CN110426352A - The novel thin film hydrogen gas sensor of smart phone monitoring - Google Patents
The novel thin film hydrogen gas sensor of smart phone monitoring Download PDFInfo
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- CN110426352A CN110426352A CN201910771898.5A CN201910771898A CN110426352A CN 110426352 A CN110426352 A CN 110426352A CN 201910771898 A CN201910771898 A CN 201910771898A CN 110426352 A CN110426352 A CN 110426352A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
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Abstract
A kind of novel thin film hydrogen gas sensor of smart phone monitoring frivolous, reliable, that instant analysis can be carried out to density of hydrogen in ambient enviroment, the system are made of smart phone, grating, optical fiber, fiber coupler, titania nanotube structure and plastic shell etc..Use the flashlight of mobile phone as light source incidence fiber end face, be irradiated on the titania nanotube of exposure in the environment, is received after its reflection by mobile phone camera.Mobile phone terminal can be handled the image captured by software, obtain the spectrum under different hydrogen concentration, carry out Concentration Testing to the hydrogen in environment according to spectroscopic data.Whole system does not need external power supply or light source, and test speed is fast and can carry out Concentration Testing to hydrogen within the scope of entire white-light spectrum.The present invention measures immediately in the portable high-accuracy concentration to hydrogen important application value, has important application prospect in terms of hydrogen as energy source technical industry.
Description
Technical field
The invention belongs to optics and materials science field, are related to titania nanotube structure and image processing method, mention
The design scheme for having gone out a kind of small in size, light weight, the sensor of density of hydrogen in environment capable of being detected immediately.
Background technique
Thin film optical filters sensor becomes because of the features such as its is small in size, fast response time, precision are good, loss is low, stability is strong
The focus of current many focus of attention, thin film optical filters sensor performance depend primarily on sensitive thin film, keep sensor easier to control,
It is easily modified.With the fast development of smart phone, also more and more prominent, intelligence the features such as high integration, intelligence and convenience
Energy mobile phone is cleverly applied in various fields.With being continuously increased to the integrated and intelligent demand of fibre optical sensor,
The research of fiber sensor measuring based on smart phone has begun the concern for causing people.Such as use smart phone camera
The measurement of Fiber Optic Sensor Based on Surface Plasmon Resonance system is realized with flash lamp.Fibre optical sensor and smart phone are closely tied
Close, preferably expanded the potential application field of sensor, for thin film optical filters sensor provide one it is simple, intelligently, it is low at
This platform, so that the future development for thin film optical filters sensor creates more spaces.A kind of shape of the Hydrogen Energy as the energy
State, because its availability and using upper cleaning, it is convenient the features such as, to adjustment energy consumption structure, reduce greenhouse gas emission,
The important in inhibiting such as climate change are coped with, there is huge development space in terms of Hydrogen Technology and industry.Hydrogen is inflammable, explosive
The characteristics of so that high speed monitor device is become one of requisite instrumentation in Hydrogen Energy use.
We devise a kind of novel thin film hydrogen gas sensor of smart phone monitoring, wherein titania nanotube structure
In conjunction with the tip of optical fiber, the flashlight and camera of smart phone are used as light source and spectrum analyzer.This method passes optical fiber
Sensor is combined with smart phone, make full use of smart phone itself reduce measurement needed for various equipment, can be further
Development is integrated intelligent hydrogen gas sensor.
Summary of the invention
The small in size, light weight of one kind that is itd is proposed the invention aims to detect density of hydrogen in environment, can be instant
The portable intelligent mobile phone hydrogen gas sensor of detection.
When Nano tube array of titanium dioxide in air when, oxygen can be adsorbed on the surface of titania nanotube
When material is to hydrogen, with the negative oxygen ion for being adsorbed on surface redox reaction can occur for hydrogen
Titania nanotube body structure surface has liquid water appearance, to influence its reflectance spectrum.The hand of smart phone
Torch is irradiated in titania nanotube structure as light source to be reflected, and reflected light passes through mobile phone camera after grating beam splitting
Machine record and later image processing technique, when density of hydrogen changes in ambient enviroment, the RGB image presented on grating passes through
The camera of smart phone is shot, and the RGB image of capture is converted to gray level image by standard Matlab function, can be obtained corresponding
Gray-scale intensity spread-spectrum.The spectrum can be considered reflectance spectrum, then filter to the spectrum, smoother anti-to obtain
Penetrate spectrum.The spectroscopic datas such as the offset by measurement peak value, we can demarcate the concentration of hydrogen in environment, Jin Ershi
Now to the accurate instant detection of density of hydrogen in environment.This method provides not only analysis platform conveniently, inexpensive, intelligent,
And by reducing fibre diameter, improve the means such as resolution of video camera, also can be further improved sensor sensitivity and
Precision.
The advantages and positive effects of the present invention:
Since the present apparatus has carried out whole design to sensor using smart phone and optical fiber, so the volume of this sensor
It is smaller, the closer situation of the distance between incidence hole and the light hole of all kinds of mainstream mobile phones is considered in design process simultaneously.It will
Sensor, which is directly exposed in environment, directly to be detected density of hydrogen, and external power supply and light source are not needed.Due to making
Light is regulated and controled with the structure of micro/nano-scale, so equipment overall quality is smaller, and easy to carry.At the image of this sensor
Reason system utilizes computer program, rather than traditional photodetector entirely designs no external circuits, avoids by circuit
The inaccuracy of luminous intensity measurement caused by the precision of middle electricity component and the fluctuation of electric current, improves the reliability of system, does not need volume
Outer electricity hardware, processing speed is very fast, and the spectral manipulation time is also saved while reducing system cost.
The novel thin film hydrogen gas sensor of smart phone monitoring of the invention, it can be achieved that in environment density of hydrogen instant inspection
It surveys, while having the advantages that small in size, integrated, intelligent, at low cost and producing in enormous quantities, have emphatically in Hydrogen Technology industry
The application value and prospect wanted.
Detailed description of the invention
Fig. 1 is the schematic diagram of the novel thin film hydrogen gas sensor of smart phone monitoring, in which: (a) is smart phone monitoring
Novel thin film hydrogen gas sensor entirety schematic diagram；(b) be smart phone monitoring novel thin film hydrogen gas sensor in optical fiber
The design diagram at the acrylic bottom of optical fiber is connect and protected with optical detection apparatus.
Fig. 2 is the schematic diagram of the novel thin film hydrogen gas sensor of smart phone monitoring.
Fig. 3 is the program flow diagram for the treatment of process.
Specific embodiment
Embodiments of the present invention are described in detail with reference to the accompanying drawing.
(1) it is designed and is made according to smart phone model and fiber size and is connect with optical detection apparatus for optical fiber
The substrate of acryhic material, as shown in Fig. 1 (b), acrylic bottom includes fiber grooves, pedestal and circular arc interface, and when use is viscous
It is attached in front of flashlight and camera.
(2) it is designed and is made outside the plastics for connecting fiber end face and titania nanotube structure according to fiber size
Shell.
(3) a variety of processing conditions are taken to prepare titania nanotube structure using anodizing, key step is as follows:
A) it by size that the plastic shell that high-purity titanium foil (99%) is cut into and designs and produces matches and presses first
Flat processing, drying for standby after being then individually placed to acetone, dehydrated alcohol by sample, be respectively cleaned by ultrasonic 15min in deionized water.In advance
Treated the bright and clean no dirt of sample surfaces.
B) using the ethylene glycol solution of fluorine ion is contained as electrolyte, wherein NH4The mass fraction of F be 5wt%, go from
The mass fraction of sub- water is 3wt%.
C) electrolytic process carries out at room temperature, and experimental system is using 250ml beaker as reaction vessel, DC voltage stabilization and current stabilization electricity
Source power supply, anode connect pretreated pure titanium sheet, cathode connect with platinum plate electrode similar in titanium sheet area, two electrodes are opposite, control
The distance between two electrodes, open magnetic stirring apparatus and are stirred, and change decomposition voltage respectively and electrolysis time preparation is not same
Product.
D) sample after being electrolysed is being cleaned by ultrasonic 3min and drying for standby in acetone and deionized water respectively.
(4) it is used as the diffraction grating in system with 1200 lines/rice transmission diffraction grating, before being placed in mobile phone camera
Side.Two fiber optic tips obtain 45 ° of sections by polishing, using the acrylic bottom of production by fiber end face respectively at flashlight
It is connected with camera and fixes optical fiber.
(5) after two optical fiber being connected with flashlight and camera pass through the same fiber coupler, pass through the modeling of production
Expect shell in conjunction with titania nanotube structure.
(6) fiber end face that titania nanotube structure will be present exposes in the hydrogen gas atmosphere, when density of hydrogen changes
When, the RGB image presented on grating can be shot by the camera of smart phone.By using standard Matlab function by RGB
Image is converted to gray level image.Since the light of sensor is dispersed into line spectrum by diffraction grating, obtained gray level image can be with
It is interpreted sensor spectrum, then filters to the spectrum, obtains smoother reflectance spectrum.
(7) reflected spectrum data obtained under different hydrogen concentration is compared and analyzed, to different density of hydrogen into
Row calibration.
(8) repeat to test using the titania nanotube structure under different preparation conditions, compare different titanium dioxides
The best titanium dioxide of resultant effect is chosen in influence of the titanium nano tube structure to transducer sensitivity, detection range and reaction speed
Titanium nano tube structure.
Claims (6)
1. the novel thin film hydrogen gas sensor of smart phone monitoring, it is characterised in that the special material sensitive to density of hydrogen and biography
The integrally-built integrated design of sensor.
2. the novel thin film hydrogen gas sensor of smart phone monitoring according to claim 1, has selected large specific surface area, work
Titania nanotube structure more than property site, hydrogen generate liquid water in conjunction with the oxonium ion on titania nanotube surface,
Analysis detection is carried out to density of hydrogen according to obtained reflected spectrum data.
3. titania nanotube structure according to claim 2 selects anodizing to carry out preparation processing.
4. the overall structure of the novel thin film hydrogen gas sensor of smart phone monitoring according to claim 1, including photograph
Machine connects, flashlight interface, fiber coupler and titania nanotube structure.
5. the overall structure of the novel thin film hydrogen gas sensor of smart phone monitoring according to claim 4, devises third
The substrate of olefin(e) acid material is for connecting optical fiber and camera and flashlight.
6. the overall structure of the novel thin film hydrogen gas sensor of smart phone monitoring according to claim 4, devises modeling
Expect that shell is used for the combination of titania nanotube structure and fiber end face.
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| CN201910771898.5A CN110426352A (en) | 2019-08-21 | 2019-08-21 | The novel thin film hydrogen gas sensor of smart phone monitoring |
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| CN201910771898.5A CN110426352A (en) | 2019-08-21 | 2019-08-21 | The novel thin film hydrogen gas sensor of smart phone monitoring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116058828A (en) * | 2022-12-19 | 2023-05-05 | 北京师范大学珠海校区 | Sport health monitoring device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012096965A (en) * | 2010-11-02 | 2012-05-24 | Toyohashi Univ Of Technology | Porous titanium oxide, hydrogen detector, methods for producing them, hydrogen sensor and photoelectric conversion element |
| CN103175807A (en) * | 2013-02-18 | 2013-06-26 | 南京大学 | Reflection-type all-fiber hydrogen sensor and preparation and measurement method thereof |
| CN104391013A (en) * | 2014-10-30 | 2015-03-04 | 中国电子科技集团公司第四十八研究所 | Nitrogen-doped titanium dioxide nanotube hydrogen sensor and preparation method thereof |
| CN107064017A (en) * | 2017-04-24 | 2017-08-18 | 南开大学 | Portable intelligent mobile phone spectrum detection device |
-
2019
- 2019-08-21 CN CN201910771898.5A patent/CN110426352A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012096965A (en) * | 2010-11-02 | 2012-05-24 | Toyohashi Univ Of Technology | Porous titanium oxide, hydrogen detector, methods for producing them, hydrogen sensor and photoelectric conversion element |
| CN103175807A (en) * | 2013-02-18 | 2013-06-26 | 南京大学 | Reflection-type all-fiber hydrogen sensor and preparation and measurement method thereof |
| CN104391013A (en) * | 2014-10-30 | 2015-03-04 | 中国电子科技集团公司第四十八研究所 | Nitrogen-doped titanium dioxide nanotube hydrogen sensor and preparation method thereof |
| CN107064017A (en) * | 2017-04-24 | 2017-08-18 | 南开大学 | Portable intelligent mobile phone spectrum detection device |
Non-Patent Citations (1)
| Title |
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| 吴涛: "Pd纳米环/TiO_2纳米管复合结构氢传感器的制备及其工艺优化研究", 《工程科技I辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116058828A (en) * | 2022-12-19 | 2023-05-05 | 北京师范大学珠海校区 | Sport health monitoring device |
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