CN209247206U - A kind of caliberating device of linear temperature sensor array - Google Patents
A kind of caliberating device of linear temperature sensor array Download PDFInfo
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- CN209247206U CN209247206U CN201821652337.0U CN201821652337U CN209247206U CN 209247206 U CN209247206 U CN 209247206U CN 201821652337 U CN201821652337 U CN 201821652337U CN 209247206 U CN209247206 U CN 209247206U
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- temperature sensor
- linear temperature
- stereoplasm tube
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Abstract
A kind of caliberating device of linear temperature sensor array, 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, and the other end of linear temperature sensor array accesses (FBG) demodulator；The thermometer is in parallel with the sensing point on linear temperature sensor array to be fixed.A kind of caliberating device of linear temperature sensor array of the utility model, 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 utility model relates to optical fiber sensing fields, and in particular to a kind of calibration dress of linear temperature sensor array
It sets.
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 utility model is to overcome existing linear temperature sensor scaling method precision low, and consistency is poor, answers vulnerable to bending
The problems such as power influences, provides the caliberating device and method of a kind of linear temperature sensor array.
The technical solution that the utility model is taken are as follows:
A kind of caliberating device of linear temperature sensor array, including stereoplasm tube, linear temperature sensor array, temperature
Meter, (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, and linear temperature passes
The other end of sensor 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 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 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, note
Enter liquid heat-conducting medium, clump weight on one end bolt of traction rope fixes linear sensor array to be calibrated with traction rope；
S2: several high-precision thermometers are connect with computer, and setting temperature sampling time and interval after setting completed will
Thermometer is fixed on traction rope, and the probe for ensuring thermometer and the stop position phase on linear sensor array to be calibrated
Together；
S3: traction rope is put into stereoplasm tube together together with linear transducer and thermometer to be calibrated, until traction rope
On clump weight close to hard bottom of the tube, just traction rope is fixed at the top of stereoplasm tube；
S4: the other end of linear temperature sensor array is connected into fiber Bragg grating (FBG) demodulator, when the sampling of (FBG) demodulator is set
Between and interval it is consistent with thermometer, and data are automatically credited in database；
S5: after continuous measurement a period of time, traction rope, linear temperature sensor array and temperature are taken out from stereoplasm tube
Meter exports temperature data and corresponding wavelength data from the database of thermometer and (FBG) demodulator respectively；
S6: being fitted temperature-wavelength data using Origin software, obtains each light of linear temperature sensor array
The corresponding temperature characteristics of grid.
The utility model a kind of caliberating device and method of linear temperature sensor array, have the advantages that
1), linear calibration, precision are high:
The present apparatus is at straight configuration and not by stress shadow by the fixed fiber grating linear transducer of traction rope
It rings.Multiple high-precision platinum thermometers are matched into fixation with the independent grating of fiber grating linear transducer simultaneously, for measuring
Water environment temperature at grating to be calibrated, calibration environment is similar to practical linear applications occasion height, and stated accuracy is high.
2), batch is demarcated, unattended:
Using multiple high-precision platinum thermometers set temperature sample frequency and the sampling time and fiber grating it is linear
The independent grating of sensor, which matches, to be fixed, and the water environment temperature at corresponding grating is obtained.It is set using fiber Bragg grating (FBG) demodulator
The wavelength sample frequency of fiber grating and sampling time are identical as thermometer.Number can be automatically recorded simultaneously in calibration
According to only need to exporting data after calibration and handled, multiple light on fiber grating linear transducer may be implemented
The batch of grid is demarcated, and is 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 in plastic tube by external environment such as sunlight irradiation
Environment 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 utility model.
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 array, 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
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 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 the one of traction rope
Clump weight on bolt is held, linear sensor array to be calibrated is fixed with traction rope；
S2: when by connecting setting temperature sampling after several high-precision integral type platinum thermometers opening waterproof cover with computer
Between with interval.Thermometer is fixed on traction rope to after setting completed and is ensured the probe and linear sensing to be calibrated of thermometer
Stop position on device array is identical；
S3: traction rope is put into plastic tube together with linear transducer and thermometer to be calibrated until on traction rope together
Weight close to plastics bottom of the tube, just traction rope is fixed at the top of plastic 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 utility model proposes a kind of temperature of linear temperature sensor
Scaling method makes sensor be not affected by force by fixing fiber grating linear transducer with traction rope.It will be multiple high-precision
Degree platinum thermometer, which is fixed on traction rope, keeps it identical with the position of fiber grating linear transducer to be calibrated, guarantees sensing
Device measured temperature is consistent with environment temperature locating for thermometer.Plastic tube is fixed on fixed frame vertically, from nozzle plastic tube
Water is filled, the thermometric environment in practical hydrostatic is simulated.Change the temperature in plastic tube by the temperature of external environment.It will consolidate
The fiber grating linear transducer and thermometer set are put into plastic tube together together with traction rope, ensure that fiber grating is linear
Sensor is in during calibration and stretches not by stress state.Batch of grating on fiber grating linear transducer may be implemented
Amount calibration.The caliberating device and method of linear temperature sensor array disclosed by the utility model, overcome existing scaling method
Precision it is low, consistency 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,
There is important application value in the calibration of linear temperature sensor array.
In conclusion a kind of caliberating device of linear temperature sensor array disclosed by the utility model, overcomes existing
The precision of scaling method is low, consistency is poor, vulnerable to bending stress influence the problems such as, in high-precision fiber grating temperature sensor mark
There is important application value in fixed.
Claims (8)
1. a kind of caliberating device of linear temperature sensor array, including stereoplasm tube (4), linear temperature sensor array (2), temperature
Degree meter (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 array according to claim 1, it is characterised in that: the liquid is led
Thermal medium (8) is water or oil.
3. a kind of caliberating device of linear temperature sensor array according to claim 1, it is characterised in that: the Linear Temperature
Spending sensor array (2) is optical fiber optical grating array.
4. a kind of caliberating device of linear temperature sensor array according to claim 1, it is characterised in that: the device also wraps
It includes traction rope (3), is fixed between traction rope (3) and the linear temperature sensor array (2), the freedom of traction rope (3)
End also hangs with clump weight (10), for keeping the plummet state of traction rope (3).
5. a kind of caliberating device of linear temperature sensor array according to claim 4, 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), it is to be calibrated for guiding
Linear temperature sensor array vertical be placed in stereoplasm tube (4).
6. a kind of caliberating device of linear temperature sensor array according to claim 1, it is characterised in that: the thermometer
It (7) is 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 array according to claim 1, it is characterised in that: the (FBG) demodulator
It (1) is fiber Bragg grating (FBG) demodulator.
8. a kind of caliberating device of linear temperature sensor array according to claim 1, it is characterised in that: the stereoplasm tube
(4) plastic tube is used.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821652337.0U CN209247206U (en) | 2018-10-11 | 2018-10-11 | A kind of caliberating device of linear temperature sensor array |
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| CN201821652337.0U CN209247206U (en) | 2018-10-11 | 2018-10-11 | A kind of caliberating device of linear temperature sensor array |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141683A (en) * | 2018-10-11 | 2019-01-04 | 三峡大学 | A kind of caliberating device and method of linear temperature sensor array |
| CN111811808A (en) * | 2020-07-14 | 2020-10-23 | 浙江大学 | Industrial valve body stress measuring device and method |
| CN111811694A (en) * | 2020-07-13 | 2020-10-23 | 广东博智林机器人有限公司 | Temperature calibration method, device, equipment and storage medium |
-
2018
- 2018-10-11 CN CN201821652337.0U patent/CN209247206U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141683A (en) * | 2018-10-11 | 2019-01-04 | 三峡大学 | A kind of caliberating device and method of linear temperature sensor array |
| CN109141683B (en) * | 2018-10-11 | 2024-03-12 | 三峡大学 | Calibration device and method for linear temperature sensor array |
| CN111811694A (en) * | 2020-07-13 | 2020-10-23 | 广东博智林机器人有限公司 | Temperature calibration method, device, equipment and storage medium |
| CN111811694B (en) * | 2020-07-13 | 2021-11-30 | 广东博智林机器人有限公司 | Temperature calibration method, device, equipment and storage medium |
| CN111811808A (en) * | 2020-07-14 | 2020-10-23 | 浙江大学 | Industrial valve body stress measuring device and method |
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