CN114095077B - Optical cable fault positioning method, device, equipment and storage medium - Google Patents
Optical cable fault positioning method, device, equipment and storage medium Download PDFInfo
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- CN114095077B CN114095077B CN202210067510.5A CN202210067510A CN114095077B CN 114095077 B CN114095077 B CN 114095077B CN 202210067510 A CN202210067510 A CN 202210067510A CN 114095077 B CN114095077 B CN 114095077B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0677—Localisation of faults
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Abstract
The invention relates to the technical field of optical fiber communication, and discloses an optical cable fault positioning method, device, equipment and storage medium. The method comprises the steps of calculating the reverse coefficient and the wave peak value of a fault point through a test optical signal reflected by an optical cable to be analyzed, determining the fault type, calculating the optical path distance of the fault point by utilizing an OTDR positioning technology, finding out a plurality of routing points meeting conditions from an optical cable path extracted based on optical cable information according to the optical path distance, selecting two closest routing points to the optical path distance as fault positioning points, and displaying the fault positioning points and the fault type by combining a map, so that the combination of the OTDR technology, the optical cable routing and the map is realized, the position of the fault point of the optical cable is directly displayed on the map, and the problems that the fault point is fussy to position and the fault point is not directly checked can be solved.
Description
Technical Field
The invention relates to the technical field of optical fiber communication, in particular to an optical cable fault positioning method, device, equipment and storage medium.
Background
In the prior art, for fault detection of an optical cable, Optical Time Domain Reflectometry (OTDR) technology is generally used for positioning a fault of an optical fiber. The red light fault detection technology utilizes visibility of red light, and realizes accurate positioning of fault points through transmission of the red light in optical fiber faults, the OTDR technology measures optical fiber backward Rayleigh scattering or Fresnel reflection signals, and utilizes time and attenuation characteristics of light propagating in the optical fiber to detect faults, but the method can only detect the distance of the faults, can not position the faults to specific positions, and can not determine the fault direction, and accordingly, maintenance personnel need to combine with the routing trend of the optical cable to manually guess and position the specific fault points, and the fault point positioning process is complex and time-consuming in such a mode, and the problems that the fault points are not visual and the like are solved.
Disclosure of Invention
The invention mainly aims to solve the problem that the fault location of the optical cable is not accurate in the prior art.
The invention provides an optical cable fault positioning method in a first aspect, which comprises the following steps:
acquiring a test optical signal reflected by an optical cable to be analyzed within a preset time period, and determining optical cable information of the optical cable to be analyzed based on an acquisition port of the test optical signal;
converting the test light signal into a Fresnel reflection peak curve, and calculating a reverse coefficient and a wave peak value of a fault point based on the Fresnel reflection peak curve;
inquiring a preset fault limit based on the reverse coefficient and the wave peak value, and determining the fault type of a fault point;
calculating the optical path distance of the fault point relative to the light source point by using an OTDR positioning technology;
determining the specific position of a fault point according to the optical path distance, extracting a plurality of routing points of the optical cable to be analyzed from a cloud based on the specific position and the optical cable information, and sequentially connecting the routing points according to the sequence of the distance from near to far to obtain an optical cable path;
and calculating the distance between the fault point and each routing point, selecting two routing points with the distance meeting the preset condition from the optical cable path as fault locating points, and displaying the fault locating points and the fault types by combining a map.
Optionally, in a first implementation manner of the first aspect of the present invention, the acquiring a test optical signal reflected by an optical cable to be analyzed within a preset time period, and determining optical cable information of the optical cable to be analyzed based on an acquisition port of the test optical signal includes:
receiving reflected light signals generated by fault points in the optical cable to be analyzed based on a Fresnel reflection principle at multiple moments by using an optical cable test interface on an optical fiber tester, and generating test light signals based on the reflected light signals;
and acquiring the port number of the optical cable test interface, and inquiring corresponding optical cable information from the cloud based on the corresponding relation between the port number and the optical cable.
Optionally, in a second implementation manner of the first aspect of the present invention, the calculating, by using an OTDR positioning technique, an optical path distance between the fault point and the light source point includes:
reading an emission log of a light source signal of the optical cable test interface;
analyzing the frequency point and the receiving time point of the test optical signal;
extracting an emission time point of the test light signal from the emission log based on the frequency point;
and calculating the optical path distance of a fault point corresponding to the test optical signal by using a preset OTDR positioning formula according to the transmitting time point and the receiving time point, wherein the optical path distance is the distance from the optical fiber tester to the fault point.
Optionally, in a third implementation manner of the first aspect of the present invention, the OTDR positioning formula is:
x=(vo*(t1-t0))/(2*n)，
wherein x is the optical path distance, vo is the transmission speed of the optical signal in the optical cable to be analyzed again, t0 is the reflection time point, t1 is the receiving time point, and n is the refractive index parameter of the optical cable to be analyzed.
Optionally, in a fourth implementation manner of the first aspect of the present invention, the determining a specific position of a fault point according to the optical path distance, extracting multiple routing points of the optical cable to be analyzed from a cloud based on the specific position and the optical cable information, and sequentially connecting the multiple routing points according to a sequence from near to far to obtain an optical cable path includes:
inquiring a routing point set belonging to the optical cable to be analyzed from a cloud according to the optical cable information;
determining a specific position of a fault point based on the optical path distance;
selecting a plurality of routing points with the distance from the fault point equal to R from the routing point set by taking the specific position as a center, and calculating the distance of each routing point in the plurality of routing points;
and sequentially connecting the plurality of routing points into a line according to the sequence of the distance from near to far, and performing optical cable rendering by combining a map to obtain an optical cable path.
Optionally, in a fifth implementation manner of the first aspect of the present invention, the calculating distances between the fault point and each routing point, selecting two routing points from the optical cable path, where a distance between the two routing points meets a preset condition, as fault location points, and displaying the fault location points and the fault type in combination with a map includes:
comparing the light path distance with the distance of each routing point in the plurality of routing points respectively to obtain a comparison result;
based on the comparison result, selecting two routing points with the shortest distance to the fault point from the plurality of routing points as fault positioning points;
and marking and displaying a fault section at a corresponding position in the optical cable path based on the fault positioning point and the fault type.
Optionally, in a sixth implementation manner of the first aspect of the present invention, the displaying, based on the fault location point and the fault type, a mark of the fault section at a corresponding position in the optical cable path includes:
based on the fault positioning point, performing marking rendering on a fault section in the optical cable path to obtain a fault point mark;
calculating the distance between the fault point and two end points in the fault section, and marking the position of the fault point according to the distance;
and adding the label of the fault point position and the fault type into the fault section for displaying.
A second aspect of the present invention provides an optical cable fault location apparatus, including:
the system comprises an acquisition module, a detection module and a processing module, wherein the acquisition module is used for acquiring a test optical signal reflected by an optical cable to be analyzed within a preset time period and determining optical cable information of the optical cable to be analyzed based on an acquisition port of the test optical signal;
the determining module is used for converting the test optical signal into a Fresnel reflection peak curve and calculating a reverse coefficient and a wave peak value of a fault point based on the Fresnel reflection peak curve; inquiring a preset fault limit based on the reverse coefficient and the wave peak value, and determining the fault type of a fault point;
the positioning module is used for calculating the optical path distance of the fault point relative to the light source point by using an OTDR positioning technology;
the extraction module is used for determining the specific position of a fault point according to the optical path distance, extracting a plurality of routing points of the optical cable to be analyzed from a cloud based on the specific position and the optical cable information, and sequentially connecting the routing points according to the sequence of the distance from near to far to obtain an optical cable path;
and the display module is used for calculating the distance between the fault point and each routing point, selecting two routing points with the distance meeting the preset condition from the optical cable path as fault positioning points, and displaying the fault positioning points and the fault types by combining a map.
Optionally, in a first implementation manner of the second aspect of the present invention, the obtaining module includes:
the signal acquisition unit is used for receiving reflected light signals generated by fault points in the optical cable to be analyzed at multiple moments based on a Fresnel reflection principle by using an optical cable test interface on the optical fiber tester and generating test light signals based on the reflected light signals;
and the first query unit is used for acquiring the port number of the optical cable test interface and querying corresponding optical cable information from the cloud based on the corresponding relation between the port number and the optical cable.
Optionally, in a second implementation manner of the second aspect of the present invention, the positioning module includes:
the reading unit is used for reading the emission log of the light source signal of the optical cable test interface;
the analysis unit is used for analyzing the frequency point and the receiving time point of the test optical signal;
an extraction unit configured to extract an emission time point of the test light signal from the emission log based on the frequency point;
and the positioning calculation unit is used for calculating the optical path distance of a fault point corresponding to the test optical signal by using a preset OTDR positioning formula according to the transmitting time point and the receiving time point, wherein the optical path distance is the distance from the optical fiber tester to the fault point.
Optionally, in a third implementation manner of the second aspect of the present invention, the OTDR positioning formula is:
x=(vo*(t1-t0))/(2*n)，
wherein x is the optical path distance, vo is the transmission speed of the optical signal in the optical cable to be analyzed again, t0 is the reflection time point, t1 is the receiving time point, and n is the refractive index parameter of the optical cable to be analyzed.
Optionally, in a fourth implementation manner of the second aspect of the present invention, the extraction module includes:
the second query unit is used for querying a routing point set belonging to the optical cable to be analyzed from a cloud end according to the optical cable information;
the determining unit is used for determining the specific position of the fault point based on the optical path distance;
a selecting unit, configured to select, from the set of routing points, a plurality of routing points whose distances from the failure point are equal to R, with the specific location as a center, and calculate a distance of each of the plurality of routing points;
and the rendering unit is used for sequentially connecting the plurality of routing points into a line according to the sequence of the distances from near to far, and performing optical cable rendering by combining a map to obtain an optical cable path.
Optionally, in a fifth implementation manner of the second aspect of the present invention, the display module includes:
the comparison unit is used for comparing the light path distance with the distance of each routing point in the plurality of routing points respectively to obtain a comparison result;
a selecting unit, configured to select, from the plurality of routing points, two routing points that are the shortest distance from the failure point as failure location points based on the comparison result;
and the display unit is used for marking and displaying the fault section at the corresponding position in the optical cable path based on the fault positioning point and the fault type.
Optionally, in a sixth implementation manner of the second aspect of the present invention, the display unit is specifically configured to:
based on the fault positioning point, performing marking rendering on a fault section in the optical cable path to obtain a fault point mark;
calculating the distance between the fault point and two end points in the fault section, and marking the position of the fault point according to the distance;
and adding the label of the fault point position and the fault type into the fault section for displaying.
A third aspect of the present invention provides an optical cable fault location apparatus, comprising: a memory and at least one processor, the memory having instructions stored therein; the at least one processor invokes the instructions in the memory to cause the fiber optic cable fault location apparatus to perform the various steps of the fiber optic cable fault location method as described above.
A fourth aspect of the present invention provides a computer-readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the steps of the optical cable fault location method as described above.
Has the advantages that:
in the technical scheme provided by the invention, the inverse coefficient and the peak value of a fault point are calculated through a test optical signal reflected by an optical cable to be analyzed, the fault type is determined, the optical path distance of the fault point is calculated by using an OTDR positioning technology, a plurality of routing points meeting the conditions are found out from an optical cable path extracted based on optical cable information according to the optical path distance, two closest routing points to the optical path distance are selected as fault positioning points, and the fault positioning points and the fault type are displayed by combining a map, so that the fault point combination map is realized, namely, the fault point position of the optical cable is directly displayed on the map by combining the OTDR technology with the optical cable route and the map, and the problems of tedious fault point positioning and non-intuitive fault point checking can be solved.
Drawings
Fig. 1 is a schematic diagram of a first embodiment of a fault location method for an optical cable according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a second embodiment of a method for locating a fault in an optical fiber cable according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an embodiment of a cable fault locating device provided by an embodiment of the present invention;
fig. 4 is a schematic view of another embodiment of the optical cable fault locating device provided by the embodiment of the invention;
fig. 5 is a schematic diagram of an embodiment of an optical cable fault location device according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides an optical cable fault positioning method, an optical cable fault positioning device and a storage medium, wherein the method is mainly based on an OTDR technology, combines optical cable routing and map modes, and quickly and visually displays the position of an optical cable fault point on a map: and detecting the optical cable with the problem by using an OTDR technology, uploading a detection result to a cloud end, and automatically analyzing the OTDR detection result by the cloud end to obtain the optical path distance of the optical cable fault point. And comparing the optical cable routes one by one so as to locate the optical cable route point closest to the fault point. And marking the position information of the fault point on the map by the geographical position information of the optical cable routing point so as to solve the problems of complicated fault point positioning and non-visual fault point checking.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be implemented in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," or "having," and any variations thereof, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
For convenience of understanding, a specific flow of the embodiment of the present invention is described below, and referring to fig. 1, a first embodiment of a method for locating a fault in an optical cable according to the embodiment of the present invention includes:
101. acquiring a test optical signal reflected by the optical cable to be analyzed within a preset time period, and determining optical cable information of the optical cable to be analyzed based on an acquisition port of the test optical signal;
it is understood that the executing main body of the present invention may be an optical cable fault location device, and in practical applications, the optical cable fault location device is implemented by using an optical fiber tester and a server, which is not limited herein.
In this embodiment, the test optical signal is implemented by an optical fiber tester, which is specifically a test device based on an OTDR system, and the optical fiber tester first accesses an optical fiber cable to be analyzed into an interface of the optical fiber tester, generates an optical pulse signal by the optical fiber tester, and outputs the optical pulse signal from the interface to the optical fiber cable to be analyzed, where the optical fiber cable transmits the optical pulse signal, and after the optical pulse signal is transmitted to a fault point, a backward astigmatic signal is generated due to a fault of the optical fiber cable, and the backward astigmatic signal is transmitted back to the optical fiber tester to obtain the test optical signal.
Further, the interface number of the received test optical signal is obtained by detecting the interface in the optical fiber tester, and the optical cable information of the optical cable to be analyzed at present is inquired according to the preset corresponding relation between the interface number and the optical cable. The specific corresponding relation can be that the optical cable information is synchronized to the server, and after the optical fiber tester receives the optical signal, the optical cable tester communicates with the server through the communication module to inquire out the corresponding optical cable information.
In practical application, the path information of the optical cable is called from the server based on the optical cable information, specifically, the routing point of the optical cable is called, and the routing point is displayed by combining with the map information to determine the trend of the optical cable.
In this embodiment, the route information is the position and the identifier of the route point set and uploaded by the user when the optical cable is laid in advance, and the server renders a route of the optical cable based on the uploaded information and a map.
102. Converting the test light signal into a Fresnel reflection peak curve, and calculating a reverse coefficient and a wave peak value of a fault point based on the Fresnel reflection peak curve;
in the step, a signal reflected by the optical cable to be analyzed is collected in real time through a tester, the collected signal is converted into a curve based on a signal visualization conversion algorithm, a reverse coefficient of the fault point is calculated based on a wave crest and a wave trough in the curve and a wavelet peak between the wave crest and the wave trough, the direction coefficient refers to a reflection degree coefficient of the fault point to the signal, and the corresponding fault type can be determined through the reflection degree coefficient. And for the calculation of the peak, the maximum value position in the Fresnel reflection peak curve is identified.
103. Inquiring a preset fault limit based on the inverse coefficient and the wave peak value, and determining the fault type of a fault point;
in this embodiment, the reflection degrees of the optical signals corresponding to the preset various types of faults are compared based on the inverse coefficient, and the comparison specifically includes a partial blocking fault, a full blocking fault, and an optical fiber loss fault.
In the comparison process, if the comparison reflection degree is greater than the partial obstruction fault, the fiber loss fault is determined, and further, the determination is performed based on the comparison of the wave peak values. And if the comparison reflection degree is smaller than the partial obstruction fault and larger than the full obstruction fault, determining the partial obstruction fault. And if the comparison reflection degree is smaller than the full obstruction fault, determining the fault as the full obstruction fault.
104. Calculating the optical path distance of the fault point relative to the light source point by using an OTDR positioning technology;
in this step, the OTDR positioning technique refers to an algorithm for realizing positioning based on the time difference between transmission and reception of an optical signal, and the positioning analysis actually calculates the distance from a node of a reflected optical signal in an optical cable to an optical fiber tester, by which the geographical location of a fault point can be located.
Specifically, the emission log of the light source signal of the optical cable test interface is read;
analyzing the frequency point and the receiving time point of the test optical signal;
extracting an emission time point of the test light signal from the emission log based on the frequency point;
and calculating the optical path distance of a fault point corresponding to the test optical signal by using a preset OTDR positioning formula according to the transmitting time point and the receiving time point, wherein the optical path distance is the distance from the optical fiber tester to the fault point.
That is, the emission time and the receiving time of the corresponding pulse are determined by collecting a working log on the fiber optic tester, and the optical path distance is calculated based on the following formula:
x=(vo*(t1-t0))/(2*n)，
wherein x is the optical path distance, vo is the transmission speed of the optical signal in the optical cable to be analyzed again, t0 is the reflection time point, t1 is the receiving time point, and n is the refractive index parameter of the optical cable to be analyzed.
105. Determining a specific position of a fault point according to the optical path distance, extracting a plurality of routing points of the optical cable to be analyzed from the cloud based on the specific position and the optical cable information, and sequentially connecting the routing points according to the sequence from near to far to obtain an optical cable path;
in this embodiment, based on the optical cable information, a corresponding optical cable path is matched from an optical cable map in the cloud, and highlighted in the map, then routing points meeting the conditions are found from the highlighted path based on the optical path distance, then path segments of the routing points are selected to keep highlighted, and gray scale display is performed on other parts, so that an optical cable path is obtained.
In practical application, a search position may also be determined by the optical path distance, then a routing point within a certain radius is searched based on the position, then the searched routing point is screened based on the optical cable information, and the routing point on the optical cable information is selected for connection to obtain the optical cable path.
106. And calculating the distance between the fault point and each routing point, selecting two routing points with the distance meeting the preset conditions from the optical cable path as fault locating points, and displaying the fault locating points and the fault types by combining a map.
In the step, position information of a fault point is determined based on the optical path distance, the distance between the fault point and each screened routing point is calculated based on the position information, routing points meeting the conditions are selected as fault locating points based on the distance, and at least one routing point is preferably selected as a fault locating point.
And then, marking on a map based on the fault positioning point, and displaying on the map.
According to the embodiment, the reverse coefficient and the peak value of a fault point are calculated through a test optical signal reflected by an optical cable to be analyzed, the fault type is determined, the optical path distance of the fault point is calculated through an OTDR positioning technology, a plurality of routing points meeting conditions are found out from a cloud based on the optical path distance, two closest routing points are selected as the fault locating points according to the optical path distance, then marking and fault type display of the fault point are carried out, based on the OTDR technology, the optical cable routing and map modes are combined, the position of the fault point of the optical cable is rapidly and visually displayed on a map, the time for locating the fault point can be greatly reduced, and emergency repair personnel can conveniently and rapidly arrive at a fault site for emergency repair.
Referring to fig. 2, a second embodiment of a method for locating a fault in an optical cable according to an embodiment of the present invention includes:
201. acquiring a test optical signal reflected by the optical cable to be analyzed, and determining optical cable information of the optical cable to be analyzed based on an acquisition port of the test optical signal;
the method comprises the steps that optical signals and optical cable information of an optical cable to be analyzed are obtained through an optical fiber tester, specifically, reflected light signals generated by fault points in the optical cable to be analyzed at multiple moments based on a Fresnel reflection principle are received through an optical cable testing interface on the optical fiber tester, and testing optical signals are generated based on the reflected light signals;
and acquiring the port number of the optical cable test interface, and inquiring corresponding optical cable information from the cloud based on the corresponding relation between the port number and the optical cable.
In practical applications, the test optical signal may be a set of optical signals in a time period, and after the optical fiber tester collects the test optical signal, the method further includes generating a signal curve based on the test optical signal, where the signal curve is a graph of time and a transmission distance.
202. Converting the test optical signal into a Fresnel reflection peak curve, and calculating a reverse coefficient and a wave peak value of a fault point based on the Fresnel reflection peak curve;
203. inquiring a preset fault limit based on the inverse coefficient and the wave peak value, and determining the fault type of a fault point;
204. calculating the optical path distance of the fault point relative to the light source point by using an OTDR positioning technology;
in the step, the signal curve is analyzed by the OTDR technology, and the distance from the node generating the test optical signal to the optical fiber tester is calculated to obtain the optical path distance. The measuring principle of the OTDR is that a system main control unit controls a laser source unit to generate pulse laser signals, the pulse laser signals are transmitted into a measured optical fiber after passing through an optical transceiving isolation unit and an optical fiber connector, at the moment, Fresnel emission is generated at the optical fiber connector (air media are arranged at the connection position of two optical fibers), light waves return to the optical fiber again to continue to propagate forwards, Rayleigh scattering is continuously generated in the forward transmission process, and a Fresnel reflection is generated at the tail end of the optical fiber. The Fresnel reflection and Rayleigh reflection light signals transmitted backwards enter a receiving system after passing through a receiving/transmitting isolation unit, then enter a signal processing unit after passing through photoelectric conversion, and finally the distributed loss waveform of the whole optical fiber is displayed on a display terminal.
In practical application, the OTDR principle is mainly used for positioning a fault point or an event point, and the basic principle of positioning is as follows:
(1) the propagation speed of light in the air is vs =3 × 108m/s；
(2) The propagation speed of light in the optical fiber is vo = vs/n, wherein n is a known refractive index parameter of the optical fiber, and the refractive index n of the optical fiber is generally approximately equal to 1.46;
assuming that a break point occurs at x km of the optical fiber, the system transmits a pulse laser signal at the time t0, and receives a strong reflection signal of the break point of the optical fiber at the time t1, then the distance x = (vs × t1-t0))/(2 × n) of the break point from the local system can be obtained through calculation.
Namely, a pulse light signal with a fixed period (such as a pulse period of 1ms and a pulse duration of 10 nS-20 uS) is emitted by the optical fiber tester, injected into the tested optical fiber, and information (such as amplitude, phase and frequency) of the pulse light signal reflected each time is received and collected to analyze the physical quantity to be measured.
205. Inquiring a routing point set belonging to the optical cable to be analyzed from the cloud according to the optical cable information;
in practical application, in the laying process of the optical cable, workers configure routing points arranged at different positions based on the use of the optical cable, after the laying is completed, a table of the optical cable routing points is constructed based on the position information of the arranged routing points and is uploaded to a server (namely a cloud), the server draws the line and the trend of the optical cable on a map based on the uploaded table, marks of the routing points are added to corresponding positions, and after the adding is completed, the constructed line is rendered by using an image rendering technology to obtain a complete path of the optical cable.
In the process of fault location, matching a complete path of a corresponding optical cable from a server through optical cable information, and then screening out routing points meeting certain conditions on the basis of the complete path to form a routing point set, wherein the certain conditions mean that the difference between the optical path distance of each routing point and the optical path distance of a fault point is not more than the maximum communication coverage range of the routing point.
206. Determining the specific position of a fault point based on the light path distance;
207. selecting a plurality of routing points with the distance from the fault point equal to R from the routing point set by taking the specific position as a center, and calculating the distance of each routing point in the plurality of routing points;
in this embodiment, based on the fault point as the center, the routing points with the distances smaller than the preset value are selected from the routing point set in a circular search mode, and the distances from the routing points to the optical fiber tester are calculated.
208. Sequentially connecting a plurality of routing points into a line according to the sequence of the distances from near to far, and performing optical cable rendering by combining a map to obtain an optical cable path;
in this embodiment, the screened routing points smaller than the preset value are connected in series according to the distance from large to small to obtain a path segment, and image rendering is performed based on the path segment to obtain a corresponding fault optical cable path.
In practical application, during rendering, the map is rendered in combination with a map, where the map may be a cable route map, a geographic map, a city map, or the like.
209. And calculating the distance between the fault point and each routing point, selecting two routing points with the distance meeting the preset conditions from the optical cable path as fault locating points, and displaying the fault locating points and the fault types by combining a map.
In this embodiment, the optical path distance is respectively compared with the distance of each routing point in the plurality of routing points to obtain a comparison result;
based on the comparison result, selecting two routing points with the shortest distance to the fault point from the plurality of routing points as fault positioning points;
and marking and displaying a fault section at a corresponding position in the optical cable path based on the fault positioning point and the fault type.
Further, the displaying, based on the fault location point and the fault type, a mark of the fault section at a corresponding position in the optical cable path includes:
based on the fault positioning point, performing marking rendering on a fault section in the optical cable path to obtain a fault point mark;
calculating the distance between the fault point and two end points in the fault section, and marking the position of the fault point according to the distance;
and adding the label of the fault point position and the fault type into the fault section for displaying.
When the optical cable breaks down, the equipment obtains optical cable information by using an OTDR technology and uploads the optical cable information to the cloud, and then the cloud analyzes the optical path distance of the optical cable fault point. The method comprises the steps of rendering the trend of the whole optical cable on a map in a map by connecting the positions of routing points passed by the optical cable and adjacent points into a line on the map in a map route map mode, recording the length of the optical cable represented by each optical cable routing point on the map, automatically comparing the optical path distance of the optical cable fault point with the optical path distance of each routing point of the optical cable by a program, recording the routing point closest to the fault point, finally obtaining which two facility points the fault point is located between, and marking the position of the breakpoint closer to which facility point, thereby showing the position of the fault point on the map.
In conclusion, by using the OTDR technique and combining the optical cable routing and the map, the location of the optical cable fault point is quickly and intuitively displayed on the map: and detecting the optical cable with the problem by using an OTDR technology, uploading a detection result to the cloud, and automatically analyzing the OTDR detection result by the cloud to obtain the optical path distance of the optical cable fault point. And comparing the optical cable routes one by one so as to locate the optical cable route point closest to the fault point. And marking the position information of the fault point on the map through the geographical position information of the optical cable routing point.
Meanwhile, the problem optical cable is detected, the detection result is analyzed, and the position of the optical cable fault point is rapidly and visually displayed by combining the optical cable route and the map. By the mode, the time for positioning the fault point can be greatly reduced, and rush repair personnel can conveniently and quickly arrive at the fault site for rush repair.
With reference to fig. 3, the optical cable fault location method in the embodiment of the present invention is described above, and the optical cable fault location device in the embodiment of the present invention is described below, where the first embodiment of the optical cable fault location device in the embodiment of the present invention includes:
an obtaining module 301, configured to obtain a test optical signal reflected by an optical cable to be analyzed within a preset time period, and determine optical cable information of the optical cable to be analyzed based on an obtaining port of the test optical signal;
a determining module 302, configured to convert the test optical signal into a fresnel reflection peak curve, and calculate a reverse coefficient and a peak value of a fault point based on the fresnel reflection peak curve; inquiring a preset fault limit based on the reverse coefficient and the wave peak value, and determining the fault type of a fault point;
the positioning module 303 is configured to calculate an optical path distance between the fault point and the light source point by using an OTDR positioning technique;
an extracting module 304, configured to determine a specific position of a fault point according to the optical path distance, extract, based on the specific position and the optical cable information, a plurality of routing points of the optical cable to be analyzed from a cloud, and sequentially connect the routing points according to a sequence from near to far to obtain an optical cable path;
a display module 305, configured to calculate distances between the fault point and each routing point, select two routing points whose distances meet a preset condition from the optical cable path as fault location points, and display the fault location points and the fault types in combination with a map.
In the embodiment of the invention, the inverse coefficient and the wave peak value of a fault point are calculated by a test optical signal reflected by an optical cable to be analyzed, the fault type is determined, the optical path distance of the fault point is calculated by using an OTDR positioning technology, a plurality of routing points meeting the conditions are found out from an optical cable path extracted based on optical cable information according to the optical path distance, two closest routing points to the optical path distance are selected as the fault locating points, and the fault locating points and the fault type are displayed by combining a map, so that the combination of the OTDR technology, the optical cable routing and the map is realized, the position of the fault point of the optical cable is directly displayed on the map, and the problems of complicated fault point positioning and non-intuitive fault point checking can be solved.
Referring to fig. 4, a second embodiment of the optical cable fault locating apparatus according to the embodiment of the present invention includes:
an obtaining module 301, configured to obtain a test optical signal reflected by an optical cable to be analyzed within a preset time period, and determine optical cable information of the optical cable to be analyzed based on an obtaining port of the test optical signal;
a determining module 302, configured to convert the test optical signal into a fresnel reflection peak curve, and calculate a reverse coefficient and a peak value of a fault point based on the fresnel reflection peak curve; inquiring a preset fault limit based on the reverse coefficient and the wave peak value, and determining the fault type of a fault point;
the positioning module 303 is configured to calculate an optical path distance between the fault point and the light source point by using an OTDR positioning technique;
an extracting module 304, configured to determine a specific position of a fault point according to the optical path distance, extract, based on the specific position and the optical cable information, a plurality of routing points of the optical cable to be analyzed from a cloud, and sequentially connect the routing points according to a sequence from near to far to obtain an optical cable path;
a display module 305, configured to calculate distances between the fault point and each routing point, select two routing points whose distances meet a preset condition from the optical cable path as fault location points, and display the fault location points and the fault types in combination with a map.
Optionally, the obtaining module 301 includes:
the signal acquisition unit 3011 is configured to receive, by using an optical cable test interface on the optical fiber tester, reflected light signals generated by fault points in an optical cable to be analyzed at multiple moments based on a fresnel reflection principle, and generate test light signals based on the multiple reflected light signals;
the first query unit 3012 is configured to obtain a port number of the optical cable test interface, and query corresponding optical cable information from a cloud based on a correspondence between the port number and an optical cable.
Optionally, the positioning module 303 includes:
a reading unit 3031, configured to read a transmission log of a light source signal of the optical cable test interface;
an analyzing unit 3032, configured to analyze a frequency point and a receiving time point of the test optical signal;
an extraction unit 3033, configured to extract the emission time point of the test light signal from the emission log based on the frequency point;
and a positioning calculation unit 3034, configured to calculate, according to the transmission time point and the reception time point, an optical path distance of a fault point corresponding to the test optical signal by using a preset OTDR positioning formula, where the optical path distance is a distance from the optical fiber tester to the fault point.
Optionally, the OTDR positioning formula is:
x=(vo*(t1-t0))/(2*n)，
wherein x is the optical path distance, vo is the transmission speed of the optical signal in the optical cable to be analyzed again, t0 is the reflection time point, t1 is the receiving time point, and n is the refractive index parameter of the optical cable to be analyzed.
Optionally, the extracting module 304 includes:
a second query unit 3041, configured to query, according to the optical cable information, a set of routing points belonging to the optical cable to be analyzed from a cloud;
a determining unit 3042 for determining a specific position of the fault point based on the optical path distance;
a selecting unit 3043, configured to select, from the set of routing points, a plurality of routing points whose distances from the failure point are equal to R with the specific position as a center, and calculate a distance of each routing point in the plurality of routing points;
the rendering unit 3044 is configured to sequentially connect the multiple routing points into a line according to a sequence from near to far, and perform cable rendering by combining with a map to obtain a cable path.
Optionally, the display module 305 includes:
a comparison unit 3051, configured to compare the optical path distance with a distance of each of the plurality of routing points, respectively, to obtain a comparison result;
a selecting unit 3052, configured to select, based on the comparison result, two routing points with a shortest distance from the fault point from the multiple routing points as fault location points;
and the display unit 3053 is configured to perform marking display of a fault segment at a corresponding position in the optical cable path based on the fault location point and the fault type.
Optionally, the display unit 3053 is specifically configured to:
based on the fault positioning point, performing marking rendering on a fault section in the optical cable path to obtain a fault point mark;
calculating the distance between the fault point and two end points in the fault section, and marking the position of the fault point according to the distance;
and adding the label of the fault point position and the fault type into the fault section for displaying.
Fig. 3 and 4 describe the optical cable fault location device in the embodiment of the present invention in detail from the perspective of the modular functional entity, and the optical cable fault location device in the embodiment of the present invention is described in detail from the perspective of hardware processing.
Fig. 5 is a schematic structural diagram of an optical cable fault location apparatus according to an embodiment of the present invention, where the optical cable fault location apparatus 500 may have a relatively large difference due to different configurations or performances, and may include one or more processors (CPUs) 510 (e.g., one or more processors) and a memory 520, and one or more storage media 530 (e.g., one or more mass storage devices) storing applications 533 or data 532. Memory 520 and storage media 530 may be, among other things, transient or persistent storage. The program stored on the storage medium 530 may include one or more modules (not shown), each of which may include a series of instructions operating on the cable fault locating device 500. Still further, the processor 510 may be configured to communicate with the storage medium 530 to execute a series of instruction operations in the storage medium 530 on the cable fault locating apparatus 500.
The cable fault location apparatus 500 may also include one or more power supplies 540, one or more wired or wireless network interfaces 550, one or more input-output interfaces 560, and/or one or more operating systems 531, such as Windows Server, Mac OS X, Unix, Linux, FreeBSD, and the like. Those skilled in the art will appreciate that the configuration of the cable fault locating device shown in fig. 5 does not constitute a limitation of the cable fault locating device and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.
The present invention also provides an optical cable fault location device, which may be any device capable of executing the optical cable fault location method described in the above embodiments, and includes a memory and a processor, where the memory stores computer readable instructions, and when the computer readable instructions are executed by the processor, the processor executes the steps of the optical cable fault location method in the above embodiments.
The present invention also provides a computer readable storage medium, which may be a non-volatile computer readable storage medium, and which may also be a volatile computer readable storage medium, having stored therein instructions, which, when run on a computer, cause the computer to perform the steps of the optical cable fault location method.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is substantially or partly contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. An optical cable fault location method, characterized in that the optical cable fault location method comprises:
acquiring a test optical signal reflected by an optical cable to be analyzed within a preset time period, and determining optical cable information of the optical cable to be analyzed based on an acquisition port of the test optical signal;
converting the test light signal into a Fresnel reflection peak curve based on a signal visualization conversion algorithm, and calculating a reflection degree coefficient of a fault point based on a peak, a trough and a wavelet peak between the peak and the trough in the Fresnel reflection peak curve;
inquiring a preset fault limit based on the reflection degree coefficient, and determining the fault type of a fault point;
calculating the optical path distance of the fault point relative to the light source point by using an OTDR positioning technology;
determining a specific position of a fault point based on the light path distance, and searching a routing point within a certain radius based on the specific position;
screening routing points searched based on a certain radius based on the optical cable information, and selecting the routing points on the optical cable corresponding to the optical cable information to obtain a routing point set belonging to the optical cable to be analyzed;
selecting a plurality of routing points with the distance from the fault point equal to R from the routing point set by taking the specific position as a center, and calculating the distance of each routing point in the plurality of routing points;
sequentially connecting the plurality of routing points into a line according to the sequence of the distances from near to far, and performing optical cable rendering by combining a map to obtain an optical cable path;
and calculating the distance between the fault point and each routing point, selecting two routing points with the distance meeting the preset condition from the optical cable path as fault locating points, and displaying the fault locating points and the fault types by combining a map.
2. The method for locating a fault in an optical cable according to claim 1, wherein the obtaining a test optical signal reflected back by the optical cable to be analyzed within a preset time period, and determining the optical cable information of the optical cable to be analyzed based on an obtaining port of the test optical signal includes:
receiving reflected light signals generated by fault points in the optical cable to be analyzed at multiple moments based on a Fresnel reflection principle by using an optical cable test interface on an optical fiber tester, and generating test light signals based on the reflected light signals;
and acquiring the port number of the optical cable test interface, and inquiring corresponding optical cable information from the cloud based on the corresponding relation between the port number and the optical cable.
3. The method for locating optical cable faults according to claim 2, wherein the calculating the optical path distance of the fault point relative to the light source point by using an OTDR locating technique includes:
reading an emission log of a light source signal of the optical cable test interface;
analyzing the frequency point and the receiving time point of the test optical signal;
extracting an emission time point of the test light signal from the emission log based on the frequency point;
and calculating the optical path distance of a fault point corresponding to the test optical signal by using a preset OTDR positioning formula according to the transmitting time point and the receiving time point, wherein the optical path distance is the distance from the optical fiber tester to the fault point.
4. The optical cable fault location method of claim 3, wherein the OTDR location formula is:
x=(vo*(t1-t0))/(2*n)，
wherein x is the optical path distance, vo is the transmission speed of the optical signal in the optical cable to be analyzed again, t0 is the reflection time point, t1 is the receiving time point, and n is the refractive index parameter of the optical cable to be analyzed.
5. The method for locating the fault in the optical cable according to claim 1, wherein the calculating the distances between the fault point and each routing point, respectively, selecting two routing points from the optical cable path, the distances of which satisfy a preset condition, as the fault location points, and displaying the fault location points and the fault type in combination with a map includes:
comparing the light path distance with the distance of each routing point in the plurality of routing points respectively to obtain comparison results;
based on the comparison result, selecting two routing points with the shortest distance to the fault point from the plurality of routing points as fault positioning points;
and marking and displaying a fault section at a corresponding position in the optical cable path based on the fault positioning point and the fault type.
6. The optical cable fault location method according to claim 5, wherein the displaying of the mark of the fault section at the corresponding position in the optical cable path based on the fault location point and the fault type includes:
based on the fault positioning point, performing marking rendering on a fault section in the optical cable path to obtain a fault point mark;
calculating the distance between the fault point and two end points in the fault section, and marking the position of the fault point according to the distance;
and adding the label of the fault point position and the fault type into the fault section for displaying.
7. An optical cable fault location device, comprising:
the system comprises an acquisition module, a detection module and a processing module, wherein the acquisition module is used for acquiring a test optical signal reflected by an optical cable to be analyzed within a preset time period and determining optical cable information of the optical cable to be analyzed based on an acquisition port of the test optical signal;
the determining module is used for converting the test light signal into a Fresnel reflection peak curve based on a signal visualization conversion algorithm and calculating a reflection degree coefficient of a fault point based on a peak, a trough and a wavelet peak between the peak and the trough in the Fresnel reflection peak curve; inquiring a preset fault limit based on the reflection degree coefficient, and determining the fault type of a fault point;
the positioning module is used for calculating the optical path distance of the fault point relative to the light source point by using an OTDR positioning technology;
the extraction module is used for determining the specific position of the fault point based on the optical path distance and searching a routing point within a certain radius based on the specific position; screening routing points searched based on a certain radius based on the optical cable information, and selecting the routing points on the optical cable corresponding to the optical cable information to obtain a routing point set belonging to the optical cable to be analyzed; selecting a plurality of routing points with the distance from the fault point equal to R from the routing point set by taking the specific position as a center, and calculating the distance of each routing point in the plurality of routing points; sequentially connecting the plurality of routing points into a line according to the sequence of the distances from near to far, and performing optical cable rendering by combining a map to obtain an optical cable path;
and the display module is used for calculating the distance between the fault point and each routing point, selecting two routing points with the distance meeting the preset condition from the optical cable path as fault positioning points, and displaying the fault positioning points and the fault types by combining a map.
8. An optical cable fault location device, comprising:
a memory and at least one processor, the memory having instructions stored therein;
the at least one processor invokes the instructions in the memory to cause the fiber optic cable fault locating device to perform the steps of the fiber optic cable fault locating method of any of claims 1-6.
9. A computer readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the steps of the fiber optic cable fault location method of any of claims 1-6.
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| CN116938327B (en) * | 2023-09-18 | 2024-01-26 | 青岛诺克通信技术有限公司 | FTTH optical fiber link testing method and system |
| CN117478221B (en) * | 2023-12-28 | 2024-03-26 | 南京数脉动力信息技术有限公司 | Method for locating fault point of long-distance transmission optical cable with high spatial resolution |
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