CN204613104U - A kind of light fibre humidity transducer based on dislocation welding - Google Patents
A kind of light fibre humidity transducer based on dislocation welding Download PDFInfo
- Publication number
- CN204613104U CN204613104U CN201520315383.1U CN201520315383U CN204613104U CN 204613104 U CN204613104 U CN 204613104U CN 201520315383 U CN201520315383 U CN 201520315383U CN 204613104 U CN204613104 U CN 204613104U
- Authority
- CN
- China
- Prior art keywords
- humidity
- polarization
- fiber
- mode fiber
- maintaining fiber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a kind of light fibre humidity transducer based on dislocation welding, it is made up of light source, incident single-mode fiber, polarization-maintaining fiber, humidity sensitive material, outgoing single-mode fiber, spectroanalysis instrument.When external environment humidity changes, the refractive index of the humidity sensitive material that polarization-maintaining fiber applies can change, the phase differential producing two parts light of interfering is caused to change, the peak wavelength of transmitted spectrum is finally caused to be moved, according to the relation between the humidity of demarcating in advance and peak wavelength drift value, can read external environment humidity, this device carrys out measures ambient humidity by the drift value of peak wavelength in monitoring transmitted spectrum.This light fibre humidity transducer has highly sensitive, and manufacture simple, cost is low, practicality advantages of higher.
Description
Technical field
The utility model relates to a kind of Fibre Optical Sensor, particularly relates to a kind of light fibre humidity transducer based on dislocation welding.
Background technology
Along with the development of optical fiber technology, light fibre humidity transducer is subject to greatly paying close attention to and being widely used.Rh value is as an important references index of environmental characteristic, and many industries all require accurately to measure it.Exact instrument is higher to environmental requirement, and ambient humidity must control in certain scope, to ensure that they normally work.In agricultural, humid control in the growth optimum range of crops, it is the essential condition improving output.Metering system mainly telescopic hair hygrometer and the vaporation-type psychrometer of current ambient humidity, telescopic hair hygrometer carries out moisture measurement according to mensuration material stroke difference when different humidity, and precision is not high; Vaporation-type psychrometer is the effect development that outwardly must absorb heat energy when utilizing moisture to evaporate, and volume is comparatively large, can not meet the requirement of world of miniaturization.Compared with above two kinds of hygrometers, light fibre humidity transducer there is closed light path and have that measuring accuracy is high, volume is little, lightweight, electromagnetism interference, the advantage such as resistance to chemical attack, can be applicable in various different environment.
Along with the development of optical fiber sensing technology, the Fibre Optical Sensor measuring humidity has a variety of, such as, utilize the strong evanscent field of taper micro-nano fiber to measure humidity; Plate humidity sensitive material after utilizing photonic crystal fiber to draw cone to measure; Use optical fibre Fabry-perot interference cavity as the high humidity sensor of sensing accuracy.But these light fibre humidity transducers have shortcoming, taper micro-nano fiber manufacture difficulty is large, and is easy to fracture; More difficult when photonic crystal fiber draws cone, and photonic crystal fiber is expensive, cost of manufacture is high; The complex manufacturing process in Fabry-Perot interference chamber.Therefore, these sensors are restricted in practice.
Summary of the invention
In order to solve above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of light fibre humidity transducer based on dislocation welding, this sensor has highly sensitive, and manufacture simple, cost is low, practicality advantages of higher.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of light fibre humidity transducer based on dislocation welding, comprises light source (1), incident single-mode fiber (2), polarization-maintaining fiber (3), humidity sensitive material (4), outgoing single-mode fiber (5) and spectroanalysis instrument (6).The output terminal of light source (1) is connected with the left end of incident single-mode fiber (2), the right-hand member of incident single-mode fiber (2) is connected with the left end of polarization-maintaining fiber (3), the right-hand member of polarization-maintaining fiber (3) is connected with the left end of outgoing single-mode fiber (5), and the right-hand member of outgoing single-mode fiber (5) is connected with the input end of spectroanalysis instrument (6); It is characterized in that, the right-hand member of described incident single-mode fiber (2) and the left end of polarization-maintaining fiber (3) are for misplacing welding structure, the right-hand member of polarization-maintaining fiber (3) and the left end of outgoing single-mode fiber (5), for misplacing welding structure, polarization-maintaining fiber (3) are coated with humidity sensitive material (4).
Described light source (1) is light emitting diode or laser diode, and wavelength coverage is 1200nm-1600nm.
Described dislocation welding structure, radial misalignments distance is 62 μm.
Described polarization-maintaining fiber (3), its model is panda type polarization-maintaining fiber PM1550, and length is 1mm to 2mm.
Described humidity sensitive material (4), its composition is shitosan, and chemical name is Chitosan (1-4)-2-amino-B-D.
Described spectroanalysis instrument (6), its maximum resolution is 10pm.
Beneficial effect of the present invention is:
1. adopt two dislocation welding structures, form two-beam interference, improve the sensitivity of humidity sensor;
2. sensing head only need make on optical fiber splicer, and manufacture simple, cost is low;
3. utilize humidity sensitive material to be coated between two dislocation welding structures, make transducing head structure more firm, improve practicality.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and embodiment thereof, the invention will be further described.
Fig. 1 is schematic diagram of the present utility model;
In figure, 1 is light source; 2 is incident single-mode fiber; 3 is polarization-maintaining fiber; 4 is humidity sensitive material; 5 is outgoing single-mode fiber; 6 is spectroanalysis instrument.
Specific implementation method
In Fig. 1, a kind of light fibre humidity transducer based on dislocation welding, comprises light source 1, incident single-mode fiber 2, polarization-maintaining fiber 3, humidity sensitive material 4, outgoing single-mode fiber 5, spectroanalysis instrument 6; The output terminal of light source 1 is connected with the left end of incident single-mode fiber 2, the incident right-hand member of single-mode fiber 2 is connected by the welding structure that misplaces with the left end of polarization-maintaining fiber 3, the right-hand member of polarization-maintaining fiber 3 is connected by the welding structure that misplaces with the left end of outgoing single-mode fiber 5, the right-hand member of outgoing single-mode fiber 5 is connected with the input end of spectroanalysis instrument 6, and polarization-maintaining fiber 3 is coated with humidity sensitive material 4.
Based on a light fibre humidity transducer for dislocation welding, its working method is: the light that light source 1 sends inputs incident single-mode fiber 2, and propagate with the form of basic mode in incident single-mode fiber 2, luminous energy is bound in fibre core.Light is when incident single-mode fiber 2 is transferred to polarization-maintaining fiber 3, and because optical fiber dislocation welding structure causes mould field not mated, a part of light enters the covering of polarization-maintaining fiber 3, excites cladding mode to transmit in the covering of polarization-maintaining fiber 3; Another part light enters humidity sensitive material 4, forms two-beam and propagates.Because the covering of polarization-maintaining fiber 3 is different from the refractive index of humidity sensitive material 4, the light path propagated of two-beam is different thus produce optical path difference; When two-beam is transferred to outgoing single-mode fiber 5, because dislocation welding structure causes two-beam to be coupled thus produces interference.Interference light input spectrum analyser 6, spectroanalysis instrument 6 shows the interference pattern of transmitted spectrum.When external environment humidity changes, the refractive index of humidity sensitive material 4 can change, and causes the phase differential producing two parts light of interfering to change, finally causes the peak wavelength of transmitted spectrum to be moved.According to the relation between the humidity of demarcating in advance and peak wavelength drift value, can read external environment humidity, this device carrys out measures ambient humidity by the drift value of peak wavelength in monitoring transmitted spectrum just.
Claims (3)
1. the light fibre humidity transducer based on dislocation welding, comprise light source (1), incident single-mode fiber (2), polarization-maintaining fiber (3), humidity sensitive material (4), outgoing single-mode fiber (5) and spectroanalysis instrument (6), the output terminal of light source (1) is connected with the left end of incident single-mode fiber (2), the right-hand member of incident single-mode fiber (2) is connected with the left end of polarization-maintaining fiber (3), the right-hand member of polarization-maintaining fiber (3) is connected with the left end of outgoing single-mode fiber (5), the right-hand member of outgoing single-mode fiber (5) is connected with the input end of spectroanalysis instrument (6), it is characterized in that, the right-hand member of described incident single-mode fiber (2) and the left end of polarization-maintaining fiber (3) are for misplacing welding structure, the right-hand member of polarization-maintaining fiber (3) and the left end of outgoing single-mode fiber (5), for misplacing welding structure, polarization-maintaining fiber (3) are coated with humidity sensitive material (4).
2. a kind of light fibre humidity transducer based on dislocation welding according to claim 1, described dislocation welding structure, radial misalignments distance is 62 μm.
3. a kind of light fibre humidity transducer based on dislocation welding according to claim 1, described polarization-maintaining fiber (3), its model is panda type polarization-maintaining fiber PM1550, and length is 1mm to 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520315383.1U CN204613104U (en) | 2015-05-12 | 2015-05-12 | A kind of light fibre humidity transducer based on dislocation welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520315383.1U CN204613104U (en) | 2015-05-12 | 2015-05-12 | A kind of light fibre humidity transducer based on dislocation welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204613104U true CN204613104U (en) | 2015-09-02 |
Family
ID=53965654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520315383.1U Expired - Fee Related CN204613104U (en) | 2015-05-12 | 2015-05-12 | A kind of light fibre humidity transducer based on dislocation welding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204613104U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092214A (en) * | 2016-08-29 | 2016-11-09 | 北京信息科技大学 | A kind of method utilizing single mode dislocation optical fiber simultaneously to measure temperature and material strain |
| CN106289408A (en) * | 2016-08-29 | 2017-01-04 | 北京信息科技大学 | A kind of utilize single mode dislocation optical fiber measure temperature and the method for solution refractive index simultaneously |
| CN106442364A (en) * | 2016-11-29 | 2017-02-22 | 中国计量大学 | Concentration sensor based on F-P (fabry-perot) cavity formed by optical fiber end face coating |
| CN106932364A (en) * | 2017-03-10 | 2017-07-07 | 吉林大学 | Tapered fiber liquid refractive index sensor is drawn in macrobending dislocation |
| CN106970028A (en) * | 2016-01-13 | 2017-07-21 | 中国计量学院 | Based on graphene oxide film and polarization correlated light fibre humidity transducer |
| CN107621447A (en) * | 2017-11-06 | 2018-01-23 | 中国计量大学 | A kind of optical fiber hypersensor of measurable liquid quality and humidity |
| CN110595518A (en) * | 2019-09-30 | 2019-12-20 | 东北大学 | Dislocation interference sensor based on intermode interference and preparation method thereof |
| CN110687076A (en) * | 2019-10-28 | 2020-01-14 | 中国科学院西安光学精密机械研究所 | Humidity sensor based on polymer optical fiber mode interferometer |
| CN114112313A (en) * | 2021-12-02 | 2022-03-01 | 中国电子科技集团公司第四十六研究所 | Single-polarization optical fiber transmission performance testing device and testing method |
| CN114112313B (en) * | 2021-12-02 | 2024-04-19 | 中国电子科技集团公司第四十六研究所 | Single polarization optical fiber transmission performance testing device and testing method |
-
2015
- 2015-05-12 CN CN201520315383.1U patent/CN204613104U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106970028A (en) * | 2016-01-13 | 2017-07-21 | 中国计量学院 | Based on graphene oxide film and polarization correlated light fibre humidity transducer |
| CN106092214A (en) * | 2016-08-29 | 2016-11-09 | 北京信息科技大学 | A kind of method utilizing single mode dislocation optical fiber simultaneously to measure temperature and material strain |
| CN106289408A (en) * | 2016-08-29 | 2017-01-04 | 北京信息科技大学 | A kind of utilize single mode dislocation optical fiber measure temperature and the method for solution refractive index simultaneously |
| CN106442364A (en) * | 2016-11-29 | 2017-02-22 | 中国计量大学 | Concentration sensor based on F-P (fabry-perot) cavity formed by optical fiber end face coating |
| CN106442364B (en) * | 2016-11-29 | 2023-04-18 | 中国计量大学 | Concentration sensor based on F-P cavity formed by coating film on end face of optical fiber |
| CN106932364A (en) * | 2017-03-10 | 2017-07-07 | 吉林大学 | Tapered fiber liquid refractive index sensor is drawn in macrobending dislocation |
| CN107621447A (en) * | 2017-11-06 | 2018-01-23 | 中国计量大学 | A kind of optical fiber hypersensor of measurable liquid quality and humidity |
| CN107621447B (en) * | 2017-11-06 | 2023-10-13 | 中国计量大学 | Optical fiber ultrasensitive sensor capable of measuring liquid quality and humidity |
| CN110595518A (en) * | 2019-09-30 | 2019-12-20 | 东北大学 | Dislocation interference sensor based on intermode interference and preparation method thereof |
| CN110687076A (en) * | 2019-10-28 | 2020-01-14 | 中国科学院西安光学精密机械研究所 | Humidity sensor based on polymer optical fiber mode interferometer |
| CN114112313A (en) * | 2021-12-02 | 2022-03-01 | 中国电子科技集团公司第四十六研究所 | Single-polarization optical fiber transmission performance testing device and testing method |
| CN114112313B (en) * | 2021-12-02 | 2024-04-19 | 中国电子科技集团公司第四十六研究所 | Single polarization optical fiber transmission performance testing device and testing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204613104U (en) | A kind of light fibre humidity transducer based on dislocation welding | |
| CN206618528U (en) | A kind of optical fiber air pressure sensing device based on multiple Fabry-Perot micro-cavities | |
| CN107515054B (en) | Optical fiber temperature and refractive index measurement sensing device based on Michelson interferometer | |
| CN104330101A (en) | Optical fiber sensor capable of measuring temperatures and micrometric displacement simultaneously | |
| CN103940530B (en) | A kind of temperature sensor based on hollow annular waveguide fiber | |
| CN201859117U (en) | Humidity sensor based on multimode interference SMS (single-mode multimode single-mode) optical fiber structure | |
| CN203287311U (en) | Double-cone fine-core single mode fiber based transmission-type optical fiber humidity sensor | |
| CN101936897B (en) | Humidity sensor based on tapered and injection type photonic crystal fiber | |
| CN203587177U (en) | Optical fiber liquid level sensor | |
| CN108572047A (en) | A kind of optical fiber air pressure sensing device based on multiple Fabry-Perot micro chambers | |
| CN104316106A (en) | Optical fiber sensor based on Mach-Zehnder interference and fiber bragg grating | |
| CN103969221A (en) | Optical fiber refractive index sensor based on single mode-fine core-multimode-single mode structure | |
| CN106568466A (en) | Fine core microstructure optical fiber interferometer sensor and temperature and strain detection method therefor | |
| CN203432906U (en) | Refractive index optical fiber sensing probe with tapering structure | |
| CN203908582U (en) | S-type taper embedded fiber Bragg grating two-parameter sensor | |
| CN103852191A (en) | Optical fiber temperature sensor insensitive to refractive index | |
| CN203657934U (en) | Reflection-type temperature/refractive index two-parameter sensing device employing long-period FBG based on Sagnac ring | |
| CN202126393U (en) | Refractive index sensor based on pull cone and pouring type photonic crystal optical fiber | |
| CN204881905U (en) | Temperature sensor of spherical structure optic fibre | |
| CN204556023U (en) | Based on two parameteric light fiber sensors of polarization maintaining optical fibre | |
| CN103308082A (en) | Sensing structure of single ring embedded resonant cavity coupling M-Z interferometer | |
| CN205826180U (en) | A kind of highly sensitive pressure sensor device | |
| CN114137273B (en) | Temperature-sensitive current eliminating sensing device of FBG cascade optical fiber composite structure | |
| CN109709499B (en) | Probe type vector magnetic field sensor based on fiber bragg grating and manufacturing method thereof | |
| CN208238740U (en) | The tapered optical fibre bending sensor of dual hump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150902 Termination date: 20160512 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |