CN110470635A - A kind of hydrogen gas sensor based on multicore coupling optical fiber - Google Patents
A kind of hydrogen gas sensor based on multicore coupling optical fiber Download PDFInfo
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- CN110470635A CN110470635A CN201910708131.8A CN201910708131A CN110470635A CN 110470635 A CN110470635 A CN 110470635A CN 201910708131 A CN201910708131 A CN 201910708131A CN 110470635 A CN110470635 A CN 110470635A
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- optical fiber
- hydrogen
- multicore
- gas sensor
- hydrogen gas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/41—Refractivity; Phase-affecting properties, e.g. optical path length
- G01N21/45—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods
- G01N2021/458—Refractivity; Phase-affecting properties, e.g. optical path length using interferometric methods; using Schlieren methods using interferential sensor, e.g. sensor fibre, possibly on optical waveguide
Abstract
The present invention provides a kind of hydrogen gas sensor based on multicore coupling optical fiber, including sensing optical structure and hydrogen sensitive film；Sensing optical structure is made of the first single mode optical fiber, multicore coupling optical fiber and the second single mode optical fiber being successively welded together；The described multicore coupling optical fiber refers to that the core spacing between fibre core is small to enabling to the multi-core optical fiber interfered between adjacent fibre core；Multicore coupling optical fiber is attached on the hydrogen sensitive film.For inventive sensor to needing the simple welding can be prepared, prepared sensor output interference spectrum has the advantages that fringe period is good, demodulation is more efficient, refractive index sensitivity is very high.
Description
Technical field
The invention belongs to sensory field of optic fibre, and in particular to a kind of hydrogen gas sensor based on multicore coupling optical fiber.
Background technique
The sustainable development of resource and environment promotes energy resource structure transition, and development new-energy automobile is that one of China is important
Strategy.Hydrogen energy source is as a kind of important clean energy resource and industrial chemicals, in aerospace, fuel cell, ammonia synthesizing industry etc.
Field oneself through being applied.Since hydrogen has the characteristics such as inflammable and explosive and colorless and odorless, it is difficult to discover after leakage.In recent years
Come, due to the research boom of hydrogen energy source, explosion accident caused by hydrogen leak is commonplace, therefore safety detection density of hydrogen
And it carries out timely early warning and is particularly important in these fields.
Traditional electrochemical sensor uses cable and electric signal as transmission medium, thus still with the danger of potential explosion
Danger；In addition sensing probe operating temperature is excessively high, and sensor is caused to have a possibility that cross sensitivity to other imflammable gas, because
This traditional electrochemical sensor is difficult to meet the needs of safe and reliable monitoring hydrogen concentration in these fields.
Optical Fider Hybrogen Sensor is used as transmission medium using faint optical signal, with safety is good, electromagnetism interference, resistance to
The advantages that corroding and is small in size is the ideal scheme for realizing hydrogen leak safe early warning.
Existing fiber hydrogen method for sensing as sensing element and utilizes variations in refractive index monitoring hydrogen including the use of grating
The method of concentration.This patent is based on refractive index sensing method, belongs to latter class method.
It is one layer of hytrogen sensitive film of plating on grating using grating as the principle of sensing element measurement hydrogen, in hydrogen ring
Hydrogen sensitive film can expand or generate fuel factor under border, so that the central wavelength of grating is drifted about, by analyzing hydrogen
Relationship between concentration and grating wavelength can achieve the purpose that detect hydrogen.
Hydrogen method for sensing based on refractive index modulation principle includes long-period gratings (LPG) hydrogen gas sensor.The sensing
The long-period gratings characteristic sensitive to cladding index is utilized in device, and the spectral peak wavelength by capturing long-period gratings transmission spectrum becomes
Change to map the variation of plated hydrogen sensitization film refractive index on covering.
Summary of the invention
The technical problem to be solved by the present invention is providing a kind of hydrogen gas sensor based on multicore coupling optical fiber.
A kind of technical solution taken by the invention to solve the above technical problem are as follows: hydrogen based on multicore coupling optical fiber
Sensor, it is characterised in that: this sensor includes sensing optical structure and hydrogen sensitive film；Wherein,
Sensing optical structure couples optical fiber and the second single mode optical fiber group by the first single mode optical fiber, the multicore being successively welded together
At；The multicore coupling optical fiber refers to that the core spacing between fibre core is small more to enabling to interfere between adjacent fibre core
Core fibre；
Multicore coupling optical fiber is attached on the hydrogen sensitive film.
According to the above scheme, the hydrogen sensitive film is plated in substrate.
According to the above scheme, the substrate is made of high molecular material.
According to the above scheme, the hydrogen sensitive film is palladium or palldium alloy sensitive membrane.
According to the above scheme, in the described multicore coupling optical fiber, the core spacing between fibre core is 100 nm-10 μm.
According to the above scheme, multicore coupling optical fiber is obtained by one of following three kinds of modes:
1) multicore telecommunication optical fiber draws cone to obtain through high-temperature fusion；
2) prefabricated rods are pre-designed, and then are obtained by preform drawing technique；
3) multiple single mode optical fibers are melted in a glass tube, and then wire drawing obtains.
A kind of density of hydrogen detection system, it is characterised in that: it includes sequentially connected wideband light source, the hydrogen biography
Sensor and spectrometer are constituted；Wherein, hydrogen gas sensor is arranged in environment to be measured；
The optical signal that wideband light source issues is by hydrogen gas sensor, since the multicore coupling lesser core spacing of optical fiber makes adjacent fibre
It is interfered between core, interference spectrum is drawn through the second single mode optical fiber, is detected by spectrometer；When hydrogen causes hydrogen sensitive film
Refractive index change, the obtained interference spectrum of spectrometer changes, pass through tracking interference spectrum variation inverting hydrogen
The variation of gas concentration.
The invention has the benefit that inventive sensor is to needing the simple welding can be prepared, it is prepared
Sensor output interference spectrum is good with fringe period, demodulation is more efficient, refractive index sensitivity is very high excellent
Point.
Detailed description of the invention
Fig. 1 is the system structure diagram of one embodiment of the invention.
Fig. 2 is the sensor structure schematic diagram of one embodiment of the invention.
Fig. 3 is the sensor structure schematic diagram of further embodiment of this invention.
Fig. 4 is the sensor structure schematic diagram of yet another embodiment of the invention.
In figure: 1. wideband light sources, 2. optical fiber, 3. detection devices, 4. hydrogen gas sensors, 5. spectrometers, 4-1. single mode optical fiber,
4-2. multicore couples optical fiber, 4-3. hydrogen sensitive film, 4-4. waist beam, 4-5. fibre core, 4-6. substrate.
Specific embodiment
Below with reference to specific example and attached drawing, the present invention will be further described.
Embodiment one:
The present embodiment provides a kind of hydrogen gas sensors based on multicore coupling optical fiber, including sensing optical structure and hydrogen sensitive
Film.As shown in Fig. 2, sensing optical structure by be successively welded together the first single mode optical fiber 4-1, multicore coupling optical fiber 4-2 and
Second single mode optical fiber composition；The multicore coupling optical fiber 4-2 refers to that the core spacing between fibre core 4-5 is small adjacent to enabling to
The multi-core optical fiber interfered between fibre core 4-5；Multicore coupling optical fiber 4-2 is attached on the hydrogen sensitive film 4-3.Hydrogen
Sensitive membrane 4-3 is plated on substrate 4-6.Multicore couples optical fiber 4-2 and draws cone to obtain through high-temperature fusion by conventional multicore telecommunication optical fiber,
That is, middle part after cone is drawn to form waist beam 4-4.
In the present embodiment, the substrate 4-6 is made of high molecular material, and the hydrogen sensitive film 4-3 is palladium or palladium
Alloy sensitive film, also or doped with palladium multicomponent material-sensitive film.In the multicore coupling optical fiber, the core between fibre core
Spacing is 100 nm-10 μm.
The present embodiment also provides a kind of density of hydrogen detection system, as shown in Figure 1, it includes sequentially connected wideband light source
1, the hydrogen gas sensor 4 and spectrometer 5 are constituted；Wherein, hydrogen gas sensor is arranged in environment to be measured, the present embodiment
Environment to be measured be detection device 3.
The optical signal that wideband light source 1 issues introduces hydrogen gas sensor 4 from optical fiber 2, since multicore couples the lesser core of optical fiber
Spacing to interfere between adjacent fibre core, and interference spectrum is drawn through the second single mode optical fiber, is detected by spectrometer 5；Work as hydrogen
Gas causes the refractive index of hydrogen sensitive film to change, and the obtained interference spectrum of spectrometer 5 changes, and is interfered by tracking
Highly sensitive, high-precision density of hydrogen sensing can be realized in the variation of the variation inverting density of hydrogen of spectrum.
Embodiment two:
The principle and structure of the present embodiment are roughly the same with embodiment one, the difference is that: the multicore couples optical fiber
4-2 is obtained by being pre-designed prefabricated rods, and then by preform drawing technique, as shown in figure 3, sensing optical structure packet
The single mode optical fiber 4-1 at both ends is included, and intermediate multicore couples optical fiber 4-2, the core spacing between fibre core 4-5 is 100 nm-10
μm.Hydrogen sensitive film 4-3 is plated on substrate 4-6, and then multicore coupling optical fiber 4-2 is attached on hydrogen sensitive film 4-3 again.
Embodiment three:
The principle and structure of the present embodiment are roughly the same with embodiment one, the difference is that: the multicore couples optical fiber
4-2 is melted in a glass tube by multiple single mode optical fibers, and then wire drawing obtains, as shown in figure 4, sensing optical structure includes two
The single mode optical fiber 4-1 at end, and intermediate multicore couple optical fiber 4-2.Hydrogen sensitive film 4-3 is plated on substrate 4-6, then again will
Multicore coupling optical fiber 4-2 is attached on hydrogen sensitive film 4-3.
The present invention couples optical fiber-single mode optical fiber structure sensor using single mode optical fiber-multicore, and production is more convenient,
Fringe period is more preferable, demodulates more efficient.
Above embodiments are merely to illustrate design philosophy and feature of the invention, and its object is to make technology in the art
Personnel can understand the content of the present invention and implement it accordingly, and protection scope of the present invention is not limited to the above embodiments.So it is all according to
It is within the scope of the present invention according to equivalent variations made by disclosed principle, mentality of designing or modification.
Claims (7)
1. it is a kind of based on multicore coupling optical fiber hydrogen gas sensor, it is characterised in that: this sensor include sensing optical structure and
Hydrogen sensitive film；Wherein,
Sensing optical structure couples optical fiber and the second single mode optical fiber group by the first single mode optical fiber, the multicore being successively welded together
At；The multicore coupling optical fiber refers to that the core spacing between fibre core is small more to enabling to interfere between adjacent fibre core
Core fibre；
Multicore coupling optical fiber is attached on the hydrogen sensitive film.
2. hydrogen gas sensor according to claim 1, it is characterised in that: the hydrogen sensitive film is plated in substrate.
3. hydrogen gas sensor according to claim 2, it is characterised in that: the substrate is made of high molecular material.
4. hydrogen gas sensor according to claim 2 or 3, it is characterised in that: the hydrogen sensitive film is that palladium or palladium close
Golden sensitive membrane.
5. hydrogen gas sensor according to claim 1, it is characterised in that: in the multicore coupling optical fiber, between fibre core
Core spacing be 100 nm-10 μm.
6. hydrogen gas sensor according to claim 5, it is characterised in that: the multicore coupling optical fiber passes through following three kinds
One of mode obtains:
1) multicore telecommunication optical fiber draws cone to obtain through high-temperature fusion；
2) prefabricated rods are pre-designed, and then are obtained by preform drawing technique；
3) multiple single mode optical fibers are melted in a glass tube, and then wire drawing obtains.
7. a kind of density of hydrogen detection system, it is characterised in that: it includes sequentially connected wideband light source, in claim 1 to 6
Hydrogen gas sensor described in any one and spectrometer are constituted；Wherein, hydrogen gas sensor is arranged in environment to be measured；
The optical signal that wideband light source issues is by hydrogen gas sensor, since the multicore coupling lesser core spacing of optical fiber makes adjacent fibre
It is interfered between core, interference spectrum is drawn through the second single mode optical fiber, is detected by spectrometer；When hydrogen causes hydrogen sensitive film
Refractive index change, the obtained interference spectrum of spectrometer changes, pass through tracking interference spectrum variation inverting hydrogen
The variation of gas concentration.
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| CN201910708131.8A CN110470635A (en) | 2019-08-01 | 2019-08-01 | A kind of hydrogen gas sensor based on multicore coupling optical fiber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954507A (en) * | 2019-12-24 | 2020-04-03 | 中国计量大学 | Hydrogen sensor based on seven-core optical fiber |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011034584A2 (en) * | 2009-09-18 | 2011-03-24 | Luna Innovations Incorporated | Optical position and/or shape sensing |
| CN102495045A (en) * | 2011-11-07 | 2012-06-13 | 华中科技大学 | Hydrogen sensitive material for optical fiber hydrogen sensor and preparation method of hydrogen sensitive material |
| CN103196869A (en) * | 2013-03-05 | 2013-07-10 | 华中科技大学 | Measurement method of effective refractive index difference of multicore optical fibers and spectral data acquisition apparatus thereof |
| CN103439765A (en) * | 2013-06-26 | 2013-12-11 | 江苏金迪电子科技有限公司 | All-optical-fiber type multi-path interferometer |
| CN203630041U (en) * | 2013-12-27 | 2014-06-04 | 平湖波汇通信科技有限公司 | Micro optical fiber hydrogen sensor |
| CN105841840A (en) * | 2016-03-30 | 2016-08-10 | 东北大学 | Optical fiber sensor capable of simultaneously measuring hydrogen concentration and temperature |
| CN107015310A (en) * | 2017-05-11 | 2017-08-04 | 武汉市艾玻睿光电科技有限公司 | A kind of Multi-channel interferometer based on multi-core fiber core shift welding and preparation method thereof |
| CN207540971U (en) * | 2017-11-24 | 2018-06-26 | 中国计量大学 | A kind of Optical Fider Hybrogen Sensor based on single mode-torsion multi-mode-single mode structure |
-
2019
- 2019-08-01 CN CN201910708131.8A patent/CN110470635A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011034584A2 (en) * | 2009-09-18 | 2011-03-24 | Luna Innovations Incorporated | Optical position and/or shape sensing |
| CN102495045A (en) * | 2011-11-07 | 2012-06-13 | 华中科技大学 | Hydrogen sensitive material for optical fiber hydrogen sensor and preparation method of hydrogen sensitive material |
| CN103196869A (en) * | 2013-03-05 | 2013-07-10 | 华中科技大学 | Measurement method of effective refractive index difference of multicore optical fibers and spectral data acquisition apparatus thereof |
| CN103439765A (en) * | 2013-06-26 | 2013-12-11 | 江苏金迪电子科技有限公司 | All-optical-fiber type multi-path interferometer |
| CN203630041U (en) * | 2013-12-27 | 2014-06-04 | 平湖波汇通信科技有限公司 | Micro optical fiber hydrogen sensor |
| CN105841840A (en) * | 2016-03-30 | 2016-08-10 | 东北大学 | Optical fiber sensor capable of simultaneously measuring hydrogen concentration and temperature |
| CN107015310A (en) * | 2017-05-11 | 2017-08-04 | 武汉市艾玻睿光电科技有限公司 | A kind of Multi-channel interferometer based on multi-core fiber core shift welding and preparation method thereof |
| CN207540971U (en) * | 2017-11-24 | 2018-06-26 | 中国计量大学 | A kind of Optical Fider Hybrogen Sensor based on single mode-torsion multi-mode-single mode structure |
Non-Patent Citations (9)
| Title |
|---|
| 《武汉理工大学学报》: ""七芯光纤拉锥的折射率传感性能研究"", 《武汉理工大学学报》 * |
| CHUANBIAO ZHANG等: ""Refractive index sensor based on tapered multicore fiber"", 《OPTICAL FIBER TECHNOLOGY》 * |
| YUEFENG QI等: ""A Novel High Sensitivity Refractive Index Sensor Based on Multi-Core Micro/Nano Fiber"", 《PHOTONIC SENSORS》 * |
| ZHENGYONG LI等: ""Ultrasensitive refractive index sensor based on a Mach–Zehnder interferometer created in twin-core fiber"", 《OPTICS LETTERS》 * |
| 代吉祥等: ""基于WO3-Pd复合膜的D型光纤光栅氢气传感器"", 《光子学报》 * |
| 杨明红等: ""面向应用的光纤氢气传感技术"", 《应用科学学报》 * |
| 王冠军著: "《新型微结构光纤传感技术》", 31 August 2015 * |
| 胡义慧等: ""基于多芯光纤错位熔接结构的温度与折射率同时测量传感器"", 《光电子·激光》 * |
| 董航宇: ""多芯光纤构成的光线折射率传感器"", 《激光杂志》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954507A (en) * | 2019-12-24 | 2020-04-03 | 中国计量大学 | Hydrogen sensor based on seven-core optical fiber |
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