CN112910548A - Method, detection instrument and system for determining ONU state - Google Patents
Method, detection instrument and system for determining ONU state Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000013307 optical fiber Substances 0.000 claims abstract description 80
- 230000003287 optical effect Effects 0.000 claims abstract description 42
- 238000012360 testing method Methods 0.000 claims abstract description 37
- 238000005259 measurement Methods 0.000 claims abstract description 16
- 238000002310 reflectometry Methods 0.000 claims description 44
- 239000000835 fiber Substances 0.000 claims description 27
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000000253 optical time-domain reflectometry Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 230000008569 process Effects 0.000 description 8
- 238000007726 management method Methods 0.000 description 5
- 238000004590 computer program Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009960 carding Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
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- 230000007723 transport mechanism Effects 0.000 description 1
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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
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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Abstract
According to the method, the detection instrument and the system for determining the ONU state, provided by the embodiment of the invention, the detection instrument is controlled to initiate an OTDR (optical time domain reflectometer) test through an application program APP (application program) detection module; analyzing a second optical signal returned from the optical fiber to be detected through the APP detection module to obtain actual measurement data of the optical fiber to be detected; obtaining target data according to the difference value of the measured data and the tooling data; and then the target data is used for determining the state of the ONU according to the preset determination logic, so that the technical effect that the state of the ONU at the opposite end of the optical fiber can be determined only by accessing the optical fiber to be tested into the detection instrument through a tool can be realized.
Description
Technical Field
The embodiment of the invention relates to the field of combing of optical fiber resources of operators, in particular to a method, a detection meter and a system for determining the state of an ONU (optical network unit).
Background
With the popularization of fiber to the sun (FTTx), Passive Optical Network (PON) network elements are widely distributed and are large in number. In the system in the related art, various elements such as an Optical Line Terminal (OLT), a PON port, an optical splitter, an Optical Network Unit (ONU) and the like can be sorted and recorded into the system; the OLT can partially identify the online and offline states of the specific ONU; however, when the ONU is not powered on, accessed, and broken during on-site combing, the OLT cannot identify the state of the ONU, so that the fiber resource combing is very difficult, and it is difficult to acquire the accurate ONU state into an information system. For this case, there are generally two options: firstly, the ONU state is comprehensively described in a similar state such as idle state or offline state; and secondly, checking the optical fiber connection condition by knocking the door to enter the house on site. The first option has the problems that the state cannot be accurately determined due to the fact that the first option is too fuzzy, resources cannot be effectively utilized, and the first option cannot be used as a reliable decision basis (such as increasing or reducing wiring, enhancing or weakening popularization strength and the like); the second option has the problems of too high carding cost, low efficiency and user disturbance.
Therefore, how to comb and manage the optical fiber resources of the operators becomes an urgent problem to be solved.
Disclosure of Invention
The method, the detection instrument and the system for determining the ONU state provided by the embodiment of the invention mainly solve the technical problems that: how to accurately measure the state of the ONU without entering the home, and provide accurate data for the operation management of an operator.
To solve the foregoing technical problem, an embodiment of the present invention provides a method for determining an ONU state, including:
controlling a detection instrument to initiate OTDR (optical time domain reflectometer) test through an application program APP (application program) detection module;
analyzing a second optical signal returned from the optical fiber to be detected through the APP detection module to obtain actual measurement data of the optical fiber to be detected; obtaining target data according to the difference value of the measured data and the tooling data; and then determining the state of the ONU according to the target data by a preset judgment logic.
In order to solve the above technical problem, an embodiment of the present invention further provides a detection instrument, including: an APP detection module; the APP detection module comprises:
the control unit is used for controlling the detection instrument to initiate OTDR (optical time domain reflectometer) test;
the analysis unit is used for analyzing a second optical signal returned from the optical fiber to be detected to obtain the actual measurement data of the optical fiber to be detected;
the calculation unit is used for obtaining target data according to the difference value of the measured data and the tooling data;
and the judging unit is used for determining the state of the ONU according to the target data by preset judging logic.
To solve the above technical problem, an embodiment of the present invention further provides a system for determining an ONU state, including:
detecting a gauge and a tool; the detection instrument is connected with a fiber coiling box in the tool; the attenuator in the tool is connected with the optical fiber to be tested;
an APP detection module on the detection instrument controls the detection instrument to initiate an OTDR test; the APP detection module analyzes a second optical signal returned from the optical fiber to be detected to obtain actual measurement data of the optical fiber to be detected; obtaining target data according to the difference value of the measured data and the tooling data; and then determining the state of the ONU according to the target data by a preset judgment logic.
The invention has the beneficial effects that:
according to the method, the detection instrument and the system for determining the ONU state, provided by the embodiment of the invention, the detection instrument is controlled to initiate an OTDR (optical time domain reflectometer) test through an application program APP (application program) detection module; analyzing a second optical signal returned from the optical fiber to be detected through the APP detection module to obtain actual measurement data of the optical fiber to be detected; obtaining target data according to the difference value of the measured data and the tooling data; and then the target data is used for determining the state of the ONU according to the preset determination logic, and in some implementation processes, the technical effect that the state of the ONU at the opposite end of the optical fiber can be determined only by accessing the optical fiber to be tested into a detection instrument through a tool can be realized.
Additional features and corresponding advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic flowchart of a method for determining an ONU status according to a first embodiment of the present invention;
fig. 2 is a flowchart illustrating a method for determining an ONU status according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of an APP detection module in a detection instrument according to a third embodiment of the present invention.
Fig. 4 is a schematic connection diagram of a system for measuring an ONU according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
To facilitate understanding of the method, the detection instrument, and the system for determining the ONU state provided in the embodiments of the present invention, a technical background of the OTDR for determining the connection state of an optical fiber to the home is first described:
OTDRs can be used to test different end face reflection sizes, and different end face reflections are different, such as:
the reflectivity of a PC type joint exposed to air is greater than-15 dB, which is the worst case for reflections;
the connection of the ONU is equivalent to the physical coupling of the end face of the optical fiber, the online reflectivity is larger than-35 dB unless the connection insertion loss is infinite, but the return loss is smaller than the open-circuit reflectivity under the condition;
the reflection return loss at the tail end of the broken fiber is based on the distribution condition of the reflectivity of the broken fiber of TR-287, the probability that the reflectivity is more than-15 dB is very small when the fiber is broken, the probability that the reflectivity is more than-35 dB is 15%, and the high probability distribution is in the range that the reflectivity is more than-60 dB.
According to the above analysis, when the ONU is not powered on, the reflectivity difference range can be used to distinguish whether the ONU is connected, and when the ONU is not connected, the ONU is opened or broken.
The first embodiment is as follows:
in order to solve the technical problem how to accurately determine the ONU status without entering the home and provide accurate data for operator operation management, an embodiment of the present invention provides a method for determining the ONU status, and please refer to fig. 1, where the method includes the following steps:
s110, controlling a detection instrument to initiate an OTDR (optical time domain reflectometer) test through an application program APP (application program) detection module;
s120, analyzing a second optical signal returned from the optical fiber to be detected through the APP detection module to obtain actual measurement data of the optical fiber to be detected;
s130, obtaining target data according to the difference value of the measured data and the tooling data;
and S140, determining the state of the ONU according to the target data according to preset judgment logic.
According to the method for determining the ONU state provided by the embodiment of the invention, the ONU state of the opposite end of the optical fiber can be determined only by accessing the optical fiber to be tested into the detection instrument through the tool, so that the aim of accurately determining the ONU state without depending on other equipment facilities such as OLT and the like or knocking the door to enter the house in the test process is fulfilled.
In some embodiments, before the analyzing, by the APP detection module, the second optical signal returned from the optical fiber to be tested to obtain measured data of the optical fiber to be tested, the method includes:
and analyzing a first optical signal returned from the tool by the APP detection module to obtain the tool data.
It should be noted that the above process is a calibration test, and the specific operation process is as follows: 1) the detection instrument, the fiber coiling box and the attenuator are sequentially connected; 2) an APP on the detection instrument controls the detection instrument to initiate an OTDR test, and sends and receives a group of optical signals; 3) and the APP analyzes the received optical signal to obtain tool data.
In some embodiments, the measured data comprises a measured reflectance and a measured length; the tool data comprises tool reflectivity and tool length; the target data includes a target reflectivity and a target length.
In some embodiments, the status of the ONU comprises: the optical fiber connector comprises a first broken fiber, a second broken fiber, a first open circuit, a second open circuit and an online.
It is understood that embodiments of the present invention can accurately determine the state of an OUN, such as unpowered, unconnected optical fibers, broken fibers, etc.
In some embodiments, the determining the status of the ONU by the target data according to the preset decision logic includes:
step one, judging whether the target length is smaller than a length threshold value, if so, determining that the state of the ONU is the first fiber breakage; otherwise, executing the step two;
step two, judging whether the target reflectivity is larger than or equal to zero, if so, determining the state of the ONU as the first open circuit; otherwise, executing the third step;
step three, judging whether the absolute value of the target reflectivity is smaller than the minimum number in a judgment interval, if so, determining that the state of the ONU is the second open circuit; otherwise, executing the step four;
step four, judging whether the absolute value of the target reflectivity is larger than the maximum number in a judgment interval or not, and if so, determining that the state of the ONU is the second fiber breakage; otherwise, determining the state of the ONU as the online state.
In some embodiments, before the controlling, by the APP detection module of the application, the detection instrument to initiate an OTDR test of an optical time domain reflectometer, the method includes:
and presetting the length threshold and the judgment interval.
It can be understood that the length threshold and the determination interval may be default values set by the system, or may be specifically set by the user according to actual conditions.
In some embodiments, the method comprises:
and displaying the measured data of the optical fiber to be detected through a parameter interface of the APP detection module.
For example, at the end of the entire test, the measured reflectance is displayed on the parameter interface of the test meter, and the display positions of the measured reflectance corresponding to different OUN states are different.
For better understanding of the method for determining the ONU state provided in the embodiment of the present invention, the following four application scenarios are provided for illustration, but the method is not limited to these application scenarios:
the application scene one: the length of the optical fiber to be measured is 100m, and the opposite end is accessed into the ONU
The procedure for in situ determination of the state of the OUN is as follows:
1) an operator arrives at a site and is sequentially connected with a detection instrument, a tool and an optical fiber to be detected;
2) an operator controls the detection instrument to initiate an OTDR test by using an APP on the detection instrument;
3) analyzing the received optical signal through the APP to obtain the actually measured reflectivity and the actually measured length of the optical fiber;
4) subtracting the recorded corresponding numerical value of the tool from the actual measurement data through the APP to obtain the target reflectivity and the target length of the optical fiber; wherein the target length is 100m, which accords with the actual situation;
5) then, calculating by APP, and distributing the absolute value of the target reflectivity, namely abs (actually measured reflectivity-tool reflectivity), in a judging interval [ dStart, dEnd ];
6) and logically judging that the ONU is on line and is consistent with the actual connection condition.
Application scenario two: the length of the optical fiber to be measured is 100m, the optical fiber head is arranged at the opposite end, but the optical fiber head is not connected to the ONU, and the optical fiber head is exposed in the air
1) An operator arrives at a site and is sequentially connected with a detection instrument, a tool and an optical fiber to be detected;
2) an operator controls the detection instrument to initiate an OTDR test by using an APP on the detection instrument;
3) analyzing the received optical signal through the APP to obtain the actually measured reflectivity and the actually measured length of the optical fiber;
4) subtracting the recorded corresponding numerical value of the tool from the actual measurement data through the APP to obtain the target reflectivity and the target length of the optical fiber; wherein the target length is 100m, which accords with the actual situation;
5) calculating by APP, wherein the actually measured reflectivity is larger than the tool reflectivity;
6) and logically judging the connection to be an open circuit, and matching with the actual connection condition.
Application scenario three: the length of the optical fiber to be measured is 120m, the optical fiber head is arranged at the opposite end, but the optical fiber head is not connected to the ONU, and the optical fiber head is exposed in the air
1) An operator arrives at a site and is sequentially connected with a detection instrument, a tool and an optical fiber to be detected;
2) an operator controls the detection instrument to initiate an OTDR test by using an APP on the detection instrument;
3) analyzing the received optical signal through the APP to obtain the actually measured reflectivity and the actually measured length of the optical fiber;
4) subtracting the recorded corresponding numerical value of the tool from the actual measurement data through the APP to obtain the target reflectivity and the target length of the optical fiber; wherein, the target length is 120m, which accords with the actual situation;
5) then, calculating by APP, wherein the absolute value of the target reflectivity, namely abs (actually measured reflectivity-tool reflectivity), is smaller than dStart;
6) and logically judging the connection to be an open circuit, and matching with the actual connection condition.
And an application scene four: the length of the optical fiber to be measured is 120m, and the opposite end has no optical fiber head
1) An operator arrives at a site and is sequentially connected with a detection instrument, a tool and an optical fiber to be detected;
2) an operator controls the detection instrument to initiate an OTDR test by using an APP on the detection instrument;
3) analyzing the received optical signal through the APP to obtain the actually measured reflectivity and the actually measured length of the optical fiber;
4) subtracting the recorded corresponding numerical value of the tool from the actual measurement data through the APP to obtain the target reflectivity and the target length of the optical fiber; wherein, the target length is 120m, which accords with the actual situation;
5) then, calculating by APP, wherein the absolute value of the target reflectivity, namely abs (actually measured reflectivity-tool reflectivity), is larger than dEnd;
6) and logically judging the fiber to be broken, and matching with the actual connection condition.
The method for determining the ONU state provided by the embodiment of the invention can realize the technical effect that the ONU state of the opposite end of the optical fiber can be determined only by accessing the optical fiber to be tested into the detection instrument through a tool, but not limited to the technical effect.
Example two:
in order to solve the technical problem how to accurately determine the state of an ONU without entering a home and provide accurate data for operator operation management, an embodiment of the present invention provides a method for determining the state of an ONU, where the method includes the following steps:
1) configuring a threshold value
And presetting a length threshold and a judgment interval.
2) Calibration test (please see FIG. 2)
S200, the APP controls the detection instrument to initiate an OTDR test;
s201, the APP analyzes the received optical signal to obtain tool data.
3) Testing in the field (please see FIG. 2)
S202, the APP controls the detection instrument to initiate an OTDR test;
s203, the APP analyzes the received optical signal to obtain measured data;
s204, subtracting the recorded corresponding numerical value of the tool by the APP according to the measured data to obtain the target reflectivity and the target length of the optical fiber;
s205, judging whether the target length is smaller than a length threshold value, if so, executing S206; otherwise, executing S207;
s206, determining the state of the ONU as the first fiber breakage;
s207, judging whether the target reflectivity is larger than or equal to zero, if so, executing S208; otherwise, executing S209;
s208, determining that the state of the ONU is a first open circuit;
s209, judging whether the absolute value of the target reflectivity is smaller than the minimum number in the judgment interval; if yes, go to S210; otherwise, executing S211;
s210, determining that the state of the ONU is a second open circuit;
s211, judging whether the absolute value of the target reflectivity is larger than the maximum number in the judgment section; if yes, go to step S212; otherwise, go to S213;
s212, determining that the state of the ONU is the second fiber breakage;
s213, determining the state of the ONU to be online.
And S214, completing ONU state measurement.
The method for determining the ONU state provided by the embodiment of the invention can realize the technical effect that the ONU state of the opposite end of the optical fiber can be determined only by accessing the optical fiber to be tested into the detection instrument through a tool, but not limited to the technical effect.
Example three:
in order to solve the technical problem how to accurately determine the state of an ONU without entering a home and provide accurate data for operator operation management, an embodiment of the present invention provides a detection instrument, as shown in fig. 3, the detection instrument includes an APP detection module 300; the APP detection module 300 includes:
a control unit 310, configured to control the detection instrument to initiate an OTDR test of an optical time domain reflectometer;
the analyzing unit 320 is configured to analyze the second optical signal returned from the optical fiber to be measured, and obtain actual measurement data of the optical fiber to be measured;
the calculating unit 330 is configured to obtain target data according to a difference between the measured data and the tool data;
and the judging unit 340 is configured to determine the state of the ONU according to the target data by preset judgment logic.
The detection instrument provided by the embodiment of the invention achieves the purpose of accurately measuring the state of the ONU in the test process without depending on other equipment facilities such as OLT and the like or knocking the door to enter the house.
In some embodiments, the analyzing unit is further configured to analyze the first optical signal returned from the tool to obtain the tool data.
It should be noted that the above process is a calibration test, and the specific operation process is as follows: 1) the detection instrument, the fiber coiling box and the attenuator are sequentially connected; 2) an APP on the detection instrument controls the detection instrument to initiate an OTDR test, and sends and receives a group of optical signals; 3) and the APP analyzes the received optical signal to obtain tool data.
In some embodiments, the measured data comprises a measured reflectance and a measured length; the tool data comprises tool reflectivity and tool length; the target data includes a target reflectivity and a target length.
In some embodiments, the status of the ONU comprises: the optical fiber connector comprises a first broken fiber, a second broken fiber, a first open circuit, a second open circuit and an online.
It is understood that embodiments of the present invention can accurately determine the state of an OUN, such as unpowered, unconnected optical fibers, broken fibers, etc.
In some embodiments, the determining the status of the ONU by the target data according to the preset decision logic includes:
step one, judging whether the target length is smaller than a length threshold value, if so, determining that the state of the ONU is the first fiber breakage; otherwise, executing the step two;
step two, judging whether the target reflectivity is larger than or equal to zero, if so, determining the state of the ONU as the first open circuit; otherwise, executing the third step;
step three, judging whether the absolute value of the target reflectivity is smaller than the minimum number in a judgment interval, if so, determining that the state of the ONU is the second open circuit; otherwise, executing the step four;
step four, judging whether the absolute value of the target reflectivity is larger than the maximum number in a judgment interval or not, and if so, determining that the state of the ONU is the second fiber breakage; otherwise, determining the state of the ONU as the online state.
In some embodiments, the length threshold and the decision interval are pre-stored in the system of the meter. Secondly, the user can flexibly modify the length threshold value and the judgment interval.
In some embodiments, the parameter interface of the APP detection module 300 may display measured data of the optical fiber to be detected. For example, at the end of the entire test, the measured reflectance is displayed on the parameter interface of the test meter, and the display positions of the measured reflectance corresponding to different OUN states are different.
The technical effect that the state of the ONU at the opposite end of the optical fiber can be judged only by accessing the optical fiber to be tested into the detection instrument through a tool can be realized by the detection instrument provided by the embodiment of the invention, and the purpose of accurately measuring the state of the ONU without depending on other equipment facilities such as OLT and the like or knocking the door to the home in the test process is achieved by the scheme provided by the embodiment of the invention.
Example four:
in order to solve the technical problem how to accurately measure the ONU status without entering the home and provide accurate data for operator operation management, an embodiment of the present invention provides a system for measuring the ONU status, as shown in fig. 4, where the system includes:
a detection instrument 410 and a tool 420; the detection instrument 410 is connected with a fiber coiling box 421 in the tool 420; an attenuator 422 in the tool 420 is connected with an optical fiber 430 to be tested;
an APP detection module on the detection instrument 410 controls the detection instrument 410 to initiate an OTDR test; the APP detection module analyzes a second optical signal returned from the optical fiber 430 to be detected to obtain actual measurement data of the optical fiber 430 to be detected; obtaining target data according to the difference value of the measured data and the tooling data; and then determining the state of the ONU according to the target data by a preset judgment logic.
In an embodiment of the present invention, the meter 410 may be any one of the meters provided in the third embodiment.
The system for determining the ONU state provided by the embodiment of the invention can realize the technical effect that the ONU state of the opposite end of the optical fiber can be determined only by accessing the optical fiber to be tested into the detection instrument through a tool, but not limited to the technical effect.
It will be apparent to those skilled in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software (which may be implemented in computer program code executable by a computing device), firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit.
In addition, communication media typically embodies computer readable instructions, data structures, computer program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to one of ordinary skill in the art. Thus, the present invention is not limited to any specific combination of hardware and software.
The foregoing is a more detailed description of embodiments of the present invention, and the present invention is not to be considered limited to such descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A method of determining an ONU state of an optical network unit, comprising:
controlling a detection instrument to initiate OTDR (optical time domain reflectometer) test through an application program APP (application program) detection module;
analyzing a second optical signal returned from the optical fiber to be detected through the APP detection module to obtain actual measurement data of the optical fiber to be detected; obtaining target data according to the difference value of the measured data and the tooling data; and then determining the state of the ONU according to the target data by a preset judgment logic.
2. The method for determining the status of an ONU according to claim 1, wherein before analyzing the second optical signal returned from the optical fiber under test by the APP detection module to obtain the measured data of the optical fiber under test, the method comprises:
and analyzing a first optical signal returned from the tool by the APP detection module to obtain the tool data.
3. The method of determining the status of an ONU according to claim 2, wherein said measured data comprises a measured reflectivity and a measured length; the tool data comprises tool reflectivity and tool length; the target data includes a target reflectivity and a target length.
4. A method of determining the status of an ONU according to any of claims 1 to 3, wherein the status of the ONU comprises: the optical fiber connector comprises a first broken fiber, a second broken fiber, a first open circuit, a second open circuit and an online.
5. The method for determining the status of an ONU according to claim 4, wherein said determining the status of the ONU with the target data according to a preset decision logic comprises the steps of:
step one, judging whether the target length is smaller than a length threshold value, if so, determining that the state of the ONU is the first fiber breakage; otherwise, executing the step two;
step two, judging whether the target reflectivity is larger than or equal to zero, if so, determining the state of the ONU as the first open circuit; otherwise, executing the third step;
step three, judging whether the absolute value of the target reflectivity is smaller than the minimum number in a judgment interval, if so, determining that the state of the ONU is the second open circuit; otherwise, executing the step four;
step four, judging whether the absolute value of the target reflectivity is larger than the maximum number in a judgment interval or not, and if so, determining that the state of the ONU is the second fiber breakage; otherwise, determining the state of the ONU as the online state.
6. The method of determining the status of an ONU according to claim 5, before said controlling the instrumentation by the application APP detection module to initiate the optical time domain reflectometry OTDR test, comprising:
and presetting the length threshold and the judgment interval.
7. The method of determining the status of an ONU according to claim 6, characterized in that it comprises:
and displaying the measured data of the optical fiber to be detected through a parameter interface of the APP detection module.
8. A test meter, comprising: an APP detection module; the APP detection module comprises:
the control unit is used for controlling the detection instrument to initiate OTDR (optical time domain reflectometer) test;
the analysis unit is used for analyzing a second optical signal returned from the optical fiber to be detected to obtain the actual measurement data of the optical fiber to be detected;
the calculation unit is used for obtaining target data according to the difference value of the measured data and the tooling data;
and the judging unit is used for determining the state of the ONU according to the target data by preset judging logic.
9. A test meter according to claim 8,
the analysis unit is further used for analyzing the first optical signal returned from the tool to obtain the tool data.
10. A system for determining the status of an ONU, comprising:
detecting a gauge and a tool; the detection instrument is connected with a fiber coiling box in the tool; the attenuator in the tool is connected with the optical fiber to be tested;
an APP detection module on the detection instrument controls the detection instrument to initiate an OTDR test; the APP detection module analyzes a second optical signal returned from the optical fiber to be detected to obtain actual measurement data of the optical fiber to be detected; obtaining target data according to the difference value of the measured data and the tooling data; and then determining the state of the ONU according to the target data by a preset judgment logic.
Priority Applications (1)
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