CN106996838A - A kind of ROTDR performance indications automatic test and calibration system and method - Google Patents

A kind of ROTDR performance indications automatic test and calibration system and method Download PDF

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Publication number
CN106996838A
CN106996838A CN201710390124.9A CN201710390124A CN106996838A CN 106996838 A CN106996838 A CN 106996838A CN 201710390124 A CN201710390124 A CN 201710390124A CN 106996838 A CN106996838 A CN 106996838A
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China
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temperature
test
length
optical fiber
data
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CN106996838B (en
Inventor
袁明
李立功
吴寅初
孙福德
闫继送
施斌
于文林
陈晓峰
徐瑞
徐玉华
毕宗义
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CETC 41 Institute
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CETC 41 Institute
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K15/00Testing or calibrating of thermometers
    • G01K15/005Calibration
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K15/00Testing or calibrating of thermometers
    • G01K15/007Testing

Abstract

The present invention relates to a kind of ROTDR performance indications automatic test and calibration system and method, the system includes:System host, one end of the tested ROTDR of system host connection, the tested ROTDR other end connects 1 × 8 low-loss optically switch, other end first passage to the 8th passage of 1 × 8 low-loss optically switch connects a fiber optic temperature coefficient tested optical fiber respectively successively, the standard single mode or multimode fibre and a standard fiber of six different lengths, 1 × 8 low-loss optically switchs third channel to the identical or different optical fibre fixed-length heater of the other end difference connecting length of the 7th channel attached standard single mode or multimode fibre, the fiber optic temperature coefficient tested optical fiber is wound on elongated optical fiber temperature-measurement fixture, the standard single mode or multimode fibre of the second channel connection of elongated optical fiber temperature-measurement fixture and 1 × 8 the low-loss optically switch may be contained within inside high/low temperature insulating box, the high/low temperature insulating box and optical fibre fixed-length heater are connected with the system host respectively.

Description

A kind of ROTDR performance indications automatic test and calibration system and method
Technical field
The invention belongs to the technical field of distributed fiber temperature measuring device, more particularly to a kind of ROTDR performance indications are certainly Dynamic detection calibration system and method.
Background technology
, it is necessary to right during development, production and inspection use in distributed fiber temperature measuring device (abbreviation ROTDR) Spatial resolution index, temperature measurement accuracy index, thermometric repeatability index, measurement length accuracy index of ROTDR equipment etc. are closed Key performance indications are tested.
At present, ROTDR is carried out testing main by various equipment progress manual test.However, to complete above-mentioned space Resolution ratio index, temperature measurement accuracy index, thermometric repeatability index, the measurement Key Performance Indicator such as length accuracy index it is comprehensive Test needs to use plurality of devices, and step is complicated, and the consuming time is long, have impact on the development of ROTDR equipment, produces and examined Testing performance index calibration efficiency in journey;Meanwhile, during manually detection calibration, complex operation, artificial operation is easy Operating error is introduced, detection calibration precision is reduced, the test effect of ROTDR equipment is influenceed.
In summary, in the prior art for ROTDR testing performance indexes when the manual test step that exists is complicated, the time The problem of long, low calibration efficiency and low calibration accuracy, still lack effective solution.
The content of the invention
The present invention is in order to overcome in the prior art the manual test step that exists during for ROTDR testing performance indexes to answer The problem of miscellaneous, time length, low calibration efficiency and low calibration accuracy, there is provided a kind of ROTDR performance indications automatic test and calibration system And method.
To achieve these goals, the present invention is using a kind of following technical scheme:
A kind of ROTDR performance indications automatic test and calibration system, the system includes:
System host, the tested ROTDR of system host connection, is controlled to tested ROTDR, is tested ROTDR light Interface connects the COM ends of 1 × 8 low-loss optically switch, and the other end first passage that 1 × 8 low-loss optically is switched to the 8th leads to Road connects fiber optic temperature coefficient tested optical fiber, the standard single mode of six different lengths or multimode fibre and one respectively successively Standard fiber, it is another to the 7th channel attached standard single mode or multimode fibre that 1 × 8 low-loss optically switchs third channel The identical or different optical fibre fixed-length heater of end difference connecting length, the fiber optic temperature coefficient tested optical fiber is wound in elongated On optical fiber temperature-measurement fixture, the standard single mode of the second channel connection of elongated optical fiber temperature-measurement fixture and 1 × 8 the low-loss optically switch Or multimode fibre may be contained within inside high/low temperature insulating box, the high/low temperature insulating box and optical fibre fixed-length heater respectively with institute State system host connection.
Further, the standard single mode or multimode fibre of six different lengths include the first standard single mode or multimode light Fine, the second standard single mode or multimode fibre, the 3rd standard single mode or multimode fibre, the 4th standard single mode or multimode fibre, the 5th Standard single mode or multimode fibre, the 6th standard single mode or multimode fibre;The optical fibre fixed-length heater is fixed including the first optical fiber Long heater, the second optical fibre fixed-length heater, the 3rd optical fibre fixed-length heater, the 4th optical fibre fixed-length heater and Five optical fibre fixed-length heaters;
Further, first standard single mode or multimode fibre use 0.5km standard single modes or multimode fibre, and described the One standard single mode or multimode fibre are connected with the second channel that 1 × 8 low-loss optically is switched;
Further, second standard single mode or multimode fibre use 0.5km standard single modes or multimode fibre, and described the Two standard single modes or multimode fibre are connected with the third channel that 1 × 8 low-loss optically is switched, second standard single mode or multimode light The fine other end is connected with the first optical fibre fixed-length heater;
Further, the 3rd standard single mode or multimode fibre use 5km standard single modes or multimode fibre, the described 3rd Standard single mode or multimode fibre are connected with the fourth lane that 1 × 8 low-loss optically is switched, the 3rd standard single mode or multimode fibre The other end is connected with the second optical fibre fixed-length heater;
Further, the 4th standard single mode or multimode fibre use 10km standard single modes or multimode fibre, and described the Four standard single modes or multimode fibre are connected with the fourth lane that 1 × 8 low-loss optically is switched, the 4th standard single mode or multimode light The fine other end is connected with the 3rd optical fibre fixed-length heater;
Further, the 5th standard single mode or multimode fibre use 20km standard single modes or multimode fibre, and described the Two standard single modes or multimode fibre are connected with the Five-channel that 1 × 8 low-loss optically is switched, the 5th standard single mode or multimode light The fine other end is connected with the 4th optical fibre fixed-length heater;
Further, the 6th standard single mode or multimode fibre use 30km standard single modes or multimode fibre, and described the Two standard single modes or multimode fibre are connected with the 6th passage that 1 × 8 low-loss optically is switched, the 6th standard single mode or multimode light The fine other end is connected with the 5th optical fibre fixed-length heater;
Further, the standard fiber uses 1km length standard optical fiber, and the standard fiber is opened with 1 × 8 low-loss optically The 7th passage connection closed.
Further, the elongated optical fiber temperature-measurement fixture includes elongated optical fiber temperature-measurement jig main body, and the change long optical fibers are surveyed Warm jig main body two ends are respectively arranged with elongated optical fiber temperature-measurement clamp-support structures;
The elongated optical fiber temperature-measurement jig main body is metallic tube-shaped structure, the elongated optical fiber temperature-measurement jig main body outer surface Optical Fiber Winding groove is set, and the Optical Fiber Winding groove is spiral semicircle shallow slot, is carved with centimeter scale on groove, wound in groove 0.5m~ The tested optical fiber of 5m length;The elongated optical fiber temperature-measurement clamp-support structures are cylindrical structural, the elongated optical fiber temperature-measurement folder The often end of tool main body is uniformly arranged the elongated optical fiber temperature-measurement clamp-support structures of four cylindrical structurals, and with it is described elongated The horizontal end face of optical fiber temperature-measurement jig main body is at an angle.
Further, the first optical fibre fixed-length heater, the second optical fibre fixed-length heater and the 3rd optical fibre fixed-length Heater uses 1m long optical fibers fixed length heaters, and the 4th optical fibre fixed-length heater is heated using 2m long optical fibers fixed length Device, the 5th optical fibre fixed-length heater uses 3m long optical fibers fixed length heaters;The 1m long optical fibers fixed length heating dress Put, 2m long optical fibers fixed length heaters and 3m long optical fibers fixed length heaters, its structure includes:
Fixed-length optical fiber heater top board structure and fixed-length optical fiber heater base arrangement, the fixed-length optical fiber heating dress Put and fixed-length optical fiber heater structure assembling screw is respectively provided with top board structure and fixed-length optical fiber heater base arrangement, pass through Screw is fixed through screw;The fixed-length optical fiber heater base arrangement connects with fixed-length optical fiber heater top board structure Resistive heater is set on tactile end face;Fixed-length optical fiber fixing groove, institute are set on the fixed-length optical fiber heater top board structure Fixed-length optical fiber fixing groove is stated using spiral semicircle shallow slot, centimeter scale is carved with groove, the sense of 1m, 2m or 3m length is wound in groove Warm optical fiber or temperature sensing optical cable, and be adhesively fixed, the fixed-length optical fiber heater top board structure is heated with fixed-length optical fiber and filled If being uniformly arranged dry temperature sensor on the end face for putting base arrangement contact, the temperature sensor connects with the system host Connect.
The present invention in order to overcome in the prior art for ROTDR testing performance indexes when the manual test step that exists answer The problem of miscellaneous, time length, low calibration efficiency and low calibration accuracy, there is provided a kind of ROTDR performance indications automatic test and calibration system And method.
To achieve these goals, the present invention is using a kind of following technical scheme:
A kind of automatic detection calibration method of ROTDR performance indications, it is automatic that this method is based on a kind of above-mentioned ROTDR performance indications Detection calibration system, the specific steps of this method include:
(1) tested ROTDR one end is connected by USB interface or network interface with system host, 1 × 8 low-loss optically is opened The tested ROTDR of COM channel fibers access of the pass other end;
(2) system host and tested ROTDR start shooting, and judge that system host is tested and whether is the communication that is tested between ROTDR Normally, if communication is normal, step (3) is transferred to, if communication failure, step (9) is transferred to;
(3) test function is selected, if the coefficient test of selection fiber optic temperature, is transferred to step (4);If selecting Temperature repeatability to survey Examination, is transferred to step (5);If selecting temperature accuracy test, step (6) is transferred to;If selecting temperature space resolution test, it is transferred to Step (7);If the most long measuring distance index test of selection, is transferred to step (8);
(4) fiber optic temperature coefficient test is carried out, rear output optical fibre temperature coefficient is completed, is transferred to step (9);
(5) Temperature repeatability test is carried out, outputs test result after being completed, is transferred to step (9);
(6) temperature accuracy test is carried out, outputs test result after being completed, is transferred to step (9);
(7) temperature space resolution test is carried out, outputs test result after being completed, is transferred to step (9);
(8) most long measuring distance index test is carried out, outputs test result after being completed, is transferred to step (9);
(9) test terminates.
Further, in the step (4), what fiber optic temperature coefficient was tested concretely comprises the following steps:
The fiber optic temperature coefficient tested optical fiber for needing test temperature coefficient is wrapped in elongated optical fiber temperature-measurement fixture by (4-1) On, coiling length is L, and L is 1m~5m;
(4-2) sets fiber optic temperature coefficient tested optical fiber length L numerical value, temperature coefficient test temperature model in system host Lower limit TL and temperature coefficient Range of measuring temp upper limit TH are enclosed, according to temperature coefficient Range of measuring temp lower limit TL and temperature coefficient Range of measuring temp upper limit TH mathematic interpolation heating stepping TS:
Set test to count I=0, set up and calculate anti-Stokes Raman data and Stokes Raman data ratio array RTZ [0]~[N], TTZ [0]~[N], N round value for (TH-TL)/TS's;
(4-3) system host controls 1 × 8 low-loss optically switch to be switched to first passage, and controls high/low temperature insulating box temperature Degree constantly reads high/low temperature calorstat temperature data TN to TL+TS*I, as TN=TL+TS*I, and system host control is tested ROTDR starts test, reads Temperature Distribution test data MT;
(4-4) system host analysis temperature distribution tests data MT, reads optical fiber heating region anti-Stokes Raman number According to Stokes Raman data, calculate anti-Stokes Raman data and Stokes Raman data ratio R T, RT be put into Array RTZ [I], TN are put into array TTZ [I];
(4-5) test counts I and adds 1, and system host controls high/low temperature calorstat temperature to TL+TS*I, constantly reads height Warm calorstat temperature data TN, as TN=TL+TS*I, the tested ROTDR of system host control starts test, reads Temperature Distribution Test data MT;
(4-6) system host analysis temperature distribution tests data MT, reads optical fiber heating region anti-Stokes Raman number According to Stokes Raman data, calculate anti-Stokes Raman data and Stokes Raman data ratio R T, RT be put into Array RTZ [I], TN are put into array TTZ [I];
(4-7) judges whether TN is more than TH, if TN is more than TH, is transferred to step (4-5), otherwise, goes to step (4-8);
RTZ [0]~[N] that (4-8) is obtained according to above-mentioned steps, TTZ [0]~[N], analyze tested optical fiber temperature coefficient.
Further, in the step (5), what Temperature repeatability was tested concretely comprises the following steps:
(5-1) sets Temperature repeatability Range of measuring temp lower limit TL and Temperature repeatability test temperature in system host Range limit TH, calculates temperature range intermediate value TM=(TH+TL)/2, sets test to count I=0, high/low temperature calorstat temperature TX =TL;
(5-2) system host controls 1 × 8 low-loss optically switch to be switched to second channel, and controls high/low temperature insulating box temperature Degree constantly reads high/low temperature calorstat temperature data TN to TX, as TN=TX, and the tested ROTDR of system host control starts to survey Examination, reads Temperature Distribution test data MT [I];
(5-3) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (5-2), otherwise, is transferred to Step (5-4);
Temperature averages TLAVE, temperature minimum value TLMIN and temperature in (5-4) calculating MT [0]~MT [19] data are most Big value TLMAX, obtains the Temperature repeatability TLR at a temperature of TL;
(5-5) sets test to count I=0, high/low temperature calorstat temperature TX=TM in system host;
(5-6) system host controls high/low temperature calorstat temperature to TX, constantly reads high/low temperature calorstat temperature data TN, As TN=TX, the tested ROTDR of system host control starts test, reads Temperature Distribution test data MT [I];
(5-7) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (5-6), otherwise, is transferred to Step (5-8);
Temperature averages TMAVE, temperature minimum value TMMIN and temperature in (5-8) calculating MT [0]~MT [19] data are most Big value TMMAX, obtains the Temperature repeatability TMR at a temperature of TM;
(5-9) sets test to count I=0, high/low temperature calorstat temperature TX=TH in system host;
(5-10) system host controls high/low temperature calorstat temperature to TX, constantly reads high/low temperature calorstat temperature data TN, as TN=TX, the tested ROTDR of system host control starts test, reads Temperature Distribution test data MT [I];
(5-11) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (5-9), otherwise, turns Enter step (5-12);
(5-12) calculates temperature averages THAVE, temperature minimum value THMIN and the temperature in MT [0]~MT [19] data Maximum of T HMAX, obtains the Temperature repeatability THR at a temperature of TH;
Temperature repeatability test value TMR at a temperature of Temperature repeatability test value TLR, TM at a temperature of (5-13) output TL, with And Temperature repeatability test value THR at a temperature of TH.
Further, in the step (6), what temperature accuracy was tested concretely comprises the following steps:
(6-1) sets temperature accuracy Range of measuring temp lower limit TL and temperature accuracy test temperature in system host Range limit TH, calculates temperature range intermediate value TM=(TH+TL)/2, sets test to count I=0, high/low temperature calorstat temperature TX =TL;
(6-2) system host controls 1 × 8 low-loss optically switch to be switched to second channel, and controls high/low temperature insulating box temperature Degree constantly reads high/low temperature calorstat temperature data TN to TX, as TN=TX, and the tested ROTDR of system host control starts to survey Examination, reads Temperature Distribution test data MT [I];
(6-3) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (6-2), otherwise, is transferred to Step (6-4);
(6-4) calculates the temperature averages TLAVE and temperature standard difference TLSTD in MT [0]~MT [19] data;
(6-5) sets test to count I=0, high/low temperature calorstat temperature TX=TM in system host;
(6-6) system host controls high/low temperature calorstat temperature to TX, constantly reads high/low temperature calorstat temperature data TN, As TN=TX, the tested ROTDR of system host control starts test, reads Temperature Distribution test data MT [I];
(6-7) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (6-6), otherwise, is transferred to Step (6-8);
(6-8) calculates the temperature averages TMAVE and temperature standard difference TMSTD in MT [0]~MT [19] data;
(6-9) sets test to count I=0, high/low temperature calorstat temperature TX=TH in system host;
(6-10) system host controls high/low temperature calorstat temperature to TX, constantly reads high/low temperature calorstat temperature data TN, as TN=TX, the tested ROTDR of system host control starts test, reads Temperature Distribution test data MT [I];
(6-11) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (5-9), otherwise, turns Enter step (5-12);
(6-12) calculate MT [0]~MT [19] data in temperature averages THAVE and with temperature standard difference THSTD;
Temperature standard difference TMSTD at a temperature of temperature standard difference TLSTD, TM at a temperature of (6-13) output TL, and TH temperature Lower temperature standard difference THSTD.
Further, in the step (7), temperature space resolution test is concretely comprised the following steps:
(7-1) sets temperature space resolution test temperature range lower limit TL and temperature space resolution ratio in system host Range of measuring temp upper limit TH, calculates TM=60 DEG C of temperature range intermediate value, sets high/low temperature calorstat temperature TX=TM;
(7-2) system host controls 1 × 8 low-loss optically switch to be switched to third channel, and controls 1m long optical fibers fixed length to add Thermal is heated to TX, constantly reads 1m long optical fibers fixed length heater temperature sensor data TN, as TN=TX, system master The tested ROTDR of machine control starts test, reads Temperature Distribution test data MT;
(7-3) reads the long test data M10 of Temperature Distribution test data MT end 10m;
(7-4) analyzes M10 data crest location MPX, and crest value MPY, from MPX forward searching value closest to 0.9MPY Position MPX9, and value is closest to 0.1MPY position MPX1, calculates temperature space resolution value MSX=MPX9-MPX1;
Temperature space resolution value MSX at a temperature of (7-5) output TM.
Further, in the step (8), most long measuring distance index test is concretely comprised the following steps:
(8-1) sets most long measuring distance index test temperature range lower limit TL and most long measuring distance in system host Index test temperature range upper limit TH, calculates TM=60 DEG C of temperature range intermediate value, sets high/low temperature calorstat temperature TX=TM;
(8-2) system host controls 1 × 8 low-loss optically switch to be switched to fourth lane, and controls 1m long optical fibers fixed length to add Thermal is heated to TX, constantly reads 1m long optical fibers fixed length heater temperature sensor data TN, as TN=TX, system master The tested ROTDR of machine control starts test, reads Temperature Distribution test data MT;
(8-3) reads the optical fiber and heating optical fiber length L4 of fourth lane, reads Temperature Distribution test data MT length L4- The long test data M20 of 20m to 20m between L4, analyze M20 data crests, peak value MPY are obtained, if MPY>It is 50 DEG C, then most long to survey Examination is transferred to step (8-4), otherwise, DM=1000 is transferred to step (8-10) apart from DM=5000;
(8-4) system host controls 1 × 8 low-loss optically switch to be switched to Five-channel, and controls 1m long optical fibers fixed length to add Thermal is heated to TX, constantly reads 1m long optical fibers fixed length heater temperature sensor data TN, as TN=TX, system master The tested ROTDR of machine control starts test, reads Temperature Distribution test data MT;
(8-5) reads the optical fiber and heating optical fiber length L5 of Five-channel, reads Temperature Distribution test data MT length L5- The long test data M20 of 20m to 20m between L5, analyze M20 data crests, peak value MPY are obtained, if MPY>It is 50 DEG C, then most long to survey Examination is transferred to step (8-6), otherwise, DM=5000 is transferred to step (8-10) apart from DM=10000;
(8-6) system host controls 1 × 8 low-loss optically switch to be switched to the 6th passage, and controls 2m long optical fibers fixed length to add Thermal is heated to TX, constantly reads 2m long optical fibers fixed length heater temperature sensor data TN, as TN=TX, system master The tested ROTDR of machine control starts test, reads Temperature Distribution test data MT;
(8-7) reads the optical fiber and heating optical fiber length L6 of the 6th passage, reads Temperature Distribution test data MT length L6- The long test data M20 of 20m to 20m between L6, analyze M20 data crests, peak value MPY are obtained, if MPY>It is 50 DEG C, then most long to survey Examination is transferred to step (8-8), otherwise, DM=10000 is transferred to step (8-10) apart from DM=20000;
(8-8) system host controls 1 × 8 low-loss optically switch to be switched to the 7th passage, and controls 3m long optical fibers fixed length to add Thermal is heated to TX, constantly reads 3m long optical fibers fixed length heater temperature sensor data TN, as TN=TX, system master The tested ROTDR of machine control starts test, reads Temperature Distribution test data MT;
(8-9) reads the optical fiber and heating optical fiber length L7 of the 7th passage, reads Temperature Distribution test data MT length L7- The long test data M20 of 20m to 20m between L7, analyze M20 data crests, peak value MPY are obtained, if MPY>It is 50 DEG C, then most long to survey Examination is apart from DM=30000, otherwise, DM=20000;
Most long measuring distance DM at a temperature of (8-10) output TM.
Compared with prior art, beneficial effects of the present invention:
The present invention proposes a kind of ROTDR performance indications automatic test and calibration system and method, and the system is comprising a kind of small The elongated optical fiber temperature-measurement fixture of type and optical fibre fixed-length heater, this method is based on spatial discrimination of the system to ROTDR equipment The automatic survey of the Key Performance Indicators such as rate index, temperature measurement accuracy index, thermometric repeatability index, measurement length accuracy index Examination, reduces the difficulty and complexity of ROTDR equipment detection calibrations, and lifting ROTDR develops, produces and examined equipment during use Detection calibration efficiency, improves production efficiency, while due to the survey of manual operation introducing during reducing manually detection calibration Error is tried, detection calibration precision is lifted.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing further understanding of the present application, and the application's shows Meaning property embodiment and its illustrate be used for explain the application, do not constitute the improper restriction to the application.
Fig. 1 is a kind of structural representation of ROTDR performance indications automatic test and calibration system of the invention;
Fig. 2 is the structural representation of elongated optical fiber temperature-measurement fixture of the invention;
Fig. 3 is the structural representation of optical fibre fixed-length heater of the present invention;
Wherein:1- system hosts;2- is tested ROTDR;The low-loss optically of 3-1 × 8 switch;4- fiber optic temperature coefficients are by light-metering It is fine;5- high/low temperature insulating boxs;The elongated optical fiber temperature-measurement fixtures of 6-:The elongated optical fiber temperature-measurement clamp-support structures of 601-, the elongated light of 602- Fine temperature measuring clamp main body, 603- Optical Fiber Winding grooves;The standard single modes of 7- first or multimode fibre;The standard single modes of 8- second or multimode light It is fine;The standard single modes of 9- the 3rd or multimode fibre;The standard single modes of 10- the 4th or multimode fibre;The standard single modes of 11- the 5th or multimode light It is fine;The standard single modes of 12- the 6th or multimode fibre;13- standard fibers;14- the first optical fibre fixed-length heaters;The optical fiber of 15- second Fixed length heater;The optical fibre fixed-length heaters of 16- the 3rd;The optical fibre fixed-length heaters of 17- the 4th;The optical fibre fixed-lengths of 18- the 5th Heater:1801- fixed-length optical fiber heater top board structures, 1802- fixed-length optical fiber heater base arrangements, 1803- is fixed Long optical fibers heater structure assembles screw, 1804- resistive heaters, 1805- fixed-length optical fiber fixing grooves, 1806- TEMPs Device.
Embodiment:
It is noted that described further below is all exemplary, it is intended to provide further instruction to the application.Unless another Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
In the case where not conflicting, the feature in embodiment and embodiment in the application can be mutually combined.Tie below Closing accompanying drawing, the invention will be further described with embodiment.
Embodiment 1:
As background technology is introduced, there is exist during for ROTDR testing performance indexes manual in the prior art The problem of testing procedure complexity, time length, low calibration efficiency and low calibration accuracy, surveys automatically there is provided a kind of ROTDR performance indications Try calibration system and method.
In a kind of typical embodiment of the application, adopt the following technical scheme that:
As shown in figure 1,
A kind of ROTDR performance indications automatic test and calibration system, the system includes:
System host 1, the system host 1 connects tested ROTDR2 by modes such as network/serial ports/USB/WIFI, right Tested ROTDR2 is controlled, and the optical interface for being tested ROTDR2 connects the COM ends of 1 × 8 low-loss optically switch 3, and described 1 × 8 is low Other end first passage to the 8th passage that photoswitch 3 is lost connects a fiber optic temperature coefficient tested optical fiber 4, six respectively successively The standard single mode or multimode fibre of individual different length and a standard fiber 13,1 × 8 low-loss optically switch 3 third channels The other end to the 7th channel attached standard single mode or multimode fibre is distinguished the identical or different optical fibre fixed-length of connecting length and added Thermal, the fiber optic temperature coefficient tested optical fiber 4 is wound on elongated optical fiber temperature-measurement fixture 6, the elongated optical fiber temperature-measurement folder The standard single mode or multimode fibre of the second channel connection of 6 and 1 × 8 low-loss optically of tool switch 3 may be contained within high/low temperature insulating box 5 Inside, the high/low temperature insulating box 5 and optical fibre fixed-length heater are connected with the system host 1 respectively.
In the present embodiment, the standard single mode or multimode fibre of six different lengths include the first standard single mode or many Mode fiber 7, the second standard single mode or multimode fibre 8, the 3rd standard single mode or multimode fibre 9, the 4th standard single mode or multimode light Fine 10, the 5th standard single mode or multimode fibre 11, the 6th standard single mode or multimode fibre 12;The optical fibre fixed-length heater bag Include the first optical fibre fixed-length heater 14, the second optical fibre fixed-length heater 15, the 3rd optical fibre fixed-length heater 16, the 4th light The fine optical fibre fixed-length heater 18 of fixed length heater 17 and the 5th;
In the present embodiment, first standard single mode or multimode fibre 7 use 0.5km standard single modes or multimode fibre, First standard single mode or multimode fibre 7 are connected with the second channel that 1 × 8 low-loss optically switchs 3;
In the present embodiment, second standard single mode or multimode fibre 8 use 0.5km standard single modes or multimode fibre, Second standard single mode or multimode fibre 8 are connected with the third channel that 1 × 8 low-loss optically switchs 3, second standard single mode Or the other end of multimode fibre 8 is connected with the first optical fibre fixed-length heater 14;
In the present embodiment, the 3rd standard single mode or multimode fibre 9 use 5km standard single modes or multimode fibre, institute State the 3rd standard single mode or multimode fibre 9 and 1 × 8 low-loss optically and switch 3 fourth lane and be connected, the 3rd standard single mode or The other end of multimode fibre 9 is connected with the second optical fibre fixed-length heater 15;
In the present embodiment, the 4th standard single mode or multimode fibre 10 use 10km standard single modes or multimode fibre, 4th standard single mode or multimode fibre 10 are connected with the fourth lane that 1 × 8 low-loss optically switchs 3, the 4th standard list Mould or the other end of multimode fibre 10 are connected with the 3rd optical fibre fixed-length heater 16;
In the present embodiment, the 5th standard single mode or multimode fibre 11 use 20km standard single modes or multimode fibre, Second standard single mode or multimode fibre 8 are connected with the Five-channel that 1 × 8 low-loss optically switchs 3, the 5th standard single mode Or the other end of multimode fibre 11 is connected with the 4th optical fibre fixed-length heater 17;
In the present embodiment, the 6th standard single mode or multimode fibre 12 use 30km standard single modes or multimode fibre, Second standard single mode or multimode fibre 8 are connected with the 6th passage that 1 × 8 low-loss optically switchs 3, the 6th standard single mode Or the other end of multimode fibre 12 is connected with the 5th optical fibre fixed-length heater 18;
In the present embodiment, the standard fiber 13 is using 1km length standards optical fiber 13, the standard fiber 13 and 1 × 8 The 7th passage connection of low-loss optically switch 3.
In the present embodiment, as shown in Fig. 2
The elongated optical fiber temperature-measurement fixture 6 includes elongated optical fiber temperature-measurement jig main body 602, the elongated optical fiber temperature-measurement fixture The two ends of main body 602 are respectively arranged with elongated optical fiber temperature-measurement clamp-support structures 601;
The elongated optical fiber temperature-measurement jig main body 602, typical sizes are diameter 10cm, and length 20cm, thickness of pipe wall is 5mm's Metal tube, tubing matter is aluminium alloy, can carry out heat conduction spraying;
The elongated outer surface of optical fiber temperature-measurement jig main body 602 sets Optical Fiber Winding groove 603, the Optical Fiber Winding groove 603 For spiral semicircle shallow slot, separation 5mm depth 3mm are carved with centimeter scale on groove, wound in groove 0.5m~5m length by light-metering It is fine;Fiber optic temperature coefficient tested optical fiber 4 can be wound along groove, according to the requirement of test experiments, different length is wound in groove Fiber optic temperature coefficient tested optical fiber 4, realizes the winding to 0.5m~5m long optical fibers temperatures coefficient tested optical fiber 4, this fixture is put The thermally equivalent with high/low temperature insulating box 5, can be achieved to be wound fiber optic temperature coefficient tested optical fiber 4 is put, optical fiber is improved and being heated The uniformity, and fiber optic temperature coefficient 4 coiling lengths of tested optical fiber are variable, set of system can carry out different length test optical fiber.
The elongated optical fiber temperature-measurement clamp-support structures 601 are cylindrical structural, the elongated optical fiber temperature-measurement jig main body 602 often end is uniformly arranged the elongated optical fiber temperature-measurement clamp-support structures 601 of four cylindrical structurals, and with it is described elongated The horizontal end face of optical fiber temperature-measurement jig main body 602 is at an angle.
In the present embodiment, as shown in figure 3,
The first optical fibre fixed-length heater 14, the second optical fibre fixed-length heater 15 and the 3rd optical fibre fixed-length heating dress Put 16 and use 1m long optical fibers fixed length heaters, the 4th optical fibre fixed-length heater 17 is using 2m long optical fibers fixed length heating dress Put, the 5th optical fibre fixed-length heater 18 uses 3m long optical fibers fixed length heaters;The 1m long optical fibers fixed length heating dress Put, 2m long optical fibers fixed length heaters and 3m long optical fibers fixed length heaters, its structure includes:
Fixed-length optical fiber heater top board structure 1801 and fixed-length optical fiber heater base arrangement 1802, fixed-length optical fiber adds The material of thermal top board structure 1801 and fixed-length optical fiber heater base arrangement 1802 is insulating heat-conductive material;
It is all provided with the fixed-length optical fiber heater top board structure 1801 and fixed-length optical fiber heater base arrangement 1802 Fixed-length optical fiber heater structure assembling screw 1803 is put, is fixed by screw through screw;The fixed-length optical fiber heating Resistive heater 1804 is set on the end face that device base arrangement 1802 is contacted with fixed-length optical fiber heater top board structure 1801, Heating is provided for fixed-length optical fiber heater;Fixed-length optical fiber is set to fix on the fixed-length optical fiber heater top board structure 1801 Groove 1805, separation 5mm depths 3mm, the fixed-length optical fiber fixing groove 1805, which is used, is carved with a centimetre quarter on spiral semicircle shallow slot, groove Degree, the temperature sensing optical fiber or temperature sensing optical cable of 1m, 2m or 3m length are wound in groove, passes through high-temperature-resistant epoxy resin glue/hot setting Glue or uv-curable glue etc. are adhesively fixed, the fixed-length optical fiber heater top board structure 1801 and fixed-length optical fiber heater bottom If being uniformly arranged dry temperature sensor 1806 on the end face that hardened structure 1802 is contacted, the temperature sensor 1806 and the system Main frame 1 is connected.Temperature feedback is provided for fixed-length optical fiber heater, to realize the temperature stabilization of fixed length optical heating device, is improved Its uniformity.
In the present embodiment, 1m long optical fibers fixed length heaters are made, by the temperature-sensitive light of one section of sensor fibre end 1m length Fibre is put into optical fiber fixing groove, is adhesively fixed along optical fiber using glue such as high temperature setting glues;
2m long optical fibers fixed length heaters are made, the temperature sensing optical fiber of one section of sensor fibre end 2m length is put into optical fiber and fixed Groove, is adhesively fixed along optical fiber using glue such as high temperature setting glues;
3m long optical fibers fixed length heaters are made, the temperature sensing optical fiber of one section of sensor fibre end 3m length optical fiber can be put into and consolidated Determine groove, be adhesively fixed along optical fiber using glue such as high temperature setting glues.
A kind of automatic detection calibration method of ROTDR performance indications, it is automatic that this method is based on a kind of above-mentioned ROTDR performance indications Detection calibration system, the specific steps of this method include:
(1) tested ROTDR2 one end is connected by USB interface or network interface with system host 1, by 1 × 8 low-loss optically The tested ROTDR2 of COM channel fibers access of switch 3 other end;
(2) system host 1 and tested ROTDR2 starts shooting, and judges that the communication between ROTDR2 is tested and be tested to system host 1 It is whether normal, if communication is normal, step (3) is transferred to, if communication failure, step (9) is transferred to;
(3) test function is selected, if the coefficient test of selection fiber optic temperature, is transferred to step (4);If selecting Temperature repeatability to survey Examination, is transferred to step (5);If selecting temperature accuracy test, step (6) is transferred to;If selecting temperature space resolution test, it is transferred to Step (7);If the most long measuring distance index test of selection, is transferred to step (8);
(4) fiber optic temperature coefficient test is carried out, rear output optical fibre temperature coefficient is completed, is transferred to step (9);
(5) Temperature repeatability test is carried out, outputs test result after being completed, is transferred to step (9);
(6) temperature accuracy test is carried out, outputs test result after being completed, is transferred to step (9);
(7) temperature space resolution test is carried out, outputs test result after being completed, is transferred to step (9);
(8) most long measuring distance index test is carried out, outputs test result after being completed, is transferred to step (9);
(9) test terminates.
Further, in the step (4), what fiber optic temperature coefficient was tested concretely comprises the following steps:
The fiber optic temperature coefficient tested optical fiber 4 for needing test temperature coefficient is wrapped in elongated optical fiber temperature-measurement fixture 6 by (4-1) On, coiling length is L, and L is 1m~5m;
(4-2) sets the length L numerical value of fiber optic temperature coefficient tested optical fiber 4, temperature coefficient test temperature in system host 1 Range lower limit TL and temperature coefficient Range of measuring temp upper limit TH, according to temperature coefficient Range of measuring temp lower limit TL and temperature system Number Range of measuring temp upper limit TH difference calculates heating stepping TS according to the TS values meter of table 1:
Table 1
Set test to count I=0, set up and calculate anti-Stokes Raman data and Stokes Raman data ratio array RTZ [0]~[N], TTZ [0]~[N], N round value for (TH-TL)/TS's;
(4-3) system host 1 controls 1 × 8 low-loss optically switch 3 to be switched to first passage, and controls high/low temperature insulating box 5 Temperature reads the temperature data TN of high/low temperature insulating box 5 to TL+TS*I, constantly, as TN=TL+TS*I, the control quilt of system host 1 Survey ROTDR2 and start test, read Temperature Distribution test data MT;
The analysis temperature distribution tests data MT of (4-4) system host 1, reads optical fiber heating region anti-Stokes Raman number According to Stokes Raman data, calculate anti-Stokes Raman data and Stokes Raman data ratio R T, RT be put into Array RTZ [I], TN are put into array TTZ [I];
(4-5) test counts I and adds 1, and the temperature of the control high/low temperature of system host 1 insulating box 5 reads high to TL+TS*I, constantly The temperature data TN of cryostat 5, as TN=TL+TS*I, the tested ROTDR2 of the control of system host 1 starts test, reads temperature Spend distribution tests data MT;
The analysis temperature distribution tests data MT of (4-6) system host 1, reads optical fiber heating region anti-Stokes Raman number According to Stokes Raman data, calculate anti-Stokes Raman data and Stokes Raman data ratio R T, RT be put into Array RTZ [I], TN are put into array TTZ [I];
(4-7) judges whether TN is more than TH, if TN is more than TH, is transferred to step (4-5), otherwise, goes to step (4-8);
RTZ [0]~[N] that (4-8) is obtained according to above-mentioned steps, TTZ [0]~[N], analyze tested optical fiber temperature coefficient.
Further, in the step (5), what Temperature repeatability was tested concretely comprises the following steps:
(5-1) sets Temperature repeatability Range of measuring temp lower limit TL and Temperature repeatability test temperature in system host 1 Range limit TH is spent, temperature range intermediate value TM=(TH+TL)/2 is calculated, sets test to count I=0, the temperature of high/low temperature insulating box 5 TX=TL;
(5-2) system host 1 controls 1 × 8 low-loss optically switch 3 to be switched to second channel, and controls high/low temperature insulating box 5 Temperature reads the temperature data TN of high/low temperature insulating box 5 to TX, constantly, as TN=TX, and the tested ROTDR2 of the control of system host 1 is opened Begin to test, read Temperature Distribution test data MT [I];
(5-3) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (5-2), otherwise, is transferred to Step (5-4);
Temperature averages TLAVE, temperature minimum value TLMIN and temperature in (5-4) calculating MT [0]~MT [19] data are most Big value TLMAX, obtains the Temperature repeatability TLR at a temperature of TL;
(5-5) sets test to count I=0, the temperature TX=TM of high/low temperature insulating box 5 in system host 1;
The temperature of the control high/low temperature of (5-6) system host 1 insulating box 5 reads the temperature data of high/low temperature insulating box 5 to TX, constantly TN, as TN=TX, the tested ROTDR2 of the control of system host 1 starts test, reads Temperature Distribution test data MT [I];
(5-7) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (5-6), otherwise, is transferred to Step (5-8);
Temperature averages TMAVE, temperature minimum value TMMIN and temperature in (5-8) calculating MT [0]~MT [19] data are most Big value TMMAX, obtains the Temperature repeatability TMR at a temperature of TM;
(5-9) sets test to count I=0, the temperature TX=TH of high/low temperature insulating box 5 in system host 1;
The temperature of the control high/low temperature of (5-10) system host 1 insulating box 5 reads the temperature number of high/low temperature insulating box 5 to TX, constantly According to TN, as TN=TX, the tested ROTDR2 of the control of system host 1 starts test, reads Temperature Distribution test data MT [I];
(5-11) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (5-9), otherwise, turns Enter step (5-12);
(5-12) calculates temperature averages THAVE, temperature minimum value THMIN and the temperature in MT [0]~MT [19] data Maximum of T HMAX, obtains the Temperature repeatability THR at a temperature of TH;
Temperature repeatability test value TMR at a temperature of Temperature repeatability test value TLR, TM at a temperature of (5-13) output TL, with And Temperature repeatability test value THR at a temperature of TH.
Further, in the step (6), what temperature accuracy was tested concretely comprises the following steps:
(6-1) sets temperature accuracy Range of measuring temp lower limit TL and temperature accuracy test temperature in system host 1 Range limit TH is spent, temperature range intermediate value TM=(TH+TL)/2 is calculated, sets test to count I=0, the temperature of high/low temperature insulating box 5 TX=TL;
(6-2) system host 1 controls 1 × 8 low-loss optically switch 3 to be switched to second channel, and controls high/low temperature insulating box 5 Temperature reads the temperature data TN of high/low temperature insulating box 5 to TX, constantly, as TN=TX, and the tested ROTDR2 of the control of system host 1 is opened Begin to test, read Temperature Distribution test data MT [I];
(6-3) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (6-2), otherwise, is transferred to Step (6-4);
(6-4) calculates the temperature averages TLAVE and temperature standard difference TLSTD in MT [0]~MT [19] data;
(6-5) sets test to count I=0, the temperature TX=TM of high/low temperature insulating box 5 in system host 1;
The temperature of the control high/low temperature of (6-6) system host 1 insulating box 5 reads the temperature data of high/low temperature insulating box 5 to TX, constantly TN, as TN=TX, the tested ROTDR2 of the control of system host 1 starts test, reads Temperature Distribution test data MT [I];
(6-7) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (6-6), otherwise, is transferred to Step (6-8);
(6-8) calculates the temperature averages TMAVE and temperature standard difference TMSTD in MT [0]~MT [19] data;
(6-9) sets test to count I=0, the temperature TX=TH of high/low temperature insulating box 5 in system host 1;
The temperature of the control high/low temperature of (6-10) system host 1 insulating box 5 reads the temperature number of high/low temperature insulating box 5 to TX, constantly According to TN, as TN=TX, the tested ROTDR2 of the control of system host 1 starts test, reads Temperature Distribution test data MT [I];
(6-11) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (5-9), otherwise, turns Enter step (5-12);
(6-12) calculate MT [0]~MT [19] data in temperature averages THAVE and with temperature standard difference THSTD;
Temperature standard difference TMSTD at a temperature of temperature standard difference TLSTD, TM at a temperature of (6-13) output TL, and TH temperature Lower temperature standard difference THSTD.
Further, in the step (7), temperature space resolution test is concretely comprised the following steps:
(7-1) sets temperature space resolution test temperature range lower limit TL and temperature space to differentiate in system host 1 Rate Range of measuring temp upper limit TH, calculates TM=60 DEG C of temperature range intermediate value, sets the temperature TX=TM of high/low temperature insulating box 5;
(7-2) system host 1 controls 1 × 8 low-loss optically switch 3 to be switched to third channel, and controls 1m long optical fibers fixed length Heating devices heat reads the data TN of 1m long optical fibers fixed length heaters temperature sensor 1806 to TX, constantly, as TN=TX, The tested ROTDR2 of the control of system host 1 starts test, reads Temperature Distribution test data MT;
(7-3) reads the long test data M10 of Temperature Distribution test data MT end 10m;
(7-4) analyzes M10 data crest location MPX, and crest value MPY, from MPX forward searching value closest to 0.9MPY Position MPX9, and value is closest to 0.1MPY position MPX1, calculates temperature space resolution value MSX=MPX9-MPX1;
Temperature space resolution value MSX at a temperature of (7-5) output TM.
Further, in the step (8), most long measuring distance index test is concretely comprised the following steps:
(8-1) set in system host 1 most long measuring distance index test temperature range lower limit TL and most it is long test away from From index test temperature range upper limit TH, TM=60 DEG C of temperature range intermediate value is calculated, the temperature TX=of high/low temperature insulating box 5 is set TM;
(8-2) system host 1 controls 1 × 8 low-loss optically switch 3 to be switched to fourth lane, and controls 1m long optical fibers fixed length Heating devices heat reads the data TN of 1m long optical fibers fixed length heaters temperature sensor 1806 to TX, constantly, as TN=TX, The tested ROTDR2 of the control of system host 1 starts test, reads Temperature Distribution test data MT;
(8-3) reads the optical fiber and heating optical fiber length L4 of fourth lane, reads Temperature Distribution test data MT length L4- The long test data M20 of 20m to 20m between L4, analyze M20 data crests, peak value MPY are obtained, if MPY>It is 50 DEG C, then most long to survey Examination is transferred to step (8-4), otherwise, DM=1000 is transferred to step (8-10) apart from DM=5000;
(8-4) system host 1 controls 1 × 8 low-loss optically switch 3 to be switched to Five-channel, and controls 1m long optical fibers fixed length Heating devices heat reads the data TN of 1m long optical fibers fixed length heaters temperature sensor 1806 to TX, constantly, as TN=TX, The tested ROTDR2 of the control of system host 1 starts test, reads Temperature Distribution test data MT;
(8-5) reads the optical fiber and heating optical fiber length L5 of Five-channel, reads Temperature Distribution test data MT length L5- The long test data M20 of 20m to 20m between L5, analyze M20 data crests, peak value MPY are obtained, if MPY>It is 50 DEG C, then most long to survey Examination is transferred to step (8-6), otherwise, DM=5000 is transferred to step (8-10) apart from DM=10000;
(8-6) system host 1 controls 1 × 8 low-loss optically switch 3 to be switched to the 6th passage, and controls 2m long optical fibers fixed length Heating devices heat reads the data TN of 2m long optical fibers fixed length heaters temperature sensor 1806 to TX, constantly, as TN=TX, The tested ROTDR2 of the control of system host 1 starts test, reads Temperature Distribution test data MT;
(8-7) reads the optical fiber and heating optical fiber length L6 of the 6th passage, reads Temperature Distribution test data MT length L6- The long test data M20 of 20m to 20m between L6, analyze M20 data crests, peak value MPY are obtained, if MPY>It is 50 DEG C, then most long to survey Examination is transferred to step (8-8), otherwise, DM=10000 is transferred to step (8-10) apart from DM=20000;
(8-8) system host 1 controls 1 × 8 low-loss optically switch 3 to be switched to the 7th passage, and controls 3m long optical fibers fixed length Heating devices heat reads the data TN of 3m long optical fibers fixed length heaters temperature sensor 1806 to TX, constantly, as TN=TX, The tested ROTDR2 of the control of system host 1 starts test, reads Temperature Distribution test data MT;
(8-9) reads the optical fiber and heating optical fiber length L7 of the 7th passage, reads Temperature Distribution test data MT length L7- The long test data M20 of 20m to 20m between L7, analyze M20 data crests, peak value MPY are obtained, if MPY>It is 50 DEG C, then most long to survey Examination is apart from DM=30000, otherwise, DM=20000;
Most long measuring distance DM at a temperature of (8-10) output TM.
Compared with prior art, beneficial effects of the present invention:
The present invention proposes a kind of ROTDR performance indications automatic test and calibration system and method, and the system is comprising a kind of small The elongated optical fiber temperature-measurement fixture 6 of type and optical fibre fixed-length heater, this method is based on spatial discrimination of the system to ROTDR equipment The automatic survey of the Key Performance Indicators such as rate index, temperature measurement accuracy index, thermometric repeatability index, measurement length accuracy index Examination, reduces the difficulty and complexity of ROTDR equipment detection calibrations, and lifting ROTDR develops, produces and examined equipment during use Detection calibration efficiency, improves production efficiency, while due to the survey of manual operation introducing during reducing manually detection calibration Error is tried, detection calibration precision is lifted.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, the application the foregoing is only Preferred embodiment, not limiting the scope of the invention, for those skilled in the art, the application can To there is various modifications and variations.One of ordinary skill in the art should be understood that on the basis of technical scheme, this area Technical staff need not pay the various modifications that creative work can make, equivalent substitution or deformation still in the protection of the present invention Within scope.

Claims (10)

1. a kind of ROTDR performance indications automatic test and calibration system, it is characterized in that:The system includes:
System host, the tested ROTDR of system host connection, is controlled to tested ROTDR, is tested ROTDR optical interface Connect the COM ends of 1 × 8 low-loss optically switch, the other end first passage of 1 × 8 low-loss optically switch to the 8th passage according to It is secondary to connect fiber optic temperature coefficient tested optical fiber, the standard single mode or multimode fibre and a standard of six different lengths respectively Optical fiber, 1 × 8 low-loss optically switchs third channel to the other end point of the 7th channel attached standard single mode or multimode fibre The identical or different optical fibre fixed-length heater of other connecting length, the fiber optic temperature coefficient tested optical fiber is wound in change long optical fibers On temperature measuring clamp, the standard single mode or many of the second channel connection of elongated optical fiber temperature-measurement fixture and 1 × 8 the low-loss optically switch Mode fiber may be contained within inside high/low temperature insulating box, the high/low temperature insulating box and optical fibre fixed-length heater respectively with the system Main frame of uniting is connected.
2. a kind of ROTDR performance indications automatic test and calibration system as claimed in claim 1, it is characterized in that:Described six are not With length standard single mode or multimode fibre include the first standard single mode or multimode fibre, the second standard single mode or multimode fibre, 3rd standard single mode or multimode fibre, the 4th standard single mode or multimode fibre, the 5th standard single mode or multimode fibre, the 6th standard Single mode or multimode fibre;The optical fibre fixed-length heater includes the first optical fibre fixed-length heater, the second optical fibre fixed-length and heated Device, the 3rd optical fibre fixed-length heater, the 4th optical fibre fixed-length heater and the 5th optical fibre fixed-length heater.
3. a kind of ROTDR performance indications automatic test and calibration system as claimed in claim 1, it is characterized in that:The elongated light Fine temperature measuring clamp includes elongated optical fiber temperature-measurement jig main body, and the elongated optical fiber temperature-measurement jig main body two ends are respectively arranged with elongated Optical fiber temperature-measurement clamp-support structures;
The elongated optical fiber temperature-measurement jig main body is metallic tube-shaped structure, and the elongated optical fiber temperature-measurement jig main body outer surface is set Optical Fiber Winding groove, the Optical Fiber Winding groove is to be carved with centimeter scale on spiral semicircle shallow slot, groove, and 0.5m~5m length is wound in groove The tested optical fiber of degree;The elongated optical fiber temperature-measurement clamp-support structures are cylindrical structural, the elongated optical fiber temperature-measurement fixture master The often end of body is uniformly arranged the elongated optical fiber temperature-measurement clamp-support structures of four cylindrical structurals, and with the change long optical fibers The horizontal end face of temperature measuring clamp main body is at an angle.
4. a kind of ROTDR performance indications automatic test and calibration system as claimed in claim 1, it is characterized in that:First light Fine fixed length heater, the second optical fibre fixed-length heater and the 3rd optical fibre fixed-length heater are heated using 1m long optical fibers fixed length Device, the 4th optical fibre fixed-length heater uses 2m long optical fibers fixed length heaters, the 5th optical fibre fixed-length heating dress Put using 3m long optical fibers fixed length heaters;The 1m long optical fibers fixed length heater, 2m long optical fibers fixed length heaters and 3m Long optical fibers fixed length heater, its structure includes:
Fixed-length optical fiber heater top board structure and fixed-length optical fiber heater base arrangement, the fixed-length optical fiber heater top Fixed-length optical fiber heater structure assembling screw is respectively provided with hardened structure and fixed-length optical fiber heater base arrangement, passes through screw It is fixed through screw;The fixed-length optical fiber heater base arrangement is contacted with fixed-length optical fiber heater top board structure Resistive heater is set on end face;Fixed-length optical fiber fixing groove is set on the fixed-length optical fiber heater top board structure, it is described fixed Long optical fibers fixing groove is used and is carved with centimeter scale on spiral semicircle shallow slot, groove, and the temperature-sensitive light of 1m, 2m or 3m length is wound in groove Fine or temperature sensing optical cable, and be adhesively fixed, the fixed-length optical fiber heater top board structure and fixed-length optical fiber heater bottom If being uniformly arranged dry temperature sensor on the end face of plate form touch, the temperature sensor is connected with the system host.
5. a kind of automatic detection calibration method of ROTDR performance indications, this method is based on one kind as described in claim 1-4 is any ROTDR performance indications automatic test and calibration systems, the specific steps of this method include:
(1) tested ROTDR one end is connected by USB interface or network interface with system host, 1 × 8 low-loss optically is switched The tested ROTDR of the COM channel fibers access other end;
(2) system host is started shooting with tested ROTDR, judges whether system host test and the communication being tested between ROTDR are normal, If communication is normal, step (3) is transferred to, if communication failure, step (9) is transferred to;
(3) test function is selected, if the coefficient test of selection fiber optic temperature, is transferred to step (4);If selecting Temperature repeatability test, It is transferred to step (5);If selecting temperature accuracy test, step (6) is transferred to;If selecting temperature space resolution test, step is transferred to Suddenly (7);If the most long measuring distance index test of selection, is transferred to step (8);
(4) fiber optic temperature coefficient test is carried out, rear output optical fibre temperature coefficient is completed, is transferred to step (9);
(5) Temperature repeatability test is carried out, outputs test result after being completed, is transferred to step (9);
(6) temperature accuracy test is carried out, outputs test result after being completed, is transferred to step (9);
(7) temperature space resolution test is carried out, outputs test result after being completed, is transferred to step (9);
(8) most long measuring distance index test is carried out, outputs test result after being completed, is transferred to step (9);
(9) test terminates.
6. a kind of automatic detection calibration method of ROTDR performance indications as claimed in claim 5, it is characterized in that:The step (4) In, what fiber optic temperature coefficient was tested concretely comprises the following steps:
The fiber optic temperature coefficient tested optical fiber for needing test temperature coefficient is wrapped on elongated optical fiber temperature-measurement fixture by (4-1), is twined It is L around length, L is 1m~5m;
(4-2) is set under fiber optic temperature coefficient tested optical fiber length L numerical value, temperature coefficient Range of measuring temp in system host TL and temperature coefficient Range of measuring temp upper limit TH is limited, is tested according to temperature coefficient Range of measuring temp lower limit TL and temperature coefficient Temperature range upper limit TH mathematic interpolation heating stepping TS:
T S = 10 , T H - T L &GreaterEqual; 200 5 , 100 &le; T H - T L < 200 2 , 100 < T H - T L &le; 50 1 , T H - T L < 50
Set test to count I=0, set up and calculate anti-Stokes Raman data and Stokes Raman data ratio array RTZ [0]~[N], TTZ [0]~[N], N round value for (TH-TL)/TS's;
(4-3) system host controls 1 × 8 low-loss optically switch to be switched to first passage, and controls high/low temperature calorstat temperature extremely TL+TS*I, constantly reads high/low temperature calorstat temperature data TN, as TN=TL+TS*I, the tested ROTDR of system host control Start test, read Temperature Distribution test data MT;
(4-4) system host analysis temperature distribution tests data MT, read optical fiber heating region anti-Stokes Raman data with Stokes Raman data, calculate anti-Stokes Raman data and Stokes Raman data ratio R T, RT are put into array RTZ [I], TN are put into array TTZ [I];
(4-5) test counts I and adds 1, and system host controls high/low temperature calorstat temperature to TL+TS*I, constantly reads high/low temperature permanent Temperature of Warm Case data TN, as TN=TL+TS*I, the tested ROTDR of system host control starts test, reads Temperature Distribution test Data MT;
(4-6) system host analysis temperature distribution tests data MT, read optical fiber heating region anti-Stokes Raman data with Stokes Raman data, calculate anti-Stokes Raman data and Stokes Raman data ratio R T, RT are put into array RTZ [I], TN are put into array TTZ [I];
(4-7) judges whether TN is more than TH, if TN is more than TH, is transferred to step (4-5), otherwise, goes to step (4-8);
RTZ [0]~[N] that (4-8) is obtained according to above-mentioned steps, TTZ [0]~[N], analyze tested optical fiber temperature coefficient.
7. a kind of automatic detection calibration method of ROTDR performance indications as claimed in claim 5, it is characterized in that:The step (5) In, what Temperature repeatability was tested concretely comprises the following steps:
(5-1) sets Temperature repeatability Range of measuring temp lower limit TL and Temperature repeatability Range of measuring temp in system host Upper limit TH, calculates temperature range intermediate value TM=(TH+TL)/2, sets test to count I=0, high/low temperature calorstat temperature TX=TL;
(5-2) system host controls 1 × 8 low-loss optically switch to be switched to second channel, and controls high/low temperature calorstat temperature extremely TX, constantly reads high/low temperature calorstat temperature data TN, as TN=TX, and the tested ROTDR of system host control starts test, reads Take Temperature Distribution test data MT [I];
(5-3) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (5-2), otherwise, is transferred to step (5-4);
(5-4) calculates temperature averages TLAVE, temperature minimum value TLMIN and the temperature maximum in MT [0]~MT [19] data TLMAX, obtains the Temperature repeatability TLR at a temperature of TL;
(5-5) sets test to count I=0, high/low temperature calorstat temperature TX=TM in system host;
(5-6) system host controls high/low temperature calorstat temperature to TX, constantly reads high/low temperature calorstat temperature data TN, works as TN During=TX, the tested ROTDR of system host control starts test, reads Temperature Distribution test data MT [I];
(5-7) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (5-6), otherwise, is transferred to step (5-8);
(5-8) calculates temperature averages TMAVE, temperature minimum value TMMIN and the temperature maximum in MT [0]~MT [19] data TMMAX, obtains the Temperature repeatability TMR at a temperature of TM;
(5-9) sets test to count I=0, high/low temperature calorstat temperature TX=TH in system host;
(5-10) system host controls high/low temperature calorstat temperature to TX, constantly reads high/low temperature calorstat temperature data TN, when During TN=TX, the tested ROTDR of system host control starts test, reads Temperature Distribution test data MT [I];
(5-11) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (5-9), otherwise, is transferred to step Suddenly (5-12);
(5-12) calculates temperature averages THAVE, temperature minimum value THMIN and the maximum temperature in MT [0]~MT [19] data Value THMAX, obtains the Temperature repeatability THR at a temperature of TH;
Temperature repeatability test value TMR at a temperature of Temperature repeatability test value TLR, TM at a temperature of (5-13) output TL, and TH At a temperature of Temperature repeatability test value THR.
8. a kind of automatic detection calibration method of ROTDR performance indications as claimed in claim 5, it is characterized in that:The step (6) In, what temperature accuracy was tested concretely comprises the following steps:
(6-1) sets temperature accuracy Range of measuring temp lower limit TL and temperature accuracy Range of measuring temp in system host Upper limit TH, calculates temperature range intermediate value TM=(TH+TL)/2, sets test to count I=0, high/low temperature calorstat temperature TX=TL;
(6-2) system host controls 1 × 8 low-loss optically switch to be switched to second channel, and controls high/low temperature calorstat temperature extremely TX, constantly reads high/low temperature calorstat temperature data TN, as TN=TX, and the tested ROTDR of system host control starts test, reads Take Temperature Distribution test data MT [I];
(6-3) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (6-2), otherwise, is transferred to step (6-4);
(6-4) calculates the temperature averages TLAVE and temperature standard difference TLSTD in MT [0]~MT [19] data;
(6-5) sets test to count I=0, high/low temperature calorstat temperature TX=TM in system host;
(6-6) system host controls high/low temperature calorstat temperature to TX, constantly reads high/low temperature calorstat temperature data TN, works as TN During=TX, the tested ROTDR of system host control starts test, reads Temperature Distribution test data MT [I];
(6-7) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (6-6), otherwise, is transferred to step (6-8);
(6-8) calculates the temperature averages TMAVE and temperature standard difference TMSTD in MT [0]~MT [19] data;
(6-9) sets test to count I=0, high/low temperature calorstat temperature TX=TH in system host;
(6-10) system host controls high/low temperature calorstat temperature to TX, constantly reads high/low temperature calorstat temperature data TN, when During TN=TX, the tested ROTDR of system host control starts test, reads Temperature Distribution test data MT [I];
(6-11) test counts I values and Jia 1, judges whether I is less than 20, if I is less than 20, is transferred to step (5-9), otherwise, is transferred to step Suddenly (5-12);
(6-12) calculate MT [0]~MT [19] data in temperature averages THAVE and with temperature standard difference THSTD;
Temperature standard difference TMSTD at a temperature of temperature standard difference TLSTD, TM at a temperature of (6-13) output TL, and temperature at a temperature of TH Spend standard deviation THSTD.
9. a kind of automatic detection calibration method of ROTDR performance indications as claimed in claim 5, it is characterized in that:The step (7) In, temperature space resolution test is concretely comprised the following steps:
(7-1) sets temperature space resolution test temperature range lower limit TL and temperature space resolution test in system host Temperature range upper limit TH, calculates TM=60 DEG C of temperature range intermediate value, sets high/low temperature calorstat temperature TX=TM;
(7-2) system host controls 1 × 8 low-loss optically switch to be switched to third channel, and controls 1m long optical fibers fixed length heating dress Put and be heated to TX, constantly read 1m long optical fibers fixed length heater temperature sensor data TN, as TN=TX, system host control The tested ROTDR of system starts test, reads Temperature Distribution test data MT;
(7-3) reads the long test data M10 of Temperature Distribution test data MT end 10m;
(7-4) analyzes M10 data crest location MPX, and crest value MPY, from MPX forward searching value closest to 0.9MPY position MPX9, and value are put closest to 0.1MPY position MPX1, temperature space resolution value MSX=MPX9-MPX1 is calculated;
Temperature space resolution value MSX at a temperature of (7-5) output TM.
10. a kind of automatic detection calibration method of ROTDR performance indications as claimed in claim 5, it is characterized in that:The step (8) in, most long measuring distance index test is concretely comprised the following steps:
(8-1) sets most long measuring distance index test temperature range lower limit TL and most long measuring distance index in system host Range of measuring temp upper limit TH, calculates TM=60 DEG C of temperature range intermediate value, sets high/low temperature calorstat temperature TX=TM;
(8-2) system host controls 1 × 8 low-loss optically switch to be switched to fourth lane, and controls 1m long optical fibers fixed length heating dress Put and be heated to TX, constantly read 1m long optical fibers fixed length heater temperature sensor data TN, as TN=TX, system host control The tested ROTDR of system starts test, reads Temperature Distribution test data MT;
(8-3) reads the optical fiber and heating optical fiber length L4 of fourth lane, reads Temperature Distribution test data MT length L4-20m To the long test data M20 of 20m between L4, M20 data crests are analyzed, peak value MPY are obtained, if MPY>50 DEG C, then most long test Apart from DM=5000, step (8-4) is transferred to, otherwise, DM=1000 is transferred to step (8-10);
(8-4) system host controls 1 × 8 low-loss optically switch to be switched to Five-channel, and controls 1m long optical fibers fixed length heating dress Put and be heated to TX, constantly read 1m long optical fibers fixed length heater temperature sensor data TN, as TN=TX, system host control The tested ROTDR of system starts test, reads Temperature Distribution test data MT;
(8-5) reads the optical fiber and heating optical fiber length L5 of Five-channel, reads Temperature Distribution test data MT length L5-20m To the long test data M20 of 20m between L5, M20 data crests are analyzed, peak value MPY are obtained, if MPY>50 DEG C, then most long test Apart from DM=10000, step (8-6) is transferred to, otherwise, DM=5000 is transferred to step (8-10);
(8-6) system host controls 1 × 8 low-loss optically switch to be switched to the 6th passage, and controls 2m long optical fibers fixed length heating dress Put and be heated to TX, constantly read 2m long optical fibers fixed length heater temperature sensor data TN, as TN=TX, system host control The tested ROTDR of system starts test, reads Temperature Distribution test data MT;
(8-7) reads the optical fiber and heating optical fiber length L6 of the 6th passage, reads Temperature Distribution test data MT length L6-20m To the long test data M20 of 20m between L6, M20 data crests are analyzed, peak value MPY are obtained, if MPY>50 DEG C, then most long test Apart from DM=20000, step (8-8) is transferred to, otherwise, DM=10000 is transferred to step (8-10);
(8-8) system host controls 1 × 8 low-loss optically switch to be switched to the 7th passage, and controls 3m long optical fibers fixed length heating dress Put and be heated to TX, constantly read 3m long optical fibers fixed length heater temperature sensor data TN, as TN=TX, system host control The tested ROTDR of system starts test, reads Temperature Distribution test data MT;
(8-9) reads the optical fiber and heating optical fiber length L7 of the 7th passage, reads Temperature Distribution test data MT length L7-20m To the long test data M20 of 20m between L7, M20 data crests are analyzed, peak value MPY are obtained, if MPY>50 DEG C, then most long test Apart from DM=30000, otherwise, DM=20000;
Most long measuring distance DM at a temperature of (8-10) output TM.
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