CN108155935B - Optical cable network fault detection device - Google Patents
Optical cable network fault detection device Download PDFInfo
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- CN108155935B CN108155935B CN201711477705.2A CN201711477705A CN108155935B CN 108155935 B CN108155935 B CN 108155935B CN 201711477705 A CN201711477705 A CN 201711477705A CN 108155935 B CN108155935 B CN 108155935B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0791—Fault location on the transmission path
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Abstract
The invention discloses an optical cable network fault detection device, which comprises: the system comprises an integrated multi-path optical interface unit, a multiplexing unit, an optical coherent domain reflection detection unit, an optical switching unit and an intelligent management unit; the integrated multipath optical interface unit is used for connecting the optical transmitter and receiver to the optical cable network through the multiplexing unit; the multiplexing unit is used for connecting the optical transmitter and receiver into the integrated multi-path optical interface unit; the optical coherence domain reflection detection unit is used for outputting a detection signal and carrying out fault positioning according to a feedback signal corresponding to the detection signal; the light switching unit is used for gating the detected light channel under the control of the intelligent management unit; and the intelligent management unit is used for controlling the optical switch unit to gate the detected optical channel, establishing and managing transmission performance files of each optical fiber connector and the optical cable in the optical cable network, and providing fault early warning and positioning information. The invention overcomes the defects of low positioning precision and limitation of the existing optical cable network fault detection device.
Description
Technical Field
The invention belongs to the technical field of detecting instruments, and particularly relates to an optical cable network fault detecting device.
Background
In severe application environments (such as strong impact, continuous vibration, repeated plugging and unplugging, sudden temperature change and the like), the optical fiber connector in the optical cable network is very easy to break down, and the method mainly comprises the following steps: the vibration causes the surface of the optical fiber to be worn, so that the transmission loss is increased; in addition, the optical fiber connector precision alignment mechanism is abraded after repeated plugging operation or long-term working in a vibration environment, so that the alignment precision is reduced, and signal instantaneous interruption is caused under strong impact; in addition, in a large temperature difference environment, a sudden change in temperature will cause a fiber depression in the fiber optic connector, a bending of the fiber optic cable, and ultimately an increase in transmission loss.
The optical cable network fault detection device can monitor the transmission performance of each optical fiber connector and each optical cable in a multi-channel optical cable network, establish a transmission performance database, and timely perform fault early warning by periodically analyzing the change of the transmission performance of the optical cable network, so that the high-reliability operation of the optical cable network is ensured. In addition, when the optical fiber connector and the optical cable are damaged, the fault point is quickly and accurately positioned. The prior art has the following defects:
(1) it is difficult to locate the fault of the optical cable network with the length of 50 meters or less.
(2) Two failure points spaced less than 10 meters apart cannot be determined.
(3) The positioning precision is low and is more than 5 meters.
(4) And by adopting a discrete interface, the rapid detection of the multi-channel optical cable network cannot be conveniently realized.
Disclosure of Invention
The technical problem of the invention is solved: the defects of the prior art are overcome, and the optical cable network fault detection device is provided to overcome the defects that the existing optical cable network fault detection device is low in positioning precision and limited.
In order to solve the technical problem, the invention discloses an optical cable network fault detection device, which comprises: the system comprises an integrated multi-path optical interface unit, a multiplexing unit, an optical coherent domain reflection detection unit, an optical switching unit and an intelligent management unit;
the integrated multipath optical interface unit is used for connecting the optical transmitter and receiver to the optical cable network through the multiplexing unit;
the multiplexing unit is used for connecting the optical transmitter and receiver into the integrated multi-path optical interface unit;
the optical coherence domain reflection detection unit is used for outputting a detection signal and carrying out fault positioning according to a feedback signal corresponding to the detection signal;
the light switching unit is used for gating the detected light channel under the control of the intelligent management unit;
and the intelligent management unit is used for controlling the optical switch unit to gate the detected optical channel, establishing and managing transmission performance files of each optical fiber connector and the optical cable in the optical cable network, and providing fault early warning and positioning information.
The optical cable network fault detection device further comprises a fault detection unit;
and the power supply unit is used for providing power for the optical cable network fault detection device.
In the above-described optical cable network fault detection apparatus,
the multi-channel optical signals output by the optical transmitter and receiver and the optical cable network are accessed to the multiplexing unit of the optical cable network fault detection device through the integrated multi-channel optical interface unit.
In the above-described optical cable network fault detection apparatus,
the optical coherence domain reflection detection unit is used for outputting a detection signal after the intelligent management unit controls the optical switching unit to gate the detected optical channel of the optical cable network, and injecting the detection signal into the detected optical channel of the optical cable network through the multiplexing unit; monitoring the optical change of the feedback signal in real time to obtain a fault detection result; wherein the detection signal is reflected by a filter at the end of the optical cable network and returns a feedback signal along the optical cable network.
In the optical cable network fault detection device, the intelligent management unit is used for storing and analyzing the fault detection result output by the optical coherent domain reflection detection unit to form a report; and alarming when the hidden trouble of the fault is determined.
The invention has the following advantages:
(1) the fault monitoring of the optical cable network with the length of less than 50 meters can be carried out.
(2) And no measuring blind area exists.
(3) The precision is high and is better than 1 meter.
(4) And the integrated multi-path optical interface is adopted, so that the rapid detection of the multi-channel optical cable network is conveniently realized.
Drawings
Fig. 1 is a schematic structural diagram of an optical cable network fault detection apparatus according to an embodiment of the present invention;
fig. 2 is a schematic view of a measurement principle of an optical cable network fault detection device in an embodiment of the present invention;
in the figure: 00-optical transmitter and receiver, 10-integrated multi-path optical interface unit, 20-multiplexing unit, 30-optical coherent domain reflection detection unit, 40-optical switch unit, 50-intelligent management unit, 60-power supply unit, 70-optical cable network, 71-optical fiber connector I and 72-optical fiber connector II.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, common embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, a schematic structural diagram of an optical cable network fault detection apparatus in an embodiment of the present invention is shown. In this embodiment, the optical cable network fault detection apparatus includes: the system comprises an integrated multi-path optical interface unit 10, a multiplexing unit 20, an optical coherent domain reflection detection unit 30, an optical switch unit 40 and an intelligent management unit 50.
Referring to fig. 1, the integrated multiple optical interface unit is used for connecting an optical transceiver to an optical cable network through a multiplexing unit. And the multiplexing unit is used for connecting the optical transceiver 00 into the integrated multipath optical interface unit. And the optical coherence domain reflection detection unit is used for outputting a detection signal and positioning a fault according to a feedback signal corresponding to the detection signal, so that on-line fault detection is realized under the condition of not interrupting the service of the optical transceiver. And the light switching unit is used for gating the detected light channel under the control of the intelligent management unit. And the intelligent management unit is used for controlling the optical switch unit to gate the detected optical channel, establishing and managing transmission performance files of each optical fiber connector and the optical cable in the optical cable network, and providing fault early warning and positioning information.
In this embodiment, the multiple optical signals output by the optical transceiver and the optical cable network are connected to the multiplexing unit of the optical cable network fault detection apparatus through the integrated multiple optical interface unit. The multiplexing unit can simultaneously inject the service information of the optical transceiver and the detection signal sent by the optical coherent domain reflection detection unit into the optical cable network, and the service information and the detection signal are not interfered with each other, so that the fault on-line monitoring is realized.
In this embodiment, the optical coherent domain reflection detection unit is configured to output a detection signal after the intelligent management unit controls the optical switching unit to gate the detected optical channel of the optical cable network, and inject the detection signal into the detected optical channel of the optical cable network through the multiplexing unit; monitoring the optical change of the feedback signal in real time to obtain a fault detection result; wherein the detection signal is reflected by a filter at the end of the optical cable network and returns a feedback signal along the optical cable network.
In this embodiment, the intelligent management unit is configured to store and analyze the fault detection result output by the optical coherence domain reflection detection unit to form a report; and alarming when the hidden trouble of the fault is determined.
In a preferred embodiment of the present invention, the optical cable network fault detection apparatus may further include: and a power supply unit 60 for supplying power to the optical cable network fault detection device.
Referring to fig. 2, a schematic diagram of a measurement principle of an optical cable network fault detection apparatus in an embodiment of the present invention is shown.
In this embodiment, after the optical cable network 70 is built, the intelligent management unit 50 is used to output the gating signal of the optical channel to be tested of the optical cable network 70, and after the optical switch unit 40 receives the gating signal, the detection signal sent by the optical coherence domain reflection detection unit 30 is injected to the corresponding channel of the optical cable network to be tested through the multiplexing unit 20 and the integrated multi-channel optical interface unit 10. The failure events for fiber optic connectors I71, II 72,. cndot. cndot.. Furthermore, the captured fault position is located through the optical coherence domain reflection detection unit 30, the accurate positions of the optical fiber connectors I71, II 72, and the network node diagram of the optical cable network 70 is determined, and the network node diagram of the optical cable network 70 is generated in the intelligent management unit 50, so that the transmission performance of the optical cable and each optical fiber connector can be monitored in real time in an online manner in the use process of the optical cable network 70, when the performance deteriorates, early warning can be performed in advance, and once a fault occurs, the fault point can be located quickly and accurately.
Further, if the optical cable network 70 fails, the intelligent management unit 50 outputs a gating signal of the detected optical channel of the optical cable network 70, and after receiving the gating signal, the optical switch unit 40 injects the detection signal sent by the optical coherent domain reflection detection unit 30 into the corresponding channel of the detected optical cable network through the multiplexing unit 20 and the integrated multi-channel optical interface unit 10. At the point of failure, a high-reflectivity signal (feedback signal) will be generated, which is returned to the integrated multi-channel optical interface unit 10 along the optical cable network 70 and sent back to the optical coherence domain reflection detection unit 30 by the multiplexing unit 20 and the optical switch unit 40. The optical coherence domain reflection detection unit 30 determines the fault position according to the received high-reflectivity signal and reports the fault position to the intelligent management unit 50 for fault position warning; in the event of a failure of a fiber optic connector in the fiber optic cable network 70, the intelligent management unit 50 may further combine the detected high-reflectivity signal with a previously plotted network node map to accurately determine the location of the failed fiber optic connector.
The embodiments in the present description are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above description is only for the best mode of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Those skilled in the art will appreciate that the invention may be practiced without these specific details.
Claims (3)
1. An optical cable network fault detection device, comprising: the system comprises an integrated multi-path optical interface unit, a multiplexing unit, an optical coherent domain reflection detection unit, an optical switching unit and an intelligent management unit;
the integrated multipath optical interface unit is used for connecting the optical transmitter and receiver to the optical cable network through the multiplexing unit;
the multiplexing unit is used for connecting the optical transceiver to the integrated multi-path optical interface unit, so that the service information of the optical transceiver and the detection signal sent by the optical coherence domain reflection detection unit are simultaneously injected into the optical cable network and are not interfered with each other, and the fault on-line monitoring is realized;
the optical coherence domain reflection detection unit is used for outputting a detection signal after the intelligent management unit controls the optical switching unit to gate the detected optical channel of the optical cable network, and injecting the detection signal into the detected optical channel of the optical cable network through the multiplexing unit; monitoring the optical change of the feedback signal in real time to obtain a fault detection result; after the detection signal is reflected by a filter at the tail end of the optical cable network, a feedback signal is returned along the optical cable network;
the light switching unit is used for gating the detected light channel under the control of the intelligent management unit;
the intelligent management unit is used for storing and analyzing the fault detection result output by the optical coherent domain reflection detection unit to form a report; and, warning when determining the hidden trouble of the trouble;
the intelligent management unit stores and analyzes the fault detection result output by the optical coherent domain reflection detection unit to form a report; and when warning when determining the hidden trouble of the fault, including:
after the optical cable network is built, a gating signal of a measured optical channel of the optical cable network is output, and after the optical switch unit receives the gating signal, a detection signal sent by the optical coherence domain reflection detection unit is injected into a corresponding channel of the measured optical cable network through the multiplexing unit and the integrated multi-path optical interface unit; the method comprises the steps of manufacturing fault events of a plurality of optical fiber connectors in an optical cable network, positioning captured fault positions through an optical coherence domain reflection detection unit, determining the positions of the optical fiber connectors, and generating a network node diagram of the optical cable network in an intelligent management unit so as to monitor the transmission performance of the optical cable and the optical fiber connectors on line in real time in the using process of the optical cable network, when the performance is deteriorated, early warning is carried out in advance, and once a fault occurs, fault points are quickly and accurately positioned;
when the optical cable network fails, a gating signal of a measured optical channel of the optical cable network is output, after the optical switch unit receives the gating signal, a detection signal sent by the optical coherence domain reflection detection unit is injected into a corresponding channel of the measured optical cable network through the multiplexing unit and the integrated multi-path optical interface unit, a feedback signal is generated at a failure point, and the feedback signal returns to the integrated multi-path optical interface unit along the optical cable network and is sent back to the optical coherence domain reflection detection unit by the multiplexing unit and the optical switch unit; the optical coherence domain reflection detection unit determines the fault position according to the received feedback signal and reports the fault position to the intelligent management unit for fault position warning; if it is determined that the optical fiber connector in the optical cable network fails, the intelligent management unit can further combine the detected feedback signal with the drawn network node diagram to accurately determine the position of the failed optical fiber connector.
2. The optical cable network fault detection device of claim 1, further comprising;
and the power supply unit is used for providing power for the optical cable network fault detection device.
3. The optical cable network fault detection device of claim 1,
the multi-channel optical signals output by the optical transmitter and receiver and the optical cable network are accessed to the multiplexing unit of the optical cable network fault detection device through the integrated multi-channel optical interface unit.
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| CN201711477705.2A CN108155935B (en) | 2017-12-29 | 2017-12-29 | Optical cable network fault detection device |
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| CN110752871B (en) * | 2018-12-05 | 2022-05-13 | 中兴通讯股份有限公司 | Optical link diagnostic method, and corresponding device and storage medium |
| CN110920448B (en) * | 2019-12-24 | 2021-06-11 | 重庆国翰能源发展有限公司 | Power conversion module control method for four-pile charging pile |
| CN113568064A (en) * | 2020-04-28 | 2021-10-29 | ***通信集团浙江有限公司 | Optical cable vibration detection method and system and computing equipment |
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| CN101252393B (en) * | 2008-04-01 | 2012-05-09 | 武汉光迅科技股份有限公司 | Optic cable automatic monitoring system with optical fiber automatic switch unit |
| US8654320B2 (en) * | 2008-06-02 | 2014-02-18 | Sumitomo Electric Industries, Ltd. | Beam Path Monitoring Device and Beam Path Monitoring System |
| JP2010139253A (en) * | 2008-12-09 | 2010-06-24 | Sumitomo Electric Ind Ltd | Optical line monitoring system, and monitoring device included in the system |
| CN105790833A (en) * | 2014-12-23 | 2016-07-20 | 中富通股份有限公司 | Dynamic optical network monitoring system based on GIS technology |
| CN104980212B (en) * | 2015-06-24 | 2017-08-25 | 国家电网公司 | Optical fiber fault detecting system and method with self-learning function |
| CN206524837U (en) * | 2017-01-11 | 2017-09-26 | 山西恒海创盈科技有限公司 | Multi-path OTDR electric power optical cable real time on-line monitoring devices |
| CN107181522A (en) * | 2017-05-18 | 2017-09-19 | 云南电网有限责任公司红河供电局 | Based on patterned optical cable intelligent total management operational system |
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| CN103441794A (en) * | 2013-09-05 | 2013-12-11 | 重庆大学 | Transformer station optical fiber fault locating system and method |
| CN106330306A (en) * | 2016-11-24 | 2017-01-11 | 国网山西省电力公司忻州供电公司 | GIS-based positioning method for optical cable fault points |
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