KR102456413B1 - Apparatus for monitoring optical fiber - Google Patents

Abstract

The present invention provides a body including a first connector connected to an operator terminal and a second connector connected to a subscriber terminal; a coupler included in the body and connected to the first connector and the second connector; and an optical power measuring unit included in the body and connected to the coupler to analyze the magnitude of an input optical signal, , the coupler transmits the downlink optical signal input from the first connector to the second connector, and branches the reflected signal of the downlink optical signal among the optical signals input from the second connector to the optical power measuring unit, respectively. and the optical power measuring unit compares the intensity of the reflected signal of the branched downlink optical signal with a preset reference value to provide an optical path state checking device comprising a connection state determination unit for determining the connection state of the optical cable on the subscriber side, It provides an advantageous effect of determining the status of the subscriber-side terminal without the need to add a separate optical signal.

Description

Optical fiber condition check device {Apparatus for monitoring optical fiber}

The embodiment relates to an optical path state checking device.

FTTH (Fiber To The Home) is a network technology in which an optical cable is directly connected to each home of a subscriber. Specifically, it is a technology that connects from an optical line terminal (OLT) to an optical network unit (ONU) or an optical network terminal (ONT) through an optical splitter with an optical cable.

When a subscriber's contract is terminated or a subscriber is changed, the line connected to the subscriber's ONU or ONT is removed or connected repeatedly. In this case, there is a problem in that it is difficult to check an unused line when connecting to a terminal on the side of a new subscriber.

Therefore, in order to connect the network to the new subscriber, it is necessary to check whether the ONU or ONT of the subscriber is operating.

To this end, in Korean Patent Laid-Open Patent No. 10-2013-0126834 (published on November 21, 2013), as a method of monitoring the network state, a monitoring optical signal (optical pulse) having a specific wavelength is incident on the optical path, and the reflected light A configuration for analyzing the state of the optical path by analyzing the characteristics of the signal is described. However, this configuration has a problem in that the structure of the equipment is complicated and the equipment price is increased because a separate optical signal having a downlink optical signal and an optical wavelength is used.

Republic of Korea Patent Publication No. 10-2013-0126834 (published on November 21, 2013)

Accordingly, the embodiment is intended to solve the above problems, and to provide an optical path state measuring device having a low manufacturing cost with a simple configuration.

The problems to be solved by the embodiment are not limited to the problems mentioned above, and other problems not mentioned here will be clearly understood by those skilled in the art from the following description.

An embodiment for achieving the above object includes a body including a first connector connected to an operator terminal and a second connector connected to a subscriber terminal, and included in the body, the first connector and the second a coupler connected to a connector and an optical power measuring unit included in the body and connected to the coupler to analyze a magnitude of an input optical signal, wherein the coupler transmits the downlink optical signal input from the first connector to the first connector 2 connectors, and branching a reflected signal of a downlink optical signal from among the optical signals input from the second connector and transmitting it to the optical power measuring unit, respectively, and the optical power measuring unit is a reflected signal of the branched downlink optical signal It is possible to provide an optical path state checking device including a connection state determination unit for determining the connection state of the optical cable on the subscriber side by comparing the intensity of the with a preset reference value.

Preferably, it may further include a display unit connected to the connection state determining unit to display the connection state.

Preferably, the first connector and the second connector may be arranged side by side on the same surface of the body.

Preferably, it may further include a wireless transmitter connected to the connection state determination unit to wirelessly transmit information on the connection state.

Preferably, when it is determined that the optical cable on the subscriber side is disconnected based on the optical signal reflected by the connection state determination unit, an interface unit for transmitting information on the connection state to the outside may be further included.

According to the embodiment, by branching the optical signal upward and analyzing the branched optical signal in the optical power measuring unit to determine whether the optical cable is disconnected, the status of the subscriber side terminal can be grasped without the need to add a separate optical signal It provides a beneficial effect that can be

1 is a view showing an optical path state checking device according to a preferred embodiment of the present invention;
2 is a view showing a downward optical signal and an upward optical signal;
3 is a view showing a reflected light signal;
4 is a view showing a display unit;
5 is a view showing a wireless transmitter;
6 is a diagram illustrating an interface unit.

Hereinafter, an embodiment will be described in detail with reference to the accompanying drawings. The objects, specific advantages and novel features of the embodiments will become more apparent from the following detailed description taken in conjunction with the accompanying drawings and preferred embodiments. And the terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and the inventor appropriately defines the concept of the term in order to best describe his invention. Based on the principle that it can be done, it should be interpreted as meaning and concept consistent with the technical idea of the embodiment. And in describing the embodiments, detailed descriptions of related known technologies that may unnecessarily obscure the gist of the present invention will be omitted.

1 is a view showing an optical path state checking device according to a preferred embodiment of the present invention.

Referring to FIG. 1 , the optical path state measuring device according to a preferred embodiment of the present invention includes a body 100 , a coupler 200 , an optical power measuring unit 300 , and a connection state determining unit 400 . and a display unit 500 .

The body 100 includes a coupler 200 , an optical power measuring unit 300 , and a connection state determining unit 400 therein. In addition, the body 100 may include a first connector 110 and a second connector 120 .

2 is a diagram illustrating a downward direction optical signal and an upward optical signal.

1 and 2 , the first connector 110 is connected to the operator-side OLT. The second connector 120 is connected to the subscriber-side ONU or ONT. A coupler 200 is connected between the first connector 110 and the second connector 120 . The downlink optical signal S1 flows to the second connector 120 through the first connector 110 and the coupler 200 . The upward optical signal S2 flows to the first connector 110 through the second connector 120 and the coupler 200 .

Here, “downlink” means the transmission direction of an optical signal from the operator-side terminal to the subscriber-side terminal, and “upstream” means the transmission direction of the optical signal from the subscriber-side terminal to the operator-side terminal.

The first connector 110 and the second connector 120 may be formed on the same surface of the body 100 . This is for the ease of checking the status of the optical fiber.

On the other hand, the body 100 may be implemented with a handle for easy portability by the operator, or a separate fastening member may be provided so as to be fastened to work clothes.

3 is a diagram illustrating a reflected light signal.

The coupler 200 transmits the downlink optical signal S1 input from the first connector 110 to the second connector 120 . Then, the reflected optical signal S3 of the downlink optical signal S1 input to the second connector 120 is branched and transmitted to the connection state determining unit 400 of the optical power measuring unit 300 .

If the optical cable connected to the subscriber's ONU or OLT is cut, the downlink optical signal may be reflected back from the cut surface of the optical cable. The coupler 200 may branch an optical signal in a wavelength band of a downlink optical signal among the received optical signals and send it to the connection state determination unit 400 . On the other hand, the coupler 200 may send the optical signal that is not the optical signal in the wavelength band of the downlink optical signal among the received optical signals to the first connector 110 as it is.

The optical power measuring unit 300 may be connected to the coupler 200 . In addition, the optical power measuring unit 300 may include a connection state determining unit 400 therein.

4 is a diagram illustrating a display unit.

When the downlink optical signal S3 reflected from the coupler 200 is input, the connection state determination unit 400 determines that the optical cable connected to the user-side ONU or OLT is cut, and generates a control signal. As shown in FIG. 4 , the generated control signal is transmitted to the display unit 500 to visually inform the operator that the optical cable is in a cut state.

If the reflected downlink optical signal is not input and the uplink optical signal is not input for a certain period of time, the connection state determination unit 400 determines that the optical cable is not cut, but the ONU or OLT on the subscriber side does not operate to generate a control signal. can The generated control signal may be transmitted to the display unit 500 to visually inform the operator that the subscriber-side ONU or OLT does not operate.

The display unit 500 may be implemented in the body 100 . The display unit 500 is connected to the connection state determination unit 400, and a display window in which characters or designs indicating the connection state are displayed. It may be implemented in the form of a lamp including an LED.

5 is a diagram illustrating a wireless transmitter.

Referring to FIG. 5 , the wireless transmitter 600 may be included in the body 100 by being connected to the connection state determining unit 400 . When it is determined that the optical cable connected to the user-side ONU or OLT is cut, the wireless transmitter 600 may wirelessly transmit a signal containing information about this to an external server.

6 is a diagram illustrating an interface unit.

Referring to FIG. 6 , the interface unit 700 may be included in the body 100 by being connected to the connection state determining unit 400 . The interface unit 700 serves to transmit a signal containing the connection state information received from the connection state determination unit 400 to an external terminal.

As described above, with reference to the accompanying drawings with respect to the optical path state checking device according to one preferred embodiment of the present invention has been described in detail.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes and substitutions are possible within the scope that does not depart from the essential characteristics of the present invention by those of ordinary skill in the art to which the present invention pertains. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are for explaining, not limiting, the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments and the accompanying drawings. . The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: body
110: first connector
120: second connector
200: coupler
300: optical power measuring unit
400: connection state determination unit

Claims (5)

a body including a first connector connected to the operator terminal and a second connector connected to the subscriber terminal;
a coupler included in the body and connected to the first connector and the second connector; and
and an optical power measuring unit included in the body and connected to the coupler to analyze the magnitude of the input optical signal,
The coupler transmits a downlink optical signal input from the first connector to the second connector, transmits an uplink optical signal input from the second connector to the first connector, and the optical signal input from the second connector The reflected signal of the downlink optical signal among the signals is branched and transmitted to the optical power measuring unit, respectively,
The optical power measuring unit includes a connection state determination unit for determining the connection state of the optical cable on the subscriber side by comparing the strength of the reflected signal of the branched downlink optical signal with a preset reference value,
When the reflection signal of the downlink optical signal and the uplink optical signal are not input, the connection state determining unit determines that the optical cable is not cut, and the subscriber terminal (ONT) or the optical communication network unit (ONU) is not operating. A device for determining the state of the optical fiber. The method of claim 1,
The optical path state checking device further comprising a display unit connected to the connection state determination unit to display the connection state. 3. The method of claim 2,
The first connector and the second connector are optical path state checking device disposed side by side on the same surface of the body. 3. The method of claim 2,
The optical path state checking device further comprising a wireless transmitter connected to the connection state determination unit to transmit information about the connection state wirelessly. 3. The method of claim 2,
The optical path state checking device further comprising an interface unit for transmitting information on the connection state to the outside when it is determined that the subscriber-side optical cable is disconnected based on the optical signal reflected by the connection state determining unit.

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