CN110514413A - A kind of disconnected fine rapid detection method of fiber fence and system - Google Patents
A kind of disconnected fine rapid detection method of fiber fence and system Download PDFInfo
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- CN110514413A CN110514413A CN201810497436.4A CN201810497436A CN110514413A CN 110514413 A CN110514413 A CN 110514413A CN 201810497436 A CN201810497436 A CN 201810497436A CN 110514413 A CN110514413 A CN 110514413A
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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
- G01M11/08—Testing mechanical properties
- G01M11/088—Testing mechanical properties of optical fibres; Mechanical features associated with the optical testing of optical fibres
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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
- H04B10/073—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an out-of-service signal
- H04B10/0731—Testing or characterisation of optical devices, e.g. amplifiers
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Abstract
The invention discloses a kind of disconnected fine rapid detection methods of fiber fence, are related to optical fiber on-off detection technique field, solve the problems, such as the prior art interrupt the existing alarm erroneous judgement of fine detection, be delayed it is excessive.This method comprises: generating the first optical signal and being coupled with the third optical signal of the second optical signal；First optical signal is coupled to the 4th optical signal of output with the third optical signal for being coupled with the second optical signal；Judge the whether disconnected fibre of optical fiber, if the value of the 4th optical signal is greater than zero, judges the not disconnected fibre of optical fiber, if the value of the 4th optical signal is equal to zero, judge the disconnected fibre of optical fiber.
Description
Technical field
The present invention relates to optical fiber on-off detection technique field, in particular to the disconnected fine rapid detection method of a kind of fiber fence and
System.
Background technique
In fiber fence guard system, if the optical cable in guard plot is cut, guard system entire in this way cannot be just
Often work, so the detection of disconnected fine alarm is an essential Xiang Gongneng for system.Detecting the disconnected fine foundation alerted at present is
After optical cable disconnects in defence area, the signal that equipment receives can be long-term at a low ebb.But when environment is especially quiet, equipment is normal
The signal received also has at a low ebb for a long time.So in the disconnected fine alarm of report in order to continue to this low frequency signal when
Between very long normal operating conditions carry out excluding detection must be broken fine time window set it is especially long, exist alarm erroneous judgement,
Be delayed excessive problem.
Fig. 1 is the disconnected fine detection system block diagram of fiber fence in the prior art, in conjunction with Fig. 1, the fiber fence of the prior art
Broken fiber detecting method are as follows: 1 laser generation wavelength of λ is the first optical signal of λ 1, is divided score by 1:1 by the first optical splitter
At identical first optical signal of two-way, coupled by the second optical combiner by 1:1 light combination ratio in the terminal of two ways of optical signals,
The 5th optical signal is formed, the 5th optical signal is converted to by the 5th electric signal by photoelectric conversion module, it will be faint by amplifier
The 5th electric signal amplify, the 5th electric signal is analyzed and processed by judging module, the whether disconnected fibre of optical fiber is judged, if institute
The value for stating the 5th electric signal is greater than zero, then judges that the not disconnected fibre of optical fiber judges optical fiber if the value of the 5th electric signal is equal to zero
Disconnected fibre.
But when environment is especially quiet, the 5th electric signal that the system of the prior art normally receives also has very long
Time is at a low ebb.So in the disconnected fine alarm of report in order to this low frequency signal (close to zero) duration very long normal
Working condition carries out excluding the disconnected fine time window of detection must be set especially long.It is generated in conjunction with the system of Fig. 2 prior art
Normal interference waveform and disconnected fine waveform, tg is time window, is greater than time window when the 5th electric signal time at a low ebb
When, it will result in erroneous judgement, and disconnected fine alarm will can be just generated after this period of time window after disconnected fibre, to make
At delay.Within the system to reduce erroneous judgement it is necessary to increase time window, and to reduce and be delayed it is necessary to reduce time window,
This generates contradictions.
Summary of the invention
The object of the present invention is to provide a kind of disconnected fine rapid detection method of fiber fence and systems, and which solve the prior arts
The problem of disconnected fine detection erroneous judgement of middle fiber fence, alarm delay.
In a first aspect, the embodiment provides a kind of disconnected fine rapid detection method of fiber fence, the method packet
Include: generating the first optical signal and be coupled with the third optical signal of the second optical signal；By the first optical signal and it is coupled with the second light letter
Number third optical signal coupling output the 4th optical signal；Judge the whether disconnected fibre of optical fiber, if the value of the 4th optical signal is greater than zero,
Then judge the not disconnected fibre of optical fiber, if the value of the 4th optical signal is equal to zero, judges the disconnected fibre of optical fiber.
With reference to first aspect, in the first possible implementation, the first optical signal of the generation and it is coupled with second
The method of the third optical signal of optical signal are as follows: generate the first optical signal；First optical signal is divided into identical two by 1:1 splitting ratio
The first optical signal of road；Will wherein all the way the first optical signal couple the second optical signal form the third optical signal.
With reference to first aspect, in the second possible implementation, the first optical signal of the generation and it is coupled with second
The method of the third optical signal of optical signal are as follows: generate the first optical signal；First optical signal is coupled to form with the second optical signal
Three optical signals；Third optical signal is formed into the identical third optical signal of two-way by 1:1 splitting ratio branch；It will wherein third light all the way
First optical signal of signal coupling and the separation of the second optical signal, abandon the second optical signal, retain the first optical signal.
With reference to first aspect, alternatively, the first implementation with reference to first aspect, alternatively, with reference to first aspect
Two kinds of implementations, 1 laser of the first optical signals λ generate, and 2 laser of the second optical signals λ generates.
With reference to first aspect, alternatively, the first implementation with reference to first aspect, alternatively, with reference to first aspect
Two kinds of implementations, in it is described judge whether optical fiber disconnected fine before, convert the 4th electric signal for the 4th optical signal, and will
The amplification of 4th electric signal.
Second aspect, the embodiment of the invention provides a kind of disconnected fine rapid detection systems of fiber fence, comprising: 1 laser of λ
Device, the optical signal for being λ 1 for generation wavelength；2 laser of λ, the optical signal for being λ 2 for generation wavelength；First optical splitter, with
1 laser of λ, for the first optical signal to be divided into identical first optical signal of two-way by 1:1 splitting ratio；Two multiply two couplings
Device, for coupling to form third optical signal the second optical signal with first optical signal；Second optical combiner, for receiving the
One optical signal and third optical signal, and the first optical signal and third optical signal are coupled by 1:1 light combination ratio, form the 4th light
Signal；Optical detector is connect with second optical combiner, for receiving the 4th optical signal；Photoelectric conversion module, with institute
Optical detector connection is stated, for converting the 4th electric signal for the 4th optical signal；Amplifier connects with the photoelectric conversion module
It connects, for amplifying the 4th electric signal；Judging module is connect with the amplifier, for judging the whether disconnected fibre of optical fiber, if
The value of amplified 4th electric signal is greater than zero, then judges the not disconnected fibre of optical fiber, if amplified 4th electric signal
Value is equal to zero, then judges the disconnected fibre of optical fiber.
The third aspect, the embodiment of the invention provides a kind of disconnected fine rapid detection systems of fiber fence, comprising: 1 laser of λ
Device, the optical signal for being λ 1 for generation wavelength；2 laser of λ, the optical signal for being λ 2 for generation wavelength；Photo-coupler, input
End is connect with 1 laser of λ and 2 laser of λ, for coupling the first optical signal with the second optical signal, forms third
Optical signal；First optical splitter is connect with the output end of the photo-coupler, for third optical signal to be divided score by 1:1
For the identical third optical signal of two-way；Channel-splitting filter is connect with first optical splitter, for will wherein third optical signal all the way
First optical signal of middle coupling and the separation of the second optical signal, abandon the second optical signal, retain the first optical signal；Second photosynthetic road
Device carries out coupling by 1:1 light combination ratio for receiving the first optical signal and third optical signal, and by the first optical signal and third optical signal
It closes, forms the 4th optical signal；Optical detector is connect with second optical combiner, for receiving the 4th optical signal；Photoelectricity
Conversion module is surveyed with the light prober and is connected, for converting the 4th electric signal for the 4th optical signal；Amplifier, with the light
Electric conversion module connection, for amplifying the 4th electric signal；Judging module is connect, for judging light with the amplifier
It is fine whether disconnected fine, if the value of amplified 4th electric signal is greater than zero, the not disconnected fibre of optical fiber is judged, if amplified described
The value of 4th electric signal is equal to zero, then judges the disconnected fibre of optical fiber.
In conclusion the invention has the following advantages: in normal work, due to being coupled in the 4th optical signal
The value perseverance of second optical signal, the 4th optical signal is greater than zero.But after disconnected fibre, the value of the 4th optical signal is zero, thus very
It significantly distinguishes and resolves the fine moment, can accurately provide alarm real-time, quickly.In addition in engineering construction, optical cable is occupied
Core number is constant, without overhead.Increased costs are less after commercialization.
Detailed description of the invention
Fig. 1 is the disconnected fine detection system block diagram of fiber fence in the prior art；
Fig. 2 is the normal interference waveform and disconnected fine waveform that the disconnected fine detection system of fiber fence in the prior art generates；
Fig. 3 is a kind of flow diagram of the disconnected fine rapid detection method of fiber fence provided in an embodiment of the present invention；
Fig. 4 is a kind of third optical signal for generating the first optical signal and being coupled with the second optical signal provided in an embodiment of the present invention
Flow diagram；
Fig. 5 is another third optical signal for generating the first optical signal and being coupled with the second optical signal provided in an embodiment of the present invention
Flow diagram；
Fig. 6 is a kind of optical fiber of the method based on a kind of the first optical signal of generation and the third optical signal for being coupled with the second optical signal
The disconnected fine rapid detection system block diagram of fence；
Fig. 7 is the another kind of the method based on another third optical signal for generating the first optical signal and being coupled with the second optical signal
The disconnected fine rapid detection system block diagram of fiber fence；
Fig. 8 is the normal interference waveform and disconnected fine waveform that the disconnected fine rapid detection system of the fiber fence of the embodiment of the present invention generates.
In figure, 1,1 laser of λ；2,2 laser of λ；3, the first optical splitter；4, two multiply two couplers；5, the second photosynthetic road
Device；6, photoelectric conversion module；7, amplifier；8, judging module；9, channel-splitting filter；10, photo-coupler；11, optical detector.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the protection scope of invention.
Fig. 3 is a kind of flow diagram of the disconnected fine rapid detection method of fiber fence of the embodiment of the present invention, and this method includes step
It is rapid:
S101: generating the first optical signal and is coupled with the third optical signal of the second optical signal；
Specifically, the process of a kind of the first optical signal of generation and the third optical signal for being coupled with the second optical signal as shown in Figure 4
Block diagram, comprising steps of
S201: the first optical signal is generated；
S202: the first optical signal is divided into identical the first optical signal of two-way by 1:1 splitting ratio；
S203: will wherein all the way the first optical signal couple the second optical signal formed third optical signal.
First optical signal can be generated directly by 1 laser of λ, then the first optical signal is divided into identical two-way, and third light
Signal is then by wherein the first optical signal and the coupling of the second optical signal generate all the way, and between the second optical signal and the first optical signal
It will not interfere, therefore will not influence normal fiber fence early warning.
It is the flow chart element of another third optical signal for generating the first optical signal and being coupled with the second optical signal as shown in Figure 5
Figure, comprising steps of
S301: the first optical signal is generated；
S302: the first optical signal is coupled to form third optical signal with the second optical signal；
S303: third optical signal is formed into the identical third optical signal of two-way by 1:1 splitting ratio branch；
S304: by wherein the first optical signal of third optical signal coupling and the separation of the second optical signal all the way, abandoning the second optical signal,
Retain the first optical signal.
The above method first generates the first optical signal, then couples to form third optical signal with the second optical signal, is further divided into phase
With two-way third optical signal, from wherein the first optical signal of the isolated coupling of third optical signal all the way.Although the above method
Method compared to Fig. 4 is complicated, but the method for Fig. 4 can generate the first optical signal and the second optical signal attenuation difference is excessive shows
As needing further to eliminate this difference also needs to increase a same optical combiner or two multiply two couplers 4, and optical combiner
Or two multiply two couplers 4 price it is not cheap, and increased second optical signal of Fig. 4 can occupy in optical cable in practical applications
A core, but Fig. 5 can save this core, more economize on resources, therefore the scheme of Fig. 5 is easier to realize and cost is lower.
S102: the first optical signal is coupled to the 4th optical signal of output with the third optical signal for being coupled with the second optical signal；
Specifically, same as the prior art, by detecting the 4th optical signal, terminal device can be made, which to handle the judgement of the 4th optical signal, is
It is no to have disturbing signal, if the position for having disturbing signal that can quickly judge disturbance according to position of the disturbing signal in waveform.
S103: judging the whether disconnected fibre of optical fiber, if the value of the 4th optical signal is greater than zero, judges the not disconnected fibre of optical fiber, if the 4th
The value of optical signal is equal to zero, then judges the disconnected fibre of optical fiber.
It is specific: persistently there is signal from signal issuing side to signal receiving end when the value of the 4th optical signal is greater than zero explanation,
Therefore can determine whether the not disconnected fibre of optical fiber, illustrate that signal receiving end does not receive the 4th optical signal when the value of the 4th optical signal is equal to zero, therefore can
Judge the disconnected fibre of optical fiber.
It is based on the third optical signal for generating the first optical signal and being coupled with the second optical signal a kind of in Fig. 4 as shown in Figure 6
Method a kind of disconnected fine rapid detection system block diagram of fiber fence, which includes:
1 laser 1 of λ, the first optical signal for being λ 1 for generation wavelength；
2 laser 2 of λ, the second optical signal for being λ 2 for generation wavelength；
First optical splitter 3, and 1 laser 1 of λ, for the first optical signal to be divided into identical first light of two-way by 1:1 splitting ratio
Signal；
Two multiply two couplers 4, for coupling to form third optical signal the second optical signal with the first optical signal；Wherein two multiply two couplings
Clutch 4 can also be with light combination than the optical combiner equivalent replacement for 1:1.
Second optical combiner 5 is believed for receiving the first optical signal and third optical signal, and by the first optical signal and third light
It number is coupled by 1:1 light combination ratio, forms the 4th optical signal；
Optical detector 11 is connect with the second optical combiner 5, for receiving the 4th optical signal；
Photoelectric conversion module 6 is connect with optical detector 11, for converting the 4th electric signal for the 4th optical signal；
Amplifier 7 is connect with photoelectric conversion module 6, for amplifying the 4th electric signal；
Judging module 8 is connect with amplifier 7, for judging the whether disconnected fibre of optical fiber, if the value of amplified 4th electric signal is greater than
Zero, then judge the not disconnected fibre of optical fiber, if the value of amplified 4th electric signal is equal to zero, judges the disconnected fibre of optical fiber.
In an embodiment of the present invention, if two multiply two couplers 4 and are put into optical cable rear end, after cutting optical cable, optical detector 11
Or the second optical signal of 2 wavelength of λ can be received, the value of the 4th optical signal will not be zero, can generate erroneous judgement, therefore should be installed to light
Cable front end.And in order to improve the accuracy of fiber fence judgement, need to also after branch for the first optical signal that all the way in optical fiber
Increase by two and multiply two couplers 4 or optical combiner, with the excessive phenomenon of the first optical signal of elimination and the second optical signal attenuation difference.
It is based on the third optical signal for generating the first optical signal and being coupled with the second optical signal a kind of in Fig. 5 as shown in Figure 7
Method the disconnected fine rapid detection system block diagram of another fiber fence, which includes:
1 laser 1 of λ, the first optical signal for being λ 1 for generation wavelength；
2 laser 2 of λ, the second optical signal for being λ 2 for generation wavelength；
Photo-coupler 10, input terminal are connect with 1 laser 1 of λ and 2 laser 2 of λ, for believing the first optical signal and the second light
It number is coupled, forms third optical signal；
First optical splitter 3, connect with the output end of photo-coupler 10, for third optical signal to be divided into two by 1:1 splitting ratio
The identical third optical signal in road；
Channel-splitting filter 9 is connect with the first optical splitter 3, for by wherein the first optical signal and the of third optical signal coupling all the way
The separation of two optical signals, abandons the second optical signal, retains the first optical signal；
Second optical combiner 5 for receiving the first optical signal and third optical signal, and the first optical signal and third optical signal is pressed
1:1 light combination ratio is coupled, and the 4th optical signal is formed；
Optical detector 11 is connect with the second optical combiner 5, for receiving the 4th optical signal；
Photoelectric conversion module 6 is connect with optical detector 11, for converting the 4th electric signal for the 4th optical signal；
Amplifier 7 is connect with photoelectric conversion module 6, for amplifying the 4th electric signal；
Judging module 8 is connect with amplifier 7, for judging the whether disconnected fibre of optical fiber, if the value of amplified 4th electric signal is greater than
Zero, then judge the not disconnected fibre of optical fiber, if the value of amplified 4th electric signal is equal to zero, judges the disconnected fibre of optical fiber.
Be as shown in Figure 8 the embodiment of the present invention the normal interference waveform that generates of the disconnected fine rapid detection system of fiber fence and
Disconnected fibre waveform, it can be seen that even if 4th electric signal will not be in zero, therefore can avoid erroneous judgement when environment is especially quiet
The case where occur, time window it is settable it is as small as possible, it is small to can be avoided instantaneous accidental error, in interference waveform
It can be alerted rapidly when being zero.
In an embodiment of the present invention, the first optical signal: wavelength is the optical signal of λ 1, and the second optical signal: wavelength is λ's 2
Optical signal, third optical signal: the optical signal after the second optical signal coupling that wavelength is 1 first optical signal of λ and wavelength is λ 2；4th
Optical signal: the optical signal after the first optical signal and the interference of third optical signal.5th optical signal (optical signal of Fig. 1 interference): first
Optical signal after optical signal and the interference of the first optical signal.
Any position of the position that wherein channel-splitting filter 9 is placed between the first optical splitter 3 and the second optical combiner 5.The
The splitting ratio of one optical splitter 3 is 1:1.The light combination ratio of second splicer 5 is 1:1.
Claims (7)
1. a kind of disconnected fine rapid detection method of fiber fence, which is characterized in that the described method includes:
Generate the first optical signal and the third optical signal for being coupled with the second optical signal；
First optical signal is coupled to the 4th optical signal of output with the third optical signal for being coupled with the second optical signal；
Judge the whether disconnected fibre of optical fiber, if the value of the 4th optical signal is greater than zero, the not disconnected fibre of optical fiber is judged, if the 4th light
The value of signal is equal to zero, then judges the disconnected fibre of optical fiber.
2. a kind of disconnected fine rapid detection method of fiber fence according to claim 1, which is characterized in that described to generate first
The method of optical signal and the third optical signal for being coupled with the second optical signal are as follows:
Generate the first optical signal；
First optical signal is divided into identical the first optical signal of two-way by 1:1 splitting ratio；
Will wherein all the way the first optical signal couple the second optical signal form the third optical signal.
3. a kind of disconnected fine rapid detection method of fiber fence according to claim 1, which is characterized in that described to generate first
The method of optical signal and the third optical signal for being coupled with the second optical signal are as follows:
Generate the first optical signal；
First optical signal is coupled to form third optical signal with the second optical signal；
Third optical signal is formed into the identical third optical signal of two-way by 1:1 splitting ratio branch；
By wherein the first optical signal of third optical signal coupling and the separation of the second optical signal all the way, the second optical signal is abandoned, is retained
First optical signal.
4. a kind of disconnected fine rapid detection method of fiber fence according to claim 1, which is characterized in that the first light letter
It number is generated by 1 laser of λ (1), 2 laser (2) of the second optical signals λ generates.
5. a kind of disconnected fine rapid detection method of fiber fence according to claim 1, which is characterized in that in the judgement light
Before the fine fibre that whether breaks, the 4th electric signal is converted by the 4th optical signal, and the 4th electric signal is amplified.
6. a kind of disconnected fine rapid detection system of fiber fence characterized by comprising
1 laser of λ (1), the first optical signal for being λ 1 for generation wavelength；
2 laser of λ (2), the second optical signal for being λ 2 for generation wavelength；
First optical splitter (3), and 1 laser of λ (1), for the first optical signal to be divided into two-way phase by the splitting ratio of 1:1
The first same optical signal；
Two multiply two couplers (4), for coupling to form third optical signal the second optical signal with first optical signal；
Second optical combiner (5), for receiving the first optical signal and third optical signal, and by the first optical signal and third optical signal
It is coupled by 1:1 light combination ratio, forms the 4th optical signal；
Optical detector (11) is connect, for receiving the 4th optical signal with second optical combiner (5)；
Photoelectric conversion module (6) is connect with the optical detector (11), for converting the 4th electric signal for the 4th optical signal；
Amplifier (7) is connect with the photoelectric conversion module (6), for amplifying the 4th electric signal；
Judging module (8) is connect with the amplifier (7), for judging the whether disconnected fibre of optical fiber, if amplified 4th electricity
The value of signal is greater than zero, then judges that the not disconnected fibre of optical fiber judges optical fiber if the value of amplified 4th electric signal is equal to zero
Disconnected fibre.
7. a kind of disconnected fine rapid detection system of fiber fence characterized by comprising
1 laser of λ (1), the first optical signal for being λ 1 for generation wavelength；
2 laser of λ (2), the second optical signal for being λ 2 for generation wavelength；
Photo-coupler (10), input terminal are connect with 1 laser of λ (1) and 2 laser of λ (2), are used for the first optical signal
It is coupled with the second optical signal, forms third optical signal；
First optical splitter (3) is connect with the output end of the photo-coupler (10), for point by third optical signal by 1:1
Light score is the identical third optical signal of two-way；
Channel-splitting filter (9) is connect with first optical splitter (3), first for will wherein couple in third optical signal all the way
Optical signal and the separation of the second optical signal, abandon the second optical signal, retain the first optical signal；
Second optical combiner (5), for receiving the first optical signal and third optical signal, and by the first optical signal and third optical signal
It is coupled by the light combination ratio of 1:1, forms the 4th optical signal；
Optical detector (11) is connect, for receiving the 4th optical signal with second optical combiner (5)；
Photoelectric conversion module (6) is connect with the optical detector (11), for converting the 4th electric signal for the 4th optical signal；
Amplifier (7) is connect with the photoelectric conversion module (6), for amplifying the 4th electric signal；
Judging module (8) is connect with the amplifier (7), for judging the whether disconnected fibre of optical fiber, if amplified 4th electricity
The value of signal is greater than zero, then judges that the not disconnected fibre of optical fiber judges optical fiber if the value of amplified 4th electric signal is equal to zero
Disconnected fibre.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112098045A (en) * | 2020-09-10 | 2020-12-18 | 无锡科晟光子科技有限公司 | Fiber breakage detection method for distributed optical fiber early warning system under long distance |
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