CN101261117A - Strain sensor based on porous microstructure optical fiber - Google Patents
Strain sensor based on porous microstructure optical fiber Download PDFInfo
- Publication number
- CN101261117A CN101261117A CNA2008100362596A CN200810036259A CN101261117A CN 101261117 A CN101261117 A CN 101261117A CN A2008100362596 A CNA2008100362596 A CN A2008100362596A CN 200810036259 A CN200810036259 A CN 200810036259A CN 101261117 A CN101261117 A CN 101261117A
- Authority
- CN
- China
- Prior art keywords
- porous microstructure
- optical fiber
- strain
- microstructure optical
- 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.)
- Pending
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 91
- 239000000835 fiber Substances 0.000 claims abstract description 51
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000009795 derivation Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 230000005670 electromagnetic radiation Effects 0.000 abstract 1
- 239000010453 quartz Substances 0.000 abstract 1
- 230000008859 change Effects 0.000 description 12
- 238000000411 transmission spectrum Methods 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 239000004038 photonic crystal Substances 0.000 description 5
- 235000001759 Citrus maxima Nutrition 0.000 description 4
- 244000276331 Citrus maxima Species 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000013519 translation Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000009514 concussion Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 241000931705 Cicada Species 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
Abstract
The strain sensor based on the porous microstructure optical fiber is characterized by comprising a light source, a lead-in single-mode optical fiber, the porous microstructure optical fiber, a lead-out single-mode optical fiber and a photoelectric detector which are sequentially connected in series, wherein the porous microstructure optical fiber is a pure quartz fiber core surrounded by a circle of fan-shaped air holes, and the edge of the fiber core is of a ratchet-shaped structure. The invention can measure the tensile, bending and torsional strain and has the advantages of high sensitivity, high temperature resistance and electromagnetic radiation resistance.
Description
Technical field
The invention belongs to sensing technology, is a kind of strain transducer based on porous microstructure optical fibre, can be applied to static and dynamic radially, axially, the sensing of distortion, bending strain and stress.
Background technology
Fibre Optical Sensor all has broad prospect of application owing to have that anti-electromagnetic interference capability is strong, highly sensitive, electrical insulating property is good, safe and reliable, corrosion-resistant, can constitute plurality of advantages such as optical fiber sensor network in each fields such as industry, agricultural, biologic medical, national defence.
Fibre optic strain sensor has several like this technical schemes at present haply, comprise Fiber Bragg Grating FBG (FiberBragg Grating, abbreviate FBG as), long-period gratings (Long Period Grating, abbreviate LPG as), Mach-Zehnder interferometer (Mach-Zehnder Interferometer, abbreviate MZ-I as) and optical fiber Sagnac ring etc., although its structure is had nothing in common with each other, in fact all be based on and interfere relevant principle.In multimode optical fiber, because different communication modes has different propagation constants, the mutual interference between pattern also can be applicable to the sensing of strain.Utilize the pattern in the multimode optical fiber to interfere the realization strain sensing that the multiple technologies route is arranged, one of them method commonly used is single mode-multi-mode-single mode optical fiber structure (single mode-multimode-single mode fiber is designated hereinafter simply as SMS).Just multimode optical fiber is serially connected between two single-mode fibers, wherein a single-mode fiber is in order to import light field, and an other single-mode fiber is in order to derive light field.In the SMS optical fiber structure, owing to can have a more than transmission mode in the multimode optical fiber, the effect of interfering mutually between the pattern can cause light field to form comparatively complicated space distribution at the endpiece of optical fiber, and this distribution is commonly referred to as speckle.Simultaneously, because the fibre core aperture of deriving single-mode fiber is less than multimode optical fiber, speckle energy that can only receiving unit, and the shape of speckle and position can change along with lambda1-wavelength, so whole SMS optical fiber structure has uneven transmission spectrum.The transmitance of spectrum is vibrated up and down with wavelength, and its cycle is relevant with the length of multimode optical fiber.Multimode optical fiber is applied strain, and therefore each transmission mode all can change, and cause the space distribution of speckle to produce respective change, thereby the transmission spectrum of total also has respective change.If use monochromatic source or multilongitudianl-mode laser light source, the change of transmission spectrum will cause the variation of emergent light power, detects this optical power change and can realize strain sensing.
The research of the new optical fiber of a class in recent years,---microstructured optical fibers becomes a focus.Exist the airport that much passes through whole fiber lengths in microstructured optical fibers, the leaded light mechanism of microstructured optical fibers just relies on the quartzy microstructure of this air.At present, in the research that has launched some explorations aspect the microstructured optical fibers ess-strain amount sensing, there are FBG and the LPG in the photonic crystal fiber, multi-core fiber or the like in the major technology path.
One of technology formerly, [Optical Fiber Communication Conference such as Byung Hyuk Park, 2005.Technical Digest.OFC/NFOEC 4:3-5] in photonic crystal fiber, write LPG, install in this when applying strain, the position of the resonance peak of LPG can change with strain, but the direction that changes is different with LPG in the ordinary optic fibre.Although this unique phenomenon has potential using value, compared with prior art, advantage is also not obvious.
Formerly two of technology, [Smart Mater.Struct., 2000,9:132-140] such as P M Blanchard utilizes the relative position of several hot spots of multi-core fiber to realize the sensing of two-dimentional dependent variable, but the rule that facula position changes is comparatively complicated, brings difficulty to demodulation.
Formerly three of technology, [APPLIED OPTICS, 2007,46:2516-2519] such as Yu Liu utilizes graded index (the SMS-Based optical fiber structure realized strain and temperature sensing for Graded Index, GI) multimode optical fiber.But the transmission spectrum of its device is more smooth, and shock range approximately has only 0.4dB, and its concussion cycle is bigger, reaches tens nanometers, so sensitivity is not high.
Formerly four of technology, [OPTIC LETTERS, 2006,313:305-307] such as Joel Villatoro utilizes the index guide structure type photonic crystal fiber of fused biconical taper, and the SMS-Based optical fiber structure has been realized strain sensing.The advantage of this structure is that the transmission spectrum shock range is big, and the concussion cycle is little, so sensitivity is higher.This device is insensitive to temperature variation simultaneously, has avoided influence of temperature variation.But its used photonic crystal fiber price is comparatively expensive, and its fused biconical taper technology is difficult to control.
A kind of in the porous microstructure optical fibre is so-called shaddock optical fiber, being characterized as of this optical fiber: the macropore of a circle around fibre core arranged in covering, the shape in hole can be circular also can be to approach fan-shaped shape, the number in hole does not wait to tens from several, because the shape of cross section of optic fibre similarly is the shaddock that cuts, so name shaddock optical fiber, as shown in Figure 1.The fibre core of shaddock optical fiber can be a fiber core with single-mold of mixing germanium, also can be the pure quartzy multimode fibre core that constitutes.Because the airport size in the covering is bigger, can in microstructured optical fibers, inject liquid and polymkeric substance easily to form some property, such as adjustable double refraction, attenuator or the like function, also test substance can be injected the hole of microstructured optical fibers, realize gas phase or liquid phase substance sensing.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiency of above-mentioned technology formerly, a kind of strain transducer based on porous microstructure optical fibre is provided, this strain transducer can be measured various types of strains as stretching, bending, torsional strain etc., should have the advantage of highly sensitive, high temperature resistant and anti-electromagnetic-radiation.，
Technical solution of the present invention is as follows:
A kind of strain transducer based on porous microstructure optical fibre, be characterized in by light source, importing single-mode fiber, porous microstructure optical fibre, derivation single-mode fiber and the photodetector of polyphone constitute successively, described porous microstructure optical fibre is to have the cingens pure silica core of a fan-shaped airport of circle, and the edge of fibre core presents the ratchet-like structure.
The coupling part of described porous microstructure optical fibre and single-mode fiber is welding, or square butt joint.
Described light source is single longitudinal mode or many longitudinal modes light source.
The structure of described porous microstructure optical fibre microstructured optical fibers is the cingens pure silica core of a fan-shaped airport of circle as shown in Figure 1, and the edge of fibre core presents unique ratchet-like structure.The leaded light mechanism of this optical fiber is based on the total internal reflection on the quartzy air interface, because the refringence very big (about 0.45) of quartzy and air, and the refringence between fibre core and covering only has 0.003 in the general optical fiber, therefore, for the light wave of identical wavelength and the fibre core of same diameter, the waveguide normalized frequency of this optical fiber is much larger than ordinary optic fibre.At near-infrared band, this optical fiber can hold extremely many transmission modes, and it is thousands of that its number can reach.In addition, the fiber core cross section of this optical fiber has unique ratchet-like edge, and the optical waveguide border of this special shape makes the almost distribution of each communication mode on xsect all very complicated.Number has the result that communication mode that complex space distributes interferes mutually greatly and has caused the speckle of microstructured optical fibers more in small, broken bits with respect to common step and graded index multimode fiber.So the transmission spectrum shock range of microstructured optical fibers is very big, can reach more than the 10dB, the cycle of shaking simultaneously is littler, has only 1/tens of the common multimode optical fiber of same length.When microstructured optical fibers was applied strain, the propagation distance of light wave in the propagation constant of each pattern and the optical fiber comprised total propagation distance, and propagation distance distribution radially all can change thereupon.For the injection light of certain fixed frequency or the many longitudinal modes light source with several fixed frequencies, a small strain will allow the power that sees through of device that very big change takes place, and surveying this optical power change just can the demodulation dependent variable.
Advantage of the present invention and characteristics are:
(1) characteristic of the microstructured optical fibers among the present invention comprises big refringence and ratchet-like optical waveguide border between fibre core and covering, can hold the communication mode of squillion and cause complicated electromagnetic field to distribute.Therefore, Gou Zao fiber stress and strain sensing device have the sensitivity higher than common multimode optical fiber thus.
(2) the present invention adopts full optical fiber approach, has realized insulation isolation detection, can be applicable to the sensing of high voltage, high-intensity magnetic field.
(3) the used microstructured optical fibers of the present invention is pure quartzy air structure, does not mix in the fibre core, can at high temperature not produce the phenomenon that alloy runs off as ordinary optic fibre, is specially adapted to the high temperature occasion.
(4) with respect to the stress and the strain sensing device that use photonic crystal fiber, the microstructured optical fibers price that the present invention uses is comparatively cheap, helps applying.
Description of drawings
Fig. 1 is the cross-sectional structure of microstructured optical fibers
Fig. 2 is the structural representation that the present invention is based on the strain transducer of porous microstructure optical fibre
Fig. 3 be the present invention the strain kind synoptic diagram that can respond
Fig. 4 is an Application Example 1--microstructured optical fibers tensile strain sensor synoptic diagram of the present invention
Fig. 5 is an Application Example 2--microstructured optical fibers bending strain sensor synoptic diagram of the present invention
Fig. 6 is an Application Example 3--microstructured optical fibers torsional strain sensor synoptic diagram of the present invention
Embodiment
The invention will be further described below in conjunction with embodiment and accompanying drawing, and Dan Buying limits protection scope of the present invention with this.
See also Fig. 2 earlier, as seen from the figure, the strain transducer that the present invention is based on porous microstructure optical fibre is by light source 1, importing single-mode fiber 2, porous microstructure optical fibre 3, derivation single-mode fiber 4 and the photodetector 5 of polyphone constitute successively, described porous microstructure optical fibre 3 is to have the cingens pure silica core of a fan-shaped airport of circle, and the edge of fibre core presents the ratchet-like structure.
Strain transducer based on porous microstructure optical fibre shown in Figure 2, the coupling part of described porous microstructure optical fibre and single-mode fiber is welding.Described light source 1 is single longitudinal mode or many longitudinal modes light source.
Fig. 3 be the present invention the strain kind synoptic diagram that can respond, light wave that light source 1 sends spreads into porous microstructure optical fibre 3 through single-mode fiber 2, various forms of strains put on the porous microstructure optical fibre 3, comprise tensile strain, bending strain, torsional strain or the like, the pattern of the exit end speckle field of porous microstructure optical fibre 3 can change along with strain, derive single-mode fiber 4 can only receive certain fixed space zone as a spatial filter luminous energy, can respond the variation of speckle field, light intensity detects with photodetector 5.By the light intensity that records can inverting optical fiber strain.
Fig. 4 is an Application Example 1--microstructured optical fibers tensile strain sensor synoptic diagram of the present invention, the two ends fastener 7 of porous microstructure optical fibre 3 and 8 or tackifier be fixed on the member 6.When tensile strain puts on member 6, porous microstructure optical fibre 3 keeps the strain identical with member 6.Tensile strain can the modifier transmission spectrum shape, but can make transmission spectrum produce translation.For the light source of certain fixed wave length or have many longitudinal modes light source 1 of several fixed wave length, the translation meeting of transmission spectrum causes the variation of device output power.By measuring the variation of deriving single-mode fiber 4 received optical powers, can be finally inversed by the tensile strain of optical fiber, also just obtained the tensile strain of member 6.
Claims (3)
1, a kind of strain transducer based on porous microstructure optical fibre, it is characterized in that by light source (1), importing single-mode fiber (2), porous microstructure optical fibre (3), derivation single-mode fiber (4) and the photodetector (5) of polyphone constitute successively, described porous microstructure optical fibre (3) is to have the cingens pure silica core of a fan-shaped airport of circle, and the edge of fibre core presents the ratchet-like structure.
2, the strain transducer based on porous microstructure optical fibre according to claim 1, the coupling part that it is characterized in that described porous microstructure optical fibre and single-mode fiber is welding, or square butt joint.
3, the strain transducer based on porous microstructure optical fibre according to claim 1 is characterized in that described light source (1) is single longitudinal mode or many longitudinal modes light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100362596A CN101261117A (en) | 2008-04-18 | 2008-04-18 | Strain sensor based on porous microstructure optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100362596A CN101261117A (en) | 2008-04-18 | 2008-04-18 | Strain sensor based on porous microstructure optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101261117A true CN101261117A (en) | 2008-09-10 |
Family
ID=39961721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100362596A Pending CN101261117A (en) | 2008-04-18 | 2008-04-18 | Strain sensor based on porous microstructure optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101261117A (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102096150A (en) * | 2010-12-22 | 2011-06-15 | 北京大学 | Multi-core fiber based optical transmission structure and device applying same |
| CN102288136A (en) * | 2011-08-08 | 2011-12-21 | 哈尔滨工程大学 | Torsion sensor based on asymmetric double core optical fiber |
| CN102374874A (en) * | 2011-09-20 | 2012-03-14 | 重庆大学 | Quartz capillary tube embedded all-silica fiber Fabry-Perot interferometric sensor and manufacturing method thereof |
| CN102494816A (en) * | 2011-11-20 | 2012-06-13 | 北京航空航天大学 | Pressure sensing method based on photonic crystal fibers and sensor |
| CN102967584A (en) * | 2012-10-26 | 2013-03-13 | 中国计量学院 | Volatile organic matter sensing method and device based on photonic crystal fiber embedded interferometer |
| CN103472528A (en) * | 2013-09-30 | 2013-12-25 | 北京首量科技有限公司 | High-double-refraction photonic quasicrystal fiber with grapefruit air holes |
| CN103502789A (en) * | 2010-12-30 | 2014-01-08 | Lmwp专利控股有限公司 | Wind turbine blade with optical sensor system |
| CN103712575A (en) * | 2014-01-08 | 2014-04-09 | 天津大学 | Optic bending curvature testing method and sensor |
| CN104105943A (en) * | 2012-02-10 | 2014-10-15 | 奥林巴斯株式会社 | Optical sensor |
| CN104864999A (en) * | 2015-06-11 | 2015-08-26 | 毛嘉 | Tension sensor based on kagome fiber bragg grating |
| CN106546187A (en) * | 2016-10-19 | 2017-03-29 | 暨南大学 | A kind of LPFG curvature sensor and its detection method |
| CN108195411A (en) * | 2017-12-29 | 2018-06-22 | 北京信息科技大学 | The Microstructure Sensor of fiber F-P cavity cascade FBG is inscribed based on femtosecond |
| CN109541752A (en) * | 2018-11-06 | 2019-03-29 | 重庆邮电大学 | A kind of variable optical attenuator based on all -fiber light control system |
| CN109839074A (en) * | 2017-11-24 | 2019-06-04 | 桂林电子科技大学 | A kind of white light interference formula fiber integrates universal bending sensor |
| CN111272105A (en) * | 2020-02-10 | 2020-06-12 | 山西大学 | Micro-nano fiber-based torsion sensor, preparation method and measurement method |
| WO2020184396A1 (en) * | 2019-03-12 | 2020-09-17 | 古河電気工業株式会社 | Pressure sensor |
| CN112317285A (en) * | 2020-10-27 | 2021-02-05 | 天津大学 | High-directivity optical fiber photoacoustic transducer and method |
| CN112747848A (en) * | 2018-07-02 | 2021-05-04 | 上海交通大学 | Pressure sensor based on flexible polymer waveguide |
-
2008
- 2008-04-18 CN CNA2008100362596A patent/CN101261117A/en active Pending
Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102096150B (en) * | 2010-12-22 | 2013-04-17 | 北京大学 | Multi-core fiber based optical transmission structure and device applying same |
| CN102096150A (en) * | 2010-12-22 | 2011-06-15 | 北京大学 | Multi-core fiber based optical transmission structure and device applying same |
| CN103502789B (en) * | 2010-12-30 | 2016-12-14 | Lm Wp 专利控股有限公司 | For the method and apparatus determining the load of wind turbine blade |
| CN103502789A (en) * | 2010-12-30 | 2014-01-08 | Lmwp专利控股有限公司 | Wind turbine blade with optical sensor system |
| CN102288136B (en) * | 2011-08-08 | 2013-03-06 | 哈尔滨工程大学 | Torsion sensor based on asymmetric double core optical fiber |
| CN102288136A (en) * | 2011-08-08 | 2011-12-21 | 哈尔滨工程大学 | Torsion sensor based on asymmetric double core optical fiber |
| CN102374874A (en) * | 2011-09-20 | 2012-03-14 | 重庆大学 | Quartz capillary tube embedded all-silica fiber Fabry-Perot interferometric sensor and manufacturing method thereof |
| CN102494816A (en) * | 2011-11-20 | 2012-06-13 | 北京航空航天大学 | Pressure sensing method based on photonic crystal fibers and sensor |
| CN102494816B (en) * | 2011-11-20 | 2015-03-04 | 北京航空航天大学 | Pressure sensing method based on photonic crystal fibers and sensor |
| CN104105943A (en) * | 2012-02-10 | 2014-10-15 | 奥林巴斯株式会社 | Optical sensor |
| CN102967584A (en) * | 2012-10-26 | 2013-03-13 | 中国计量学院 | Volatile organic matter sensing method and device based on photonic crystal fiber embedded interferometer |
| CN103472528A (en) * | 2013-09-30 | 2013-12-25 | 北京首量科技有限公司 | High-double-refraction photonic quasicrystal fiber with grapefruit air holes |
| CN103472528B (en) * | 2013-09-30 | 2016-03-30 | 北京首量科技有限公司 | The accurate brilliant optical fiber of a kind of high birefringence photon with grape fruit airport |
| CN103712575B (en) * | 2014-01-08 | 2016-08-17 | 天津大学 | The bending curvature method of testing of optics and sensor |
| CN103712575A (en) * | 2014-01-08 | 2014-04-09 | 天津大学 | Optic bending curvature testing method and sensor |
| CN104864999A (en) * | 2015-06-11 | 2015-08-26 | 毛嘉 | Tension sensor based on kagome fiber bragg grating |
| CN106546187A (en) * | 2016-10-19 | 2017-03-29 | 暨南大学 | A kind of LPFG curvature sensor and its detection method |
| CN109839074A (en) * | 2017-11-24 | 2019-06-04 | 桂林电子科技大学 | A kind of white light interference formula fiber integrates universal bending sensor |
| CN108195411A (en) * | 2017-12-29 | 2018-06-22 | 北京信息科技大学 | The Microstructure Sensor of fiber F-P cavity cascade FBG is inscribed based on femtosecond |
| CN112747848A (en) * | 2018-07-02 | 2021-05-04 | 上海交通大学 | Pressure sensor based on flexible polymer waveguide |
| CN112747848B (en) * | 2018-07-02 | 2021-09-17 | 上海交通大学 | Optical waveguide pressure measurement system based on pressure-sensitive optical waveguide directional coupler |
| CN109541752A (en) * | 2018-11-06 | 2019-03-29 | 重庆邮电大学 | A kind of variable optical attenuator based on all -fiber light control system |
| CN113490840A (en) * | 2019-03-12 | 2021-10-08 | 古河电气工业株式会社 | Pressure sensor |
| WO2020184396A1 (en) * | 2019-03-12 | 2020-09-17 | 古河電気工業株式会社 | Pressure sensor |
| JP2020148525A (en) * | 2019-03-12 | 2020-09-17 | 古河電気工業株式会社 | Pressure sensor |
| JP7016823B2 (en) | 2019-03-12 | 2022-02-07 | 古河電気工業株式会社 | Pressure sensor |
| CN111272105A (en) * | 2020-02-10 | 2020-06-12 | 山西大学 | Micro-nano fiber-based torsion sensor, preparation method and measurement method |
| CN112317285A (en) * | 2020-10-27 | 2021-02-05 | 天津大学 | High-directivity optical fiber photoacoustic transducer and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101261117A (en) | Strain sensor based on porous microstructure optical fiber | |
| Geng et al. | High-sensitivity Mach–Zehnder interferometric temperature fiber sensor based on a waist-enlarged fusion bitaper | |
| Wu et al. | All single-mode fiber Mach–Zehnder interferometer based on two peanut-shape structures | |
| Zhou et al. | Fiber-optic curvature sensor based on cladding-mode Bragg grating excited by fiber multimode interferometer | |
| CN100367016C (en) | Fibre-optical temperature measuring device and measurement thereof | |
| EP3105548A2 (en) | Multicore optical fiber apparatus, methods, and applications | |
| CN100392357C (en) | Lateral stress sensing system based on double-mode photon cystal coptical fibre and implementing method | |
| Zhou et al. | A multi-core fiber based interferometer for high temperature sensing | |
| CN201181206Y (en) | Strain sensor based on porous microstructure optical fiber | |
| CN103063238A (en) | Full-fiber sensor based on Mach-Zehnder interference | |
| Huang et al. | Refractometer based on a tapered Mach–Zehnder interferometer with Peanut-Shape structure | |
| Bao et al. | Fiber-optic vector accelerometer using orthogonal Bragg grating inscription over innermost cladding of a multi-clad fiber | |
| Qi et al. | Highly sensitive bending sensor based on multimode–multimode–coreoffset fiber structure | |
| Niu et al. | Reflective intensity-demodulated refractometer based on S fiber taper | |
| Wang et al. | Seven-core fiber embedded ultra-long period grating for curvature, torsion or temperature sensing | |
| CN108267241B (en) | High-sensitivity optical fiber temperature sensor based on hybrid double peanut knots | |
| Shao et al. | Large measurement-range and low temperature cross-sensitivity optical fiber curvature sensor based on Michelson interferometer | |
| CN102494816B (en) | Pressure sensing method based on photonic crystal fibers and sensor | |
| Lu et al. | A fiber-optic sensor based on no-core fiber and Faraday rotator mirror structure | |
| Xia et al. | Optimization of Mach–Zehnder interferometer with cascaded up-tapers and application for curvature sensing | |
| Hu et al. | Highly sensitive curvature sensor based on long period fiber grating with alternately splicing multiple single/multimode structure | |
| Li et al. | A highly sensitive curvature sensor based on omega-shaped long-period fiber grating | |
| Liu et al. | Micro-open-cavity interferometer for highly sensitive axial-strain measurement via bias-taper and Vernier effect | |
| Wei et al. | High sensitivity compact Mach Zehnder interferometer based on the cascade application of seven-core fiber and graded index multimode fiber | |
| Tao et al. | High-sensitivity detection of magnetic field and temperature based on magnetic fluid coated bi-tapered Mach-Zehnder interferometer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080910 |