CN209545594U - A kind of Cable's Fault monitoring and positioning system - Google Patents
A kind of Cable's Fault monitoring and positioning system Download PDFInfo
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- CN209545594U CN209545594U CN201920510802.5U CN201920510802U CN209545594U CN 209545594 U CN209545594 U CN 209545594U CN 201920510802 U CN201920510802 U CN 201920510802U CN 209545594 U CN209545594 U CN 209545594U
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Abstract
The utility model discloses a kind of Cable's Fault monitoring and positioning systems, the system includes optical cable monitoring unit (1), central processing unit (2) and failure location unit (3), the optical cable monitoring unit (1) is for being monitored the operating status of optical cable, and the Cable's Fault monitored alarm is transmitted to central processing unit (2), the central processing unit (2) is used to respond the Cable's Fault alarm received, control failure location unit detect and be analyzed and processed to detection data, the failure location unit (3) is used to carry out detection and localization to fault points of optical cables, and it will test data and be transmitted to central processing unit (2).Cable's Fault monitoring and positioning system described in the utility model, high degree of automation, wide adaptation range, the interruption that data are transmitted when avoiding Cable's Fault, Cable's Fault monitoring range is big, and fault location precision is high.
Description
Technical field
The utility model relates to fiber optic cable communications malfunction monitoring fields, and in particular to a kind of Cable's Fault monitoring and positioning system.
Background technique
Fiber optic communication is that, using optical fiber as a kind of communication mode of transmission medium, have transmission using light wave as carrier wave
The advantages that bandwidth, capacity are big, loss is low, anti-interference, has been rapidly developed in recent years.China has been built up substantially and light
Based on cable, supplemented by microwave, satellite, national, technologically advanced, large capacity the network foundation platform of covering, fiber optic communication is in electric power
It is also widely used and develops in terms of device, and become the Primary communication mode in power communication device.
Currently, the Primary communication route in China is generally all transmitted using optical cable, two optical cables are often embedded in underground, occur
Fault point is difficult to check when failure；And optical cable laying length is longer, is carried out using common optical time domain reflectometer (OTDR) technology
Detection a wide range of over long distances needs to expend huge manpower, can also have biggish detection blind area, use extremely inconvenient.
In addition, a variety of detection systems in the prior art are laid particular emphasis on to optical cable real time monitoring and fault location more, but can
There are the interruptions of optical cable transmission business, seriously affect the use of fiber cable network.
Therefore, it is necessary to provide, a kind of positioning accuracy is high, the time-consuming short and troubleshooting of troubleshooting does not influence normal transmission
Cable's Fault monitoring and positioning system.
Utility model content
In order to overcome the above problem, present inventor has performed sharp studies, design a kind of Cable's Fault monitoring positioning system
System, the system include the optical cable monitoring unit being monitored to the operating status of optical cable, carry out detection and localization to fault points of optical cables
Failure location unit and monitoring data are analyzed and are sent with the central processing unit of instruction, the optical cable monitoring unit and
Failure location unit can be monitored positioning to Cable's Fault simultaneously, avoid monitoring blind area, improve fault removal efficiency；
Reserve cable is also set up in optical cable monitoring unit, can be automatically switched in Cable's Fault, data when avoiding Cable's Fault
The interruption of transmission, so as to complete the utility model.
Specifically, the purpose of this utility model is to provide a kind of Cable's Fault monitoring and positioning systems, wherein the system
System includes optical cable monitoring unit 1, central processing unit 2 and failure location unit 3,
Wherein, the optical cable monitoring unit 1 include light power monitoring measuring unit 11, optical time domain reflectometer 12, key light switch 13,
Spare photoswitch 14, tested optical cable 15 and reserve cable 16,
The reserve cable 16 is sequentially connected spare photoswitch 14, optical time domain reflectometer 12 and light power monitoring measuring unit 11,
The tested optical cable 15 is sequentially connected key light switch 13, optical time domain reflectometer 12 and light power monitoring measuring unit 11；
The light power monitoring measuring unit 11 includes light power meter 111, alarm 112 and processor 113, the optical power
Meter, alarm and processor electrical connection；
The optical cable monitoring unit 1 further includes running equipment monitor 17 and running environment monitor 18, and the operation is set
Standby monitor 17 is electric signal sensor, and the running environment monitor 18 includes temperature sensor and humidity sensor；
The failure location unit 3 includes data processing unit 31, light emitting unit 32, optical fiber splitter 33 and fiber optic loop
Shape device 34,
The data processing unit 31 includes memory 311 and converter 312
The light emitting unit 32 includes the light source 321 and filter 322 interconnected.
Wherein, the light power meter 111 is the OPM150 light power meter of Artifex, and the processor 113 is MCU processing
Device.
Wherein, the central processing unit 2 is connected to the network by wireless communication with optical cable monitoring unit 1, the centre
Managing unit 2 includes main control unit 21 and automatic switch unit 22, the Cable's Fault signal that the optical cable monitoring unit 1 will monitor
Network transmission is to main control unit 21 by wireless communication, after 21 discriminatory analysis of main control unit, sends switching command to cutting automatically
Change unit 22.
Wherein, the central processing unit 2 is arm processor, and the main control unit 22 uses AT91RM9200 chip, institute
Stating automatic switch unit 22 is optical path auto-switch device.
Wherein, the central processing unit 2 further includes location information processing unit 23, and acquisition failure location unit 3 is sent out
The information penetrated, and be transmitted to main control unit 21 and be analyzed and processed.
Wherein, the information process unit 23 is oscillograph.
Wherein, the optical fiber splitter 33 includes an input terminal and two output ends,
The filter 322 is connect with the input terminal of optical fiber splitter 33, the first output end of the optical fiber splitter 33
It is connect with optical fiber circulator 34, the second output terminal of the optical fiber splitter 33 is connect with data processing unit 31.
Wherein, the optical fiber circulator (34) is three fiber port circulators.
Wherein, the light source 321 is ASE light source,
The filter 322 is wavelength tunable filter, and operating wavelength range is 1530nm~1565nm.
Wherein, the memory uses ATmega328P chip,
The converter 312 is photodetector.
Beneficial effect possessed by the utility model includes:
(1) Cable's Fault monitoring and positioning system described in the utility model, increases reserve cable and automatic switch unit,
When avoiding Cable's Fault the problem of data-transmission interruptions, while time guarantee is provided for breakdown maintenance；
(2) Cable's Fault monitoring and positioning system described in the utility model, at the same it is fixed using optical time domain reflectometer and failure
Bit location two ways is monitored Cable's Fault, can significantly improve fault location precision, reduces troubleshooting time, mentions
High working efficiency；
(3) Cable's Fault monitoring and positioning system described in the utility model is additionally arranged running equipment monitor and operation ring
Border monitor expands the monitoring range of Cable's Fault, so that monitoring is more comprehensive；
(4) Cable's Fault monitoring and positioning system described in the utility model, structure is simple, easily operated, the degree of automation
Height, wide adaptation range.
Detailed description of the invention
Fig. 1 shows a kind of structural schematic diagram of the Cable's Fault monitoring and positioning system of preferred embodiment of the utility model.
Drawing reference numeral explanation:
1- optical cable monitoring unit；
11- light power monitoring measuring unit；
111- light power meter；
112- alarm；
113- processor；
12- optical time domain reflectometer；
13- key light switch；
The spare photoswitch of 14-；
15- is tested optical cable；
16- reserve cable；
17- running equipment monitor；
18- running environment monitor；
2- central processing unit；
21- main control unit；
22- automatic switch unit；
23- information process unit；
3- failure location unit；
31- data processing unit；
311- memory；
312- converter；
32- light emitting unit；
321- light source；
322- filter；
33- optical fiber splitter；
34- optical fiber circulator；
The first output end of a-；
B- second output terminal；
A- first port；
B- second port；
C- third port.
Specific embodiment
The utility model is further described below by drawings and embodiments.Illustrated by these, this is practical
Novel feature and advantage will become more apparent from clear.Wherein, although the various aspects of embodiment are shown in the attached drawings,
But unless otherwise indicated, it is not necessary to attached drawing drawn to scale.
The utility model provides a kind of Cable's Fault monitoring and positioning system, as shown in Figure 1, the system comprises optical cable prisons
Unit 1, central processing unit 2 and failure location unit 3 are surveyed,
Wherein, the optical cable monitoring unit 1 is used to be monitored the operating status of optical cable, and the optical cable monitored is former
Barrier alarm is transmitted to central processing unit 2,
The central processing unit 2 is used to respond the Cable's Fault alarm received, controls failure location unit
Detect and detection data is analyzed and processed,
The failure location unit 3 is used to carry out detection and localization to fault points of optical cables, and will test data and be transmitted to center
Processing unit 2.
According to a kind of preferred embodiment of the utility model, the optical cable monitoring unit 1 includes light power monitoring measuring unit
11, photoswitch and optical time domain reflectometer 12,
The photoswitch includes key light switch 13 and spare photoswitch 14.
In further preferred embodiment, the optical cable monitoring unit 1 further includes tested optical cable 15 and reserve cable
16,
The reserve cable 16 is sequentially connected spare photoswitch 14, optical time domain reflectometer 12 and light power monitoring measuring unit 11,
The tested optical cable 15 is sequentially connected key light switch 13, optical time domain reflectometer 12 and light power monitoring measuring unit 11.
In the present invention, the shape that optical cable transmission can not carry out when setting reserve cable can be avoided tested optical cable exception
Condition.
According to a kind of preferred embodiment of the utility model, the light power monitoring measuring unit 11 include light power meter 111,
Alarm 112 and processor 113,
The light power meter 111 is used to monitor the optical power of tested optical cable 15 and issues abnormal signal for failure,
The abnormal signal that the alarm 112 is used to detect light power meter sounds an alarm,
The processor 113 is for storing and sending monitoring information.
Preferably, the light power meter, alarm and processor electrical connection.
Wherein, the light power meter judges whether tested optical cable is normal by the optical power that test receives, when optical cable occurs
When the failures such as disconnected fibre, light power meter can not receive light, and then issue abnormal signal to processor, and processor controls alarm and issues police
Report.
In the present invention, the light power meter is preferably the OPM150 light power meter of Artifex, the processor
113 be preferably MCU processor.
In further preferred embodiment, the alarm 112 is combined aural and visual alarm or buzzer siren.
In embodiment still more preferably, the processor 113 is connect with optical time domain reflectometer 12.
In the present invention, the abnormal signal of storage is transmitted to central processing unit, central processing by the processor
Instruction of the unit to the instruction of switching optical cable and starting OTDR test is issued after abnormal signal discriminatory analysis, so that OTDR will test number
According to central processing unit is back to, failure bigness scale data are obtained.
Wherein, circuit and cordless communication network are connect the processor with central processing unit by wireless communication.
According to a kind of preferred embodiment of the utility model, the optical cable monitoring unit 1 further includes running equipment monitoring
Device 17 and running environment monitor 18, the two are connect with the processor of light power monitoring measuring unit 113, with monitor ambient condition and
Equipment safety state.
In further preferred embodiment, the running equipment monitor 17 is electric signal sensor, preferably electric
Flow sensor or voltage sensor.
Wherein, multiple equipment can be often accessed in transmission cable, unit exception also results in optical cable transmission failure, due to access
Equipment be electric signal transmission, when it occurs abnormal, the electric signal sensor can because receiving abnormal electric signal and
Cause sensor to issue abnormal alarm, and then be transmitted to the main control module of central processing unit, be analyzed and processed, issues maintenance
Instruction.
In embodiment still more preferably, the running environment monitor 18 includes that temperature sensor and humidity pass
Sensor, alarmed extremely optical cable operating ambient temperature and humidity.
Wherein, temperature sensor and humidity sensor preset environment required temperature numerical value and humidity, work as detection
When temperature and humidity into environment is beyond or below setting value, temperature sensor and humidity sensor can issue signal to handling
Device 113, signal is issued alarm 112 and carries out alarm by processor, while being transmitted a signal to main control module and being analyzed and processed
And response.
According to a kind of preferred embodiment of the utility model, the central processing unit 2 passes through with optical cable monitoring unit 1
Cordless communication network connection, the central processing unit 2 include main control unit 21 and automatic switch unit 22, wherein
The main control unit 21 is used to carry out discriminatory analysis to received abnormal signal, and sends switching command to cutting automatically
Unit 22 is changed,
The automatic switch unit 22 is used to control the switching of spare photoswitch and key light switch.
In the present invention, optical cable abnormal signal is sent to main control unit, main control unit by the optical cable monitoring unit
Automatic switch unit is sent a command to after carrying out discriminatory analysis, by key light switching to spare photoswitch.
In further preferred embodiment, the central processing unit 2 is arm processor, and the main control unit is adopted
With AT91RM9200 chip.
Wherein, the automatic switch unit is optical path auto-switch device, can be cut automatically using commonly used in the prior art
Parallel operation, such as: instrument is automatically switched in the protection of Yu Guang/AC-SW100 optical path, and instrument is automatically switched in the protection of HYT/HYT-OPS-1U optical path.
According to a kind of preferred embodiment of the utility model, the central processing unit 2 further includes location information processing
Unit 23, is used to acquire the information of failure location unit transmitting, and is transmitted to main control unit 21 and is analyzed and processed.
In further preferred embodiment, the information process unit 23 is oscillograph, and the failure of acquisition is determined
Position information generates data, and is transmitted to main control unit and is handled.
In the present invention, oscillograph is not specially limited, oscillograph commonly used in the prior art can be used,
Such as: the general source 100m oscillograph of Tyke oscillograph tds2022c, RIGOL.
According to a kind of preferred embodiment of the utility model, the failure location unit 3 includes data processing unit 31,
Light emitting unit 32, optical fiber splitter 33 and optical fiber circulator 34,
Wherein, the light emitting unit 32 includes the light source 321 and filter 322 interconnected.
In further preferred embodiment, the optical fiber splitter 33 includes an input terminal and two output ends,
Described two output ends are respectively the first output end a and second output terminal b,
The filter 322 is connect with the input terminal of optical fiber splitter 33, the first output end a of the optical fiber splitter 33
It is connect with optical fiber circulator 34, the second output terminal b of the optical fiber splitter 33 is connect with data processing unit 31.
In embodiment still more preferably, the optical fiber circulator 34 is three fiber port circulators.
In the present invention, optical fiber splitter and optical fiber circulator are not specially limited, are can be used in the prior art
Common optical fiber equipment, such as: FLG-PLC1 × 8LG × 1SCA plane waveguide light shunt, PLC-102-AB-20-LCU-15 are flat
Surface wave leaded light splitter；Flyin-1310/1550 optical circulator, tri- fiber port circulator of Yhoptic-1310/1550nm.
Preferably, the optical fiber circulator includes first port A, second port B and third port C,
The first port A is connect as input terminal with the first output end a of optical fiber splitter 33, second port B and number
It is connected according to processing unit 31, third port C is connect with tested optical cable 15.
Wherein, the third port connecting with tested optical cable can permit the transmitting and reception of optical signal, to realize light
The detection and transmission of cable fault-signal.
In the present invention, the optical signal that the light source issues enters tested optical cable through optical fiber circulator, fault point
Reflected light is transmitted to optical fiber circulator through third port again.
According to a kind of preferred embodiment of the utility model, the light source 321 is ASE light source, including pumping source and is mixed
Doped fiber amplifier, the pumping source can be the semiconductor laser of wavelength 980nm or 1480nm.
In further preferred embodiment, the filter 322 is wavelength tunable filter, operating wavelength range
For 1530nm~1565nm.
Wherein, light source is connect with filter, the wavelength of output can be made to match with the operation wavelength of tested optical cable.
In embodiment still more preferably, the optical fiber splitter 33 be splitting ratio be 95:5 single ended input,
The optical fiber splitter of both-end output.
Wherein, the noise light that ASE light source issues is divided into intensity than the two-beam for 95:5 by the optical fiber splitter,
In, the noise light of the first output end output 95% is input to the tested optical cable of optical fiber circulator entrance as signal light, and second
The ASE noise light of output end output 5% enters the storage of data processing unit 31.
In the present invention, light source generates the light of predetermined wavelength through wave filter, is then divided by optical fiber splitter
Two parts, a part output to data processing unit 31 store, and another part enters tested optical cable by optical fiber circulator, and light passes
Transporting at the failure of tested optical cable (fracture) can reflect, and reflected light is exported via optical fiber circulator to data processing unit 31
Middle storage.
According to a kind of preferred embodiment of the utility model, the data processing unit 31 includes memory 311 and turns
Parallel operation 312,
Wherein, the memory 311 for reception optical fiber splitter and the optical signal of optical fiber circulator transmission and is sent out
It send to converter 312,
The converter 312 is for converting optical signal.
In further preferred embodiment, the memory uses ATmega328P chip.
In embodiment still more preferably, the converter 312 is photodetector, preferably indium gallium arsenic photoelectricity
Detector.
Wherein, the optical signal received is converted to electric signal by the converter, and transmits it to central processing unit
It is analyzed.
Preferably, the data processing unit 31 is connected to the network by wireless communication with central processing unit 2.
The specific work process of Cable's Fault detection positioning system described in the utility model is as described below: light power meter is adopted
The optical power for collecting tested optical cable issues abnormal signal for failure and stores to processor, and processor controls alarm and issues police
It reports, while abnormal signal being sent to the alarm receiving unit of central processing unit, and then be transmitted to main control unit；The master control
Unit carries out discriminatory analysis to abnormal signal, and the instruction for sending cut-in stand-by photoswitch and key light switch carries out optical cable switching, together
When send starting optical time domain reflectometer instruction, to abort situation carry out bigness scale；
At the same time, the light source in failure location unit generates the light of predetermined wavelength through wave filter, then passes through optical fiber
Splitter is divided into two parts, and a part output to data processing unit stores, and another part enters tested by optical fiber circulator
Optical cable, reflected light are exported via optical fiber circulator and are stored into data processing unit；Data processing unit is by the optical signal of storage
Data are converted to Electric signal processing, and then are transmitted to the information process unit in central processing unit, and information process unit will be adopted
The fault location information of collection generates data, and is transmitted to main control unit and carries out reprocessing analysis.
In the present invention, Cable's Fault is carried out simultaneously by optical cable monitoring unit and failure location unit bigness scale and
It is thin to survey, localization of fault precision can be effectively improved, and can be avoided the blind area of optical time domain reflectometer bigness scale, significantly improve optical cable
Fault removal efficiency.
In the description of the present invention, it should be noted that term " on ", "lower", "inner", "outside", "front", "rear" etc.
The orientation or positional relationship of instruction is to be merely for convenience of retouching based on the orientation or positional relationship under utility model works state
State the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with
Specific orientation construction and operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ",
" third ", " the 4th " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation "
" connected " " connection " should broadly understood, for example, it may be being fixedly connected, may be a detachable connection, or the connection of one
Commonly；It can be mechanical connection, be also possible to be electrically connected；It can be and be directly connected to, can also be indirectly connected with by intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
It combines preferred embodiment above the utility model is illustrated, but these embodiments are only models
Example property, only play the role of illustrative.On this basis, a variety of replacements and improvement can be carried out to the utility model, these
It each falls in the protection scope of the utility model.
Claims (10)
1. a kind of Cable's Fault monitoring and positioning system, which is characterized in that the system comprises optical cable monitoring units (1), centre
Unit (2) and failure location unit (3) are managed,
Wherein, the optical cable monitoring unit (1) includes light power monitoring measuring unit (11), optical time domain reflectometer (12), key light switch
(13), spare photoswitch (14), tested optical cable (15) and reserve cable (16),
The reserve cable (16) is sequentially connected spare photoswitch (14), optical time domain reflectometer (12) and light power monitoring measuring unit
(11), the tested optical cable (15) is sequentially connected key light switch (13), optical time domain reflectometer (12) and light power monitoring measuring unit
(11)；
The light power monitoring measuring unit (11) includes light power meter (111), alarm (112) and processor (113), the smooth function
Rate meter, alarm and processor electrical connection；
The optical cable monitoring unit (1) further includes running equipment monitor (17) and running environment monitor (18), the operation
Device monitor (17) is electric signal sensor, and the running environment monitor (18) includes temperature sensor and humidity sensor
Device；
The failure location unit (3) includes data processing unit (31), light emitting unit (32), optical fiber splitter (33) and light
Fine circulator (34),
The data processing unit (31) includes memory (311) and converter (312),
The light emitting unit (32) includes the light source (321) and filter (322) interconnected.
2. Cable's Fault monitoring and positioning system according to claim 1, which is characterized in that the light power meter (111) is
The OPM150 light power meter of Artifex, the processor (113) are MCU processor.
3. Cable's Fault monitoring and positioning system according to claim 1, which is characterized in that the central processing unit (2)
It is connected to the network by wireless communication with optical cable monitoring unit (1), the central processing unit (2) includes main control unit (21) and oneself
Dynamic switch unit (22),
The optical cable monitoring unit (1) by the Cable's Fault signal monitored by wireless communication network transmission to main control unit
(21), after main control unit (21) discriminatory analysis, switching command is sent to automatic switch unit (22).
4. Cable's Fault monitoring and positioning system according to claim 3, which is characterized in that the central processing unit (2)
For arm processor, the main control unit (21) uses AT91RM9200 chip, and the automatic switch unit (22) is that optical path is automatic
Switch.
5. Cable's Fault monitoring and positioning system according to claim 3, which is characterized in that the central processing unit (2)
It further include location information processing unit (23), the information that acquisition failure location unit (3) is sent, and it is transmitted to main control unit
(21) it is analyzed and processed.
6. Cable's Fault monitoring and positioning system according to claim 5, which is characterized in that the information process unit (23)
For oscillograph.
7. Cable's Fault monitoring and positioning system according to claim 1, which is characterized in that optical fiber splitter (33) packet
An input terminal and two output ends are included,
The filter (322) connect with the input terminal of optical fiber splitter (33), the first output of the optical fiber splitter (33)
End is connect with optical fiber circulator (34), and the second output terminal of the optical fiber splitter (33) is connect with data processing unit (31).
8. Cable's Fault monitoring and positioning system according to claim 7, which is characterized in that the optical fiber circulator (34) is
Three fiber port circulators.
9. Cable's Fault monitoring and positioning system according to claim 1, which is characterized in that the light source (321) is ASE light
Source,
The filter (322) is wavelength tunable filter, and operating wavelength range is 1530nm~1565nm.
10. Cable's Fault monitoring and positioning system according to claim 1, which is characterized in that the memory (311) uses
ATmega328P chip,
The converter (312) is photodetector.
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| CN201920510802.5U CN209545594U (en) | 2019-04-15 | 2019-04-15 | A kind of Cable's Fault monitoring and positioning system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884709A (en) * | 2020-07-20 | 2020-11-03 | 中铁第四勘察设计院集团有限公司 | Railway communication optical cable on-line monitoring system and method |
| CN112290997A (en) * | 2020-10-29 | 2021-01-29 | 国网辽宁省电力有限公司信息通信分公司 | Optical layer monitoring system and method for detecting optical fiber fault by using same |
| CN113098138A (en) * | 2021-05-08 | 2021-07-09 | 国网新疆电力有限公司喀什供电公司 | Device for monitoring optical fiber blocking and monitoring method thereof |
| JP7075536B1 (en) * | 2021-10-19 | 2022-05-25 | 国網新疆電力有限公司電力科学研究院 | Optical cable monitoring system with notification function |
-
2019
- 2019-04-15 CN CN201920510802.5U patent/CN209545594U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884709A (en) * | 2020-07-20 | 2020-11-03 | 中铁第四勘察设计院集团有限公司 | Railway communication optical cable on-line monitoring system and method |
| CN111884709B (en) * | 2020-07-20 | 2021-09-14 | 中铁第四勘察设计院集团有限公司 | Railway communication optical cable on-line monitoring system and method |
| CN112290997A (en) * | 2020-10-29 | 2021-01-29 | 国网辽宁省电力有限公司信息通信分公司 | Optical layer monitoring system and method for detecting optical fiber fault by using same |
| CN113098138A (en) * | 2021-05-08 | 2021-07-09 | 国网新疆电力有限公司喀什供电公司 | Device for monitoring optical fiber blocking and monitoring method thereof |
| JP7075536B1 (en) * | 2021-10-19 | 2022-05-25 | 国網新疆電力有限公司電力科学研究院 | Optical cable monitoring system with notification function |
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