CN114157348B - Optical cable fault point positioning method - Google Patents
Optical cable fault point positioning method Download PDFInfo
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- CN114157348B CN114157348B CN202111401127.0A CN202111401127A CN114157348B CN 114157348 B CN114157348 B CN 114157348B CN 202111401127 A CN202111401127 A CN 202111401127A CN 114157348 B CN114157348 B CN 114157348B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
- G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0791—Fault location on the transmission path
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Abstract
The invention relates to the technical field of electric power communication, and discloses an optical cable fault point positioning method. By reducing the search range of the fault point to the target geographical range, the difficulty of searching the fault point is greatly reduced, the time for searching the fault point is reduced, and the optical cable is beneficial to rapid repair.
Description
Technical Field
The invention relates to the technical field of power communication, in particular to a method for positioning a fault point of an optical cable.
Background
The optical cable is widely applied to an electric power communication system, and communication optical cable maintenance is important work in electric power system maintenance. Communication cables are often damaged due to construction, natural disasters and the like. After the communication optical cable is damaged, the communication optical cable needs to be repaired as soon as possible, otherwise, the operation of the power system is possibly influenced.
After the communication optical cable is damaged, the optical time domain reflectometer can be connected to the access end of the optical cable, and the optical cable length between the fault point and the access end of the optical cable can be detected through the optical time domain reflectometer. However, the specific geographical location of the cable is difficult to ascertain due to bending, turning, etc. of the cable. That is, it is difficult to accurately obtain the specific geographical position of the fault point only according to the length of the optical cable between the fault point and the access end of the optical cable, and the straight line error between the position of the located fault point and the actual position of the fault point may even reach 2 km in some cases. This greatly reduces the speed of rush-repair of the cable.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for positioning a fault point of an optical cable.
Another object of the present invention is to provide a method.
The embodiment of the invention is realized by the following technical scheme:
the optical cable fault point positioning method comprises the following steps:
step 1, selecting a plurality of reference points on a target optical cable, recording geographic coordinates of the reference points, and recording the length of the optical cable between the reference points and an access end of the target optical cable;
step 2, obtaining the optical cable length between the fault point of the target optical cable and the access end of the target optical cable through the optical time domain reflectometer;
step 3, selecting two reference points positioned at two sides of the fault point according to the length of the optical cable between the optical cable and the access end of the target optical cable, and respectively calling the two reference points positioned at two sides of the fault point as a first reference point and a second reference point;
step 4, drawing a target geographical range containing a fault point on a map according to the geographical coordinates of the first reference point, the geographical coordinates of the second reference point, the optical cable length between the first reference point and the access end of the target optical cable, the optical cable length between the second reference point and the access end of the target optical cable and the optical cable length between the fault point and the access end of the target optical cable;
and 5, searching a fault point according to the target geographic range.
Further, step 4 specifically includes:
step 4.1, drawing a range covered by all possible extending tracks of the optical cable between the first reference point and the second reference point on a map according to the geographic coordinates of the first reference point, the geographic coordinates of the second reference point, the optical cable length between the first reference point and the access end of the target optical cable and the optical cable length between the second reference point and the access end of the target optical cable, wherein the range is a track coverage range;
step 4.2, drawing a first coverage area on a map according to the geographic coordinates of the first reference point, the optical cable length between the first reference point and the access end of the target optical cable and the optical cable length between the fault point and the access end of the target optical cable;
step 4.3, drawing a second coverage area on a map according to the geographic coordinate of the second reference point, the optical cable length between the second reference point and the access end of the target optical cable and the optical cable length between the fault point and the access end of the target optical cable;
and 4.4, selecting the superposition position of the track coverage range, the first coverage range and the second coverage range as a target geographic range.
Further, step 4.1 specifically includes:
and drawing an ellipse on the map according to the optical cable length between the first reference point and the access end of the target optical cable and the optical cable length between the second reference point and the access end of the target optical cable by taking the geographic coordinates of the first reference point and the geographic coordinates of the second reference point as focuses, wherein the range surrounded by the ellipse is a track coverage range.
Further, in step 4.1, the ellipse is drawn in the following way:
establishing an X0Y rectangular coordinate system on a map; the geographic coordinates of the first reference point and the geographic coordinates of the second reference point are both positioned on the X axis of the X0Y rectangular coordinate system and are symmetrical relative to the Y axis;
according to equation (X) 2 ÷A 2 )+(Y 2 ÷B 2 ) =1 drawing an ellipse;
wherein X represents the coordinate value of any point on the ellipse on the X axis in the X0Y rectangular coordinate system, Y represents the coordinate value of any point on the ellipse on the Y axis in the X0Y rectangular coordinate system, L 1 Representing the cable length, L, between the first reference point and the access tip of the target cable 2 Representing the cable length, L, between the second reference point and the access tip of the target cable 0 Indicating the linear distance between the first reference point and the second reference point.
Further, step 4.2 specifically includes:
using the geographic coordinate of the first reference point as the center of a circle and R as the center of a circle on the map 1 Drawing a circle for the radius, wherein the range enclosed by the circle is a first coverage range;
wherein R is 1 ＝|L 1 -L 3 |，L 1 Representing the cable length, L, between the first reference point and the access tip of the target cable 3 Indicating the cable length between the point of failure and the access tip of the target cable.
Further, step 4.3 specifically includes:
using the geographic coordinate of the second reference point as a circle center on the map, and using R as a circle center 2 Drawing a circle for the radius, wherein the range enclosed by the circle is a second coverage range;
wherein R is 2 ＝|L 2 -L 3 |，L 2 Representing the cable length, L, between the second reference point and the access tip of the target cable 3 Indicating the cable length between the point of failure and the access tip of the target cable.
Further, step 1 is performed when the optical cable is laid.
Further, in step 1, reference points are selected at equal intervals on the target cable according to the length of the cable.
Furthermore, the distance between the datum points is 300-600 meters.
The technical scheme of the invention at least has the following advantages and beneficial effects:
the optical cable fault point positioning method provided by the embodiment of the invention can reduce the searching range of the fault point to be within the target geographic range, thereby greatly reducing the difficulty of searching the fault point, reducing the time for searching the fault point and being beneficial to quickly repairing the optical cable.
Drawings
In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required to be used in the embodiment are briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. From these figures, other figures can be derived by those skilled in the art without inventive effort.
Fig. 1 is a schematic diagram of a fault point locating method for an optical cable according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of drawing an ellipse in the optical cable fault point positioning method provided in the embodiment of the present application.
In the figure: 011-first coverage; 012-second coverage; 013 — track coverage; 014-target geographic scope; 100-a target cable; 110-an access tip; 210-datum point; 220-datum point two; reference point number 230-three; 300-failure point; 400-optical time domain reflectometer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present invention, and not all of them.
Thus, the following detailed description of the embodiments of the invention is not intended to limit the scope of the invention as claimed, but is merely representative of some embodiments of the invention. 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 invention.
It should be noted that the embodiments of the present invention and the features and technical solutions thereof may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
The embodiment is as follows:
the present embodiment provides a method for positioning an optical cable fault point, and fig. 1 is a schematic diagram of the method for positioning an optical cable fault point provided in the present embodiment. Referring to fig. 1, the cable fault point locating method includes the following steps.
Step 1: a plurality of reference points are selected on target cable 100, the geographic coordinates of the reference points are recorded, and the cable length between the reference points and access tip 110 of target cable 100 is recorded.
To improve efficiency, this step is performed while laying the optical cable. It is understood that in other embodiments, step 1 may be performed after the cable is laid.
For convenience of illustration, in the present embodiment, three reference points, i.e., a first reference point 210, a second reference point 220, and a third reference point 230, are selected on the target cable 100. The geographical coordinates of each reference point are recorded. The cable length between adjacent reference points is 500 meters, and the cable length between reference point number one 210 and access tip 110 is also 500 meters. It will be appreciated that in other embodiments, the cable length between adjacent reference points may take on other values. The smaller the cable length between adjacent reference points, the more accurate the location of the fault point 300. The greater the cable length between adjacent reference points, the lower the cost of performing step 1. To balance the cost of performing step 1 with the accuracy of locating the failure point 300, the cable length between adjacent reference points may be set to 300-600 meters. In other embodiments, the cable length between adjacent reference points may also be different.
It is noted that, for ease of illustration, the trajectory of the target cable 100 is depicted in fig. 1. In practice, the method for locating a fault point in an optical cable provided in this embodiment does not know the specific extension track of the target optical cable 100, but only knows the geographic coordinates of the access tip 110 and the reference points.
And 2, step: the cable length between the fault point 300 of the target cable 100 and the access tip 110 of the target cable 100 is obtained by optical time domain reflectometry 400.
By connecting the optical time domain reflectometer 400 to the access tip 110, the cable length between the fault point 300 and the access tip 110 of the target cable 100 can be obtained by the optical time domain reflectometer 400. In this embodiment, the length of the optical cable between the fault point 300 and the access end 110 of the target optical cable 100 is 720 meters as detected by the optical time domain reflectometer 400.
It is noted that the specific location of the failure point 300 is labeled in fig. 1 for ease of illustration. In practical implementation, the cable fault point locating method provided in this embodiment does not know the specific location of the fault point 300, and only knows the cable length between the fault point 300 and the access terminal 110 of the target cable 100.
And 3, step 3: two reference points on either side of the failure point 300 are selected based on the cable length from the access tip 110 of the target cable 100, and are referred to as a first reference point and a second reference point, respectively, on either side of the failure point 300.
In this embodiment, the length of the cable between the first reference point 210 and the access tip 110 is 500 meters, and the length of the cable between the second reference point 220 and the access tip 110 is 1000 meters. Thus, datum 210 is referred to as a first datum and datum 220 is referred to as a second datum.
And 4, step 4: a target geographic range 014 containing the fault point 300 is drawn on the map based on the geographic coordinates of the first reference point (reference point one 210), the geographic coordinates of the second reference point (reference point two 220), the cable length between the first reference point (reference point one 210) and the access tip 110 of the target cable 100, the cable length between the second reference point (reference point two 220) and the access tip 110 of the target cable 100, and the cable length between the fault point 300 and the access tip 110 of the target cable 100.
Specifically, step 4 further includes the following steps.
Step 4.1, drawing a range covered by all possible extending tracks of the optical cable between the first reference point (the first reference point 210) and the second reference point (the second reference point 220) on the map according to the geographic coordinates of the first reference point (the first reference point 210), the geographic coordinates of the second reference point (the second reference point 220), the optical cable length between the first reference point (the first reference point 210) and the access tip 110 of the target optical cable 100 and the optical cable length between the second reference point (the second reference point 220) and the access tip 110 of the target optical cable 100, wherein the range is a track coverage range 013.
Specifically, with the geographic coordinates of the first reference point (the first reference point 210) and the geographic coordinates of the second reference point (the second reference point 220) as the focal points, an ellipse is drawn on the map according to the cable length between the first reference point (the first reference point 210) and the access tip 110 of the target cable 100 and the cable length between the second reference point (the second reference point 220) and the access tip 110 of the target cable 100, and the range enclosed by the ellipse is the track coverage range 013.
Fig. 2 is a schematic diagram of drawing an ellipse in the method for positioning a fault point of an optical cable provided in this embodiment. Referring to fig. 2, an ellipse is drawn in the following manner:
establishing an X0Y rectangular coordinate system on a map; the geographic coordinates of the first reference point (the first reference point 210) and the geographic coordinates of the second reference point (the second reference point 220) are both positioned on the X axis of the X0Y rectangular coordinate system and are symmetrical relative to the Y axis;
according to equation (X) 2 ÷A 2 )+(Y 2 ÷B 2 ) =1 drawing an ellipse;
wherein X represents the coordinate value of any point on the ellipse on the X axis in the X0Y rectangular coordinate system, Y represents the coordinate value of any point on the ellipse on the Y axis in the X0Y rectangular coordinate system, L 1 Represents the cable length, L, between the first reference point (reference point number 210) and the access tip 110 of the target cable 100 2 Represents the cable length, L, between the second reference point (reference point two 220) and the access tip 110 of the target cable 100 0 Indicating a linear distance between the first reference point (the first reference point 210) and the second reference point (the second reference point 220). In the present embodiment, the straight distance between the first reference point (the first reference point 210) and the second reference point (the second reference point 220) is 400 meters.
In this embodiment, L 1 ＝500，L 2 ＝1000，L 0 =400. The following are obtained through calculation:
i.e. according to equation (X) 2 ÷250 2 )+(Y 2 ÷150 2 ) =1 ellipse drawing.
And 4.2: the first coverage area 011 is mapped based on the geographic coordinates of the first reference point (reference point number 210), the cable length between the first reference point (reference point number 210) and the access tip 110 of the target cable 100, and the cable length between the fault point 300 and the access tip 110 of the target cable 100.
Specifically, the geographic coordinates of the first reference point (the first reference point 210) are taken as the center of a circle, and R is taken as the center of a circle on the map 1 Drawing a circle for the radius, wherein the range enclosed by the circle is 011;
wherein R is 1 ＝|L 1 -L 3 |，L 1 Represents the cable length, L, between the first reference point (reference point number 210) and the access tip 110 of the target cable 100 3 Indicating the cable length between the fault point 300 and the access tip 110 of the target cable 100.
In this embodiment, L 1 ＝500，L 3 =720. Calculating to obtain R 1 ＝220。
Step 4.3, drawing a second coverage area 012 on the map according to the geographic coordinates of the second reference point (reference point two 220), the cable length between the second reference point (reference point two 220) and the access end 110 of the target cable 100, and the cable length between the fault point 300 and the access end 110 of the target cable 100.
Specifically, the geographic coordinate of the second reference point (the second reference point 220) is used as the center of a circle on the map, and R is used as the center of the circle 2 A circle is drawn for the radius, and the range enclosed by the circle is the second coverage range 012;
wherein R is 2 ＝|L 2 -L 3 |，L 2 Represents the cable length, L, between the second reference point (reference point two 220) and the access tip 110 of the target cable 100 3 Indicating the cable length between the fault point 300 and the access tip 110 of the target cable 100.
In this embodiment, L 2 ＝1000，L 3 =720. Calculating to obtain R 2 ＝280。
And 4.4, selecting a superposed part of the track coverage area 013, the first coverage area 011 and the second coverage area 012 as a target geographical area 014.
And 5: the failure point 300 is found according to the target geographical range 014.
By the optical cable fault point positioning method provided by the embodiment, the searching range of the fault point 300 can be reduced to the target geographical range 014, so that the difficulty of searching the fault point 300 is greatly reduced, the time for searching the fault point 300 is reduced, and the optical cable can be rapidly repaired.
The above description is only a few examples of the present invention, and is not intended to limit the present invention, so that those skilled in the art may make various modifications and changes to the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The method for positioning the fault point of the optical cable is characterized by comprising the following steps:
step 1, selecting a plurality of reference points on a target optical cable, recording geographic coordinates of the reference points, and recording the length of the optical cable between the reference points and an access end of the target optical cable;
step 2, obtaining the optical cable length between the fault point of the target optical cable and the access end of the target optical cable through an optical time domain reflectometer;
step 3, selecting two reference points positioned at two sides of the fault point according to the length of the optical cable between the optical cable and the access end of the target optical cable, and respectively calling the two reference points positioned at two sides of the fault point as a first reference point and a second reference point;
step 4, drawing a target geographical range containing the fault point on a map according to the geographical coordinates of the first reference point, the geographical coordinates of the second reference point, the optical cable length between the first reference point and the access end of the target optical cable, the optical cable length between the second reference point and the access end of the target optical cable and the optical cable length between the fault point and the access end of the target optical cable;
step 5, searching the fault point according to the target geographic range;
the step 4 specifically includes:
step 4.1, drawing a range covered by all possible extending tracks of the optical cable between the first reference point and the second reference point on a map according to the geographic coordinate of the first reference point, the geographic coordinate of the second reference point, the optical cable length between the first reference point and the access end of the target optical cable and the optical cable length between the second reference point and the access end of the target optical cable, wherein the range is a track coverage range;
step 4.2, drawing a first coverage range on a map according to the geographic coordinate of the first reference point, the optical cable length between the first reference point and the access end of the target optical cable and the optical cable length between the fault point and the access end of the target optical cable;
step 4.3, drawing a second coverage area on a map according to the geographic coordinates of the second reference point, the optical cable length between the second reference point and the access end of the target optical cable and the optical cable length between the fault point and the access end of the target optical cable;
step 4.4, selecting the coincidence position of the track coverage range, the first coverage range and the second coverage range as the target geographic range;
the step 4.1 specifically comprises:
and drawing an ellipse on a map according to the optical cable length between the first datum point and the access end of the target optical cable and the optical cable length between the second datum point and the access end of the target optical cable by taking the geographic coordinate of the first datum point and the geographic coordinate of the second datum point as focuses, wherein the range surrounded by the ellipse is the track coverage range.
2. The method for locating a fault point of an optical cable according to claim 1, wherein in the step 4.1, an ellipse is drawn by:
establishing an X0Y rectangular coordinate system on a map; the geographic coordinates of the first reference point and the geographic coordinates of the second reference point are both positioned on the X axis of the X0Y rectangular coordinate system and are symmetrical relative to the Y axis;
according to equation (X) 2 ÷A 2 )+(Y 2 ÷B 2 ) =1 drawing an ellipse;
wherein X represents the coordinate value of any point on the ellipse on the X axis in the X0Y rectangular coordinate system, Y represents the coordinate value of any point on the ellipse on the Y axis in the X0Y rectangular coordinate system, L 1 Representing a cable length, L, between the first reference point and the access tip of the target cable 2 Representing a cable length, L, between the second reference point and the access tip of the target cable 0 Represents a straight-line distance between the first reference point and the second reference point.
3. The optical cable fault point positioning method according to claim 1, wherein the step 4.2 specifically includes:
taking the geographic coordinates of the first reference point as the center of a circle and taking R as the center of a circle on a map 1 Drawing a circle for the radius, wherein the range enclosed by the circle is the first coverage range;
wherein R is 1 ＝|L 1 -L 3 |，L 1 Representing a cable length, L, between the first reference point and the access tip of the target cable 3 Representing a cable length between the fault point and the access tip of the target cable.
4. The optical cable fault point positioning method according to claim 1, wherein the step 4.3 specifically includes:
taking the geographic coordinate of the second reference point as the center of a circle and taking R as the center of a circle on the map 2 Draw a circle for the radius of theThe range surrounded by the circles is the second coverage range;
wherein R is 2 ＝|L 2 -L 3 |，L 2 Representing a cable length, L, between the second reference point and the access tip of the target cable 3 Representing a cable length between the fault point and the access tip of the target cable.
5. The optical cable fault point positioning method as claimed in claim 1, wherein:
the step 1 is performed when the optical cable is laid.
6. The optical cable fault point positioning method as claimed in claim 1, wherein:
in the step 1, the reference points are selected at equal intervals on the target optical cable according to the length of the optical cable.
7. The optical cable fault point positioning method as claimed in claim 6, wherein: the distance between the reference points is 300-600 meters.
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| CN105187121A (en) * | 2015-06-18 | 2015-12-23 | 天津纤测道客科技发展有限公司 | Communication optical cable fault point surface position location method and system |
| JP2017101931A (en) * | 2015-11-30 | 2017-06-08 | 株式会社東芝 | Fault point location device, method, and program thereof |
| CN108923847A (en) * | 2018-08-09 | 2018-11-30 | 平湖波汇通信科技有限公司 | A kind of Cable's Fault monitoring and accurate positioning method based on GIS |
| CN111049574A (en) * | 2019-12-03 | 2020-04-21 | 广东电网有限责任公司 | Method and system for quickly positioning optical cable interruption position |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105187121A (en) * | 2015-06-18 | 2015-12-23 | 天津纤测道客科技发展有限公司 | Communication optical cable fault point surface position location method and system |
| JP2017101931A (en) * | 2015-11-30 | 2017-06-08 | 株式会社東芝 | Fault point location device, method, and program thereof |
| CN108923847A (en) * | 2018-08-09 | 2018-11-30 | 平湖波汇通信科技有限公司 | A kind of Cable's Fault monitoring and accurate positioning method based on GIS |
| CN111049574A (en) * | 2019-12-03 | 2020-04-21 | 广东电网有限责任公司 | Method and system for quickly positioning optical cable interruption position |
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