CN105024749B - A kind of system and method for optical system for testing protection equipment crash rate - Google Patents
A kind of system and method for optical system for testing protection equipment crash rate Download PDFInfo
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- CN105024749B CN105024749B CN201510279090.7A CN201510279090A CN105024749B CN 105024749 B CN105024749 B CN 105024749B CN 201510279090 A CN201510279090 A CN 201510279090A CN 105024749 B CN105024749 B CN 105024749B
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Abstract
The invention discloses a kind of system and method for optical system for testing protection equipment crash rate, it is related to communication optical test path field.The system is including being devices under, light source, two optical splitters：Splitter1 and Splitter2, two photoswitches：OSW1 and OSW2, light power meter and control device；The light source is connected with OSW1, the protection optical splitter being devices under respectively by Splitter1；OSW1 bypass passage ch1 is connected with Splitter2, and bypass passage ch2 is hanging；Splitter2 is connected with OSW2, the work optical splitter being devices under respectively, and the photoswitch output end being devices under is connected with OSW2, and OSW2 is connected with light power meter；Control device is connected with OSW1, OSW2, light power meter respectively.The present invention not only significantly improves testing efficiency and measuring accuracy, and labor intensity is relatively low, is easy to people to use, suitable for promoting.
Description
Technical field
The present invention relates to communication optical test path field, and in particular to a kind of system of optical system for testing protection equipment crash rate and
Method.
Background technology
In the light path protective device (such as OLP, i.e. optical line protection equipment, light bypass apparatus etc.) commonly used in optical communication system
Portion uses OSW (photoswitch) as light path switch means.It is shown in Figure 1, the photo-detector detection built in light path protective device
When being reduced to input power below the luminous power threshold value of setting, LOS (loss of signal alarm) signal can be produced, and then trigger
Photoswitch switches.
For light path protective device, whether its crash rate (switch when can not occur or not during the switching, should not switch
Situation) need to control below a ten thousandth (i.e. 10,000 times switchings can only occur being less than error once), at present, Ren Menyi
As pass through manually and automatically two methods optical system for testing protection equipment crash rate.
The detailed process and defect to above-mentioned manually and automatically two methods are illustrated separately below.
(1) during manual test light path protective device crash rate, by manually being carried out between working light path and backup light path
Switching, checks whether luminous power changes with power meter in output light path, if then switching successfully, otherwise handoff failure.Due to
Need by crash rate control below a ten thousandth, therefore manually need to repeat said process at least more than 10,000 times, not only take
When it is laborious, operating efficiency is relatively low, and needs to calculate switching times, it is difficult to implement.
(2) automatic testing light road protection equipment crash rate, exactly controls correlate meter to be automatically performed by computer program
Test process；But, automatic testing light road protection equipment crash rate be it has been proposed that a kind of theory, currently without specific
Implementation process.
The content of the invention
For defect present in prior art, it is an object of the invention to provide a kind of failure of optical system for testing protection equipment
The system and method for rate, the present invention not only significantly improves testing efficiency and measuring accuracy, and labor intensity is relatively low, is easy to
People use, suitable for promoting.
To achieve the above objectives, the system of optical system for testing protection equipment crash rate that the present invention is provided, including tested set
It is standby, it is devices under including two optical splitters：Work optical splitter and protection optical splitter, two photo-detectors：Work photo-detector
With protection photo-detector, control unit and photoswitch；Work optical splitter is connected by the photo-detector that works with control unit, is protected
Optical splitter is by protecting photo-detector to be connected with control unit；Optical splitter, protection optical splitter, control unit work and photoswitch
It is connected；
The system of the optical system for testing protection equipment crash rate also includes light source, two optical splitters：First optical splitter
Splitter1 and the second optical splitter Splitter2, two photoswitches：First photoswitch OSW1 and the second photoswitch OSW2, light work(
Rate meter and control device；The light source is connected with OSW1, the protection optical splitter being devices under respectively by Splitter1；
OSW1 bypass passage ch1 is connected with Splitter2, and bypass passage ch2 is hanging；Splitter2 respectively with OSW2, tested set
Standby work optical splitter is connected, and the photoswitch output end being devices under is connected with OSW2, and OSW2 is connected with light power meter；Control
Device is connected with OSW1, OSW2, light power meter respectively；
The optical signal of light source is two paths of signals by Splitter1 point, wherein being all the way output to being devices under protection
The signal A of optical splitter, another road signal output to OSW1 input port；Control device control OSW1 in its output channel ch1 and
Switch between ch2, obtain a square-wave signal in output channel ch1, square-wave signal is divided into two paths of signals by Splitter1, its
In be all the way output to the test equipment photoswitch handoff trigger signal B for being devices under work optical splitter, another road is output
To the reference signal C of OSW2 ch1 input channels；The output light path signal D being devices under, which is exported to OSW2 ch2 inputs, to be led to
Road, light power meter receives OSW2 output signal.
On the basis of above-mentioned technical proposal, the control device selects computer.
The method for the optical system for testing protection equipment crash rate based on said system that the present invention is provided, comprises the following steps：
S1：Light source is set to continuous light output state, the photoswitch being devices under is connected with work optical splitter, this
When work optical splitter output signal B be in high level state；The photoswitch being devices under is defeated as what is be devices under using B
Go out signal D to be exported, go to step S2；
S2：Control device according to the switching times and switching time pre-set, control OSW1 in its output channel ch1 and
Switch between ch2；The work photo-detector being devices under detects whether B luminous power is less than the signal pre-set and loses in real time
Alarm LOS thresholdings are lost, if so, then B signal is in low level, step S3 are gone to, otherwise B signal is in high level, goes to step
S4；
S3：The photo-detector that works produces LOS alarms to control unit, and control unit control protection photo-detector detection is received
Protect optical splitter output signal A when, control unit by photoswitch switch to protect optical splitter is connected, using A as be tested
Apparatus output signal D is exported, and goes to step S5；
S4：Work photo-detector to control unit send LOS alarm disappearance of signal, control unit by photoswitch switch to
The optical splitter that works is connected, and photoswitch is exported B as output signal D is devices under, and goes to step S5；
S5：OSW2 is controlled to switch at least two in turn back and forth between its input channel ch1, ch2 by control device；Often
After switching once, the signal of reception is carried out by 1 signal waveform after sampling of sampling and draw by light power meter；OSW2
When being worked on input channel ch1, the signal that light power meter is received is C, when OSW2 works on input channel ch2, luminous power
The signal that meter is received is D, goes to step S6；
S6：Judge D signal waveform in each high and low level time section, if to be alignd with C signal waveform, if so,
Then display is devices under effectively；Otherwise display is devices under failure.
On the basis of above-mentioned technical proposal, step S6 is completed using automatic decision mode, and it specifically includes following steps：
C and D signal waveform is digitized respectively, high level is " 1 ", low level is " 0 ", forms the number of two " 01010101 " forms
Word signal stream；C and D digital signal streams are subjected to AND operation by bit, if operation result is " 0 ", display is tested to be set
The number of " 0 " is failure total degree in standby failure, operation result；Otherwise display is devices under effectively.
On the basis of above-mentioned technical proposal, step S6 is completed using automatic decision mode, and it specifically includes following steps：
The C and D that are stored in control device signal waveform are reset, in each high and low level time section, passes through eye recognition C and D
Signal waveform signal waveform it is whether concordant, if be then devices under effectively, be otherwise devices under failure.
It is further comprising the steps of after step S6 on the basis of above-mentioned technical proposal：S7：According to the switching in step S2
Number of times and the total degree for being devices under failure, calculating obtain crash rate.
On the basis of above-mentioned technical proposal, switching time described in step S2 is that 1 OSW1 of switching in every 4 seconds output is led to
Road.
On the basis of above-mentioned technical proposal, OSW2 is cut in turn between its input channel ch1, ch2 described in step S5
The number of times changed be 3 back and forth.
Compared with prior art, the advantage of the invention is that：
The system of the present invention action of emulated artificial switching-over light path and can check luminous power automatically in fully automated manner
The changed power of meter, and then judge whether the light path being devices under switching fails；After the completion of the number of times of switching-over light path, automatic meter
Calculate crash rate.Compared with manual test in the prior art, the present invention not only significantly improves testing efficiency and measuring accuracy, and
And labor intensity is relatively low, it is easy to people to use, suitable for promoting.
Brief description of the drawings
Fig. 1 is the connection block diagram of light path protective device in the prior art；
Fig. 2 is the connection block diagram of the system of optical system for testing protection equipment crash rate in the embodiment of the present invention；
The curve map that Fig. 3 a are signal A in the embodiment of the present invention；
The curve map that Fig. 3 b are signal B in the embodiment of the present invention；
The curve map that Fig. 3 c are signal C in the embodiment of the present invention；
Signal D curve map when Fig. 3 d is are devices under effective in the embodiment of the present invention；
Signal A curve map Fig. 3 e is are devices under failing in the embodiment of the present invention when.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The system of optical system for testing protection equipment crash rate in the embodiment of the present invention, is got based on following principle.
Be typically when being run due to light path protective device in real network forbid frequent switching in the short time (than if any
A little product settings, when continuous switching 3 times in 10 minutes, then forbid any switching action below in a period of time), the present invention will
Automatic test is realized, then needs releasing is above-mentioned to forbid, has accelerated test process, shortens the testing time.At the same time, it is tested
Equipment also needs to be arranged to switch auto-returned state, and so-called auto-returned is exactly to be protected when equipment working light path signal disconnects
When shield channel signal is normal, Backup lightpath is automatically switched to, when working light path signal recovers normal, the work of equipment auto-returned
Light path.
The system of optical system for testing protection equipment crash rate in the embodiment of the present invention, including need the light path tested protection to set
Standby, shown in Figure 1, light path protective device (being hereinafter referred to as devices under) includes two optical splitters：Work optical splitter and guarantor
Protect optical splitter, two photo-detectors：Work photo-detector and protection photo-detector, control unit and photoswitch.Work optical splitter
By working, photo-detector is connected with control unit, and protection optical splitter is by protecting photo-detector to be connected with control unit；Work
Optical splitter, protection optical splitter, control unit are connected with photoswitch.
Shown in Figure 2, the system of shown optical system for testing protection equipment crash rate also includes light source, two optical splitters：The
One optical splitter Splitter1 and the second optical splitter Splitter2, two photoswitches：First photoswitch OSW1 and the second photoswitch
OSW2, light power meter and control device (control device is computer in the present embodiment).
Light source is connected with OSW1, the protection optical splitter being devices under respectively by Splitter1, OSW1 bypass passage
Ch1 is connected with Splitter2, and bypass passage ch2 is hanging；Splitter2 respectively with OSW2, the work optical splitter being devices under
It is connected, the photoswitch output end being devices under is connected with OSW2, and OSW2 is connected with light power meter；Computer respectively with OSW1,
OSW2, light power meter are connected.
The optical signal of light source is two paths of signals by Splitter1 point, wherein being all the way output to being devices under protection
The signal A (A luminous power is X-10dBm, and its signal curve is referring to shown in Fig. 3 a) of optical splitter, another road signal output to OSW1
Input port.
Computer control OSW1 switches between its output channel ch1 and ch2, and a square wave is obtained in output channel ch1
Square-wave signal is divided into two paths of signals by signal, Splitter1, wherein being all the way output to the survey for being devices under work optical splitter
Equipment photoswitch handoff trigger signal B is tried, another road is reference signal C of the output to OSW2 ch1 input channels.It is tested to set
Standby output light path signal D is exported to OSW2 ch2 input channels, and light power meter receives OSW2 output signal.
Referring to shown in Fig. 3 b and Fig. 3 c, signal B is identical with phase relation with C signal shape；B is in high level time work(
Rate is XdBm, and luminous power when C is in high level is ZdBm；B is identical in low level luminous power with C, is YdBm, Y value
The minimum level value that can be detected for light power meter.
The method of optical system for testing protection equipment crash rate based on said system in the embodiment of the present invention, including following step
Suddenly：
S1：Light source is set to CW (Continue Wave, continuous light output state), initial setting up will be devices under
To be worked on working light path, the photoswitch that will be devices under with work optical splitter be connected, the optical splitter that now works it is defeated
Go out signal B and be in high level state；The photoswitch being devices under is exported B as the output signal D being devices under
While being devices under itself light insertion loss (ignore, D is identical with B luminous power), go to step S2.
S2：Computer according to the switching times and switching time pre-set, control OSW1 in its output channel ch1 and
Switching (in the present embodiment every 4 seconds switch 1 time) between ch2, can change during switching B luminous power (when OSW1 is switched to ch1, B
Luminous power be more than or equal to LOS thresholdings, when OSW1 is switched to ch2, B luminous power is less than LOS thresholdings)；The work being devices under
Make photo-detector and detect whether B luminous power is less than LOS (loss of signal alarm) thresholding pre-set in real time, if so, then B believes
Number be in low level, go to step S3, otherwise B signal be in high level, go to step S4.
S3：The photo-detector that works produces LOS alarms to control unit, and control unit control protection photo-detector detection is received
When protecting the signal A of optical splitter output (A is normal, and A is constantly in thang-kng state), photoswitch is switched to and protected by control unit
Protect optical splitter to be connected, A is exported as output signal D is devices under, D is identical with A luminous power (to ignore tested set
Itself standby light insertion loss), go to step S5.
S4：Work photo-detector to control unit send LOS alarm disappearance of signal, control unit by photoswitch switch to
The optical splitter that works is connected, and photoswitch is exported B as output signal D is devices under, and goes to step S5.
S5：OSW2 is controlled to switch in turn between its input channel ch1, ch2 by computer, in 1 high level or 1
At least two is back and forth (in the present embodiment for 3 back and forth) during low level signal；Referring to shown in Fig. 3 c and Fig. 3 d, often switch once
Afterwards, the signal of reception is carried out by 1 signal waveform after sampling of sampling and draw by light power meter.OSW2 is logical in input
When being worked on road ch1, the signal that light power meter is received is C, when OSW2 works on input channel ch2, what light power meter was received
Signal is D, goes to step S6.
S6：By automatic or manual judgment mode, judge D signal waveform in (i.e. each high and low level of same period
Period) in, if alignd with C signal waveform, if so, then display is devices under effectively, going to step S7；Otherwise show
It is devices under failing (such as shown in Fig. 3 e, dotted line represents unjustified), goes to step S7.
When in step S6 by automatic decision mode, C and D signal waveform is digitized respectively, high level is " 1 ", low
Level is " 0 ", forms the digital signal streams of two " 01010101 " forms, and C and D digital signal streams are carried out into "AND" by bit
Computing, i.e., digital same product is 1, and different products are that the number of " 0 " in 0, operation result is failure total degree.
In step S6 during artificial judgment mode, the signal waveform for preserving C and D in a computer is reset, in the same time
Section in, it is whether concordant by eye recognition C and the signal waveform of D signal waveform, if be then devices under effectively, otherwise by
Test equipment fails.
S7：Switching times and the total degree for being devices under failure in step S2, calculating obtain crash rate, tied
Beam.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
On the premise of the principle of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as the protection of the present invention
Within the scope of.The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (8)
1. a kind of system of optical system for testing protection equipment crash rate, including be devices under, it is devices under including two light splitting
Device：Work optical splitter and protection optical splitter, two photo-detectors：Work photo-detector and protection photo-detector, control unit and
Photoswitch；Work optical splitter be connected by the photo-detector that works with control unit, protect optical splitter by protect photo-detector and
Control unit is connected；Work optical splitter, protection optical splitter, control unit are connected with photoswitch；
It is characterized in that：The system of the optical system for testing protection equipment crash rate also includes light source, two optical splitters：First light splitting
Device Splitter1 and the second optical splitter Splitter2, two photoswitches：First photoswitch OSW1 and the second photoswitch OSW2, light
Power meter and control device；The light source is connected with OSW1, the protection optical splitter being devices under respectively by Splitter1；
OSW1 bypass passage ch1 is connected with Splitter2, and bypass passage ch2 is hanging；Splitter2 respectively with OSW2, tested set
Standby work optical splitter is connected, and the photoswitch output end being devices under is connected with OSW2, and OSW2 is connected with light power meter；Control
Device is connected with OSW1, OSW2, light power meter respectively；
The optical signal of light source is two paths of signals by Splitter1 point, wherein being all the way output to being devices under protecting light splitting
The signal A of device, another road signal output to OSW1 input port；Control device control OSW1 its output channel ch1 and ch2 it
Between switch, obtain a square-wave signal in output channel ch1, square-wave signal is divided into two paths of signals by Splitter2, wherein all the way
For output to the test equipment photoswitch handoff trigger signal B for being devices under work optical splitter, another road is output to OSW2
Ch1 input channels reference signal C；The output light path signal D being devices under is exported to OSW2 ch2 input channels, light
Power meter receives OSW2 output signal.
2. the system of optical system for testing protection equipment crash rate as claimed in claim 1, it is characterised in that：The control device choosing
Use computer.
3. a kind of method of the optical system for testing protection equipment crash rate based on system described in claim 1 or 2, it is characterised in that
Comprise the following steps：
S1：Light source is set to continuous light output state, the photoswitch being devices under is connected with work optical splitter, now work
The output signal B for making optical splitter is in high level state；The photoswitch being devices under is believed B as the output being devices under
Number D is exported, and goes to step S2；
S2：Control device is according to the switching times and switching time pre-set, and OSW1 is in its output channel ch1 and ch2 for control
Between switch；The work photo-detector being devices under detects whether B luminous power is less than the dropout pre-set in real time
LOS thresholdings are alerted, if so, then B signal is in low level, step S3 are gone to, otherwise B signal is in high level, goes to step S4；
S3：The photo-detector that works produces LOS alarms to control unit, and control unit control protection photo-detector detection receives protection
During the signal A of optical splitter output, control unit switches to photoswitch with protecting optical splitter to be connected, using A as being devices under
Output signal D is exported, and goes to step S5；
S4：Work photo-detector sends LOS alarm disappearance of signal to control unit, and photoswitch is switched to and worked by control unit
Optical splitter is connected, and photoswitch is exported B as output signal D is devices under, and goes to step S5；
S5：OSW2 is controlled to switch at least two in turn back and forth between its input channel ch1, ch2 by control device；Often switch
After once, the signal of reception is carried out by 1 signal waveform after sampling of sampling and draw by light power meter；OSW2 is defeated
Enter when being worked on passage ch1, the signal that light power meter is received is C, and when OSW2 works on input channel ch2, light power meter connects
The signal of receipts is D, goes to step S6；
S6：Judge D signal waveform in each high and low level time section, if to be alignd with C signal waveform, if so, then showing
Show and be devices under effectively；Otherwise display is devices under failure.
4. the method for optical system for testing protection equipment crash rate as claimed in claim 3, it is characterised in that：Step S6 is using automatic
Judgment mode is completed, and it specifically includes following steps：C and D signal waveform is digitized respectively, high level is " 1 ", low level
For " 0 ", the digital signal streams of two " 01010101 " forms are formed；C and D digital signal streams are subjected to "AND" fortune by bit
Calculate, if operation result is " 0 ", the number that display is devices under " 0 " in failure, operation result is failure total degree；It is no
Then display is devices under effectively.
5. the method for optical system for testing protection equipment crash rate as claimed in claim 3, it is characterised in that：Step S6 is using automatic
Judgment mode is completed, and it specifically includes following steps：The C and D that are stored in control device signal waveform are reset, each
It is whether concordant by eye recognition C and the signal waveform of D signal waveform in high and low level time section, set if being then tested
Effect is had, failure is otherwise devices under.
6. the method for the optical system for testing protection equipment crash rate as described in any one of claim 3 to 5, it is characterised in that step
It is further comprising the steps of after S6：S7：Switching times and the total degree for being devices under failure in step S2, are calculated
To crash rate.
7. the method for the optical system for testing protection equipment crash rate as described in any one of claim 3 to 5, it is characterised in that：Step
Switching time described in S2 is 1 OSW1 of switching in every 4 seconds output channel.
8. the method for the optical system for testing protection equipment crash rate as described in any one of claim 3 to 5, it is characterised in that：Step
The number of times that OSW2 described in S5 switches in turn between its input channel ch1, ch2 be 3 back and forth.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1294795A (en) * | 1998-03-18 | 2001-05-09 | 西门子公司 | Method for establishing communication on standby link in optical transmission facilities |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002017533A2 (en) * | 2000-08-25 | 2002-02-28 | Corvis Corporation | Optical transmission systems including optical protection systems, apparatuses, and methods |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1294795A (en) * | 1998-03-18 | 2001-05-09 | 西门子公司 | Method for establishing communication on standby link in optical transmission facilities |
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Effective date of registration: 20181109 Address after: 430000 Building 1, Tan Lake Road, Tibet Dragon Island Development Area, Jiangxia District, Wuhan, Hubei, China, two Patentee after: Wuhan net sharp Test Technology Co., Ltd. Address before: 430074, No. 88, postal academy road, Hongshan District, Hubei, Wuhan Patentee before: Wuhan Rui Rui Laboratory (information industry light communication product quality supervision and inspection center) |