CN1292609A - Optical power monitoring system - Google Patents
Optical power monitoring system Download PDFInfo
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- CN1292609A CN1292609A CN991216180A CN99121618A CN1292609A CN 1292609 A CN1292609 A CN 1292609A CN 991216180 A CN991216180 A CN 991216180A CN 99121618 A CN99121618 A CN 99121618A CN 1292609 A CN1292609 A CN 1292609A
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Abstract
The present invention provides an optical power monitoring system, and is characterized by that is adopts active light source, and utilizes standby fibre mode to make optical power alarm monitoring so as to implement real-time monitor of optical cable. The application of said invented optical power monitoring system does not produce interference to working light,and can save the optical elements of spectroscope and wavelength division multiplexing device, etc., so that it has strong practicability.
Description
The present invention relates to the monitoring system of optical fiber transmission network in the communication network, relate in particular to the system that the method that adopts luminous power to detect is monitored in real time to optical cable.
In the fiber network monitoring system, realize that the Real-time Alarm monitoring function generally has 3 kinds of modes: 1, electric alarm is collected, and 2, transmission network management collects, 3, optical power monitoring.
The investigation of the electric alarm collection that existing SDH (Synchronous Digital Hierarchy) (SDH) equipment is carried out shows, the electric alarm poor practicability, deadly defect is that the information of alarm signal is little, and the mistake alarm is too many, and making distal fiber test macro (RFTS) to judge whether is the No Light Alarm that we need.As long as just initiate optical time domain reflection (OTDR) test if receive Level 1Alarming, OTDR will ceaselessly test all day, and the life-span has a greatly reduced quality.
The network management alarm collection mode can be determined alarm cause, filters out the alarm of No Light Alarm relevant with test optical fiber and error code; And can determine to alarm scene, and navigate to certain equipment, certain light path, be convenient to optical fiber automatic monitoring system and initiate the OTDR test.Its biggest advantage is to save customer investment, need not any additional hardware device, and only need possess the interface software that carries out communication with SDH network management center and get final product.But owing to be difficult to collect and grasp the communication channel and the communications protocol of each producer substation and network management center, network management alarm is collected under the present condition, is difficult to realize.
Therefore, realize the real-time monitoring to optical cable, the method for unique practicality is exactly to adopt the method for optical power monitoring, and this method does not need to rely on SDH equipment, does not have interface problem, for inexhaustible trouble has been saved in engineering and maintenance.
It is to adopt online mode that existing luminous power detects alarm: as monitoring station (RTU) when being used for on-line monitoring, adopt optical splitter that the work light of optical transmission device is told 3-5%, in the access warning acquisition module, work light is carried out real-time monitoring, the transmission characteristic that reflects optical fiber in real time, and find the variation of transmission quality in time.The thresholding of each optical power monitoring passage can be set, and disconnected fine when monitored optical fiber appearance, the work optical power down is to a certain threshold value, or when bigger decay occurring, can produce alarm immediately, and start the RTU test automatically, carry out accurate fault judgement and location.Online mode is mainly used in the network that optical fiber takies the situation anxiety, but because it has added optics such as a large amount of wavelength division multiplexers (WDM), optical splitter, filter on working optical fibre, and the light of will working is told a part, bring interference inevitably, increased potential faults work light.
The objective of the invention is to overcome the deficiencies in the prior art part, and provide a kind of can the elimination that work light is produced the optical power monitoring system that disturbs.
The object of the present invention is achieved like this, adopts initiatively light source, and utilization is equipped with fine mode and carries out the luminous power alarm-monitor, to realize the real-time monitoring to optical cable.
Above-mentioned to be equipped with fine mode can be to adopt singly to be equipped with fine mode, and promptly alarm-monitor and optical tests are equipped with on the fibre at same and carry out.Its technical scheme is: a kind of optical power monitoring system, comprise test cell, optical switch, wavelength division multiplexer, luminous power alarm-monitor unit and control unit, it is characterized in that described test cell links to each other with an end T11 who is equipped with fibre of optical cable to be measured through described optical switch, wavelength division multiplexer; Described alarm-monitor unit includes initiatively light source and optical detection device, described optical detection device links to each other with the described T11 end that is equipped with fibre through described wavelength division multiplexer, described active light source is arranged on the described fine other end T12 that is equipped with, described active light source can produce the monitoring light that wavelength j is different from test light wavelength t, be equipped with fine T12 end to the transmission of T11 end from described, receive by optical detection device; When the optical power down of the monitoring light that sends was following to a certain threshold value, optical detection device produced alarm signal, sends test cell to through control unit, and it is that the test light of t is tested the fibre fully that is connected that control unit starts the test cell wavelength.
Above-mentioned to be equipped with fine mode also can be to adopt two fine modes that are equipped with, and promptly alarm-monitor carries out in different being equipped with on the fibre with optical tests.Its technical scheme is: a kind of optical power monitoring system, comprise test cell, optical switch, luminous power alarm-monitor unit and control unit, and it is characterized in that described test cell is equipped with a fine end through described optical switch with first of optical cable to be measured and links to each other; Described alarm-monitor unit includes initiatively light source and optical detection device, described optical detection device is equipped with a fine end T21 with second of described optical cable and links to each other, described active light source is arranged on described second and is equipped with fine other end T22, described active light source can produce monitoring light, be equipped with fine T22 end from described second and send, receive by optical detection device to the T21 end; When the optical power down of the monitoring light that sends was following to a certain threshold value, optical detection device produced alarm signal, sends test cell to through control unit, and control unit starts test cell and first is equipped with fibre and tests what connected with test light.
Optical power monitoring system of the present invention adopts the active light source, and utilization is equipped with fine mode and carries out the optical power monitoring alarm, does not need to utilize work light, thereby can not produce interference to work light, and can save optical elements such as optical splitter, wavelength division multiplexer.According to statistics, 80% the fault that takes place in optical cable can both detect by being equipped with fine test.Therefore, system of the present invention has very strong practicality.
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Fig. 1 is the schematic diagram of first execution mode of optical power monitoring system of the present invention;
Fig. 2 is the networking schematic diagram that optical power monitoring system shown in Figure 1 is applied to the arterial grid monitoring;
Fig. 3 is that optical power monitoring system shown in Figure 1 is applied to the networking schematic diagram of a plurality of optical routing networks in the local network monitoring;
Fig. 4 is that optical power monitoring system shown in Figure 1 is applied to the networking schematic diagram of optical switch cascade network in the local network monitoring;
Fig. 5 is the schematic diagram of second execution mode of optical power monitoring system of the present invention.
As shown in Figure 1, be first execution mode of optical power monitoring system of the present invention, promptly adopt the schematic diagram that singly is equipped with fine mode.In the present embodiment, optical power monitoring system comprises OTDR test cell 11, optical switch 12, wavelength division multiplexer 13, luminous power alarm-monitor unit and control unit (not shown), wherein, OTDR test cell 11 links to each other with an end T11 who is equipped with fibre of optical cable to be measured through optical switch 12, wavelength division multiplexer 13.The alarm-monitor unit includes initiatively light source 14 and optical detection device 15, and wherein, initiatively light source 14 can adopt laser diode (LD), and optical detection device 15 can adopt photodiode (PIN).Optical detection device 15 links to each other with the described T11 end that is equipped with fibre through wavelength division multiplexer 13, initiatively light source 14 is arranged on the described fine other end T12 that is equipped with, described active light source 14 can produce the monitoring light that wavelength j is different from test light wavelength t, be equipped with fine T12 end to the transmission of T11 end from described, receive by optical detection device 15.When the optical power down of the monitoring light that sends was following to a certain threshold value, optical detection device 15 produced alarm signals, sends test cell 11 to through control unit.Control unit comprises industrial computer and Control Software, and control unit startup test cell 11 usefulness wavelength are that the test light of t is tested the fibre that is equipped with that is connected.
Shown in Figure 2 is the networking schematic diagram that optical power monitoring system shown in Figure 1 is applied to the arterial grid monitoring.The characteristics of arterial grid monitoring are: network topology structure is simple, and the distance between each section optical cable is bigger, but often exceeds the test specification of OTDR, so need Dual-Ended Loop Test.The situation of private network such as railway also is similar to arterial grid.In the present embodiment, A station and B station are equipped with optical power monitoring system (RTU).RTU comprises optical tests head, WDM etc., and optical tests head wherein is to adopt the card insert type structure, includes power module, OTDR test module, optical switch module, luminous power alarm-monitor module and control module.Luminous power alarm-monitor module comprises initiatively light source 24 and optical detecting unit 25.Two ends T1, a T2 who is equipped with fibre respectively through WDM, is linked to each other with RTU.Initiatively light source 24 adopts wavelength j, and is luminous at the A station, through WDM, detected by optical detecting unit 25 at the B station.When the optical power down of the monitoring light that sends was following to a certain threshold value, optical detection device 25 produced alarm signals, sends test module to through control module, and control module is according to alarm signal, and the RTU that starts A station or B station adopts wavelength t to carry out the OTDR test.Initiatively light source generally is to adopt long-term luminous working method.For fear of monitoring light OTDR test is impacted, can between the optical switch at B station and OTDR, add filter 26.
Fig. 3 and shown in Figure 4 be the schematic diagram that first execution mode of the present invention is applied to the local network monitoring.The characteristics of local network monitoring are: optical cable segment is shorter, and an optical routing will be formed an optical routing by jumper connection through several SDH stations.Optical cable topological structure more complicated, the corresponding a plurality of optical routings of a general RTU may use the optical switch cascade.
Be illustrated in figure 3 as the network that an optical switch connects a plurality of optical routings.In the present embodiment, the active light source in the alarm-monitor unit can be the additional source of light of peripheral hardware, is arranged on the end of each optical routing, and this light source is luminous for a long time, carries out light in the RTU side and detects.Wavelength t is adopted in test, and optical power monitoring adopts wavelength j.And before the optical switch of RTU side, each optical routing all needs to connect a WDM, and each optical routing adopts separately independently testing circuit to monitor in real time.
Be illustrated in figure 4 as the network that uses the optical switch cascade.In the present embodiment, the active light source in the alarm-monitor unit can be the additional source of light of peripheral hardware also, is arranged on the end of each route of optical switch cascade.The 1st route of optical switch cascade directly is linked into switch, carrying out light by A station RTU detects, other routes of optical switch cascade insert switch by WDM, testing circuit by optical switch cascade itself detects, optical switch cascade at ordinary times is connected on the port one, so that optical cable segment 1 and a are monitored.
As shown in Figure 5, be second execution mode of optical power monitoring system of the present invention, promptly adopt two schematic diagrames that are equipped with fine mode.In the present embodiment, optical power monitoring system comprises OTDR test cell 31, optical switch 32, luminous power alarm-monitor unit and control unit (not shown), and wherein, OTDR test cell 31 is equipped with a fine end through optical switch 32 with first of optical cable to be measured and links to each other.The alarm-monitor unit includes initiatively light source 34 and optical detection device 35, optical detection device 35 is equipped with a fine end T31 with second of described optical cable and links to each other, initiatively light source 34 is arranged on the described second fine fully other end T32, initiatively light source 34 can produce monitoring light, being equipped with fine T32 end from described second sends to the T31 end, receive by optical detection device 35, when the optical power down of the monitoring light that sends is following to a certain threshold value, optical detection device 35 produces alarm signal, sends test cell 31 to through control unit; Control unit starts test cell 31 usefulness test light and first is equipped with fibre and tests what connect.
Claims (5)
1. optical power monitoring system, comprise test cell (11), optical switch (12), wavelength division multiplexer (13), luminous power alarm-monitor unit and control unit, it is characterized in that described test cell (11) links to each other with an end (T11) that is equipped with fibre of optical cable to be measured through described optical switch (12), wavelength division multiplexer (13); Described alarm-monitor unit includes initiatively light source (14) and optical detection device (15), described optical detection device (15) links to each other with the described T11 end that is equipped with fibre through described wavelength division multiplexer (13), described active light source (14) is arranged on the described fine other end (T12) that is equipped with, described active light source (14) can produce the monitoring light that wavelength j is different from test light wavelength t, be equipped with fine T12 end to the transmission of T11 end from described, receive by optical detection device (15); When the optical power down of the monitoring light that sends is following to a certain threshold value, optical detection device (15) produces alarm signal, send test cell (11) to through control unit, control unit startup test cell (11) is that the test light of t is tested the fibre that is equipped with that is connected with wavelength.
2. optical power monitoring system according to claim 1 is characterized in that, is provided with filter (26) between described test cell and optical switch.
3. optical power monitoring system according to claim 1 and 2, it is characterized in that, described optical switch is connected with more than 1 optical routing, each optical routing all be provided with an initiatively light source away from the test cell end, and be provided with an optical detection device at the optical routing end of test cell side, and before the optical switch of test cell side, each optical routing all connects a wavelength division multiplexer.
4. optical power monitoring system according to claim 1 and 2 is characterized in that described system also comprises the optical switch cascade, at the end of each route of optical switch cascade, all is provided with an initiatively light source.
5. optical power monitoring system, comprise test cell (31), optical switch (32), luminous power alarm-monitor unit and control unit, it is characterized in that described test cell (31) is equipped with a fine end through described optical switch (32) with first of optical cable to be measured and links to each other; Described alarm-monitor unit includes initiatively light source (34) and optical detection device (35), described optical detection device (35) is equipped with a fine end (T31) with second of described optical cable and links to each other, described active light source (34) is arranged on described second and is equipped with the fine other end (T32), described active light source (34) can produce monitoring light, be equipped with fine T32 end from described second and send, receive by optical detection device (35) to the T31 end; When the optical power down of the monitoring light that sends was following to a certain threshold value, optical detection device produced alarm signal, sends test cell (31) to through control unit, and control unit starts test cell (31) and first is equipped with fibre and tests what connected with test light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991216180A CN1146154C (en) | 1999-10-08 | 1999-10-08 | Optical power monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991216180A CN1146154C (en) | 1999-10-08 | 1999-10-08 | Optical power monitoring system |
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| CN1292609A true CN1292609A (en) | 2001-04-25 |
| CN1146154C CN1146154C (en) | 2004-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB991216180A Expired - Fee Related CN1146154C (en) | 1999-10-08 | 1999-10-08 | Optical power monitoring system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003077447A1 (en) * | 2002-03-08 | 2003-09-18 | Huawei Technologies Co., Ltd. | Digital regulated light receive module and regulation method |
| CN1305243C (en) * | 2003-05-09 | 2007-03-14 | 中兴通讯股份有限公司 | Testing method and apparatus for automatic light power reducing process time of dense wave divided multiplexing system |
| CN100479353C (en) * | 2003-04-10 | 2009-04-15 | 上海国欣科技发展有限公司 | Optical cable line real-time monitoring system and its method |
| CN102412896A (en) * | 2011-11-28 | 2012-04-11 | 武汉光迅科技股份有限公司 | Optical line protection system for realizing single-end monitoring |
| CN101442691B (en) * | 2008-12-22 | 2012-07-25 | 武汉光迅科技股份有限公司 | Optical cable monitoring system based on passive optical network system |
| CN104482859A (en) * | 2014-11-06 | 2015-04-01 | 国家电网公司 | Hydro-generator stator iron core displacement on-line monitoring system |
| CN104734776A (en) * | 2015-04-14 | 2015-06-24 | 国网吉林省电力有限公司信息通信公司 | Optic fiber monitoring system and monitoring method switching three operation modes freely |
| CN105553547A (en) * | 2015-12-16 | 2016-05-04 | 国网福建省电力有限公司 | Monitoring system of standby optical power cable |
| CN107809280A (en) * | 2016-09-09 | 2018-03-16 | 中兴通讯股份有限公司 | A kind of fiber-optic monitoring method and device |
| CN108809418A (en) * | 2018-08-13 | 2018-11-13 | 上海嘉慧光电子技术有限公司 | LAN_WDM optical devices detection device and method |
-
1999
- 1999-10-08 CN CNB991216180A patent/CN1146154C/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7376359B2 (en) | 2002-03-08 | 2008-05-20 | Huawei Technologies Co., Ltd. | Digital regulated light receive module and regulation method |
| WO2003077447A1 (en) * | 2002-03-08 | 2003-09-18 | Huawei Technologies Co., Ltd. | Digital regulated light receive module and regulation method |
| CN100479353C (en) * | 2003-04-10 | 2009-04-15 | 上海国欣科技发展有限公司 | Optical cable line real-time monitoring system and its method |
| CN1305243C (en) * | 2003-05-09 | 2007-03-14 | 中兴通讯股份有限公司 | Testing method and apparatus for automatic light power reducing process time of dense wave divided multiplexing system |
| CN101442691B (en) * | 2008-12-22 | 2012-07-25 | 武汉光迅科技股份有限公司 | Optical cable monitoring system based on passive optical network system |
| CN102412896B (en) * | 2011-11-28 | 2015-04-01 | 武汉光迅科技股份有限公司 | Optical line protection system for realizing single-end monitoring |
| CN102412896A (en) * | 2011-11-28 | 2012-04-11 | 武汉光迅科技股份有限公司 | Optical line protection system for realizing single-end monitoring |
| CN104482859A (en) * | 2014-11-06 | 2015-04-01 | 国家电网公司 | Hydro-generator stator iron core displacement on-line monitoring system |
| CN104482859B (en) * | 2014-11-06 | 2018-03-27 | 国家电网公司 | A kind of hydraulic generator stator core displacement on-line monitoring system |
| CN104734776A (en) * | 2015-04-14 | 2015-06-24 | 国网吉林省电力有限公司信息通信公司 | Optic fiber monitoring system and monitoring method switching three operation modes freely |
| CN104734776B (en) * | 2015-04-14 | 2017-05-17 | 国网吉林省电力有限公司信息通信公司 | Optic fiber monitoring system and monitoring method switching three operation modes freely |
| CN105553547A (en) * | 2015-12-16 | 2016-05-04 | 国网福建省电力有限公司 | Monitoring system of standby optical power cable |
| CN107809280A (en) * | 2016-09-09 | 2018-03-16 | 中兴通讯股份有限公司 | A kind of fiber-optic monitoring method and device |
| CN108809418A (en) * | 2018-08-13 | 2018-11-13 | 上海嘉慧光电子技术有限公司 | LAN_WDM optical devices detection device and method |
| CN108809418B (en) * | 2018-08-13 | 2024-03-29 | 上海嘉慧光电子技术有限公司 | LAN_WDM optical device detecting device and method |
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| CN1146154C (en) | 2004-04-14 |
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