CN203883840U - Optical cable online monitoring device - Google Patents
Optical cable online monitoring device Download PDFInfo
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- CN203883840U CN203883840U CN201420215619.XU CN201420215619U CN203883840U CN 203883840 U CN203883840 U CN 203883840U CN 201420215619 U CN201420215619 U CN 201420215619U CN 203883840 U CN203883840 U CN 203883840U
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- 239000013307 optical fiber Substances 0.000 abstract description 12
- 238000004891 communication Methods 0.000 description 18
- 238000000253 optical time-domain reflectometry Methods 0.000 description 7
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- Optical Communication System (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The utility model provides an optical cable online monitoring device. The optical transceiver of a management center is orderly connected with a front end optical fiber distribution frame, an optical cable, a back end optical fiber distribution frame, a filter and the optical transceiver of a remote monitoring station to form optical fiber transmission equipment. An optical multiplexing device used for extracting partial working light from the optical fiber transmission equipment is connected between the optical transceiver of the management center and the front end optical fiber distribution frame. The optical multiplexing device is orderly connected with an optical switch, an optical power monitor and an optical time domain reflectometer used for emitting testing light. The optical power monitor is orderly connected with an A/D converter and an acousto-optic alarm. A working power supply is extracted from a direct current system. According to the device, the optical cable transmission is subjected to real-time online monitoring, the display and acousto-optic alarm of a checked fault are realized, thus the fault is eliminated timely, and the normal operation of optical cable transmission work is ensured.
Description
Technical field
The utility model relates to optical cable transmission fault monitoring system, particularly fiber optic cable communications transmission fault real-time monitoring device for intelligent power network.
Background technology
The importance of optical cable monitoring system:
In the information age, optical cable has become the main path of communication transfer, especially plays an important role at aspects such as electrical network intelligent construction, power scheduling, information exchanges.
Because fiber optic communications is widely used, system is huge, and the probability breaking down is also larger, as produce one even many fibre core signals weaken the situation of even interrupting and happen occasionally.At present optical cable maintenance management is still artificial mode, accident is searched very difficult, often in the time that problem is very serious, could find, mediates fault time also longer, directly affects the safe operation of power grid communication.
Therefore, research and construction optic cable automatic monitoring system, form sampling judgement automatically, realize quick fault location, accomplish promptly and accurately to report to the police, make the maintenance management of lightguide cable link in controlling and foreseeable state, for the electric power system that relates to industrial and agricultural production and huge numbers of families, imperative.
The fault characteristic of optical cable:
Optical cable extends toward each user from central station, and branched line is a lot of, and situation about breaking down often has.Phenomenon of the failure main manifestations is: joint is loosening, loss increase, luminosity reduce, separately have steam to infiltrate, construction damages, even disconnected fine etc.
Fiber failure also has a feature, and generic failure can not cause that optical cable transmission signal interrupts immediately, but causes slowly bad change of cable system, progressively increase the weight of impact to transmission quality, so, analyzing and processing in time, mediate fault, make normally carrying out of communication work.
Utility model content
The purpose of this utility model is to provide a kind of optical cable on-Line Monitor Device, with Real-Time Monitoring optical cable transmission fault warning.
The purpose of this utility model is achieved in that a kind of optical cable on-Line Monitor Device, comprise, the optical transmitter and receiver of administrative center connects the optical transmitter and receiver composition fibre optic transmission equipment of front end fibre distribution frame, optical cable, rear end fibre distribution frame, filter and far-end monitoring station in turn, is connected between the optical transmitter and receiver and front end fibre distribution frame of described administrative center as the division multiplexing optical device that takes out some work light from described fibre optic transmission equipment;
Division multiplexing optical device connects in turn optical switch, optical power monitor and is used as the optical time domain reflectometer that sends test light, and optical power monitor connects A/D converter and described audible-visual annunciator in turn.
Described A/D converter is also connected with digital display simultaneously.
Described working power is ﹢ 15V and ﹢ 5V, divides to get to obtain from direct current system.
The test light wavelength that described optical time domain reflectometer sends is 1625nm, and described division multiplexing optical device takes out 3% ~ 5% work light from fibre optic transmission equipment.
Described division multiplexing optical device model is DV-MUX3, and fibre distribution frame model is YD/T778, and optical switch model is FFT-310, and optical power detector model is AQ-1112B, and optical time domain reflectometer model is HP8147, and filter model is 30EHZ6.
The utlity model has following characteristics and advantage:
1, this monitoring system can be carried out real time on-line monitoring to optical cable transmission fault, utilizes this device can implement photometry, detects light wave loss, finds the malfunction monitorings such as the disconnected fibre of optical cable.
2, found fault is made to demonstration, warning etc., thereby fault is processed in time, got rid of in time, working properly the carrying out of guarantee information transmission.
Brief description of the drawings
Fig. 1 is the electric theory structure block diagram of this device.
Fig. 2 is the working power circuit figure of this device.
Embodiment
Fig. 1 illustrates this optical cable on-Line Monitor Device, the optical transmitter and receiver of administrative center connects the optical transmitter and receiver composition fibre optic transmission equipment of front end fibre distribution frame, optical cable, rear end fibre distribution frame, filter and far-end monitoring station in turn, is connected between the optical transmitter and receiver and front end fibre distribution frame of described administrative center as the division multiplexing optical device that takes out some work light from described fibre optic transmission equipment; Division multiplexing optical device connects in turn optical switch, optical power monitor and is used as the optical time domain reflectometer that sends test light, and optical power monitor connects A/D converter and described audible-visual annunciator in turn.
Described A/D converter is also connected with digital display.
Optical cable transmission principle:
In Fig. 1, the light source of carrying communication signal sends from the optical transmitter and receiver (Optical transceiver) of administrative center TSC, through division multiplexing optical device WDM, pass to fibre distribution frame ODF, fibre distribution frame plays the effect of connection, tissue, distribution, communication signal is sent to the optical cable (being connected between former and later two fibre distribution frames) of many fibre cores compositions.
Through the transmission of certain distance, arrive far-end monitoring station RTU, also here to connect, distribute through fibre distribution frame ODF, and filtered the Different lightwave length signals infecting by filter FILTER in transmission, remain with communication signal, the optical transmitter and receiver of passing to again in monitoring station is done the processing such as decoding, then provides available information to backstage.
Above, completed the overall process of fiber-optic signal transmission, transmission, reception, filtering, application.
Fiber optic cable monitor principle:
The division multiplexing optical device WDM of Fig. 1 front end serial connection, plays monitoring sampling action, and the work light of transmission equipment is separated 3% to 5% access monitoring modular by it, and work light is carried out to Real-Time Monitoring, examines the transmission performance of looking optical fiber, finds in time the variation of transmission quality.Optical switch OSW and luminous power device OPM form monitoring channel, play sampling, comparison, judgement effect; Threshold value can be set, when disconnected fine or decay appears in monitored optical fiber, make monitored work optical power down to a certain threshold value, even disconnected fine when unglazed, enabling signal, exciting light time-domain reflector OTDR, sends testing light source to system, further optical cable is detected, and do be out of order judgement and location; Test signal is done A/D conversion by another side, and (being realized by digital display and audible-visual annunciator) realizes digital demonstration and sound and light alarm, and prompting correlation technique and administrative staff note observing, judge and process the Cable's Fault occurring.
Test be light pulse by transmitting different wave length in optical fiber, and then received by OTDR port that the information returned carries out.In this monitoring mode, adopt division multiplexing optical device WDM to realize while transport communication light and OTDR test light in a fibre core.Conventional Communication ray wavelength is 1310nm and 1550nm at present, and therefore in this monitoring mode, the test light wavelength of OTDR is selected as 1625nm.
In light source issuing side, WDM is carried out multiplexing, two kinds of light waves of the same time internal loading of this optical cable thus, these two kinds of optical wavelengths are different, arrived receiving terminal, filter will leave these two kinds of light waves respectively, selects as required.
In the time that light pulse is transmitted in optical fiber, due to the structural property of optical fiber itself, there is connector, have junction point, have bending or other state and produce scattering, reflection.Wherein a part of scattering and reflection will turn back in OTDR, and the variation of the useful information returning a little less than as the time on diverse location in optical fiber or curve segment and light intensity, is measured by OPM, make and analyze judgement, find fault, and alarm, reach thus monitoring object.
Described division multiplexing optical device model is DV-MUX3, and fibre distribution frame model is YD/T778, and optical switch model is FFT-310, and optical power detector model is AQ-1112B, and optical time domain reflectometer model is HP8147, and filter model is 30EHZ6.
DC supply:
In Fiber Optical Communication System, complete the functions such as opto-electronic conversion, signal transmission, malfunction monitoring, sound and light alarm, need to use the facilities such as optical transmitter and receiver, point multiple device, distributing frame, filter, time-domain reflectomer, optical power monitor, and these facilities to operate, and must have working power.In conjunction with on-the-spot, fiber optic network itself just has 48V communication power supply, therefore this monitoring system is taked to simplify to draw to connect using method (separately not establishing power of alterating and direct current), is generally the work characteristics of 15V, 5V according to each device, does necessary reduction regulation processing.As shown in Figure 2:
In Fig. 2, we to the 48V power supply dividing potential drop of connecting, extract 15V voltage from potentiometer adjustable terminations, in like manner by resistance R 1, R2, potentiometer W1, through potentiometer W2, resistance R 3,15V power supply is carried out to second divided voltage again, take out 5V voltage from potentiometer adjustable terminations.Each assembling device that the direct voltage taking out is supplied with optical cable monitoring system uses.
In Fig. 2, also comprise another feature: all resistance all has protective effect.As above arrange R1 in circuit and prevent that potentiometer adjustable terminations is near 48V value, overtension can cause the scaling loss of electrical appliance like this; R2 prevents that potentiometer adjustable terminations is allocated to earth terminal, directly causes the scaling loss of power supply and energy storage device.The protective effect of R3 in 5V bleeder circuit is identical.
What Fig. 2 provided is the basic circuit that aligns power series pressure, if residing environment is negative supply or duplicate supply, can obtain required voltage value by circuit reverse graft or tapping method.
Applicating example:
In the fiber optic communications in inland river power scheduling office stone swallow bridging power station to 20kM in city, on-line monitoring system is installed.One day of in September, 2013, stone swallow bridge power station OTDR test data finds, and from stone swallow bridging power station, there is large attenuation at 12km place, carefully measures the receipts luminous power of optical transmission device opposite end, and wherein low an arrive-52dB of core light signal, reaches monitoring, alarming threshold value.According to these data, judge that optical cable has fault.So send technical staff to patrol and examine along communication line, find to be dug folding from the ADSS optical cable at 8km place, city by construction, soon fracture.So, to this welding again of wrecking a little, and do smooth reparation, finally make this section of communication cable recover normal work.
This monitoring system is sent alarm signal in time, and Monitoring Data is provided, and has made guidance for analyzing looking up the fault, has saved manpower and materials, has accelerated the process that fault is mediated, and it is feasible, reliable embodying this optic cable automatic monitoring system.
In sum, the fast development of fiber optic network, makes traditional manual detection maintenance mode seem very backward, and for this reason, we have carried out the improvement design of automated watch-keeping facility.The maximum feature of design is to use communication cable, transmit the light pulse of different wave length, and utilize optical time domain reflectometer OTDR to receive return information, make it fiber optic communications system carry out timely monitor, observe the transmission performance of optical fiber with dynamical fashion, accurately the time place of failure judgement, carry out in time and mediate processing, the effect and the security performance that have increased substantially thus cable system communication, through practical validation, this optic cable automatic monitoring system is quite worthy of popularization.
Claims (5)
1. an optical cable on-Line Monitor Device, comprise, the optical transmitter and receiver of administrative center connects the optical transmitter and receiver composition fibre optic transmission equipment of front end fibre distribution frame, optical cable, rear end fibre distribution frame, filter and far-end monitoring station in turn, audible-visual annunciator, it is characterized in that, also have, be connected between the optical transmitter and receiver and front end fibre distribution frame of described administrative center as the division multiplexing optical device that takes out some work light from described fibre optic transmission equipment;
Division multiplexing optical device connects in turn optical switch, optical power monitor and is used as the optical time domain reflectometer that sends test light, and optical power monitor connects A/D converter and described audible-visual annunciator in turn.
2. optical cable on-Line Monitor Device according to claim 1, is characterized in that, described A/D converter is also connected with digital display.
3. optical cable on-Line Monitor Device according to claim 1 and 2, is characterized in that, described working power is to divide and get the ﹢ 15V and the ﹢ 5V that obtain from 48V direct current system.
4. optical cable on-Line Monitor Device according to claim 3, is characterized in that, the test light wavelength that described optical time domain reflectometer sends is 1625nm, and described division multiplexing optical device takes out 3% ~ 5% work light from fibre optic transmission equipment.
5. optical cable on-Line Monitor Device according to claim 4, it is characterized in that, described division multiplexing optical device model is DV-MUX3, fibre distribution frame model is YD/T778, optical switch model is FFT-310, optical power detector model is AQ-1112B, and optical time domain reflectometer model is HP8147, and filter model is 30EHZ6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420215619.XU CN203883840U (en) | 2014-04-29 | 2014-04-29 | Optical cable online monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420215619.XU CN203883840U (en) | 2014-04-29 | 2014-04-29 | Optical cable online monitoring device |
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| CN203883840U true CN203883840U (en) | 2014-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420215619.XU Expired - Lifetime CN203883840U (en) | 2014-04-29 | 2014-04-29 | Optical cable online monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106330298A (en) * | 2016-08-31 | 2017-01-11 | 国脉科技股份有限公司 | Real-time optical cable fiber core monitoring system |
-
2014
- 2014-04-29 CN CN201420215619.XU patent/CN203883840U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106330298A (en) * | 2016-08-31 | 2017-01-11 | 国脉科技股份有限公司 | Real-time optical cable fiber core monitoring system |
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Granted publication date: 20141015 |