CN103134608A - High-stability double-barreled fiber bragg grating temperature sensor - Google Patents
High-stability double-barreled fiber bragg grating temperature sensor Download PDFInfo
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- CN103134608A CN103134608A CN2011103759195A CN201110375919A CN103134608A CN 103134608 A CN103134608 A CN 103134608A CN 2011103759195 A CN2011103759195 A CN 2011103759195A CN 201110375919 A CN201110375919 A CN 201110375919A CN 103134608 A CN103134608 A CN 103134608A
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- inner sleeve
- bragg grating
- fiber bragg
- temperature sensor
- fiber grating
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Abstract
The invention discloses a high-stability double-barreled fiber bragg grating temperature sensor which comprises a temperature sensing probe, a transmission device and a display device. The temperature sensing probe comprises an outer sleeve, an inner sleeve, transmission optical fibers and a fiber bragg grating, wherein the fiber bragg grating is arranged in the inner sleeve which is arranged in the outer sleeve, two ends of the fiber bragg grating are respectively connected with the transmission optical fibers, and the inner sleeve and the outer sleeve are both efficient heat-conduction sleeves. The outer sleeve isolates the effect on the inner sleeve caused by external stress stain, the external force cannot be transmitted to the fiber bragg grating through the inner sleeve, and simultaneously the temperature can be transmitted to the fiber bragg grating through the outer sleeve and the inner sleeve, so that the wavelength of the fiber bragg grating can be shifted responding to temperature changing. The high-stability double-barreled fiber bragg grating temperature sensor avoids the influence to temperature sensing caused by applied stress, the sensitivity reaches 9.8pm/DEG C, the resolution ratio reaches 0.102 DEG C, the linearity reaches 99.88%, and the repeatability error is as low as 1.55%.
Description
Technical field
The present invention relates to a kind of temperature sensor, relate in particular to a kind of high-stability double-tube type optical fiber grating temperature sensor, 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.
Summary of the invention
Purpose of the present invention provides a kind of high-stability double-tube type optical fiber grating temperature sensor with regard to being 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 outer tube, inner sleeve, Transmission Fibers and fiber grating, described fiber grating is placed in described inner sleeve, described inner sleeve is placed in described outer tube, the two ends of described fiber grating are connected with described Transmission Fibers respectively, and described inner sleeve and described outer tube are the high-efficiency heat conduction sleeve pipe.
In the course of work, outer tube has been isolated the effect of applied stress strain to inner tube, avoided external force to pass to fiber grating by inner tube, simultaneously, temperature still can pass to fiber grating by outer tube and inner sleeve, thereby make the wavelength response temperature variation of fiber grating and produce displacement, reach the purpose of detected temperatures.
As the best-of-breed technology scheme, the two ends of described outer tube also are provided with the post that is tightly connected, and described Transmission Fibers is naked fibre two described parts that are tightly connected between post, and remainder all is placed in optical cable.So not only be convenient to install, and stability is high.
As preferably, described being tightly connected used the fluid sealant bonding connection between post and described outer tube; Use the fluid sealant bonding connection between described inner sleeve and described outer tube.Easy to process, stable performance.
Further, described inner sleeve and described outer tube are metal sleeve; Optimal selection is copper sleeve.Its heat-conductive characteristic is good, and has good intensity.
Beneficial effect of the present invention is:
The present invention utilizes fiber grating as temperature sensitive member, and the temperature sensor signal, take infrared light as medium, be converted into electric signal with temperature signal exactly, thereby realizes the purpose of detected temperatures; And stopped the impact of applied stress on temperature sense by inside and outside double pipe structure, and its measuring accuracy is high, and sensitivity can reach 9.8pm/ ℃, 0.102 ℃ of resolution, the linearity can reach 99.88%, and reproducibility error is low to moderate 1. 55%.
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, the present invention includes temperature sensing probe, transmitting device and display device (transmitting device and display device are not shown in the drawings), described temperature sensing probe comprises outer tube 6, inner sleeve 7, Transmission Fibers and fiber grating 5, fiber grating 5 is placed in inner sleeve 7, inner sleeve 7 is placed in outer tube 6, the two ends of fiber grating 5 are connected with naked fine 3 of Transmission Fibers respectively, and inner sleeve 7 and outer tube 6 are copper sleeve.
As shown in drawings, the two ends of outer tube 6 also are provided with the post 2 that is tightly connected, and Transmission Fibers is naked fine 3 two parts that are tightly connected between post 2, and remainder all is placed in optical cable 1.So not only be convenient to install, and stability is high.
As shown in drawings, be tightly connected between post 2 and outer tube 6, all use fluid sealant 4 bonding connections between inner sleeve 7 and outer tube 6.With fluid sealant 4 bonding connections, easy to process, stable performance.
By reference to the accompanying drawings, the present invention in the course of the work, outer tube 6 can be isolated the applied stress strain to the effect of inner sleeve 7, has avoided external force to pass to fiber grating 5 by inner sleeve 7; Simultaneously, temperature still can pass to fiber grating 5 by outer tube 6 and inner sleeve 7, thereby makes the wavelength response temperature variation of fiber grating 5 and produce displacement, reaches the purpose of detected temperatures.
Claims (6)
1. high-stability double-tube type optical fiber grating temperature sensor, comprise temperature sensing probe, transmitting device and display device, it is characterized in that: described temperature sensing probe comprises outer tube, inner sleeve, Transmission Fibers and fiber grating, described fiber grating is placed in described inner sleeve, described inner sleeve is placed in described outer tube, the two ends of described fiber grating are connected with described Transmission Fibers respectively, and described inner sleeve and described outer tube are the high-efficiency heat conduction sleeve pipe.
2. high-stability double-tube type optical fiber grating temperature sensor according to claim 1, it is characterized in that: the two ends of described outer tube also are provided with the post that is tightly connected, described Transmission Fibers is naked fibre two described parts that are tightly connected between post, and remainder all is placed in optical cable.
3. high-stability double-tube type optical fiber grating temperature sensor according to claim 1, it is characterized in that: described being tightly connected used the fluid sealant bonding connection between post and described outer tube.
4. high-stability double-tube type optical fiber grating temperature sensor according to claim 1, is characterized in that: use the fluid sealant bonding connection between described inner sleeve and described outer tube.
5. according to claim 1 or 4 described high-stability double-tube type optical fiber grating temperature sensors, it is characterized in that: described inner sleeve and described outer tube are metal sleeve.
6. high-stability double-tube type optical fiber grating temperature sensor according to claim 5, it is characterized in that: described inner sleeve and described outer tube are copper sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103759195A CN103134608A (en) | 2011-11-23 | 2011-11-23 | High-stability double-barreled fiber bragg grating temperature sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103759195A CN103134608A (en) | 2011-11-23 | 2011-11-23 | High-stability double-barreled fiber bragg grating temperature sensor |
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| CN103134608A true CN103134608A (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103759195A Pending CN103134608A (en) | 2011-11-23 | 2011-11-23 | High-stability double-barreled fiber bragg grating temperature sensor |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126666A (en) * | 2007-09-27 | 2008-02-20 | 天津大学 | High sensitivity optical fiber temperature sensor |
| CN201408093Y (en) * | 2009-05-12 | 2010-02-17 | 昆明理工大学 | Double-tube type optical fiber Bragg grating temperature sensor insensitive to external stress strain |
| CN202329867U (en) * | 2011-11-23 | 2012-07-11 | 成都酷玩网络科技有限公司 | High-stability double-tube type optical fiber grating temperature sensor |
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2011
- 2011-11-23 CN CN2011103759195A patent/CN103134608A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101126666A (en) * | 2007-09-27 | 2008-02-20 | 天津大学 | High sensitivity optical fiber temperature sensor |
| CN201408093Y (en) * | 2009-05-12 | 2010-02-17 | 昆明理工大学 | Double-tube type optical fiber Bragg grating temperature sensor insensitive to external stress strain |
| CN202329867U (en) * | 2011-11-23 | 2012-07-11 | 成都酷玩网络科技有限公司 | High-stability double-tube type optical fiber grating temperature sensor |
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Application publication date: 20130605 |