CN109141683A - A kind of caliberating device and method of linear temperature sensor array - Google Patents
A kind of caliberating device and method of linear temperature sensor array Download PDFInfo
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- CN109141683A CN109141683A CN201811184877.5A CN201811184877A CN109141683A CN 109141683 A CN109141683 A CN 109141683A CN 201811184877 A CN201811184877 A CN 201811184877A CN 109141683 A CN109141683 A CN 109141683A
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- temperature sensor
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- linear temperature
- traction rope
- thermometer
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000835 fiber Substances 0.000 claims abstract description 31
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000004033 plastic Substances 0.000 claims abstract description 17
- 229920003023 plastic Polymers 0.000 claims abstract description 17
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 17
- 238000005070 sampling Methods 0.000 claims description 12
- 239000013307 optical fiber Substances 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 6
- 239000000523 sample Substances 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 4
- 230000002706 hydrostatic effect Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 2
- 239000006244 Medium Thermal Substances 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/007—Testing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
A kind of caliberating device and method of linear temperature sensor array, including stereoplasm tube, fixed frame, linear sensor array, high-precision platinum thermometer, (FBG) demodulator.Linear transducer and traction rope are fixed, sensor is made to be not affected by force；Multiple high-precision platinum thermometers, which are fixed on traction rope, keeps it identical with the position of sensor to be calibrated；Fixed frame fixes plastic tube vertically, and bottom closing fills water from nozzle, simulates the thermometric environment in practical hydrostatic；The linear transducer fixed and thermometer are put into plastic tube together together with traction rope, guarantees that sensor is in during calibration and stretches not by stress state.Change the temperature in plastic tube by the temperature of external environment.Compare the time of measuring and temperature value of linear transducer and high-precision platinum thermometer, the temperature curve of calibration sensor.The caliberating device and method of linear temperature sensor disclosed by the invention, the precision for overcoming existing scaling method is low, consistency is poor, the problems such as influencing vulnerable to bending stress, has important application value in high-precision fiber grating temperature sensor calibration.
Description
Technical field
The present invention relates to optical fiber sensing fields, and in particular to a kind of caliberating device of linear temperature sensor array and
Method.
Background technique
Fiber Bragg Grating Sensor Array due to its have high sensitivity, electromagnetism interference, large space distributed measurement and
It is huge in high-precision temperature sensory field application potential convenient for remarkable advantages such as networkings.But since fiber-optic grating sensor is direct
What is measured is the variation of wavelength, can not directly be reflected to temperature.The variation of fiber grating bragg wavelength and temperature
Variation is in a linear relationship under certain condition, by carrying out temperature calibration to linear fiber-optic grating sensor, determines optical fiber light
The relationship of grid wavelength variable quantity and variation of ambient temperature amount can accurately calculate temperature value by wavelength, realize fiber grating
Temperature is measured.
The scaling method of conventional fiber grating temperature sensor be directly by sensor itself be placed in constant temperature gas cabinet or
In isothermal liquid bath, environment temperature is changed by the included heating source of constant temperature gas cabinet or isothermal liquid bath.It is sent out in practice
It is existing, change the temperature of gas or liquid using mode is directly heated, is influenced by heat source working method and installation site, and
The limitation of medium thermal conduction characteristic itself, constant temperature gas cabinet or Temperature Distribution in isothermal liquid bath are simultaneously uneven, although all
More thermostats assist thermal diffusion using fan or blender, but in device different location temperature difference it is still very big, such as certain
Show 0.1 DEG C of temperature accuracy of brand constant temperature gas cabinet, but the lack of uniformity of actual the temperature inside the box is greater than 0.5 DEG C, thermostatical oil
Bath heating source is nearby and the temperature difference far from region is greater than 0.5 DEG C.And general constant temperature gas cabinet or isothermal liquid bath volume
Smaller, fiber grating temperature sensor array mostly uses greatly the mode for being wound into disk to be placed in constant temperature gas cabinet or isothermal liquid bath
In demarcated.It is wrapped on the disk that diameter is 25cm after finding fiber grating temperature sensor stranding in experiment and stretches shape
Fiber bragg grating center wavelength under state differs about 10pm, illustrate fiber grating temperature sensor array in curved situation by
Stress.When the fiber grating of bending coiling, which is placed in, carries out temperature calibration in constant temperature gas cabinet or isothermal liquid bath,
Since fiber-optic grating sensor is by stress influence, therefore the central wavelength and temperature for calibrating the fiber grating come can be presented
Non-linear relation, therefore the accuracy that optical fiber grating temperature can be demarcated.It is limited by above-mentioned calibration condition, traditional optical fiber light
Gate sensor temperature accuracy is generally nominally 0.5 DEG C.This precision has been able to satisfy the demand of the general temperature monitoring such as fire, but
In the high-precision temperature field monitoring such as dam temperature field, water environment, soil moisture content monitoring, it has been difficult to meet scene
The requirement of temperature monitoring, such as when being monitored to the temperature gradient of water environment, the temperature of fiber-optic grating sensor is needed to measure
Required precision is better than 0.1 DEG C, has been difficult to meet high precision optical fiber grating temperature sensing using traditional caliberating device and method
The calibration demand of device.
Summary of the invention
The present invention is to overcome existing linear temperature sensor scaling method precision low, and consistency is poor, vulnerable to bending stress shadow
The problems such as ringing, provides the caliberating device and method of a kind of linear temperature sensor.
The technical scheme adopted by the invention is as follows:
A kind of caliberating device of linear temperature sensor, including stereoplasm tube, linear temperature sensor array, thermometer, (FBG) demodulator,
Fixed frame.
The stereoplasm tube bottom end is sealed and there are valve, top end openings；Fixed frame vertically fixes stereoplasm tube；
Liquid heat-conducting medium is full of in the stereoplasm tube；
One end of the linear temperature sensor array is freely placed along Open Side Down on stereoplasm tube top, linear temperature sensor
The other end of array accesses (FBG) demodulator；
The thermometer is in parallel with the sensing point on linear temperature sensor array to be fixed.
The liquid heat-conducting medium is water or oil.
The linear temperature sensor array is optical fiber optical grating array.
The device further includes traction rope, is fixed between traction rope and the linear temperature sensor array, traction rope
Free end also hang with clump weight, for keeping the plummet state of traction rope.
Segmentation fixation is carried out with fixed cable tie between the traction rope and the linear temperature sensor array, for drawing
Lead that linear temperature sensor array to be calibrated is vertical to be placed in stereoplasm tube
The temperature is calculated as platinum electronic thermometer, using integral type enclosed package, for sampling time interval, absolute measuring to be arranged
Accuracy of measurement is 0.01 DEG C, and the reaction time is better than 0.1 second.
The (FBG) demodulator is fiber Bragg grating (FBG) demodulator, and scanning wavelength step pitch is better than 0.1 pm less than 4 pm, wavelength stability,
The demodulation time of grating array was less than 0.1 second.
The stereoplasm tube uses plastic tube.
A kind of temperature calibration method of linear temperature sensor, comprising the following steps:
S1: stereoplasm tube is fixed on fixed frame, so that stereoplasm tube and ground is kept thousand directly filling, is closed bottom end valve, inject liquid
Linear sensor array to be calibrated is fixed clump weight on one end bolt of traction rope by state heat-conducting medium with traction rope；
S2: several high-precision thermometers are connect with computer, setting temperature sampling time and interval, after setting completed by temperature
Meter is fixed on traction rope, and ensures that the probe of thermometer is identical as the stop position on linear sensor array to be calibrated；
S3: traction rope is put into stereoplasm tube together together with linear transducer and thermometer to be calibrated, until on traction rope
Traction rope is just fixed at the top of stereoplasm tube by clump weight close to hard bottom of the tube；
S4: connecting fiber Bragg grating (FBG) demodulator for the other end of linear temperature sensor array, be arranged (FBG) demodulator sampling time and
Interval is consistent with thermometer, and data are automatically credited in database；
S5: after continuous measurement a period of time, taking out traction rope, linear temperature sensor array and thermometer from stereoplasm tube,
Temperature data and corresponding wavelength data are exported from the database of thermometer and (FBG) demodulator respectively；
S6: being fitted temperature-wavelength data using Origin software, obtains each grating pair of linear temperature sensor array
The temperature characteristics answered.
The present invention a kind of caliberating device and method of linear temperature sensor, have the advantages that
1), linear calibration, precision are high:
The present apparatus is at straight configuration and is not affected by force by the fixed fiber grating linear transducer of traction rope.Together
When multiple high-precision platinum thermometers are matched into fixation with the independent grating of fiber grating linear transducer, it is to be calibrated for measuring
Water environment temperature at grating, calibration environment is similar to practical linear applications occasion height, and stated accuracy is high.
2), batch is demarcated, unattended:
The sample frequency and sampling time and fiber grating linear sensing of temperature are set using multiple high-precision platinum thermometers
The independent grating of device, which matches, to be fixed, and the water environment temperature at corresponding grating is obtained.Optical fiber is set using fiber Bragg grating (FBG) demodulator
The wavelength sample frequency of grating and sampling time are identical as thermometer.Data can be automatically recorded simultaneously in calibration, only
Data need to be exported after calibration to be handled, batch of multiple gratings on fiber grating linear transducer may be implemented
Amount calibration, and guarded without people.
3), device is simple, is not necessarily to heating device:
Calibration environment is provided using plastic tube water storage, changes the water environment in plastic tube by external environment such as sunlight irradiation
Temperature changes water temperature without additional heating device, so that entire caliberating device is simpler.
Detailed description of the invention
Fig. 1 is a kind of caliberating device of linear temperature sensor array of the invention.
In Fig. 1: 1 is (FBG) demodulator；2 be linear temperature sensor array；3 be traction rope；4 be stereoplasm tube；5 prick to be fixed
Band；6 be sensor；7 be thermometer；8 be liquid heat-conducting medium；9 be fixed frame；10 be clump weight.
Specific embodiment
As shown in Figure 1, a kind of caliberating device of linear temperature sensor, including stereoplasm tube 4, linear temperature sensor array
2, thermometer 7, (FBG) demodulator 1, fixed frame 9.
4 bottom end of stereoplasm tube is sealed and there are valve, top end openings；Fixed frame 9 is vertically fixed by stereoplasm tube 4；
Liquid heat-conducting medium 8 is full of in the stereoplasm tube 4；
One end of the linear temperature sensor array 2 is freely placed along Open Side Down on stereoplasm tube 4 top, linear temperature sensing
The other end of device array 2 accesses (FBG) demodulator 1；
The thermometer 7 is in parallel with the sensing point on linear temperature sensor array 2 to be fixed.
The liquid heat-conducting medium 8 is water or oil, and temperature is changed by the environment temperature outside stereoplasm tube 4.
The linear temperature sensor array 2 is optical fiber optical grating array.
The device further includes traction rope 3, is fixed between traction rope 3 and the linear temperature sensor array 2, traction
The free end of rope 3 also hangs with clump weight 10, for keeping the plummet state of traction rope 3.
Segmentation fixation can be carried out between traction rope 3 and the linear temperature sensor array 2 with fixed cable tie 5, is used
In guidance linear temperature sensor array to be calibrated being placed in stereoplasm tube 4 vertically, guarantee linear temperature sensor array 2 not
Affected by force.
The 7 platinum electronic thermometer of thermometer, using integral type enclosed package, for sampling time interval to be arranged, absolutely
It is 0.01 DEG C to measurement accuracy, the reaction time is better than 0.1 second.
The (FBG) demodulator 1 is fiber Bragg grating (FBG) demodulator, and scanning wavelength step pitch is better than 0.1 less than 4 pm, wavelength stability
Pm, the demodulation time of grating array was less than 0.1 second.Can be by automatic data collection after the setting sampling interval, and data are deposited
It is stored in database.
The stereoplasm tube 4 uses plastic tube.
A kind of temperature calibration method of linear temperature sensor, comprising the following steps:
S1: plastic tube is fixed on fixed frame, closes bottom end valve, injects liquid heat-conducting medium.By one end bolt of traction rope
Upper clump weight fixes linear sensor array to be calibrated with traction rope；
S2: several high-precision integral type platinum thermometers are opened connect with computer after waterproof cover the setting temperature sampling time and
Interval.Thermometer is fixed on traction rope after setting completed and ensures popping one's head in and linear transducer battle array to be calibrated for thermometer
Stop position on column is identical；
S3: traction rope is put into plastic tube the weight until on traction rope together with linear transducer and thermometer to be calibrated together
Traction rope is just fixed at the top of plastic tube by object close to plastics bottom of the tube.
S4: the other end of fiber grating linear transducer is connected into fiber Bragg grating (FBG) demodulator, fiber Bragg grating (FBG) demodulator is set
Sampling time and interval it is consistent with platinum thermometer, and data are automatically credited in database.
S5: after continuous measurement a period of time, traction rope, Fiberoptic Array Sensing device and platinum temperature are taken out from plastic tube
Meter.Temperature data and corresponding wavelength data are exported from the database of platinum thermometer and fiber Bragg grating (FBG) demodulator respectively.
S6: being fitted temperature-wavelength data using Origin software, obtains each light of fiber grating linear transducer
The corresponding temperature characteristics of grid.
Aiming at the problem that existing sensor array calibrating, the invention proposes a kind of temperature calibrations of linear temperature sensor
Method makes sensor be not affected by force by fixing fiber grating linear transducer with traction rope.By multiple high-precision platinum
Golden thermometer, which is fixed on traction rope, keeps it identical with the position of fiber grating linear transducer to be calibrated, guarantees sensor institute
Testing temperature is consistent with environment temperature locating for thermometer.Plastic tube is fixed on fixed frame vertically, is filled from nozzle plastic tube
Water simulates the thermometric environment in practical hydrostatic.Change the temperature in plastic tube by the temperature of external environment.It will fix
Fiber grating linear transducer and thermometer be put into plastic tube together together with traction rope, ensure that fiber grating linear sensing
Device is in during calibration and stretches not by stress state.The batch mark of grating on fiber grating linear transducer may be implemented
It is fixed.The caliberating device and method of linear temperature sensor disclosed by the invention, the precision for overcoming existing scaling method is low, unanimously
Property it is poor, the problems such as vulnerable to stress influence, have many advantages, such as that stated accuracy is high, exempt from stress calibration, is high-efficient, sensed in linear temperature
There is important application value in the calibration of device array.
In conclusion the caliberating device and method of a kind of linear temperature sensor array disclosed by the invention, overcome existing
There is the problems such as precision of scaling method is low, consistency is poor, influences vulnerable to bending stress, in high-precision fiber grating temperature sensor
There is important application value in calibration.
Claims (9)
1. a kind of caliberating device of linear temperature sensor, including stereoplasm tube (4), linear temperature sensor array (2), thermometer
(7), (FBG) demodulator (1), fixed frame (9)；It is characterized by:
Stereoplasm tube (4) bottom end is sealed and there are valve, top end openings；Fixed frame (9) is vertically fixed by stereoplasm tube (4)；
Liquid heat-conducting medium (8) are full of in the stereoplasm tube (4)；
One end of the linear temperature sensor array (2) is freely placed along Open Side Down on stereoplasm tube (4) top, linear temperature
The other end of sensor array (2) accesses (FBG) demodulator (1)；
The thermometer (7) is in parallel with the sensing point on linear temperature sensor array (2) to fix.
2. a kind of caliberating device of linear temperature sensor according to claim 1, it is characterised in that: the liquid heat conductive is situated between
Matter (8) is water or oil.
3. a kind of caliberating device of linear temperature sensor according to claim 1, it is characterised in that: the linear temperature passes
Sensor array (2) is optical fiber optical grating array.
4. a kind of caliberating device of linear temperature sensor according to claim 1, it is characterised in that: the device further includes leading
Messenger (3) is fixed between traction rope (3) and the linear temperature sensor array (2), and the free end of traction rope (3) is also
Clump weight (10) are hung with, for keeping the plummet state of traction rope (3).
5. a kind of caliberating device of linear temperature sensor according to claim 1, it is characterised in that: the traction rope (3)
Segmentation fixation is carried out with fixed cable tie (6) between the linear temperature sensor array (2), for guiding line to be calibrated
Property array of temperature sensor is vertical is placed in stereoplasm tube (4).
6. a kind of caliberating device of linear temperature sensor according to claim 1, it is characterised in that: the thermometer (7)
For platinum electronic thermometer, using integral type enclosed package, for sampling time interval to be arranged.
7. a kind of caliberating device of linear temperature sensor according to claim 1, it is characterised in that: the (FBG) demodulator (1)
For fiber Bragg grating (FBG) demodulator.
8. a kind of caliberating device of linear temperature sensor according to claim 1, it is characterised in that: the stereoplasm tube (4)
Using plastic tube.
9. a kind of temperature calibration method of linear temperature sensor, it is characterised in that the following steps are included:
S1: stereoplasm tube (4) is fixed on fixed frame (9), so that stereoplasm tube (4) and ground is kept thousand directly filling, is closed bottom end valve
Door injects liquid heat-conducting medium (8), by clump weight (10) on one end bolt of traction rope (3), by linear transducer battle array to be calibrated
Column are fixed with traction rope (3)；
S2: several high-precision thermometers (7) are connect with computer, and setting temperature sampling time and interval after setting completed will
Thermometer (7) is fixed on traction rope (3), and the probe for ensuring thermometer and the grating on linear sensor array to be calibrated
Position is identical；
S3: traction rope (3) is put into stereoplasm tube (4) together together with linear transducer and thermometer (7) to be calibrated, until leading
Traction rope (3) is just fixed at the top of stereoplasm tube (4) by the clump weight (10) on messenger (3) close to stereoplasm tube (4) bottom；
S4: the other end of linear temperature sensor array (2) is connected into fiber Bragg grating (FBG) demodulator, the sampling of (FBG) demodulator (1) is set
Time and interval are consistent with thermometer (7), and data are automatically credited in database；
S5: after continuous measurement a period of time, from taken out in stereoplasm tube (4) traction rope (3), linear temperature sensor array (2) with
And thermometer (7), temperature data and corresponding wavelength data are exported from the database of thermometer (7) and (FBG) demodulator (1) respectively；
S6: being fitted temperature-wavelength data, and it is special to obtain the corresponding temperature of linear temperature sensor array (2) each grating
Linearity curve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811184877.5A CN109141683B (en) | 2018-10-11 | 2018-10-11 | Calibration device and method for linear temperature sensor array |
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| CN201811184877.5A CN109141683B (en) | 2018-10-11 | 2018-10-11 | Calibration device and method for linear temperature sensor array |
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| CN109141683B CN109141683B (en) | 2024-03-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110319951A (en) * | 2019-07-18 | 2019-10-11 | 华北电力科学研究院有限责任公司 | The temperature monitoring system and method for enclosed busbar |
| CN110411609A (en) * | 2019-02-14 | 2019-11-05 | 辽宁达能电气股份有限公司 | A kind of distributed optical fiber temperature measurement on-line calibration device and calibration method |
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| CN109141683B (en) | 2024-03-12 |
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