CN111541481A - Distribution network communication optical cable fault distance detection method and system - Google Patents
Distribution network communication optical cable fault distance detection method and system Download PDFInfo
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- CN111541481A CN111541481A CN202010397662.2A CN202010397662A CN111541481A CN 111541481 A CN111541481 A CN 111541481A CN 202010397662 A CN202010397662 A CN 202010397662A CN 111541481 A CN111541481 A CN 111541481A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0791—Fault location on the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
Abstract
The application discloses a distribution network communication optical cable fault distance detection method and a distribution network communication optical cable fault distance detection system, which comprise the following steps: s1: when detecting that the optical cable of the equipment link has a fault, measuring a first distance between a fault point and a measuring point on the optical cable through the OTDR; s2: dividing the length of the fiber core of the optical cable by the sum of 1 and the optical cable stranding rate to obtain a first optical cable skin length; s3: judging whether the optical cable has a disc, if not, executing S4, and if so, executing S5; s4: dividing the first optical cable skin length by the fiber core length and multiplying the length of the optical cable on a map to obtain the actual fault distance of the optical cable when no disc is left; s5: and dividing the difference between the first distance and the optical cable reel remaining length between the OTDR measuring point and the fault point by the difference between the first optical cable sheath length and the optical cable reel remaining length, and multiplying the difference by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the optical cable reel remains. The method and the device solve the technical problem that in the prior art, the fault location is inaccurate due to inaccurate calculation of the fault distance of the optical cable.
Description
Technical Field
The application relates to the technical field of optical cable fault testing, in particular to a distribution network communication optical cable fault distance detection method and system.
Background
With the development of communication technology, the use of optical fiber communication technology is becoming more and more widespread, and in an optical fiber communication system, the optical line obstruction is a main cause of communication interruption.
The traditional fault location mode is as follows: the maintenance personnel use OTDR (optical time domain reflectometer) at one end of the cable to detect the distance of the fiber fault point to determine the approximate location of the fault.
The OTDR detects the length of the fiber core of the optical cable, but the condition of coil remaining exists in the laying of the actual optical cable, so that the accurate distance of the fault point of the optical cable on a map cannot be accurately detected in the prior art, and the fault point cannot be accurately positioned.
Disclosure of Invention
The embodiment of the application provides a distribution network communication optical cable fault distance detection method and system, and solves the technical problem that fault location is inaccurate due to inaccurate calculation of optical cable fault distance in the prior art.
In view of this, a first aspect of the present application provides a method for detecting a distribution network communication optical cable fault distance, where the method includes:
s1: when detecting that an optical cable of an equipment link has a fault, measuring a first distance between a fault point and a measuring point on the optical cable through OTDR;
s2: dividing the length of the fiber core of the optical cable by the sum of 1 and the optical cable stranding rate to obtain a first optical cable skin length;
s3: judging whether the optical cable has a disc, if not, executing S4, and if so, executing S5;
s4: dividing the first distance by the skin length of the first optical cable and multiplying the skin length of the first optical cable by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the optical cable is not coiled;
s5: and obtaining the interval coiling length of the optical cable between the fault point and the measuring point and the total coiling length of the optical cable, taking the difference between the first distance and the interval coiling length as a first difference value, taking the first optical cable skin length and the total coiling length of the optical cable as a second difference value, dividing the first difference value by the second difference value, and multiplying the length of the optical cable on a map to obtain the actual fault distance of the optical cable when coiling is left.
Optionally, dividing the difference between the length of the fiber core and the length of bare fibers in all splice boxes on the optical cable by the sum of the first distance and the optical cable stranding rate to obtain a second optical cable sheath length;
and dividing the difference between the first distance and the bare fiber length in the splice box by the second cable sheath length, and multiplying the difference by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the splice box is overhead and has no tower, wherein the bare fiber length in the splice box is the bare fiber length in the splice box between an OTDR measuring point and a fault point.
Optionally, the first distance and the length of the optical cable reserved on the tower between the OTDR measurement point and the fault point are subtracted, then the difference between the first cable sheath length and the total length of all optical cables on the tower is divided, and finally the difference is multiplied by the length of the optical cable on the map to obtain the actual fault distance of the optical cable when the optical cable is overhead on the tower.
Optionally, sending a request packet from the first end of the device to the second end of the device;
and when the preset times of continuous sending of the data request packets are not responded, sending a test request signal to test the optical cable to obtain an optical cable fault detection result, wherein the test request signal comprises a service object, a test reason and a request serial number.
Optionally, the optical cable fault location on the map is obtained by calculating the fault fiber core, the ODF connected to the fault fiber core, and the actual fault distance through GIS system analysis and/or local analysis.
The second aspect of the present application provides a distribution network communication optical cable fault distance detection system, including:
a fault detection unit: the device comprises an OTDR (optical time domain reflectometer) module, a first distance measuring module and a second distance measuring module, wherein the first distance measuring module is used for measuring a first distance between a fault point and a measuring point on an optical cable through the OTDR when the optical cable of a device link is detected to be in fault;
the first calculation unit: dividing the length of the fiber core of the optical cable by the sum of 1 and the optical cable stranding rate to obtain a first optical cable skin length;
a disk remaining determination unit: the device is used for judging whether the optical cable has a disc, if not, triggering a second calculating unit, and if so, triggering a third calculating unit;
a second calculation unit: the distance measuring device is used for dividing the first distance by the skin length of a first optical cable and multiplying the skin length of the first optical cable by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the optical cable is not coiled;
a third calculation unit: and the method is used for obtaining the interval coiling length of the optical cable between the fault point and the measuring point and the total coiling length of the optical cable, taking the difference between the first distance and the interval coiling length as a first difference value, taking the first optical cable skin length and the total coiling length of the optical cable as a second difference value, dividing the first difference value by the second difference value, and multiplying the second difference value by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when coiling is left.
Optionally, the method further comprises:
a fourth calculation unit: the second optical cable sheath length is obtained by dividing the difference between the fiber core length and the bare fiber length in all the splice boxes on the optical cable by the sum of the first distance and the optical cable stranding rate;
a fifth calculation unit: and the difference between the first distance and the bare fiber length in the splice box is divided by the second cable sheath length, and then the difference is multiplied by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the splice box is overhead and has no tower, wherein the bare fiber length in the splice box is the bare fiber length in the splice box between an OTDR measurement point and a fault point.
Optionally, the method further comprises:
a sixth calculation unit: and the method is used for carrying out subtraction operation on the first distance and the length of the optical cable reserved on the tower between the OTDR measuring point and the fault point, dividing the subtraction operation by the difference between the first optical cable skin length and the total length branches of all the optical cables on the tower, and finally multiplying the difference by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the optical cable is overhead with the tower.
Optionally, the method further comprises:
a data transmission unit: for sending a request packet from the first end of the device to the second end of the device;
a fault determination unit: and when the preset times of continuous sending of the data request packets are not responded, sending a test request signal to test the optical cable to obtain an optical cable fault detection result, wherein the test request signal comprises a service object, a test reason and a request sequence number.
Optionally, the method further comprises:
a fault location unit: and calculating a fault fiber core, an ODF connected with the fault fiber core and the actual fault distance through GIS system analysis and/or local analysis to obtain the specific position of the optical cable fault on a map.
According to the technical scheme, the embodiment of the application has the following advantages:
in the embodiment of the application, a method and a system for detecting the fault distance of a distribution network communication optical cable are provided, and the method comprises the following steps: s1: when detecting that the optical cable of the equipment link has a fault, measuring a first distance between a fault point and a measuring point on the optical cable through the OTDR; s2, dividing the length of the fiber core of the optical cable by the sum of 1 and the optical cable stranding rate to obtain a first optical cable sheath length; s3: judging whether the optical cable has a disc, if not, executing S4, and if so, executing S5; s4: dividing the first optical cable skin length by the fiber core length and multiplying the length of the optical cable on a map to obtain the actual fault distance of the optical cable when no disc is left; s5: obtaining the interval remaining length of the optical cable between the fault point and the measuring point and the total remaining length of the optical cable, taking the difference between the first distance and the interval remaining length of the optical cable as a first difference value, taking the first optical cable skin length and the total remaining length of the optical cable as a second difference value, dividing the first difference value by the second difference value, and multiplying the second difference value by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the optical cable is left.
The calculation method enables the calculation of the fault distance of the optical cable to be more accurate, thereby enabling the positioning of the fault of the optical cable to be more accurate and solving the technical problem that the fault point can not be accurately positioned in the prior art.
Drawings
Fig. 1 is a schematic flowchart of a method for detecting a fault distance of a distribution network communication optical cable according to a first embodiment of the present application;
fig. 2 is a schematic flowchart of a method for detecting a fault distance of a distribution network communication optical cable according to a second embodiment of the present application;
fig. 3 is a schematic structural diagram of a first embodiment of a distribution network communication optical cable fault distance detection system provided by the present application.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The application designs a distribution network communication optical cable fault distance detection method and a distribution network communication optical cable fault distance detection system. The communication link is detected at regular time to find the fault of the optical cable, the distance of the fault of the optical cable is accurately calculated by different calculation methods according to different laying types of the optical cable, and finally, the accurate fault positioning of the optical cable is obtained through a GIS system and/or local analysis.
It should be noted that the meaning of each symbol used in all the embodiments of the present invention and the drawings is specifically:
i: first distance
P: optical cable shrinkage
L1: length of fiber core
La: first cable sheath length
Lb: second cable sheath length
d: actual distance to failure
D: length of optical cable on map
s 1: optical cable reel remaining length between OTDR measuring point and fault point
S: total coil length of optical cable
F: bare fiber length in all splice cases on optical cable
f 1: bare fiber length in splice enclosure between OTDR measurement point to fault point
t 1: optical cable length reserved on tower between OTDR measurement point and fault point
T: total length of all optical cables on tower
For convenience of understanding, referring to fig. 1, a first embodiment of the present application provides a method for detecting a distribution network communication optical cable fault distance, including:
It should be noted that, by testing the device link, information such as an optical cable object, a fiber core state, a test service object, whether an interruption result, an interruption starting end device ID, an interruption distance, a request serial number, and the like of the device link can be tested, and a specific optical cable and a fiber core that have a fault can be known according to the test, where the first distance is a distance length from a fault point to a test point on the optical cable obtained by testing the optical cable through an OTDR (optical time domain reflectometer) at one end of the faulty optical cable.
And 102, dividing the length of the fiber core of the optical cable by the sum of 1 and the optical cable stranding rate to obtain the skin length of the first optical cable.
It should be noted that the core length of the optical cable is the core length between two devices, and after the optical cable is laid, information such as the core length and the optical cable shrinkage rate has been recorded into the system, so the core length and the optical cable shrinkage rate are known, and the sheath length of the optical cable calculated in step 102 is the length of the optical cable between two devices, and for convenience of understanding, can be represented by formula (1).
(1)La＝L1/(1+P)
And 103, judging whether the optical cable has a disc, if not, executing the step 104, and if so, executing the step 105.
It should be noted that, a length of the optical cable is reserved in the laying process as a subsequent work requirement, so that information about whether the optical cable has a coil stay after the optical cable is laid in an optical cable project can be input into the system, so that whether the specific optical cable has the coil stay can be judged through system query, and then the actual fault distance is calculated through different calculation methods according to whether the optical cable has the coil stay.
And step 104, dividing the first distance by the first cable skin length and multiplying the first distance by the length of the optical cable on the map to obtain the actual fault distance of the optical cable when no reel is left.
It should be noted that the length of the optical cable on the map refers to the length of the optical cable path on the map, and can be obtained through query by the system, that is, the length of the optical cable on the map is known, and the actual fault distance of the optical cable when the optical cable is not around is obtained through calculation in step 104, and it should be noted that the actual fault distance refers to the distance from the measurement point to the fault point on the map, and for convenience of understanding, it can be represented by formula (2).
(2)d＝(i/La)*D
And 105, acquiring the interval coiling length of the optical cable between the fault point and the measuring point and the total coiling length of the optical cable, taking the difference between the first distance and the interval coiling length as a first difference value, taking the first optical cable skin length and the total coiling length of the optical cable as a second difference value, dividing the first difference value by the second difference value, and multiplying the second difference value by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when coiling is left.
It should be noted that, the total remaining length of the optical cable after the optical cable laying project is completed is recorded into the system, and can be obtained through system query, the remaining length of the optical cable between the OTDR measurement point and the fault point can be obtained through simple calculation of the information recorded into the system, and the actual fault distance of the optical cable when the optical cable is left is obtained through calculation in step 105, and can be represented by formula (3) for easy understanding.
(3)d＝(l-s1/L-S)*D
According to the method and the device, firstly, the optical cable with the fault is tested through the OTDR to obtain the length from the fault point to the test point on the optical cable, then whether the optical cable with the fault has the disc remaining condition or not is judged according to system query, the fault optical cable is divided into the two conditions of the disc remaining condition and the disc remaining condition, and the distance from the measurement point of the fault optical cable to the fault point on the map is obtained through different calculation methods according to the optical cable related information obtained by the query system, so that the technical problem that in the prior art, the accurate distance of the optical cable fault point on the map cannot be accurately detected due to the fact that the OTDR detects the length of the optical cable fiber core but the disc remaining condition exists in the laying of.
The foregoing is a detailed description of a first embodiment of a distribution network communication optical cable fault distance detection method provided by the present application, and the following is a detailed description of a second embodiment of a distribution network communication optical cable fault distance detection method provided by the present application.
Referring to fig. 2, a second embodiment of the present application provides a method for detecting a distribution network communication optical cable fault distance based on the first embodiment of the present application, including:
It should be noted that, first, a data request packet is sent to determine whether a link is normal, when the number of times of sending data requests exceeds a preset number and no response is received, the link is determined to be in an interrupted state, then a test request signal is sent to the link, the test request signal includes signals such as a service object, a test reason, a request sequence number, and finally, a system feeds back a test result including information such as a test optical cable object, a fiber core state, a test service object, an interruption result, an interruption starting end device ID, an interruption distance, a request sequence number, and the like.
And 102, dividing the length of the fiber core of the optical cable by the sum of 1 and the optical cable stranding rate to obtain the skin length of the first optical cable.
It should be noted that after step 102 is executed, step 202 is also required before step 203 or step 204 is executed;
It should be noted that lengths of bare fibers in all splice boxes on the optical cable, lengths of bare fibers in the splice boxes, and lengths of bare fibers in the splice boxes between the OTDR measurement point and the fault point may be obtained through system query, and the actual fault distance of the optical cable when the splice box is overhead and has no tower may be calculated in step 203, and for convenience of understanding, may be represented by formulas (4) and (5).
(4)Lb＝(L1-F)/(1+P)
(5)d＝((i-f1)/Lb)*D
And 204, performing subtraction on the first distance and the length of the optical cable reserved on the tower between the OTDR measuring point and the fault point, dividing by the difference between the skin length of the first optical cable and the total length of all the optical cables on the tower, and finally multiplying by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the optical cable is overhead with the tower.
It should be noted that the length of the optical cable reserved on the tower between the OTDR measurement point and the fault point and the total lengths of all the optical cables on the tower can be obtained by querying the system, and the actual fault distance of the optical cable when the tower is overhead is obtained through calculation in step 204, and is expressed by formula (6) for easy understanding.
(6)d＝(i-t1/La-T)*D
And step 205, calculating the fault fiber core, the ODF connected with the fault fiber core and the actual fault distance through GIS system analysis and/or local analysis to obtain the specific position of the optical cable fault on the map.
It should be noted that the GIS system, that is, the geographic information system, can perform functions such as calculation and display on a map for data, the local analysis is that the site position and the optical cable direction can be visually displayed through the optical cable network topological diagram of the system, and the ODF, that is, the optical cable distribution box, is used for terminating and distributing the local end trunk optical cable in the optical fiber communication system, and can conveniently realize connection, distribution, scheduling and the like of the optical fiber line; the GIS system can obtain the location of the fault on the map through the actual fault distance obtained by the calculation of the steps, the ODF connected with the fault fiber core and the corresponding fault fiber core.
According to the distribution network communication optical cable fault distance detection method provided by the second embodiment of the application, information such as a link generating a fault and a specific optical cable is found through a data sending request packet and a test request signal at regular time, then the distance of the fault on the optical cable is obtained through an OTDR test, then the actual fault distance of the optical cable when the optical cable is overhead and a joint box is not arranged on a tower and the optical cable when the optical cable is overhead and a tower is arranged on the tower is obtained through different calculation formulas according to the type of the optical cable laying, and finally the accurate positioning of the fault point of the optical cable on a map is obtained through GIS system analysis and/or local analysis according to the obtained actual fault distance, so that the technical problem that the fault positioning is inaccurate due to inaccurate calculation of the fault distance of the optical cable in.
Referring to fig. 3, a third embodiment of the present application provides a distribution network communication optical cable fault distance detection system, including:
failure detection unit 301: the device link fault detection method comprises the steps of measuring a first distance between a fault point and a measuring point on an optical cable through an OTDR (optical time domain reflectometer) when the optical cable of a device link is detected to be in fault;
the first calculation unit 302: dividing the length of the fiber core of the optical cable by the sum of 1 and the optical cable stranding rate to obtain a first optical cable skin length;
disc remaining determination unit 303: the device is used for judging whether the optical cable has a disc, if not, the second calculating unit 304 is triggered, and if so, the third calculating unit 305 is triggered;
the second calculation unit 304: the distance measuring device is used for dividing the first distance by the first optical cable skin length and multiplying the first optical cable skin length by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when no reel is left;
third calculation unit 305: and the method is used for dividing the difference between the first distance and the optical cable reel remaining length between the OTDR measuring point and the fault point by the difference between the first optical cable sheath length and the optical cable reel remaining length, and multiplying the difference by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the optical cable reel remains.
Optionally, the method further comprises:
the fourth calculation unit 306: the second optical cable sheath length is obtained by dividing the difference between the fiber core length and the bare fiber length in all the splice boxes on the optical cable by the sum of the first distance and the optical cable stranding rate;
fifth calculation unit 307: and the method is used for dividing the difference between the first distance and the bare fiber length in the splice box by the second cable sheath length and then multiplying the difference by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the splice box is overhead and has no tower, wherein the bare fiber length in the splice box is the bare fiber length in the splice box between the OTDR measuring point and the fault point.
Optionally, the method further comprises:
the sixth calculation unit 308: and the method is used for carrying out subtraction operation on the first distance and the length of the optical cable reserved on the tower between the OTDR measuring point and the fault point, dividing the subtraction operation by the difference between the skin length of the first optical cable and the total length branches of all the optical cables on the tower, and finally multiplying the difference by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the optical cable is overhead with the tower.
Optionally, the method further comprises:
data transmission unit 309: for sending a request packet from the first end of the device to the second end of the device;
failure determination unit 310: and the method is used for sending a test request signal to test the optical cable when the preset times of continuous sending of the data request packets are unresponsive so as to obtain an optical cable fault detection result, wherein the test request signal comprises a service object, a test reason and a request sequence number.
Optionally, the method further comprises:
the fault locating unit 311: the method is used for calculating the fault fiber core, the ODF connected with the fault fiber core and the actual fault distance through GIS system analysis and/or local analysis to obtain the specific position of the optical cable fault on the map.
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 terms "first," "second," "third," "fourth," and the like in the description of the application and the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, 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.
It should be understood that in the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" for describing an association relationship of associated objects, indicating that there may be three relationships, e.g., "a and/or B" may indicate: only A, only B and both A and B are present, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
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 application may be substantially implemented or contributed to 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 execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should 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 in the embodiments of the present application.
Claims (10)
1. A distribution network communication optical cable fault distance detection method is characterized by comprising the following steps:
s1: when detecting that an optical cable of an equipment link has a fault, measuring a first distance between a fault point and a measuring point on the optical cable through OTDR;
s2: dividing the length of the fiber core of the optical cable by the sum of 1 and the optical cable stranding rate to obtain a first optical cable skin length;
s3: judging whether the optical cable has a disc, if not, executing S4, and if so, executing S5;
s4: dividing the first distance by the skin length of the first optical cable and multiplying the skin length of the first optical cable by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the optical cable is not coiled;
s5: and obtaining the interval coiling length of the optical cable between the fault point and the measuring point and the total coiling length of the optical cable, taking the difference between the first distance and the interval coiling length as a first difference value, taking the first optical cable skin length and the total coiling length of the optical cable as a second difference value, dividing the first difference value by the second difference value, and multiplying the length of the optical cable on a map to obtain the actual fault distance of the optical cable when coiling is left.
2. The method for detecting the fault distance of the distribution network communication optical cable according to claim 1, further comprising:
dividing the difference between the fiber core length and the bare fiber length in all splice boxes on the optical cable by the sum of the first distance and the optical cable stranding rate to obtain a second optical cable sheath length;
and dividing the difference between the first distance and the bare fiber length in the splice box by the second cable sheath length, and multiplying the difference by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the splice box is overhead and has no tower, wherein the bare fiber length in the splice box is the bare fiber length in the splice box between an OTDR measuring point and a fault point.
3. The method for detecting the fault distance of the distribution network communication optical cable according to claim 1, further comprising:
and subtracting the first distance and the length of the optical cable reserved on the tower between the OTDR measuring point and the fault point, dividing by the difference between the skin length of the first optical cable and the total length of all the optical cables on the tower, and finally multiplying by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the optical cable is overhead with the tower.
4. The method for detecting the fault distance of the distribution network communication optical cable according to claim 1, further comprising:
sending a request data packet from the first end of the device to the second end of the device;
and when the preset times of continuous sending of the data request packets are not responded, sending a test request signal to test the optical cable to obtain an optical cable fault detection result, wherein the test request signal comprises a service object, a test reason and a request serial number.
5. The method for detecting the fault distance of the distribution network communication optical cable according to claim 1, further comprising:
and calculating a fault fiber core, an ODF connected with the fault fiber core and the actual fault distance through GIS system analysis and/or local analysis to obtain the specific position of the optical cable fault on a map.
6. A distribution network communication optical cable fault distance detection system is characterized by comprising:
a fault detection unit: the device comprises an OTDR (optical time domain reflectometer) module, a first distance measuring module and a second distance measuring module, wherein the first distance measuring module is used for measuring a first distance between a fault point and a measuring point on an optical cable through the OTDR when the optical cable of a device link is detected to be in fault;
the first calculation unit: dividing the length of the fiber core of the optical cable by the sum of 1 and the optical cable stranding rate to obtain a first optical cable skin length;
a disk remaining determination unit: the device is used for judging whether the optical cable has a disc, if not, triggering a second calculating unit, and if so, triggering a third calculating unit;
a second calculation unit: the distance measuring device is used for dividing the first distance by the skin length of a first optical cable and multiplying the skin length of the first optical cable by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the optical cable is not coiled;
a third calculation unit: and the method is used for obtaining the interval coiling length of the optical cable between the fault point and the measuring point and the total coiling length of the optical cable, taking the difference between the first distance and the interval coiling length as a first difference value, taking the first optical cable skin length and the total coiling length of the optical cable as a second difference value, dividing the first difference value by the second difference value, and multiplying the second difference value by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when coiling is left.
7. The distribution network communication optical cable fault distance detection system of claim 6, further comprising:
a fourth calculation unit: the second optical cable sheath length is obtained by dividing the difference between the fiber core length and the bare fiber length in all the splice boxes on the optical cable by the sum of the first distance and the optical cable stranding rate;
a fifth calculation unit: and the difference between the first distance and the bare fiber length in the splice box is divided by the second cable sheath length, and then the difference is multiplied by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the splice box is overhead and has no tower, wherein the bare fiber length in the splice box is the bare fiber length in the splice box between an OTDR measurement point and a fault point.
8. The distribution network communication optical cable fault distance detection system of claim 6, further comprising:
a sixth calculation unit: and the method is used for carrying out subtraction operation on the first distance and the length of the optical cable reserved on the tower between the OTDR measuring point and the fault point, dividing the subtraction operation by the difference between the first optical cable skin length and the total length branches of all the optical cables on the tower, and finally multiplying the difference by the length of the optical cable on a map to obtain the actual fault distance of the optical cable when the optical cable is overhead with the tower.
9. The distribution network communication optical cable fault distance detection system of claim 6, further comprising:
a data transmission unit: for sending a request packet from the first end of the device to the second end of the device;
a fault determination unit: and when the preset times of continuous sending of the data request packets are not responded, sending a test request signal to test the optical cable to obtain an optical cable fault detection result, wherein the test request signal comprises a service object, a test reason and a request sequence number.
10. The distribution network communication optical cable fault distance detection system of claim 6, further comprising:
a fault location unit: and the method is used for calculating the fault fiber core, the ODF connected with the fault fiber core and the actual fault distance through GIS system analysis and/or local analysis to obtain the specific position of the optical cable fault on the map.
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