CN115524096A - Optical fiber line attenuation measuring method and device, electronic equipment and storage medium - Google Patents
Optical fiber line attenuation measuring method and device, electronic equipment and storage medium Download PDFInfo
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- CN115524096A CN115524096A CN202211318427.7A CN202211318427A CN115524096A CN 115524096 A CN115524096 A CN 115524096A CN 202211318427 A CN202211318427 A CN 202211318427A CN 115524096 A CN115524096 A CN 115524096A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
- G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
- G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
- G01M11/3118—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR using coded light-pulse sequences
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
- G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
- G01M11/3145—Details of the optoelectronics or data analysis
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Abstract
The invention discloses an optical fiber line attenuation measuring method which is applied to a system comprising a measured optical fiber, a light reflector and an optical fiber line attenuation measuring device. Therefore, the speed of optical fiber line attenuation measurement can be increased on the premise of reducing the arrangement requirement of active equipment, and the system cost and the measurement workload are greatly reduced.
Description
Technical Field
The invention relates to the technical field of optical fiber measurement, in particular to an optical fiber line attenuation measurement method. The invention also relates to an optical fiber line attenuation measuring device, electronic equipment and a storage medium.
Background
When measuring the attenuation of an optical fiber line, two methods are generally adopted: firstly, the measurement is carried out by using a light source and an optical power meter, and secondly, the measurement is carried out by using OTDR. The two measurement modes are respectively as follows:
(1) When the optical source and the optical power meter are used for carrying out optical fiber line attenuation measurement, an optical signal needs to be injected into a measured optical fiber at one end of the measured optical fiber by using the optical source, meanwhile, the level of the received optical signal power is measured at the other end of the measured optical fiber by using the optical power meter, and then the level of the optical power received by the optical power meter is subtracted from the luminous power level of the optical source, so that the optical fiber line attenuation level can be obtained;
(2) When the OTDR is used for carrying out the attenuation measurement of the optical fiber line, the attenuation level of the optical fiber line can be obtained only by using the OTDR measurement at one end of the measured optical fiber.
Aiming at the two existing methods for measuring the attenuation of the optical fiber line, the method for measuring the attenuation of the optical fiber line by using the light source and the optical power meter has the advantages that the cost of the measuring instrument is low, but measuring personnel are usually required to operate at two ends of the measured optical fiber, so that the efficiency is low; the method for measuring the attenuation of the optical fiber line by using the OTDR has the advantages that only a measuring person needs to operate one end of the measured optical fiber, the efficiency is high, and the cost of the measuring instrument is high.
The inventor finds in the process of implementing the present invention that when attenuation measurements need to be simultaneously performed for a large number of optical fibers in an optical cable on-line monitoring system, it usually takes ten seconds to 1 minute to measure one optical fiber; when the optical switches are used for alternate measurement, one time of measurement can even take half an hour when the number of the monitored optical fibers is large. Therefore, in an optical cable on-line monitoring system, in order to meet the real-time measurement requirement, the commonly adopted scheme is as follows: besides the measurement by the OTDR plus optical switch in turn, for each measured optical fiber, a light source and an optical power meter are respectively placed at both ends of the measured optical fiber, and once it is monitored that the line attenuation of a certain measured optical fiber exceeds a threshold, the optical switch is commanded to switch to the measured optical fiber to start the OTDR to measure the performance of the measured optical fiber. Therefore, active devices need to be placed at both ends of the measured optical fiber, and an OTDR measuring instrument needs to be deployed at the same time, which not only increases the cost of the measuring device, but also increases a device station and matched devices such as a power supply, and greatly increases the cost of the optical fiber attenuation measurement.
Disclosure of Invention
The embodiment of the invention provides an optical fiber line attenuation measurement method and device, electronic equipment and a storage medium, which are used for improving the speed of optical fiber line attenuation measurement and greatly reducing the system cost and the measurement workload on the premise of reducing the arrangement requirement of active equipment.
In a first aspect, an optical fiber line attenuation measuring method is provided, which is applied to a system including a measured optical fiber, a light reflector, and an optical fiber line attenuation measuring device, where the light reflector is connected to one end of the measured optical fiber, and the optical fiber line attenuation measuring device is connected to the other end of the measured optical fiber, and the method includes:
transmitting a light measurement pulse signal to the measured optical fiber through the optical fiber line attenuation measuring device, the light measurement pulse signal being divided by the optical fiber line attenuation measuring device into an original light measurement pulse signal that has not passed through the measured optical fiber and a contrast light measurement pulse signal that has passed through the measured optical fiber and has been reflected by the light reflector;
acquiring a first data set corresponding to the original optical measurement pulse signal from the measurement data acquired by the optical fiber line attenuation measuring device, and acquiring a second data set corresponding to the comparison optical measurement pulse signal from the measurement data acquired by the optical fiber line attenuation measuring device, the first data set being acquired based on the number of optical measurement pulse signals, the second data set being acquired based on a parameter of circuit noise in the measurement data;
and determining the attenuation value of the measured optical fiber according to the first data group and the second data group.
In some embodiments, before obtaining the first data set corresponding to the raw optical measurement pulse signal from the measurement data collected by the fiber optic line attenuation measurement device, further comprising:
converting the signals received by the fiber line attenuation measuring device into a data set;
extracting a signal data set and a circuit noise data set from the data;
and processing the signal data group according to the circuit noise group to obtain the measurement data.
In some embodiments, the obtaining a first data set corresponding to the original optical measurement pulse signal from the measurement data collected by the fiber line attenuation measurement device specifically includes:
and using the continuous number of the measurement data with the value larger than a first threshold value as the first data group, wherein the first threshold value is a specified multiple of the number of the light measurement pulse signals.
In some embodiments, the obtaining a second data set corresponding to the contrast light measurement pulse signal from the measurement data collected by the fiber line attenuation measurement device specifically includes:
and taking the last group of continuous numbers with the numerical values larger than a second threshold value in the measurement data as the second data group, wherein the second threshold value is a specified multiple of the root mean square of the circuit noise data group.
In some embodiments, determining the attenuation value of the measured optical fiber according to the first data set and the second data set specifically includes:
determining an average of the first data set and the second data set, respectively;
and determining the attenuation value according to the average value of the first data group, the average value of the second data group and a preset calibration value.
In a second aspect, an optical fiber line attenuation measuring device is provided, which is applied to a system including a measured optical fiber, a light reflector, and the optical fiber line attenuation measuring device, wherein the light reflector is connected to one end of the measured optical fiber, the optical fiber line attenuation measuring device is connected to the other end of the measured optical fiber, and the optical fiber line attenuation measuring device includes:
the optical transmitter is connected with the optical branching module and used for transmitting an optical measurement pulse signal to the tested optical fiber through the optical branching module;
the optical branching module is respectively connected with the tested optical fiber and the signal conversion module, and is used for dividing the optical measurement pulse signal into an original optical measurement pulse signal which does not pass through the tested optical fiber and a contrast optical measurement pulse signal which passes through the tested optical fiber and is reflected by the optical reflector;
the signal conversion module is connected with the optical branching module and is used for acquiring a first data set corresponding to the original optical measurement pulse signal and acquiring a second data set corresponding to the comparison optical measurement pulse signal from the measurement data acquired by the optical fiber line attenuation measurement device, wherein the first data set is acquired based on the number of the optical measurement pulse signals, and the second data set is acquired based on the parameters of the circuit noise in the measurement data;
and the control and calculation module is used for determining the attenuation value of the measured optical fiber according to the first data group and the second data group.
In some embodiments, the optical splitting module specifically comprises a first optical splitter and a second optical splitter, wherein:
the first optical splitter is connected with the optical transmitter and the tested optical fiber and is used for splitting the optical measurement pulse signal into a signal emitted to the tested optical fiber and a signal emitted to the second optical splitter;
the second optical splitter is respectively connected to the first optical splitter and the signal conversion module, and is configured to send the contrast optical measurement pulse signal that passes through the measured optical fiber and is reflected by the optical reflector, and the original optical measurement pulse signal that does not pass through the measured optical fiber to the signal conversion module.
In some embodiments, the signal conversion module specifically comprises a transimpedance amplifier and an analog-to-digital conversion circuit, wherein:
the transimpedance amplifier is respectively connected with the second optical splitter and the analog-to-digital conversion circuit and is used for receiving the pulse signal transmitted by the second optical splitter and outputting the pulse signal to the analog-to-digital conversion circuit;
the analog-to-digital conversion circuit is respectively connected with the transimpedance amplifier and the control and calculation module, and is used for sampling and digitally converting signals output by the transimpedance amplifier and then sending the signals to the control and calculation module.
In a third aspect, an electronic device includes:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor is configured to perform the fiber optic line attenuation measurement method of any one of the above via execution of the executable instructions.
In a fourth aspect, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method of fiber optic line attenuation measurement as defined in any one of the above.
By applying the technical scheme, the optical fiber line attenuation measuring method is applied to a system comprising a measured optical fiber, an optical reflector and an optical fiber line attenuation measuring device, the optical fiber line attenuation measuring device emits an optical measurement pulse signal to the measured optical fiber, a first data group corresponding to an original optical measurement pulse signal is acquired from measurement data collected by the optical fiber line attenuation measuring device, a second data group corresponding to a comparison optical measurement pulse signal is acquired from the measurement data collected by the optical fiber line attenuation measuring device, and an attenuation value of the measured optical fiber is determined according to the first data group and the second data group. Therefore, the speed of optical fiber line attenuation measurement can be increased on the premise of reducing the arrangement requirement of active equipment, and the system cost and the measurement workload are greatly reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart of an optical fiber line attenuation measuring method according to the present invention;
FIG. 2 is a block diagram of an optical fiber line attenuation measuring device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a measurement data signal a obtained by an optical fiber line attenuation measurement apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a measurement data signal b obtained by the fiber line attenuation measurement apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating the steps for performing attenuation measurements on an optical fiber line according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an optical fiber line attenuation measuring device according to the present invention.
Detailed Description
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.
It is noted that other embodiments of the present application will become readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise construction and arrangements of parts which have been described below and illustrated in the accompanying drawings, and that various modifications and changes can be made therein without departing from the scope thereof. The scope of the application is limited only by the appended claims.
A method for measuring attenuation of an optical fiber line according to an exemplary embodiment of the present application is described below with reference to fig. 1. It should be noted that the following application scenarios are merely illustrated for facilitating understanding of the spirit and principles of the present application, and the embodiments of the present application are not limited in any way in this respect. Rather, embodiments of the present application may be applied to any scenario where applicable.
It should be noted that, the method is applied to a system including a measured optical fiber, a light reflector, and an optical fiber line attenuation measuring device, where the light reflector is connected to one end of the measured optical fiber, and the optical fiber line attenuation measuring device is connected to the other end of the measured optical fiber, and the method includes the following steps:
and S101, transmitting a light measurement pulse signal to the measured optical fiber through the optical fiber line attenuation measuring device, wherein the light measurement pulse signal is divided into an original light measurement pulse signal which does not pass through the measured optical fiber and a contrast light measurement pulse signal which passes through the measured optical fiber and is reflected by the optical reflector by the optical fiber line attenuation measuring device.
S102, obtaining a first data set corresponding to the original optical measurement pulse signal from the measurement data collected by the optical fiber line attenuation measurement device, and obtaining a second data set corresponding to the contrast optical measurement pulse signal from the measurement data collected by the optical fiber line attenuation measurement device, wherein the first data set is obtained based on the number of the optical measurement pulse signals, and the second data set is obtained based on a parameter of circuit noise in the measurement data.
In this embodiment, before obtaining the first data group corresponding to the original optical measurement pulse signal from the measurement data collected by the optical fiber line attenuation measurement device, the method further includes:
and converting the signals received by the optical fiber line attenuation measuring device into a data group, extracting a signal data group and a circuit noise data group from the data, and processing the signal data group according to the circuit noise group to obtain the measuring data.
In a specific application scenario, a first data group corresponding to the original optical measurement pulse signal is acquired from measurement data acquired by the optical fiber line attenuation measurement device, specifically:
and taking a continuous number of the measurement data with a value greater than a first threshold value as the first data group, wherein the first threshold value is a specified multiple of the number of the light measurement pulse signals.
And a second data group corresponding to the contrast light measurement pulse signal is acquired from the measurement data acquired by the optical fiber line attenuation measurement device, specifically:
and taking the last group of continuous numbers with the numerical values larger than a second threshold value in the measurement data as the second data group, wherein the second threshold value is a specified multiple of the root mean square of the circuit noise data group.
S103, determining the attenuation value of the measured optical fiber according to the first data group and the second data group.
In this embodiment, after the average values of the first data group and the second data group are determined, the attenuation value is determined according to the average value of the first data group, the average value of the second data group, and a preset calibration value.
By applying the technical scheme, the optical fiber line attenuation measuring method is applied to a system comprising a measured optical fiber, an optical reflector and an optical fiber line attenuation measuring device, the optical fiber line attenuation measuring device emits an optical measurement pulse signal to the measured optical fiber, a first data group corresponding to an original optical measurement pulse signal is acquired from measurement data collected by the optical fiber line attenuation measuring device, a second data group corresponding to a comparison optical measurement pulse signal is acquired from the measurement data collected by the optical fiber line attenuation measuring device, and an attenuation value of the measured optical fiber is determined according to the first data group and the second data group. Therefore, the speed of optical fiber line attenuation measurement can be increased on the premise of reducing the arrangement requirement of active equipment, and the system cost and the measurement workload are greatly reduced.
In order to achieve the above object, the present invention further provides an optical fiber line attenuation measuring apparatus, which is applied to a system including a measured optical fiber, an optical reflector, and the optical fiber line attenuation measuring apparatus, as shown in fig. 6, wherein the optical reflector is connected to one end of the measured optical fiber, and the optical fiber line attenuation measuring apparatus is connected to the other end of the measured optical fiber, and the optical fiber line attenuation measuring apparatus includes:
the optical transmitter 610 is connected to the optical branching module, and configured to transmit an optical measurement pulse signal to the measured optical fiber through the optical branching module;
the optical branching module 620 is connected to the tested optical fiber and the signal conversion module, and configured to divide the optical measurement pulse signal into an original optical measurement pulse signal that does not pass through the tested optical fiber and a contrast optical measurement pulse signal that passes through the tested optical fiber and is reflected by the optical reflector;
the signal conversion module 630 is connected to the optical splitting module, and is configured to acquire a first data set corresponding to the original optical measurement pulse signal and acquire a second data set corresponding to the comparison optical measurement pulse signal from the measurement data collected by the optical fiber line attenuation measurement device, where the first data set is acquired based on the number of optical measurement pulse signals and the second data set is acquired based on a parameter of circuit noise in the measurement data;
a control and calculation module 640, configured to determine an attenuation value of the measured optical fiber according to the first data set and the second data set.
In this embodiment, the optical splitting module specifically includes a first optical splitter and a second optical splitter, where:
the first optical splitter is connected with the optical transmitter and the tested optical fiber and is used for splitting the optical measurement pulse signal into a signal emitted to the tested optical fiber and a signal emitted to the second optical splitter;
the second optical splitter is respectively connected to the first optical splitter and the signal conversion module, and is configured to send the contrast light measurement pulse signal that passes through the measured optical fiber and is reflected by the optical reflector, and the original light measurement pulse signal that does not pass through the measured optical fiber to the signal conversion module.
In this embodiment, the signal conversion module specifically includes a transimpedance amplifier and an analog-to-digital conversion circuit, where:
the transimpedance amplifier is respectively connected with the second optical splitter and the analog-to-digital conversion circuit and is used for receiving the pulse signal transmitted by the second optical splitter and outputting the pulse signal to the analog-to-digital conversion circuit;
the analog-to-digital conversion circuit is respectively connected with the transimpedance amplifier and the control and calculation module, and is used for sampling and digitally converting signals output by the transimpedance amplifier and then sending the signals to the control and calculation module.
In order to further explain the technical idea of the present invention, the technical solution of the present invention is now described with reference to specific application scenarios. The present embodiment aims to provide an optical fiber line attenuation measurement method, which improves the speed of optical fiber line attenuation measurement and greatly reduces the system cost and the measurement workload on the premise of reducing the arrangement requirements of active devices. In the following embodiments, only 1 optical reflector needs to be connected to the end of the measured optical fiber, and the optical fiber line attenuation measuring device of the present invention is used at the start end of the measured optical fiber, and the total attenuation value of the optical fiber link is obtained by measuring the optical signal level generated by the optical reflector and calculating.
As shown in fig. 2, the present invention is a structure of an attenuation measuring apparatus for an optical fiber line:
an optical fiber line attenuation measuring device comprises an optical transmitter, a 2x2 optical splitter, a 1x2 optical splitter, an optical reflector, a PIN transimpedance amplifier (PIN-TIA), a 10-bit analog-to-digital conversion circuit (ADC), and a calculation and control unit.
The calculating and controlling unit is connected with an optical transmitter and an analog-to-digital conversion circuit, the optical transmitter is connected to one end of the tested optical fiber through a 2x2 optical splitter, the other end of the tested optical fiber is connected with an optical reflector, the 2x2 optical splitter is connected with a 1x2 optical splitter, the 1x2 optical splitter is connected with a PIN transimpedance amplifier, and the PIN transimpedance amplifier is connected with the analog-to-digital conversion circuit.
Wherein, the splitting ratio of the 2x2 optical splitter is 50:50, uniform splitting ratio; the splitting ratio of the 1x2 optical splitter is 1:99; the analog-to-digital conversion circuit employs a 10-bit 50MSPS, typically adc10065 by the american TI company; an F-P type LD is adopted in an optical transmitter, the peak power range of output optical pulses is between-3 dBm and 5dBm, and the typical value is 0dBm; the light reflector adopts a film-coated light reflector, and the reflectivity value ranges from 0dBm to-3 dBm; the PIN transimpedance amplifier is formed by an operational amplifier with a unit gain bandwidth larger than 500 MHz; the light detector adopts a PIN photoelectric detector.
Wherein, the width range of the optical measurement pulse signal emitted by the optical transmitter is 100ns to 1000ns; the pulse signal interval time ranges from 1ms to 2ms.
After passing through the 2x2 optical splitter and the 1x2 optical splitter, a part of signals output by the optical transmitter directly reach the PIN transimpedance amplifier without passing through a tested optical fiber.
A part of signals output by the optical transmitter pass through a 2x2 optical splitter, a tested optical fiber, an optical reflector, the tested optical fiber, a 2x2 optical splitter and a 1x2 optical splitter and then reach the PIN transimpedance amplifier.
Fig. 3 and 4 show data obtained by sampling the output signal of the PIN transimpedance amplifier by the ADC, where fig. 4 is a display obtained by vertically amplifying fig. 3.
Wherein the pulse signal [ A 1-1 ]The optical fiber detection circuit is generated by directly reaching a PIN transimpedance amplifier without passing through a detected optical fiber after a part of signals output by an optical transmitter pass through a 2x2 optical splitter and a 1x2 optical splitter; pulse signal [ A 1-2 ]The optical fiber coupler is characterized in that a part of signals output by an optical transmitter pass through a 2x2 optical splitter, a tested optical fiber, an optical reflector, the tested optical fiber, a 2x2 optical splitter and a 1x2 optical splitter and then reach a PIN transimpedance amplifier.
As shown in fig. 5, an embodiment of the present invention further provides a method for measuring attenuation of an optical fiber line, where the method is applied to a measurement apparatus, and the method includes the following steps:
a) Connecting an optical fiber line attenuation measuring device with a measured optical fiber:
connecting a measuring signal port of the optical fiber line attenuation measuring device to one end of a measured optical fiber, and connecting the other end of the measured optical fiber to a light reflector;
b) Obtaining measurement data [ B i ]：
The calculation and control unit controls the optical transmitter to transmit N optical measurement pulse signals; when a light measurement pulse signal is sent, the analog-to-digital conversion circuit synchronously carries out analog-to-digital conversion, samples and digitally converts the output signal of the PIN mutual resistance amplifier and then sends the output signal to the calculation and control unit; after the calculation and control unit obtains N groups of data, the data are accumulated to obtain a group of measurement data [ B ] i ](ii) a Wherein: the width range of the light measurement pulse signal is 100ns to 1000ns; the interval time of the pulse signal ranges from 1ms to 2ms; n ranges from 10 to 1000, with a typical value of 100;
c) Data [ B ] i ]Carrying out a zeroing operation:
in the data [ B i ]In at least two parts of signal data [ B ] 1 ]、[B 2 ]Wherein: data [ B ] 1 ]
Including fiber scattering signals, light reflection signals, data [ B ] 2 ]The optical signal is not contained at all, and only the circuit noise is contained; with data [ B ] 2 ]Average of 0 baseline, for data [ B ] i ]Performing zeroing operation to obtain data [ A ] i ]；
d) From data [ A ] i ]Part of the signal output by the optical transmitter is found to reach a pulse signal [ A ] generated by a PIN transimpedance amplifier after passing through a 2x2 optical splitter and a 1x2 optical splitter 1-1 ]：
Data [ A ] i ]Includes data [ A ] 1-1 ]: after passing through the 2x2 optical splitter and the 1x2 optical splitter, a part of signals output by the optical transmitter reach a pulse signal [ A ] generated by the PIN transimpedance amplifier 1-1 ]；
From data [ A ] i ]Find data [ A ] in 1-1 ]: in the data [ A ] i ]In the method, a first set of consecutive numbers with a value greater than 50N is sought, these consecutive numbers constituting the data [ A ] 1-1 ]；
e) From data [ A ] i ]Part of the signal output by the optical transmitter is reflected by the optical reflector through the 2x2 optical splitter and the optical fiber to be detected, and then reaches the pulse signal [ A ] generated by the PIN transimpedance amplifier through the 1x2 optical splitter 1-2 ]：
Data [ A ] i ]Contains data [ A ] 1-2 ]: part of signals output by the optical transmitter pass through a 2x2 optical splitter and a measured optical fiber, are reflected by an optical reflector, and then reach a pulse signal [ A ] generated by a PIN transimpedance amplifier through the 1x2 optical splitter 1-2 ]；
From data [ A ] i ]Find data [ A ] in 1-2 ]: at data [ A ] i ]In the method, a final set of consecutive numbers with a value greater than 100 delta is found, which constitute the data [ A ] 1-2 ]And delta is the circuit noise root mean square, i.e. data [ B ] 2 ]Root mean square of (d);
f) Calculating data [ A ] 1-1 ]Average value of a 1-1 And data [ A ] 1-2 ]Average value of a 1-2 ；
Calculating the attenuation value alpha of the optical fiber line: α =5xlg (a) 1-1 /a 1-2 )+α 0 In which α is 0 Is a calibration value.
By applying the technical scheme, the optical fiber line attenuation measuring method is applied to a system comprising a measured optical fiber, an optical reflector and an optical fiber line attenuation measuring device, the optical fiber line attenuation measuring device emits an optical measurement pulse signal to the measured optical fiber, a first data group corresponding to an original optical measurement pulse signal is acquired from measurement data collected by the optical fiber line attenuation measuring device, a second data group corresponding to a comparison optical measurement pulse signal is acquired from the measurement data collected by the optical fiber line attenuation measuring device, and an attenuation value of the measured optical fiber is determined according to the first data group and the second data group. Therefore, the speed of optical fiber line attenuation measurement can be increased on the premise of reducing the arrangement requirement of active equipment, and the system cost and the measurement workload are greatly reduced.
Correspondingly, the invention also provides an electronic device, comprising:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor is configured to perform a method of fiber optic line attenuation measurement as described in any one of the above via execution of the executable instructions.
Accordingly, the present invention also proposes a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements a method for measuring attenuation of an optical fiber line as described above.
By applying the technical scheme, the optical fiber line attenuation measuring method is applied to a system comprising a measured optical fiber, an optical reflector and an optical fiber line attenuation measuring device, the optical fiber line attenuation measuring device emits an optical measurement pulse signal to the measured optical fiber, a first data group corresponding to an original optical measurement pulse signal is acquired from measurement data collected by the optical fiber line attenuation measuring device, a second data group corresponding to a comparison optical measurement pulse signal is acquired from the measurement data collected by the optical fiber line attenuation measuring device, and an attenuation value of the measured optical fiber is determined according to the first data group and the second data group. Therefore, the speed of optical fiber line attenuation measurement can be increased on the premise of reducing the arrangement requirement of active equipment, and the system cost and the measurement workload are greatly reduced.
The communication bus may be a PCI (Peripheral Component Interconnect) bus, an EISA (Extended Industry standard architecture) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface is used for communication between the terminal and other equipment.
The Memory may include a RAM (Random Access Memory) or may include a non-volatile Memory, such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor including a CPU (Central Processing Unit), an NP (Network Processor), and the like; but also a DSP (Digital Signal Processing), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to be performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, digital subscriber line) or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk), among others.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. An optical fiber line attenuation measuring method applied to a system comprising a measured optical fiber, an optical reflector and an optical fiber line attenuation measuring device, wherein the optical reflector is connected with one end of the measured optical fiber, and the optical fiber line attenuation measuring device is connected with the other end of the measured optical fiber, the method comprising:
transmitting a light measurement pulse signal to the measured optical fiber through the optical fiber line attenuation measuring device, the light measurement pulse signal being divided by the optical fiber line attenuation measuring device into an original light measurement pulse signal that has not passed through the measured optical fiber and a contrast light measurement pulse signal that has passed through the measured optical fiber and has been reflected by the light reflector;
acquiring a first data set corresponding to the original optical measurement pulse signal from the measurement data acquired by the optical fiber line attenuation measuring device, and acquiring a second data set corresponding to the comparison optical measurement pulse signal from the measurement data acquired by the optical fiber line attenuation measuring device, the first data set being acquired based on the number of optical measurement pulse signals, the second data set being acquired based on a parameter of circuit noise in the measurement data;
and determining attenuation values of the tested optical fiber according to the first data group and the second data group.
2. The method of claim 1, further comprising, prior to obtaining a first data set corresponding to the raw light measurement pulse signal from the measurement data collected by the fiber line attenuation measurement device and obtaining a second data set corresponding to the contrast light measurement pulse signal from the measurement data collected by the fiber line attenuation measurement device:
converting the signals received by the fiber line attenuation measuring device into a data set;
extracting a signal data set and a circuit noise data set from the data;
and processing the signal data group according to the circuit noise group to obtain the measurement data.
3. The method according to claim 2, characterized in that a first data set corresponding to the raw optical measurement pulse signal is obtained from the measurement data collected by the fiber optic line attenuation measuring device, in particular:
and using the continuous number of the measurement data with the value larger than a first threshold value as the first data group, wherein the first threshold value is a specified multiple of the number of the light measurement pulse signals.
4. The method according to claim 2, characterized in that a second data set corresponding to the contrast light measurement pulse signal is obtained from the measurement data collected by the fiber optic line attenuation measuring device, in particular:
and taking the last group of continuous numbers with the numerical values larger than a second threshold value in the measurement data as the second data group, wherein the second threshold value is a specified multiple of the root mean square of the circuit noise data group.
5. The method according to any one of claims 1 to 4, wherein the attenuation value of the measured optical fiber is determined from the first data set and the second data set, in particular by:
determining an average of the first data set and the second data set, respectively;
and determining the attenuation value according to the average value of the first data group, the average value of the second data group and a preset calibration value.
6. The utility model provides an optical fiber line attenuation measuring device, be applied to contain and be surveyed optical fiber, light reflector and in optical fiber line attenuation measuring device's the system, its characterized in that, light reflector with be connected by the one end of survey optical fiber, optical fiber line attenuation measuring device with be connected by the other end of survey optical fiber, optical fiber line attenuation measuring device includes:
the optical transmitter is connected with the optical branching module and used for transmitting an optical measurement pulse signal to the tested optical fiber through the optical branching module;
the optical branching module is respectively connected with the tested optical fiber and the signal conversion module, and is used for dividing the optical measurement pulse signal into an original optical measurement pulse signal which does not pass through the tested optical fiber and a contrast optical measurement pulse signal which passes through the tested optical fiber and is reflected by the optical reflector;
the signal conversion module is connected with the optical branching module and is used for acquiring a first data set corresponding to the original optical measurement pulse signal and acquiring a second data set corresponding to the comparison optical measurement pulse signal from the measurement data acquired by the optical fiber line attenuation measurement device, wherein the first data set is acquired based on the number of the optical measurement pulse signals, and the second data set is acquired based on the parameters of the circuit noise in the measurement data;
and the control and calculation module is used for determining the attenuation value of the measured optical fiber according to the first data group and the second data group.
7. The apparatus of claim 6, wherein the optical splitting module specifically comprises a first optical splitter and a second optical splitter, wherein:
the first optical splitter is connected with the optical transmitter and the tested optical fiber and is used for splitting the optical measurement pulse signal into a signal emitted to the tested optical fiber and a signal emitted to the second optical splitter;
the second optical splitter is respectively connected to the first optical splitter and the signal conversion module, and is configured to send the contrast light measurement pulse signal that passes through the measured optical fiber and is reflected by the optical reflector, and the original light measurement pulse signal that does not pass through the measured optical fiber to the signal conversion module.
8. The method of claim 7, wherein the signal conversion module specifically comprises a transimpedance amplifier and an analog-to-digital conversion circuit, wherein:
the transimpedance amplifier is respectively connected with the second optical splitter and the analog-to-digital conversion circuit and is used for receiving the pulse signal transmitted by the second optical splitter and outputting the pulse signal to the analog-to-digital conversion circuit;
the analog-to-digital conversion circuit is respectively connected with the transimpedance amplifier and the control and calculation module, and is used for sampling and digitally converting signals output by the transimpedance amplifier and then sending the signals to the control and calculation module.
9. An electronic device, comprising:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor is configured to perform the fiber optic line attenuation measurement method of any one of claims 1-5 via execution of the executable instructions.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method for measuring attenuation of an optical fiber line according to any one of claims 1 to 5.
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