Optical time domain reflectometer for on-line monitoring of optical cable

Abstract

The utility model discloses an optical time domain reflectometer for on-line monitoring of an optical cable, which comprises an instrument shell, an external plate, an instrument test ST female joint and an OTDR emission FC male joint, the instrument test ST female joint and the OTDR emission FC male joint are arranged in the instrument shell, a test port of the instrument test ST female joint is connected with an FC-ST optical fiber adapter, and the instrument test ST female joint and the OTDR emission FC male joint are connected with an optical fiber adapter. An emission port of the OTDR emission FC male connector is connected with an ST-FC optical fiber adapter; according to the optical time domain reflectometer for on-line monitoring of the optical cable, a transmitting port of an optical time domain reflectometer (OTDR) transmitting FC male connector and a testing port of an instrument testing ST female connector in the prior art are replaced by a transmitting port of an ST-FC optical fiber adapter and a testing port of an FC-ST optical fiber adapter, and then the optical time domain reflectometer is fixedly arranged on the outer side end face of an external plate through screws; the transmitting port and the testing port can be replaced on the outer side of the instrument shell, the part for disassembling the instrument shell is omitted, the transmitting end optical fiber and the testing end optical fiber do not need to be connected again, the replacement process is simplified, and the operation process is simpler.

Description

Technical Field

[0001] The utility model relates to the technical field of optical time domain reflectometers, in particular to an optical time domain reflectometer for online monitoring of optical cables. Background Art

[0002] The optical time domain reflectometer is an instrument that analyzes the measurement curve to understand the uniformity, defects, breaks, connector coupling and other properties of optical fibers. It is an indispensable tool in the construction, maintenance and monitoring of optical cables. In the prior art, the ends of the OTDR transmitting FC male connector and the instrument test ST female connector of the traditional optical time domain reflectometer are fixedly installed on the outside of the instrument housing. In daily optical cable testing, the transmitting port of the OTDR transmitting FC male connector has a built-in ceramic core, which is very fragile. Moreover, most of the attenuation of the optical time domain reflectometer is caused by unclean optical fiber end faces, which can seriously cause the optical link to malfunction. That is, the OTDR transmitting FC male connector and the instrument test ST female connector are vulnerable parts of the optical time domain reflectometer.

[0003] However, in the prior art, the OTDR transmitting FC male connector and the instrument test ST female connector of the optical time domain reflectometer are fixedly installed inside the shell by screws. Each time they are replaced, the shell of the optical time domain reflectometer needs to be disassembled again to remove the OTDR transmitting FC male connector and the instrument test ST female connector from the optical fiber for replacement; that is, the replacement process of the transmitting port and the test port of the optical time domain reflectometer in the prior art is relatively complicated. Utility Model Content

[0004] The utility model aims to solve the problem that the replacement process of the emission port and the test port of the optical time domain reflectometer in the prior art is relatively complicated, and proposes an optical time domain reflectometer for online monitoring of optical cables.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An optical time domain reflectometer for online monitoring of optical cables, comprising an instrument housing, an external board, an instrument test ST female connector and an OTDR transmission FC male connector, wherein the external board is fixedly mounted on the outer wall of the instrument housing, and the instrument test ST female connector and the OTDR transmission FC male connector are mounted in the instrument housing;

[0007] The test port of the instrument testing ST female connector is connected to an FC-ST optical fiber adapter, the transmitting port of the OTDR transmitting FC male connector is connected to an ST-FC optical fiber adapter, and the transmitting port of the ST-FC optical fiber adapter and the test port of the FC-ST optical fiber adapter are fixedly mounted on the outside of the external board by screws.

[0008] Preferably, an inner plate is arranged on the inner side of the outer plate, the outer plate and the inner plate are parallel to each other, and the outer plate and the inner plate are fixedly connected by a plurality of fixing rods.

[0009] Preferably, a rectangular frame is fixedly installed between the plurality of fixing rods, and four rubber skins are arranged in the rectangular frame.

[0010] Preferably, the four rubber skins are contacted and connected to each other in sequence, and the ST-FC fiber optic adapter and the FC-ST fiber optic adapter pass through two contact connections of the four rubber skins respectively.

[0011] Preferably, the instrument test ST female connector and the OTDR transmission FC male connector are fixedly mounted on the built-in board.

[0012] Preferably, the head end of the instrument test ST female connector is connected to the transmitting end optical fiber, and the head end of the OTDR transmitting FC male connector is connected to the test end optical fiber.

[0013] Compared with the prior art, the utility model provides an optical time domain reflectometer for online monitoring of optical cables, which has the following beneficial effects:

[0014] 1. The optical time domain reflectometer for online monitoring of optical cables is used to replace the transmitting port of the OTDR transmitting FC male connector and the test port of the instrument testing ST female connector in the prior art through the transmitting port of the ST-FC optical fiber adapter and the test port of the FC-ST optical fiber adapter. Moreover, the ST-FC optical fiber adapter and the FC-ST optical fiber adapter are snap-connected with the transmitting port of the OTDR transmitting FC male connector and the test port of the instrument testing ST female connector in the present application, and then fixed to the outer end face of the external board by screws, so that the ST-FC optical fiber adapter and the FC-ST optical fiber adapter can be replaced on the outside of the instrument housing, that is, the transmitting port and the test port can be replaced on the outside of the instrument housing, eliminating the need to disassemble the instrument housing, and there is no need to reconnect the transmitting end optical fiber and the test end optical fiber, which simplifies the replacement process of the transmitting port and the test port of the optical time domain reflectometer, and the operation process is simpler.

[0015] 2. The optical time domain reflectometer for online monitoring of optical cables can be used to automatically seal the launch port of the OTDR launch FC male connector or the front side of the test port of the instrument test ST female connector when the ST-FC optical fiber adapter or FC-ST optical fiber adapter is pulled out through the recoverable elasticity of the four rubber skins, which can effectively prevent dust from contaminating the launch port of the OTDR launch FC male connector or the test port of the instrument test ST female connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a schematic diagram of the structure of an optical time domain reflectometer for online monitoring of optical cables proposed by the utility model;

[0017] Figure 2 The utility model is a partial cross-sectional view of an optical time domain reflectometer for online monitoring of optical cables.

[0018] In the figure: 1. Instrument housing; 2. ST-FC fiber optic adapter; 3. FC-ST fiber optic adapter; 4. External board; 5. Rectangular frame; 6. Fixing rod; 7. Internal board; 8. Instrument test ST female connector; 9. OTDR transmitting FC male connector; 10. Transmitting end optical fiber; 11. Testing end optical fiber; 12. Rubber skin. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] Reference Figure 1-2 An optical time domain reflectometer for online monitoring of optical cables includes an instrument housing 1, which is the outer shell of an optical time domain reflectometer in the prior art. An external plate 4 is fixedly installed on the outer end surface of the instrument housing 1, and the outer end surface of the external plate 4 is arranged on the outer side of the instrument housing 1. An internal plate 7 is arranged parallel to the inner side of the external plate 4, and the internal plate 7 is fixedly installed in the instrument housing 1. Fixed rods 6 are fixedly installed at the four corners of the inner end surface of the external plate 4, and the ends of the fixed rods 6 are fixedly connected to the external plate 4 by screws.

[0022] In this embodiment, a rectangular frame 5 is fixedly installed between the four fixing rods 6, and four rubber skins 12 are arranged in the rectangular frame 5. The rubber skins 12 are specifically made of high-elastic rubber. The upper and lower edges of the four rubber skins 12 are respectively fixedly installed on the inner top surface and the inner bottom surface of the rectangular frame 5. The four rubber skins 12 are arranged in a corrugated shape to seal the inner cavity of the rectangular frame 5 for dust prevention, and an overlapping contact portion is reserved between two adjacent rubber skins 12.

[0023] The optical time domain reflectometer for online monitoring of optical cables also includes a transmitting end optical fiber 10, a test end optical fiber 11, an OTDR transmitting FC male connector 9 and an instrument testing ST female connector 8. Both ends of the transmitting end optical fiber 10 and the test end optical fiber 11 are fixedly arranged in an instrument housing 1, the OTDR transmitting FC male connector 9 and the head end of the transmitting end optical fiber 10 are fixedly connected, and the instrument testing ST female connector 8 and the head end of the test end optical fiber 11 are fixedly connected;

[0024] It should be noted that the ends of the OTDR transmitting FC male connector 9 and the instrument test ST female connector 8 of the conventional optical time domain reflectometer in the prior art are fixedly mounted on the outside of the instrument housing 1. As is known to all, in daily optical cable testing, the transmitting port of the OTDR transmitting FC male connector 9 has a built-in ceramic core, which is very fragile, and most of the attenuation of the optical time domain reflectometer is caused by unclean optical fiber end faces, which can seriously cause the optical link to malfunction, that is, the OTDR transmitting FC male connector 9 and the instrument test ST female connector 8 are vulnerable parts of the optical time domain reflectometer;

[0025] In order to reduce the number of connections between the OTDR transmitting FC male connector 9 and the instrument testing ST female connector 8 and prevent the OTDR transmitting FC male connector 9 and the instrument testing ST female connector 8 from being contaminated by the external environment, the OTDR transmitting FC male connector 9 and the instrument testing ST female connector 8 in the present application are fixedly installed in the instrument housing 1, and the instrument housing 1 is used to block dust, and the ST-FC fiber optic adapter 2 and the FC-ST fiber optic adapter 3 are clamped at the transmitting port of the OTDR transmitting FC male connector 9 and the test port of the instrument testing ST female connector 8, and the transmitting port of the ST-FC fiber optic adapter 2 and the test port of the FC-ST fiber optic adapter 3 are arranged on the outside of the instrument housing 1, which are used to replace the OTDR transmitting FC male connector 9 and the instrument testing ST female connector 8 in the original technology, and a dust cover is softly connected to the outside through a rubber strip;

[0026] The OTDR transmitting FC male connector 9 and the instrument testing ST female connector 8 are fixedly installed on the built-in board 7 by multiple screws, and the OTDR transmitting FC male connector 9 and the instrument testing ST female connector 8 pass through the built-in board 7. The transmitting port of the ST-FC fiber optic adapter 2 and the testing port of the FC-ST fiber optic adapter 3 are fixedly installed on the outer end surface of the external board 4 by multiple screws, and the screws are arranged on the outer end surface of the external board 4. The ST-FC fiber optic adapter 2 and the FC-ST fiber optic adapter 3 pass through the external board 4, that is, they are arranged on the periphery of the instrument housing 1, and the replacement of the ST-FC fiber optic adapter 2 and the FC-ST fiber optic adapter 3 can be completed from the outside of the instrument housing 1.

[0027] In this embodiment, the inner side of the ST-FC fiber optic adapter 2 and the inner periphery of the FC-ST fiber optic adapter 3 are respectively squeezed through the gaps at two contact connections of the four rubber skins 12, and the four rubber skins 12 are deformed accordingly. When the ST-FC fiber optic adapter 2 or the FC-ST fiber optic adapter 3 is pulled out from the middle of the four rubber skins 12, the four rubber skins 12 are used to automatically seal the front side of the transmitting port of the OTDR transmitting FC male connector 9 or the test port of the instrument test ST female connector 8 through their own recoverable elasticity, which can effectively prevent dust from contaminating the transmitting port of the OTDR transmitting FC male connector 9 or the test port of the instrument test ST female connector 8.

[0028] In the utility model, the emission port of the ST-FC optical fiber adapter 2 and the test port of the FC-ST optical fiber adapter 3 are used to replace the emission port of the OTDR emission FC male connector 9 and the test port of the instrument test ST female connector 8 in the prior art, and the ST-FC optical fiber adapter 2 and the FC-ST optical fiber adapter 3 are snap-connected with the emission port of the OTDR emission FC male connector 9 and the test port of the instrument test ST female connector 8 in the present application, and then fixed to the outer end surface of the external plate 4 by screws, so that the ST-FC optical fiber adapter 2 and the FC-ST optical fiber adapter 3 can be replaced on the outer side of the instrument housing 1, eliminating the need to disassemble the part of the instrument housing 1, and there is no need to reconnect the emission end optical fiber 10 and the test end optical fiber 11, and the replacement process is simpler.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An optical time domain reflectometer for online monitoring of optical cables, comprising an instrument housing (1), an external board (4), an instrument test ST female connector (8) and an OTDR transmission FC male connector (9), wherein the external board (4) is fixedly mounted on the outer wall of the instrument housing (1), and characterized in that: The instrument test ST female connector (8) and the OTDR transmission FC male connector (9) are installed in the instrument housing (1); The test port of the instrument test ST female connector (8) is connected to an FC-ST optical fiber adapter (3), the emission port of the OTDR emission FC male connector (9) is connected to an ST-FC optical fiber adapter (2), and the emission port of the ST-FC optical fiber adapter (2) and the test port of the FC-ST optical fiber adapter (3) are fixedly mounted on the outside of the external plate (4) by means of screws.

2. The optical time domain reflectometer for online monitoring of optical cables according to claim 1, characterized in that: An internal plate (7) is arranged on the inner side of the external plate (4); the external plate (4) and the internal plate (7) are parallel to each other; and the external plate (4) and the internal plate (7) are fixedly connected via a plurality of fixing rods (6).

3. The optical time domain reflectometer for online monitoring of optical cables according to claim 2, characterized in that: A rectangular frame (5) is fixedly installed between the plurality of fixing rods (6), and four rubber skins (12) are arranged inside the rectangular frame (5).

4. The optical time domain reflectometer for online monitoring of optical cables according to claim 3, characterized in that: The four rubber skins (12) are contacted and connected to each other in sequence, and the ST-FC optical fiber adapter (2) and the FC-ST optical fiber adapter (3) pass through two contact connection points of the four rubber skins (12) respectively.

5. The optical time domain reflectometer for online monitoring of optical cables according to claim 2, characterized in that: The instrument test ST female connector (8) and the OTDR transmission FC male connector (9) are fixedly mounted on the built-in board (7).

6. The optical time domain reflectometer for online monitoring of optical cables according to claim 1, characterized in that: The head end of the instrument test ST female connector (8) is connected to a transmitting end optical fiber (10), and the head end of the OTDR transmitting FC male connector (9) is connected to a test end optical fiber (11).

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