41, and the power supply unit 25 is replaced by an administrator who has checked the display on the monitor 41 (step 148).

If it is determined in step 146 that no device abnormality has occurred, the main controller 40
Analyzes the error information data of the answer command,
The control unit 24 checks whether an apparatus error has occurred (step 1).
49). In this process, when it is determined that the device abnormality has occurred, the main controller 40 determines that the operation of the control unit 24 is abnormal (step 150). This certification result is displayed on the monitor 41, and the administrator who has checked the display on the monitor 41 exchanges the control unit 24 (step 1).
51).

If it is determined in step 149 that no device abnormality has occurred, the main controller 40
Analyzes the error information data of the answer command,
It is checked whether a device abnormality has occurred in the optical switch unit 23 (step 152). In this process, when it is determined that the device abnormality has occurred, the main controller 40 determines that the operation of the optical switch unit 23 is abnormal (step 153). The result of the certification is displayed on the monitor 41, and the administrator who has checked the display on the monitor 41 exchanges the optical switch unit 23 (step 154).

Further, when it is determined in step 136 that there is no error in the status confirmation command, and when it is determined in step 152 that no device abnormality has occurred, the main controller 40 determines that there is no abnormality. (Step 155). This certification result is displayed on the monitor 41, and the administrator who checks the display on the monitor 41 restarts the device or notifies the manufacturer (step 15).
6).

If it is determined in step 135 that the error information data is "000", the main controller 4
If it is 0, it is checked whether a communication abnormality alarm is output from the failure detection sensor 24a (step 157). In this process, when it is determined that the communication abnormality alarm is output, the main controller 40 displays on the monitor 41 that the wiring needs to be replaced. When the administrator confirms this display and replaces the wiring, the main controller 40 checks again whether a communication abnormality alarm is output from the failure detection sensor 24a (step 158).

In this processing, when it is determined that the communication abnormality alarm is no longer output, the main controller 40 determines that the communication cable 42 is abnormal (step 15).
9). The result of this certification is displayed on the monitor 41 and the monitor 4
1 is displayed by the administrator who confirms the display of the communication cable 42.
Are exchanged (step 160). If it is determined in step 158 that the communication abnormality alarm is still output, the main controller 40 determines that the tester 30 has failed (step 161). The result of this certification is displayed on the monitor 41, and the administrator who has checked the display on the monitor 41 replaces the control unit 38 of the tester 30 (step 162).

Further, when it is determined in step 157 that the communication abnormality alarm has not been output, the main controller 40 determines that there is no abnormality (step 163). The result of the certification is displayed on the monitor 41, and the administrator who has checked the display on the monitor 41 restarts the apparatus or notifies the manufacturer (step 164).

Next, when it is determined in step 134 that the answer command is normal, the test light emitted from the light source section 31 is transmitted to the main controller 40 via the light receiving section 34 and the AVP section 37. Check if you have returned to (Step 1
65). In this process, when it is determined that the test light has not returned to the main controller 40, the main controller 40 checks whether the light output of the light source unit 31 is normal using the failure detection sensor 31a ( Step 166). Then, in this process, when it is determined that the light output of the light source unit 31 is abnormal, the main controller 40 determines that the light source unit 31 has failed (step 167). This certification result is displayed on the monitor 41, and the light source unit 31 is replaced by an administrator who has checked the display on the monitor 41 (step 16).
8).

If it is determined in step 166 that the light output of the light source section 31 is normal, the optical component mounting rack selector 70 is operated to operate the optical return member D and the optical fiber 2.
6 is optically coupled (step 169). Then, the test light reciprocating in the optical fiber 26 is inspected (step 1).
70), when the light intensity of the test light decreases, the main controller 40 determines that the optical fiber 26 is abnormal (step 171). This certification result is displayed on the monitor 41,
The replacement of the optical fiber 26 and the like are performed by the administrator who has confirmed the display on the monitor 41 (step 172).

Next, the optical switch unit 72 of the optical component mounting frame selector 70 is operated to select an arbitrary optical component mounting frame B (step 173). Then, the optical fiber selector 21 is optically coupled by operating the core wire selector 20 (step 174). Further, the test light reciprocating in the optical fiber 21 is inspected (step 175), and when the light intensity of the test light decreases, the main controller 40 performs the same inspection on the other optical component mounting racks B. Do (Step 1
76). When the conduction of the optical fiber 21 connected to the optical component mounting frame B is normal, the main controller 40
Inspects the continuity of the optical fiber 21 between the optical component mounting racks B (step 177).

In this inspection, if the continuity of the optical fiber 21 between the optical component mounting racks B is normal, the main controller 40
Determines that the core wire selector 20 is abnormal (step 178). The result of the certification is displayed on the monitor 41, and the administrator who checks the display on the monitor 41 replaces the optical switch unit 23 (step 179). Further, in the inspection at step 117, when the conduction of the optical fibers 21 between the optical component mounting racks B is not normal, the main controller 40 determines that the optical fibers 21 between the optical component mounting racks B are defective. (Step 180). The result of this certification is displayed on the monitor 41, and by the administrator who has confirmed the display on the monitor 41,
The exchange of the optical fiber 21 between the optical component mounting racks B and the like are performed (step 181).

Further, in step 176, when the conduction of the optical fiber 21 connected to the optical component mounting frame B is not normal, the main controller 40 determines that the optical component mounting frame selector 70 is abnormal ( Step 182). The result of the certification is displayed on the monitor 41, and the administrator who checks the display on the monitor 41 allows the administrator to confirm the optical fiber 72 of the optical component mounting frame selector 70.
Are exchanged (step 183).

Next, the optical fiber selector 21 is disconnected from the optical return member 23 by operating the optical fiber selector 20, and
The optical fiber 21 is optically coupled to an arbitrary branch core 12 (step 184). Then, test light is incident on the optical fiber line 13, and it is checked whether the test light returns to the tester 30 (step 185). If the test light does not return to the tester 30 as a result of this inspection, the main controller 40 determines that the branch core 12 is defective (step 186). The result of the certification is displayed on the monitor 41, and the administrator who has checked the display on the monitor 41 replaces the optical fiber 23 of the core selector 20 (step 187).

Further, when the test light returns to the tester 30 in step 185, the main controller 40 checks whether the branch core 12 is normally connected to the branch module 10 (step 188). In this process, branch core 1
If it is determined that the branch module 2 is normally connected to the branch module 10, the main controller 40 determines that the branch module 10 is abnormal (step 189). The result of the certification is displayed on the monitor 41, and the branch module 10 is replaced by an administrator who has confirmed the display on the monitor 41 (step 190). If it is determined in step 188 that the branch core 12 is not properly connected to the branch module 10, the main controller 40 determines whether the branch core 12 is
It is determined that the connection is defective (step 191). This certification result is displayed on the monitor 41, and the administrator who has checked the display on the monitor 41 reconnects the branch core wire 12 and restarts the device (step 192).

The internal memory of the main controller 40 and a storage device such as a hard disk (HD) for storing the state of the memory have a correspondence table of each unit (article) / function block / abnormality detection contents shown in FIG. As a database. Then, the contents of the database are updated based on the information obtained according to the procedure shown in step 100 and thereafter. Also, at the time of recovery from the failure state, the failure state is collected based on the same procedure, and the database is updated with the contents of the recovery.

In analyzing the failure state, inference is performed in accordance with the following rules. That is,
(1) The phenomena that can occur from the state before the occurrence of the failure and the phenomena that cannot occur are grouped, and for the phenomena that do not seem to occur, a failure analysis including a higher-level concept is performed. (2) When there are a plurality of causes estimated from the same phenomenon, the analysis is performed in consideration of the past history and the state of other related units. And (1)
Inference having a self-diagnosis function such as (2) is performed by the main controller 40.
Executed in

It should be noted that the present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above embodiment, each of the components of the core selector 20 and each of the components of the tester 30 are divided into the package unit A.
Either one may be sufficient.

In the above embodiment, the inundation of the optical fiber line 13 is detected by using the inundation sensor fiber 90. However, the state of the optical fiber line 13 may be monitored by using another sensor fiber. . For example, an abnormal rise in temperature of the optical fiber line 13 may be detected using a temperature sensor fiber, or an abnormal rise in humidity of the optical fiber line 13 may be detected using a humidity sensor fiber.

[0070]

As described above in detail, the optical fiber line monitoring apparatus according to the present invention comprises a plurality of optical branching modules each having a built-in optical coupler for inputting and outputting test light to and from an optical fiber line, and each optical coupler. A core selector for selectively optically coupling the branch optical fiber branched from the optical fiber and the master-side optical fiber, and a tester for inputting / outputting test light to / from the master-side optical fiber; In an optical fiber line monitoring device that monitors a state, at least one of a core selector and a tester is configured by a plurality of detachable package units, and each package unit detects a failure state in the package unit. And a communication network connected to the core selector and the tester, and connected to the communication network and transmitted from the failure detection sensor. A failure detector that receives the failure detection signal and identifies the failed package unit; the failure detector includes a database unit that stores past failure cases; a failure detection signal transmitted from the failure detection sensor; Based on the failure case read from the database unit,
A failure state analysis unit that analyzes a failure state of the package unit. Therefore, when a failure occurs in any of the package units, the failure detection sensor provided in the package unit at the failure location can specify the failure location and detect the state of the failure.

As described above, the failure location can be specified by the failure detection sensor provided in each package portion.
Failure repair is easier. Further, since the failure state can be detected by the failure detection sensor, it is easy to respond to the failure state. For example, the damage due to failure is severe,
When parts need to be replaced, the whole package part may be replaced. As described above, by replacing the package unit, the monitoring device can be quickly restored.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a basic configuration of an optical fiber line monitoring device according to an embodiment of the present invention.

FIG. 2 is a table showing a relationship between a lighting color of each LED and a device state.

FIG. 3 is a table showing formats of a status confirmation command and an answer command.

FIG. 4 is a block diagram illustrating a specific configuration example of an optical fiber line monitoring device according to the present embodiment.

FIG. 5 is a schematic diagram illustrating an example of optical coupling between an optical fiber and an optical return member.

FIG. 6 is a schematic diagram illustrating an example of optical coupling between an optical fiber and an optical return member.

FIG. 7 is a perspective view illustrating a structure of a waterlogging detection module.

FIG. 8 is a schematic view showing the operation of the immersion detecting module.

FIG. 9 is a graph showing the relationship between the transmission loss of the immersion sensor fiber and the immersion time.

FIG. 10 is a flowchart showing a procedure for isolating a fault in a core selector by the main controller.

FIG. 11 is a flowchart showing a procedure for isolating a fault in the core selector by the main controller.

FIG. 12 is a flowchart showing a procedure for isolating a fault in the core wire selector by the main controller.

DESCRIPTION OF SYMBOLS 1, 2 ... Optical fiber line monitoring device, 10 ... Optical branch module, 11 ... Optical coupler, 12 ... Branch core, 13 ... Optical fiber line, 20 ... Core selector, 21 ... Optical fiber ( Master-side optical fiber), 22 ... optical fiber array member, 23
a, 24a, 25a, 31a, 34a, 37a, 38
a, 39a: Failure detection sensor, 23b, 24b, 25
b, 31b, 34b, 37b, 38b, 39b ... LED
(Display unit), 30: tester, 40: main controller (failure detector), 42: communication cable (communication network), A
... Package part, D ... Light return member. Attorney Yoshiki Hasegawa

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoichi Okamoto 1 Tayacho, Sakae-ku, Yokohama-shi, Kanagawa Prefecture Sumitomo Electric Industries, Ltd. Yokohama Works (72) Inventor Kazumasa Ozawa 1-Tagamachi, Sakae-ku, Yokohama-shi, Kanagawa Sumitomo Electric (72) Inventor Masahiro Hamada 1 in Taya-cho, Sakae-ku, Yokohama-shi, Kanagawa Prefecture Sumitomo Electric Industries, Ltd.Yokohama Works (72) Inventor Naoki Nakao 3-9-1-2 Nishishinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Yasunori Nakabayashi 3-19-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Naoyuki Atobe 3-19 Nishishinjuku, Shinjuku-ku, Tokyo No. 2 Inside of Nippon Telegraph and Telephone Corporation (56) Reference JP-A-2-306362 (JP, A) JP-A-4-241038 (JP, A) JP Hei 5-196543 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) G01M 11/00-11/08

Claims (5)

(57) [Claims] A plurality of optical branching modules each having a built-in optical coupler for inputting and outputting test light to and from an optical fiber line;
A core selector for selectively optically coupling the branch optical fiber branched from each of the optical couplers and the master-side optical fiber, and a tester for inputting and outputting the test light to and from the master-side optical fiber. In the optical fiber line monitoring device that monitors a failure state in the optical fiber line, at least one of the core selector and the tester is configured by a plurality of detachable package units, and each of the package units Is provided with a failure detection sensor for detecting a failure state in the package unit, and a communication network connected to the core selector and the tester.
Network and the communication network,
Receiving the failure detection signal transmitted from the failure detection sensor,
A failure detector for identifying the failed package unit is updated.
The failure detector is provided with a database that stores past failure cases.
And a fault transmitted from the fault detection sensor.
Before the detection signal and read from the database unit
Based on the failure case, the state of the failure of the package unit
An optical fiber line monitoring device, comprising: a failure state analysis unit that analyzes a failure . 2. The optical fiber line monitoring device according to claim 1, wherein each of the package units includes a display unit that displays a failure content when a failure is detected by the failure detection sensor. 3. The failure detector according to claim 1, further comprising: a failure state inferring unit configured to infer a failure state of the package unit based on the failure detection signal transmitted from the failure detection sensor. 2. The optical fiber line monitoring device according to 1. 4. A plurality of optical branching modules having a built-in optical coupler for inputting / outputting test light to / from an optical fiber line;
A core selector for selectively optically coupling the branch optical fiber branched from each of the optical couplers and the master-side optical fiber, and a tester for inputting and outputting the test light to and from the master-side optical fiber. In the optical fiber line monitoring device that monitors a failure state in the optical fiber line, at least one of the core selector and the tester is configured by a plurality of detachable package units, and each of the package units A failure detection sensor for detecting a failure state in the package portion is provided, and the core wire selector emits the master-side optical fiber.
The test light incident on the optical branching module.
Optical return section for returning to the master side optical fiber
Material and the branch cores branched from the optical couplers are arranged in parallel.
An optical fiber array member to be fixed is provided, and the master-side optical fiber is attached to the optical fiber array member.
The light return member and the
Number of the branch cores and the master side optical fiber.
An optical fiber line monitoring device, wherein the optical fiber line is optically coupled to a fiber. 5. The optical fiber line monitoring device according to claim 4, wherein each of the package units includes a display unit that displays a failure content when a failure is detected by the failure detection sensor.