CN206573479U - A kind of hydrogen gas sensor based on fiber coupler - Google Patents
A kind of hydrogen gas sensor based on fiber coupler Download PDFInfo
- Publication number
- CN206573479U CN206573479U CN201720266576.1U CN201720266576U CN206573479U CN 206573479 U CN206573479 U CN 206573479U CN 201720266576 U CN201720266576 U CN 201720266576U CN 206573479 U CN206573479 U CN 206573479U
- Authority
- CN
- China
- Prior art keywords
- fiber coupler
- gas sensor
- hydrogen gas
- hydrogen
- spectrometer
- 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 hydrogen gas sensor based on fiber coupler, including wideband light source, spectrometer and fiber coupler, it is characterised in that：Described fiber coupler is to be closely packed together fused biconical taper by two identical single-mode fibers for removing coat, and be 10 50 microns of Pd/Ag catalyst alloy powder in the side applied thickness of its coupling regime, one end of the wherein input of fiber coupler is connected with wideband light source, and one end of output end is connected with spectrometer.The utility model has compact conformation, small volume, easily made and low cost and other advantages, can be applied to the measurement of density of hydrogen.
Description
Technical field
The utility model belongs to technical field of optical fiber sensing, and in particular to a kind of hydrogen sensing based on fiber coupler
Device.
Background technology
Hydrogen fuel is a kind of free of contamination novel energy, but it has the inflammability and explosion hazard of height.Therefore hydrogen fuel
Storage, use and transport during there may be danger.The leakage of hydrogen can be forecast to protection human life's wealth in advance
Seem particularly important in production safety.For a long time, people always search for the high good, sensitivity of selectivity, fast response time, energy consumption
Low, stability is good, manufacture craft is simple and cheap hydrogen gas sensor easy of integrationization.According to the difference of operation principle, hydrogen is passed
Sensor mainly has the several types such as electrochemistry type, semi-conductor type, electrothermic type and optical-fiber type.It is traditional based on electrology characteristic come work
Hydrogen gas sensor when in use there may be electric spark, there is the danger that ignition and blasting leaks hydrogen, and this kind of sensor
Have the shortcomings that the selectivity for hydrogen is not strong.Compared with traditional hydrogen gas sensor, Optical Fider Hybrogen Sensor is believed by light
Number detected there is that essential safety, small volume, lightweight, corrosion-resistant, electromagnetism interference, sensitivity are high.Based on table
The hydrogen gas sensor of surface plasma resonance technology, sensitivity is very high, and its key is thickness (the nanometer amount of accurate control metal film
Level), but need to use the instrument and equipment of costliness.Hydrogen gas sensor based on Fiber Bragg Grating FBG, because there is wavelength-division to answer for it
Characteristic and the distribution measuring for being widely used in density of hydrogen, but sensitivity is generally relatively low.Although rubbing down grating technology can be with
Sensitivity for strengthening hydrogen, but it reduces the mechanical strength of sensor, and becoming for allowing is fragile easily broken.Based on integrated optics
The hydrogen gas sensor of micro-structural, with compact dimensioning and high sensitivity, but their manufacture is related to complex mistake
Journey, so as to also limit its extensive use.
The content of the invention
In order to solve above-mentioned the deficiencies in the prior art, the utility model provides a kind of hydrogen sensing based on fiber coupler
Device, two identical single-mode fibers for removing coat is drawn close to be placed in heat under high temperature in some way melting, and together
When to optical fiber two ends stretch and be made, then coupling regime side apply Pd/Ag catalyst alloy powder, with preparation
Convenient, simple in construction and low cost and other advantages.
The technical scheme that the utility model is used：A kind of hydrogen gas sensor based on fiber coupler, including broadband light
Source, spectrometer and fiber coupler, it is characterised in that：Described fiber coupler is by two identical lists for removing coat
Mode fiber, which is close together, to be heated fused biconical taper and is made, and is 10-50 microns in the side applied thickness of its coupling regime
Pd/Ag catalyst alloy powder, one end of the wherein input of fiber coupler is connected with wideband light source, one end of output end
It is connected with spectrometer.
The beneficial effects of the utility model are：
1. heating that only two identical single-mode fibers for removing coat need to be close together in sensor preparation process is molten
Melt drawing cone, then apply Pd/Ag catalyst alloy powder in the side of coupling regime, with easy preparation, simple in construction and cost
Low advantage.
2. the coupler visibility of the sensor is only relevant with the coefficient of coup of fiber coupler, thus from wideband light source
Instable influence, it has more stability compared with general sensor.
3. described in the operation principle of hydrogen gas sensor be：Hydrogen on the interface of Pd/Ag catalyst alloy powder by from
Solve and absorbed for hydrogen atom, finally produce chemisorbed, hydrogen atom spreads in palladium crystal, and it is as follows to produce chemical reaction：
H2+Pd→PdHx (1)
PdH can be generated in the course of reactionx, thus the optical property such as the refractive index of Pd/Ag catalyst alloy powder can be with
Absorb the difference of density of hydrogen and change, Pd/Ag catalyst is applied compared with uncoated Pd/Ag catalyst alloy powder and is closed
The refractive index of the fiber coupler at bronze end is high, and its coefficient of coup is consequently increased, the transmission spectrum meeting detected by spectrometer
Shifted with the increase of refractive index to the shorter direction of wavelength, by detecting that the drift value of transmission spectrum can accurately determine to treat
Survey the concentration of Hydrogen in Air.
Brief description of the drawings
Fig. 1 is the hydrogen gas sensor configuration schematic diagram based on fiber coupler.Wherein, (1) single-mode fiber, (2) Pd/Ag is urged
Agent alloy powder.
Fig. 2 is the application implementation schematic diagram of the hydrogen gas sensor based on fiber coupler.Wherein, (3) wideband light source, (4)
Air chamber, (5) spectrometer, (6) fiber coupler hydrogen gas sensor.
Fig. 3 is the sensing characteristicses test result signal of the hydrogen gas sensor configuration of a fiber coupler based on the present invention
Figure.
Embodiment
By two connection ends of the fiber coupler hydrogen gas sensor of the present invention calibrated respectively with wideband light source and spectrum
Instrument is connected, as shown in Figure 2.The fiber coupler of side coating Pd/Ag alloy powders is placed in the space of density of hydrogen to be measured.Light
Spectrometer records the resonance wave long value in the transmission spectrum of fiber coupler hydrogen gas sensor, especially transmission spectrum in real time.By comparing
The variable quantity of resonance wavelength is so that it is determined that the concentration of space hydrogen to be measured.Fig. 3 gives a biography based on the sensor construction
Feel characteristic test result schematic diagram.From the transmission spectrum of sensor when applying Pd/Ag alloy powders with uncoated Pd/Ag alloy powders
As can be seen that PdH can be generated after inhaling hydrogen due to Pd/Ag alloy powdersx, the refractive index of the sensor of the coating powder can be high,
Its coefficient of coup is consequently increased, and the transmission spectrum detected by spectrometer can be sent out with the increase of refractive index to the shorter direction of wavelength
Raw skew, by detecting that the drift value of transmission spectrum can accurately determine the concentration of Hydrogen in Air to be measured.
Claims (2)
1. a kind of hydrogen gas sensor based on fiber coupler, including wideband light source, spectrometer and fiber coupler, its feature exist
In：Described fiber coupler is formed by two identical single-mode fibers fused biconical tapers that are close together for removing coats
, and the side of the coupling regime in fiber coupler applies Pd/Ag catalyst alloy powder, the wherein input of fiber coupler
The one end at end is connected with wideband light source, and one end of output end is connected with spectrometer.
2. a kind of hydrogen gas sensor based on fiber coupler according to claim 1, it is characterised in that：Described optical fiber
The thickness for the Pd/Ag catalyst alloy powder that coupler is applied in the side of its coupled zone is 10-50 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720266576.1U CN206573479U (en) | 2017-03-16 | 2017-03-16 | A kind of hydrogen gas sensor based on fiber coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720266576.1U CN206573479U (en) | 2017-03-16 | 2017-03-16 | A kind of hydrogen gas sensor based on fiber coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206573479U true CN206573479U (en) | 2017-10-20 |
Family
ID=60054272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720266576.1U Expired - Fee Related CN206573479U (en) | 2017-03-16 | 2017-03-16 | A kind of hydrogen gas sensor based on fiber coupler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206573479U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108931486A (en) * | 2018-05-23 | 2018-12-04 | 长飞光纤光缆股份有限公司 | A kind of the fibre core absorption coefficient test macro and method of Yb dosed optical fiber |
-
2017
- 2017-03-16 CN CN201720266576.1U patent/CN206573479U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108931486A (en) * | 2018-05-23 | 2018-12-04 | 长飞光纤光缆股份有限公司 | A kind of the fibre core absorption coefficient test macro and method of Yb dosed optical fiber |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205691490U (en) | A kind of cascade connection type FPI hydrogen gas sensor based on cursor effect | |
| CN206618528U (en) | A kind of optical fiber air pressure sensing device based on multiple Fabry-Perot micro-cavities | |
| CN104390671B (en) | A kind of the liquid mass flow monitoring device and method of full optics | |
| CN106768474A (en) | The method and device of vernier enlarge-effect is produced based on single Sagnac interference rings | |
| CN102944328B (en) | Preparation method and measurement device for temperature sensor insensitive to refractive index | |
| CN103335958B (en) | Multiplexing optical fiber hydrogen sensor rapid to respond in low temperature environment | |
| CN105699327B (en) | A kind of detecting system and method for the laser based on micro-nano Er-doped fiber | |
| Zhang et al. | Simultaneous measurement of temperature and curvature based on hollow annular core fiber | |
| CN205920045U (en) | FPI hydrogen sensor based on vernier effect | |
| CN204881905U (en) | Temperature sensor of spherical structure optic fibre | |
| CN109682778A (en) | Femtosecond laser prepares fiber core mismatch type FBG temperature refraction rate measurement method | |
| CN109142781A (en) | A kind of wind speed measuring device and method based on surface plasma body resonant vibration | |
| CN206573479U (en) | A kind of hydrogen gas sensor based on fiber coupler | |
| Fang et al. | Improvement on refractive index sensing by exploiting the tapered two-mode fibers | |
| CN110927113A (en) | Fiber integrated hydrogen sensor and manufacturing method thereof | |
| CN112924048B (en) | High-sensitivity temperature sensor based on PDMS double-cavity parallel connection | |
| CN110208216A (en) | A kind of hydrogen sensing device of the thin-core fibers M-Z based on FBG | |
| Li et al. | An ultrasensitive gas pressure sensor based on single-core side-hole fiber with optical vernier effect | |
| CN114137273A (en) | Temperature sensitive current eliminating sensing device of FBG (fiber Bragg Grating) cascade optical fiber composite structure | |
| CN206656954U (en) | A kind of Sagnac interference-type optical fiber hydrogen gas sensors based on vernier enlarge-effect | |
| CN206161190U (en) | Optical fiber temperature sensor based on fluorescence intensity compares | |
| CN204286519U (en) | A kind of liquid mass flow monitoring device of full optics | |
| Jiang et al. | Precise measurement of liquid-level by fiber loop ring-down technique incorporating an etched fiber | |
| Li et al. | Compact Fabry-Perot microfiber interferometer temperature probe with closed end face | |
| Ascorbe et al. | Optical fiber humidity sensor based on a tapered fiber asymmetrically coated with indium tin oxide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171020 Termination date: 20180316 |