CN106198409A - A kind of gas concentration many reference amounts detection device - Google Patents
A kind of gas concentration many reference amounts detection device Download PDFInfo
- Publication number
- CN106198409A CN106198409A CN201610593814.XA CN201610593814A CN106198409A CN 106198409 A CN106198409 A CN 106198409A CN 201610593814 A CN201610593814 A CN 201610593814A CN 106198409 A CN106198409 A CN 106198409A
- Authority
- CN
- China
- Prior art keywords
- sensor
- ethane
- propane
- fluorosilicone
- methane
- 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.)
- Granted
Links
Classifications
-
- 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
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a kind of gas concentration many reference amounts detection device, including wideband light source, methane transducer, ethane sensor, propane sensor, humidity sensor, temperature sensor, photoswitch, test air chamber, computer and mass flow controller etc.；The front end of sensor connects wideband light source by photoswitch I；The rear end of sensor connects spectroanalysis instrument by photoswitch II；Sensor is positioned at test air chamber.The sensitive membrane wherein tilting LPFG methane, ethane and propane sensor is containing cage molecule (respectively cage molecule A, cage molecule E (OC3H7)6Or cage molecule M (OC3H7)6) and the low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene, when methane to be measured, ethane and propane interact with corresponding sensitive membrane, sensitive membrane refraction index changing can be caused, the transmission spectrum making methane, ethane and propane sensor drifts about, and can be measured the concentration of methane, ethane and propane by the drift value of spectroanalysis instrument transmission spectrum.
Description
Technical field
The present invention relates to a kind of gas concentration detection device, particularly relate to a kind of gas concentration many reference amounts detection device.
Background technology
Oil is lifelines of the national economy, oil reserve is stable supply-demand relationship, stabilize oil price, solution of emergent event the most straight
Connect, maximally effective means, oil is all laid in by various countries as strategic materials, forms the oil reserve that is made up of large-scale storage tank
Storehouse.Oil product volatility and diffusibility are relatively strong, have the features such as inflammable and explosive, accumulation of static electricity, thermal expansivity, supervise the most in real time
In surveying oil gas storage tank, volatility gas concentration is significant for oil gas storage tank safe operation.
The outer floating roof structure of the many employings of large-scale petroleum storing tank, the top cover on oil tank swims on pasta, along with floating downward on pasta
Dynamic.Wherein, the core of oil tank active defense is to control storage oil product and imflammable gas in the evaporating space of floating roof lid in oil tank
The ratio of (predominantly containing methane, ethane, the mixed gas of propane) concentration, away from explosion limit.At present, detection combustible gas
The method of body includes photoion gas sensor, catalytic combustion method gas sensor, resistance sensor, Fibre Optical Sensor etc.,
Wherein optical fiber sensing technology has the highest measurement sensitivity and quick responding ability, to temperature, humidity, strong electromagnetic
Resistance is relatively strong, has potential using value in oil gas is monitored.
He Jingxin etc., by analyzing methane gas optical fiber passive detection technique under crude oil accumulating environment, show that this technology can be real
Existing inflammable and explosive environment oil and gas detection, and there is high accuracy and stability feature.Jiang Desheng etc. are by carrying out storage tank operational factor
The optical fiber sensing technology research of monitoring, shows that it has crude oil storage tank Level Detection and warning, storage tank detection of negative pressure and warning, former
The features such as oil flow detection, water Level Detection and signal long-distance transmissions；Li Zhengying etc., on the basis of Spectrum Absorption Principle, grind
Fibre Optical Sensor and the system thereof of the detection of the various mixed gases such as acetylene/methane, methane/carbon monoxide are made, by two kinds not
The triangular modulation of the laser instrument of concentricity wavelength different frequency in addition, can calculate two kinds of gas concentrations through frequency analysis；Rhizoma Zingiberis Recens
Peaceful tunable diode laser absorption spectrometry technology and the optical division technology of using, formation multichannel optical fiber combustible gas monitoring system.
Zhao Yanjie etc. utilize temperature to affect the feature of semiconductor laser with tunable absorption spectrum formula gas-monitoring accuracy,
Propose a kind of optical fiber methane, temperature biparameter detecting system, methane, two kinds of parameter mutual corrections of temperature, gas-monitoring can be realized
With temperature survey.Wang Yutian etc. absorb the principle with concentration change and various multiplexing based on gas under absworption peak wavelength to light
Technology, develops optical-fibre multi-channel methane transducer, and remote passive sensing ensure that the safety that sensor probe is on-the-spot, can apply to
The most applicable occasion of traditional sensors.But spectral absorption formula gas measurement technique is easily by light source, ambient temperature, other gas
The interference of body absorption line etc., affects the measurement accuracy that gas to be measured is last.And phase modulation-type LPFG gas
Body sensor is then it can be avoided that interference, and based on the cage molecule A high selectivity feature to methane molecule, Yang Jianchun etc. proposes one
Plated film LPFG methane transducer, this sensor has the highest sensitivity to low-concentration methane gas.
Compared with LPFG, film-coating type tilts LPFG (TLPFG) and then has higher refraction
Rate sensitivity, because TLPFG is possible not only to excite core mode to couple to high-order (l > 1) cladding mode, it is also possible to improve core mode and 1
The coefficient of coup of rank cladding mode.The inclination that Chen Haiyun etc. have studied plated surface high index of refraction sensitive thin film based on coupled mode theory is long
Period optical fiber grating coupled characteristic and film refractive index sensing characteristics, show that refractive index sensitivity is compared to non-inclined long period light
Fine grating improves an order of magnitude, to the resolution of film refractive index up to 10-9.Yunhe Zhao etc. have studied different inclination angle
The TLPFG refractive index characteristic of degree, shows that the variations in refractive index of surrounding is had higher sensitive by the grating at bigger angle of inclination
Degree.Xiaolin Xue have studied a kind of inclined optical fiber grating sensor, it is achieved measures while temperature and refractive index, experiment
Show that this sensor has good temperature sensitivity and the highest refractive index sensitivity.
Analyze status both at home and abroad, find that current oil gas fuel gas detection technique is main or surveys for mixed gas
Amount, the fibre-optical sensing device simultaneously detected multiple gases in oil gas fuel gas (such as methane, ethane and propane) is not the most shown in
Report, and inclined optical fiber grating is sensitiveer compared to other Fibre Optical Sensors environment to external world, therefore can be used for oil gas flammable
The detection of gas.
Summary of the invention
In place of the deficiencies in the prior art, for giving full play to measuring multiple parameters, containing cage molecule (cage molecule
A, cage molecule E-(OC3H7)6Or cage molecule M-(OC3H7)6) and the low-refraction ultraviolet light polymerization fluorosilicone of Graphene quick
Sense film is to oil gas volatilization main component high selectivity, the wavelength-modulated of inclination LPFG (TLPFG) and refraction
The features such as rate is sensitive, propose a kind of gas concentration many reference amounts (main component methane, ethane, propane) measurement apparatus, and this sensed
Journey is to utilize (cage molecule A, cage molecule E-(OC Han cage molecule3H7)6Or cage molecule M-(OC3H7)6) and Graphene
It is dense that the inclination LPFG of low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane measures methane, ethane, propane respectively
Degree, and humidity and the temperature conduct of oil gas place environment is measured with humidity fiber-optic grating sensor and Temperature fiber Grating Sensor
To methane, ethane, the temperature and humidity compensation of propane sensor.Five sensors realize the many reference amounts to oil and gas environments together in parallel
Time measure, namely for methane, ethane, propane concentration, the measurement of temperature and humidity.
In order to solve above-mentioned technical problem, present invention employs following technical scheme:
Oil gas many reference amounts detection sensing device, including wideband light source, low-refraction ultraviolet containing cage molecule A and Graphene
The inclination LPFG methane transducer of light cured fluorine siloxanes sensitive membrane, containing cage molecule E-(OC3H7)6And graphite
The inclination LPFG ethane sensor of the low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of alkene, containing cage molecule
M-(OC3H7)6Pass with the inclination LPFG propane of the low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene
Sensor, humidity fiber-optic grating sensor, Temperature fiber Grating Sensor, photoswitch I, photoswitch II, test air chamber, computer and
Control methane, ethane, the input ratio of propane and nitrogen by the methane of variable concentrations, ethane, propane input test air chamber
Three mass flow controllers；Described methane transducer, ethane sensor, propane sensor, temperature sensor and humidity sensor
The front end of device connects wideband light source by photoswitch I；Described methane transducer, ethane sensor, propane sensor, temperature sensing
The rear end of device and humidity sensor connects spectroanalysis instrument by photoswitch II, and spectroanalysis instrument is connected with computer；Described first
Alkane sensor, ethane sensor, propane sensor, humidity sensor and temperature sensor are positioned at test air chamber, test air chamber
Having and be passed through methane to be measured, ethane, the air inlet of propane mixture body and gas outlet, air inlet connects control mixed gas to be measured
Three mass flow controllers；
Described methane transducer uses LPFG；Low-refraction containing cage molecule A and Graphene is purple
The preparation method of outer light cured fluorine siloxanes sensitive membrane is as follows: first cage molecule A is dissolved in dichloromethane, then molten to this mixing
Liquid adds low-refraction ultraviolet light polymerization fluorosilicone and Graphene, and uses ultrasonator mix homogeneously；Cage molecule A is
180 μm ol, dichloromethane 20mL, low-refraction ultraviolet light polymerization fluorosilicone 2mL, Graphene 0.18g；Containing cage molecule A and
The low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene is coated on inclination LPFG cladding surface；
Described ethane sensor uses LPFG；Containing cage molecule E-(OC3H7)6Low with Graphene
The preparation method of refractive index ultraviolet light polymerization fluorosilicone sensitive membrane is as follows: first by cage molecule E-(OC3H7)6It is dissolved in dichloromethane
Alkane, then adds low-refraction ultraviolet light polymerization fluorosilicone and Graphene in this mixed solution, and mixes with ultrasonator
Close uniformly；Cage molecule E-(OC3H7)6It is 180 μm ol, dichloromethane 20mL, low-refraction ultraviolet light polymerization fluorosilicone 2mL,
Graphene 0.18g；Containing cage molecule E-(OC3H7)6Coat with the low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene
In tilting LPFG cladding surface；
Described propane sensor uses LPFG；Containing cage molecule M-(OC3H7)6Low with Graphene
The preparation method of refractive index ultraviolet light polymerization fluorosilicone sensitive membrane is as follows: first by cage molecule M-(OC3H7)6It is dissolved in dichloromethane
Alkane, then adds low-refraction ultraviolet light polymerization fluorosilicone and Graphene in this mixed solution, and mixes with ultrasonator
Close uniformly；Cage molecule M-(OC3H7)6It is 180 μm ol, dichloromethane 20mL, low-refraction ultraviolet light polymerization fluorosilicone 2mL,
Graphene 0.18g；Containing cage molecule M-(OC3H7)6Coat with the low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene
In tilting LPFG cladding surface；
Described Fiber Bragg Grating Temperature sensor model number is OETMS-100A, scope-50～120 DEG C, 9 μm/125 μm
Optical fiber, O/E Land company of Canada.
Described optical fiber Bragg raster humidity sensor model is OEFHS-100A, centre wavelength 1550nm, scope 10～
100%RH, 9 μm/125 μm optical fiber, O/E Land company of Canada.
As a preferred embodiment of the present invention, tilt LPFG by healthy and free from worry SMF-28 single-mode fiber by shaking
Width mask means makes, and its parameter is screen periods 400～480 μm, grating length 10～20mm, 75 ° of angle of inclination, transmission loss
20～40dB, resonance wavelength initial value 1510～1590nm.
As the another kind of preferred version of the present invention, the described low-refraction UV-curing containing cage molecule A and Graphene
Changing fluorosilicone sensitive membrane is high index of refraction sensitive material, and its refractive index is 1.851.
As another preferred version of the present invention, described containing cage molecule E-(OC3H7)6Low-refraction with Graphene
Ultraviolet light polymerization fluorosilicone sensitive membrane is high index of refraction sensitive material, and its refractive index is 1.843.
As a modification of the present invention scheme, described containing cage molecule M-(OC3H7)6Purple with the low-refraction of Graphene
Outer light cured fluorine siloxanes sensitive membrane is high index of refraction sensitive material, and its refractive index is 1.848.
As the another kind of improvement project of the present invention, described wideband light source uses the DL-CS5014A of centre wavelength 1550nm
Superradiance wideband light source SLD, bandwidth 40nm.
As the another step improvement project of the present invention, described spectroanalysis instrument is 600～1700nm wave-length coverages
Agilent86140B spectroanalysis instrument.
Compared with prior art, the present invention has the following technical effect that
1, compared with existing LPFG methane transducer, tilt LPFG methane, ethane and
Propane sensor sensitivity has had and has increased substantially, and this is due in tilting LPFG (TLPFG), Oblique refractive
Rate modulation is possible not only to excite core mode to couple to high-order (l > 1) cladding mode, it is also possible to improve core mode and the coupling of 1 rank cladding mode
Syzygy number, thus the spectrum refractive index change of TLPFG has higher response sensitivity, i.e. quicker to sensitive membrane variations in refractive index
Sense.
2, cage molecule A is to methane, cage molecule E-(OC3H7)6To ethane and cage molecule M-(OC3H7)6Propane is divided
Not there is specific adsorption characteristic, and the refractive index of its material can change with the difference of gas concentration, so that
These materials have the highest sensitivity and selectivity to corresponding gas.This is due to cage molecule A, cage molecule E-
(OC3H7)6, cage molecule M-(OC3H7)6Cavity size be different from (wherein inner chamber window size be respectively ), these cavitys are respectively with methane, ethane, propane mutually
Join；After methane, ethane, propane respectively enter in corresponding material molecule cavity, meeting formation complex in combination, change material
The dipole moment of material molecule, thus change the refractive index of material.
3, use many reference amounts device that methane, ethane, propane, temperature and humidity are measured, add light path switching and
Spectroanalysis instrument is demodulated, it is possible to realize the selective measurement highly sensitive, high of fuel gas in oil gas.Light path switching is passed through
Photoswitch realizes, and utilizes time-division multiplex technology to realize methane transducer, ethane sensor, propane sensor, temperature sensor
Real-time measurement with humidity sensor.Meanwhile, temperature-humidity sensor can not only monitor the epidemic disaster of oil and gas environments in real time, protects
The safety of card oil-gas storage, its measured value can also revise epidemic disaster in real time on methane, ethane, the impact of propane sensor,
Realize the epidemic disaster to gas sensor to compensate.The present invention has measuring multiple parameters, highly sensitive, stability is high, selectivity is good
With features such as epidemic disaster compensation.
4, by containing cage molecule (cage molecule A, cage molecule E-(OC3H7)6Or cage molecule M-(OC3H7)6) and stone
The low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of ink alkene is to methane, ethane, propane gas high selectivity, inclination long week
The wavelength-modulated of phase fiber grating and the hypersensitivity of refractive index, and the combination of 100～250nm film thicknesses, make biography
Sensor is highly sensitive, fast response time.
Accompanying drawing explanation
Fig. 1 is the structural representation of oil gas many reference amounts detection sensing device.
Fig. 2 is methane transducer, ethane sensor and the structural representation of propane sensor.
Detailed description of the invention
With detailed description of the invention, the present invention is described in further detail below in conjunction with the accompanying drawings.
As it is shown in figure 1, a kind of oil gas many reference amounts detection sensing device includes wideband light source, containing cage molecule A and Graphene
Low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane inclination LPFG methane transducer, containing cage molecule E-
(OC3H7)6Inclination LPFG ethane sensing with the low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene
Device, containing cage molecule M-(OC3H7)6Inclination long period with the low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene
Fiber grating propane sensor, humidity fiber-optic grating sensor, Temperature fiber Grating Sensor, photoswitch I, photoswitch II, survey
Gas testing room, computer and control methane, ethane, the input ratio of propane and nitrogen by the methane of variable concentrations, ethane, propane
Three mass flow controllers of input test air chamber.Methane transducer, ethane sensor, propane sensor, temperature sensor
Wideband light source is connected by photoswitch I with the front end of humidity sensor.Methane transducer, ethane sensor, propane sensor, temperature
The rear end of degree sensor and humidity sensor connects spectroanalysis instrument by photoswitch II, and spectroanalysis instrument is connected with computer.
Methane transducer, ethane sensor, propane sensor, humidity sensor and temperature sensor are positioned at test air chamber, test gas
Room has and is passed through methane to be measured, ethane, the air inlet of propane mixture body and gas outlet, and air inlet connects and controls mixed gas to be measured
Three mass flow controllers (i.e. mass flow controller I, mass flow controller II and mass flow controller III).
Methane transducer uses LPFG, the low-refraction ultraviolet light containing cage molecule A and Graphene
The preparation method of solidification fluorosilicone sensitive membrane is as follows: first cage molecule A is dissolved in dichloromethane, then in this mixed solution
Add low-refraction ultraviolet light polymerization fluorosilicone and Graphene, and use ultrasonator mix homogeneously；Cage molecule A is 180 μ
Mol, dichloromethane 20mL, low-refraction ultraviolet light polymerization fluorosilicone 2mL, Graphene 0.18g；Containing cage molecule A and graphite
The low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of alkene is coated on inclination LPFG cladding surface.Ethane senses
Device uses LPFG, containing cage molecule E-(OC3H7)6Low-refraction ultraviolet light polymerization fluorine silicon with Graphene
The preparation method of oxygen alkane sensitive membrane is as follows: first by cage molecule E-(OC3H7)6It is dissolved in dichloromethane, then in this mixed solution
Add low-refraction ultraviolet light polymerization fluorosilicone and Graphene, and use ultrasonator mix homogeneously；Cage molecule E-
(OC3H7)6It is 180 μm ol, dichloromethane 20mL, low-refraction ultraviolet light polymerization fluorosilicone 2mL, Graphene 0.18g；Containing cage
Shape molecule E-(OC3H7)6It is coated on inclination long period optical fiber with the low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene
Grating cladding surface.Propane sensor uses LPFG, containing cage molecule M-(OC3H7)6Low with Graphene
The preparation method of refractive index ultraviolet light polymerization fluorosilicone sensitive membrane is as follows: first by cage molecule M-(OC3H7)6It is dissolved in dichloromethane
Alkane, then adds low-refraction ultraviolet light polymerization fluorosilicone and Graphene in this mixed solution, and mixes with ultrasonator
Close uniformly；Cage molecule M-(OC3H7)6It is 180 μm ol, dichloromethane 20mL, low-refraction ultraviolet light polymerization fluorosilicone 2mL,
Graphene 0.18g；Containing cage molecule M-(OC3H7)6Coat with the low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene
In tilting LPFG cladding surface.
Tilting LPFG to be made by amplitude mask method by healthy and free from worry SMF-28 single-mode fiber, its parameter is grating
Cycle 400～480 μm, grating length 10～20mm, 75 ° of angle of inclination, transmission loss 20～40dB, resonance wavelength initial value
1510～1590nm.Low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane containing cage molecule A and Graphene is high index of refraction
Sensitive material, its refractive index is 1.851.Containing cage molecule E-(OC3H7)6Low-refraction ultraviolet light polymerization fluorine silicon with Graphene
Oxygen alkane sensitive membrane is high index of refraction sensitive material, and its refractive index is 1.843.Containing cage molecule M-(OC3H7)6Low with Graphene
Refractive index ultraviolet light polymerization fluorosilicone sensitive membrane is high index of refraction sensitive material, and its refractive index is 1.848.Cage molecule A, cage
Shape molecule E-(OC3H7)6, cage molecule M-(OC3H7)6Molecular weight be respectively 894.99,1090.39,1104.41；Inner chamber window
Mouth size is respectivelyCan distinguish only to methane, ethane and third
Alkane gas has response, to non-measured gases such as oxygen, nitrogen, carbon dioxide, carbon monoxide, hydrogen sulfide almost without response, performance
Go out good selectivity.Humidity sensor and temperature sensor are that Canadian O/E Land company produces.Wideband light source uses
The DL-CS5014A superradiance wideband light source SLD of centre wavelength 1550nm, bandwidth 40nm.Photoswitch I and photoswitch II are
The 1X8FSW-OSW of iseelink company.Spectroanalysis instrument is the Agilent 86140B spectrum of 600～1700nm wave-length coverages
Analyser.Inclination Resonant Wavelengths of Long Period Fiber Gratings amount of movement Δ λ is the grating resonance wave after sensor contacts gas to be measured
The long difference with sensor aerial grating resonance wavelength.
The work process of this detection device is as follows:
(1) work process of single unit system
As shown in Figure 1.Light is sent by wideband light source, and by photoswitch I, (in the present embodiment, photoswitch I uses 1 to enter 8 to go out light
Switch) it is connected with methane transducer, ethane sensor, propane sensor, humidity sensor and temperature sensor, in photoswitch I
Remain 3 outlets vacant.Methane transducer, ethane sensor, propane sensor, humidity sensor and the rear end of temperature sensor
Connecting spectroanalysis instrument by photoswitch II, spectroanalysis instrument is connected with computer again.Methane transducer, ethane sensor,
Propane sensor, humidity sensor and temperature sensor are simultaneously placed to test in air chamber, three mass flow controller controls
The input ratio of methane processed, ethane, propane and nitrogen, is persistently inputted the methane of variable concentrations, ethane, propane by air inlet
Test air chamber, test air chamber gas outlet is in opening-wide state all the time, and the gas being beneficial to test in air chamber is excluded.
(2) work process of single sensor
The structure of methane transducer, ethane sensor and propane sensor is identical, and (in Fig. 2,1 for containing as shown in Figure 2
The low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of cage molecule A and Graphene, 2 is covering, and 3 for tilting long period optical fiber
Grating, 4 is fiber core), fiber grating inclination is scribed in fiber core 4.Incident illumination enter fiber core 4, emergent light from
Fiber core 4 outgoing.The inclination LPFG cycle is Λg.Tilting LPFG uses healthy and free from worry SMF-28 mono-
Mode fiber, is made by amplitude mask method, and its parameter is screen periods 400～480 μm, grating length 10～20mm, transmission loss
20～40dB, resonance wavelength initial value 1520～1580nm, angle of inclination are 75 °；Use dip-coating method by cage molecule A and
The low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene is coated on LPFG covering 2 surface；Healthy and free from worry
About SMF-28 single-mode fiber core diameter 9 μm, cladding diameter 125 μm.
Tilting the preparation of LPFG covering 2 surface containing cage molecule A and the low-refraction ultraviolet light of Graphene
Solidify fluorosilicone methane sensitive membrane 1, containing cage molecule E-(OC3H7)6Low-refraction ultraviolet light polymerization fluorine silica with Graphene
Alkane ethane sensitive membrane, containing cage molecule M-(OC3H7)6Sensitive with the low-refraction ultraviolet light polymerization fluorosilicone propane of Graphene
The process of film is as follows:
(1) distilled water, dehydrated alcohol, acetone etc. are used to carry out respectively tilting LPFG cladding surface successively
Clean, after cleaning, put into 60 DEG C of dry 20min in vacuum drying oven.
(2) 180 μm ol cage molecule A, cage molecule E-(OC are weighed3H7)6, cage molecule M-(OC3H7)6, it is dissolved in
20mL dichloromethane, then adds low-refraction ultraviolet light polymerization fluorosilicone 2mL, Graphene 0.18g in this mixed solution,
And the solution of mix homogeneously is formed with ultrasonator stirring.
(3) with dip-coating method, the low-refraction ultraviolet light polymerization fluorosilicone containing cage molecule and Graphene is slowly coated with
It is layed onto inclined optical fiber grating cladding surface, is coated with the inclined optical fiber grating being covered with film with slowly extraction, pull rate 11cm/min.
(4) inclined optical fiber grating having been coated with sensitive membrane being put into vacuum drying oven, 50 DEG C～60 DEG C are incubated 2 hours, obtain
Obtain the sensitive membrane that uniformity is good；By repeatedly coating, making sensitive membrane thickness is 100～250nm.
Methane transducer, ethane sensor are different with the size of propane sensor three only cage molecule, and other are the most identical,
The most identical including its sensing principle.The most here it is introduced as a example by methane.
Tilt Resonant Wavelengths of Long Period Fiber Gratings λmIt is given by:
Wherein,For fibre core effective index of fundamental mode,It is m rank cladding mode effective refractive index, ΛgFor tilting long week
Fiber grating cycle phase.
When variable concentrations methane gas be coated on tilt LPFG cladding surface containing cage molecule A and stone
When the low-refraction ultraviolet light polymerization fluorosilicone methane sensitive membrane of ink alkene contacts, there is change in methane sensitive membrane refractive index, and
The change of sensitive membrane refractive index will cause cladding mode effective refractive indexChange, and then make fibre core basic mode and cladding mode effective
Refractive index difference changes；Due to grating period AgFor definite value, Resonant Wavelengths of Long Period Fiber Gratings λ in above formulamAlso will send out
Changing；And resonance wavelength amount of movement Δ λ is demodulated by spectra methods, use spectroanalysis instrument detection grating resonance wave
Long situation of movement, by grating resonance wavelength before and after analysis methane transducer contacting methane gasmAmount of movement Δ λ, set up
Relation between concentration of methane gas c and grating resonance wavelength amount of movement Δ λ；Detection methane transducer connects with methane gas to be measured
Grating resonance wavelength amount of movement Δ λ before and after Chuing, can obtain concentration of methane gas to be measured, and by humidity sensor and temperature sensing
Amount of movement Δ λ is compensated by the value that device records.
Ethane is identical with the above with the work process of propane sensor, does not repeats them here.
Embodiment 1
Tilt the LPFG cladding surface coating methane transducer of sensitive membrane, ethane sensor and propane sensing
Device, screen periods 400 μm, periodicity 40, grating length 16mm, 75 ° of angle of inclination, transmission loss be respectively 32.6dB, 31dB,
33.5dB, resonance wavelength initial value is respectively 1558.54nm, 1559.6nm, 1558.0nm.With methane concentration (0～5% (v/
V)), to be the calibrating gas of (0～2.1% (v/v)) be object for ethane concentration (0～2.9% (v/v)) and propane concentration, respectively
Have an effect with the sensitive membrane of grating cladding surface, grating resonance wavelength increase with methane, ethane and propane gas concentration and to
Long wavelength moves in direction, and the most relevant between resonance wavelength amount of movement to methane, ethane and propane concentration.
The methane Standard Gases using known methane concentration to be 0,0.5,1.0,2.5,3.5,4.0,5.0% (v/v) in experiment
Body detects, corresponding methane grating resonance wavelength amount of movement Δ λ1Be respectively 0,0.63,1.06,2.38,3.23,4.10,
4.50nm, its equation of linear regression is: Δ λ1=0.9174c1+ 0.1090, coefficient R2=0.990, c in formula1For first to be measured
Alkane gas concentration, Δ λ1For tilting Resonant Wavelengths of Long Period Fiber Gratings amount of movement.
The ethane Standard Gases using known ethane concentration to be 0,0.5,1.0,1.5,2.0,2.5,2.9% (v/v) in experiment
Body detects, corresponding methane grating resonance wavelength amount of movement Δ λ2Be respectively 0,0.50,0.98,1.35,1.84,2.32,
2.75nm, its equation of linear regression is: Δ λ2=0.9300c2+ 0.0097, coefficient R2=0.998, c in formula2For second to be measured
Alkane gas concentration, Δ λ2For tilting Resonant Wavelengths of Long Period Fiber Gratings amount of movement.
The propane Standard Gases using known propane concentration to be 0,0.5,0.7,1.0,1.3,1.7,2.1% (v/v) in experiment
Body detects, corresponding ethane grating resonance wavelength amount of movement Δ λ3Be respectively 0,0.36,0.64,0.93,1.20,1.58,
1.95nm, its equation of linear regression is: Δ λ3=0.9475c3-0.0367, coefficient R2=0.996, c in formula3For to be measured third
Alkane gas concentration, Δ λ3For tilting Resonant Wavelengths of Long Period Fiber Gratings amount of movement.
Simultaneously with fiber-optical grating temperature sensor and fiber bragg grating temperature sensor record this experiment air chamber temperature and
Humidity is respectively 25 DEG C, 56%RH.
After the sensitive membrane of methane gas to be measured with grating cladding surface contacts, grating resonance wavelength amount of movement Δ λ1For
1.7nm, can calculate concentration of methane gas c to be measured1=1.7%, its response speed is 40 seconds, and recovery time is 50 seconds；When treating
After survey ethane gas contacts with the sensitive membrane of grating cladding surface, grating resonance wavelength amount of movement Δ λ2For 1nm, can calculate and treat
Survey ethane gas concentration c2=0.9%, its response speed is 41 seconds, and recovery time is 52 seconds；When propane gas to be measured and grating
After the sensitive membrane contact of cladding surface, grating resonance wavelength amount of movement Δ λ3For 1.7nm, propane gas concentration to be measured can be calculated
c3=1.7%, its response speed is 41 seconds, and recovery time is 50 seconds.
Measuring methane transducer, ethane sensor, the temperature response curve of propane sensor, temperature is by fiber Bragg light
Grid temperature sensor is demarcated.Grating resonance wavelength increases with temperature and moves to long wavelength direction, and resonance wavelength moves
Measure the most relevant between temperature.
Experiment uses known temperature be 20,30,40,60,80,100 DEG C to detect, corresponding methane grating resonance wavelength
Amount of movement Δ λ4Be respectively 0,0.05,0.08,0.13,0.17,0.21nm, its equation of linear regression is: Δ λ4=0.0025T-
0.0311, coefficient R2=0.976；Corresponding ethane grating resonance wavelength amount of movement Δ λ5Be respectively 0,0.04,0.07,0.13,
0.16,0.22nm, its equation of linear regression is: Δ λ5=0.0026T-0.0414, coefficient R2=0.986；Corresponding propane light
Grid resonance wavelength amount of movement Δ λ6Be respectively 0,0.06,0.07,0.12,0.16,0.21nm, its equation of linear regression is: Δ λ6=
0.0024T-0.0298, coefficient R2=0.992.In formula, T is the testing temperature for the treatment of of methane, ethane and propane sensor, Δ λ4For
Methane tilts Resonant Wavelengths of Long Period Fiber Gratings amount of movement, Δ λ5Tilt Resonant Wavelengths of Long Period Fiber Gratings for ethane to move
Amount, Δ λ6Resonant Wavelengths of Long Period Fiber Gratings amount of movement is tilted for propane.
Measuring methane transducer, ethane sensor, the humidity response curve of propane sensor, humidity is by fiber Bragg light
Grid humidity sensor is demarcated.Grating resonance wavelength increases with humidity and moves to short wavelength direction, and resonance wavelength moves
Measure the most relevant between humidity.
To use known humidity in experiment be 20,30,40,60,80,100%RH detect, corresponding methane grating resonance wave
Long amount of movement Δ λ7Be respectively 0 ,-0.02 ,-0.05 ,-0.08 ,-0.11 ,-0.14nm, its equation of linear regression is: Δ λ7=-
0.0017H+0.0283, coefficient R2=0.986；Corresponding ethane grating resonance wavelength amount of movement Δ λ8Be respectively 0 ,-0.01 ,-
0.04 ,-0.07 ,-0.11 ,-0.13nm, its equation of linear regression is: Δ λ8=-0.0017H+0.0338, coefficient R2=
0.986；Corresponding propane grating resonance wavelength amount of movement Δ λ8Be respectively 0 ,-0.01 ,-0.04 ,-0.07 ,-0.11 ,-0.13nm,
Its equation of linear regression is: Δ λ8=-0.0017H+0.0338, coefficient R2=0.986.In formula, H is methane, ethane and third
Alkane sensor treat measuring moisture, Δ λ7Resonant Wavelengths of Long Period Fiber Gratings amount of movement, Δ λ is tilted for methane8Tilt long for ethane
Period optical fiber grating resonance wavelength amount of movement, Δ λ8Resonant Wavelengths of Long Period Fiber Gratings amount of movement is tilted for propane.
So, final methane transducer, ethane sensor, propane sensor are under epidemic disaster compensates, and its linear equation divides
It is not:
Temperature when T represents measurement, humidity when H represents measurement.
Methane transducer:
Δλ1=0.9174c1+0.1090-[0.0025(T-25)-0.0311]-[-0.0017(H-56)+0.0283]
Ethane sensor:
Δλ2=0.9300c2+0.0097-[0.0026(T-25)-0.0414]-[-0.0017(H-56)+0.0338]
Propane sensor:
Δλ3=0.9475c3-0.0367-[0.0024(T-25)-0.0298]-[-0.0016(H-56)+0.0280]。
Embodiment 2
Tilt the LPFG cladding surface coating methane transducer of sensitive membrane, ethane sensor and propane sensing
Device, screen periods 430 μm, periodicity 40, grating length 17.2mm, 75 ° of angle of inclination, transmission loss be respectively 31.5dB,
32.4dB, 32.9dB, resonance wavelength initial value is respectively 1557.64nm, 1558.4nm, 1557.5nm.With methane concentration (0～
5% (v/v)), to be the calibrating gas of (0～2.1% (v/v)) be right for ethane concentration (0～2.9% (v/v)) and propane concentration
As, the sensitive membrane with grating cladding surface is had an effect respectively, and grating resonance wavelength increases with methane, ethane and propane gas concentration
Add and move to long wavelength direction, and the most relevant between resonance wavelength amount of movement to methane, ethane and propane concentration.
The methane Standard Gases using known methane concentration to be 0,0.5,1.0,2.5,3.5,4.0,5.0% (v/v) in experiment
Body detects, corresponding methane grating resonance wavelength amount of movement Δ λ1Be respectively 0,0.72,1.08,2.42,3.20,4.15,
4.60nm, its equation of linear regression is: Δ λ1=0.9230c1+ 0.1343, coefficient R2=0.990, c in formula1For first to be measured
Alkane gas concentration, Δ λ1For tilting Resonant Wavelengths of Long Period Fiber Gratings amount of movement.
The ethane Standard Gases using known ethane concentration to be 0,0.5,1.0,1.5,2.0,2.5,2.9% (v/v) in experiment
Body detects, corresponding ethane grating resonance wavelength amount of movement Δ λ2Be respectively 0,0.65,1.12,1.43,1.99,2.50,
2.85nm, its equation of linear regression is: Δ λ2=0.9578c2+ 0.0827, coefficient R2=0.994, c in formula2For second to be measured
Alkane gas concentration, Δ λ2For tilting Resonant Wavelengths of Long Period Fiber Gratings amount of movement.
The propane Standard Gases using known propane concentration to be 0,0.5,0.7,1.0,1.3,1.7,2.1% (v/v) in experiment
Body detects, corresponding propane grating resonance wavelength amount of movement Δ λ3Be respectively 0,0.39,0.68,0.97,1.26,1.62,
1.97nm, its equation of linear regression is: Δ λ3=0.9575c3-0.0143, coefficient R2=0.996, c in formula3For to be measured third
Alkane gas concentration, Δ λ3For tilting Resonant Wavelengths of Long Period Fiber Gratings amount of movement.
Simultaneously with fiber-optical grating temperature sensor and fiber bragg grating temperature sensor record this experiment air chamber temperature and
Humidity is respectively 26 DEG C, 65%RH.
After the sensitive membrane of methane gas to be measured with grating cladding surface contacts, grating resonance wavelength amount of movement Δ λ1For
1.2nm, can calculate concentration of methane gas c to be measured1=1.1%, its response speed is 43 seconds, and recovery time is 52 seconds；When treating
After survey ethane gas contacts with the sensitive membrane of grating cladding surface, grating resonance wavelength amount of movement Δ λ2For 1.5nm, can calculate
Ethane gas concentration c to be measured2=1.5%, its response speed is 42 seconds, and recovery time is 51 seconds；When propane gas to be measured and light
After the sensitive membrane contact of grid cladding surface, grating resonance wavelength amount of movement Δ λ3For 1.1nm, propane gas to be measured can be calculated dense
Degree c3=1%, its response speed is 42 seconds, and recovery time is 52 seconds.
Measuring methane transducer, ethane sensor, the temperature response curve of propane sensor, temperature is by fiber Bragg light
Grid temperature sensor is demarcated.Grating resonance wavelength increases with temperature and moves to long wavelength direction, and resonance wavelength moves
Measure the most relevant between temperature.
Experiment uses known temperature be 20,30,40,60,80,100 DEG C to detect, corresponding methane grating resonance wavelength
Amount of movement Δ λ4Be respectively 0,0.04,0.07,0.12,0.16,0.20nm, its equation of linear regression is: Δ λ4=0.0024T-
0.0354, coefficient R2=0.986；Corresponding ethane grating resonance wavelength amount of movement Δ λ5Be respectively 0,0.03,0.06,0.14,
0.17,0.21nm, its equation of linear regression is: Δ λ5=0.0027T-0.0460, coefficient R2=0.974；Corresponding propane light
Grid resonance wavelength amount of movement Δ λ6Be respectively 0,0.05,0.08,0.12,0.15,0.20nm, its equation of linear regression is: Δ λ6=
0.0023T-0.0262, coefficient R2=0.968.In formula, T is the testing temperature for the treatment of of methane, ethane and propane sensor, Δ λ4For
Methane tilts Resonant Wavelengths of Long Period Fiber Gratings amount of movement, Δ λ5Tilt Resonant Wavelengths of Long Period Fiber Gratings for ethane to move
Amount, Δ λ6Resonant Wavelengths of Long Period Fiber Gratings amount of movement is tilted for propane.
Measuring methane, ethane, the humidity response curve of propane sensor, humidity is by optical fiber Bragg raster humidity sensor
Demarcate.Grating resonance wavelength increases with humidity and moves to short wavelength direction, and between resonance wavelength amount of movement and humidity
Linearly it is correlated with.
To use known humidity in experiment be 20,30,40,60,80,100%RH detect, corresponding methane grating resonance wave
Long amount of movement Δ λ7Be respectively 0 ,-0.02 ,-0.04 ,-0.07 ,-0.11 ,-0.15nm, its equation of linear regression is: Δ λ7=-
0.0018H+0.0363, coefficient R2=0.998；Corresponding ethane grating resonance wavelength amount of movement Δ λ8Be respectively 0 ,-0.02 ,-
0.04 ,-0.06 ,-0.10 ,-0.14nm, its equation of linear regression is: Δ λ8=-0.0017H+0.0326, coefficient R2=
0.990；Corresponding propane grating resonance wavelength amount of movement Δ λ9Be respectively 0 ,-0.02 ,-0.05 ,-0.08 ,-0.12 ,-0.16nm,
Its equation of linear regression is: Δ λ9=-0.0020H+0.0366, coefficient R2=0.994.In formula, H is methane, ethane and third
Alkane sensor treat measuring moisture, Δ λ7Resonant Wavelengths of Long Period Fiber Gratings amount of movement, Δ λ is tilted for methane8Tilt long for ethane
Period optical fiber grating resonance wavelength amount of movement, Δ λ8Resonant Wavelengths of Long Period Fiber Gratings amount of movement is tilted for propane.
So, final methane transducer, ethane sensor, propane sensor are under epidemic disaster compensates, and its linear equation divides
It is not:
Temperature when T represents measurement, humidity when H represents measurement.
Methane transducer:
Δλ1=0.9230c1+0.1343-[0.0024(T-26)-0.0354]-[-0.0018(H-65)+0.0363]
Ethane sensor:
Δλ2=0.9578c2+0.0827-[0.0027(T-26)-0.0460]-[-0.0017(H-65)+0.0326]
Propane sensor:
Δλ3=0.9575c3-0.0143-[0.0023(T-26)-0.0262]-[-0.0020(H-65)+0.0366]。
Embodiment 3
Tilt the LPFG cladding surface coating methane transducer of sensitive membrane, ethane sensor and propane sensing
Device, screen periods 450 μm, periodicity 40, grating length 18mm, 75 ° of angle of inclination, transmission loss be respectively 32.5dB,
32.8dB, 33.9dB, resonance wavelength initial value is respectively 1556.68nm, 1558.6nm, 1557.2nm.With methane concentration (0～
5% (v/v)), to be the calibrating gas of (0～2.1% (v/v)) be right for ethane concentration (0～2.9% (v/v)) and propane concentration
As, the sensitive membrane with grating cladding surface is had an effect respectively, and grating resonance wavelength increases with methane, ethane and propane gas concentration
Add and move to long wavelength direction, and the most relevant between resonance wavelength amount of movement to methane, ethane and propane concentration.
The methane Standard Gases using known methane concentration to be 0,0.5,1.0,2.5,3.5,4.0,5.0% (v/v) in experiment
Body detects, corresponding methane grating resonance wavelength amount of movement Δ λ1Be respectively 0,0.78,1.12,2.46,3.24,4.19,
4.66nm, its equation of linear regression is: Δ λ1=0.9281c1+ 0.1624, coefficient R2=0.988, c in formula1For first to be measured
Alkane gas concentration, Δ λ1For tilting Resonant Wavelengths of Long Period Fiber Gratings amount of movement.
The ethane Standard Gases using known ethane concentration to be 0,0.5,1.0,1.5,2.0,2.5,2.9% (v/v) in experiment
Body detects, corresponding ethane grating resonance wavelength amount of movement Δ λ2Be respectively 0,0.70,1.22,1.50,2.04,2.56,
2.95nm, its equation of linear regression is: Δ λ2=0.9774c2+ 0.1151, coefficient R2=0.992, c in formula2For second to be measured
Alkane gas concentration, Δ λ2For tilting Resonant Wavelengths of Long Period Fiber Gratings amount of movement.
The propane Standard Gases using known propane concentration to be 0,0.5,0.7,1.0,1.3,1.7,2.1% (v/v) in experiment
Body detects, corresponding propane grating resonance wavelength amount of movement Δ λ3Be respectively 0,0.41,0.71,0.98,1.29,1.64,
1.99nm, its equation of linear regression is: Δ λ3=0.9641c3-0.0025, coefficient R2=0.996, c in formula3For to be measured third
Alkane gas concentration, Δ λ3For tilting Resonant Wavelengths of Long Period Fiber Gratings amount of movement.
Simultaneously with fiber-optical grating temperature sensor and fiber bragg grating temperature sensor record this experiment air chamber temperature and
Humidity is respectively 28 DEG C, 60%RH.
After the sensitive membrane of methane gas to be measured with grating cladding surface contacts, grating resonance wavelength amount of movement Δ λ1For
2.2nm, can calculate concentration of methane gas c to be measured1=2.2%, its response speed is 41 seconds, and recovery time is 53 seconds；When treating
After survey ethane gas contacts with the sensitive membrane of grating cladding surface, grating resonance wavelength amount of movement Δ λ2For 1.8nm, can calculate
Ethane gas concentration c to be measured2=1.9%, its response speed is 42 seconds, and recovery time is 53 seconds；When propane gas to be measured and light
After the sensitive membrane contact of grid cladding surface, grating resonance wavelength amount of movement Δ λ3For 1.5nm, propane gas to be measured can be calculated dense
Degree c3=1.4%, its response speed is 40 seconds, and recovery time is 52 seconds.
Measuring methane transducer, ethane sensor, the temperature response curve of propane sensor, temperature is by fiber Bragg light
Grid temperature sensor is demarcated.Grating resonance wavelength increases with temperature and moves to long wavelength direction, and resonance wavelength moves
Measure the most relevant between temperature.
Experiment uses known temperature be 20,30,40,60,80,100 DEG C to detect, corresponding methane grating resonance wavelength
Amount of movement Δ λ4Be respectively 0,0.03,0.07,0.12,0.16,0.21nm, its equation of linear regression is: Δ λ4=0.0026T-
0.0435, coefficient R2=0.990；Corresponding ethane grating resonance wavelength amount of movement Δ λ5Be respectively 0,0.05,0.08,0.13,
0.17,0.21nm, its equation of linear regression is: Δ λ5=0.0025T-0.0311, coefficient R2=0.976；Corresponding propane light
Grid resonance wavelength amount of movement Δ λ6Be respectively 0,0.04,0.07,0.12,0.17,0.22nm, its equation of linear regression is: Δ λ6=
0.0027T-0.0437, coefficient R2=0.994.In formula, T is the testing temperature for the treatment of of methane, ethane and propane sensor, Δ λ4For
Methane tilts Resonant Wavelengths of Long Period Fiber Gratings amount of movement, Δ λ5Tilt Resonant Wavelengths of Long Period Fiber Gratings for ethane to move
Amount, Δ λ6Resonant Wavelengths of Long Period Fiber Gratings amount of movement is tilted for propane.
Measuring methane transducer, ethane sensor, the humidity response curve of propane sensor, humidity is by fiber Bragg light
Grid humidity sensor is demarcated.Grating resonance wavelength increases with humidity and moves to short wavelength direction, and resonance wavelength moves
Measure the most relevant between humidity.
To use known humidity in experiment be 20,30,40,60,80,100%RH detect, corresponding methane grating resonance wave
Long amount of movement Δ λ7Be respectively 0 ,-0.03 ,-0.06 ,-0.08 ,-0.13 ,-0.17nm, its equation of linear regression is: Δ λ7=-
0.0020H+0.0334, coefficient R2=0.986；Corresponding ethane grating resonance wavelength amount of movement Δ λ8Be respectively 0 ,-0.03 ,-
0.05 ,-0.08 ,-0.12 ,-0.16nm, its equation of linear regression is: Δ λ8=-0.0019H+0.0320, coefficient R2=
0.994；Corresponding propane grating resonance wavelength amount of movement Δ λ9Be respectively 0 ,-0.04 ,-0.07 ,-0.11 ,-0.15 ,-0.19nm,
Its equation of linear regression is: Δ λ9=-0.0023H+0.0317, coefficient R2=0.984.In formula, H is methane, ethane and third
Alkane sensor treat measuring moisture, Δ λ7Resonant Wavelengths of Long Period Fiber Gratings amount of movement, Δ λ is tilted for methane8Tilt long for ethane
Period optical fiber grating resonance wavelength amount of movement, Δ λ8Resonant Wavelengths of Long Period Fiber Gratings amount of movement is tilted for propane.
So, final methane transducer, ethane sensor, propane sensor are under epidemic disaster compensates, and its linear equation divides
It is not:
Temperature when T represents measurement, humidity when H represents measurement.
Methane transducer:
Δλ1=0.9281c1+0.1624-[0.0026(T-28)-0.0435]-[-0.0020(H-60)+0.0334]
Ethane sensor:
Δλ2=0.9774c2+0.1151-[0.0025(T-28)-0.0311]-[-0.0019(H-60)+0.0320]
Propane sensor:
Δλ3=0.9641c3-0.0025-[0.0027(T-28)-0.0437]-[-0.0023(H-60)+0.0317]。
Claims (7)
1. a gas concentration many reference amounts detection device, it is characterised in that: include wideband light source, containing cage molecule A and Graphene
Low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane inclination LPFG methane transducer, containing cage molecule E-
(OC3H7)6Inclination LPFG ethane sensing with the low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene
Device, containing cage molecule M-(OC3H7)6Inclination long period with the low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene
Fiber grating propane sensor, humidity fiber-optic grating sensor, Temperature fiber Grating Sensor, photoswitch I, photoswitch II, survey
Gas testing room, computer and control methane, ethane, the input ratio of propane and nitrogen by the methane of variable concentrations, ethane, propane
Three mass flow controllers of input test air chamber；Described methane transducer, ethane sensor, propane sensor, temperature pass
The front end of sensor and humidity sensor connects wideband light source by photoswitch I；Described methane transducer, ethane sensor, propane
The rear end of sensor, temperature sensor and humidity sensor connects spectroanalysis instrument, spectroanalysis instrument and meter by photoswitch II
Calculation machine connects；Described methane transducer, ethane sensor, propane sensor, humidity sensor and temperature sensor are positioned at test
In air chamber, test air chamber has and is passed through methane to be measured, ethane, the air inlet of propane mixture body and gas outlet, and air inlet connects control
Make three mass flow controllers of mixed gas to be measured；
Described methane transducer uses LPFG；Low-refraction ultraviolet light containing cage molecule A and Graphene
The preparation method of solidification fluorosilicone sensitive membrane is as follows: first cage molecule A is dissolved in dichloromethane, then in this mixed solution
Add low-refraction ultraviolet light polymerization fluorosilicone and Graphene, and use ultrasonator mix homogeneously；Cage molecule A is 180 μ
Mol, dichloromethane 20mL, low-refraction ultraviolet light polymerization fluorosilicone 2mL, Graphene 0.18g；Containing cage molecule A and graphite
The low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of alkene is coated on inclination LPFG cladding surface；
Described ethane sensor uses LPFG；Containing cage molecule E-(OC3H7)6Low refraction with Graphene
The preparation method of rate ultraviolet light polymerization fluorosilicone sensitive membrane is as follows: first by cage molecule E-(OC3H7)6It is dissolved in dichloromethane, so
This mixed solution backward adds low-refraction ultraviolet light polymerization fluorosilicone and Graphene, and equal with ultrasonator mixing
Even；Cage molecule E-(OC3H7)6It is 180 μm ol, dichloromethane 20mL, low-refraction ultraviolet light polymerization fluorosilicone 2mL, graphite
Alkene 0.18g；Containing cage molecule E-(OC3H7)6It is coated on the low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene and inclines
Plagioclase period optical fiber grating cladding surface；
Described propane sensor uses LPFG；Containing cage molecule M-(OC3H7)6Low refraction with Graphene
The preparation method of rate ultraviolet light polymerization fluorosilicone sensitive membrane is as follows: first by cage molecule M-(OC3H7)6It is dissolved in dichloromethane, so
This mixed solution backward adds low-refraction ultraviolet light polymerization fluorosilicone and Graphene, and equal with ultrasonator mixing
Even；Cage molecule M-(OC3H7)6It is 180 μm ol, dichloromethane 20mL, low-refraction ultraviolet light polymerization fluorosilicone 2mL, graphite
Alkene 0.18g；Containing cage molecule M-(OC3H7)6It is coated on the low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene and inclines
Plagioclase period optical fiber grating cladding surface.
Gas concentration many reference amounts the most according to claim 1 detection device, it is characterised in that: tilt LPFG
Being made by amplitude mask method by healthy and free from worry SMF-28 single-mode fiber, its parameter is screen periods 400～480 μm, grating length 10
～20mm, 75 ° of angle of inclination, transmission loss 20～40dB, resonance wavelength initial value 1510～1590nm.
Gas concentration many reference amounts the most according to claim 1 detection device, it is characterised in that: described containing cage molecule A and
The low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene is high index of refraction sensitive material, and its refractive index is 1.851.
Gas concentration many reference amounts the most according to claim 1 detection device, it is characterised in that: described containing cage molecule E-
(OC3H7)6It is high index of refraction sensitive material with the low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene, its refractive index
It is 1.843.
Gas concentration many reference amounts the most according to claim 1 detection device, it is characterised in that: described containing cage molecule M-
(OC3H7)6It is high index of refraction sensitive material with the low-refraction ultraviolet light polymerization fluorosilicone sensitive membrane of Graphene, its refractive index
It is 1.848.
Gas concentration many reference amounts the most according to claim 1 detection device, it is characterised in that: during described wideband light source uses
The DL-CS5014A superradiance wideband light source SLD of the long 1550nm of cardiac wave, bandwidth 40nm.
Gas concentration many reference amounts the most according to claim 1 detection device, it is characterised in that: described spectroanalysis instrument is
The Agilent 86140B spectroanalysis instrument of 600～1700nm wave-length coverages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610593814.XA CN106198409B (en) | 2016-07-26 | 2016-07-26 | A kind of gas concentration many reference amounts detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610593814.XA CN106198409B (en) | 2016-07-26 | 2016-07-26 | A kind of gas concentration many reference amounts detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106198409A true CN106198409A (en) | 2016-12-07 |
| CN106198409B CN106198409B (en) | 2018-08-21 |
Family
ID=57495200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610593814.XA Active CN106198409B (en) | 2016-07-26 | 2016-07-26 | A kind of gas concentration many reference amounts detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106198409B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222813A (en) * | 2014-06-30 | 2016-01-06 | 洛克威尔自动控制技术股份有限公司 | For the coil framework of induction pick-up |
| CN109341735A (en) * | 2018-12-10 | 2019-02-15 | 山东省科学院激光研究所 | A kind of monitoring device and method |
| CN111812060A (en) * | 2020-06-19 | 2020-10-23 | 中国矿业大学 | Methane concentration detection system |
| CN114136923A (en) * | 2021-11-29 | 2022-03-04 | 华北电力大学 | Online measurement system for dissolved methane in transformer oil |
| CN117147795A (en) * | 2023-10-30 | 2023-12-01 | 中国石油天然气股份有限公司 | Oil gas concentration data monitoring device of filling station |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183485A (en) * | 2010-12-17 | 2011-09-14 | 重庆大学 | Methane sensing device based on long-period fiber grating |
| CN104568841A (en) * | 2014-12-18 | 2015-04-29 | 重庆大学 | Photonic crystal optical fiber methane sensing device based on modular interference |
| CN105115939A (en) * | 2015-07-28 | 2015-12-02 | 重庆大学 | Tapered multimode interference-based high-sensitivity optical fiber methane sensing device |
| EP2963413A1 (en) * | 2014-06-30 | 2016-01-06 | Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO | Methane gas sensor array and method |
| CN105372208A (en) * | 2015-10-20 | 2016-03-02 | 沈阳师范大学 | Photonic crystal fiber methane sensor based on sensitive film coating |
-
2016
- 2016-07-26 CN CN201610593814.XA patent/CN106198409B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183485A (en) * | 2010-12-17 | 2011-09-14 | 重庆大学 | Methane sensing device based on long-period fiber grating |
| EP2963413A1 (en) * | 2014-06-30 | 2016-01-06 | Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO | Methane gas sensor array and method |
| CN104568841A (en) * | 2014-12-18 | 2015-04-29 | 重庆大学 | Photonic crystal optical fiber methane sensing device based on modular interference |
| CN105115939A (en) * | 2015-07-28 | 2015-12-02 | 重庆大学 | Tapered multimode interference-based high-sensitivity optical fiber methane sensing device |
| CN105372208A (en) * | 2015-10-20 | 2016-03-02 | 沈阳师范大学 | Photonic crystal fiber methane sensor based on sensitive film coating |
Non-Patent Citations (2)
| Title |
|---|
| JIANCHUN YANG，ET.AL.: "Sensitivity enhancing of transition mode long-period fiber grating asmethane sensor using high refractive indexpolycarbonate/cryptophane A overlay deposition", 《SENSORS AND ACTUATORS B: CHEMICAL》 * |
| YANQI SHI，ET.AL.: "Efficient Encapsulation of Chloroform with Cryptophane-M and the Formation of Exciplex Studied by Fluorescence Spectroscopy", 《JOURNAL OF FLUORESCENCE》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222813A (en) * | 2014-06-30 | 2016-01-06 | 洛克威尔自动控制技术股份有限公司 | For the coil framework of induction pick-up |
| CN109341735A (en) * | 2018-12-10 | 2019-02-15 | 山东省科学院激光研究所 | A kind of monitoring device and method |
| CN109341735B (en) * | 2018-12-10 | 2021-08-20 | 山东省科学院激光研究所 | Monitoring device and method |
| CN111812060A (en) * | 2020-06-19 | 2020-10-23 | 中国矿业大学 | Methane concentration detection system |
| CN114136923A (en) * | 2021-11-29 | 2022-03-04 | 华北电力大学 | Online measurement system for dissolved methane in transformer oil |
| CN117147795A (en) * | 2023-10-30 | 2023-12-01 | 中国石油天然气股份有限公司 | Oil gas concentration data monitoring device of filling station |
| CN117147795B (en) * | 2023-10-30 | 2024-01-05 | 中国石油天然气股份有限公司 | Oil gas concentration data monitoring device of filling station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106198409B (en) | 2018-08-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106198409B (en) | A kind of gas concentration many reference amounts detection device | |
| Khan et al. | A review of optical interferometry techniques for VOC detection | |
| CN102183485B (en) | Methane sensing device based on long-period fiber grating | |
| CN104568841B (en) | Photonic crystal optical fiber methane sensing device based on modular interference | |
| CN101545860B (en) | Sensing system with fiber gas sensor | |
| Yeo et al. | Fibre-optic sensor technologies for humidity and moisture measurement | |
| Echeverría et al. | Effects of the porous texture and surface chemistry of silica xerogels on the sensitivity of fiber-optic sensors toward VOCs | |
| CN105115939A (en) | Tapered multimode interference-based high-sensitivity optical fiber methane sensing device | |
| DE102011052233A1 (en) | Fiberoptic carbon dioxide purity sensor assembly and system | |
| Echeverría et al. | A fiber-optic sensor to detect volatile organic compounds based on a porous silica xerogel film | |
| US20160299083A1 (en) | Gas sensor | |
| Pawar et al. | ZnO coated Fabry-Perot interferometric optical fiber for detection of gasoline blend vapors: Refractive index and fringe visibility manipulation studies | |
| CN106769897A (en) | PCF LPG CH_4 detections devices and sensor production method | |
| Deng et al. | Trace hydrogen sulfide gas sensor based on tungsten sulfide membrane-coated thin-core fiber modal interferometer | |
| CN105044033B (en) | A kind of intensity demodulation type optical fiber gas sensing device and its method for sensing | |
| CN102661933A (en) | Wet steam dryness measuring device and measuring method based on surface plasma resonance | |
| CN101871879A (en) | Trace gas detection method based on micro resonance loop array spectrum-dividing technology and detector | |
| Bui et al. | Novel method of dual fiber Bragg gratings integrated in fiber ring laser for biochemical sensors | |
| Tanji et al. | Nanoporous Fluorescent Microresonators for Non-wired Sensing of Volatile Organic Compounds down to the ppb Level | |
| Consales et al. | Chemical detection in water by single-walled carbon nanotubes-based optical fiber sensors | |
| EP2668478A1 (en) | Method of absorbance correction in a spectroscopic heating value sensor | |
| KR102106091B1 (en) | Optical-circuit type device for detecting reformulated fuel and method for manufacturing sensor element thereof | |
| Komanec et al. | Structurally-modified tapered optical fiber sensors for long-term detection of liquids | |
| Debliquy et al. | Review of the use of the optical fibers for safety applications in tunnels and car parks: pollution monitoring, fire and explosive gas detection | |
| Zhu et al. | Optical fiber methane sensor based on SAN film containing cryptophane-E-(OEt) 6 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210104 Address after: 402460 station No.14, no.6, 10th floor, innovation and development center, No.19 Lingfang Avenue, Changzhou street, Rongchang District, Chongqing Patentee after: Chongqing kezhiyuan Technology Co.,Ltd. Address before: 400044 No. 174 Sha Jie street, Shapingba District, Chongqing Patentee before: Chongqing University |