CN114414485A - Hydrogen detector based on elastic optical fiber - Google Patents
Hydrogen detector based on elastic optical fiber Download PDFInfo
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- CN114414485A CN114414485A CN202210061195.5A CN202210061195A CN114414485A CN 114414485 A CN114414485 A CN 114414485A CN 202210061195 A CN202210061195 A CN 202210061195A CN 114414485 A CN114414485 A CN 114414485A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 199
- 239000001257 hydrogen Substances 0.000 title claims abstract description 59
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 59
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 51
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 158
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 79
- 239000012528 membrane Substances 0.000 claims abstract description 42
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 210000004177 elastic tissue Anatomy 0.000 claims description 34
- 150000002431 hydrogen Chemical class 0.000 claims description 12
- 239000013308 plastic optical fiber Substances 0.000 claims description 6
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 6
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 23
- 230000003287 optical effect Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 30
- 230000008878 coupling Effects 0.000 description 13
- 238000010168 coupling process Methods 0.000 description 13
- 238000005859 coupling reaction Methods 0.000 description 13
- 230000008859 change Effects 0.000 description 8
- 230000035945 sensitivity Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 206010003497 Asphyxia Diseases 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- 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
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/08—Optical fibres; light guides
- G01N2201/088—Using a sensor fibre
Abstract
The invention relates to the technical field of hydrogen detection, in particular to a hydrogen detector based on an elastic optical fiber, which comprises a light source, an optical detector, a substrate, an elastic layer, a first elastic optical fiber, a second elastic optical fiber and a palladium film, wherein the elastic layer is arranged on the substrate, the first elastic optical fiber and the second elastic optical fiber are arranged on the elastic layer, a gap is arranged between the end surfaces of the first elastic optical fiber and the second elastic optical fiber, the palladium film is arranged on the upper end surfaces of the first elastic optical fiber and the second elastic optical fiber, the other end of the first elastic optical fiber is connected with the light source, and the other end of the second elastic optical fiber is connected with the optical detector. When the device is applied, the palladium membrane adsorbs hydrogen to be detected to expand, so that the width of a gap is changed, and the transmission characteristic from the first elastic optical fiber to the second elastic optical fiber is changed; hydrogen detection is achieved by detecting changes in the propagation characteristics. The invention only needs to cut the optical fiber, has low requirement on the precision of the thickness of the palladium film, is convenient to popularize and apply, and has good application prospect in the field of hydrogen detection.
Description
Technical Field
The invention relates to the technical field of hydrogen detection, in particular to a hydrogen detector based on an elastic optical fiber.
Background
Hydrogen is a colorless and less dense gas than air, and the same volume is much lighter than air. Hydrogen is the major industrial raw material and is also the most important industrial and specialty gas. In addition, hydrogen is also used as a fuel due to its advantages of abundant resources, high calorific value, cleanliness, and the like.
The hydrogen has a small molecular weight and is easy to leak. When the volume fraction in the air is 4% -75%, an explosion can be caused when encountering a fire source. Although hydrogen is nontoxic and physiologically inert to the human body, if the content of hydrogen in the air is increased, anoxic asphyxia is caused. With the wider application of hydrogen, the method has important significance for high-sensitivity detection of low-concentration hydrogen.
The optical fiber hydrogen detector based on the waveguide structure has the advantages of high integration level, small device size and the like. For example, the manufacturing method of the fiber hydrogen detector based on the evanescent field is as follows: removing the outer cladding of the optical fiber by using the Xian, and then arranging a palladium film on the surface of the treated optical fiber; energy in the optical fiber leaks into the palladium film, and after the palladium film absorbs hydrogen, the refractive index of the palladium film changes, so that light transmitted in the optical fiber is changed, and hydrogen detection is realized. Although the optical fiber hydrogen detector based on the waveguide structure realizes higher hydrogen detection sensitivity, the optical fiber needs to be thinned, the thickness of the palladium film is controlled with higher requirement, and the requirement on the preparation process is high.
Disclosure of Invention
In order to solve the problems, the invention provides an elastic fiber-based hydrogen detector which comprises a light source, a light detector, a substrate, an elastic layer, a first elastic fiber, a second elastic fiber and a palladium film, wherein the elastic layer is arranged on the substrate, the first elastic fiber and the second elastic fiber are arranged on the elastic layer, a gap is arranged between the end faces of the first elastic fiber and the second elastic fiber, the palladium film is arranged on the upper end faces of the first elastic fiber and the second elastic fiber, the other end of the first elastic fiber is connected with the light source, and the other end of the second elastic fiber is connected with the light detector. When the optical fiber is applied, the palladium membrane is in an environment to be detected, and after the palladium membrane adsorbs hydrogen in the environment to be detected, the palladium membrane expands to drive the first elastic optical fiber and the second elastic optical fiber to extend, so that the width of a gap is changed, the coupling characteristic between the first elastic optical fiber and the second elastic optical fiber is changed, or the propagation characteristic between the first elastic optical fiber and the second elastic optical fiber is changed; the hydrogen detection is achieved by detecting a change in the coupling or propagation characteristics with a light detector.
Further, the first elastic optical fiber and the second elastic optical fiber are plastic optical fibers. The plastic optical fiber has better elasticity, so that the distance between the first elastic optical fiber and the second elastic optical fiber is changed more when the palladium film expands.
Further, the material of the elastic layer is PMMA.
Still further, the elastic layer has a thickness greater than 100 microns.
Still further, the palladium membrane has a thickness of less than 10 microns.
Further, the width of the gap is less than 1 micron, and further, the width of the gap is less than 100 nanometers, so that when the first elastic fiber and the second elastic fiber are elongated, the relative change of the gap width is more, and the coupling characteristic or the propagation characteristic of the gap is more changed.
Further, the end faces of the first elastic optical fiber and the second elastic optical fiber are tapered. The tapered end face reduces the relative area of the first elastic optical fiber and the second elastic optical fiber, and the coupling characteristic or propagation characteristic of the first elastic optical fiber to the second elastic optical fiber depends more heavily on the distance therebetween, so as to achieve higher sensitivity of hydrogen gas detection.
Furthermore, at the gap, the surface of the elastic layer is provided with a concave pit, and the end parts of the first elastic optical fiber and the second elastic optical fiber are in a suspended state. When the ends of the first elastic optical fiber and the second elastic optical fiber are suspended, the first elastic optical fiber and the second elastic optical fiber are not in contact with the elastic layer, so that the adhesion force or acting force of the first elastic optical fiber and the second elastic optical fiber with the elastic layer is reduced, when the palladium membrane expands, the first elastic optical fiber and the second elastic optical fiber expand more, the width of the gap is changed more, and hydrogen detection with higher sensitivity is realized.
Further, a palladium membrane connects the ends of the first elastic optical fiber and the second elastic optical fiber. That is, the palladium film is provided both on the end portions of the first elastic optical fiber and the second elastic optical fiber and on the upper side of the gap. Thus, when the palladium membrane expands, the width of the gap is increased, the propagation characteristic of the gap is also changed, and hydrogen gas detection can be realized by the change of the propagation characteristic. The application of the palladium membrane to connect the first elastic optical fiber and the second elastic optical fiber can change the width of the gap more, thereby realizing hydrogen detection with higher sensitivity.
Further, on the first elastic optical fiber and the second elastic optical fiber, a palladium film is thin; on the upper side of the gap, the palladium film is thick. Therefore, the method not only ensures that the gaps generate more width changes when the palladium membrane adsorbs hydrogen, but also ensures the firmness of the palladium membrane in connection with the first elastic optical fiber and the second elastic optical fiber.
The invention has the beneficial effects that: the invention provides a hydrogen detector based on elastic optical fibers, which comprises a light source, a light detector, a substrate, an elastic layer, a first elastic optical fiber, a second elastic optical fiber and a palladium film, wherein the elastic layer is arranged on the substrate, the first elastic optical fiber and the second elastic optical fiber are arranged on the elastic layer, a gap is arranged between the end surfaces of the first elastic optical fiber and the second elastic optical fiber, the palladium film is arranged on the upper end surfaces of the first elastic optical fiber and the second elastic optical fiber, the other end of the first elastic optical fiber is connected with the light source, and the other end of the second elastic optical fiber is connected with the light detector. When the optical fiber is applied, the palladium membrane is in an environment to be detected, and after the palladium membrane adsorbs hydrogen in the environment to be detected, the palladium membrane expands to drive the first elastic optical fiber and the second elastic optical fiber to extend, so that the width of a gap is changed, the coupling characteristic between the first elastic optical fiber and the second elastic optical fiber is changed, or the propagation characteristic between the first elastic optical fiber and the second elastic optical fiber is changed; the hydrogen detection is achieved by detecting a change in the coupling or propagation characteristics with a light detector. The method only needs to cut the optical fiber, does not need to thin the optical fiber, has low requirement on the thickness precision of the palladium film, is convenient to popularize and apply, and has good application prospect in the field of hydrogen detection.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of an elastic fiber-based hydrogen detector.
FIG. 2 is a schematic diagram of yet another hydrogen detector based on elastic fiber.
Fig. 3 is a schematic diagram of yet another hydrogen detector based on elastic fiber.
Fig. 4 is a schematic diagram of yet another hydrogen detector based on elastic fiber.
In the figure: 1. a substrate; 2. an elastic layer; 3. a first elastic optical fiber; 4. a second elastic optical fiber; 5. a gap; 6. a palladium membrane.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below by referring to the accompanying drawings and examples.
Example 1
The invention provides a hydrogen detector based on an elastic optical fiber. The hydrogen detector based on the elastic optical fiber comprises a light source, an optical detector, a substrate 1, an elastic layer 2, a first elastic optical fiber 3, a second elastic optical fiber 4 and a palladium film 6. As shown in fig. 1, an elastic layer 2 is disposed on a substrate 1. The material of the substrate 1 is not limited. The substrate 1 may be used for mounting purposes, and the material of the substrate 1 is suitably selected to facilitate mounting of the device on a component. The material of the elastic layer 2 is PMMA, and the thickness of the elastic layer 2 is greater than 100 micrometers, so that the elastic layer 2 has high elasticity. A first elastic optical fiber 3 and a second elastic optical fiber 4 are disposed on the elastic layer 2. The first elastic optical fiber 3 and the second elastic optical fiber 4 are plastic optical fibers. The plastic optical fiber is an optical fiber which uses high-transparency polymers such as polystyrene, polymethyl methacrylate (PMMA) and polycarbonate as core layer materials and PMMA, fluoroplastic and the like as skin layer materials. Compared with the common optical fiber, the plastic optical fiber has better elasticity, so that the distance between the first elastic optical fiber 3 and the second elastic optical fiber 4 is changed more when the palladium membrane 6 expands. The first elastic optical fiber 3 and the second elastic optical fiber 4 are arranged on the same straight line, and a gap 5 is arranged between the end faces of the first elastic optical fiber 3 and the second elastic optical fiber 4. The width of the gap 5 is less than 1 micrometer and further the width of the gap 5 is less than 100 nanometers, so that when the first elastic optical fiber 3 and the second elastic optical fiber 4 are elongated, the relative change of the width of the gap 5 is more, and the coupling characteristic or the propagation characteristic of the gap 5 is more changed. The upper end faces of the first elastic optical fiber 3 and the second elastic optical fiber 4 are provided with palladium films 6. The thickness of palladium membrane 6 is less than 10 μm so that palladium membrane 6 itself is less resistant to the expansion of palladium membrane 6 itself when palladium membrane 6 adsorbs hydrogen to cause the expansion. The other end of the first elastic optical fiber 3 is connected with a light source, and the other end of the second elastic optical fiber 4 is connected with a light detector. In practical applications, the other ends of the first elastic fiber 3 and the second elastic fiber 4 are both longer than the elastic layer 2, that is, the elastic layer 2 extends out, so that the connection with a light source or a light detector is facilitated. The light detector may optionally include a spectrometer to facilitate measurement of transmission characteristics of light of different wavelengths.
When the optical fiber connector is applied, the palladium membrane 6 is in an environment to be detected, and the palladium membrane 6 expands after absorbing hydrogen in the environment to be detected, so that the first elastic optical fiber 3 and the second elastic optical fiber 4 are driven to extend, the width of the gap 5 is changed, the coupling characteristic between the first elastic optical fiber 3 and the second elastic optical fiber 4 is changed, or the propagation characteristic between the first elastic optical fiber 3 and the second elastic optical fiber 4 is changed; the hydrogen detection is achieved by detecting a change in the coupling or propagation characteristics with a light detector. The method only needs to cut the optical fiber without thinning the optical fiber, has low requirement on the precision of the thickness of the palladium membrane 6, is convenient to popularize and apply, and has good application prospect in the field of hydrogen detection.
In the present invention, the palladium membrane 6 may also be provided on the elastic layer 2, that is, the palladium membrane 6 is not only provided in the vicinity of the end faces on the first elastic optical fiber 3 and the second elastic optical fiber 4, but the palladium membrane 6 may also extend from the first elastic optical fiber 3 and the second elastic optical fiber 4 onto the elastic layer 2. Since the elastic layer 2 has elasticity, it does not affect the performance of the present invention much, but it results in a simple and easy preparation process of the present invention. That is, the palladium film 6 is not required to be prepared on the first elastic optical fiber 3 and the second elastic optical fiber 4 strictly.
Example 2
In example 1, the end faces of the first elastic optical fiber 3 and the second elastic optical fiber 4 are tapered. That is, the first elastic optical fiber 3 and the second elastic optical fiber 4 are tapered in the first elastic optical fiber 3 to gap 5 direction and in the second elastic optical fiber 4 to gap 5 direction. The tapered end face reduces the relative area of the first elastic optical fiber 3 and the second elastic optical fiber 4, and the coupling characteristic between the first elastic optical fiber 3 and the second elastic optical fiber 4 changes more when the distance between the first elastic optical fiber 3 and the second elastic optical fiber 4 changes. That is, the coupling characteristic or the propagation characteristic of the first elastic optical fiber 3 to the second elastic optical fiber 4 is more heavily dependent on the distance therebetween in order to achieve higher sensitivity of hydrogen gas detection.
Example 3
In example 2, a concave is formed in the surface of the elastic layer 2 in the gap 5, and the ends of the first elastic optical fiber 3 and the second elastic optical fiber 4 are suspended. When the ends of the first elastic optical fiber 3 and the second elastic optical fiber 4 are suspended, the ends of the first elastic optical fiber 3 and the second elastic optical fiber 4 are no longer in contact with the elastic layer 2, and the adhesion or acting force of the first elastic optical fiber 3 and the second elastic optical fiber 4 to the elastic layer 2 is reduced, so that when the palladium membrane 6 expands, the first elastic optical fiber 3 and the second elastic optical fiber 4 expand more, and the width of the gap 5 is changed more, thereby realizing hydrogen detection with higher sensitivity. Further, the width of the pit is larger than the width of the palladium film 6 on the first elastic optical fiber 3 and the second elastic optical fiber 4, so that when the palladium film 6 expands, the elastic layer 2 has no resistance to the first elastic optical fiber 3 and the second elastic optical fiber 4, the first elastic optical fiber 3 and the second elastic optical fiber 4 generate more elongation, and the width of the gap 5 and the coupling characteristics are changed more, thereby realizing more sensitive hydrogen detection.
Example 4
On the basis of example 3, a palladium membrane 6 connects the ends of the first elastic optical fiber 3 and the second elastic optical fiber 4. That is, the palladium membrane 6 is provided both on the end portions of the first elastic optical fiber 3 and the second elastic optical fiber 4 and on the upper side of the gap 5. Thus, when the palladium membrane 6 expands, the width of the gap 5 is increased due to the pressing action of the palladium membrane 6, the propagation characteristic of the gap 5 is also changed, and hydrogen gas detection can be realized also by the change in the propagation characteristic. The use of the palladium membrane 6 to connect the first elastic optical fiber 3 and the second elastic optical fiber 4 enables more variation in the width of the gap 5, thereby achieving more sensitive hydrogen detection. Further, the palladium film 5 covers the end portion of the first elastic optical fiber 3, the second optical fiber end portion 4, and the gap 5. Since the palladium film 6 is arranged on the elastic layer 2, the performance of the device is not greatly influenced, so that the palladium film 6 covering the end part of the first elastic optical fiber 3, the end part of the second elastic optical fiber 4 and the gap 5 is arranged above the elastic layer 2, the gap 5 area is sealed, impurities and the like in the space to be detected cannot influence the space in which the gap 5 is positioned, the influence on the coupling characteristic between the first elastic optical fiber 3 and the second elastic optical fiber 4 is small, and the accuracy of the detection result is ensured.
Example 5
On the basis of example 4, on the first elastic optical fiber 3 and the second elastic optical fiber 4, the palladium film 6 is thin; on the upper side of the gap 5, the palladium membrane 6 is thick. Since the palladium membrane 6 above the gap 5 is thick, the gap 5 generates more width variation when hydrogen is adsorbed on the upper and lower surfaces of the palladium membrane 6; the palladium membrane 6 above the gap 5 is thick, which ensures the firmness of the palladium membrane 6 connecting the first elastic optical fiber 3 and the second elastic optical fiber 4. The palladium film 6 on the first elastic optical fiber 3 and the second elastic optical fiber 4 is thin, and the weight of the palladium film 6 itself is reduced so as not to cause the first elastic optical fiber 3 and the second elastic optical fiber 4 to bend above the pits due to the palladium film 6.
Example 6
On the basis of examples 1 to 6, the palladium membrane 6 on the side of the first elastic optical fiber 3 and the palladium membrane 6 on the side of the second elastic optical fiber 4 are disposed asymmetrically with respect to the first elastic optical fiber 3 and the second elastic optical fiber 4, respectively. For example, on the first elastic fiber 3 side, the palladium film 6 on the left side is wider and the palladium film 6 on the right side is narrower along the direction of connecting the first elastic fiber 3 and the second elastic fiber 4; on the second elastic fiber 4 side, the palladium film 6 on the right side is wide and the palladium film 6 on the left side is narrow in the direction of connecting the first elastic fiber 3 and the second elastic fiber 4. Therefore, when the palladium membrane 6 adsorbs hydrogen to expand, the first elastic optical fiber 3 and the second elastic optical fiber 4 are dislocated, and the light propagation characteristics from the first elastic optical fiber 3 to the second elastic optical fiber 4 are changed more, so that hydrogen detection with higher sensitivity is realized.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (10)
1. The hydrogen detector based on the elastic optical fiber is characterized by comprising a light source, a light detector, a substrate, an elastic layer, a first elastic optical fiber, a second elastic optical fiber and a palladium film, wherein the elastic layer is arranged on the substrate, the first elastic optical fiber and the second elastic optical fiber are arranged on the elastic layer, a gap is formed between the end faces of the first elastic optical fiber and the second elastic optical fiber, the palladium film is arranged on the upper end faces of the first elastic optical fiber and the second elastic optical fiber, the other end of the first elastic optical fiber is connected with the light source, and the other end of the second elastic optical fiber is connected with the light detector.
2. The elastic fiber based hydrogen sensor according to claim 1, wherein: the first elastic optical fiber and the second elastic optical fiber are plastic optical fibers.
3. The elastic fiber based hydrogen sensor according to claim 1, wherein: the elastic layer is made of PMMA.
4. The elastic fiber based hydrogen sensor according to claim 1, wherein: the elastic layer has a thickness greater than 100 microns.
5. The elastic fiber based hydrogen sensor according to claim 1, wherein: the palladium membrane has a thickness of less than 10 microns.
6. The elastic fiber based hydrogen sensor according to claim 1, wherein: the width of the gap is less than 1 micron.
7. The elastic fiber based hydrogen sensor according to claim 1, wherein: the end faces of the first elastic optical fiber and the second elastic optical fiber are tapered.
8. The elastic fiber based hydrogen sensor according to claim 1, wherein: and a concave pit is arranged on the surface of the elastic layer at the gap, and the end parts of the first elastic optical fiber and the second elastic optical fiber are in a suspended state.
9. An elastic fiber based hydrogen sensor according to any of claims 1 to 8, wherein: the palladium membrane connects ends of the first elastic optical fiber and the second elastic optical fiber.
10. The elastic fiber based hydrogen sensor according to claim 9, wherein: the palladium film is thin on the first elastic optical fiber and the second elastic optical fiber; on the upper side of the gap, the palladium film is thick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210061195.5A CN114414485B (en) | 2022-01-19 | 2022-01-19 | Hydrogen detector based on elastic optical fiber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210061195.5A CN114414485B (en) | 2022-01-19 | 2022-01-19 | Hydrogen detector based on elastic optical fiber |
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| CN114414485B CN114414485B (en) | 2023-12-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090129721A1 (en) * | 2006-12-09 | 2009-05-21 | University Of Pittsburgh-Of The Commonwealth System Of Higher Education | Fiber optic gas sensor |
| CN101451959A (en) * | 2008-12-30 | 2009-06-10 | 清华大学 | Hydrogen sensor and pd film hydrogen sensing system |
| WO2011081245A1 (en) * | 2009-12-29 | 2011-07-07 | 연세대학교 산학협력단 | Hydrogen sensor, and method for fabricating same |
| CN104406885A (en) * | 2014-12-11 | 2015-03-11 | 广东电网有限责任公司电力科学研究院 | Dissolved hydrogen limited value sensor in power transformer oil and detection system |
| CN104792715A (en) * | 2015-05-04 | 2015-07-22 | 华北电力大学 | Fiber bragg grating hydrogen sensor used for detecting hydrogen in transformer oil |
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| CN112362903A (en) * | 2020-11-03 | 2021-02-12 | 金华伏安光电科技有限公司 | Flow velocity detection device based on optical fiber coupling |
| CN112393820A (en) * | 2021-01-18 | 2021-02-23 | 浙江大学 | Intrinsically safe and explosion-proof hydrogen concentration and temperature detection system and detection method |
| CN113155906A (en) * | 2021-03-05 | 2021-07-23 | 中山大学 | Hydrogen sensor, preparation method thereof and hydrogen detection method |
| CN113375768A (en) * | 2021-06-10 | 2021-09-10 | 山东第一医科大学(山东省医学科学院) | High-sensitivity optical fiber quality detection sensor |
-
2022
- 2022-01-19 CN CN202210061195.5A patent/CN114414485B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090129721A1 (en) * | 2006-12-09 | 2009-05-21 | University Of Pittsburgh-Of The Commonwealth System Of Higher Education | Fiber optic gas sensor |
| CN101451959A (en) * | 2008-12-30 | 2009-06-10 | 清华大学 | Hydrogen sensor and pd film hydrogen sensing system |
| WO2011081245A1 (en) * | 2009-12-29 | 2011-07-07 | 연세대학교 산학협력단 | Hydrogen sensor, and method for fabricating same |
| CN104406885A (en) * | 2014-12-11 | 2015-03-11 | 广东电网有限责任公司电力科学研究院 | Dissolved hydrogen limited value sensor in power transformer oil and detection system |
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| CN112362903A (en) * | 2020-11-03 | 2021-02-12 | 金华伏安光电科技有限公司 | Flow velocity detection device based on optical fiber coupling |
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| CN114414485B (en) | 2023-12-05 |
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