CN105424218A - Double-beam interference type temperature measuring device for transformer - Google Patents
Double-beam interference type temperature measuring device for transformer Download PDFInfo
- Publication number
- CN105424218A CN105424218A CN201510889654.9A CN201510889654A CN105424218A CN 105424218 A CN105424218 A CN 105424218A CN 201510889654 A CN201510889654 A CN 201510889654A CN 105424218 A CN105424218 A CN 105424218A
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- China
- Prior art keywords
- fiber
- double
- temperature measuring
- type temperature
- interference type
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
Abstract
The invention discloses a double-beam interference type temperature measuring device for a transformer. The double-beam interference type temperature measuring device comprises a 980nm pump light source, wherein the 980nm pump light source is connected with a 980/1550nm wavelength division multiplexer, an Er-doped fiber ring, an optical isolator, an offset fiber, a first optical fiber coupler, a second optical fiber coupler and a third optical fiber coupler through fiber in the optical signal propagation direction in order; and the third optical fiber coupler is connected with a spectrum analyzer and the 980/1550nm wavelength division multiplexer through fiber. The double-beam interference type temperature measuring device for a transformer has the advantages of being simple in the double coupled structure, being low in manufacturing cost, being high in system compatibility and being low in related loss of polarization; and when the difference between the splitting ratio and the interference arm length for two couplers which form a filter takes a specific value, the function of a wavelength interlacing filter for outputting a flat waveform channel and the stability of the system is improved.
Description
Technical field
The invention belongs to transformer temperature measuring equipment technical field, be specifically related to a kind of transformer two-beam interference type temperature measuring equipment.
Background technology
Research at present based on the Fibre Optical Sensor of interference theory has obtained multinomial achievement in research, but also there is many problem demanding prompt solutions.The impacts such as fiber transmission attenuation, connecting loss, optical fiber vibration and multiple external environment can be subject to due to output signal, will seriously cause the irregularities of attenuated optical signal.Two-beam interference type Fibre Optical Sensor, multiple-mode interfence Fibre Optical Sensor and digital interferometric fiber optic sensors etc. are progressively applied in field of temperature measurement, but also there is many weak points, as, light path strict to the performance requirement of light source, optical fiber and signal processing system complicated, need to consider many factors.Due to the complicacy of interfering, the signal that sensor detects is very weak, and temperature resolution is not high, less stable, and these all cause cost increase and do not ensure the research of temperature sensor system.
Summary of the invention
The technical matters that the present invention solves there is provided a kind of transformer two-beam interference type temperature measuring equipment, by dislocation optical fiber structure, the light signal of interfering produces the laser of specific wavelength through coupling mechanism, then the performance of temperature-sensing system is studied by Output of laser wavelength corresponding under analysis different temperatures, two coupled structure resolution is high, stable performance and highly sensitive.
The present invention adopts following technical scheme for solving the problems of the technologies described above, a kind of transformer two-beam interference type temperature measuring equipment, it is characterized in that comprising 980nm pump light source, have 980/1550nm wavelength division multiplexer, Er-doped fiber ring, optical isolator, dislocation optical fiber, the first fiber coupler, the second fiber coupler and the 3rd fiber coupler by Fiber connection successively along lightray propagation direction, the 3rd fiber coupler is connected with 980/1550nm wavelength division multiplexer with spectroanalysis instrument respectively by optical fiber.
The two coupled structure of the present invention is simple, cost of manufacture is low, strong with system compatibility, Polarization Dependent Loss is little, when two coupling mechanism splitting ratios of composition wave filter and interference arm length difference get certain value, the function of the smooth interleaver of output waveform passage can be obtained, improve the stability of system.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1,980nm pump light source, 2,980/1550nm wavelength division multiplexer, 3, Er-doped fiber ring, 4, optical isolator, 5, misplace optical fiber, the 6, first fiber coupler, the 7, second fiber coupler, 8, the 3rd fiber coupler, 9, spectroanalysis instrument, 10, optical fiber.
Embodiment
Describe embodiment in detail by reference to the accompanying drawings.A kind of transformer two-beam interference type temperature measuring equipment, the light signal that 980nm pump light source 1 sends is first through 980/1550nm wavelength division multiplexer 2 and multiturn single mode Er-doped fiber ring 3, again by optical isolator 4, light signal is by single mode dislocation optical fiber 5 structure afterwards, optical fiber circulator through first fiber coupler 6 and the second fiber coupler 7 composition is selected to export, export through the 3rd fiber coupler 8 again, one road light signal is observed by spectroanalysis instrument 9, analyze corresponding optical maser wavelength to study the rule of this temp measuring system, another road light signal entered wavelength division multiplexer 2 by optical fiber 10 and again entered light path formation feedback.Light beam transmits along fibre core in a fiber, when light signal starts to decompose by during dislocation weld, one part optical signals enters covering and forms cladding mode, another part light signal enters fibre core and forms core mode, after light transmits a segment distance in a fiber, cladding mode and core mode are coupled in same optical fiber again, and two kinds of pattern light beams interfere at fibre core.Now there is the light signal of multiple different wave length in fibre core, through the filtering system Output of laser with selection specific wavelength of two coupling mechanism composition.
More than show and describe ultimate principle of the present invention, principal character and advantage, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these changes and improvements all fall into claimed scope of the present invention.
Claims (1)
1. a transformer two-beam interference type temperature measuring equipment, it is characterized in that comprising 980nm pump light source, have 980/1550nm wavelength division multiplexer, Er-doped fiber ring, optical isolator, dislocation optical fiber, the first fiber coupler, the second fiber coupler and the 3rd fiber coupler by Fiber connection successively along lightray propagation direction, the 3rd fiber coupler is connected with 980/1550nm wavelength division multiplexer with spectroanalysis instrument respectively by optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510889654.9A CN105424218A (en) | 2015-12-07 | 2015-12-07 | Double-beam interference type temperature measuring device for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510889654.9A CN105424218A (en) | 2015-12-07 | 2015-12-07 | Double-beam interference type temperature measuring device for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105424218A true CN105424218A (en) | 2016-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510889654.9A Pending CN105424218A (en) | 2015-12-07 | 2015-12-07 | Double-beam interference type temperature measuring device for transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN105424218A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596567A (en) * | 2018-12-19 | 2019-04-09 | 北京航天易联科技发展有限公司 | A kind of methane laser detection device |
| CN112383358A (en) * | 2020-11-11 | 2021-02-19 | 中国科学院上海微系统与信息技术研究所 | Integrated optical transceiver |
| CN112393692A (en) * | 2019-08-14 | 2021-02-23 | Oppo广东移动通信有限公司 | Laser projection module, image acquisition module, depth camera and electronic equipment |
-
2015
- 2015-12-07 CN CN201510889654.9A patent/CN105424218A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109596567A (en) * | 2018-12-19 | 2019-04-09 | 北京航天易联科技发展有限公司 | A kind of methane laser detection device |
| CN112393692A (en) * | 2019-08-14 | 2021-02-23 | Oppo广东移动通信有限公司 | Laser projection module, image acquisition module, depth camera and electronic equipment |
| CN112393692B (en) * | 2019-08-14 | 2023-04-28 | Oppo广东移动通信有限公司 | Laser projection module, image acquisition module, depth camera and electronic equipment |
| CN112383358A (en) * | 2020-11-11 | 2021-02-19 | 中国科学院上海微系统与信息技术研究所 | Integrated optical transceiver |
| CN112383358B (en) * | 2020-11-11 | 2022-03-25 | 中国科学院上海微系统与信息技术研究所 | Integrated optical transceiver |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160323 |