CN111082862B - Method for accurately positioning fault of trunk line of long-distance transmission optical cable - Google Patents
Method for accurately positioning fault of trunk line of long-distance transmission optical cable Download PDFInfo
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- CN111082862B CN111082862B CN201911227098.3A CN201911227098A CN111082862B CN 111082862 B CN111082862 B CN 111082862B CN 201911227098 A CN201911227098 A CN 201911227098A CN 111082862 B CN111082862 B CN 111082862B
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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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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The invention discloses a method for accurately positioning a fault of a trunk line of an optical cable for long-distance transmission, belongs to the field of communication, and particularly relates to a method for positioning a fault of an optical cable. The method of the invention collects the pole and line information of the long-distance optical cable main line through the GPS positioning function, and the system records, automatically correlates and calculates the pole and line length. When fault information of user complaints or network management alarms exists, the fault section can be calculated and positioned by selecting the starting point and the fault distance of the corresponding rod and the fault handling personnel can arrive at the site in time for handling according to the prompt, and the high-efficiency handling of the transmission trunk fault is realized.
Description
Technical Field
The invention belongs to the field of communication, and particularly relates to a method for positioning an optical cable fault.
Background
The trunk line of the long-distance transmission optical cable is used as an important line support of a long-distance communication network, and the smooth of the long-distance communication network in province, province and international is concerned. However, since Yunnan province is located in plateau, the geographic environment is complex, and the difficulty of planning and wiring, and checking and troubleshooting of the optical cable line is high.
The current processing means adopted for the transmission optical cable trunk line fault is as follows: and fault processing personnel carry a large number of professional instruments to find fault points on site and process faults according to the information of the user complaints or the network management alarms, and then communication is recovered. However, since the device finds only the fault distance and cannot accurately determine the specific fault point, that is, which one or which section of pole line is found, it only takes a long time to find the fault point section by manpower. If the cable is in an urban area or an open area, the searching difficulty is relatively low, but when the cable runs in an optical cable line with a bad geographical position, a fault processing worker needs to carry a large amount of equipment to move on foot and also needs to continuously search fault points, the searching difficulty, the consumed time and the energy are very large, the efficiency is very low, and the low fault processing efficiency seriously influences the network use perception of a user.
Disclosure of Invention
The invention aims to collect the pole and line information of the trunk line of the long-distance optical cable by the GPS positioning function, and the system records, automatically associates and calculates the pole and line length. When fault information of user complaints or network management alarms exists, the fault section can be calculated and positioned by selecting the starting point and the fault distance of the corresponding rod and the fault handling personnel can arrive at the site in time for handling according to the prompt, and the high-efficiency handling of the transmission trunk fault is realized.
The invention discloses a method for accurately positioning the fault of a trunk line of a long-distance transmission optical cable, which is characterized by comprising the steps of trunk line information acquisition, data verification and fault positioning, and specifically comprises the following steps:
the trunk line information acquisition comprises manual acquisition and automatic acquisition;
the manual collection is manually collected from the first rod to the last rod along the optical cable trunk line, and the collected specific information comprises the following contents:
1. trunk line information, namely an optical cable line to be calibrated;
2. relay segment information;
3. an object type; the object types are generally aerial, pipeline and direct-buried, wherein the type corresponding to the electric pole is aerial, the type corresponding to the manhole is pipeline, and the type corresponding to the monument is direct-buried;
4. the number of the current pole;
5. the longitude and latitude of the current pole are automatically acquired by positioning the current pole through a GPS;
6. the number of the previous rod is the number of the current rod if the current rod is the initial rod;
7. calculating the distance between the current pole and the previous pole according to the longitude and latitude data of the current pole and the previous pole through a triangle derivation formula;
8. whether a joint exists;
9. reserving the number of meters;
the automatic acquisition starts when manual acquisition is started, and simultaneously starts a GPS automatic acquisition function, and acquires coordinate data of a GPS at intervals of set seconds or distance along a route actually laid by an optical cable trunk line;
the data verification comprises the following contents:
1. discarding data with larger deviation or associated error;
2. comparing, screening, correcting manual collection and automatic collection data, the coordinate data of manual collection and automatic collection record is the same and is directly selected for use, other data need select for use after correcting, specifically be:
correcting data with coincident longitudes or latitudes in manually acquired coordinate data, wherein the correction is that in the data automatically acquired at corresponding positions, after the hypotenuses of two adjacent data trigonometric functions are calculated, the distances between the acquired data points are accumulated and selected;
the manual acquisition rod is a straight line distance, but is actually a line laid by a curve, and the least square algorithm is adopted to carry out multiple fitting, superposition correction and selection on the data automatically acquired by the corresponding point positions;
and after the fault occurs, measuring the distance between the breakpoint and the monitoring point, and positioning the corresponding distance from the monitoring point in the forward direction or the reverse direction, wherein the point positioned by the distance is the fault point position.
The GPS positioning can adopt the GPS function positioning of a mobile phone or other equipment with the GPS positioning function.
The triangle derivation formula is a formula for calculating the distance between each node according to the longitude and latitude, and the formula is as follows:
assuming that the Longitude and Latitude of the node A are (lonA, latA), the Longitude and Latitude of the node B are (LonB, latB), according to the reference of 0-degree Longitude, the east Longitude takes a positive value (Longitude), the west Longitude takes a negative value (Longitude), the north Latitude takes a 90-Latitude value (90-Latitude), and the south Latitude takes a 90+ Latitude value (90 + Latitude), the two processed points are counted as (MLonA, MLatA) and (MLonB, MLatMLatB). According to the formula derived by the triangle, the following results are obtained:
C＝sin(MLatA)*sin(MLatB)*cos(MLonA-MLonB)+cos(MLatA)*cos(MLatB)
A. the distance between B is:
D i ＝R*Arccos(C)*Pi/180
the earth is a nearly standard ellipsoid with an equatorial radius of 6378.140 km, a polar radius of 6356.755 km, and an average radius of 6371.004 km. We assume that the earth is a perfect sphere, and its radius is the average radius, i.e. R =6371.004 km.
The distance formula of the whole trunk line is as follows:
the trigonometric function hypotenuse calculation method specifically comprises the following steps:
and if the altitude of the acquisition point to be selected is increased or decreased by analyzing, and the section of the route is concluded to have gradient change, selecting a trigonometric function algorithm.
According to the formula a 2 +b 2 ＝c 2 ；
And respectively calculating the inclined edge of each section and then performing accumulation calculation.
I.e. the distance L = L 0-1 +l 1-2 +l 2-3 +……+l 22-23 +l 23-24 +l 24-25 。
The two-multiplication algorithm is a straight line fitting algorithm for fitting and superposing data for multiple times, and specifically comprises the following steps of:
if the radian of the acquisition point to be selected is analyzed, the line passing through a river channel, a reservoir and other complex conditions is seen on the map, a straight line fitting algorithm is selected, a least square method is adopted to automatically fit a straight line, and points with large deviation are filtered.
From the collected points, its function y = f (x) is found. Although it is unlikely that an accurate function can be found, we can find its approximate curve
It is assumed that there are points, P =1,2,3, \8230; \8230n, an approximate curve is obtained
And make it possible to
Least sum of squared deviations from y = f (x), deviation
The coordinate point collected is (x) 1 ,y 1 ),(x 2 ,y 2 )…(x n ,y n )
According to the set fitting polynomial: y = ax + b
The sum of the squared deviations is as follows:
it is necessary to find the best set of a, b, which is to minimize all errors of the selected a, b, i.e. to try to find the a and b corresponding to the most suitable straight line.
The line thus fitted intersects the line previously fitted to produce an intersection point l 1 Using the current point of intersection and the previously determined point of intersection l 0 Find l 0-1 The distance reduces large errors caused by positioning deviation. And after the straight line intersection point connecting line is fitted for many times, performing accumulation calculation according to the principle that the lengths of the small sections of equal tangent lines are added to the length close to the arc.
I.e. the distance:
L＝l 0-1 +l 1-2 +l 2-3 +……+l 22-23 +l 23-24 +l 24-25 。
and fault positioning, namely measuring the outgoing fault distance of the relay room through an OTDR (optical time domain reflectometer) professional instrument in a specific trunk section of the long-distance transmission optical cable, wherein forward positioning is to calculate and position from the relay room at the starting point, and reverse positioning is to calculate and position from the relay room at the end point. According to the distance calculation formula:
L′＝L-L distance to failure 。
And the fault section is calculated and positioned at the rod point No. 7, so that the operation is simple and the identification is easy.
In addition, through setting up, corresponding information can show on hundred degrees maps, can direct navigation arrive the fault point, makes the first-line personnel of fault handling, especially can make things convenient for, the quick trouble section of arriving of the personnel of not having a good idea of line, carries out the troubleshooting work.
The method of the invention realizes the positioning of the faults of the main pipeline, the direct burial and the electric pole, greatly reduces the time consumed by manual fault detection technically, has the fault positioning success rate of more than 95 percent, and has the compression rate of more than 84 percent of the average processing time of the optical cable type fault work order. The method effectively improves the fault processing efficiency of a maintenance line, and ensures the improvement of network quality and user use perception.
Drawings
Fig. 1 is a screenshot of part of the markstone information collected in embodiment 1.
FIG. 2 is a length screenshot of the whole trunk calculated according to the coordinates in example 1.
Fig. 3 is a screenshot of a part of the pole information collected in embodiment 2.
FIG. 4 is a length screenshot of the whole trunk calculated according to the coordinates in example 2.
Detailed Description
Example 1: and (3) selecting a trunk information acquisition and fault location of a Qujing-Kunming trunk section for a trunk-Nangui-Kunming optical cable. Firstly, the trunk information is collected, then the collected data is verified, and then the fault is positioned.
The information acquisition comprises manual acquisition and automatic acquisition.
The manual collection is that a maintainer collects data from a first rod to a last rod along a transmission optical cable line, and starts to collect data from a 535 th markstone after the 535 th markstone is started, wherein the collected specific information comprises the following contents:
1. selecting 'one trunk-Nangui Kun-trunk optical cable' for trunk information, namely optical cable lines to be calibrated;
2. selecting 'Qujing-Kunming section' as trunk section information;
3. selecting 'direct burial' as the object type; the object types generally comprise overhead, pipeline and direct-buried (the type corresponding to an electric pole is overhead, the type corresponding to a manhole is pipeline, and the type corresponding to a monument is direct-buried);
4. number "535" of the current stick;
5. the longitude and latitude of the current pole are automatically acquired by positioning the current pole through a mobile phone GPS;
6. the number of the previous pole is filled 535 because the current pole is the initial pole, that is, if the current pole is the initial pole, the number of the previous pole is filled 535;
7. measuring the distance between the current rod and the previous rod, and displaying the distance between the current rod and the previous rod to be 0; the distance is calculated by the longitude and latitude data of the current pole and the previous pole through a triangular derivation formula;
8. whether joints exist or not, and selecting 'no joints';
9. reserving the number of meters, and selecting 3 meters.
And after the information is acquired, the information acquisition of the current rod is completed, and by parity of reasoning, the information acquisition of the next rod is continued until the information acquisition of 121 rods is completed.
The automatic acquisition is that when manual acquisition is started, the GPS automatic acquisition function of the mobile phone is started at the same time, and the coordinate data of the GPS, namely longitude and latitude information, is acquired every 5 seconds along the actual laid route of the optical cable trunk line.
The data verification comprises the following contents:
1. data with larger deviations or associated errors are discarded. Comparing the collected 121 data, and clearing the object ID which is not in the correct sequence, such as the data No. 8759 in the figure 1, and leaving 99 data;
2. comparing, screening and correcting manually acquired and automatically acquired data, directly selecting the manually acquired and automatically acquired recorded coordinates, selecting automatically acquired data if the longitude or latitude in the coordinate data is coincident, calculating the inclined sides of two adjacent data trigonometric functions, and accumulating the distances between all points for selection;
the geographic coordinate information of the mark post No. 535-568 is almost the same as the coordinates of manual acquisition and automatic acquisition records, which shows that the geographic environment of the section of line is better, has no steep slope or camber and can be directly selected;
and if the manually collected coordinates of the No. 569-578 marker posts coincide, analyzing the altitude of each point to obtain that the line is an ascending slope, and performing hypotenuse calculation on the coordinate data obtained by automatically collecting every 5 seconds between the No. 569-578 marker posts by adopting a trigonometric function algorithm and then performing distance accumulation on the two adjacent data to form the actual distance between the No. 569-578 marker posts. And by parity of reasoning, finishing the sorting and checking of all the data continuously.
After the verification is completed, the Baidu map SDK can be used for displaying after configuring relevant parameters, and the length of the whole trunk line segment is calculated according to the coordinates, as shown in figure 2.
After the fault occurs, according to the alarm information monitored by the transmission comprehensive network management system, the fault location detects that the breakpoint is 25km away from the machine room through an optical time domain reflectometer (ODTR) when a person arrives at an optical fiber distribution frame (ODF) of a curved and pure damby machine room at the starting point of the section of the optical cable. And then forward positioning is selected according to the fault distance of 25KM, and the position of a fault point which is 25KM away is 552 markstones, so that the fault point position can be quickly found.
In the past, people are required to detect and search the front and rear rods with special equipment in the vicinity of 25km according to experience, and much time and energy are consumed.
Example 2: and selecting trunk line information acquisition and fault location of the trunk-NanKunming optical cable in the relay section of the Yiliang-Kunming section. Firstly, the trunk information is collected, then the collected information is verified, and then the fault is positioned.
Maintainer follows transmission optical cable line and gathers from first pole to last pole, and the collection of data is then begun from No. 1 pole to the 1 st pole of originated pole, and the concrete information of gathering includes following content:
1. selecting 'one trunk-NanKun-trunk optical cable' for trunk information, namely optical cable lines to be calibrated;
2. the relay section information selects 'good-Kunming section';
3. selecting 'overhead' as an object type;
4. number "1" of the current bar;
5. the longitude and latitude of the current pole are automatically acquired by positioning the current pole through a mobile phone GPS;
6. the number of the previous rod is also filled with 1 because the current rod is the initial rod;
7. measuring the distance between the current rod and the previous rod, and displaying the distance between the current rod and the previous rod to be 0;
8. whether a joint exists or not, selecting 'the joint exists';
9. reserving the number of meters, and selecting 5 meters.
After the information is acquired, the information acquisition on the current pole is completed, and by parity of reasoning, the information acquisition on the next pole is continued until the information acquisition on 100 poles is completed, as shown in fig. 3.
The automatic acquisition is that when manual acquisition is started, the GPS automatic acquisition function of the mobile phone is started at the same time, and the coordinate data of the GPS, namely longitude and latitude information, is acquired every 2m along the actual laying route of the optical cable.
The data verification comprises the following contents:
1. data with larger deviations or associated errors are discarded. Comparing the collected 100 data, and clearing the object ID which is not in the correct sequence, wherein 95 data are left;
2. comparing, screening and correcting manually acquired and automatically acquired data, directly selecting the coordinates which are recorded by manual acquisition and automatic acquisition and are the same, and selecting the coordinates which are laid under a reservoir or a civil building and cannot be acquired manually after correcting the coordinates by using a straight line fitting algorithm;
the geographic coordinate information of the No. 1-56 rods is almost the same as the coordinates acquired and recorded by a manual acquisition system and an automatic acquisition system, which indicates that the geographic environment of the section of line is better, has no steep slope or camber and can be directly selected;
the straight line distance between the No. 57 and the No. 58 points reaches 10KM, the collection personnel feeds back that the reservoir is used, the optical cable line is buried below the reservoir through a pipeline, and people cannot stand at the actual buried point of the reservoir to collect data. Therefore, the coordinate data acquired automatically needs to be selected after correction. The automatic acquisition is to acquire 58 data according to the advancing route of people along the actual laying line of the optical cable at the bank of the reservoir, and the data are subjected to multiple fitting and superposition correction by adopting a least square algorithm to obtain a connecting line which tends to be in a circular arc shape and is a curve close to the actual water bottom condition of the reservoir. And by parity of reasoning, finishing the sorting and checking of all the data continuously.
After the verification is completed, the hundredth map SDK can be used for displaying after configuring related parameters, and the length of the whole segment of the trunk line segment is calculated according to the coordinates, as shown in FIG. 4.
After the fault occurs, according to the alarm information monitored by the transmission comprehensive network management system, the fault location detects that the breakpoint is 50km away from the machine room through an optical time domain reflectometer (ODTR) when a person reaches an Optical Distribution Frame (ODF) of the Kunming west aster machine room at the starting point of the section of the optical cable. And then reverse positioning is selected according to the fault distance of 50KM, and the position of a fault point away from 50KM is a No. 73 electric pole, so that the fault point position can be quickly found.
Claims (2)
1. The method for accurately positioning the fault of the trunk line of the long-distance transmission optical cable is characterized by comprising trunk line information acquisition, data verification and fault positioning, and specifically comprises the following steps:
the trunk line information acquisition comprises manual acquisition and automatic acquisition;
the manual collection is manually collected from the first rod to the last rod along the optical cable trunk line, and the collected specific information comprises the following contents:
1. trunk line information, namely an optical cable line to be calibrated;
2. relay segment information;
3. object types including electric poles, pipelines and direct burial;
4. the number of the current pole;
5. the longitude and latitude of the current pole are automatically acquired by positioning the current pole through a GPS;
6. the number of the previous rod is the number of the current rod if the current rod is the initial rod;
7. calculating the distance between the current pole and the previous pole according to the longitude and latitude data of the current pole and the previous pole through a triangular derivation formula;
8. whether a joint exists;
9. reserving the number of meters;
the automatic acquisition is that when manual acquisition is carried out, a GPS automatic acquisition function is started, and the coordinate data of a GPS is acquired every set seconds or distance along a route actually laid by an optical cable trunk line;
the data verification comprises the following contents:
1. discarding data with larger deviation or associated error;
2. comparing, screening, correcting manual collection and automatic collection data, the coordinate data of manual collection and automatic collection record is the same and is directly selected for use, other data need select for use after correcting, specifically be:
correcting data with coincident longitudes or latitudes in manually collected coordinate data, wherein the correction is performed on the data automatically collected at corresponding positions, and after calculating the hypotenuses of two adjacent data trigonometric functions, the distances between the obtained data points are accumulated and selected;
the manual acquisition rod is a straight line distance, but is actually a line laid by a curve, and the least square algorithm is adopted to carry out multiple fitting, superposition correction and selection on the data automatically acquired by the corresponding point positions;
and after the fault occurs, the distance between the breakpoint and the monitoring point is measured, the corresponding distance is positioned from the monitoring point in the forward direction or the reverse direction, and the point positioned by the distance is the fault point position.
2. A method for accurately locating a fault in a trunk line of a long distance transmission optical cable according to claim 1, wherein the GPS location is performed by using a GPS function of a cellular phone or by using other equipment having a GPS location function.
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| CN111884713A (en) * | 2020-07-23 | 2020-11-03 | 天津德力仪器设备有限公司 | Geographical position fault positioning method for optical network operation and maintenance |
| CN112019265A (en) * | 2020-09-21 | 2020-12-01 | 国网安徽省电力有限公司池州供电公司 | Optical cable fault monitoring method based on OTDR and GIS |
| CN113810232B (en) * | 2021-09-16 | 2024-02-23 | 北京百度网讯科技有限公司 | Fault area determination method, device, electronic equipment and storage medium |
| CN116545529B (en) * | 2023-07-06 | 2023-09-12 | 国网浙江省电力有限公司湖州供电公司 | Fault data processing method based on optical cable operation and maintenance path |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546877A (en) * | 2016-11-08 | 2017-03-29 | 国网上海市电力公司 | A kind of Method of Cable Trouble Point accurate positioning method based on curve matching |
| CN108306674A (en) * | 2018-01-12 | 2018-07-20 | 北京天元创新科技有限公司 | A kind of localization method and positioning device of fault points of optical cables |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101334288B (en) * | 2008-08-07 | 2010-08-25 | 北京工业大学 | Public transport bus exact stop method based on standard line matching |
| JP7013802B2 (en) * | 2017-11-09 | 2022-02-15 | 日立金属株式会社 | Optical cable monitoring system |
-
2019
- 2019-12-05 CN CN201911227098.3A patent/CN111082862B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546877A (en) * | 2016-11-08 | 2017-03-29 | 国网上海市电力公司 | A kind of Method of Cable Trouble Point accurate positioning method based on curve matching |
| CN108306674A (en) * | 2018-01-12 | 2018-07-20 | 北京天元创新科技有限公司 | A kind of localization method and positioning device of fault points of optical cables |
Non-Patent Citations (2)
| Title |
|---|
| 光纤传输网实时监测及故障自动定位系统的设计;黄建文;《电信科学》;20020615(第06期);第60-63页 * |
| 基于GIS和OTDR的光纤智能监控系统研究;张娜;《计算机测量与控制》;20160225(第02期);第99-102页 * |
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