CN103281122B - A kind of optical cable on-line monitoring improves the method for alarm accuracy rate - Google Patents
A kind of optical cable on-line monitoring improves the method for alarm accuracy rate Download PDFInfo
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- 230000003287 optical effect Effects 0.000 title claims abstract description 100
- 238000012544 monitoring process Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000835 fiber Substances 0.000 claims abstract description 29
- 238000012360 testing method Methods 0.000 claims description 43
- 239000013307 optical fiber Substances 0.000 claims description 11
- 238000009825 accumulation Methods 0.000 claims description 3
- 230000005856 abnormality Effects 0.000 description 2
- 238000000253 optical time-domain reflectometry Methods 0.000 description 2
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Abstract
The invention discloses a kind of method that optical cable on-line monitoring improves alarm accuracy rate, operation control terminal interior focusing time-domain reflectomer detect lossy data judges whether to exceed alarming threshold value successively, whether alarm place is in joint and whether in the acceptable exhaustion range of joint, with the same fiber cores continuous alarm number of times of optical cable, whether exceed continuous alarm frequency threshold value, the present invention effectively can improve optical cable on-line monitoring alarm accuracy rate, reduces system no alarm that manual operation causes, in short-term or instantaneous mistake alarm.
Description
Technical field
The present invention relates to fiber optic cable monitor method, particularly relate to a kind of method that optical cable on-line monitoring improves alarm accuracy rate.
Background technology
The cable loss testing apparatus of prior art, when carrying out loss monitoring to optical cable, usually within the cycle of setting, loss test is carried out to all optical cables of monitoring, control terminal reads optical time domain reflectometer (Optical Time Domain Reflectometer, OTDR) lossy data measured, the concurrent cloth alarm of recording events when lossy data exceeds fixed threshold.The loss monitoring method of prior art has following defects: (1) is only fixed as 1dB due to system default alarm threshold, and the system alarm by mistake that manual operation causes easily occurs; (2) namely regard as alarm generation because a data exception only occurs system during surveying, therefore easily occur in short-term or instantaneous alarm by mistake; (3) in OTDR measured curve easily there is alarm by mistake in more original fixed loss points; The loss value of fixing case point easily fluctuates.
Summary of the invention
The invention provides a kind of method that optical cable on-line monitoring improves alarm accuracy rate, effectively can improve the alarm accuracy rate of optical cable on-line monitoring, reduce system no alarm that manual operation causes, in short-term or instantaneous mistake alarm.
The present invention adopts following technical scheme to realize:
Optical cable on-line monitoring improves a method for alarm accuracy rate, for above-mentioned optical cable on-Line Monitor Device, wherein comprises following steps:
Step 1, presets the loss alarming threshold value of each optical cable to be measured, each joint and acceptable loss threshold value thereof, continuously alarm frequency threshold value in operation control terminal;
Step 2, setting test period, optical time domain reflectometer carries out loss test to each fiber cores of the optical cable each to be measured of monitoring successively;
Step 3, operation control terminal reads the lossy data that optical time domain reflectometer tests every root fiber cores of the every root optical cable to be measured obtained in real time;
Step 4, operation control terminal judges whether lossy data exceeds alarming threshold, the loss alarming threshold value that the lossy data of every root fiber cores of the every root optical cable to be measured read and step 1 set is contrasted, if lossy data is greater than loss alarming threshold value, thinks and alarm event may occur, proceed step 5, otherwise return step 2 and continue to carry out loss test to next root optical fiber cables fibre core to be measured;
Step 5, operation control terminal judges whether alarm event is in joint and whether lossy data meets the acceptable loss threshold range of joint, if alarm event is in joint and lossy data is less than the acceptable loss threshold value of this joint, then return step 2 to continue to carry out loss test to next root optical fiber cables fibre core to be measured, otherwise carry out step 6;
Step 6, the continuous alarm of operation control terminal to same fiber cores of same optical cable to be measured counts, and the continuous alarm frequency threshold value this enumeration data and step 1 set contrasts, if enumeration data is greater than continuous alarm frequency threshold value, think that real alarm event carry out step 7, otherwise think that alarm by mistake returns the lossy data that step 3 continues to read optical time domain reflectometer test;
Step 7, operation control terminal carries out record to the event that step 8 enumeration data is greater than continuous alarm frequency threshold value, and outwards alarm.
Above-mentioned optical cable on-line monitoring improves the method for alarm accuracy rate, and wherein said step 1 also comprises following steps:
Step 1.1, according to specification, the behaviour in service of each optical cable to be measured, presets the loss alarming threshold value of every root optical cable to be measured;
Step 1.2, according to the actual joint situation of each optical cable, presets each joint and the acceptable loss threshold value of each joint of every root optical cable to be measured;
Step 1.3, what recur alarm according to the how many times of the accumulation of relevant staff may be just the working experience of true alarm, presets continuous alarm frequency threshold value.
Above-mentioned optical cable on-line monitoring improves the method for alarm accuracy rate, and wherein said step 2 also comprises following steps:
Step 2.1, setting test period, within the cycle of setting, optical time domain reflectometer carries out loss test to each fiber cores in the optical cable each to be measured of monitoring successively;
Step 2.2, judges whether complete the test of each optical cable to be measured in current period, if terminated the traversal test of each optical cable to be measured, enters wait state, until next test period starts.
Above-mentioned optical cable on-line monitoring improves the method for alarm accuracy rate, and wherein said step 5 also comprises following steps:
Step 5.1, judges if alarm event is in joint, to proceed step 5.2 in the joint whether alarm event is in step 1 and presets;
Step 5.2, the acceptable loss threshold value of the corresponding joint lossy data read and step 1 set contrasts, if lossy data is greater than the acceptable loss threshold value of joint, proceed step 6, otherwise return step 2 and continue to carry out loss test to next root optical fiber cables fibre core to be measured.
Above-mentioned optical cable on-line monitoring improves the method for alarm accuracy rate, and it is characterized in that, described step 7 also comprises following steps:
Step 7.1, the time that optical cable numbering to be measured corresponding for alarm event and fiber cores numbering, alarm event occur by operation control terminal, the position of maximum loss, the lossy data of test, alarm counting how many times data are recorded in database;
Step 7.2, from the monitoring station residing for operation control terminal, sends a warning message to Surveillance center step by step.
The present invention has following good effect:
The present invention owing to setting alarming threshold value in advance according to the actual conditions of monitored optical cable in operation control terminal, and therefore the present invention effectively can control the system alarm by mistake that manual operation causes;
The present invention is owing to having preset each joint and the acceptable loss threshold value of each joint, continuously alarm frequency threshold value, in observation process, whether be in joint to the lossy data exceeding alarming threshold value, whether meet the judgement that joint can accept exhaustion range, whether continuous alarm number of times exceedes continuous alarm frequency threshold value, therefore the present invention can reduce in short-term or the instantaneous generation missing alarm further;
Fixing case points that the present invention, due to some on the damage curve that obtains optical time domain reflectometer, fluctuation easily occurs set, thus ignore all abnormality alarming signals (except optical fiber interrupts) sent by this case point, therefore The present invention reduces fixed loss point on optical time domain reflectometer test curve and to fluctuate the no alarm produced; Therefore the present invention effectively can improve optical cable on-line monitoring alarm accuracy rate.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of optical cable on-Line Monitor Device of the present invention;
Fig. 2 is the method flow diagram that a kind of optical cable on-line checkingi of the present invention improves alarm accuracy rate.
Embodiment
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.
As shown in Figure 1, a kind of optical cable on-Line Monitor Device of the present invention, comprise arbitrary source 1, the first Optical Distribution Frame 2 be disposed adjacent with arbitrary source 1, second Optical Distribution Frame 3, be arranged on many optical cables 4 to be measured between the first Optical Distribution Frame 2 and the second Optical Distribution Frame 3, multiple Wavelength division multiplexing modules (the Wavelength Division Multiplexing be connected with the second Optical Distribution Frame 3, WDM) 5, each Wavelength division multiplexing module 5 respectively with luminous power module 6, optical switch module 7 connects, and multiple Wavelength division multiplexing module 5 is connected with a luminous power module 6, multiple Wavelength division multiplexing module 5 is connected with an optical switch module 7, luminous power module 6 is connected with operation control terminal 8, optical switch module 7 is connected with optical time domain reflectometer 9, operation control terminal 8 is connected with optical time domain reflectometer 9.Wherein every root optical cable 4 to be measured comprises multifiber core.By the optical cable that optical switch module 7 switching controls optical time domain reflectometer 9 detects.
As shown in Figure 2, a kind of optical cable on-line monitoring of the present invention improves the method for alarm accuracy rate, for above-mentioned optical cable on-Line Monitor Device, comprises following steps:
Step 1, presets the loss alarming threshold value of each optical cable to be measured, each joint and acceptable loss threshold value thereof, continuously alarm frequency threshold value in operation control terminal 8.This step specifically comprises:
Step 1.1, according to specification, the behaviour in service of each optical cable to be measured, presets the loss alarming threshold value of every root optical cable to be measured.
Step 1.2, according to the actual joint situation of each optical cable, presets each joint and the acceptable loss threshold value of each joint of every root optical cable to be measured.
Step 1.3, what recur alarm according to the how many times of the accumulation of relevant staff may be just the working experience of true alarm, presets continuous alarm frequency threshold value.
Step 2, setting test period, optical time domain reflectometer 9 carries out loss test to each fiber cores of the optical cable 4 each to be measured of monitoring successively.This step specifically comprises:
Step 2.1, setting test period, within the cycle of setting, optical time domain reflectometer 9 carries out loss test to each fiber cores in the optical cable 4 each to be measured of monitoring successively.
Step 2.2, judges whether complete the test of each optical cable 4 to be measured in current period, if terminated the traversal test of each optical cable 4 to be measured, enters wait state, until next test period starts.
Step 3, operation control terminal 8 reads the lossy data that optical time domain reflectometer 9 tests every root fiber cores of the every root optical cable to be measured 4 obtained in real time.
Step 4, operation control terminal 8 judges whether lossy data exceeds alarming threshold, the loss alarming threshold value that the lossy data of every root fiber cores of the every root optical cable to be measured 4 read and step 1 set is contrasted, if lossy data is greater than loss alarming threshold value, thinks and alarm event may occur, proceed step 5, otherwise return step 2 and continue to carry out loss test to next root optical fiber cables fibre core to be measured.
Step 5, operation control terminal 8 judges whether alarm event is in joint and whether lossy data meets the acceptable loss threshold range of joint, if alarm event is in joint and lossy data is less than the acceptable loss threshold value of this joint, then return step 2 to continue to carry out loss test to next root optical fiber cables fibre core to be measured, otherwise carry out step 6.This step specifically comprises:
Step 5.1, judges if alarm event is in joint, to proceed step 5.2 in the joint whether alarm event is in step 1 and presets.
Step 5.2, the acceptable loss threshold value of the corresponding joint lossy data read and step 1 set contrasts, if lossy data is greater than the acceptable loss threshold value of joint, proceed step 6, otherwise return step 2 and continue to carry out loss test to next root optical fiber cables fibre core to be measured.
Step 6, the continuous alarm of operation control terminal 8 to same fiber cores of same optical cable to be measured counts, and the continuous alarm frequency threshold value this enumeration data and step 1 set contrasts, if enumeration data is greater than continuous alarm frequency threshold value, think that real alarm event carry out step 7, otherwise think that alarm by mistake returns the lossy data that step 3 continues to read optical time domain reflectometer test.
Step 7, the event that operation control terminal 8 pairs of step 8 enumeration datas are greater than continuous alarm frequency threshold value carries out record, and outwards alarm.This step specifically comprises:
Step 7.1, the time that optical cable numbering to be measured corresponding for alarm event and fiber cores numbering, alarm event occur by operation control terminal 8, the position of maximum loss, the lossy data of test, alarm counting how many times data are recorded in database.
Step 7.2, from the monitoring station residing for operation control terminal 8, sends a warning message to Surveillance center step by step.
In sum, the present invention owing to setting alarming threshold value in advance according to the actual conditions of monitored optical cable in operation control terminal, and therefore the present invention effectively can control the system alarm by mistake that manual operation causes; The present invention is owing to having preset each joint and the acceptable loss threshold value of each joint, continuously alarm frequency threshold value, in observation process, whether be in joint to the lossy data exceeding alarming threshold value, whether meet the judgement that joint can accept exhaustion range, whether continuous alarm number of times exceedes continuous alarm frequency threshold value, therefore the present invention can reduce in short-term or the instantaneous generation missing alarm further; Fixing case points that the present invention, due to some on the damage curve that obtains optical time domain reflectometer, fluctuation easily occurs set, thus ignore all abnormality alarming signals (except optical fiber interrupts) sent by this case point, therefore The present invention reduces fixed loss point on optical time domain reflectometer test curve and to fluctuate the no alarm produced; Therefore the present invention effectively can improve optical cable on-line monitoring alarm accuracy rate.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (3)
1. optical cable on-line monitoring improves a method for alarm accuracy rate, for optical cable on-Line Monitor Device, it is characterized in that, comprises following steps:
Step 1, in operation control terminal (8), according to specification, the behaviour in service of each optical cable to be measured, presets the loss alarming threshold value of every root optical cable to be measured; According to the actual joint situation of each optical cable, preset each joint and the acceptable loss threshold value of each joint of every root optical cable to be measured; What recur alarm according to the how many times of the accumulation of relevant staff may be just the working experience of true alarm, presets continuous alarm frequency threshold value;
Step 2, setting test period, optical time domain reflectometer (9) carries out loss test to each fiber cores of the optical cable each to be measured (4) of monitoring successively;
Step 3, the lossy data that optical time domain reflectometer (9) tests every root fiber cores of the every root optical cable to be measured (4) obtained is read in operation control terminal (8) in real time;
Step 4, operation control terminal (8) judges whether lossy data exceeds alarming threshold, the loss alarming threshold value that the lossy data of every root fiber cores of the every root optical cable to be measured (4) read and step 1 set is contrasted, if lossy data is greater than loss alarming threshold value, thinks and alarm event may occur, proceed step 5, otherwise return step 2 and continue to carry out loss test to next root optical fiber cables fibre core to be measured;
Step 5, operation control terminal (8) judges whether alarm event is in joint and whether lossy data meets the acceptable loss threshold range of joint, if alarm event is in joint and lossy data is less than the acceptable loss threshold value of this joint, then return step 2 to continue to carry out loss test to next root optical fiber cables fibre core to be measured, otherwise carry out step 6;
Step 6, operation control terminal (8) the continuous alarm to same fiber cores of same optical cable to be measured counts, and the continuous alarm frequency threshold value this enumeration data and step 1 set contrasts, if enumeration data is greater than continuous alarm frequency threshold value, think that real alarm event carry out step 7, otherwise think that alarm by mistake returns the lossy data that step 3 continues to read optical time domain reflectometer test;
Step 7, the time that optical cable numbering to be measured corresponding for alarm event and fiber cores numbering, alarm event occur by operation control terminal (8), the position of maximum loss, the lossy data of test, alarm counting how many times data are recorded in database; From the monitoring station residing for operation control terminal (8), send a warning message to Surveillance center step by step.
2. optical cable on-line monitoring as claimed in claim 1 improves the method for alarm accuracy rate, and it is characterized in that, described step 2 also comprises following steps:
Step 2.1, setting test period, within the cycle of setting, optical time domain reflectometer (9) carries out loss test to each fiber cores in the optical cable each to be measured (4) of monitoring successively;
Step 2.2, judges whether complete the test of each optical cable to be measured (4) in current period, if terminated the traversal test of each optical cable to be measured (4), enters wait state, until next test period starts.
3. optical cable on-line monitoring as claimed in claim 1 improves the method for alarm accuracy rate, and it is characterized in that, described step 5 also comprises following steps:
Step 5.1, judges if alarm event is in joint, to proceed step 5.2 in the joint whether alarm event is in step 1 and presets;
Step 5.2, the acceptable loss threshold value of the corresponding joint lossy data read and step 1 set contrasts, if lossy data is greater than the acceptable loss threshold value of joint, proceed step 6, otherwise return step 2 and continue to carry out loss test to next root optical fiber cables fibre core to be measured.
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| TWI608705B (en) * | 2015-12-29 | 2017-12-11 | Chunghwa Telecom Co Ltd | Use of transmission network to alarm optical cable abnormality and its computer program product |
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| CN111901034B (en) * | 2020-06-05 | 2022-07-12 | 国网江苏省电力有限公司南京供电分公司 | Real-time optical cable situation monitoring system |
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