CN220171628U - Optical fiber vibration sensing device and early warning device - Google Patents
Optical fiber vibration sensing device and early warning device Download PDFInfo
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- CN220171628U CN220171628U CN202321955610.8U CN202321955610U CN220171628U CN 220171628 U CN220171628 U CN 220171628U CN 202321955610 U CN202321955610 U CN 202321955610U CN 220171628 U CN220171628 U CN 220171628U
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Abstract
The utility model belongs to the field of optical fiber communication, and particularly relates to an optical fiber vibration sensing device and an early warning device. The optical fiber vibration sensing device comprises a fixed wavelength laser, an adjustable wavelength laser and a coupler; the coherent light emitted by the fixed wavelength laser and the adjustable wavelength laser enters the coupler, and the coherent light is coupled by the coupler and then is input into an optical signal for inputting an optical fiber. The sensing device can be used for monitoring the optical fiber, and plays a role in improving the safety of the optical fiber.
Description
Technical Field
The utility model belongs to the field of optical fiber communication, and particularly relates to an optical fiber vibration sensing device and an early warning device.
Background
The advantages of long transmission distance, high transmission speed and low loss of optical fiber communication make the optical fiber communication a main communication mode, and with the exposure of some network security events, the optical fiber communication is at risk of illegal data theft. At any position of the transmission optical cable, the optical cable sheath is opened, the information can be read by bending the optical cable, and the loss of the bent optical fiber is very small and cannot influence normal communication, so that the optical cable is difficult to find. The distributed optical fiber vibration sensor with high transmission rate has the advantages of large monitoring range, long distance, continuous and real-time online monitoring, is an important research direction of the optical fiber vibration sensor technology, and can realize the safety early warning of long-distance and large-range optical fiber special networks by adopting an intelligent vibration mode identification method, so that the technology is widely applied to the safety protection of optical fiber communication networks such as oil gas pipelines, electric power pipelines, telecommunication operators backbone networks and the like.
Fiber optic cables are the most predominant physical carrier for data transmission in power system communication networks, including conduit fiber optic cables, OPGW, ADSS, OPPC, and the like. The important power grid dispatching center is characterized in that the communication convergence exchange station is mainly located in an urban center, and the overhead lines affecting urban capacity are not allowed to be erected in urban construction, so that communication can be carried out only through pipeline optical cables. The electric pipeline is mostly positioned at two sides of the road, the burying depth is about 1-2 meters, and the electric pipeline is extremely easy to be damaged by external force such as violent construction, illegal theft and digging. At present, the power cable fault positioning method generally adopts an impedance method, a voltage comparison method, a bridge method and a traveling wave reflection method as the basis to perform fault positioning. The lack of a direct monitoring system for the optical cable can only determine the failure of the optical cable by the operation of the transmission equipment or the service system to which the optical cable is connected. When an optical cable fails, the OTDR is used for breakpoint detection, then an maintainer is dispatched to the site for checking, and the optical cable is repaired.
In view of this, the present utility model has been made.
Disclosure of Invention
In order to solve the technical problems in the prior art, the utility model provides an optical fiber vibration sensing device, an early warning device and an early warning method.
The utility model comprises the following technical scheme:
the utility model provides an optical fiber vibration sensing device, which comprises a fixed wavelength laser, an adjustable wavelength laser and a coupler;
the coherent light emitted by the fixed wavelength laser and the adjustable wavelength laser enters the coupler, and the coherent light is coupled by the coupler and then is input into the input end of the optical fiber.
Further, the optical fiber also comprises an amplifier for amplifying the two paths of coherent light.
Further, the length of the optical fiber is 60KM to 160KM.
Further, the output end of the optical fiber is connected with an amplifier.
The utility model also provides an optical fiber vibration early warning device, which comprises the sensing device, a starting point sensing box, an end point sensing box and a system host, wherein the optical signals after being coupled by the coupler are input into the input end of the optical fiber through the starting point sensing box, the output end of the optical fiber outputs optical wave signals, and the optical wave signals are sent to the system host through the end point sensing box.
Further, the system host includes:
and a receiving module: the optical fiber receiving terminal is used for receiving the optical wave signal output by the terminal optical fiber output end;
a database module: for storing event library waveforms;
the processing module is used for: the method is used for comparing the light wave signals received by the receiving module with waveforms of the event library to obtain events;
and the early warning module is used for: and the early warning module is used for early warning the event obtained by the processing module.
Further, the event library waveforms comprise early warning accident waveforms and non-early warning accident waveforms; therefore, the early warning module carries out early warning on the event corresponding to the early warning accident waveform, and the early warning module does not carry out early warning on the event not corresponding to the early warning accident waveform.
Further, the early warning mode of the early warning module comprises the step of sending the event to a display screen.
Further, the early warning mode of the early warning module comprises the step of sending the event to the operation and maintenance terminal.
By adopting the technical scheme, the utility model has the following advantages:
1. the sensing device can be used for monitoring the optical fiber, and plays a role in improving the safety of the optical fiber.
2. The early warning device can monitor the operation condition of the optical fiber in real time, and can early warn the fault or accident of the optical fiber so as to achieve the purpose of providing the safety and the use stability of the optical fiber even if the fault or accident is processed.
3. The early warning accident waveform and the non-early warning accident waveform provided by the utility model can filter out natural noise and normal events such as wind, rain, lightning and the like, avoid false early warning, improve the accuracy of early warning and have the false alarm rate of less than 1%.
4. The early warning device has the advantages of simple structure, low cost and easiness in manufacturing and installation.
5. The utility model can effectively early warn the faults or accidents of the optical fibers and can avoid serious power grid accidents.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an optical fiber vibration sensor according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of an optical fiber vibration pre-warning device according to an embodiment of the present utility model;
in the accompanying drawings: 10-fixed wavelength laser, 20-adjustable wavelength laser, 30-coupler, 40-amplifier, 50-optical fiber, 60-system host, 70-start point sensing box and 80-end point sensing box.
Detailed Description
The following description provides many different embodiments, or examples, for implementing different features of the utility model. The elements and arrangements described in the following specific examples are presented for purposes of brevity and are provided only as examples and are not intended to limit the utility model.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The present embodiment provides an optical fiber vibration sensing device, as shown in fig. 1, including a fixed wavelength laser 10, an adjustable wavelength laser 20, and a coupler 30;
the coherent light emitted by the fixed wavelength laser 10 and the tunable wavelength laser 20 enters the coupler 30, and the coherent light is coupled out by the coupler 30 for inputting the optical signal of the optical fiber 50.
Further, an amplifier 40 is further included, and the amplifier 40 is configured to amplify two coherent light beams.
Further, the length of the optical fiber 50 is 60KM to 160KM. Under the condition of no amplifier 40, 60-80 KM can be accurately monitored, and the optical fiber 50 with the length of 60-160 KM can be accurately monitored by the amplifier 40, and the optical fiber 50 exceeding 160KM can also be monitored, but has the problem of low accuracy.
Further, the output end of the optical fiber 50 is connected to an amplifier 40.
It should be noted that fig. 1 and fig. 2 show the use positions of the two kinds of amplifiers 40, respectively, and of course, the amplifiers 40 in fig. 1 and fig. 2 may be provided at the same time, or only one of them may be provided.
By using the amplifier 40, there is the advantage of monitoring the longer fiber 50.
The embodiment also provides an optical fiber vibration early warning device, as shown in fig. 2, which comprises the sensing device, the starting point sensing box 70, the end point sensing box 80 and the system host 60, wherein the optical signal after the coupling of the coupler 30 is input into the input end of the optical fiber 50 through the starting point sensing box 70, the output end of the optical fiber 50 outputs an optical wave signal, and the optical wave signal is sent to the system host 60 through the end point sensing box 80.
Further, the system host 60 includes:
and a receiving module: the output end of the receiving terminal optical fiber 50 outputs an optical wave signal;
a database module: for storing event library waveforms;
the processing module is used for: the method is used for comparing the light wave signals received by the receiving module with waveforms of the event library to obtain events;
and the early warning module is used for: and the early warning module is used for early warning the event obtained by the processing module.
Further, the event library waveforms comprise early warning accident waveforms and non-early warning accident waveforms; therefore, the early warning module carries out early warning on the event corresponding to the early warning accident waveform, and the early warning module does not carry out early warning on the event not corresponding to the early warning accident waveform.
Specific: the early warning accident waveform includes waveforms affecting the optical fiber 50, such as touching the optical fiber 50, drilling tool operation, etc.
The non-early warning time waveform includes: waveform after the influence of wind, rain, lightning, normal event, etc. on the optical fiber 50. Normal events such as the fiber 50 crossing the road, often the passage of a car, can have an impact on the waveform shaping.
Further, the early warning mode of the early warning module comprises the step of sending the event to a display screen.
Further, the early warning mode of the early warning module comprises the step of sending the event to the operation and maintenance terminal.
The sensing device of the utility model has the advantages that the light emitted by the wavelength-tunable laser which emits a beam of light and has a small deviation with the wavelength of the light enters the coupler 30 for coupling, the coherent light is input into the optical fiber 50 after being obtained, when the optical fiber 50 vibrates, the amplitude and the frequency of the light wave of the optical signal are changed along with the vibration of the optical fiber 50, and whether the optical fiber 50 is in a fault or an accident is judged according to the conversion, so that the early warning is carried out.
Although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (9)
1. An optical fiber vibration sensing device is characterized by comprising a fixed wavelength laser (10), an adjustable wavelength laser (20) and a coupler (30);
the coherent light emitted by the fixed wavelength laser (10) and the adjustable wavelength laser (20) enters the coupler (30), and the coherent light is coupled by the coupler (30) and then is output to be used for inputting optical signals of the optical fiber (50).
2. A fibre optic vibration sensing device according to claim 1, further comprising an amplifier (40), the amplifier (40) being arranged to amplify two paths of coherent light.
3. An optical fiber vibration sensing device according to claim 2, characterized in that the length of the optical fiber (50) is 60KM to 160KM.
4. An optical fiber vibration sensing device according to claim 2, characterized in that the output end of the optical fiber (50) is connected to an amplifier (40).
5. An optical fiber vibration early warning device, characterized by comprising a sensing device, a starting point sensing box (70), an end point sensing box (80) and a system host (60) according to any one of claims 1-4, wherein an optical signal after coupling of a coupler (30) is input into an input end of an optical fiber (50) through the starting point sensing box (70), an optical wave signal is output from an output end of the optical fiber (50), and the optical wave signal is sent to the system host (60) through the end point sensing box (80).
6. The optical fiber vibration pre-warning device according to claim 5, characterized in that,
the system host (60) includes:
and a receiving module: the optical fiber is used for receiving the output end of the terminal optical fiber (50) and outputting an optical wave signal;
a database module: for storing event library waveforms;
the processing module is used for: the method is used for comparing the light wave signals received by the receiving module with waveforms of the event library to obtain events;
and the early warning module is used for: and the early warning module is used for early warning the event obtained by the processing module.
7. The optical fiber vibration pre-warning device according to claim 6, characterized in that,
the event library waveforms comprise early warning accident waveforms and non-early warning accident waveforms; therefore, the early warning module carries out early warning on the event corresponding to the early warning accident waveform, and the early warning module does not carry out early warning on the event not corresponding to the early warning accident waveform.
8. The fiber vibration pre-warning device according to claim 6, wherein the pre-warning mode of the pre-warning module comprises sending an event to a display screen.
9. The fiber vibration pre-warning device according to claim 6, wherein the pre-warning mode of the pre-warning module comprises sending an event to the operation terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321955610.8U CN220171628U (en) | 2023-07-24 | 2023-07-24 | Optical fiber vibration sensing device and early warning device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321955610.8U CN220171628U (en) | 2023-07-24 | 2023-07-24 | Optical fiber vibration sensing device and early warning device |
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| Publication Number | Publication Date |
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| CN220171628U true CN220171628U (en) | 2023-12-12 |
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| CN202321955610.8U Active CN220171628U (en) | 2023-07-24 | 2023-07-24 | Optical fiber vibration sensing device and early warning device |
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- 2023-07-24 CN CN202321955610.8U patent/CN220171628U/en active Active
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