CN106652722B - A kind of portable distributed fiber optic temperature strains compound apparatus for demonstrating and demenstration method - Google Patents
A kind of portable distributed fiber optic temperature strains compound apparatus for demonstrating and demenstration method Download PDFInfo
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- CN106652722B CN106652722B CN201611024638.4A CN201611024638A CN106652722B CN 106652722 B CN106652722 B CN 106652722B CN 201611024638 A CN201611024638 A CN 201611024638A CN 106652722 B CN106652722 B CN 106652722B
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Abstract
The invention discloses a kind of portable distributed fiber optic temperatures to strain compound apparatus for demonstrating and demenstration method；Including optical-fiber deformation pipe, the both ends of the optical-fiber deformation pipe are respectively connect with an apparatus for demonstrating fixing end, and apparatus for demonstrating fixing end is fixed on foldable tripod, and the optical-fiber deformation pipe is equipped with counterweight hook load-bearing plate, and counterweight hook load-bearing plate is connect with counterweight；The optical-fiber deformation inside pipe wall is equipped with resistive heater and temperature sensor, and resistive heater and temperature sensor are all connect with demonstration temperature controller, and the optical-fiber deformation pipe internal surface is additionally provided with optical fiber laying groove and lower optical fiber laying groove.The present invention had both facilitated application deformation, the optical-fiber deformation pipe that can also be heated simultaneously realizes the compound generation strained in distributing optical fiber sensing with temperature, the defect of strain variation or temperature change can only individually be demonstrated by overcoming traditional apparatus for demonstrating, can intuitively demonstrate BOTDR/ROTDR distributed sensor to the Perception Features of strain, temperature.
Description
Technical field
The present invention relates to a kind of portable distributed fiber optic temperatures to strain compound apparatus for demonstrating and demenstration method.
Background technique
In optical fiber sensing system, distributive fiber optic strain tester (abbreviation BOTDR), distributed fiber temperature measuring device
(abbreviation ROTDR) is two class distributed fiberoptic sensors most important, that market prospects are most wide.The strain of BOTDR test optical fiber
Distribution can be used for dam, high-speed rail, electric power, pile, tunnel, the health monitoring of oil-gas pipeline and Landslide Hazards
The fields such as prevention, have a extensive future, market potential is huge.And the temperature distribution state of ROTDR test optical fiber, it can be widely applied
It is huge in fields, development potentialities such as all kinds of buildings, geotechnical engineering, storage tank farm, gas storage, the fire prevention of oil-gas pipeline, temperature pre-warnings.
In its use process, since test philosophy limits, the test result of BOTDR is both by optical fiber strain shadow sound or light
Fine temperature influences, and the test result of ROTDR is only affected by temperature not strained influence, due to spontaneous brillouin scattering signal and
Spontaneous Raman scattering signal is all very faint, at present the spatial resolution index of BOTDR and ROTDR product all >=1m, it is desirable that drill
Showing device must be able to apply deformation or temperature change to the optical fiber more than 1m length, instrument could be enabled accurately to test out demonstration existing
As.In traditional demonstration scheme, the apparatus for demonstrating that BOTDR is used all only by strain as variable quantity, passes through stretching, bending deformation
Etc. modes enable optical fiber generate strain, have ignored the influence of variation of ambient temperature, lead to not demonstrate temperature-compensating to BOTDR test
As a result influence, and test result is caused to be easy the variation by environment temperature and influence demonstrating effect；And ROTDR is drilled
Showing device then all uses temperature as variable quantity, only demonstrates ROTDR test result variation with temperature, can not demonstrate ROTDR
To the insensitive of strain variation, BOTDR and ROTDR are limited in strain and characterization when temperature composite test, shadow
The popularization and application of distributing optical fiber sensing equipment are rung.
Summary of the invention
The purpose of the present invention is to solve the above-mentioned problems, and it is compound to provide a kind of portable distributed fiber optic temperature strain
Apparatus for demonstrating and demenstration method realize the compound generation and demonstration of distributive fiber optic strain and temperature.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of compound apparatus for demonstrating of portable distributed fiber optic temperature strain, including optical-fiber deformation pipe, the optical-fiber deformation
The both ends of pipe are respectively connect with an apparatus for demonstrating fixing end, and the apparatus for demonstrating fixing end is fixed on foldable tripod, institute
Optical-fiber deformation pipe is stated equipped with counterweight hook load-bearing plate, counterweight hook load-bearing plate is connect with counterweight；
The optical-fiber deformation inside pipe wall is coated with high-temperature-resistant insulating paint, and is equipped with resistive heater and temperature sensor,
Resistive heater and temperature sensor are all connect with demonstration temperature controller, and the outer surface of the optical-fiber deformation pipe is additionally provided with glazing
Fine laying groove and lower optical fiber laying groove.
It is laid in the upper optical fiber laying groove and pastes and answer darkening when demonstration optical fiber is squeezed deformation and generates negative strain
Fine or optical cable and temperature optical cable, when being laid with and paste demonstration optical fiber tension stretching strain and generate normal strain in lower optical fiber laying groove
Strain optical fiber or optical cable and temperature optical cable.
The apparatus for demonstrating fixing end includes into cylindrical fixation end housing, one end of fixed end housing and optical-fiber deformation
Pipe is connected by fixing threaded hole, and the other end is connected and fixed end protection cap.
It sets in the fixing end protection cap there are four ring flange, is additionally provided with and is connect with resistive heater and temperature sensor
Electric interfaces.
The threaded hole that the fixed end housing is equipped with the threaded hole of fixed protection cap and connect with foldable tripod.
The optical-fiber deformation pipe be metal hollow pipe, optical-fiber deformation length of tube should between 1m~1.6m, it is easy to carry or
Mailing, diameter are greater than 2cm.
The demenstration method of compound apparatus for demonstrating is strained using a kind of portable distributed fiber optic temperature, comprising:
Step 101: straining sensing optical cable or optical fiber that two both ends optical interfaces are FC interface being tensed into stickup respectively and fixed
Into upper optical fiber laying groove and lower optical fiber laying groove；
Step 102: by two with the length of straining sensing optical cable in step 101 or optical fiber same, both ends optical interface
It is pasted respectively for the temperature sensing optic cable of FC interface fixed in vacant upper optical fiber laying groove and lower optical fiber laying groove；
Step 103；By one of strain sensing optical fiber cable or optical fiber and temperature sensing optic cable in upper optical fiber laying groove
It holds in optical interface access apparatus for demonstrating fixing end；
Step 104；By one of strain sensing optical fiber cable or optical fiber and temperature sensing optic cable in lower optical fiber laying groove
End optical interface also accesses in apparatus for demonstrating fixing end；
Step 105: the wire welding of resistive heater and temperature sensor in optical-fiber deformation pipe is fixed to apparatus for demonstrating
On end；
Step 106: optical-fiber deformation pipe is fixed in apparatus for demonstrating fixing end；
Step 107: apparatus for demonstrating fixing end being fixed on and carries out demonstrating temperature-resistant, strain variation on foldable tripod
When data variation characteristic；Temperature change, the variation characteristic of data when straining constant；Data when temperature and strain change simultaneously
Variation characteristic.
Step more than needing to carry out before first use.
It is further comprising the steps of before being demonstrated in the step 107:
Step 701, two foldable tripods are opened, are fixed the apparatus for demonstrating at both ends using two foldable tripods
End and optical-fiber deformation pipe are supported, and keep optical-fiber deformation pipe horizontal；
Step 702: by optical patchcord or switching optical fiber respectively by answering in upper optical fiber laying groove and lower optical fiber laying groove
In the photoswitch that darkening fibre or optical cable and the access of temperature optical cable are connect with BOTDR；
Step 703: temperature controller is connect with resistive heater and temperature sensor.
To be demonstrated using BOTDR temperature-resistant, the specific method of the variation characteristic of data is when strain variation,
Step A201: by BOTDR in upper optical fiber laying groove and lower optical fiber laying groove strain optical fiber or optical cable and
Temperature optical cable is tested, and trip temperature compensation calculation of going forward side by side obtains optical fiber laying groove internal strain optical fiber or optical cable and temperature
Strain data SUT0, temperature data TUT0 at a temperature of optical cable room temperature T0, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature
Strain data SDT0, temperature data TDT0 at a temperature of degree optical cable room temperature T0；
Step A202: increasing counterweight on counterweight hook load-bearing plate, and counterweight weight W0 is laid with upper optical fiber by BOTDR
The strain optical fiber or optical cable and temperature optical cable of slot and lower optical fiber laying groove are tested, and trip temperature compensation calculation of going forward side by side obtains
Strain data SUW0T0, temperature data at a temperature of upper optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable room temperature T0
Strain data SDW0T0, temperature at a temperature of TUW0T0, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable room temperature T0
Degree is according to TDW0T0；
Step A203: compare data SUT0, SUW0T0, TUT0, TUW0T0, SDT0, SDW0T0, TDT0, TDW0T0, demonstration
It is temperature-resistant, the variation characteristic of data when strain variation.
Temperature change, the variation characteristic of data when straining constant are demonstrated using BOTDR method particularly includes:
Step A301: by BOTDR in upper optical fiber laying groove and lower optical fiber laying groove strain optical fiber or optical cable and
Temperature optical cable is tested, and trip temperature compensation calculation of going forward side by side obtains optical fiber laying groove internal strain optical fiber or optical cable and temperature
Strain data SUW0T0, temperature data TUW0T0 at a temperature of optical cable room temperature T0, lower optical fiber laying groove internal strain optical fiber or optical cable with
And strain data SDW0T0, temperature data TDW0T0 at a temperature of temperature optical cable room temperature T0；
Step A302；It is T1, waiting temperature controller prompt temperature using demonstration temperature controller setting apparatus for demonstrating temperature
After degree is stablized, by BOTDR to the strain optical fiber or optical cable and temperature optical cable in upper optical fiber laying groove and lower optical fiber laying groove
It is tested, trip temperature compensation calculation of going forward side by side, obtains optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable T1 temperature
Lower strain data SUW0T1, temperature data TUW0T1, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable T1 temperature
Spend lower strain data SDW0T1, temperature data TDW0T1；
Step A303: comparing data SUW0T0, SUW0T1, TUW0T0, TUW0T1, SDW0T0, SDW0T1, TDW0T0,
TDW0T1 demonstrates temperature change, the variation characteristic of data when straining constant；
The variation characteristic of data when being changed simultaneously using BOTDR demonstration temperature and strain method particularly includes:
Step A401: by BOTDR in upper optical fiber laying groove and lower optical fiber laying groove strain optical fiber or optical cable and
Temperature optical cable is tested, and trip temperature compensation calculation of going forward side by side obtains optical fiber laying groove internal strain optical fiber or optical cable and temperature
Strain data SUW0T0, temperature data TUW0T0 at a temperature of optical cable room temperature T0, lower optical fiber laying groove internal strain optical fiber or optical cable with
And strain data SDW0T0, temperature data TDW0T0 at a temperature of temperature optical cable room temperature T0；
Step A402: changing counterweight weight on counterweight hook load-bearing plate, and counterweight weight W1 is set using demonstration temperature controller
Setting apparatus for demonstrating temperature is T1, after waiting temperature controller temperature indicator is stablized, by BOTDR to upper optical fiber laying groove and lower light
Strain optical fiber or optical cable and temperature optical cable in fine laying groove are tested, and trip temperature compensation calculation of going forward side by side obtains optical fiber
Strain data SUW1T1, temperature data TUW1T1 at a temperature of laying groove internal strain optical fiber or optical cable and temperature optical cable T1, lower light
Strain data SDW1T1, temperature data TDW1T1 at a temperature of fine laying groove internal strain optical fiber or optical cable and temperature optical cable T1；
Step A403: comparing data SUW0T0, SUW1T1, TUW0T0, TUW1T1, SDW0T0, SDW1T1, TDW0T0,
The variation characteristic of data when TDW1T1, demonstration temperature and strain change simultaneously.
Temperature change, the variation characteristic of temperature measurement data when straining constant are demonstrated using ROTDR method particularly includes:
Step B301: by ROTDR in upper optical fiber laying groove and lower optical fiber laying groove strain optical fiber or optical cable and
Temperature optical cable is tested, and trip temperature compensation calculation of going forward side by side obtains optical fiber laying groove internal strain optical fiber or optical cable and temperature
Temperature data SUW0T0, TUW0T0 at a temperature of optical cable room temperature T0, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature light
Temperature data SDW0T0, TDW0T0 at a temperature of cable room temperature T0；
Step B302；It is T1, waiting temperature controller prompt temperature using demonstration temperature controller setting apparatus for demonstrating temperature
After degree is stablized, by ROTDR to the strain optical fiber or optical cable and temperature optical cable in upper optical fiber laying groove and lower optical fiber laying groove
Tested, obtain temperature data TSUW0T1 at a temperature of optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable T1,
Temperature data TSDW0T1 at a temperature of TTUW0T1, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable T1,
TTDW0T1；
Step B303: comparing data TSUW0T0, TSUW0T1, TTUW0T0, TTUW0T1, TSDW0T0, TSDW0T1,
TTDW0T0, TTDW0T1 demonstrate temperature change, the variation characteristic of ROTDR temperature measurement data when straining constant；
The variation characteristic of data when being changed simultaneously using ROTDR demonstration temperature and strain method particularly includes:
Step B401: by ROTDR in upper optical fiber laying groove and lower optical fiber laying groove strain optical fiber or optical cable and
Temperature optical cable is tested, and trip temperature compensation calculation of going forward side by side obtains optical fiber laying groove internal strain optical fiber or optical cable and temperature
Temperature data TSUW0T0, TTUW0T0 at a temperature of optical cable room temperature T0, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature
Temperature data TSDW0T0, TTDW0T0 at a temperature of optical cable room temperature T0；
Step B402: changing counterweight weight on counterweight hook load-bearing plate, and counterweight weight W1 is set using demonstration temperature controller
Setting apparatus for demonstrating temperature is T1, after waiting temperature controller temperature indicator is stablized, by ROTDR to upper optical fiber laying groove and lower light
Strain optical fiber or optical cable and temperature optical cable in fine laying groove are tested, and optical fiber laying groove internal strain optical fiber or light are obtained
Temperature data TSUW1T1, TTUW1T1 at a temperature of cable and temperature optical cable T1, lower optical fiber laying groove internal strain optical fiber or optical cable with
And temperature data TSDW1T1, TTDW1T1 at a temperature of temperature optical cable T1；
Step B403: comparing data TSUW0T0, TSUW1T1, TTUW0T0, TTUW1T1, TSDW0T0, TSDW1T1,
The variation characteristic of data when TTDW0T0, TTDW1T1, demonstration temperature and strain change simultaneously.
Beneficial effects of the present invention:
(1) the compound generation and demonstration of distributive fiber optic strain and temperature are realized；
(2) temperature-compensating result during BOTDR strain testing can be visually demonstrated, it can also be to ROTDR temperature
The characteristic of the degree not strained influence of test process is demonstrated；
(3) apparatus for demonstrating installing and dismounting is simple, and demonstration is efficient and convenient, convenient for mailing and carries, further reduced distribution
The popularization difficulty of formula fibre optical sensor.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is optical-fiber deformation pipe schematic diagram；
Fig. 3 (a) is apparatus for demonstrating fixing end (fixing end protection cap is housed) schematic diagram, and Fig. 3 (b) is apparatus for demonstrating fixing end
(no fixing end protection cap) schematic diagram, Fig. 3 (c) are after apparatus for demonstrating fixing end to schematic diagram；
Fig. 4 is structural schematic diagram when being demonstrated using BOTDR.
Fig. 5 is structural schematic diagram when being demonstrated using ROTDR.
Wherein, 1. optical-fiber deformation pipe, 2. apparatus for demonstrating fixing ends, 3. foldable tripods, 4. counterweight hook load-bearing plates, 5.
Counterweight；
The upper optical fiber laying groove of 1a, optical fiber laying groove under 1b, 1c optical-fiber deformation pipe mounting hole；
2a fixes end housing；2b fixing end protection cap；2c upper flange plate；2d lower flange；The screw thread of the fixed protection cap of 2e
Hole；2f electric interfaces；The threaded hole that 2g is connect with foldable tripod；The screw hole of the fixed optical-fiber deformation pipe of 2h.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
As shown in Figure 1, a kind of portable distributed fiber optic temperature strains compound apparatus for demonstrating, including optical-fiber deformation pipe 1, institute
The both ends for stating optical-fiber deformation pipe are respectively connect with an apparatus for demonstrating fixing end 2, and the apparatus for demonstrating fixing end 2 is fixed on foldable
On tripod 3, the optical-fiber deformation pipe 1 is equipped with counterweight hook load-bearing plate 4, and counterweight hook load-bearing plate 4 is connect with counterweight 5；
As shown in Fig. 2, optical-fiber deformation pipe is metal hollow pipe, optical-fiber deformation length of tube is greater than 1m, representative value 1.5m, directly
Diameter is greater than 2cm, representative value 3cm, and 1 inner wall of optical-fiber deformation pipe is equipped with resistive heater and temperature sensor, for anti-
Optical-fiber deformation tube temperature degree is presented, resistive heater and temperature sensor are all connect with demonstration temperature controller, the optical-fiber deformation pipe
Inner surface is additionally provided with optical fiber laying groove 1a and lower optical fiber laying groove 1b.
The strain optical fiber that is laid in the upper optical fiber laying groove 1a when demonstration optical fiber is squeezed deformation and generates negative strain or
Optical cable and temperature optical cable, strain optical fiber when being laid with demonstration optical fiber tension stretching strain in lower optical fiber laying groove and generating normal strain
Or optical cable and temperature optical cable, strain optical cable can answer darkening for single mode optical fiber tight sleeve optic cable, single mode optical fiber naked fibre or other types
Cable, representative temperature optical cable can be single mode optical fiber loosely shielded optical cable or other type temperature sensing optical cables.
The apparatus for demonstrating enables optical-fiber deformation pipe generate deformation by hanging weight on optical-fiber deformation pipe, to enable optical fiber
The optical fiber or optical cable pasted in optical fiber laying groove on deformation tube generate negative strain, in optical fiber laying groove under season optical-fiber deformation pipe
The optical fiber or optical cable of stickup generate normal strain.
The apparatus for demonstrating is heated by the resistive heater that optical-fiber deformation inside pipe wall is laid with, and enables whole optical-fiber deformation
Pipe generates temperature change, and is controlled by demonstration temperature controller, and temperature is kept to stablize.
The apparatus for demonstrating fixing end includes into cylindrical fixation end housing 2a, one end of fixed end housing and optical fiber shape
Become pipe to connect by fixing threaded hole 2h, the other end is connected and fixed end protection cap 2b.
As shown in Fig. 3 (a)-Fig. 3 (c), set on the fixing end protection cap 2b there are four ring flange, ring flange includes and light
The upper flange plate 2c of optical fiber laying groove is pasted on fine deformation tube strain optical fiber/optical cable, the connection of temperature optical cable, and and optical-fiber deformation
Manage lower flange 2d, the fixing end protection cap 2b that strain optical fiber/optical cable, the temperature optical cable that lower optical fiber laying groove is pasted connect
On be additionally provided with the electric interfaces 2f connecting with resistive heater and temperature sensor.
The threaded hole that the fixed end housing is equipped with the threaded hole 2e of fixed protection cap and connect with foldable tripod
2g。
The demenstration method of compound apparatus for demonstrating is strained using a kind of portable distributed fiber optic temperature, comprising:
Step 101: straining sensing optical cable/optical fiber that two length are L is got out, L should be greater than 3m, representative value 10m, and two
End optical interface should be FC interface, takes up stickup respectively and is fixed to optical fiber laying groove and lower optical fiber laying groove on optical-fiber deformation pipe
In；
Step 102: preparing the temperature sensing optic cable that two length are similarly L, both ends optical interface should be FC interface, respectively will
It is pasted fixed in optical fiber laying groove on vacant optical-fiber deformation pipe and lower optical fiber laying groove；
Step 103；By one of strain sensing optical fiber cable or optical fiber and temperature sensing optic cable in upper optical fiber laying groove
Optical interface is held to access the corresponding upper flange plate in the position 2c in corresponding apparatus for demonstrating fixing end；
Step 104；By one of strain sensing optical fiber cable or optical fiber and temperature sensing optic cable in lower optical fiber laying groove
Optical interface is held to access the corresponding lower flange in the position 2d in corresponding apparatus for demonstrating fixing end；
Step 105: the wire welding of resistive heater and temperature sensor in optical-fiber deformation pipe is fixed to apparatus for demonstrating
It holds on the corresponding electric interfaces in the position 2f；
Step 106: by the optical-fiber deformation pipe mounting hole 1c at optical-fiber deformation pipe both ends, optical-fiber deformation pipe being fixed on demonstration
In device fixing end 3；
Step 107: being protected fixing end by the threaded hole of the corresponding fixed protection cap in the position 2e in apparatus for demonstrating fixing end
Protecting cover, which is fixed in apparatus for demonstrating fixing end, demonstrate temperature-resistant, the variation characteristic of data when strain variation；Temperature change,
The variation characteristic of data when straining constant；The variation characteristic of data when temperature and strain change simultaneously.
The specific steps of step 107 include:
Step 701: opening two folding tripods, respectively drilling folding tripod and apparatus for demonstrating both ends
Showing device fixing end is fixed by screw hole, using two folding tripods by the apparatus for demonstrating fixing end and light at both ends
Fine deformation tube is supported, and keeps optical-fiber deformation pipe horizontal；
Step 702: by optical patchcord or switching optical fiber respectively by answering in upper optical fiber laying groove and lower optical fiber laying groove
In the photoswitch that darkening fibre/optical cable and the access of temperature optical cable are connect with BOTDR；
Step 703: by the electric interfaces of apparatus for demonstrating fixing end, temperature controller and resistive heater and temperature being passed
Sensor connection.
As shown in figure 4, demonstrating temperature-resistant, the variation characteristic of data when strain variation using BOTDR method particularly includes:
Step A201: by BOTDR to the strain optical fiber/optical cable and temperature in upper optical fiber laying groove and lower optical fiber laying groove
Degree optical cable is tested, and trip temperature compensation calculation of going forward side by side obtains strain optical fiber/optical cable and the temperature light in optical fiber laying groove
Strain data SUT0, temperature data TUT0 at a temperature of cable room temperature T0, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature
Strain data SDT0, temperature data TDT0 at a temperature of optical cable room temperature T0；
Step A202: increasing counterweight on counterweight hook load-bearing plate, and counterweight weight W0, W0 representative value can be 100g, passes through
BOTDR tests the strain optical fiber/optical cable and temperature optical cable of upper optical fiber laying groove and lower optical fiber laying groove, and carries out temperature
Compensation calculation is spent, strain data at a temperature of optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable room temperature T0 is obtained
It is answered at a temperature of SUW0T0, temperature data TUW0T0, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable room temperature T0
Parameter is according to SDW0T0, temperature data TDW0T0；
Step A203: comparing data SUT0, SUW0T0, TUT0, TUW0T0, SDT0, SDW0T0, TDT0, TDW0T0, can be with
Demonstrate temperature-resistant, the variation characteristic of data when strain variation.
Temperature change, the variation characteristic of data when straining constant are demonstrated using BOTDR method particularly includes:
Step A301: by BOTDR in upper optical fiber laying groove and lower optical fiber laying groove strain optical fiber or optical cable and
Temperature optical cable is tested, and trip temperature compensation calculation of going forward side by side obtains optical fiber laying groove internal strain optical fiber or optical cable and temperature
Strain data SUW0T0, temperature data TUW0T0 at a temperature of optical cable room temperature T0, lower optical fiber laying groove internal strain optical fiber or optical cable with
And strain data SDW0T0, temperature data TDW0T0 at a temperature of temperature optical cable room temperature T0；
Step A302；It is T1 using demonstration temperature controller setting apparatus for demonstrating temperature, T1 representative temperature can be Celsius for 60
Degree, after waiting temperature controller temperature indicator is stablized, by BOTDR to the strain in upper optical fiber laying groove and lower optical fiber laying groove
Optical fiber/optical cable and temperature optical cable are tested, trip temperature compensation calculation of going forward side by side, obtain optical fiber laying groove internal strain optical fiber or
Strain data SUW0T1, temperature data TUW0T1 at a temperature of optical cable and temperature optical cable T1, lower optical fiber laying groove internal strain optical fiber
Or strain data SDW0T1, temperature data TDW0T1 at a temperature of optical cable and temperature optical cable T1；
Step A303: comparing data SUW0T0, SUW0T1, TUW0T0, TUW0T1, SDW0T0, SDW0T1, TDW0T0,
TDW0T1 can demonstrate temperature change, the variation characteristic of data when straining constant；
The variation characteristic of data when being changed simultaneously using BOTDR demonstration temperature and strain method particularly includes:
Step A401: by BOTDR in upper optical fiber laying groove and lower optical fiber laying groove strain optical fiber or optical cable and
Temperature optical cable is tested, and trip temperature compensation calculation of going forward side by side obtains optical fiber laying groove internal strain optical fiber or optical cable and temperature
Strain data SUW0T0, temperature data TUW0T0 at a temperature of optical cable room temperature T0, lower optical fiber laying groove internal strain optical fiber or optical cable with
And strain data SDW0T0, temperature data TDW0T0 at a temperature of temperature optical cable room temperature T0；
Step A402: changing counterweight weight on counterweight hook load-bearing plate, and counterweight weight W1, W1 representative value can be 200g, benefit
It is that T1 passes through BOTDR pairs after waiting temperature controller temperature indicator is stablized with demonstration temperature controller setting apparatus for demonstrating temperature
Strain optical fiber/optical cable and temperature optical cable in upper optical fiber laying groove and lower optical fiber laying groove are tested, and trip temperature of going forward side by side is mended
Calculating is repaid, strain data SUW1T1, temperature at a temperature of optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable T1 are obtained
Degree according to TUW1T1, strain data SDW1T1 at a temperature of lower optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable T1,
Temperature data TDW1T1；
Step A403:
Compare data SUW0T0, SUW1T1, TUW0T0, TUW1T1, SDW0T0, SDW1T1, TDW0T0, TDW1T1, demonstration
The variation characteristic of data when temperature and strain change simultaneously；Temperature can be demonstrated and strain the variation spy of data when changing simultaneously
Sign.
The present invention had both facilitated application deformation, and the optical-fiber deformation pipe that can also be heated simultaneously realizes in distributing optical fiber sensing
The compound generation of strain and temperature, the defect of strain variation or temperature change can only individually be demonstrated by overcoming traditional apparatus for demonstrating,
BOTDR/ROTDR distributed sensor can intuitively be demonstrated to the Perception Features of strain, temperature.It is directed to apparatus for demonstrating simultaneously
Fixing end and optical-fiber deformation pipe have carried out modularized design, after first assembly, paste the behaviour such as fixed without carrying out optical fiber again
Make, demonstration is convenient and efficient, and installing and dismounting is simple, convenient for mailing and carries.
As shown in figure 5, demonstrating temperature change, the specific side of the variation characteristic of temperature measurement data when straining constant using ROTDR
Method are as follows:
Step B301: by ROTDR in upper optical fiber laying groove and lower optical fiber laying groove strain optical fiber or optical cable and
Temperature optical cable is tested, and trip temperature compensation calculation of going forward side by side obtains optical fiber laying groove internal strain optical fiber or optical cable and temperature
Temperature data SUW0T0, TUW0T0 at a temperature of optical cable room temperature T0, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature light
Temperature data SDW0T0, TDW0T0 at a temperature of cable room temperature T0；
Step B302；It is T1, waiting temperature controller prompt temperature using demonstration temperature controller setting apparatus for demonstrating temperature
After degree is stablized, by ROTDR to the strain optical fiber or optical cable and temperature optical cable in upper optical fiber laying groove and lower optical fiber laying groove
Tested, obtain temperature data TSUW0T1 at a temperature of optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable T1,
Temperature data TSDW0T1 at a temperature of TTUW0T1, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable T1,
TTDW0T1；
Step B303: comparing data TSUW0T0, TSUW0T1, TTUW0T0, TTUW0T1, TSDW0T0, TSDW0T1,
TTDW0T0, TTDW0T1 demonstrate temperature change, the variation characteristic of ROTDR temperature measurement data when straining constant；
The variation characteristic of data when being changed simultaneously using ROTDR demonstration temperature and strain method particularly includes:
Step B401: by ROTDR in upper optical fiber laying groove and lower optical fiber laying groove strain optical fiber or optical cable and
Temperature optical cable is tested, and trip temperature compensation calculation of going forward side by side obtains optical fiber laying groove internal strain optical fiber or optical cable and temperature
Temperature data TSUW0T0, TTUW0T0 at a temperature of optical cable room temperature T0, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature
Temperature data TSDW0T0, TTDW0T0 at a temperature of optical cable room temperature T0；
Step B402: changing counterweight weight on counterweight hook load-bearing plate, and counterweight weight W1 is set using demonstration temperature controller
Setting apparatus for demonstrating temperature is T1, after waiting temperature controller temperature indicator is stablized, by ROTDR to upper optical fiber laying groove and lower light
Strain optical fiber or optical cable and temperature optical cable in fine laying groove are tested, and optical fiber laying groove internal strain optical fiber or light are obtained
Temperature data TSUW1T1, TTUW1T1 at a temperature of cable and temperature optical cable T1, lower optical fiber laying groove internal strain optical fiber or optical cable with
And temperature data TSDW1T1, TTDW1T1 at a temperature of temperature optical cable T1；
Step B403: comparing data TSUW0T0, TSUW1T1, TTUW0T0, TTUW1T1, TSDW0T0, TSDW1T1,
The variation characteristic of data when TTDW0T0, TTDW1T1, demonstration temperature and strain change simultaneously.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (9)
1. straining the demenstration method of compound apparatus for demonstrating using a kind of portable distributed fiber optic temperature, characterized in that Yi Zhongbian
It takes formula distributed fiber optic temperature and strains compound apparatus for demonstrating, including optical-fiber deformation pipe, the both ends of the optical-fiber deformation pipe are respectively with one
A apparatus for demonstrating fixing end connection, the apparatus for demonstrating fixing end is fixed on foldable tripod, on the optical-fiber deformation pipe
Equipped with counterweight hook load-bearing plate, counterweight hook load-bearing plate is connect with counterweight；The optical-fiber deformation inside pipe wall is coated with high-temperature insulation
Coating, and be equipped with resistive heater and temperature sensor, resistive heater and temperature sensor all with demonstration temperature controller
Connection, the outer surface of the optical-fiber deformation pipe is additionally provided with optical fiber laying groove and lower optical fiber laying groove；
Demenstration method includes:
Step 101: strain optical fiber or optical cable that two both ends optical interfaces are FC interface being tensed into stickup respectively and are fixed to upper optical fiber
In laying groove and lower optical fiber laying groove；
Step 102: by two, same, both ends optical interface is also FC with the length of straining sensing optical cable in step 101 or optical fiber
The temperature optical cable of interface is pasted respectively to be fixed in vacant upper optical fiber laying groove and lower optical fiber laying groove；
Step 103；One end optical interface of strain optical fiber or optical cable and temperature optical cable in upper optical fiber laying groove is accessed into demonstration
In device fixing end；
Step 104；One end optical interface of strain optical fiber or optical cable and temperature optical cable in lower optical fiber laying groove is also accessed and is drilled
In showing device fixing end；
Step 105: will be on the wire welding of resistive heater and temperature sensor in optical-fiber deformation pipe to apparatus for demonstrating fixing end；
Step 106: optical-fiber deformation pipe is fixed in apparatus for demonstrating fixing end；
Step 107: apparatus for demonstrating fixing end being fixed on foldable tripod and demonstrate temperature-resistant, number when strain variation
According to variation characteristic；Temperature change, the variation characteristic of data when straining constant；The variation of data when temperature and strain change simultaneously
Feature.
2. demenstration method as described in claim 1, characterized in that be laid in the upper optical fiber laying groove and paste demonstration optical fiber
Strain optical fiber or optical cable and temperature optical cable when being squeezed deformation and generating negative strain are laid in lower optical fiber laying groove and simultaneously paste
Demonstration optical fiber tension stretching strain and strain optical fiber or optical cable and temperature optical cable when generating normal strain.
3. demenstration method as described in claim 1, characterized in that the apparatus for demonstrating fixing end includes into cylindrical fixation
One end of end housing, fixed end housing is connect with optical-fiber deformation pipe by fixing threaded hole, and the other end is connected and fixed end protection cap.
4. demenstration method as claimed in claim 3, characterized in that set in the fixing end protection cap there are four ring flange, gone back
Equipped with the electric interfaces being connect with resistive heater and temperature sensor.
5. such as demenstration method as claimed in any one of claims 3 to 4, characterized in that the fixed end housing is equipped with fixed protect
The threaded hole of protecting cover and the threaded hole being connect with foldable tripod.
6. demenstration method as described in claim 1, characterized in that the optical-fiber deformation pipe is metal hollow pipe, optical-fiber deformation
Length of tube should be between 1m~1.6m, and diameter is greater than 2cm.
7. demenstration method as described in claim 1, characterized in that further include following before being demonstrated in the step 107
Step:
Step 701, two foldable tripods are opened, using two foldable tripods by the apparatus for demonstrating fixing end at both ends and
Optical-fiber deformation pipe is supported, and keeps optical-fiber deformation pipe horizontal；
Step 702: darkening will be answered in upper optical fiber laying groove and lower optical fiber laying groove respectively by optical patchcord or switching optical fiber
In the photoswitch that fine or optical cable and the access of temperature optical cable are connect with BOTDR；
Step 703: demonstration temperature controller is connect with resistive heater and temperature sensor.
8. demenstration method as claimed in claim 7, characterized in that demonstrate temperature-resistant, data when strain variation using BOTDR
The specific method of variation characteristic be,
Step A201: by BOTDR to the strain optical fiber or optical cable and temperature in upper optical fiber laying groove and lower optical fiber laying groove
Optical cable is tested, and trip temperature compensation calculation of going forward side by side obtains optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable
Strain data SUT0, temperature data TUT0 at a temperature of room temperature T0, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature light
Strain data SDT0, temperature data TDT0 at a temperature of cable room temperature T0；
Step A202: increasing counterweight on counterweight hook load-bearing plate, counterweight weight W0, by BOTDR to upper optical fiber laying groove and
The strain optical fiber or optical cable and temperature optical cable of lower optical fiber laying groove are tested, and trip temperature compensation calculation of going forward side by side obtains glazing
Strain data SUW0T0, temperature data at a temperature of fine laying groove internal strain optical fiber or optical cable and temperature optical cable room temperature T0
Strain data SDW0T0, temperature at a temperature of TUW0T0, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable room temperature T0
Degree is according to TDW0T0；
Step A203: compare data SUT0, SUW0T0, TUT0, TUW0T0, SDT0, SDW0T0, TDT0, TDW0T0 demonstrate temperature
It is constant, the variation characteristic of data when strain variation.
9. demenstration method as claimed in claim 7, characterized in that demonstrate temperature change, data when straining constant using BOTDR
Variation characteristic method particularly includes:
Step A301: by BOTDR to the strain optical fiber or optical cable and temperature in upper optical fiber laying groove and lower optical fiber laying groove
Optical cable is tested, and trip temperature compensation calculation of going forward side by side obtains optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable
Strain data SUW0T0, temperature data TUW0T0 at a temperature of room temperature T0, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature
Strain data SDW0T0, temperature data TDW0T0 at a temperature of degree optical cable room temperature T0；
Step A302；It is T1 using demonstration temperature controller setting apparatus for demonstrating temperature, waits demonstration temperature controller prompt temperature
After degree is stablized, by BOTDR to the strain optical fiber or optical cable and temperature optical cable in upper optical fiber laying groove and lower optical fiber laying groove
It is tested, trip temperature compensation calculation of going forward side by side, obtains optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable T1 temperature
Lower strain data SUW0T1, temperature data TUW0T1, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable T1 temperature
Spend lower strain data SDW0T1, temperature data TDW0T1；
Step A303: comparing data SUW0T0, SUW0T1, TUW0T0, TUW0T1, SDW0T0, SDW0T1, TDW0T0, TDW0T1,
Demonstrate temperature change, the variation characteristic of data when straining constant；
The variation characteristic of data when being changed simultaneously using BOTDR demonstration temperature and strain method particularly includes:
Step A401: by BOTDR to the strain optical fiber or optical cable and temperature in upper optical fiber laying groove and lower optical fiber laying groove
Optical cable is tested, and trip temperature compensation calculation of going forward side by side obtains optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable
Strain data SUW0T0, temperature data TUW0T0 at a temperature of room temperature T0, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature
Strain data SDW0T0, temperature data TDW0T0 at a temperature of degree optical cable room temperature T0；
Step A402: changing counterweight weight on counterweight hook load-bearing plate, and counterweight weight W1 is drilled using demonstration temperature controller setting
Showing device temperature is T1, after waiting demonstration temperature controller temperature indicator to stablize, by BOTDR to upper optical fiber laying groove and lower light
Strain optical fiber or optical cable and temperature optical cable in fine laying groove are tested, and trip temperature compensation calculation of going forward side by side obtains optical fiber
Strain data SUW1T1, temperature data TUW1T1 at a temperature of laying groove internal strain optical fiber or optical cable and temperature optical cable T1, lower light
Strain data SDW1T1, temperature data TDW1T1 at a temperature of fine laying groove internal strain optical fiber or optical cable and temperature optical cable T1；
Step A403: comparing data SUW0T0, SUW1T1, TUW0T0, TUW1T1, SDW0T0, SDW1T1, TDW0T0, TDW1T1,
The variation characteristic of data when demonstration temperature and strain change simultaneously；
Temperature change, the variation characteristic of temperature measurement data when straining constant are demonstrated using ROTDR method particularly includes:
Step B301: by ROTDR to the strain optical fiber or optical cable and temperature in upper optical fiber laying groove and lower optical fiber laying groove
Optical cable is tested, and trip temperature compensation calculation of going forward side by side obtains optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable
Temperature data SUW0T0, TUW0T0 at a temperature of room temperature T0, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable are normal
Temperature data SDW0T0, TDW0T0 at a temperature of warm T0；
Step B302；It is T1 using demonstration temperature controller setting apparatus for demonstrating temperature, waits demonstration temperature controller prompt temperature
After degree is stablized, by ROTDR to the strain optical fiber or optical cable and temperature optical cable in upper optical fiber laying groove and lower optical fiber laying groove
Tested, obtain temperature data TSUW0T1 at a temperature of optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable T1,
Temperature data TSDW0T1 at a temperature of TTUW0T1, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable T1,
TTDW0T1；
Step B303: comparing data TSUW0T0, TSUW0T1, TTUW0T0, TTUW0T1, TSDW0T0, TSDW0T1, TTDW0T0,
TTDW0T1 demonstrates temperature change, the variation characteristic of ROTDR temperature measurement data when straining constant；
The variation characteristic of data when being changed simultaneously using ROTDR demonstration temperature and strain method particularly includes:
Step B401: by ROTDR to the strain optical fiber or optical cable and temperature in upper optical fiber laying groove and lower optical fiber laying groove
Optical cable is tested, and trip temperature compensation calculation of going forward side by side obtains optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable
Temperature data TSUW0T0, TTUW0T0 at a temperature of room temperature T0, lower optical fiber laying groove internal strain optical fiber or optical cable and temperature optical cable
Temperature data TSDW0T0, TTDW0T0 at a temperature of room temperature T0；
Step B402: changing counterweight weight on counterweight hook load-bearing plate, and counterweight weight W1 is drilled using demonstration temperature controller setting
Showing device temperature is T1, after waiting demonstration temperature controller temperature indicator to stablize, by ROTDR to upper optical fiber laying groove and lower light
Strain optical fiber or optical cable and temperature optical cable in fine laying groove are tested, and optical fiber laying groove internal strain optical fiber or light are obtained
Temperature data TSUW1T1, TTUW1T1 at a temperature of cable and temperature optical cable T1, lower optical fiber laying groove internal strain optical fiber or optical cable with
And temperature data TSDW1T1, TTDW1T1 at a temperature of temperature optical cable T1；
Step B403: comparing data TSUW0T0, TSUW1T1, TTUW0T0, TTUW1T1, TSDW0T0, TSDW1T1, TTDW0T0,
The variation characteristic of data when TTDW1T1, demonstration temperature and strain change simultaneously.
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| CN101900616B (en) * | 2010-07-05 | 2012-06-06 | 宁波杉工结构监测与控制工程中心有限公司 | Optical fiber Bragg grating pressure sensor and corresponding measurement method thereof |
| CN102235921B (en) * | 2011-03-29 | 2013-12-04 | 徐峻锋 | Optical fiber sensor for detecting strain and temperature change simultaneously |
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