CN114157348B - Optical cable fault point positioning method - Google Patents

Optical cable fault point positioning method Download PDF

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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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optical cable
reference point
point
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length
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CN114157348A (en
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赵敏
杜书
赵波
陈少磊
陈昶
廖彬宇
黄思婕
贺佳玮
李欣然
范红梅
吴雅玥
张鹤鹏
王海霖
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State Grid Sichuan Electric Power Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/071Arrangements 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]
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/31Testing 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
    • G01M11/3109Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0791Fault location on the transmission path

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Abstract

本发明涉及电力通讯技术领域,公开了一种光缆故障点定位方法,该方法根据第一基准点的地理坐标、第二基准点的地理坐标、第一基准点与目标光缆的接入端头之间的光缆长度、第二基准点与目标光缆的接入端头之间的光缆长度以及故障点与目标光缆的接入端头之间的光缆长度在地图上绘制包含故障点的目标地理范围。通过将故障点的搜寻范围缩小至目标地理范围,大大降低了搜寻故障点的难度,降低了搜寻故障点的时间,有利于快速抢修光缆。

Figure 202111401127

The invention relates to the technical field of electric power communication, and discloses a method for locating a fault point of an optical cable. The length of the optical cable between the second reference point and the access end of the target optical cable, and the length of the optical cable between the fault point and the access end of the target optical cable are drawn on the map to include the target geographical range of the fault point. By narrowing the search range of the fault point to the target geographical range, the difficulty of searching for the fault point is greatly reduced, the time for searching for the fault point is reduced, and it is beneficial to quickly repair the optical cable.

Figure 202111401127

Description

光缆故障点定位方法Optical cable fault location method

技术领域technical field

本发明涉及电力通讯技术领域,尤其涉及一种光缆故障点定位方法。The invention relates to the technical field of electric power communication, in particular to a method for locating an optical cable fault point.

背景技术Background technique

光缆广泛运用于电力通讯系统中,维护通讯光缆是电力系统维护中重要工作。通讯光缆往往因为施工、自然灾害等原因被破坏。通讯光缆被破坏后,需要尽快抢修,否则有可能影响电力系统的运行。Optical cables are widely used in power communication systems, and maintenance of communication optical cables is an important task in power system maintenance. Communication optical cables are often damaged due to construction, natural disasters and other reasons. After the communication optical cable is damaged, it needs to be repaired as soon as possible, otherwise it may affect the operation of the power system.

在通讯光缆损坏后,可以在光缆的接入端头连接光时域反射仪,通过光时域反射仪可以检测得到故障点与光缆的接入端头之间的光缆长度。但是,由于光缆存在弯曲、转向等情况,使得光缆各处的具体地理位置难以明确。也即是说,仅仅根据故障点与光缆的接入端头之间的光缆长度难以准确获得故障点的具体地理位置,有的情况下定位的故障点的位置与故障点的实际位置的直线误差甚至能够达到2公里。这大大降低了抢修光缆的速度。After the communication optical cable is damaged, an optical time domain reflectometer can be connected to the access end of the optical cable, and the length of the optical cable between the fault point and the access end of the optical cable can be detected by the optical time domain reflectometer. However, due to the bending and turning of the optical cable, it is difficult to determine the specific geographical location of each location of the optical cable. That is to say, it is difficult to accurately obtain the specific geographical location of the fault point only based on the length of the optical cable between the fault point and the access end of the optical cable. In some cases, the linear error between the location of the fault point and the actual position of the fault point It can even reach 2 kilometers. This greatly reduces the speed of repairing optical cables.

发明内容Contents of the invention

本发明的目的在于克服现有技术的不足,提供一种光缆故障点定位方法。The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for locating fault points of optical cables.

本发明的另一个目的在于提供一种。Another object of the present invention is to provide one.

本发明的实施例通过以下技术方案实现:Embodiments of the invention are achieved through the following technical solutions:

光缆故障点定位方法,包括:Optical cable fault location method, including:

步骤1,在目标光缆上选取多个基准点,记录基准点的地理坐标,记录基准点与目标光缆的接入端头之间的光缆长度;Step 1, select a plurality of reference points on the target optical cable, record the geographic coordinates of the reference points, and record the length of the optical cable between the reference point and the access end of the target optical cable;

步骤2,通过光时域反射仪获得目标光缆的故障点与目标光缆的接入端头之间的光缆长度;Step 2, obtaining the length of the optical cable between the fault point of the target optical cable and the access end of the target optical cable through an optical time domain reflectometer;

步骤3,根据与目标光缆的接入端头之间的光缆长度选择位于故障点两侧的两个基准点,将位于故障点两侧的两个基准点分别称为第一基准点和第二基准点;Step 3: Select two reference points located on both sides of the fault point according to the length of the optical cable between the access end of the target optical cable, and call the two reference points located on both sides of the fault point the first reference point and the second reference point respectively. datum point;

步骤4,根据第一基准点的地理坐标、第二基准点的地理坐标、第一基准点与目标光缆的接入端头之间的光缆长度、第二基准点与目标光缆的接入端头之间的光缆长度以及故障点与目标光缆的接入端头之间的光缆长度在地图上绘制包含故障点的目标地理范围;Step 4, according to the geographic coordinates of the first reference point, the geographic coordinates of the second reference point, the length of the optical cable between the first reference point and the access end of the target optical cable, the second reference point and the access end of the target optical cable Draw the target geographical range including the fault point on the map;

步骤5,根据目标地理范围寻找故障点。Step 5, find fault points according to the target geographical range.

进一步的,步骤4具体包括:Further, step 4 specifically includes:

步骤4.1,根据第一基准点的地理坐标、第二基准点的地理坐标、第一基准点与目标光缆的接入端头之间的光缆长度以及第二基准点与目标光缆的接入端头之间的光缆长度在地图上绘制第一基准点和第二基准点之间光缆所有可能的延伸轨迹所覆盖的范围,该范围为轨迹覆盖范围;Step 4.1, according to the geographic coordinates of the first reference point, the geographic coordinates of the second reference point, the length of the optical cable between the first reference point and the access end of the target optical cable, and the second reference point and the access end of the target optical cable Draw the range covered by all possible extension trajectories of the optical cable between the first reference point and the second reference point on the map, and this range is the trajectory coverage;

步骤4.2,根据第一基准点的地理坐标、第一基准点与目标光缆的接入端头之间的光缆长度以及故障点与目标光缆的接入端头之间的光缆长度在地图上绘制第一覆盖范围;Step 4.2, according to the geographical coordinates of the first reference point, the length of the optical cable between the first reference point and the access end of the target optical cable, and the length of the optical cable between the fault point and the access end of the target optical cable, draw the first point on the map - Coverage;

步骤4.3,根据第二基准点的地理坐标、第二基准点与目标光缆的接入端头之间的光缆长度以及故障点与目标光缆的接入端头之间的光缆长度在地图上绘制第二覆盖范围;Step 4.3, according to the geographical coordinates of the second reference point, the length of the optical cable between the second reference point and the access end of the target optical cable, and the length of the optical cable between the fault point and the access end of the target optical cable, the second reference point is drawn on the map. 2. coverage;

步骤4.4,选取轨迹覆盖范围、第一覆盖范围和第二覆盖范围的重合处为目标地理范围。In step 4.4, the overlap of the track coverage area, the first coverage area and the second coverage area is selected as the target geographical area.

进一步的,步骤4.1具体包括:Further, step 4.1 specifically includes:

以第一基准点的地理坐标和第二基准点的地理坐标为焦点,根据第一基准点与目标光缆的接入端头之间的光缆长度以及第二基准点与目标光缆的接入端头之间的光缆长度在地图上绘制椭圆,该椭圆合围的范围为轨迹覆盖范围。Taking the geographic coordinates of the first reference point and the geographic coordinates of the second reference point as the focus, according to the length of the optical cable between the first reference point and the access end of the target optical cable and the second reference point and the access end of the target optical cable The cable length between draws an ellipse on the map, and the area enclosed by the ellipse is the track coverage area.

进一步的,在步骤4.1中,采用如下方式绘制椭圆:Further, in step 4.1, draw an ellipse in the following manner:

在地图上建立X0Y直角坐标系;第一基准点的地理坐标和第二基准点的地理坐标均位于X0Y直角坐标系的X轴上,并相对于Y轴对称;Establish an X0Y rectangular coordinate system on the map; the geographic coordinates of the first reference point and the second reference point are located on the X axis of the X0Y rectangular coordinate system and are symmetrical to the Y axis;

按方程(X2÷A2)+(Y2÷B2)=1绘制椭圆;Draw an ellipse according to the equation (X 2 ÷ A 2 )+(Y 2 ÷ B 2 )=1;

Figure BDA0003371055500000031
Figure BDA0003371055500000031

Figure BDA0003371055500000032
Figure BDA0003371055500000032

其中,X表示椭圆上任意一点在X0Y直角坐标系中X轴上的坐标值,Y表示椭圆上任意一点在X0Y直角坐标系中Y轴上的坐标值,L1表示第一基准点与目标光缆的接入端头之间的光缆长度,L2表示第二基准点与目标光缆的接入端头之间的光缆长度,L0表示第一基准点与第二基准点之间的直线距离。Among them, 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 first reference point and the target optical cable The length of the optical cable between the access ends of the target optical cable, L 2 indicates the length of the optical cable between the second reference point and the access end of the target optical cable, and L 0 indicates the straight-line distance between the first reference point and the second reference point.

进一步的,步骤4.2具体包括:Further, step 4.2 specifically includes:

在地图上以第一基准点的地理坐标为圆心,以R1为半径画圆,该圆合围的范围为第一覆盖范围;Draw a circle on the map with the geographic coordinates of the first reference point as the center and R1 as the radius, and the area enclosed by the circle is the first coverage area;

其中,R1=|L1-L3|,L1表示第一基准点与目标光缆的接入端头之间的光缆长度,L3表示故障点与目标光缆的接入端头之间的光缆长度。Among them, R 1 =|L 1 -L 3 |, L 1 represents the length of the optical cable between the first reference point and the access end of the target optical cable, L 3 represents the distance between the fault point and the access end of the target optical cable Cable length.

进一步的,步骤4.3具体包括:Further, step 4.3 specifically includes:

在地图上以第二基准点的地理坐标为圆心,以R2为半径画圆,该圆合围的范围为第二覆盖范围;Draw a circle on the map with the geographic coordinates of the second reference point as the center and R2 as the radius, and the area enclosed by the circle is the second coverage area;

其中,R2=|L2-L3|,L2表示第二基准点与目标光缆的接入端头之间的光缆长度,L3表示故障点与目标光缆的接入端头之间的光缆长度。Among them, R 2 =|L 2 -L 3 |, L 2 represents the length of the optical cable between the second reference point and the access end of the target optical cable, L 3 represents the distance between the fault point and the access end of the target optical cable Cable length.

进一步的,在铺设光缆时执行步骤1。Further, step 1 is performed when laying the optical cable.

进一步的,在步骤1中,按光缆长度在目标光缆上等间距选取基准点。Further, in step 1, reference points are selected at equal intervals on the target optical cable according to the length of the optical cable.

进一步的,基准点之间的间距为300-600米。Further, the distance between the reference points is 300-600 meters.

本发明的技术方案至少具有如下优点和有益效果:The technical solution of the present invention has at least the following advantages and beneficial effects:

本发明实施例提供的光缆故障点定位方法,能够将故障点的搜寻范围缩小至目标地理范围内,从而大大降低了搜寻故障点的难度,降低了搜寻故障点的时间,有利于快速抢修光缆。The method for locating the fault point of the optical cable provided by the embodiment of the present invention can narrow the search range of the fault point to the target geographical range, thereby greatly reducing the difficulty of searching for the fault point and the time for searching for the fault point, which is conducive to rapid repair of the optical cable.

附图说明Description of drawings

为了更清楚的说明本发明实施例的技术方案,下面对实施例中需要使用的附图作简单介绍。应当理解,以下附图仅示出了本发明的某些实施方式,不应被看作是对本发明范围的限制。对于本领域技术人员而言,在不付出创造性劳动的情况下,能够根据这些附图获得其他附图。In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the drawings that need to be used in the embodiments are briefly introduced below. It should be understood that the following drawings only illustrate some embodiments of the present invention, and should not be considered as limiting the scope of the present invention. Those skilled in the art can obtain other drawings based on these drawings without creative effort.

图1为本申请实施例提供的光缆故障点定位方法的示意图;FIG. 1 is a schematic diagram of a method for locating an optical cable fault point provided by an embodiment of the present application;

图2为本申请实施例提供的光缆故障点定位方法中,绘制椭圆的示意图。FIG. 2 is a schematic diagram of drawing an ellipse in the method for locating an optical cable fault point provided by an embodiment of the present application.

图中:011-第一覆盖范围;012-第二覆盖范围;013-轨迹覆盖范围;014-目标地理范围;100-目标光缆;110-接入端头;210-一号基准点;220-二号基准点;230-三号基准点;300-故障点;400-光时域反射仪。In the figure: 011-first coverage; 012-second coverage; 013-trajectory coverage; 014-target geographical range; 100-target optical cable; 110-access terminal; 210-first reference point; 220- No. 2 reference point; 230-No. 3 reference point; 300-fault point; 400-optical time domain reflectometer.

具体实施方式Detailed ways

为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合附图,对本发明实施例中的技术方案进行清楚、完整的描述。显然,所描述的实施例是本发明的一部分实施例,而不是全部的实施例。In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some, not all, embodiments of the present invention.

因此,以下对本发明的实施例的详细描述并非旨在限制要求保护的本发明的范围,而是仅仅表示本发明的部分实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

需要说明的是,在不冲突的情况下,本发明中的实施例及实施例中的特征和技术方案可以相互组合。It should be noted that, in the case of no conflict, the embodiments of the present invention and the features and technical solutions in the embodiments can be combined with each other.

应注意到:相似的标号和字母在下面的附图中表示类似项,因此,一旦某一项在一个附图中被定义,则在随后的附图中不需要对其进行进一步定义和解释。It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

在本发明的描述中,需要说明的是,术语“第一”、“第二”等仅用于区分描述,而不能理解为指示或暗示相对重要性。In the description of the present invention, it should be noted that the terms "first", "second" and so on are only used for distinguishing descriptions, and should not be understood as indicating or implying relative importance.

实施例:Example:

本实施例提供一种光缆故障点定位方法,图1是本实施例提供的光缆故障点定位方法的示意图。参照图1,光缆故障点定位方法包括如下步骤。This embodiment provides a method for locating an optical cable fault point, and FIG. 1 is a schematic diagram of the method for locating an optical cable fault point provided by this embodiment. Referring to Fig. 1, the method for locating an optical cable fault point includes the following steps.

步骤1:在目标光缆100上选取多个基准点,记录基准点的地理坐标,记录基准点与目标光缆100的接入端头110之间的光缆长度。Step 1: Select multiple reference points on the target optical cable 100 , record the geographic coordinates of the reference points, and record the cable length between the reference points and the access end 110 of the target optical cable 100 .

为了提高效率,本步骤在铺设光缆时进行。可以理解的,在其他实施方式中,也可以在光缆铺设完成后再执行步骤1。In order to improve efficiency, this step is performed when laying optical cables. It can be understood that, in other implementation manners, step 1 may also be performed after the laying of the optical cable is completed.

为了便于说明,在本实施例中,在目标光缆100上选取三个基准点,分别是一号基准点210、二号基准点220和三号基准点230。记录各个基准点的地理坐标。相邻的基准点之间的光缆长度为500米,一号基准点210与接入端头110之间的光缆长度也为500米。可以理解的,在其他实施方式中,相邻的基准点之间的光缆长度可以采用其他值。相邻的基准点之间的光缆长度越小,对故障点300的定位就越准确。相邻的基准点之间的光缆长度越大,执行步骤1所花费的成本越低。为了平衡步骤1的执行成本和对故障点300的定位准确度,可以将相邻的基准点之间的光缆长度设置成300-600米。在其他实施方式中,相邻的基准点之间的光缆长度也可以是不同的。For the convenience of description, in this embodiment, three reference points are selected on the target optical cable 100 , namely the first reference point 210 , the second reference point 220 and the third reference point 230 . Record the geographic coordinates of each datum point. The length of the optical cable between adjacent reference points is 500 meters, and the length of the optical cable between the first reference point 210 and the access terminal 110 is also 500 meters. It can be understood that in other implementation manners, the length of the optical cable between adjacent reference points may adopt other values. The smaller the length of the optical cable between adjacent reference points, the more accurate the location of the fault point 300 is. The greater the length of the optical cable between adjacent reference points, the lower the cost of performing step 1. In order to balance the execution cost of step 1 and the positioning accuracy of the fault point 300, the length of the optical cable between adjacent reference points can be set to 300-600 meters. In other implementation manners, the lengths of optical cables between adjacent reference points may also be different.

需要指出的是,为了便于说明,在图1中绘制出了目标光缆100的延伸轨迹。本实施例提供的光缆故障点定位方法在实际实施时,是不知道目标光缆100的具体延伸轨迹的,只知道接入端头110以及各个基准点的地理坐标。It should be noted that, for the convenience of illustration, the extension track of the target optical cable 100 is drawn in FIG. 1 . The method for locating the fault point of the optical cable provided in this embodiment does not know the specific extension track of the target optical cable 100 during actual implementation, but only knows the geographic coordinates of the access terminal 110 and each reference point.

步骤2:通过光时域反射仪400获得目标光缆100的故障点300与目标光缆100的接入端头110之间的光缆长度。Step 2: Obtain the optical cable length between the fault point 300 of the target optical cable 100 and the access end 110 of the target optical cable 100 through the optical time domain reflectometer 400 .

将光时域反射仪400连接在接入端头110上,通过光时域反射仪400即可获得故障点300与目标光缆100的接入端头110之间的光缆长度。在本实施例中,通过光时域反射仪400检测得到故障点300与目标光缆100的接入端头110之间的光缆长度为720米。The optical time domain reflectometer 400 is connected to the access terminal 110 , and the optical cable length between the fault point 300 and the access terminal 110 of the target optical cable 100 can be obtained through 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 detected by the optical time domain reflectometer 400 is 720 meters.

需要指出的是,为了便于说明,在图1中标出了故障点300的具体位置。本实施例提供的光缆故障点定位方法在实际实施时,是不知道故障点300的具体位置的,只知道故障点300与目标光缆100的接入端头110之间的光缆长度。It should be noted that, for the convenience of description, the specific location of the fault point 300 is marked in FIG. 1 . The method for locating an optical cable fault point provided by this embodiment does not know the specific location of the fault point 300 during actual implementation, but only the length of the optical cable between the fault point 300 and the access terminal 110 of the target optical cable 100 .

步骤3:根据与目标光缆100的接入端头110之间的光缆长度选择位于故障点300两侧的两个基准点,将位于故障点300两侧的两个基准点分别称为第一基准点和第二基准点。Step 3: Select two reference points located on both sides of the fault point 300 according to the cable length between the access terminal 110 of the target optical cable 100, and call the two reference points located on both sides of the fault point 300 respectively the first reference point point and the second reference point.

在本实施例中,一号基准点210与接入端头110之间的光缆长度为500米,二号基准点220与接入端头110之间的光缆长度为1000米。因此,一号基准点210被称为第一基准点,二号基准点220被称为第二基准点。In this embodiment, the length of the optical cable between the first reference point 210 and the access terminal 110 is 500 meters, and the length of the optical cable between the second reference point 220 and the access terminal 110 is 1000 meters. Therefore, the first reference point 210 is called a first reference point, and the second reference point 220 is called a second reference point.

步骤4:根据第一基准点(一号基准点210)的地理坐标、第二基准点(二号基准点220)的地理坐标、第一基准点(一号基准点210)与目标光缆100的接入端头110之间的光缆长度、第二基准点(二号基准点220)与目标光缆100的接入端头110之间的光缆长度以及故障点300与目标光缆100的接入端头110之间的光缆长度在地图上绘制包含故障点300的目标地理范围014。Step 4: According to the geographic coordinates of the first reference point (No. 1 reference point 210), the geographic coordinates of the second reference point (No. 2 reference point 220), the first reference point (No. 1 reference point 210) and the target optical cable 100 The length of the optical cable between the access terminals 110, the length of the optical cable between the second reference point (No. 2 reference point 220) and the access terminal 110 of the target optical cable 100, and the access terminal of the fault point 300 and the target optical cable 100 The length of fiber optic cable between 110 plots on the map the target geographic range 014 containing the point of failure 300 .

具体的,步骤4还包括以下步骤。Specifically, step 4 also includes the following steps.

步骤4.1,根据第一基准点(一号基准点210)的地理坐标、第二基准点(二号基准点220)的地理坐标、第一基准点(一号基准点210)与目标光缆100的接入端头110之间的光缆长度以及第二基准点(二号基准点220)与目标光缆100的接入端头110之间的光缆长度在地图上绘制第一基准点(一号基准点210)和第二基准点(二号基准点220)之间光缆所有可能的延伸轨迹所覆盖的范围,该范围为轨迹覆盖范围013。Step 4.1, according to the geographic coordinates of the first reference point (No. 1 reference point 210), the geographic coordinates of the second reference point (No. 2 reference point 220), the first reference point (No. 1 reference point 210) and the target optical cable 100 The cable length between the access terminals 110 and the cable length between the second reference point (No. 2 reference point 220) and the access terminal 110 of the target optical cable 100 draw the first reference point (No. 1 reference point) on the map 210) and the second reference point (No. 2 reference point 220), the range covered by all possible extension trajectories of the optical cable is the trajectory coverage range 013.

具体的,以第一基准点(一号基准点210)的地理坐标和第二基准点(二号基准点220)的地理坐标为焦点,根据第一基准点(一号基准点210)与目标光缆100的接入端头110之间的光缆长度以及第二基准点(二号基准点220)与目标光缆100的接入端头110之间的光缆长度在地图上绘制椭圆,该椭圆合围的范围为轨迹覆盖范围013。Specifically, with the geographic coordinates of the first reference point (No. 1 reference point 210) and the geographic coordinates of the second reference point (No. 2 reference point 220) as the focus, according to the first reference point (No. 1 reference point 210) and the target The cable length between the access end 110 of the optical cable 100 and the cable length between the second reference point (No. 2 reference point 220) and the access end 110 of the target optical cable 100 draw an ellipse on the map, and the ellipse encloses The scope is Track Coverage 013.

图2为本实施例提供的光缆故障点定位方法中,绘制椭圆的示意图。请参照图2,采用如下方式绘制椭圆:FIG. 2 is a schematic diagram of drawing an ellipse in the method for locating an optical cable fault point provided in this embodiment. Please refer to Figure 2 to draw an ellipse as follows:

在地图上建立X0Y直角坐标系;第一基准点(一号基准点210)的地理坐标和第二基准点(二号基准点220)的地理坐标均位于X0Y直角坐标系的X轴上,并相对于Y轴对称;Set up the X0Y rectangular coordinate system on the map; The geographic coordinates of the first reference point (No. 1 reference point 210) and the geographic coordinates of the second reference point (No. 2 reference point 220) are all located on the X axis of the X0Y rectangular coordinate system, and Symmetrical with respect to the Y axis;

按方程(X2÷A2)+(Y2÷B2)=1绘制椭圆;Draw an ellipse according to the equation (X 2 ÷ A 2 )+(Y 2 ÷ B 2 )=1;

Figure BDA0003371055500000091
Figure BDA0003371055500000091

Figure BDA0003371055500000092
Figure BDA0003371055500000092

其中,X表示椭圆上任意一点在X0Y直角坐标系中X轴上的坐标值,Y表示椭圆上任意一点在X0Y直角坐标系中Y轴上的坐标值,L1表示第一基准点(一号基准点210)与目标光缆100的接入端头110之间的光缆长度,L2表示第二基准点(二号基准点220)与目标光缆100的接入端头110之间的光缆长度,L0表示第一基准点(一号基准点210)与第二基准点(二号基准点220)之间的直线距离。在本实施例中,第一基准点(一号基准点210)与第二基准点(二号基准点220)之间的直线距离为400米。Among them, 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, and L1 represents the first reference point (No. The length of the cable between the reference point 210) and the access terminal 110 of the target optical cable 100, L represents the cable length between the second reference point (No. 2 reference point 220) and the access terminal 110 of the target cable 100, L 0 represents the linear distance between the first reference point (No. 1 reference point 210 ) and the second reference point (No. 2 reference point 220 ). In this embodiment, the linear distance between the first reference point (No. 1 reference point 210 ) and the second reference point (No. 2 reference point 220 ) is 400 meters.

在本实施例中,L1=500,L2=1000,L0=400。经过计算得到:In this embodiment, L 1 =500, L 2 =1000, and L 0 =400. Calculated to get:

Figure BDA0003371055500000093
Figure BDA0003371055500000093

Figure BDA0003371055500000094
Figure BDA0003371055500000094

即,根据方程(X2÷2502)+(Y2÷1502)=1绘制椭圆。That is, an ellipse is drawn according to the equation (X 2 ÷ 250 2 )+(Y 2 ÷150 2 )=1.

步骤4.2:根据第一基准点(一号基准点210)的地理坐标、第一基准点(一号基准点210)与目标光缆100的接入端头110之间的光缆长度以及故障点300与目标光缆100的接入端头110之间的光缆长度在地图上绘制第一覆盖范围011。Step 4.2: According to the geographic coordinates of the first reference point (No. 1 reference point 210), the length of the optical cable between the first reference point (No. 1 reference point 210) and the access terminal 110 of the target optical cable 100, and the fault point 300 and The length of the cable between the entry ends 110 of the target cable 100 plots a first coverage area 011 on the map.

具体的,在地图上以第一基准点(一号基准点210)的地理坐标为圆心,以R1为半径画圆,该圆合围的范围为第一覆盖范围011;Specifically, draw a circle with the geographic coordinates of the first reference point (No. 1 reference point 210) on the map as the center and R1 as the radius, and the range enclosed by the circle is the first coverage area 011;

其中,R1=|L1-L3|,L1表示第一基准点(一号基准点210)与目标光缆100的接入端头110之间的光缆长度,L3表示故障点300与目标光缆100的接入端头110之间的光缆长度。Wherein, R 1 =|L 1 -L 3 |, L 1 represents the length of the optical cable between the first reference point (No. 1 reference point 210) and the access end 110 of the target optical cable 100, and L 3 represents the distance between the fault point 300 and The length of the fiber optic cable between the entry ends 110 of the target fiber optic cable 100 .

在本实施例中,L1=500,L3=720。计算得到R1=220。In this embodiment, L 1 =500, L 3 =720. R 1 =220 is calculated.

步骤4.3,根据第二基准点(二号基准点220)的地理坐标、第二基准点(二号基准点220)与目标光缆100的接入端头110之间的光缆长度以及故障点300与目标光缆100的接入端头110之间的光缆长度在地图上绘制第二覆盖范围012。Step 4.3, according to the geographic coordinates of the second reference point (No. 2 reference point 220), the length of the optical cable between the second reference point (No. 2 reference point 220) and the access terminal 110 of the target optical cable 100, and the fault point 300 and The length of the cable between the entry ends 110 of the target cable 100 plots a second coverage area 012 on the map.

具体的,在地图上以第二基准点(二号基准点220)的地理坐标为圆心,以R2为半径画圆,该圆合围的范围为第二覆盖范围012;Specifically, on the map, take the geographic coordinates of the second reference point (No. 2 reference point 220) as the center of the circle, and draw a circle with R as the radius, and the range enclosed by the circle is the second coverage area 012;

其中,R2=|L2-L3|,L2表示第二基准点(二号基准点220)与目标光缆100的接入端头110之间的光缆长度,L3表示故障点300与目标光缆100的接入端头110之间的光缆长度。Wherein, R 2 =|L 2 -L 3 |, L 2 represents the length of the optical cable between the second reference point (No. 2 reference point 220) and the access end 110 of the target optical cable 100, and L 3 represents the distance between the fault point 300 and The length of the fiber optic cable between the entry ends 110 of the target fiber optic cable 100 .

在本实施例中,L2=1000,L3=720。计算得到R2=280。In this embodiment, L 2 =1000, L 3 =720. R 2 =280 was calculated.

步骤4.4,选取轨迹覆盖范围013、第一覆盖范围011和第二覆盖范围012的重合处为目标地理范围014。In step 4.4, the overlap of the trajectory coverage area 013, the first coverage area 011 and the second coverage area 012 is selected as the target geographic area 014.

步骤5:根据目标地理范围014寻找故障点300。Step 5: Find the fault point 300 according to the target geographical range 014 .

通过本实施例提供的光缆故障点定位方法,能够将故障点300的搜寻范围缩小至目标地理范围014内,从而大大降低了搜寻故障点300的难度,降低了搜寻故障点300的时间,有利于快速抢修光缆。By the optical cable fault location method provided in this embodiment, the search range of the fault point 300 can be narrowed to the target geographic range 014, thereby greatly reducing the difficulty of searching for the fault point 300 and reducing the time for searching for the fault point 300, which is beneficial Quickly repair fiber optic cables.

以上所述仅为本发明的部分实施例而已,并不用于限制本发明,对于本领域技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。The above descriptions are only some embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within 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;
Figure FDA0004009461450000031
Figure FDA0004009461450000032
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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Publication number Priority date Publication date Assignee Title
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
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