CN103134609A - High-sensitivity fiber bragg grating temperature sensor with adjustable sensitivity coefficient - Google Patents
High-sensitivity fiber bragg grating temperature sensor with adjustable sensitivity coefficient Download PDFInfo
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- CN103134609A CN103134609A CN2011103759320A CN201110375932A CN103134609A CN 103134609 A CN103134609 A CN 103134609A CN 2011103759320 A CN2011103759320 A CN 2011103759320A CN 201110375932 A CN201110375932 A CN 201110375932A CN 103134609 A CN103134609 A CN 103134609A
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- 230000035945 sensitivity Effects 0.000 title claims abstract description 17
- 239000000835 fiber Substances 0.000 title claims abstract description 16
- 239000013307 optical fiber Substances 0.000 claims abstract description 14
- 239000000523 sample Substances 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 229910001374 Invar Inorganic materials 0.000 claims description 4
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 4
- 230000006378 damage Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Abstract
The invention discloses a high-sensitivity fiber bragg grating temperature sensor with an adjustable sensitivity coefficient. The high-sensitivity fiber bragg grating temperature sensor comprises a temperature sensing probe, a transmission device and a display device. The temperature sensing probe comprises a fiber bragg grating, a transmission optical fiber, a low thermal expansion connector and a high thermal expansion connector, wherein the low thermal expansion connector and the high thermal expansion connector are respectively connected with the fiber bragg grating in face-to-face contact mode, and two signal output ends of the fiber bragg grating are respectively connected with the transmission optical fiber. When temperature changes, length changes of the low thermal expansion connector and the high thermal expansion connector are different, and the different change results are directly transferred to the fiber bragg grating (FBG). High-resolution and high-precision temperature measuring can be achieved by adjusting the lengths of the low thermal expansion connector and the high thermal expansion connector and selecting materials with different thermal expansion coefficients, and the accuracy can reach 0.05 DEG C. In addition, the high-sensitivity fiber bragg grating temperature sensor can achieve controllable adjustment on the sensitivity coefficient.
Description
Technical field
The present invention relates to a kind of temperature sensor, relate in particular to the adjustable high-sensitivity optical fibre grating temperature sensor of a kind of sensitivity coefficient, belong to the production field of temperature sensor.
Background technology
Temperature sensor is used very extensive, is used for realization to the monitoring temperature of product or environment.Present temperature sensor is of a great variety, such as comprising thermal resistance temperature sensor, thermocouple temperature sensor, bimetallic temperature transducer, infrared temperature sensor etc., these temperature sensors according to its separately different performance applications among different industries, closely bound up with our life, work.From the angle of technical advance, adopt in recent years optical fiber more and more to come into one's own as the temperature sensor of signal transport vehicle as path, employing light signal, this class temperature sensor is collectively referred to as fibre optic temperature sensor.
Existing fibre optic temperature sensor, although adopted the path of optical fiber as the signal transmission, but temperature sensing probe still adopts traditional temp probe, such as platinum resistance, copper resistance probe etc., its measuring accuracy is difficult to improve, when using in some comparison rugged environment, its stability is also not high enough, so be difficult to adapt to high precision, the high-stability requirement of modern industrial society.In addition, existing temperature sensor, its sensitivity degree can not be regulated.
Summary of the invention
The high-sensitivity optical fibre grating temperature sensor of purpose of the present invention with regard to being to provide a kind of sensitivity coefficient adjustable in order to address the above problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
The present invention includes temperature sensing probe, transmitting device and display device, described temperature sensing probe comprises Fiber Bragg Grating FBG, Transmission Fibers, low-thermal-expansion connector and high thermal expansion connector, described low-thermal-expansion connector be connected high thermal expansion connector and all be connected with described Fiber Bragg Grating FBG plane-plane contact, two signal output parts of described Fiber Bragg Grating FBG are connected with described Transmission Fibers respectively.
When temperature variation, the low-thermal-expansion connector is different with the length variations of high thermal expansion connector, and this different result of variations has been directly passed to Fiber Bragg Grating FBG (FBG).By the length of adjusting low-thermal-expansion connector and high thermal expansion connector and the material of selecting different heat expansion coefficient, can realize thermometric high precision, and can realize the controllable adjustment to sensitivity coefficient.
Particularly, described low-thermal-expansion connector be connected high thermal expansion connector and all paste with described Fiber Bragg Grating FBG and is connected, can avoid as far as possible like this destruction that the connection of other connected mode such as screw brings or induced signal and transmission are impacted.
Further, the area that contacts with described Fiber Bragg Grating FBG greater than described low-thermal-expansion connector of the area that contacts with described Fiber Bragg Grating FBG of described high thermal expansion connector.Make like this its response difference more obvious, measuring accuracy is higher.
As the best-of-breed technology scheme, described high thermal expansion connector and described low-thermal-expansion connector are metal connector; Described high thermal expansion connector is the nickel alloy connector, and described low-thermal-expansion connector is the invar alloy connector.
Beneficial effect of the present invention is:
Length and the material of selecting different heat expansion coefficient by low-thermal-expansion connector and high thermal expansion connector in adjustment the present invention can realize high resolving power of the present invention and high-precision temperature survey, and its precision can reach 0.05 ℃; Also can realize the controllable adjustment to sensitivity coefficient.
Description of drawings
Accompanying drawing is the structural representation of temperature sensing probe in the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing:
As shown in drawings, (transmitting device and display device are common apparatus to the present invention includes temperature sensing probe, transmitting device and display device, not shown), described temperature sensing probe comprises Fiber Bragg Grating FBG 2, Transmission Fibers 1, low-thermal-expansion connector 3 and high thermal expansion connector 4, low-thermal-expansion connector 3 be connected thermal expansion connector 4 and all be connected with Fiber Bragg Grating FBG 2 plane-plane contacts, two signal output parts of Fiber Bragg Grating FBG 2 are connected with Transmission Fibers 1 respectively.
As shown in drawings, low-thermal-expansion connector 3 is all pasted with Fiber Bragg Grating FBG 2 with high thermal expansion connector 4 and is connected, and can avoid as far as possible like this other connected mode such as screw connect the destruction of bringing or induced signal and transmission are impacted.
As shown in drawings, the area that contacts with Fiber Bragg Grating FBG 2 greater than low-thermal-expansion connector 3 of the area that contacts with Fiber Bragg Grating FBG 2 of high thermal expansion connector 4.Make like this its response difference more obvious, measuring accuracy is higher.
In the present embodiment, high thermal expansion connector 4 is the nickel alloy connector, and low-thermal-expansion connector 3 is the invar alloy connector.
By reference to the accompanying drawings, when temperature variation, low-thermal-expansion connector 3 is different with the length variations of high thermal expansion connector 4, and this different result of variations has been directly passed to Fiber Bragg Grating FBG 2.By the length of adjusting low-thermal-expansion connector 3 and high thermal expansion connector 4 and the material of selecting different heat expansion coefficient, can realize thermometric high precision, and can realize the controllable adjustment to sensitivity coefficient.
Claims (7)
1. high-sensitivity optical fibre grating temperature sensor that sensitivity coefficient is adjustable, comprise temperature sensing probe, transmitting device and display device, it is characterized in that: described temperature sensing probe comprises Fiber Bragg Grating FBG, Transmission Fibers, low-thermal-expansion connector and high thermal expansion connector, described low-thermal-expansion connector be connected high thermal expansion connector and all be connected with described Fiber Bragg Grating FBG plane-plane contact, two signal output parts of described Fiber Bragg Grating FBG are connected with described Transmission Fibers respectively.
2. the adjustable high-sensitivity optical fibre grating temperature sensor of sensitivity coefficient according to claim 1 is characterized in that: the low-thermal-expansion connector be connected high thermal expansion connector and all paste with described Fiber Bragg Grating FBG and be connected.
3. the adjustable high-sensitivity optical fibre grating temperature sensor of sensitivity coefficient according to claim 1 and 2, is characterized in that: the area that the area that described high thermal expansion connector contacts with described Fiber Bragg Grating FBG contacts with described Fiber Bragg Grating FBG greater than described low-thermal-expansion connector.
4. the adjustable high-sensitivity optical fibre grating temperature sensor of sensitivity coefficient according to claim 3, it is characterized in that: described high thermal expansion connector and described low-thermal-expansion connector are metal connector.
5. the adjustable high-sensitivity optical fibre grating temperature sensor of sensitivity coefficient according to claim 4, it is characterized in that: described high thermal expansion connector is the nickel alloy connector, and described low-thermal-expansion connector is the invar alloy connector.
6. the adjustable high-sensitivity optical fibre grating temperature sensor of sensitivity coefficient according to claim 1 and 2, it is characterized in that: described high thermal expansion connector and described low-thermal-expansion connector are metal connector.
7. the adjustable high-sensitivity optical fibre grating temperature sensor of sensitivity coefficient according to claim 6, it is characterized in that: described high thermal expansion connector is the nickel alloy connector, and described low-thermal-expansion connector is the invar alloy connector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103759320A CN103134609A (en) | 2011-11-23 | 2011-11-23 | High-sensitivity fiber bragg grating temperature sensor with adjustable sensitivity coefficient |
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| CN2011103759320A CN103134609A (en) | 2011-11-23 | 2011-11-23 | High-sensitivity fiber bragg grating temperature sensor with adjustable sensitivity coefficient |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241572A (en) * | 2015-10-13 | 2016-01-13 | 西安石油大学 | Monometallic fiber grating temperature sensor with double-sensitivity effect and wide range and packaging method thereof |
| CN107290076A (en) * | 2017-07-13 | 2017-10-24 | 兰州大学 | A kind of fiber-optical grating temperature sensor of extreme environment multimetering |
| CN110456498A (en) * | 2019-08-06 | 2019-11-15 | 南京英田光学工程股份有限公司 | Main Beam Expander System Based on Adjustable and Reverse Thermal Compensation for Thermal Distortion Control |
| CN111174898A (en) * | 2020-03-31 | 2020-05-19 | 山东省科学院激光研究所 | Vibrating wire type wide-frequency fiber laser vibration sensor and application thereof |
| CN117889898A (en) * | 2024-03-18 | 2024-04-16 | 中国地震局地球物理研究所 | Fiber bragg grating sensor for strain and temperature double-parameter measurement |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298999A (en) * | 2008-05-05 | 2008-11-05 | 中国地震局地壳应力研究所 | Method for making high-sensitivity optical fiber grating temperature sensor working in high and low temperature |
| CN202362093U (en) * | 2011-11-23 | 2012-08-01 | 成都酷玩网络科技有限公司 | High sensitivity fiber grating temperature sensor capable of adjusting sensitivity coefficient |
-
2011
- 2011-11-23 CN CN2011103759320A patent/CN103134609A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298999A (en) * | 2008-05-05 | 2008-11-05 | 中国地震局地壳应力研究所 | Method for making high-sensitivity optical fiber grating temperature sensor working in high and low temperature |
| CN202362093U (en) * | 2011-11-23 | 2012-08-01 | 成都酷玩网络科技有限公司 | High sensitivity fiber grating temperature sensor capable of adjusting sensitivity coefficient |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241572A (en) * | 2015-10-13 | 2016-01-13 | 西安石油大学 | Monometallic fiber grating temperature sensor with double-sensitivity effect and wide range and packaging method thereof |
| CN105241572B (en) * | 2015-10-13 | 2017-10-13 | 西安石油大学 | Monometallic dual sensitivity wide scope fiber-optical grating temperature sensor and its method for packing |
| CN107290076A (en) * | 2017-07-13 | 2017-10-24 | 兰州大学 | A kind of fiber-optical grating temperature sensor of extreme environment multimetering |
| CN107290076B (en) * | 2017-07-13 | 2023-08-15 | 兰州大学 | A fiber grating temperature sensor for multi-point measurement in extreme environments |
| CN110456498A (en) * | 2019-08-06 | 2019-11-15 | 南京英田光学工程股份有限公司 | Main Beam Expander System Based on Adjustable and Reverse Thermal Compensation for Thermal Distortion Control |
| CN111174898A (en) * | 2020-03-31 | 2020-05-19 | 山东省科学院激光研究所 | Vibrating wire type wide-frequency fiber laser vibration sensor and application thereof |
| CN117889898A (en) * | 2024-03-18 | 2024-04-16 | 中国地震局地球物理研究所 | Fiber bragg grating sensor for strain and temperature double-parameter measurement |
| CN117889898B (en) * | 2024-03-18 | 2024-05-28 | 中国地震局地球物理研究所 | Fiber bragg grating sensor for strain and temperature double-parameter measurement |
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Application publication date: 20130605 |