Optical fiber network fault location method and system

Abstract

The present application discloses a method and system for locating optical fiber network faults, the method comprising: dividing the optical cable to be tested based on the shape structure of the optical cable to be tested to obtain the result of optical cable area division; obtaining the minimum detection frequency of the optical cable based on the historical use of the optical cable to be tested; obtaining the regional detection frequency of each area of ​​the optical cable to be tested based on the surrounding environment of the optical cable to be tested, the minimum detection frequency of the optical cable and the result of the optical cable area division; detecting whether the connection position of the optical cable to be tested is faulty based on an optical power meter, and outputting the connection fault location information if it is faulty; using an optical time domain reflectometer to detect whether each area is faulty based on the result of the optical cable area division and the regional detection frequency, and determining the specific fault point to obtain the optical cable fault location information if it is faulty; sending the connection fault location information and the optical cable fault location information to the remote user end, and performing maintenance or replacement when the connection fault location information and the optical cable fault location information are received. The present application has the effect of improving the accuracy of optical fiber network fault location.

Description

Technical Field

[0001] The present application relates to the technical field of optical fiber fault location, and in particular to an optical fiber network fault location method and system. Background Art

[0002] At present, optical fiber is a soft and transparent fiber used to transmit optical signals, usually made of materials such as glass or plastic. Optical fiber plays a key role in the field of modern communications. Transmitting optical signals through optical fiber can achieve high-speed and large-capacity data transmission. Due to the low loss and high bandwidth characteristics of optical fiber, it is widely used in communication systems such as the Internet, telephone networks, and cable TV. When a fiber optic network fails, replacing all the optical fibers in the entire optical cable will require a lot of manpower and material resources, so it is very important to locate the fiber optic network fault.

[0003] The existing fiber optic network fault location system confirms the specific manifestation of the fault through user feedback or system monitoring, and then tests the optical cable based on the optical time domain reflectometer, analyzes the test data, and determines whether there are abnormal conditions such as breakage or damage in the optical cable. However, the resolution of the optical time domain reflectometer in the existing fiber optic network fault location system is limited by the pulse width, and it cannot provide accurate positioning for faults within a shorter distance. There are also blind spots at the end of the optical fiber or near the optical fiber connector, which makes the optical time domain reflectometer unable to effectively detect faults at a closer distance. The detection accuracy of fiber optic network fault location is low, and there is room for improvement. Summary of the invention

[0004] In order to improve the accuracy of locating optical fiber network faults, the present application provides an optical fiber network fault locating method and system.

[0005] The present application provides a method for locating optical fiber network faults, which adopts the following technical solutions:

[0006] In a first aspect, a method for locating a fault in an optical fiber network comprises the following steps:

[0007] Based on the shape structure of the optical cable to be tested, the optical cable to be tested is divided into regions to obtain the optical cable region division result;

[0008] Determine the frequency of testing the optical cable to be tested based on the historical usage of the optical cable to be tested to obtain the minimum testing frequency of the optical cable;

[0009] Based on the surrounding environment of the optical cable to be tested, the minimum detection frequency of the optical cable and the result of the optical cable area division, the regional detection frequency of each area of ​​the optical cable to be tested is obtained;

[0010] Using an optical power meter to detect whether a fault occurs at the connection position of the optical cable to be tested, and if a fault occurs, outputting the connection fault position information;

[0011] According to the optical cable area division results and the regional detection frequency, use the optical time domain reflectometer to detect each area to determine whether a fault occurs. If a fault occurs, determine the specific fault point to obtain the optical cable fault location information;

[0012] The connection fault location information and the optical cable fault location information are sent to the remote user end. When the connection fault location information and the optical cable fault location information are received, the optical cable to be tested is repaired or replaced.

[0013] Preferably, design and construction information of the optical cable to be tested is obtained, wherein the design and construction information of the optical cable to be tested includes optical cable connection position information, optical cable model information, and optical cable material information;

[0014] Dividing the optical cable to be tested based on the optical cable connection position information to obtain a first area division result;

[0015] Determine minimum bending radius information based on the optical cable model information, and pre-set bending threshold information based on the minimum bending radius;

[0016] Detecting the shape of the optical cable to be tested to obtain the shape information of the optical cable, detecting the bending angle of the bending part of the optical cable to be tested based on the shape information of the optical cable to obtain the bending degree information, if the bending degree information of the bending part of the optical cable to be tested is compared with the preset bending degree threshold information, marking the bending part whose bending degree information is greater than the bending degree threshold information as a characteristic bending point;

[0017] Based on the first area division result, the optical cable to be tested is divided again according to the characteristic bending points to obtain a second area division result;

[0018] Obtaining the material quality of the optical cable based on the optical cable material information of the optical cable to be tested, and determining the maximum area length of the optical cable to be tested based on the material quality of the optical cable;

[0019] Compare the length of each area in the second area division result with the maximum area length. If the length of each area in the second area division result is less than or equal to the maximum area length, no change is required. If the length of each area in the second area division result is greater than the maximum area length, divide the area evenly until the length of the divided area is less than or equal to the maximum area length and output the optical cable area division result.

[0020] Preferably, the historical usage of the optical cable to be tested is obtained, wherein the historical usage of the optical cable to be tested includes historical service life information and historical fault information;

[0021] Based on the historical service life information, the service life impact coefficient AN is obtained;

[0022] The historical fault information includes historical fault frequency information AT and historical fault degree information AC. According to the historical fault frequency information AT and the historical fault degree information AC, the historical fault influence coefficient AG is calculated based on the historical fault correlation function AG=a1×AT+a2×AC, where a1 and a2 are proportional factors and are both greater than 0;

[0023] According to the service life influence coefficient AN and the historical failure influence coefficient AG, the historical service influence coefficient AR is calculated based on the historical correlation function AR=a3×AN+a4×AG, where a3 and a4 are proportional factors and are both greater than 0;

[0024] The minimum inspection frequency of the optical cable to be tested is determined based on the historical usage impact coefficient AR.

[0025] Preferably, based on the optical cable area division result, the physical environment of each area of ​​the optical cable to be tested is detected to obtain physical environment information, wherein the physical environment information includes vehicle crushing degree information BN of the optical cable to be tested and surrounding construction distance information BS of the optical cable to be tested;

[0026] According to the vehicle crushing degree information BN and the surrounding construction distance information BS, the physical damage coefficient BW of each area of ​​the optical cable to be tested is calculated based on the physical damage correlation function BW=b1×BN+b2×BS, where b1 and b2 are proportional factors and are both greater than 0;

[0027] Based on the optical cable area division results, the corrosiveness of the soil in each area of ​​the optical cable to be tested is detected to obtain soil corrosiveness information, and the chemical damage coefficient BH of each area of ​​the optical cable to be tested is obtained based on the soil corrosiveness information;

[0028] Based on the optical cable area division results, the insect situation in the soil of each area of ​​the optical cable to be tested is detected to obtain insect information, wherein the insect information includes insect species information and insect quantity information BV;

[0029] Obtain an insect gnawing performance table, search the insect gnawing performance table based on the insect species information to obtain the gnawing ability of the insect species, and obtain the insect species influence coefficient BL based on the gnawing ability of the insect species;

[0030] According to the insect quantity information BV and the insect species influence coefficient BL, the biological damage coefficient BM of each area of ​​the optical cable to be tested is calculated based on the biological damage correlation function BM=b3×BV+b4×BL, where b3 and b4 are proportional factors and are both greater than 0;

[0031] The physical damage coefficient BW, chemical damage coefficient BH and biological damage coefficient BM of each area of ​​the optical cable to be tested are added together to obtain the external damage coefficient BQ of each area of ​​the optical cable to be tested;

[0032] Determine the degree of increase in detection frequency of each area of ​​the optical cable to be tested based on the external damage coefficient BQ of each area of ​​the optical cable to be tested, wherein the greater the external damage coefficient BQ of each area of ​​the optical cable to be tested, the higher the degree of increase in detection frequency of each area of ​​the optical cable to be tested;

[0033] Based on the minimum detection frequency of the optical cable and the increase degree of the detection frequency of each area of ​​the optical cable to be tested, the regional detection frequency of each area of ​​the optical cable to be tested is obtained.

[0034] Preferably, an optical power meter is obtained and a signal connection link is established between the optical power meter and the optical cable to be tested;

[0035] According to the optical cable connection position information, the optical power meter performs fault detection on the connection position of the optical cable to be tested, determines whether a connection device fails, and outputs connection fault position information if a failure occurs.

[0036] Preferably, each area in the optical cable area division result is detected based on an optical time domain reflectometer to determine whether a fault occurs, and the area where the fault occurs is marked as an optical fiber fault area, wherein the detection frequency of each area of ​​the optical cable to be tested by the optical time domain reflectometer is the regional detection frequency;

[0037] Based on the GIS positioning device, the optical fiber of the optical cable to be tested is positioned and an optical fiber model is established, the optical fiber fault area is marked on the optical fiber model, the flow extension state of the fluid in the optical fiber fault area is simulated based on the optical fiber model to obtain a fluid motion curve, and based on the fluid motion curve, it is determined whether there is an optical fiber breakage in the optical fiber fault area. If there is an optical fiber breakage, the optical fiber fault area with the optical fiber breakage is marked as an optical fiber breakage fault area and the optical fiber breakage point position information is output;

[0038] The thickness of each wrapping layer in the optical fiber fault area is detected by an ultrasonic thickness gauge to obtain wrapping thickness information of each wrapping layer;

[0039] Obtaining original thickness information of each wrapping layer in the optical fiber fault area, and comparing each wrapping thickness information with the original thickness information of each wrapping layer to obtain a wrapping layer thickness comparison result;

[0040] Based on the comparison result of the coating thickness, it is judged whether the coating layers in the optical fiber fault area are corroded. If the coating thickness information is less than the original thickness information, corrosion exists. If corrosion exists, the optical fiber fault area with corrosion is marked as an optical fiber corrosion area, the location where the corrosion exists is located, and the location information of the optical cable corrosion point is output;

[0041] The optical fiber break point location information and the optical cable corrosion point location information are combined to form the optical cable fault location information.

[0042] Preferably, a wireless communication module is obtained and a signal connection link is established between the wireless communication module and the optical cable to be tested;

[0043] Sending the connection fault location information, the optical fiber break point location information and the optical cable corrosion point location information to a remote user terminal based on a wireless communication module;

[0044] When the connection fault location information is received, the optical fiber connector is replaced based on the connection fault location information;

[0045] When the optical fiber break point location information is received, the optical fiber inside the optical fiber break fault area is replaced;

[0046] When the location information of the optical cable corrosion point is received, the outer wall repair material is modulated and the location of the optical cable corrosion point is repaired using the outer wall repair material.

[0047] In a second aspect, the present application provides a fiber optic network fault location system, which adopts the following technical solution:

[0048] An optical fiber network fault location system, comprising:

[0049] A region division module is configured to divide the optical cable to be tested into regions based on the shape of the optical cable to be tested to obtain an optical cable region division result;

[0050] A detection frequency analysis module is configured to determine the detection frequency of the optical cable to be tested based on the historical usage of the optical cable to be tested to obtain the minimum detection frequency of the optical cable;

[0051] A regional detection analysis module is configured to obtain the regional detection frequency of each area of ​​the optical cable to be tested based on the surrounding environment of the optical cable to be tested, the minimum detection frequency of the optical cable and the result of the optical cable area division;

[0052] A connection fault analysis module is configured to detect whether a connection position of the optical cable to be tested has a fault based on an optical power meter, and output connection fault position information if a fault occurs;

[0053] The regional fault analysis module is configured to use an optical time domain reflectometer to detect each area according to the optical cable area division result and the regional detection frequency to determine whether a fault occurs. If a fault occurs, the specific fault point is determined to obtain the optical cable fault location information;

[0054] The repair and replacement module is configured to send the connection fault location and the optical cable fault point location to the remote user end, and when received, the optical cable to be tested is repaired or replaced based on the connection fault location information and the optical cable fault location information.

[0055] In summary, the present application includes at least one of the following beneficial technical effects:

[0056] 1. The optical cable to be tested is divided into regions according to the shape structure of the optical cable to be tested to obtain the result of the optical cable region division, the minimum detection frequency of the optical cable to be tested is determined according to the historical use of the optical cable to be tested, and the regional detection frequency of each region of the optical cable to be tested is obtained according to the surrounding environment of the optical cable to be tested, the minimum detection frequency of the optical cable and the result of the optical cable region division, thereby improving the accuracy of the regional detection frequency of each region of the optical cable to be tested, detecting whether a fault occurs at the connection position of the optical cable to be tested according to an optical power meter, and outputting connection fault location information if a fault occurs, detecting each region according to an optical time domain reflectometer to determine whether a fault occurs, and determining the specific fault point to obtain the optical cable fault location information if a fault occurs, sending the connection fault location information and the optical cable fault location information to a remote user end, and determining whether the optical cable to be tested is to be repaired or replaced, thereby improving the accuracy of optical fiber network fault location;

[0057] 2. The physical damage coefficient BW of each area of ​​the optical cable to be tested is obtained by using the vehicle crushing degree information BN of the optical cable to be tested and the surrounding construction distance information BS of the optical cable to be tested. The chemical damage coefficient BH of each area of ​​the optical cable to be tested is obtained according to the corrosiveness of the soil in each area of ​​the optical cable to be tested. The insect species influence coefficient BL is obtained based on the insect species information. The biological damage coefficient BM of each area of ​​the optical cable to be tested is obtained according to the insect quantity information BV and the insect species influence coefficient BL. The physical damage coefficient BW, chemical damage coefficient BH and biological damage coefficient BM of each area of ​​the optical cable to be tested are added and calculated to obtain the external damage coefficient BQ of each area of ​​the optical cable to be tested. The degree of increase in the detection frequency of each area of ​​the optical cable to be tested is determined based on the external damage coefficient BQ of each area of ​​the optical cable to be tested, and then the regional detection frequency of each area of ​​the optical cable to be tested is obtained. The influence of the environmental information on the optical cable to be tested is analyzed, thereby improving the accuracy of the regional detection frequency of each area of ​​the optical cable to be tested, and further improving the detection accuracy of the optical fiber network fault;

[0058] 3. With the help of optical time domain reflectometer, each area in the optical cable area division result is detected to determine whether there is a fault, and the area with the fault is marked as the optical fiber fault area. Based on the GIS positioning equipment, the optical fiber of the optical cable to be tested is located and the optical fiber model is established. The flow extension state of the fluid in the optical fiber fault area is simulated based on the optical fiber model to determine whether there is a fiber break in the optical fiber fault area. If there is a fiber break, the optical fiber fault area with the fiber break is marked as the optical fiber break fault area and the optical fiber break point location information is output. Based on the ultrasonic thickness gauge, the thickness of each wrapping layer in the optical fiber fault area is detected and it is determined whether there is corrosion. If there is corrosion, the optical cable corrosion point location information is output. By determining the optical fiber break point location information and the optical cable corrosion point location information, the accuracy of optical fiber network fault location is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1This is a flow chart of a method for locating a fault in an optical fiber network according to the present embodiment;

[0060] Figure 2 This is a schematic diagram of the modules of the optical fiber network fault location system mainly embodied in this embodiment.

[0061] Figure numerals: 1. Area division module; 2. Detection frequency analysis module; 3. Area detection analysis module; 4. Connection fault analysis module; 5. Area fault analysis module; 6. Maintenance and replacement module. DETAILED DESCRIPTION

[0062] The present application is further described in detail below in conjunction with the accompanying drawings.

[0063] The embodiment of the present application discloses a method for locating optical fiber network faults.

[0064] A method for locating a fault in an optical fiber network comprises the following steps:

[0065] Reference Figure 1 Step S1, based on the shape structure of the optical cable to be tested, the optical cable to be tested is divided into regions to obtain the optical cable region division result. Step S1 specifically includes the following sub-steps:

[0066] Step S11, obtaining design and construction information of the optical cable to be tested, wherein the design and construction information of the optical cable to be tested includes optical cable connection position information, optical cable model information, and optical cable material information.

[0067] Step S12: dividing the optical cable to be tested based on the optical cable connection position information to obtain a first area division result.

[0068] Step S13, determining the minimum bending radius information based on the optical cable model information, wherein the minimum bending radius of different optical fibers is determined by the manufacturer, and different optical fibers are used in different optical cable models, so the minimum bending radius is different, and the bending threshold information is pre-set based on the minimum bending radius.

[0069] Step S14, detecting the shape of the optical cable to be tested to obtain the shape information of the optical cable, detecting the bending angle of the bending part of the optical cable to be tested based on the shape information of the optical cable to obtain the bending degree information, if the bending degree information of the bending part of the optical cable to be tested is compared with the preset bending degree threshold information, the bending part whose bending degree information is greater than the bending degree threshold information is marked as a characteristic bending point.

[0070] Step S15: Based on the first area division result, the optical cable to be tested is divided again according to the characteristic bending points to obtain a second area division result.

[0071] Step S16, obtaining the quality of the optical cable material based on the optical cable material information of the optical cable to be tested, wherein the optical cable is composed of an optical fiber, a filling layer and a multi-layer wrapping layer, determining the quality of the optical fiber according to the optical fiber model, determining the quality of the filling layer according to the filling layer material, wherein the multi-layer filling layer includes an armor layer and a plastic layer, determining the quality of the armor layer according to the armor layer material, determining the quality of the plastic layer according to the plastic layer material, and calculating the quality of the optical cable material by average according to the optical fiber quality, the filling layer quality, the armor layer quality and the plastic layer quality. Determine the maximum area length of the optical cable to be tested based on the quality of the optical cable material. The better the quality of the optical cable material, the larger the maximum area length of the optical cable to be tested.

[0072] Step S17, compare the length of each area in the second area division result with the maximum area length. If the length of each area in the second area division result is less than or equal to the maximum area length, no change is required. If the length of each area in the second area division result is greater than the maximum area length, the area is evenly divided until the length of the divided area is less than or equal to the maximum area length and the optical cable area division result is output.

[0073] In specific applications, the optical cable to be tested is divided according to the optical cable connection position information to obtain the first area division result, and the optical cable to be tested is divided again according to the optical cable model and the optical cable shape to obtain the second area division result, and the maximum area length of the optical cable to be tested is determined according to the material quality. The optical cable area division result is obtained according to the second area division result and the maximum area length of the optical cable to be tested. The optical cable to be tested is divided into areas, which provides data support for the detection of optical fiber network fault location.

[0074] Reference Figure 1 , step S2, based on the historical usage of the optical cable to be tested, determine the frequency of testing the optical cable to be tested to obtain the minimum testing frequency of the optical cable. Step S2 specifically includes the following sub-steps:

[0075] Step S21, obtaining the historical usage of the optical cable to be tested, where the historical usage of the optical cable to be tested includes historical usage years information and historical fault information.

[0076] Step S22, obtaining a service life impact coefficient AN based on the historical service life information, wherein the service life impact coefficient AN is positively correlated with the historical service life information.

[0077] Step S23, the historical fault information includes the historical fault frequency information AT and the historical fault severity information AC. According to the historical fault frequency information AT and the historical fault severity information AC, the historical fault influence coefficient AG is calculated based on the historical fault correlation function AG=a1×AT+a2×AC, where a1 and a2 are proportional factors and are both greater than 0.

[0078] Step S23, according to the service life influence coefficient AN and the historical failure influence coefficient AG, the historical use influence coefficient AR is calculated based on the historical correlation function AR=a3×AN+a4×AG, wherein a3 and a4 are proportional factors and are both greater than 0.

[0079] Step S24, determining a minimum optical cable detection frequency of the optical cable to be tested based on the historical usage impact coefficient AR, wherein the minimum optical cable detection frequency is positively correlated with the historical usage impact coefficient AR.

[0080] In specific applications, the optical cable is only detected when a fault occurs in the optical fiber network, which has an adverse impact on people's daily life. In the embodiment of the present application, the service life influence coefficient AN is obtained through the historical service life information of the optical cable to be tested, and the historical fault influence coefficient AG is obtained according to the historical fault number information AT and the historical fault degree information AC. The historical use influence coefficient AR is obtained by combining the service life influence coefficient AN and the historical fault influence coefficient AG. The minimum cable detection frequency of the optical cable to be tested based on the historical use influence coefficient AR improves the detection accuracy of optical fiber network faults.

[0081] Reference Figure 1 , step S3, based on the surrounding environment of the optical cable to be tested, the minimum detection frequency of the optical cable and the result of the optical cable area division, the regional detection frequency of each area of ​​the optical cable to be tested is obtained. Step S3 specifically includes the following sub-steps:

[0082] Step S31, based on the optical cable area division result, the physical environment of each area of ​​the optical cable to be tested is detected to obtain physical environment information, the physical environment information includes vehicle crushing degree information BN of the optical cable to be tested and surrounding construction distance information BS of the optical cable to be tested.

[0083] Step S32, according to the vehicle crushing degree information BN and the surrounding construction distance information BS, the physical damage coefficient BW of each area of ​​the optical cable to be tested is calculated based on the physical damage correlation function BW=b1×BN+b2×BS, where b1 and b2 are proportional factors and are both greater than 0.

[0084] Step S33: Based on the optical cable area division result, the corrosiveness of the soil in each area of ​​the optical cable to be tested is detected to obtain soil corrosiveness information, and the chemical damage coefficient BH of each area of ​​the optical cable to be tested is obtained based on the soil corrosiveness information. The stronger the soil corrosiveness, the greater the chemical damage coefficient.

[0085] Step S34, based on the optical cable area division result, detect the insect conditions in the soil of each area of ​​the optical cable to be tested to obtain insect information, wherein the insect information includes insect species information and insect quantity information BV.

[0086] Step S35, obtaining an insect gnawing performance table, searching the insect gnawing performance table based on the insect species information to obtain the insect species gnawing ability, and obtaining the insect species influence coefficient BL based on the insect species gnawing ability.

[0087] Step S36, according to the insect quantity information BV and the insect species influence coefficient BL, based on the biological damage correlation function BM=b3×BV+b4×BL, the biological damage coefficient BM of each area of ​​the optical cable to be tested is calculated, wherein b3 and b4 are proportional factors and are both greater than 0.

[0088] Step S37, comprehensively calculating the physical damage coefficient BW, the chemical damage coefficient BH and the biological damage coefficient BM of each area of ​​the optical cable to be tested by adding them together to obtain the external damage coefficient BQ of each area of ​​the optical cable to be tested.

[0089] Step S38, determining the degree of increase in detection frequency of each area of ​​the optical cable to be tested based on the external damage coefficient BQ of each area of ​​the optical cable to be tested, wherein the greater the external damage coefficient BQ of each area of ​​the optical cable to be tested, the higher the degree of increase in detection frequency of each area of ​​the optical cable to be tested.

[0090] Step S39, based on the minimum detection frequency of the optical cable and the degree of increase in the detection frequency of each area of ​​the optical cable to be tested, obtain the regional detection frequency of each area of ​​the optical cable to be tested.

[0091] In specific applications, the physical damage coefficient BW of each area of ​​the optical cable to be tested is obtained through the vehicle crushing degree information BN of the optical cable to be tested and the surrounding construction distance information BS of the optical cable to be tested. The chemical damage coefficient BH of each area of ​​the optical cable to be tested is obtained according to the corrosiveness of the soil in each area of ​​the optical cable to be tested. The insect species influence coefficient BL is obtained based on the insect species information. The biological damage coefficient BM of each area of ​​the optical cable to be tested is obtained according to the insect quantity information BV and the insect species influence coefficient BL. The physical damage coefficient BW, chemical damage coefficient BH and biological damage coefficient BM of each area of ​​the optical cable to be tested are added together to obtain the external damage coefficient BQ of each area of ​​the optical cable to be tested. Based on the external damage coefficient BQ of each area of ​​the optical cable to be tested, the increase degree of the detection frequency of each area of ​​the optical cable to be tested is determined, and then the regional detection frequency of each area of ​​the optical cable to be tested is obtained. The influence of the environmental information on the optical cable to be tested is analyzed, the accuracy of the regional detection frequency of each area of ​​the optical cable to be tested is improved, and the detection accuracy of the optical fiber network fault is further improved.

[0092] Reference Figure 1 Step S4, based on the optical power meter, detects whether a fault occurs at the connection position of the optical cable to be tested, and outputs connection fault position information if a fault occurs. Step S4 specifically includes the following sub-steps:

[0093] Step S41, obtaining an optical power meter and establishing a signal connection link between the optical power meter and the optical cable to be tested.

[0094] Step S42, according to the optical cable connection position information, based on the optical power meter, fault detection is performed on the connection position of the optical cable to be tested, and it is determined whether a connection device fails. If a failure occurs, the connection fault position information is output.

[0095] In specific applications, an optical power meter is used according to the optical cable connection position information to detect the connection position of the optical cable to be tested, and determine whether there is a fault at the connection position. If a fault occurs, the connection fault position information is output, thereby improving the accuracy of optical fiber network fault location.

[0096] Reference Figure 1 Step S5: Based on the optical cable area division result and the regional detection frequency, use an optical time domain reflectometer to detect each area to determine whether a fault occurs. If a fault occurs, determine the specific fault point to obtain the optical cable fault location information. Step S5 specifically includes the following sub-steps:

[0097] Step S51, based on the optical time domain reflectometer, each area in the optical cable area division result is detected to determine whether a fault occurs, and the area with the fault is marked as the optical fiber fault area, wherein the detection frequency of each area of ​​the optical cable to be tested by the optical time domain reflectometer is the area detection frequency.

[0098] Step S52, based on the GIS positioning equipment, the optical fiber of the optical cable to be tested is positioned and an optical fiber model is established, the optical fiber fault area is marked on the optical fiber model, and the flow extension state of the fluid in the optical fiber fault area is simulated based on the optical fiber model to obtain a fluid motion curve, and based on the fluid motion curve, it is determined whether there is an optical fiber breakage in the optical fiber fault area. If there is an optical fiber breakage, the optical fiber fault area with the optical fiber breakage is marked as an optical fiber breakage fault area and the optical fiber breakage point location information is output.

[0099] Step S53: Using an ultrasonic thickness gauge to detect the thickness of each coating layer in the optical fiber fault area, obtain coating thickness information of each coating layer.

[0100] Step S54, obtaining original thickness information of each wrapping layer in the optical fiber fault area, and comparing each wrapping thickness information with the original thickness information of each wrapping layer to obtain a wrapping layer thickness comparison result.

[0101] Step S55, based on the comparison result of the coating thickness, determine whether there is corrosion in the coating layers of the optical fiber fault area. If the coating thickness information is less than the original thickness information, corrosion exists. If corrosion exists, the optical fiber fault area with corrosion is marked as an optical fiber corrosion area, the position where the corrosion exists is located, and the position information of the optical cable corrosion point is output.

[0102] Step S56: The optical fiber break point location information and the optical cable corrosion point location information are combined to form the optical cable fault location information.

[0103] In specific applications, an optical time domain reflectometer is used to detect each area in the optical cable area division result to determine whether a fault occurs, and the area with the fault is marked as a fiber fault area. The optical fiber of the optical cable to be tested is located based on the GIS positioning equipment and a fiber model is established. The flow extension state of the fluid in the fiber fault area is simulated based on the fiber model to determine whether there is a fiber break in the fiber fault area. If there is a fiber break, the fiber fault area with the fiber break is marked as a fiber break fault area and the fiber break point location information is output. The thickness of each wrapping layer in the fiber fault area is detected based on an ultrasonic thickness gauge to determine whether there is corrosion. If there is corrosion, the cable corrosion point location information is output. By determining the fiber break point location information and the cable corrosion point location information, the accuracy of fiber network fault location is improved.

[0104] Reference Figure 1 , step S6, sending the connection fault location information and the optical cable fault location information to the remote user end, and when the connection fault location information and the optical cable fault location information are received, the optical cable to be tested is repaired or replaced. Step S6 specifically includes the following sub-steps:

[0105] Step S61, obtaining a wireless communication module and establishing a signal connection link between the wireless communication module and the optical cable to be tested.

[0106] Step S62: Send the connection fault location, fiber breakage location information and cable corrosion location information to the remote user terminal based on the wireless communication module. It should be noted that the wireless communication module in the embodiment of the present application refers to a wireless communication module based on wireless Bluetooth technology.

[0107] Step S63: When the connection fault location information is received, the optical fiber connector is replaced based on the connection fault location information.

[0108] Step S64: when the optical fiber break point location information is received, the optical fiber inside the optical fiber break fault area is replaced.

[0109] Step S65, when the location information of the optical cable corrosion point is received, the outer wall repair material is modulated and the location of the optical cable corrosion point is repaired using the outer wall repair material.

[0110] In specific applications, the connection fault location, fiber breakage point location information and optical cable corrosion point location information are sent to the remote user end through the wireless communication module. Based on the connection fault location, fiber breakage point location information and optical cable corrosion point location information, it is determined whether the optical cable to be tested needs to be repaired or replaced, thereby improving the accuracy of optical fiber network fault locating.

[0111] The embodiment of the present application also discloses a fiber optic network fault location system.

[0112] Reference Figure 2 , a fiber optic network fault location system includes a region division module, a detection frequency analysis module, a regional detection analysis module, a connection fault analysis module, a regional fault analysis module and a maintenance and replacement module.

[0113] The area division module is configured to divide the optical cable to be tested into areas based on the shape structure of the optical cable to be tested to obtain an optical cable area division result.

[0114] The detection frequency analysis module is configured to determine the detection frequency of the optical cable to be tested based on the historical usage of the optical cable to be tested to obtain the minimum detection frequency of the optical cable.

[0115] The regional detection analysis module is configured to obtain the regional detection frequency of each area of ​​the optical cable to be tested based on the surrounding environment of the optical cable to be tested, the minimum detection frequency of the optical cable and the result of the optical cable area division.

[0116] The connection fault analysis module is configured to detect whether a fault occurs at a connection position of the optical cable to be tested based on an optical power meter, and output connection fault position information if a fault occurs.

[0117] The regional fault analysis module is configured to use an optical time domain reflectometer to detect each area to determine whether a fault occurs based on the optical cable area division result and the regional detection frequency. If a fault occurs, the specific fault point is determined to obtain the optical cable fault location information.

[0118] The repair and replacement module is configured to send the connection fault location and the optical cable fault point location to the remote user end, and when received, the optical cable to be tested is repaired or replaced based on the connection fault location information and the optical cable fault location information.

[0119] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for locating a fault in an optical fiber network, characterized in that: The following steps are involved: Based on the shape structure of the optical cable to be tested, the optical cable to be tested is divided into regions to obtain the optical cable region division result; Specifically, it includes: obtaining design and construction information of the optical cable to be tested, wherein the design and construction information of the optical cable to be tested includes optical cable connection position information, optical cable model information and optical cable material information; dividing the optical cable to be tested based on the optical cable connection position information to obtain a first area division result; determining minimum bending radius information based on the optical cable model information, and presetting bending degree threshold information based on the minimum bending radius; detecting the shape of the optical cable to be tested to obtain optical cable shape information, detecting the bending angle of the bending part of the optical cable to be tested based on the optical cable shape information to obtain bending degree information, and if the bending degree information of the bending part of the optical cable to be tested is compared with the preset bending degree threshold information, the bending angle of the bending part of the optical cable to be tested is greater than the bending degree threshold information. The bending part is marked as a characteristic bending point; based on the first area division result, the optical cable to be tested is divided again according to the characteristic bending point to obtain a second area division result; based on the optical cable material information of the optical cable to be tested, the optical cable material quality is obtained, and the maximum area length of the optical cable to be tested is determined based on the optical cable material quality; the length of each area in the second area division result is compared with the maximum area length, if the length of each area in the second area division result is less than or equal to the maximum area length, there is no need to change it, if the length of each area in the second area division result is greater than the maximum area length, the area is evenly divided until the length of the divided area is less than or equal to the maximum area length and the optical cable area division result is output; Determine the frequency of testing the optical cable to be tested based on the historical usage of the optical cable to be tested to obtain the minimum testing frequency of the optical cable; Specifically, it includes: obtaining the historical usage of the optical cable to be tested, wherein the historical usage of the optical cable to be tested includes historical service life information and historical fault information; obtaining the service life influence coefficient AN based on the historical service life information; the historical fault information includes historical fault number information AT and historical fault degree information AC, and according to the historical fault number information AT and the historical fault degree information AC, obtaining the service life influence coefficient AN based on the historical fault correlation function The historical failure influence coefficient AG is calculated, where a1 and a2 are proportional factors and are both greater than 0; based on the service life influence coefficient AN and the historical failure influence coefficient AG, based on the historical correlation function Calculate and obtain the historical usage impact coefficient AR, where a3 and a4 are proportional factors and are both greater than 0; determine the minimum optical cable detection frequency of the optical cable to be tested based on the historical usage impact coefficient AR; Based on the surrounding environment of the optical cable to be tested, the minimum detection frequency of the optical cable and the result of the optical cable area division, the regional detection frequency of each area of ​​the optical cable to be tested is obtained; Specifically, it includes: based on the optical cable area division result, detecting the physical environment of each area of ​​the optical cable to be tested to obtain physical environment information, wherein the physical environment information includes vehicle crushing degree information BN of the optical cable to be tested and surrounding construction distance information BS of the optical cable to be tested; according to the vehicle crushing degree information BN and surrounding construction distance information BS, based on the physical damage correlation function The physical damage coefficient BW of each area of ​​the optical cable to be tested is obtained by calculation, wherein b1 and b2 are proportional factors and are both greater than 0; based on the optical cable area division result, the corrosiveness of the soil in each area of ​​the optical cable to be tested is detected to obtain soil corrosiveness information, and the chemical damage coefficient BH of each area of ​​the optical cable to be tested is obtained based on the soil corrosiveness information; based on the optical cable area division result, the insect situation of the soil in each area of ​​the optical cable to be tested is detected to obtain insect information, wherein the insect information includes insect species information and insect quantity information BV; an insect gnawing performance table is obtained, and the gnawing ability of the insect species is obtained by searching the insect gnawing performance table based on the insect species information, and the insect species influence coefficient BL is obtained based on the insect species gnawing ability; according to the insect quantity information BV and the insect species influence coefficient BL, based on the biological damage correlation function Calculate and obtain the biological damage coefficient BM of each area of ​​the optical cable to be tested, wherein b3 and b4 are proportional factors and are both greater than 0; comprehensively calculate the physical damage coefficient BW, chemical damage coefficient BH and biological damage coefficient BM of each area of ​​the optical cable to be tested to obtain the external damage coefficient BQ of each area of ​​the optical cable to be tested; determine the increase degree of detection frequency of each area of ​​the optical cable to be tested based on the external damage coefficient BQ of each area of ​​the optical cable to be tested, wherein the greater the external damage coefficient BQ of each area of ​​the optical cable to be tested, the higher the increase degree of detection frequency of each area of ​​the optical cable to be tested; obtain the regional detection frequency of each area of ​​the optical cable to be tested based on the minimum detection frequency of the optical cable and the increase degree of detection frequency of each area of ​​the optical cable to be tested; Using an optical power meter to detect whether a fault occurs at the connection position of the optical cable to be tested, and if a fault occurs, outputting the connection fault position information; According to the optical cable area division results and the regional detection frequency, use the optical time domain reflectometer to detect each area to determine whether a fault occurs. If a fault occurs, determine the specific fault point to obtain the optical cable fault location information; The connection fault location information and the optical cable fault location information are sent to the remote user end. When the connection fault location information and the optical cable fault location information are received, the optical cable to be tested is repaired or replaced.

2. A method for locating optical fiber network faults according to claim 1, characterized in that: The steps of detecting whether a fault occurs at a connection position of the optical cable to be tested based on an optical power meter and outputting connection fault position information if a fault occurs specifically include: Obtaining an optical power meter and establishing a signal connection link between the optical power meter and the optical cable to be tested; According to the optical cable connection position information, the optical power meter performs fault detection on the connection position of the optical cable to be tested, determines whether a connection device fails, and outputs connection fault position information if a failure occurs.

3. A method for locating optical fiber network faults according to claim 2, characterized in that: According to the optical cable area division result and the regional detection frequency, an optical time domain reflectometer is used to detect each area to determine whether a fault occurs. If a fault occurs, the specific fault point is determined to obtain the optical cable fault location information, specifically including: Based on the optical time domain reflectometer, each area in the optical cable area division result is detected to determine whether a fault occurs, and the area where the fault occurs is marked as the optical fiber fault area, wherein the detection frequency of each area of ​​the optical cable to be tested by the optical time domain reflectometer is the area detection frequency; Based on the GIS positioning device, the optical fiber of the optical cable to be tested is positioned and an optical fiber model is established, the optical fiber fault area is marked on the optical fiber model, the flow extension state of the fluid in the optical fiber fault area is simulated based on the optical fiber model to obtain a fluid motion curve, and based on the fluid motion curve, it is determined whether there is an optical fiber breakage in the optical fiber fault area. If there is an optical fiber breakage, the optical fiber fault area with the optical fiber breakage is marked as an optical fiber breakage fault area and the optical fiber breakage point position information is output; The thickness of each wrapping layer in the optical fiber fault area is detected by an ultrasonic thickness gauge to obtain wrapping thickness information of each wrapping layer; Obtaining original thickness information of each wrapping layer in the optical fiber fault area, and comparing each wrapping thickness information with the original thickness information of each wrapping layer to obtain a wrapping layer thickness comparison result; Based on the comparison result of the coating thickness, it is judged whether the coating layers in the optical fiber fault area are corroded. If the coating thickness information is less than the original thickness information, corrosion exists. If corrosion exists, the optical fiber fault area with corrosion is marked as an optical fiber corrosion area, the location where the corrosion exists is located, and the location information of the optical cable corrosion point is output; The optical fiber break point location information and the optical cable corrosion point location information are combined to form the optical cable fault location information.

4. A method for locating optical fiber network faults according to claim 3, characterized in that: The step of sending the connection fault location information and the optical cable fault location information to the remote user end, and repairing or replacing the optical cable to be tested when the connection fault location information and the optical cable fault location information are received specifically includes: Acquire a wireless communication module and establish a signal connection link between the wireless communication module and the optical cable to be tested; Sending the connection fault location information, the optical fiber break point location information and the optical cable corrosion point location information to a remote user terminal based on a wireless communication module; When the connection fault location information is received, the optical fiber connector is replaced based on the connection fault location information; When the optical fiber break point location information is received, the optical fiber inside the optical fiber break fault area is replaced; When the location information of the optical cable corrosion point is received, the outer wall repair material is modulated and the location of the optical cable corrosion point is repaired using the outer wall repair material.

5. A fiber optic network fault location system, characterized in that: The optical fiber network fault locating system is used to implement the optical fiber network fault locating method described in any one of claims 1 to 4, comprising: A region division module is configured to divide the optical cable to be tested into regions based on the shape of the optical cable to be tested to obtain an optical cable region division result; A detection frequency analysis module is configured to determine the detection frequency of the optical cable to be tested based on the historical usage of the optical cable to be tested to obtain the minimum detection frequency of the optical cable; A regional detection analysis module is configured to obtain the regional detection frequency of each area of ​​the optical cable to be tested based on the surrounding environment of the optical cable to be tested, the minimum detection frequency of the optical cable and the result of the optical cable area division; A connection fault analysis module is configured to detect whether a connection position of the optical cable to be tested has a fault based on an optical power meter, and output connection fault position information if a fault occurs; The regional fault analysis module is configured to use an optical time domain reflectometer to detect each area according to the optical cable area division result and the regional detection frequency to determine whether a fault occurs. If a fault occurs, the specific fault point is determined to obtain the optical cable fault location information; The repair and replacement module is configured to send the connection fault location and the optical cable fault point location to the remote user end, and when received, the optical cable to be tested is repaired or replaced based on the connection fault location information and the optical cable fault location information.

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