CN2135776Y - Optical fibre sensor - Google Patents
Optical fibre sensor Download PDFInfo
- Publication number
- CN2135776Y CN2135776Y CN 92229667 CN92229667U CN2135776Y CN 2135776 Y CN2135776 Y CN 2135776Y CN 92229667 CN92229667 CN 92229667 CN 92229667 U CN92229667 U CN 92229667U CN 2135776 Y CN2135776 Y CN 2135776Y
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- optical fiber
- temperature
- temperature sensor
- light
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model relates to an optical fiber temperature sensor, which is a measuring device for measuring various temperatures. The optical fiber temperature sensor adopts a macromolecule temperature sensitive material to coat at the outside of two optical fibers which are welded together, and the light is made to be input the reflecting face from one optical fiber and to be output from the other optical fiber. Because the refractivity of the novel temperature sensitive material changes under the temperature influence, the output light power and the temperature are in functional relation. The optical fiber temperature sensor has the characteristics of simple structure, small volume, light weight, convenient use, high sensitivity, good repeatability, strong anti-interference capability and explosion protection.
Description
The utility model is a low temperature during a kind of measurement mechanism particularly suitable of measuring temperature is measured.
Fibre optic temperature sensor is a new developing technology in recent years, also is to use one of maximum Fibre Optical Sensor in the industry.In low-temperature measurement, the most semiconductor material gallium arsenide (GaAs) that adopt of existing fibre optic temperature sensor are as measuring media.For example IEEE JOURNAL OF QUANTUM ELECTRONTCS VOL, QE-18, NO4, APRIL1982, the 676th page article " Fiber-optic Instrument, for Temperatrue, Measurement " in once introduced this fibre optic temperature sensor, shown in its structural representation Fig. 1.
1, be Transmission Fibers, the 2nd, GaAs material, the 3rd, outer tube.Though it is little that this sensor also has a volume, the reliability height, characteristics such as sensitivity, but because the Output optical power of this fibre optic temperature sensor and the relation that temperature is exponential function, therefore along with the rising of temperature, the variation of output power is more and more little, although people have added many compensation systems in the secondary instrument of measurement mechanism, but still can not address this problem so that more than temperature to 150 ℃, its practicality is just relatively poor very goodly.Moreover, this gallium arsenide sensor has certain requirement to the wavelength of light source, the spectral range of light source must just in time drop on the zone of gallium arsenide absorption edge, and see through of the rising of the light intensity of GaAs material with temperature, and reduce, and because the insertion of gallium arsenide has absorbed certain light intensity, thereby in whole transmission course bigger optical loss has been arranged.
The purpose of this utility model, the problem at above-mentioned existence provides a kind of volume little, in light weight, highly sensitive, simple in structure exactly, good reproducibility, low price, antijamming capability is strong, and is explosion-proof, novel optical fiber temperature sensor easy to use.
The technical solution of the utility model is, adopts macromolecule temperature sensing material a kind of and that optical fibre refractivity is complementary, is coated in the outside of fiber that two root beads are connected together.When temperature variation, the refractive index of coated material also changes, according to refraction law, the ratio of the sine of incident angle and the sine at refraction angle only depends on that the refractive index of two media is sin θ/sin θ=n2/n1, when light when optically denser medium enters optically thinner medium, the critical angle θ c of its total reflection is only relevant with the ratio of the refractive index of medium, and promptly sin θ c=n2/n1 is along with the rising of temperature, and the refractive index of temperature sensing material will diminish.According to above-mentioned law, can get the critical angle that bright dipping propagates and diminish in optical fiber, satisfy the light beam that total reflection propagates in the optical fiber and increase thereby make, therefore the light intensity of output increases, and the luminous power and the temperature of output are linear.Compare with above-mentioned gallium arsenide temperature sensor, the utility model has the advantages that the spectrum of temperature and light intensity is more directly perceived.In transmission course, there is not the loss of insertion; And light source there is not specific (special) requirements.Temperature measurement range of the present utility model is 0 ℃-220 ℃, and sensitivity is ± 0.2 ℃.
Structural representation of the present utility model is as shown in Figure 2:
The 1-Transmission Fibers, 2-fiber reflection face, 3-macromolecule temperature sensing material coating, 4-outer tube, 5-light source, 6-photoelectric detection system.
The infrared light that light source 5 sends is transferred to photoelectric detection system after 2 reflections of fiber reflection face,, change thereby make photoelectric detection system accept light intensity because the refractive index that the macromolecule temperature sensing material is coated with changes with variation of ambient temperature at fiber reflection face place.
Embodiment of the present utility model:
Micro-manufactured is adopted at its sensing head position, with two fused fiber splices together, forms the fiber reflection face, and luminous energy is exported by another root optical fiber behind this reflecting surface by an optical fiber input.On reflecting surface, apply one deck macromolecule temperature sensing material then, overlap the sleeve pipe of packing at last, connect light source and photoelectric detection system, can carry out temperature survey.
Claims (2)
1, a kind of measurement temperature fibre optic temperature sensor is characterized in that this device pulls the face of penetrating 2, macromolecule temperature sensing material coating 3, outer tube 4, light source 5, photoelectric detection system by Transmission Fibers 1, optical fiber and form.
2, according to the described device of claim 1, it is characterized in that two optical fiber of input and output of Transmission Fibers, be to weld together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92229667 CN2135776Y (en) | 1992-07-28 | 1992-07-28 | Optical fibre sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92229667 CN2135776Y (en) | 1992-07-28 | 1992-07-28 | Optical fibre sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2135776Y true CN2135776Y (en) | 1993-06-09 |
Family
ID=33772972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92229667 Expired - Lifetime CN2135776Y (en) | 1992-07-28 | 1992-07-28 | Optical fibre sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2135776Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458386C (en) * | 2003-07-09 | 2009-02-04 | 贺利氏电子耐特国际股份公司 | Method and apparatus for calibration and measurement of temperatures in melts by optical fibers |
| CN101647313A (en) * | 2007-03-12 | 2010-02-10 | Lma医疗创新有限公司 | The equipment and the method that are used for the temperature treatment of heating pad systems |
| US9408939B2 (en) | 2013-03-15 | 2016-08-09 | Medline Industries, Inc. | Anti-microbial air processor for a personal patient warming apparatus |
| WO2024087689A1 (en) * | 2022-10-28 | 2024-05-02 | 华为技术有限公司 | Detection method and related device |
-
1992
- 1992-07-28 CN CN 92229667 patent/CN2135776Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458386C (en) * | 2003-07-09 | 2009-02-04 | 贺利氏电子耐特国际股份公司 | Method and apparatus for calibration and measurement of temperatures in melts by optical fibers |
| CN101647313A (en) * | 2007-03-12 | 2010-02-10 | Lma医疗创新有限公司 | The equipment and the method that are used for the temperature treatment of heating pad systems |
| CN101647313B (en) * | 2007-03-12 | 2013-11-20 | 麦德林工业公司 | Device and method for temperature management of heating pad systems |
| US9408939B2 (en) | 2013-03-15 | 2016-08-09 | Medline Industries, Inc. | Anti-microbial air processor for a personal patient warming apparatus |
| WO2024087689A1 (en) * | 2022-10-28 | 2024-05-02 | 华为技术有限公司 | Detection method and related device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |