CN208818367U - A kind of fiber grating temperature sensor - Google Patents
A kind of fiber grating temperature sensor Download PDFInfo
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- CN208818367U CN208818367U CN201821693125.7U CN201821693125U CN208818367U CN 208818367 U CN208818367 U CN 208818367U CN 201821693125 U CN201821693125 U CN 201821693125U CN 208818367 U CN208818367 U CN 208818367U
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Abstract
The utility model discloses a kind of fiber grating temperature sensors; including sensor protection shell, 2.0 protection pipes, PVC tail sleeve, 0.9 Loose tube and fiber grating; a groove is equipped among sensor protection shell; it is located at groove lower part at left and right sides of sensor protection shell and is provided with a through-hole, PVC tail sleeve is fixedly connected on the inner wall two sides of sensor protection shell by through-hole；The utility model, optical fiber is electrical isolation, corrosion resistant transmission medium, thus is not afraid of strong electromagnetic, nor affects on extraneous electromagnetic field, it is made to have very high reliability and stability；In addition the temperature sensor measurements have good repeatability, convenient for constituting various forms of optical fiber sensing networks, can be used for the absolute measurement of extraneous parameter, multiple gratings can also be written in an optical fiber, constitute sensor array, realize quasi-distributed measurement；Upper protective shell can be very good to perceive exterior temperature change using ceramic material.
Description
Technical field
The utility model relates to a kind of temperature sensor, in particular to a kind of fiber grating temperature sensor belongs to temperature
Sensor technical field.
Background technique
Fiber grating temperature sensor is by internal sensing element --- cardiac wave in the optical signal that fiber grating is reflected
Long amount of movement detects the sensor of temperature.Mounting structure with the different encapsulation such as surface-type, flush type, immersion.Due to
Fiber grating temperature sensor be using light wave transmissions information, and optical fiber be electrically insulated, corrosion resistant transmission medium, because without
Be afraid of strong electromagnetic, nor affect on extraneous electromagnetic field, this makes it in various large-scale electromechanics, petrochemical industry, metallurgical high pressure, forceful electric power
Monitoring can be conveniently and effectively realized in magnetic disturbance, inflammable, explosive, strong corrosive environment, and there are very high reliability and stability.
In addition fiber grating temperature sensor measurement result has good repeatability, convenient for constituting various forms of optical fiber sensor networks
Network can be used for the absolute measurement of extraneous parameter.Multiple gratings can also be written in an optical fiber, constitute sensor array, realize quasi-
Distributed measurement.
Temperature is also to directly affect the factor of optic fiber grating wavelength variation, and people are usually directly using bare optical fibers and bare optical gratings as temperature
Degree sensor is directly applied.Fiber grating temperature sensor is also required to be packaged, the main function of encapsulation technology be protection and
Enhanced sensitivity, it is intended that fiber grating can have stronger mechanical strength and longer service life, at the same time, it is also desirable to can be in light
The response sensitivity of fiber grating pair temperature is improved in fibre sensing by encapsulation technology appropriate.
Currently used packaged type, is all the encapsulating structure using round tube shape, or the double-deck round tube, or thick fistulae+have
Color tubule or multiple round tubes are nested, and the production of these structures is all to be packaged using pure craft to sensor, and production efficiency is low
Under, influence the high speed process that industrialization is carried out to fiber grating.
Utility model content
The technical problems to be solved in the utility model is the shortcomings that overcoming in the prior art, and proposing can be to the change of temperature
Change a kind of fiber grating temperature sensor for making that reaction rapidly, the response time is short, avoids response time delay.
In order to solve the above-mentioned technical problem, the utility model provides the following technical solution:
The utility model provides a kind of fiber grating temperature sensor, including sensor protection shell, 2.0 protection pipes, PVC
Tail sleeve, 0.9 Loose tube and fiber grating, the sensor protection shell centre are equipped with a groove, described sensor protection shell or so
Two sides are located at groove lower part and are provided with a through-hole, and the PVC tail sleeve is fixedly connected on sensor protection shell by the through-hole
Inner wall two sides；Fibre core is equipped with inside the fiber grating, the fiber grating is fixed on the groove in the sensor protection shell
Interior, 0.9 Loose tube is sheathed on the fiber grating, and the interior of 0.9 Loose tube is fixed in the fibre core left and right ends
Wall both ends, the PVC tail sleeve are fixed on the both ends of the fiber grating；The sensor protection shell includes upper protection cap and lower guarantor
Protective case.
As a kind of optimal technical scheme of the utility model, the sensor protection shell is rectangular shape.
As a kind of optimal technical scheme of the utility model, the upper protection cap uses ceramic material, and the upper guarantor
Protecting cover is fixed by glue and the lower protective shell.
As a kind of optimal technical scheme of the utility model, the both ends of the fiber grating are connected by dispensing hydropexis
In the bottom of the groove.
The utility model beneficial effect achieved is: the utility model, and optical fiber is electrical isolation, corrosion resistant transmission Jie
Matter, thus it is not afraid of strong electromagnetic, extraneous electromagnetic field is nor affected on, keeps it high in various large-scale electromechanics, petrochemical industry, metallurgy
Pressure, strong electromagnetic can conveniently and effectively realize monitoring in inflammable, explosive, strong corrosive environment, have very high reliability and
Stability；In addition the temperature sensor measurements have good repeatability, convenient for constituting various forms of optical fiber sensor networks
Network can be used for the absolute measurement of extraneous parameter, and multiple gratings can also be written in an optical fiber, constitute sensor array, realize quasi-
Distributed measurement；Upper protective shell can be very good to perceive exterior temperature change using ceramic material.
Detailed description of the invention
Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this
Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the main view of the utility model；
Fig. 3 is the structural schematic diagram of the utility model fiber grating and 0.9 Loose tube；
Fig. 4 is the structural schematic diagram of the utility model fiber grating and fibre core；
In figure: 1, sensor protection shell；2,2.0 protection pipe；3, PVC tail sleeve；4,0.9 Loose tube；5, fiber grating；6, recessed
Slot；7, fibre core；8, upper protection cap；9, lower protective shell.
Specific embodiment
It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
Embodiment 1
As shown in Figs 1-4, the utility model provides a kind of fiber grating temperature sensor, including sensor protection shell 1,
2.0 protection pipes 2, PVC tail sleeve 3,0.9 Loose tube 4 and fiber grating 5 are equipped with a groove 6, sensor among sensor protection shell 1
It is located at 6 lower part of groove at left and right sides of protective shell 1 and is provided with a through-hole, PVC tail sleeve 3 is fixedly connected on sensor protection by through-hole
The inner wall two sides of shell 1；Fibre core 7 is equipped with inside fiber grating 5, fiber grating 5 is fixed in the groove 6 in sensor protection shell 1,
0.9 Loose tube 4 is sheathed on fiber grating 5, and the inner wall both ends of 0.9 Loose tube 4, PVC tail sleeve 3 are fixed in 7 left and right ends of fibre core
It is fixed on the both ends of fiber grating 5；Sensor protection shell 1 includes upper protection cap 8 and lower protective shell 9.
Sensor protection shell 1 is rectangular shape；Upper protection cap 8 use ceramic material, and upper protection cap 8 by glue with
Lower protective shell 9 is fixed, and upper protective shell can be very good to perceive exterior temperature change using ceramic material；The two of fiber grating 5
End is connected to the bottom of groove 6 by dispensing hydropexis.
Concrete operating principle: the device in use, using fiber optic materials light sensitivity, will by the method for ultraviolet photoetching
Fibre core is written in the relevant field pattern of incident light, and the refractive index periodic generated in fibre core along fibre core axial direction changes, to be formed forever
The phase grating in long property space, effect are substantially (transmission or reflection) filter or anti-that a narrowband is formed in fibre core
Penetrate mirror；When a beam of broad spectrum light pass through fiber grating 5 when, meet fiber grating Bragg condition wavelength will generate reflection (λ=
2n Λ, n are the effective refractive index of fibre core, and Λ is the modulation period of fiber core refractive index), remaining wavelength through fiber grating 5 after
Resume defeated, when temperature change directly affects 5 wavelength change Δ λ of fiber grating, detects this wavelength change and converts into temperature value and just feels
Know change in temperature Δ T.
The utility model beneficial effect achieved is: the utility model, and optical fiber is electrical isolation, corrosion resistant transmission Jie
Matter, thus it is not afraid of strong electromagnetic, extraneous electromagnetic field is nor affected on, keeps it high in various large-scale electromechanics, petrochemical industry, metallurgy
Pressure, strong electromagnetic can conveniently and effectively realize monitoring in inflammable, explosive, strong corrosive environment, have very high reliability and
Stability；In addition the temperature sensor measurements have good repeatability, convenient for constituting various forms of optical fiber sensor networks
Network can be used for the absolute measurement of extraneous parameter, and multiple gratings can also be written in an optical fiber, constitute sensor array, realize quasi-
Distributed measurement；Upper protective shell can be very good to perceive exterior temperature change using ceramic material.
Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention, it is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of technical characteristic
It is equivalently replaced.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on,
It should be included within the scope of protection of this utility model.
Claims (4)
1. a kind of fiber grating temperature sensor, including sensor protection shell (1), 2.0 protection pipes (2), PVC tail sleeve (3), 0.9
Loose tube (4) and fiber grating (5), which is characterized in that be equipped with a groove (6) among the sensor protection shell (1), the biography
It is located at groove (6) lower part at left and right sides of sensor protective shell (1) and is provided with a through-hole, the PVC tail sleeve (3) is solid by the through-hole
Surely the inner wall two sides of sensor protection shell (1) are connected to；Fibre core (7) are equipped with inside the fiber grating (5), the fiber grating
(5) it is fixed on the groove (6) in the sensor protection shell (1) Nei, 0.9 Loose tube (4) is sheathed on the fiber grating
(5) on, the inner wall both ends of 0.9 Loose tube (4) are fixed in fibre core (7) left and right ends, and the PVC tail sleeve (3) is fixed
In the both ends of the fiber grating (5)；The sensor protection shell (1) includes upper protection cap (8) and lower protective shell (9).
2. a kind of fiber grating temperature sensor according to claim 1, which is characterized in that the sensor protection shell
It (1) is rectangular shape.
3. a kind of fiber grating temperature sensor according to claim 1, which is characterized in that the upper protection cap (8) is adopted
With ceramic material, and the upper protection cap (8) is fixed by glue and the lower protective shell (9).
4. a kind of fiber grating temperature sensor according to claim 1, which is characterized in that the fiber grating (5)
Both ends are connected to the bottom of the groove (6) by dispensing hydropexis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821693125.7U CN208818367U (en) | 2018-10-18 | 2018-10-18 | A kind of fiber grating temperature sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821693125.7U CN208818367U (en) | 2018-10-18 | 2018-10-18 | A kind of fiber grating temperature sensor |
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| Publication Number | Publication Date |
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| CN208818367U true CN208818367U (en) | 2019-05-03 |
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| CN201821693125.7U Active CN208818367U (en) | 2018-10-18 | 2018-10-18 | A kind of fiber grating temperature sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542492A (en) * | 2019-10-10 | 2019-12-06 | 深圳市基础工程有限公司 | Fiber grating temperature sensor with built-in heat-conducting liquid |
| CN113588119A (en) * | 2021-06-29 | 2021-11-02 | 中国船舶重工集团公司第七一五研究所 | Method for measuring wall temperature of high-temperature part of aircraft engine based on femtosecond fiber bragg grating sensing |
| CN114152364A (en) * | 2021-11-05 | 2022-03-08 | 南京南瑞水利水电科技有限公司 | Temperature monitoring optical fiber sensor |
-
2018
- 2018-10-18 CN CN201821693125.7U patent/CN208818367U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542492A (en) * | 2019-10-10 | 2019-12-06 | 深圳市基础工程有限公司 | Fiber grating temperature sensor with built-in heat-conducting liquid |
| CN113588119A (en) * | 2021-06-29 | 2021-11-02 | 中国船舶重工集团公司第七一五研究所 | Method for measuring wall temperature of high-temperature part of aircraft engine based on femtosecond fiber bragg grating sensing |
| CN114152364A (en) * | 2021-11-05 | 2022-03-08 | 南京南瑞水利水电科技有限公司 | Temperature monitoring optical fiber sensor |
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