CN104683026A - System and method for detecting light time-domain reflection analysis instrument - Google Patents
System and method for detecting light time-domain reflection analysis instrument Download PDFInfo
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- CN104683026A CN104683026A CN201510089048.9A CN201510089048A CN104683026A CN 104683026 A CN104683026 A CN 104683026A CN 201510089048 A CN201510089048 A CN 201510089048A CN 104683026 A CN104683026 A CN 104683026A
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Abstract
The invention discloses a system and a method for detecting a light time-domain reflection analysis instrument. The system comprises an open circuit detection unit, a short optical fiber detection unit, a blind area detection unit, an attenuation detection unit, a dynamic range detection unit, an intelligent switching unit, a control unit and a display unit. The method comprises the following steps: 1, transmitting a detection signal to the intelligent switching unit from the control unit; 2, receiving the detection signal transmitted from the control unit through the intelligent switching unit, and switching the open circuit detection unit, the short optical fiber detection unit, the blind area detection unit, the attenuation detection unit and the dynamic range detection unit; 3, detecting the light time-domain reflection analysis instrument through the open circuit detection unit, the short optical fiber detection unit, the blind area detection unit, the attenuation detection unit and the dynamic range detection unit; 4, displaying the detection result through the display unit. By adopting the system and the method, the technical problems that a standard detection environment and a detection data judgment template cannot be provided, the detection environment cannot be automatically switched, automation cannot be achieved, and the detection result is not accurate, are solved.
Description
Technical field
The present invention relates to communication test field, specifically, relate to a kind of system and method detecting optical time domain reflection analysis meter.
Background technology
At present, along with the development that communication network technology makes rapid progress, in order to check whether transfer of data is complete and correct in program process, and Various types of data transmission measuring set arises at the historic moment, for optical time domain reflection analyzer, generally speaking, need to possess following requirement, the first, measuring accuracy is high, namely 0.1m is accurate to the testing length of optical fiber, 0.01dB be can be as accurate as to the decay of optical fiber; The second, fast response time, namely refers to the optical fiber link to up to a hundred kilometers, only needs the quality that just can detect this optical fiber link a few second; 3rd, simple operation is light and handy, and namely referring to can a hand-held key operation, and user does not need to be configured instrument, a key intelligence test automatically; 4th, reliable and stable, namely require the main performance of tester not to be subject to as far as possible or be subject to the impact of ambient temperature change and environmental change less, to improve stability and the reliability of system.
But, when optical time domain reflection analysis meter dispatches from the factory, the monitoring and testing of test instrumentation is taken time and effort very much, for the detection of test instrumentation in prior art, calibration before mainly test instrumentation being tested by staff and the test of various option and carry out the test of various environment, finally carry out checking that report and correlated performance detect, its action is complicated, most of time also needs manually to calibrate, and various option carries out manual test, take time and effort, have a strong impact on the operating efficiency of staff.
Patent application 201510013084.7 discloses a kind of system and method detecting optical time domain reflection analysis meter, and system comprises: creating environments unit, data processing unit, data transmission unit, data storage cell and intelligent terminal; Described method comprises: step 1: creating environments unit creates different test environments, and detects test instrumentation; Step 2: the testing result that data processing unit reception environment creating unit transmits, and this testing result is converted to data; Step 3: the transfer of data that data processing unit is changed by data transmission unit is to data storage cell and intelligent terminal; Step 4: data storage cell stores the data that data processing unit is changed; Step 5: the data analysis that intelligent terminal is changed data processing unit.The method in use, needs to build creating environments unit, and can not carry out intelligence and switch, and when detecting described optical time domain reflection analysis meter, method is complicated, needs repeatedly to test.
Therefore, how to research and develop a kind of system and method detecting optical time domain reflection analysis meter, just become technical problem urgently to be resolved hurrily.
Summary of the invention
The subject matter that the application solves is to provide a kind of system and method detecting optical time domain reflection analysis meter, to solve test environment and the test data judge templet that can provide standard that prior art cannot realize, can be automatically switched test environment, automation is realized when detecting described optical time domain reflection analysis meter, and test result technical problem more accurately.
In order to solve the problems of the technologies described above, the invention discloses a kind of system detecting optical time domain reflection analysis meter, comprise: open circuit detecting unit, short fiber detecting unit, blind area detecting unit, decay detecting unit, dynamic range detecting unit, intelligent switch unit, control unit and display unit, wherein
Described open circuit detecting unit, couples mutually with intelligent switch unit, and for verifying that described optical time domain reflection analysis meter is not when connecting optical fiber, testing result is zero;
Described short fiber detecting unit, couples mutually with intelligent switch unit, for detecting the length whether can testing short fiber of described optical time domain reflection analysis meter;
Described blind area detecting unit, couples mutually with intelligent switch unit, for detecting Event Dead Zone and the decay blind area of described optical time domain reflection analysis meter;
Described decay detecting unit, couples mutually with intelligent switch unit, for detecting the accuracy of the optical fiber link decay of described optical time domain reflection analysis meter;
Described dynamic range detecting unit, couples mutually with intelligent switch unit, for detecting the dynamic range of described optical time domain reflection analysis meter;
Described intelligent switch unit, couple mutually with described control unit, detecting unit of opening a way, short fiber detecting unit, blind area detecting unit, decay detecting unit and dynamic range detecting unit respectively, switch for open-circuit detecting unit, short fiber detecting unit, blind area detecting unit, decay detecting unit, dynamic range detecting unit;
Described control unit, couples mutually with described intelligent switch unit and display unit respectively, for sending detection signal to intelligent switch unit and controlling display unit display testing result;
Described display unit, couples mutually with described control unit, for showing testing result.
Further, wherein, described short fiber detecting unit, comprises further: the optical fiber of 2 5m, and wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by ring flange with another root optical fiber.
Further, wherein, described blind area detecting unit, comprises further: the optical fiber of 2 1km, and wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by ring flange with another root optical fiber.
Further, wherein, described decay detecting unit, comprises further: the optical fiber of 2 1km, and wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by attenuator with another root optical fiber.
Further, wherein, described dynamic range detecting unit, comprises further: the optical fiber of 2 3km, and wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by adjustable attenuator with another root optical fiber.
The invention also discloses a kind of method detecting optical time domain reflection analysis meter, comprise the following steps:
Step 1: control unit sends detection signal to intelligent switch unit;
Step 2: intelligent switch unit receives the detection signal that described control unit sends, open-circuit detecting unit, short fiber detecting unit, blind area detecting unit, decay detecting unit, dynamic range detecting unit switch;
Step 3: open circuit detecting unit, short fiber detecting unit, blind area detecting unit, decay detecting unit, dynamic range detecting unit detect optical time domain reflection analysis meter;
Step 4: display unit shows testing result.
Further, wherein, when intelligent switch unit switches to short fiber detecting unit, described step 3 also comprises:
Use the optical fiber of 25 meters, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by ring flange with another root optical fiber, tests by the length of described optical time domain reflection analysis meter to optical fiber.
Further, wherein, when intelligent switch unit switches to blind area detecting unit, described step 3 also comprises:
Use the optical fiber of 2 1km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by ring flange with another root optical fiber, detects Event Dead Zone and the decay blind area of described optical time domain reflection analysis meter.
Further, wherein, when intelligent switch unit switches to decay detecting unit, described step 3 also comprises:
Use the optical fiber of 2 1km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by attenuator with another root optical fiber, detects the accuracy of the optical fiber link decay of described optical time domain reflection analysis meter.
Further, wherein, when intelligent switch unit switches to dynamic range detecting unit,
Use the optical fiber of 2 3km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by adjustable attenuator with another root optical fiber, detects the dynamic range of described optical time domain reflection analysis meter.
Compared with prior art, a kind of system and method detecting optical time domain reflection analysis meter described in the application, reaches following effect:
(1) a kind of system detecting optical time domain reflection analysis meter of the present invention, there is open circuit detecting unit, short fiber detecting unit, blind area detecting unit, decay detecting unit and dynamic range detecting unit, provide the testing environment of standard, there is unified criterion, special verification agency need not be sent to, and achieve automatic detection.
(2) a kind of system detecting optical time domain reflection analysis meter of the present invention, have intelligent switch unit, can realize automatic switchover test cell, and test result can show at display unit.
(3) a kind of method detecting optical time domain reflection analysis meter of the present invention, method is simple, and not high to user of service's patent skill set requirements, input cost is low, and test result accurately and reliably.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the overall structure figure of the system of detection optical time domain reflection analysis meter described in the embodiment of the present invention 1;
Fig. 2 is the particular flow sheet of the method for detection optical time domain reflection analysis meter described in the embodiment of the present invention 2;
Fig. 3 is the collection of illustrative plates that the blind area of detection optical time domain reflection analysis meter described in the embodiment of the present invention 1 is detected;
Fig. 4 is the collection of illustrative plates that the Event Dead Zone of Application Example described in the embodiment of the present invention 3 detects;
Fig. 5 is the collection of illustrative plates that the decay blind area of Application Example described in the embodiment of the present invention 3 is detected;
Fig. 6 is the collection of illustrative plates that the decay of Application Example described in the embodiment of the present invention 3 detects;
Fig. 7 is the collection of illustrative plates that the dynamic range of Application Example described in the embodiment of the present invention 3 detects.
Embodiment
As employed some vocabulary to censure specific components in the middle of specification and claim.Those skilled in the art should understand, and hardware manufacturer may call same assembly with different noun.This specification and claims are not used as with the difference of title the mode distinguishing assembly, but are used as the criterion of differentiation with assembly difference functionally." comprising " as mentioned in the middle of specification and claim is in the whole text an open language, therefore should be construed to " comprise but be not limited to "." roughly " refer to that in receivable error range, those skilled in the art can solve the technical problem within the scope of certain error, reach described technique effect substantially.In addition, " couple " word and comprise directly any and indirectly electric property coupling means at this.Therefore, if describe a first device in literary composition to be coupled to one second device, then represent described first device and directly can be electrically coupled to described second device, or be indirectly electrically coupled to described second device by other devices or the means that couple.Specification subsequent descriptions is implement the better embodiment of the application, and right described description is for the purpose of the rule that the application is described, and is not used to the scope limiting the application.The protection range of the application is when being as the criterion depending on the claims person of defining.
Below in conjunction with accompanying drawing, the application is described in further detail, but not as the restriction to the application.
Embodiment 1
As shown in Figure 1, the invention discloses a kind of system detecting optical time domain reflection analysis meter, comprise: open circuit detecting unit 101, short fiber detecting unit 102, blind area detecting unit 103, decay detecting unit 104, dynamic range detecting unit 105, intelligent switch unit 106, control unit 107 and display unit 108, wherein
Described open circuit detecting unit 101, couples mutually with intelligent switch unit 106, and for verifying that described optical time domain reflection analysis meter is not when connecting optical fiber, testing result is zero;
Described short fiber detecting unit 102, couples mutually with intelligent switch unit 106, for detecting the length whether can testing short fiber of described optical time domain reflection analysis meter;
Described blind area detecting unit 103, couples mutually with intelligent switch unit 106, for detecting Event Dead Zone and the decay blind area of described optical time domain reflection analysis meter;
Described decay detecting unit 104, couples mutually with intelligent switch unit 106, for detecting the accuracy of the optical fiber link decay of described optical time domain reflection analysis meter;
Described dynamic range detecting unit 105, couples mutually with intelligent switch unit 106, for detecting the dynamic range of described optical time domain reflection analysis meter;
Described intelligent switch unit 106, couple mutually with described control unit 107, detecting unit 101 of opening a way, short fiber detecting unit 102, blind area detecting unit 103, decay detecting unit 104 and dynamic range detecting unit 105 respectively, switch for open-circuit detecting unit 101, short fiber detecting unit 102, blind area detecting unit 103, decay detecting unit 104, dynamic range detecting unit 105;
Described control unit 107, couples mutually with described intelligent switch unit 106 and display unit 108 respectively, shows testing result for sending detection signal to intelligent switch unit 106 and controlling display unit 108;
Described display unit 108, couples, for showing testing result mutually with described control unit 107.
Preferably, described short fiber detecting unit 102, comprise further: the optical fiber of 2 5m, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, the other end is connected by ring flange with another root optical fiber, then tests by the length of described optical time domain reflection analysis meter to optical fiber.Short fiber of the present invention, refers to the optical fiber that length is less than 100 meters.
After having tested, wherein a kind of test result is: the total length of optical fiber is 10 meters, there is pip the position be connected by ring flange at two optical fiber, and this just illustrates that this optical time domain reflection analysis meter is when measuring optical fiber length, can measure the optical fiber of 5 meters of length.
Certainly, after having tested, also another test result may be had, namely the total length of optical fiber is 10 meters, the position be connected by ring flange at two optical fiber does not have pip, and this just illustrates that this optical time domain reflection analysis meter is when measuring optical fiber length, can not measure the optical fiber of 5 meters of length.
About the length of the optical fiber measured by optical time domain reflection analysis meter, it is determined by the dynamic range of optical time domain reflection analysis meter, the factor such as insertion loss, the loss of optical cable, the loss of optical fiber splice (mechanical splice, fusion splice) of optical device; The present invention is according to formula
Calculate the length of optical fiber.
Wherein, L is optical fiber testing system monitoring optical fiber maximum length;
P is the dynamic range of OTDR module;
Ac is insertion loss, refers to the insertion loss sum of the equipment such as OTDR, optical switch, WDM, filter;
Af is optical cable mean attenuation coefficient (dB/km);
As is bare electrode joint average attenuation system (dB/km);
Mc is lightguide cable link degree (dB) more than needed;
Ma is measuring accuracy degree (dB) more than needed.
Preferably, described blind area detecting unit 103, comprise further: the optical fiber of 2 1km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, the other end is connected by ring flange with another root optical fiber, detects Event Dead Zone and the decay blind area of described optical time domain reflection analysis meter.
Optical time domain reflection analysis meter of the present invention is the optical time domain reflection analysis meter based on ODTR further, is to utilize the information of Fresnel reflection to be located by connecting a little, fibre-optic terminus or breakpoint.Fresnel reflection is discrete reflection, and it is caused by the indivedual points in whole piece optical fiber, and these points are made up of the factor causing reverse parameter to change, the gap of such as glass and air.On these aspects, have very strong back-scattering light and be reflected back.
Described Event Dead Zone, refers to after Fresnel reflection, and optical time domain reflection analysis meter detects whether two optical fiber have pip in the position be connected by ring flange.
Described decay blind area, after referring to Fresnel reflection, optical time domain reflection analysis meter accurately can measure the minimum range of continuous events loss wherein.When required minimum range is from generation reflection event, until reflection is reduced to the 0.5dB of the backscattering rank of optical fiber.
As shown in Figure 2, Event Dead Zone of the present invention and decay blind area calculate according to this Fig. 2, the computational methods of described Event Dead Zone are the position of the performance number decline 1.5dB of the summit of the reflectivity curve from Fig. 2, distance between AB as shown in Figure 2, is the value of Event Dead Zone of the present invention according to the distance in Fig. 2 between AB.
The computational methods of described decay blind area are the position that the performance number of the end end of reflectivity curve according to Fig. 2 increases 0.5dB vertically upward, and the distance namely between CD as shown in Figure 2, is the value of decay blind area of the present invention according to the distance in Fig. 2 between CD.
Preferably, described decay detecting unit 104, comprise further: the optical fiber of 2 1km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, the other end is connected by attenuator with another root optical fiber, detect the accuracy of the optical fiber link decay of described optical time domain reflection analysis meter, namely according to the test result of tested instrument, judge that whether the decay tested out of test instrumentation is consistent with the decay set by checkout equipment, thus determine that whether the test result of tested instrument is accurate.
In addition, attenuator described here, it can be adjustable attenuator, also can be the attenuator of fixed value, such as performance number decays to the attenuator of 6dB, or performance number decays to the attenuator of 8dB, and performance number decays to the attenuator of 3dB, but described fixing attenuator, is also not limited to above three kinds, can also be other attenuators.If select performance number to be the attenuator of 6dB, namely judge whether optical time domain reflection analysis meter reduces 6dB by the performance number of optical fiber when measuring, if the performance number of display result is shown as reduce 6dB, then can prove that the accurate performance of this optical time domain reflection analysis meter when testing decay is high.
Preferably, described dynamic range detecting unit 105, comprises further: the optical fiber of 2 3km, and wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, the other end is connected by attenuator with another root optical fiber, detects the dynamic range of described optical time domain reflection analysis meter.
Generally, the dynamic range of optical time domain reflection analysis meter is higher, then illustrate that this optical time domain reflection analysis meter can measure the distance of longer optical fiber, and therefore the dynamic range of optical time domain reflection analysis meter is the important indicator detected.
During concrete detection, described optical time domain reflection analysis meter generally all indicates a corresponding dynamic range, according to optical time domain reflection analysis meter institute target dynamic range, is configured this optical time domain reflection analysis meter; Then select suitable attenuator, to obtain best test environment, verify the dynamic range of described optical time domain reflection analysis meter.
In addition, attenuator described here can be adjustable attenuator, can dynamically enclose directly regulated attenuator automatically like this, avoid arbitrarily changing attenuator according to optical time domain reflection analysis meter institute target.
Embodiment 2
In addition, as shown in Figure 3, for the invention also discloses a kind of method detecting optical time domain reflection analysis meter, comprise the following steps:
Step 1: control unit sends detection signal to intelligent switch unit;
Step 2: intelligent switch unit receives the detection signal that described control unit sends, open-circuit detecting unit, short fiber detecting unit, blind area detecting unit, decay detecting unit, dynamic range detecting unit switch;
Step 3: open circuit detecting unit, short fiber detecting unit, blind area detecting unit, decay detecting unit, dynamic range detecting unit detect optical time domain reflection analysis meter;
Step 4: display unit shows testing result.
Preferably, when intelligent switch unit switches to short fiber detecting unit, described step 3 also comprises:
Use the optical fiber of 25 meters, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by ring flange with another root optical fiber, tests by the length of described optical time domain reflection analysis meter to optical fiber.Short fiber of the present invention, refers to the optical fiber that length is less than 100 meters.
After having tested, wherein a kind of test result is: the total length of optical fiber is 10 meters, there is pip the position be connected by ring flange at two optical fiber, and this just illustrates that this optical time domain reflection analysis meter is when measuring optical fiber length, can measure the optical fiber of 5 meters of length.
Certainly, after having tested, also another test result may be had, namely the total length of optical fiber is 10 meters, the position be connected by ring flange at two optical fiber does not have pip, and this just illustrates that this optical time domain reflection analysis meter is when measuring optical fiber length, can not measure the optical fiber of 5 meters of length.
About the length of the optical fiber measured by optical time domain reflection analysis meter, it is determined by the dynamic range of optical time domain reflection analysis meter, the factor such as insertion loss, the loss of optical cable, the loss of optical fiber splice (mechanical splice, fusion splice) of optical device; The present invention is according to formula
Calculate the length of optical fiber.
Wherein, L is optical fiber testing system monitoring optical fiber maximum length;
P is the dynamic range of OTDR module;
Ac is insertion loss, refers to the insertion loss sum of the equipment such as OTDR, optical switch, WDM, filter;
Af is optical cable mean attenuation coefficient (dB/km);
As is bare electrode joint average attenuation system (dB/km);
Mc is lightguide cable link degree (dB) more than needed;
Ma is measuring accuracy degree (dB) more than needed.
Preferably, when intelligent switch unit switches to blind area detecting unit, described step 3 also comprises:
Use the optical fiber of 2 1km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by ring flange with another root optical fiber, detects Event Dead Zone and the decay blind area of described optical time domain reflection analysis meter.
Optical time domain reflection analysis meter of the present invention is the optical time domain reflection analysis meter based on ODTR further, is to utilize the information of Fresnel reflection to be located by connecting a little, fibre-optic terminus or breakpoint.Fresnel reflection is discrete reflection, and it is caused by the indivedual points in whole piece optical fiber, and these points are made up of the factor causing reverse parameter to change, the gap of such as glass and air.On these aspects, have very strong back-scattering light and be reflected back.
Described Event Dead Zone, refers to after Fresnel reflection, and optical time domain reflection analysis meter detects whether two optical fiber have pip in the position be connected by ring flange.
Described decay blind area, after being Fresnel reflection, optical time domain reflection analysis meter accurately can measure the minimum range of continuous events loss wherein.When required minimum range is from generation reflection event, until reflection is reduced to the 0.5dB of the backscattering rank of optical fiber.
Preferably, when intelligent switch unit switches to decay detecting unit, described step 3 also comprises:
Use the optical fiber of 2 1km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by attenuator with another root optical fiber, detects the accuracy of the optical fiber link decay of described optical time domain reflection analysis meter.According to the test result of tested instrument, judge that whether the decay tested out of test instrumentation is consistent with the decay set by checkout equipment, thus determine that whether the test result of tested instrument is accurate.
In addition, attenuator described here, it can be adjustable attenuator, also can be the attenuator of fixed value, such as performance number decays to the attenuator of 6dB, or performance number decays to the attenuator of 8dB, and performance number decays to the attenuator of 3dB, but described fixing attenuator, is also not limited to above three kinds, can also be other attenuators.Such as, performance number is selected to be the attenuator of 6dB, namely judging whether optical time domain reflection analysis meter reduces 6dB by the performance number of optical fiber, if the performance number of display result is shown as reduce 6dB, then can proving that the accurate performance of this optical time domain reflection analysis meter when testing decay is high.
Preferably, when intelligent switch unit switches to dynamic range detecting unit,
Use the optical fiber of 2 3km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by attenuator with another root optical fiber, detects the dynamic range of described optical time domain reflection analysis meter.
Generally, the dynamic range of optical time domain reflection analysis meter is higher, then illustrate that this optical time domain reflection analysis meter can measure the distance of longer optical fiber, and therefore the dynamic range of optical time domain reflection analysis meter is the important indicator detected.
During concrete detection, described optical time domain reflection analysis meter generally all indicates a corresponding dynamic range, according to optical time domain reflection analysis meter institute target dynamic range, arranges this optical time domain reflection analysis meter; Then select suitable attenuator, to obtain best test environment, verify the dynamic range of described optical time domain reflection analysis meter.
In addition, in addition, attenuator described here can be adjustable attenuator, can dynamically enclose directly regulated attenuator automatically like this, avoid arbitrarily changing attenuator according to optical time domain reflection analysis meter institute target.
Embodiment 3
In addition, the invention also discloses a kind of Application Example applying the system and method for detection optical time domain reflection analysis meter of the present invention, be specially:
First self-inspection is carried out to the system detecting optical time domain reflection analysis meter, if self-inspection is not passed through, the then place, fault point of inquiry system, and fix a breakdown, and then carry out self-inspection, if self-inspection is passed through, then the system detecting optical time domain reflection analysis meter is connected optical time domain reflection analysis meter and detect.
According to the model of optical time domain reflection analysis meter, and the corresponding parameter of institute's target on optical time domain reflection analysis meter, be configured the parameter of optical time domain reflection analysis meter, then send detection signal to intelligent switch unit by control unit, then intelligent switch unit switches.
The system detecting optical time domain reflection analysis meter is first switched to open circuit detecting unit by intelligence switch unit, and first verify that described optical time domain reflection analysis meter is not when connecting optical fiber, whether testing result is zero; If 0, then can perform the detection of the next item down; If not 0, then to adjust accordingly, the result of optical time domain reflection analysis meter is adjusted to 0.
Intelligence switch unit will detect the systematic evaluation of optical time domain reflection analysis meter to short fiber detecting unit, preferably, described short fiber detecting unit, comprise further: the optical fiber of 2 5m, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, the other end is connected by ring flange with another root optical fiber, then tests by the length of described optical time domain reflection analysis meter to optical fiber.After system and method for the present invention detects, be divided into three kinds of situations:
1) if detect, the total length of optical fiber is 10 meters, and have pip in the position that two optical fiber are connected by ring flange, this just illustrates that this optical time domain reflection analysis meter is when measuring optical fiber length, can measure the optical fiber of 5 meters of length, and the performance of optical time domain reflection analysis meter is very high.
2) if detect, the total length of optical fiber is 10 meters, and there is no pip in the position that two optical fiber are connected by ring flange, this just illustrates that this optical time domain reflection analysis meter is when measuring optical fiber length, the optical fiber of 5 meters of length can not be measured, illustrate that the performance of optical time domain reflection analysis meter is higher, but lower than the first situation.
3) total length can not detecting optical fiber if occur is 10 meters, may be now occurred some problems in the process detected, can select to repeat measure several times more, if but the total length still can not detecting optical fiber after many detections is several times 10 meters, then illustrate that the performance of optical time domain reflection analysis meter is lower.Can judge whether this optical time domain reflection analysis meter can be used for the detection of short fiber according to above three kinds of situations.
Certainly, the length of described optical fiber is according to formula
Carry out calculating.
Intelligence switch unit will detect the systematic evaluation of optical time domain reflection analysis meter to blind area detecting unit, described blind area detecting unit comprises further: the optical fiber of 2 1km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, the other end is connected by ring flange with another root optical fiber, detects Event Dead Zone and the decay blind area of described optical time domain reflection analysis meter.
As shown in Figure 4, the collection of illustrative plates schematic diagram of the Event Dead Zone detected for adopting the blind area of the system and method for detection optical time domain reflection analysis meter of the present invention, when detecting, the design parameter configuration of described optical time domain reflection analysis meter: test specification 2.5km, test pulsewidth is 3ns, testing time is 10s, and measuring accuracy is accuracy test, and the distance that can obtain Event Dead Zone is 3 meters.
As shown in Figure 5, the collection of illustrative plates schematic diagram of the decay blind area detected for adopting the blind area of the system and method for detection optical time domain reflection analysis meter of the present invention, the distance that can obtain decay blind area is 8 meters.
Intelligence switch unit will detect the systematic evaluation of optical time domain reflection analysis meter to decay detecting unit, described decay detecting unit, comprise further: the optical fiber of 2 1km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, the other end is connected by attenuator with another root optical fiber, detect the accuracy of the optical fiber link decay of described optical time domain reflection analysis meter, namely according to the test result of tested instrument, that judges that the performance number of optical fiber is noly decays to required power.The present embodiment attenuator used is the attenuator of 6dB, as shown in Figure 6, being the decay collection of illustrative plates of the present embodiment when measuring, can finding out, the present embodiment, when the decay of optical fiber link detecting optical tester, can be decayed and make performance number reduce 6dB.
Intelligence switch unit will detect the systematic evaluation of optical time domain reflection analysis meter to dynamic range detecting unit, described dynamic range detecting unit, comprise further: the optical fiber of 2 3km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, the other end is connected by attenuator with another root optical fiber, detects the dynamic range of described optical time domain reflection analysis meter.
According to institute's target dynamic range on optical time domain reflection analysis meter, this optical time domain reflection analysis meter is configured; Then select adjustable attenuator, to obtain best test environment, verify the dynamic range of described optical time domain reflection analysis meter.As shown in Figure 7, be the result schematic diagram of the dynamic range of the optical time domain reflection analysis meter detected of the present embodiment, the value of described dynamic range is initial value-noise level+1.5dB, is the peak-noise level+1.5dB of dynamic range curve.
After detection completes, the data of test are sent to described display unit and show by described optical time domain reflection analysis meter, and analyzing and testing result, contrast with the detection template of instrument, and generate examining report.
Compared with prior art, a kind of system and method detecting optical time domain reflection analysis meter described in the application, reaches following effect:
(1) a kind of system detecting optical time domain reflection analysis meter of the present invention, there is open circuit detecting unit, short fiber detecting unit, blind area detecting unit, decay detecting unit and dynamic range detecting unit, provide the testing environment of standard, there is unified criterion, special verification agency need not be sent to, and achieve automatic detection.
(2) a kind of system detecting optical time domain reflection analysis meter of the present invention, has intelligent switch unit, can realize automatic switchover test cell, and can show at display unit.
(3) a kind of method detecting optical time domain reflection analysis meter of the present invention, method is simple, and not high to user of service's patent skill set requirements, input cost is low, and test result accurately and reliably.
Because method part has been described in detail the embodiment of the present application, the expansion of the System and method for corresponding part related in embodiment is described omit here, repeat no more.Description for particular content in system can the content of reference method embodiment, no longer specifically limits here.
Above-mentioned explanation illustrate and describes some preferred embodiments of the application, but as previously mentioned, be to be understood that the application is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in application contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from the spirit and scope of the application, then all should in the protection range of the application's claims.
Claims (10)
1. one kind is detected the system of optical time domain reflection analysis meter, it is characterized in that, comprise: open circuit detecting unit, short fiber detecting unit, blind area detecting unit, decay detecting unit, dynamic range detecting unit, intelligent switch unit, control unit and display unit, wherein
Described open circuit detecting unit, couples mutually with intelligent switch unit, and for verifying that described optical time domain reflection analysis meter is not when connecting optical fiber, testing result is zero;
Described short fiber detecting unit, couples mutually with intelligent switch unit, for detecting the length whether can testing short fiber of described optical time domain reflection analysis meter;
Described blind area detecting unit, couples mutually with intelligent switch unit, for detecting Event Dead Zone and the decay blind area of described optical time domain reflection analysis meter;
Described decay detecting unit, couples mutually with intelligent switch unit, for detecting the accuracy of the optical fiber link decay of described optical time domain reflection analysis meter;
Described dynamic range detecting unit, couples mutually with intelligent switch unit, for detecting the dynamic range of described optical time domain reflection analysis meter;
Described intelligent switch unit, couple mutually with described control unit, detecting unit of opening a way, short fiber detecting unit, blind area detecting unit, decay detecting unit and dynamic range detecting unit respectively, switch for open-circuit detecting unit, short fiber detecting unit, blind area detecting unit, decay detecting unit, dynamic range detecting unit;
Described control unit, couples mutually with described intelligent switch unit and display unit respectively, for sending detection signal to intelligent switch unit and controlling display unit display testing result;
Described display unit, couples mutually with described control unit, for showing testing result.
2. the system of detection optical time domain reflection analysis meter according to claim 1, it is characterized in that, described short fiber detecting unit, comprise further: the optical fiber of 2 5m, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by ring flange with another root optical fiber.
3. the system of detection optical time domain reflection analysis meter according to claim 1, it is characterized in that, described blind area detecting unit, comprise further: the optical fiber of 2 1km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by ring flange with another root optical fiber.
4. the system of detection optical time domain reflection analysis meter according to claim 1, it is characterized in that, described decay detecting unit, comprise further: the optical fiber of 2 1km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by attenuator with another root optical fiber.
5. the system of detection optical time domain reflection analysis meter according to claim 1, it is characterized in that, described dynamic range detecting unit, comprise further: the optical fiber of 2 3km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by adjustable attenuator with another root optical fiber.
6. detect a method for optical time domain reflection analysis meter, it is characterized in that, comprise the following steps:
Step 1: control unit sends detection signal to intelligent switch unit;
Step 2: intelligent switch unit receives the detection signal that described control unit sends, open-circuit detecting unit, short fiber detecting unit, blind area detecting unit, decay detecting unit, dynamic range detecting unit switch;
Step 3: open circuit detecting unit, short fiber detecting unit, blind area detecting unit, decay detecting unit, dynamic range detecting unit detect optical time domain reflection analysis meter;
Step 4: display unit shows testing result.
7. the method for detection optical time domain reflection analysis meter according to claim 6, is characterized in that, when intelligent switch unit switches to short fiber detecting unit, described step 3 also comprises:
Use the optical fiber of 25 meters, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by ring flange with another root optical fiber, tests by the length of described optical time domain reflection analysis meter to optical fiber.
8. the method for detection optical time domain reflection analysis meter according to claim 6, is characterized in that, when intelligent switch unit switches to blind area detecting unit, described step 3 also comprises:
Use the optical fiber of 2 1km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by ring flange with another root optical fiber, detects Event Dead Zone and the decay blind area of described optical time domain reflection analysis meter.
9. the method for detection optical time domain reflection analysis meter according to claim 6, is characterized in that, when intelligent switch unit switches to decay detecting unit, described step 3 also comprises:
Use the optical fiber of 2 1km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by attenuator with another root optical fiber, detects the accuracy of the optical fiber link decay of described optical time domain reflection analysis meter.
10. the method for detection optical time domain reflection analysis meter according to claim 6, is characterized in that, when intelligent switch unit switches to dynamic range detecting unit,
Use the optical fiber of 2 3km, wherein one end of an optical fiber is connected with optical time domain reflection analysis meter, and the other end is connected by adjustable attenuator with another root optical fiber, detects the dynamic range of described optical time domain reflection analysis meter.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106385282A (en) * | 2016-09-08 | 2017-02-08 | 诺仪器（中国）有限公司 | OTDR internal light path detection method and system |
| CN109004973A (en) * | 2018-07-04 | 2018-12-14 | 广州广电计量检测股份有限公司 | A kind of OTDR capability evaluating device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070258483A1 (en) * | 2006-05-08 | 2007-11-08 | Sunrise Telecom Incorporated | Network profiling system having nonphysical layer test system |
| CN103414529A (en) * | 2013-08-26 | 2013-11-27 | 华北计算技术研究所 | Universal automatic testing and fault diagnosis system |
| CN204481816U (en) * | 2015-02-26 | 2015-07-15 | 北京奥普维尔科技有限公司 | A kind of system detecting optical time domain reflection analysis meter |
-
2015
- 2015-02-26 CN CN201510089048.9A patent/CN104683026A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070258483A1 (en) * | 2006-05-08 | 2007-11-08 | Sunrise Telecom Incorporated | Network profiling system having nonphysical layer test system |
| CN103414529A (en) * | 2013-08-26 | 2013-11-27 | 华北计算技术研究所 | Universal automatic testing and fault diagnosis system |
| CN204481816U (en) * | 2015-02-26 | 2015-07-15 | 北京奥普维尔科技有限公司 | A kind of system detecting optical time domain reflection analysis meter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106385282A (en) * | 2016-09-08 | 2017-02-08 | 诺仪器（中国）有限公司 | OTDR internal light path detection method and system |
| CN106385282B (en) * | 2016-09-08 | 2019-04-23 | 一诺仪器（中国）有限公司 | Optical path detection method and system inside OTDR |
| CN109004973A (en) * | 2018-07-04 | 2018-12-14 | 广州广电计量检测股份有限公司 | A kind of OTDR capability evaluating device and method |
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Application publication date: 20150603 |