CN112887017B - Positioning method and positioning system for optical cable connecting tower - Google Patents
Positioning method and positioning system for optical cable connecting tower Download PDFInfo
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- CN112887017B CN112887017B CN202110083377.8A CN202110083377A CN112887017B CN 112887017 B CN112887017 B CN 112887017B CN 202110083377 A CN202110083377 A CN 202110083377A CN 112887017 B CN112887017 B CN 112887017B
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- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
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Abstract
The application discloses a method for positioning an optical cable connection tower, which is realized based on Brillouin optical time domain reflection technology, and comprises the steps of firstly obtaining a basic Brillouin frequency shift curve of an optical cable to be measured, determining the welding point information of the connection tower of the optical cable to be measured by analyzing the obtained basic Brillouin frequency shift curve, then determining the optical cable length between adjacent optical cable connection towers and the optical cable length between the welding point and the test point of the connection tower according to the welding point information of the connection tower, and finally determining a tower information base of the line of the optical cable to be measured according to the determined optical cable length between the adjacent connection towers, the optical cable length between the welding point and the test point of the connection tower and the basic operation and maintenance data of the line of the optical cable to be measured, so as to realize the accurate positioning of the optical cable connection towers and the accurate measurement of the optical cable length between the optical cable connection towers, the method lays a foundation for efficiently and accurately determining the position of the fault point of the optical cable to be tested.
Description
Technical Field
The application relates to the technical field of power equipment, in particular to a positioning method and a positioning system for an optical cable connecting tower.
Background
In the operation and maintenance work of the power communication network, determining operation and maintenance information such as the position of a fault point of an optical cable is one of important links.
The current acquisition process for the fault point of the optical cable mainly comprises the following steps: the operation and maintenance personnel determine the approximate position range of the fault optical cable according to the distance between the test breakpoint and the test point and the comparison operation of the basic data of the line, wherein the approximate position range usually comprises an area of several kilometers or even more than ten kilometers, and then finally determine the fault position through manual on-site line patrol, box opening and fiber breaking retesting and other means. This fault location method is less efficient to handle.
Disclosure of Invention
In order to solve the technical problem, the application provides a positioning method and a positioning system for an optical cable connection tower so as to achieve the purpose of improving the positioning efficiency of a fault point.
In order to achieve the technical purpose, the embodiment of the application provides the following technical scheme:
a method for positioning an optical cable connection tower is realized based on Brillouin optical time domain reflection technology, and comprises the following steps:
acquiring a basic Brillouin frequency shift curve of the optical cable to be detected;
determining splicing point information of a splicing tower of the optical cable to be tested according to the basic Brillouin frequency shift curve;
determining the length of the optical cable between adjacent optical cable connecting towers and the length information of the optical cable between the connecting tower and the test point according to the connecting tower welding point information of the optical cable to be tested;
and determining a tower information base of the line where the optical cable to be detected is located according to the determined optical cable length between adjacent connecting towers, the optical cable length information of the splicing point and the test point of the connecting towers and the basic operation and maintenance information of the line where the optical cable to be detected is located.
Optionally, the acquiring a basic brillouin frequency shift curve of the optical cable to be tested includes:
acquiring the frequency difference between the incident light and the back Brillouin scattering light of the optical cable to be detected;
and acquiring a basic Brillouin frequency shift curve of the optical cable to be tested based on the frequency difference.
Optionally, the determining, according to the basic brillouin frequency shift curve, the splicing tower fusion point information of the optical cable to be tested includes:
determining a step point of the basic Brillouin frequency shift curve;
and determining the splicing tower fusion point information of the optical cable to be tested according to the determined step points.
Optionally, the basic operation and maintenance data at least includes: and the span, the tower number and the junction box information of the optical cable junction tower.
Optionally, after determining the tower information base of the line in which the optical cable to be detected is located according to the determined optical cable length between adjacent connection towers, the optical cable length information of the splicing tower fusion point and the test point, and the basic operation and maintenance information of the line in which the optical cable to be detected is located, the method further includes:
and based on the tower information base, combining the basic Brillouin frequency shift curve or the distance information between the fault point and the test point, checking basic data of a newly built/technically improved project or regularly checking and maintaining the information base or checking the running condition of the line or positioning the fault point.
A positioning system of an optical cable connection tower is realized based on Brillouin optical time domain reflection technology, and comprises:
the curve acquisition module is used for acquiring a basic Brillouin frequency shift curve of the optical cable to be detected;
the welding point acquisition module is used for determining the welding point information of the splicing tower of the optical cable to be tested according to the basic Brillouin frequency shift curve;
the length determining module is used for determining the optical cable length between adjacent optical cable connecting towers and the optical cable length information of the connecting tower welding point and the test point according to the connecting tower welding point information of the optical cable to be tested;
and the information base determining module is used for determining the tower information base of the line where the optical cable to be detected is located according to the determined optical cable length between adjacent connecting towers, the optical cable length information of the splicing point and the test point of the connecting towers and the basic operation and maintenance information of the line where the optical cable to be detected is located.
Optionally, the curve obtaining module is specifically configured to obtain a frequency difference between the incident light and the back brillouin scattered light of the optical cable to be measured;
and acquiring a basic Brillouin frequency shift curve of the optical cable to be tested based on the frequency difference.
Optionally, the welding point obtaining module is specifically configured to determine a step point of the basic brillouin frequency shift curve;
and determining the splicing tower fusion point information of the optical cable to be tested according to the determined step points.
Optionally, the basic operation and maintenance data at least includes: and the span, the tower number and the junction box information of the optical cable junction tower.
Optionally, the method further includes:
and the application module is used for checking the basic data of the newly-built/technically-improved engineering or checking and maintaining the information base regularly or checking the line running condition or positioning the fault point based on the tower information base by combining the basic Brillouin frequency shift curve or the distance information between the fault point and the test point.
It can be seen from the above technical solutions that the embodiments of the present application provide a positioning method and a positioning system for an optical cable connection tower, wherein the positioning method for the optical cable connection tower is implemented based on a brillouin optical time domain reflection technique, and the positioning method for the optical cable connection tower is implemented by first obtaining a basic brillouin frequency shift curve of an optical cable to be measured, and determining the welding point information of the connection tower of the optical cable to be measured by analyzing the obtained basic brillouin frequency shift curve, then determining the optical cable length between adjacent optical cable connection towers and the optical cable length between the welding points of the connection tower and the test point of the connection tower according to the welding point information of the connection tower, and finally determining a tower information base of the line where the optical cable to be measured is located according to the determined optical cable length between the adjacent connection towers, the optical cable length between the welding points of the connection towers and the test point and the basic operation and maintenance data of the line where the optical cable to be measured is located, the method and the device realize the accurate positioning of the optical cable connecting towers and the accurate measurement of the length of the optical cable to be measured between the optical cable connecting towers, and lay a foundation for efficiently and accurately determining the position of the fault point of the optical cable to be measured.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic flowchart of a method for positioning a cable splicing tower according to an embodiment of the present application;
fig. 2 is a schematic flow chart of a method for positioning a cable splicing tower according to another embodiment of the present application;
fig. 3 is a schematic flow chart of a method for positioning a cable splicing tower according to another embodiment of the present application;
fig. 4 is a schematic flow chart of a positioning method for a cable splicing tower according to still another embodiment of the present application.
Detailed Description
The line foundation operation and maintenance data and the actual operation physical position often have great difference in the operation and maintenance work of the power communication network, after the fault of an optical cable (OPGW) is accurately and quickly positioned, the corresponding specific fault position is difficult to find, and the main reasons for the problem include:
1. because OPGW optical cable sag hangs, optical fiber extra length, and the optical cable extra length is kept in construction and is difficult to determine and other factors influence, the actual length of the optical cable is far longer than the distance between towers. The span in the information table of the tower of the line is the distance between towers, so when the optical cable in transit is positioned by the information table of the tower, the difference from the actual physical position is great.
And 2, in the long-term operation process of the OPGW optical cable, the line basic data is stored in a manual drawing recording mode, and inaccurate optical cable line information is caused after the projects of line change, optical cable replacement connection and the like.
3. With the continuous improvement of the optical fiber fusion splicing technology, when the attenuation detection and the positioning of a splicing tower are performed by using a traditional OTDR (optical time-Domain Reflectometer), the fusion attenuation in a part of splicing boxes is close to zero or even negative, and it is difficult to position the splicing box and the corresponding tower through a large attenuation point.
4. In recent years, the number of OPGW optical cable faults of the power backbone communication network is in a remarkable trend, the average fault duration is long, the handling duration of various optical cable faults is the longest, and faults can occur in a junction box, a tower down lead or a tower top hardware clamp. According to statistics, more than 70% of faults occur near a connection tower, since OTDR is difficult to accurately judge the position of a connection point, the existing means is difficult to accurately position, in the actual maintenance process, operation and maintenance personnel are used for locking the position of a fault optical cable in an area of several kilometers or even more than ten kilometers according to the distance between a breakpoint and a test point obtained by OTDR testing and line basic data comparison calculation, the fault position is finally determined by means of manual on-site line patrol, box opening and fiber breaking retesting and the like, the fault positioning and handling efficiency is low, and the fault positioning and handling efficiency is greatly influenced for the stable operation of an optical communication network.
In view of this, an embodiment of the present application provides a method for positioning an optical cable connection tower, where the method for positioning an optical cable connection tower is implemented based on a brillouin optical time domain reflection technology, and includes obtaining a basic brillouin frequency shift curve of an optical cable to be measured, determining fusion point information of the connection tower of the optical cable to be measured by analyzing the obtained basic brillouin frequency shift curve, determining an optical cable length between adjacent optical cable connection towers and an optical cable length between the fusion point and the test point of the connection tower according to the fusion point information of the connection tower, determining an information base of a line where the optical cable to be measured is located according to the determined optical cable length between adjacent connection towers, the determined optical cable length between the fusion point and the test point of the connection tower, and the determined base operation and maintenance data of the line where the optical cable to be measured is located, so as to implement accurate positioning of the optical cable connection towers and accurate measurement of the optical cable connection towers, the method lays a foundation for efficiently and accurately determining the position of the fault point of the optical cable to be tested.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a method for positioning an optical cable connection tower, which is realized based on a Brillouin optical time domain reflection technology as shown in FIG. 1, and comprises the following steps:
s101: and acquiring a basic Brillouin frequency shift curve of the optical cable to be tested.
S102: and determining the splicing tower welding point information of the optical cable to be tested according to the basic Brillouin frequency shift curve.
In the basic Brillouin frequency shift curve, the abrupt change point or the step point usually represents the welding point position of the optical cable to be tested, and the welding point of the optical cable to be tested is usually the position of the splicing tower, so that the welding point information of the splicing tower of the optical cable to be tested can be determined according to the basic Brillouin frequency shift curve.
S103: and determining the length of the optical cable between adjacent optical cable connection towers and the length of the optical cable between the connection tower welding point and the test point according to the connection tower welding point information of the optical cable to be tested.
As described above, after the splicing tower fusion point information is determined in step S102, the cable length between adjacent cable splicing towers and the cable length between the splicing tower fusion point and the test point can be determined according to the two adjacent splicing tower fusion point information.
S104: and determining a tower information base of the line where the optical cable to be detected is located according to the determined optical cable length between adjacent connecting towers, the optical cable length between the splicing tower and the test point and the basic operation and maintenance information of the line where the optical cable to be detected is located.
In step S104, the basic operation and maintenance data at least includes: and the span, the tower number and the junction box information of the optical cable junction tower.
Specifically, the physical position information of the optical cable connection tower is determined according to the determined optical cable length between adjacent connection towers and the optical cable length between the splicing tower and the test point, and then the completion check is carried out according to the determined optical cable length between the adjacent connection towers, the optical cable length between the splicing tower and the test point and the physical position information of the optical cable connection tower by combining the tower number of the splicing box of the connection tower, the distance information in the optical cable to be detected and the optical cable length information, so that a tower information base of the line where the optical cable to be detected is located is constructed, and the accuracy, the integrity and the practicability of the optical cable line data to be detected are ensured.
After the tower information base of the line where the optical cable to be tested is located is determined, the position of a fault point can be quickly and accurately positioned according to the detected fault point information by combining the tower information base, the positioning efficiency of the fault point is improved, and adverse effects on an optical communication system caused by retesting means such as box opening and fiber breaking can be avoided.
A description is given below of possible implementation manners of each step of the positioning method for an optical cable connection tower provided in the embodiment of the present application.
On the basis of the foregoing embodiment, in an embodiment of the present application, as shown in fig. 2, the acquiring a basic brillouin frequency shift curve of an optical cable to be tested includes:
s1011: acquiring the frequency difference between the incident light and the back Brillouin scattering light of the optical cable to be detected;
s1012: and acquiring a basic Brillouin frequency shift curve of the optical cable to be tested based on the frequency difference.
In this embodiment, a BOTDR technique is used to detect a frequency difference between incident light and backward brillouin scattered light in an optical fiber of an optical cable to be measured, and obtain an optical fiber brillouin shift curve.
On the basis of the foregoing embodiment, in another embodiment of the present application, as shown in fig. 3, the determining, according to the basic brillouin frequency shift curve, splicing tower fusion point information of the optical cable to be tested includes:
s1031: determining a step point of the basic Brillouin frequency shift curve;
s1032: and determining the splicing tower fusion point information of the optical cable to be tested according to the determined step points.
In this embodiment, the determination of the welding point information of the connection tower is realized by detecting the step points. Specifically, when the basic brillouin frequency shift curve is subjected to spike-shaped abnormality without external force and temperature, the basic brillouin frequency shift curve is the basic brillouin frequency shift curve of the optical fiber, and normally, a tower down lead is not stressed, and the temperature influence effect is weak. The optical fiber formed by putting the prefabricated rods of different types, different materials and different batches into the optical fiber drawing tower for drawing has different basic Brillouin frequency shifts, and the special physical phenomenon in the production and the manufacturing of the optical fiber can clearly detect that the Brillouin frequency shift curve of the optical fiber base is in step jump change, and the jump point (or called jump point) is the optical fiber welding point of the optical cable connecting tower. In actual operation, the fiber cores of the OPGW optical cables of the whole communication line are formed by welding optical fibers of different batches, so that the basic Brillouin frequency shift curve presents obvious step change by detection through a BOTDR technology, and the positioning of the OPGW optical cable connecting pole tower can be realized by using the method through practice verification.
On the basis of the foregoing embodiment, in another embodiment of the present application, as shown in fig. 4, after determining the tower information base of the line in which the optical cable to be detected is located according to the determined length of the optical cable between adjacent connection towers, the determined lengths of the optical cables between the splicing points of the connection towers and the test points, and the base operation and maintenance information of the line in which the optical cable to be detected is located, the method further includes:
s105: and based on the tower information base, combining the basic Brillouin frequency shift curve or the distance information between the fault point and the test point, checking basic data of a newly built/technically improved project or regularly checking and maintaining the information base or checking the running condition of the line or positioning the fault point.
In step S105, the distance information between the fault point and the test point may be obtained by performing a test with an Optical Time Domain Reflectometer (OTDR).
Specifically, scenario 1: the checking of the basic data of the new construction/technical improvement project comprises the following steps:
the basic operation and maintenance data of the newly-built project does not contain optical cable length information among towers at all levels, and meanwhile, due to optical cable sag, optical fiber extra length and the like, accurate optical cable length information data corresponding to the circuit towers does not exist. The technical improvement engineering mainly comprises the steps of optimizing and adjusting the communication network frame structure, moving and modifying the line and the like, so that the line corridor is changed, and the basic operation and maintenance data of the line are greatly changed. After the maintenance, the operation and maintenance personnel replace the operation and maintenance basic data of the line transfer and change section, and the integrity and the accuracy of the operation and maintenance basic data cannot be ensured for the whole communication line. In the application scene, the information of the whole communication line is preferably complemented and checked by combining engineering design data, acceptance test (OTDR test), operation and maintenance basic data and OTDR detection data, so that the accuracy and integrity of the operation and maintenance data of the line are ensured.
The specific steps and logic relationship are as follows: basic operation and maintenance data and BOTDR detection data (basic Brillouin frequency shift curves) are input, and an accurate optical cable line tower information base is formed after analysis and processing.
Scene 2: the regular checking and maintaining of the information base comprises the following steps:
in the long-term operation process of the electric OPGW optical cable, the electric OPGW optical cable is inevitably subjected to extreme weather influences such as wind sand, ice coating, lightning stroke and the like, and meanwhile, stress change is caused by high-altitude suspension, so that the maintenance work of the optical cable needs to be regularly carried out, even the optical cable needs to be replaced, and therefore the maintenance of an optical cable line tower information base needs to be regularly carried out, and the accuracy of the optical cable line tower information base is ensured. In the application scene, the checking and maintenance of the optical cable line tower information base can be regularly carried out by combining the line basic operation and maintenance data and the BOTDR detection data.
The specific steps and logical relations are the same as those of the scenario 1.
Scene 3: the line operation condition inspection comprises the following steps:
the power communication network regularly carries out line operation condition routing inspection in spring and autumn every year, and the OTDR is used for carrying out attenuation and positioning detection on the line so as to check the quality of an optical cable fiber core, and for points with large attenuation, risk potential danger elimination is carried out in advance, so that the fiber core degradation fault rate is reduced. In the application scene, the line distance information with large attenuation points detected by the OTDR can be used as an input data set, an optical cable line tower information base is compared, the line operation current situation in the actual physical position is mastered, the early warning purpose is achieved, and meanwhile, technical scheme support and guidance functions are provided for attenuation increase reason analysis and hidden danger elimination.
The specific steps and logic relationship are as follows: inputting OTDR detection data (basic Brillouin frequency shift curve), acquiring line distance data of a point to be inquired, namely the kilometer number of the point to be inquired from a test point, comparing and analyzing the line distance data of the point to be inquired with a tower information base of a line in which an optical cable to be tested is located, locating a tower or a continuous tower in which the point to be inquired is located and distance information of a welding point of the optical cable to be inquired and the continuous tower, and outputting information of an optical cable fault point and an actual relative position of the optical cable to the tower.
Scene 4: the fault point positioning comprises the following steps:
after the OPGW optical cable breaks down, because the actual physical position of the optical cable connecting tower in the line is different from the tower information table, the distance information between the fault point and the test point obtained by the OTDR test cannot be passed, the quick and accurate positioning of the fault point is realized, and the fault positioning and disposal efficiency is reduced. In the application scenario, the distance between the fault point detected by the OTDR and the test point is input, the distance between the fault point and the welding point of the connecting tower is calculated, the accurate physical position of the fault point is quickly output, and the quick and accurate positioning and analysis of the fault point of the OPGW optical cable are realized.
The specific steps and logical relationships are the same as those in scenario 3.
The positioning system for the optical cable connection tower provided in the embodiment of the present application is described below, and the positioning system for the optical cable connection tower described below may be referred to in correspondence with the positioning method for the optical cable connection tower described above.
Correspondingly, the embodiment of the application provides a positioning system for an optical cable connection tower, which is realized based on a brillouin optical time domain reflection technology, and comprises:
the curve acquisition module is used for acquiring a basic Brillouin frequency shift curve of the optical cable to be detected;
the welding point acquisition module is used for determining the welding point information of the splicing tower of the optical cable to be tested according to the basic Brillouin frequency shift curve;
in the basic Brillouin frequency shift curve, the abrupt change point or the step point usually represents the welding point position of the optical cable to be tested, and the welding point of the optical cable to be tested is usually the position of the splicing tower, so that the welding point information of the splicing tower of the optical cable to be tested can be determined according to the basic Brillouin frequency shift curve.
The length determining module is used for determining the length of the optical cable between adjacent optical cable connecting towers according to the information of the connecting tower fusion point of the optical cable to be detected;
as described above, after the welding point information of the splicing towers is determined in the welding point acquisition module, the length of the optical cable between the adjacent optical cable splicing towers can be determined according to the welding point information of the two adjacent splicing towers.
And the information base determining module is used for determining the tower information base of the line where the optical cable to be detected is located according to the determined optical cable length between the adjacent continuous towers and the basic operation and maintenance information of the line where the optical cable to be detected is located.
In the information base determining module, the basic operation and maintenance data at least comprises: and the span, the tower number and the junction box information of the optical cable junction tower.
Specifically, the physical position information of the optical cable connecting towers is determined according to the determined optical cable length between the adjacent connecting towers, and then the optical cable length between the adjacent connecting towers and the physical position information of the optical cable connecting towers are combined with the tower number of the connecting box of the connecting towers, the distance information in the optical cable to be detected and the optical cable length information and the like to perform alignment checking, so that a tower information base of the line where the optical cable to be detected is located is constructed, and the accuracy, integrity and practicability of the optical cable line data to be detected are guaranteed.
After the tower information base of the line where the optical cable to be tested is located is determined, the position of a fault point can be quickly and accurately positioned according to the detected fault point information by combining the tower information base, the positioning efficiency of the fault point is improved, and adverse effects on an optical communication system caused by retesting means such as box opening and fiber breaking can be avoided.
Optionally, the curve obtaining module is specifically configured to obtain a frequency difference between the incident light and the back brillouin scattered light of the optical cable to be measured;
and acquiring a basic Brillouin frequency shift curve of the optical cable to be tested based on the frequency difference.
In this embodiment, a BOTDR technique is used to detect a frequency difference between incident light and backward brillouin scattered light in an optical fiber of an optical cable to be measured, and obtain an optical fiber brillouin shift curve.
Optionally, the welding point obtaining module is specifically configured to determine a step point of the basic brillouin frequency shift curve;
and determining the splicing tower fusion point information of the optical cable to be tested according to the determined step points.
In the embodiment, the information of the welding points of the connecting tower is determined by detecting the stage points. Specifically, when the basic brillouin frequency shift curve is subjected to spike-shaped abnormality without external force and temperature, the basic brillouin frequency shift curve is the basic brillouin frequency shift curve of the optical fiber, and normally, a tower down lead is not stressed, and the temperature influence effect is weak. The optical fiber formed by putting the prefabricated rods of different types, different materials and different batches into the optical fiber drawing tower for drawing has different basic Brillouin frequency shifts, and the special physical phenomenon in the production and the manufacturing of the optical fiber can clearly detect that the Brillouin frequency shift curve of the optical fiber base is in step jump change, and the jump point (or called jump point) is the optical fiber welding point of the optical cable connecting tower. In actual operation, the fiber cores of the OPGW optical cables of the whole communication line are formed by welding optical fibers of different batches, so that the basic Brillouin frequency shift curve presents obvious step change by detection through a BOTDR technology, and the positioning of the OPGW optical cable connecting pole tower can be realized by using the method through practice verification.
Optionally, the positioning system of the optical cable splicing tower further includes:
and the application module is used for checking the basic data of the newly-built/technically-improved engineering or checking and maintaining the information base regularly or checking the line running condition or positioning the fault point based on the tower information base by combining the basic Brillouin frequency shift curve or the distance information between the fault point and the test point.
Specifically, scenario 1: the checking of the basic data of the new construction/technical improvement project comprises the following steps:
the basic operation and maintenance data of the newly-built project does not contain optical cable length information among towers at all levels, and meanwhile, due to optical cable sag, optical fiber extra length and the like, accurate optical cable length information data corresponding to the circuit towers does not exist. The technical improvement engineering mainly comprises the steps of optimizing and adjusting the communication network frame structure, moving and modifying the line and the like, so that the line corridor is changed, and the basic operation and maintenance data of the line are greatly changed. After the maintenance, the operation and maintenance personnel replace the operation and maintenance basic data of the line transfer and change section, and the integrity and the accuracy of the operation and maintenance basic data cannot be ensured for the whole communication line. In the application scene, the information of the whole communication line is preferably complemented and checked by combining engineering design data, acceptance test (OTDR test), operation and maintenance basic data and OTDR detection data, so that the accuracy and integrity of the operation and maintenance data of the line are ensured.
The specific steps and logic relationship are as follows: basic operation and maintenance data and BOTDR detection data (basic Brillouin frequency shift curves) are input, and an accurate optical cable line tower information base is formed after analysis and processing.
Scene 2: the regular checking and maintaining of the information base comprises the following steps:
in the long-term operation process of the electric OPGW optical cable, the electric OPGW optical cable is inevitably subjected to extreme weather influences such as wind sand, ice coating, lightning stroke and the like, and meanwhile, stress change is caused by high-altitude suspension, so that the maintenance work of the optical cable needs to be regularly carried out, even the optical cable needs to be replaced, and therefore the maintenance of an optical cable line tower information base needs to be regularly carried out, and the accuracy of the optical cable line tower information base is ensured. In the application scene, the checking and maintenance of the optical cable line tower information base can be regularly carried out by combining the line basic operation and maintenance data and the BOTDR detection data.
The specific steps and logical relations are the same as those of the scenario 1.
Scene 3: the line operation condition inspection comprises the following steps:
the power communication network regularly carries out line operation condition routing inspection in spring and autumn every year, and the OTDR is used for carrying out attenuation and positioning detection on the line so as to check the quality of an optical cable fiber core, and for points with large attenuation, risk potential danger elimination is carried out in advance, so that the fiber core degradation fault rate is reduced. In the application scene, the line distance information with large attenuation points detected by the OTDR can be used as an input data set, an optical cable line tower information base is compared, the line operation current situation in the actual physical position is mastered, the early warning purpose is achieved, and meanwhile, technical scheme support and guidance functions are provided for attenuation increase reason analysis and hidden danger elimination.
The specific steps and logic relationship are as follows: inputting OTDR detection data (namely distance information between a fault point and a test point), acquiring line distance data of a point to be inquired, namely the kilometer number of the point to be inquired from the test point, comparing and analyzing the line distance data of the point to be inquired and a tower information base of a line in which an optical cable to be tested is positioned, positioning a tower or a continuous tower in which the point to be inquired is positioned and distance information of a welding point of the optical cable to be inquired and the continuous tower, and outputting information of the actual relative position of the optical cable fault point and the tower.
Scene 4: the fault point positioning comprises the following steps:
after the OPGW optical cable breaks down, because the actual physical position of the optical cable connecting tower in the line is different from the tower information table, the distance information between the fault point and the test point obtained by the OTDR test cannot be passed, the quick and accurate positioning of the fault point is realized, and the fault positioning and disposal efficiency is reduced. In the application scenario, the line distance between the fault point detected by the OTDR and the test point is input and compared with the optical cable line tower information base, the distance between the fault point and the splicing tower fusion point is calculated, the accurate physical position of the fault point is rapidly output, and the rapid and accurate positioning and analysis of the fault point of the OPGW optical cable are realized.
The specific steps and logical relationships are the same as those in scenario 3.
In summary, the embodiments of the present application provide a positioning method and a positioning system for an optical cable connection tower, wherein the positioning method for the optical cable connection tower is implemented based on a brillouin optical time domain reflection technique, and includes first obtaining a basic brillouin frequency shift curve of an optical cable to be tested, determining the welding point information of the connection tower of the optical cable to be tested by analyzing the obtained basic brillouin frequency shift curve, then determining the length of the optical cable between adjacent optical cable connection towers and the length of the optical cable between the welding point and the test point of the connection tower according to the welding point information of the connection tower, and finally determining a tower information base of a line where the optical cable to be tested is located according to the determined length of the optical cable between the adjacent connection towers, the length of the optical cable between the welding point and the test point of the connection tower, and the basic operation and maintenance information of the line where the optical cable to be tested is located, so as to implement accurate positioning of the optical cable connection tower and accurate measurement of the length of the optical cable to be tested between the connection towers, the method lays a foundation for efficiently and accurately determining the position of the fault point of the optical cable to be tested.
Features described in the embodiments in the present specification may be replaced with or combined with each other, each embodiment is described with a focus on differences from other embodiments, and the same and similar portions among the embodiments may be referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A method for positioning an optical cable connection tower is realized based on Brillouin optical time domain reflection technology, and comprises the following steps:
acquiring a basic Brillouin frequency shift curve of the optical cable to be detected;
determining splicing point information of a splicing tower of the optical cable to be tested according to the basic Brillouin frequency shift curve;
determining the length of the optical cable between adjacent optical cable connecting towers and the length information of the optical cable between the connecting tower and the test point according to the connecting tower welding point information of the optical cable to be tested;
determining a tower information base of a line where the optical cable to be detected is located according to the determined optical cable length between adjacent connecting towers, the optical cable length information of the splicing point and the test point of the connecting towers and the basic operation and maintenance information of the line where the optical cable to be detected is located;
and based on the tower information base, combining the basic Brillouin frequency shift curve or the distance information between the fault point and the test point, checking basic data of a newly built/technically improved project or regularly checking and maintaining the information base or checking the running condition of the line or positioning the fault point.
2. The method of claim 1, wherein the obtaining the base brillouin frequency shift curve of the optical cable under test comprises:
acquiring the frequency difference between the incident light and the back Brillouin scattering light of the optical cable to be detected;
and acquiring a basic Brillouin frequency shift curve of the optical cable to be tested based on the frequency difference.
3. The method according to claim 1, wherein the determining of the splicing tower fusion point information of the optical cable to be tested according to the basic Brillouin frequency shift curve comprises:
determining a step point of the basic Brillouin frequency shift curve;
and determining the splicing tower fusion point information of the optical cable to be tested according to the determined step points.
4. The method of claim 1, wherein the base operation and maintenance data comprises at least: and the span, the tower number and the junction box information of the optical cable junction tower.
5. A positioning system of an optical cable connection tower is realized based on Brillouin optical time domain reflection technology, and comprises:
the curve acquisition module is used for acquiring a basic Brillouin frequency shift curve of the optical cable to be detected;
the welding point acquisition module is used for determining the welding point information of the splicing tower of the optical cable to be tested according to the basic Brillouin frequency shift curve;
the length determining module is used for determining the optical cable length between adjacent optical cable connecting towers and the optical cable length information of the connecting tower welding point and the test point according to the connecting tower welding point information of the optical cable to be tested;
the information base determining module is used for determining a tower information base of the line where the optical cable to be detected is located according to the determined optical cable length between adjacent connecting towers, the optical cable length information of the splicing tower welding point and the test point and the basic operation and maintenance information of the line where the optical cable to be detected is located;
and the application module is used for checking the basic data of the newly-built/technically-improved engineering or checking and maintaining the information base regularly or checking the line running condition or positioning the fault point based on the tower information base by combining the basic Brillouin frequency shift curve or the distance information between the fault point and the test point.
6. The system according to claim 5, wherein the curve obtaining module is specifically configured to obtain a frequency difference between the incident light and the backward brillouin scattered light of the optical cable to be measured;
and acquiring a basic Brillouin frequency shift curve of the optical cable to be tested based on the frequency difference.
7. The system according to claim 5, wherein the fusion point acquisition module is specifically configured to determine a step point of the basic Brillouin frequency shift curve;
and determining the splicing tower fusion point information of the optical cable to be tested according to the determined step points.
8. The system of claim 5, wherein the base operation and maintenance data comprises at least: and the span, the tower number and the junction box information of the optical cable junction tower.
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| CN114039656B (en) * | 2021-10-13 | 2023-04-25 | 哈尔滨工业大学 | OPGW fault positioning method and device based on BOTDR and OTDR |
| CN114374430A (en) * | 2021-12-09 | 2022-04-19 | 广西电网有限责任公司钦州供电局 | Method for identifying coordinate position of fault tower and determining position of fault point of optical cable |
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