CN108717053A - A kind of hydrogen gas sensor - Google Patents
A kind of hydrogen gas sensor Download PDFInfo
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- CN108717053A CN108717053A CN201810607406.4A CN201810607406A CN108717053A CN 108717053 A CN108717053 A CN 108717053A CN 201810607406 A CN201810607406 A CN 201810607406A CN 108717053 A CN108717053 A CN 108717053A
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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
- G01N21/55—Specular reflectivity
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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
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
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Abstract
The present invention relates to a kind of hydrogen gas sensors, pass through the under test gas to being blown from into, oxidizing fire is carried out to obtain current under test gas concentration index, the sensor allows user that can become apparent from the concentration levels for sucking under test gas, to determine current practical action；By forming protective film between the substrate and film layer of test device, the moisture or oxygen that can prevent substrate from being absorbed etc. are impregnated with the film layer.By forming protective film on the surface of catalyst layer, it can prevent catalyst layer from absorbing moisture or oxygen in environment etc..Thus, it is possible to prevent the deterioration of film layer and catalyst layer.
Description
Technical field
The present invention relates to sensor field more particularly to a kind of hydrogen gas sensors.
Background technology
Hydrogen due to its high combustion efficiency, product is pollution-free the advantages that, be collectively known as three big new energy with solar energy, nuclear energy
Source.As a kind of new energy, hydrogen is widely used in fields such as aviation, power；Meanwhile hydrogen is as a kind of reproducibility
Gas and carrier gas especially have particularly important application valence in chemical industry, electronics, medical treatment, metal smelt in military and national defense field
Value.But hydrogen molecule very little easily leaks during production, storage, transport and use, since hydrogen is unfavorable for breathing, nothing
Color is tasteless, cannot be realized by people's nose, and ignition point is only 585 DEG C, and content is met in 4%~75% range under test gas
Open fire explodes, thus in the use of hydrogen must using hydrogen gas sensor to environment in the content of hydrogen be detected simultaneously
It is leaked and is monitored.
Hydrogen is concerned as the energy that can inhibit discharge carbon dioxide.But hydrogen is into environment (such as using
In the environment such as the underground parking of the automobile of hydrogen fuel cell or hydrogen station) when having leakage, then the hydrogen leaked is possible to quick-fried
It is fried.Therefore, it is necessary to quickly detect the leakage of hydrogen and prevent its leakage.As the hydrogen sensor for detecting the leakage hydrogen, make
Semiconductor transducer with tin oxide is used.
But the semiconductor transducer, which is not heated to 400 degree Celsius or so, cannot detect hydrogen.It is therefore desirable to have with
The explosion-proof countermeasure for leaking hydrogen of heating, its is complicated for the device of the hydrogen as detection leakage, incurs cost increase.
Then, as the hydrogen sensor that need not heat and not need explosion-proof countermeasure, there is such hydrogen sensing shown in Fig. 1
Device is by the motion of Japanese Laid-Open 2005-83832 bulletins (hereinafter referred to as patent document 1) institute.As shown in Figure 1, the hydrogen sensor
10 form film layer 12 in the surface 11a of the substrates 11 such as resin (such as vinylite piece) or glass.Further in the film
The surface 12a of layer 12 forms catalyst layer 13, when the contact of the catalyst layer 13 and the hydrogen of leakage, is then made by its catalyst
With and so that film layer 12 is promptly carried out hydrogenization, therefrom film layer 12 light reflectivity variation.But undeniably having
There is the surface 11a of the substrates such as hygroscopic resin 11 to form in the hydrogen sensor 10 of film layer 12, it is contained by substrate 11 or
The case where moisture and oxygen that substrate 11 is absorbed from environment etc. are impregnated with film layer 12 and film layer 12 are made to aoxidize and deteriorate.If film
Layer 12 generates this deterioration, then has the problem of bringing obstacle to the hydrogen of rapid detection leakage.Even if few using hygroscopicity
Glass substrate 11 can not be said completely without hygroscopicity, so above-mentioned film layer 12 will appear deterioration.In addition, catalyst layer 13
Absorbing moisture and oxygen in environment etc., then catalyst layer 13 deteriorates, and catalyst action reduces, when moisture and oxygen etc. are impregnated into turn
Then film layer 12 deteriorates film layer 12.It is possible to detecting rapidly due to the deterioration of this catalyst layer 13 or film layer 12
Obstacle is generated in the hydrogen of leakage.
Invention content
For the above problem of the prior art, the object of the present invention is to provide a kind of hydrogen gas sensors.
In order to solve the above-mentioned technical problem, technical scheme is as follows：
A kind of hydrogen gas sensor, including shell, motor, fan blade and analytical equipment, the motor and fan blade are contained in described
Shell；The motor converts electrical energy into mechanical energy to drive fan blade rotation with described in being sent under test gas after powered up
Analytical equipment is to obtain object gas to be detected；
The analytical equipment passes through：Film layer is formed on the surface of the substrates such as glass or resin, further in the film layer
Surface form catalyst layer, when the catalyst layer is contacted with the hydrogen of leakage, keep film layer fast by its catalyst action
Hydrogenization is carried out fastly, and the light reflectivity of film layer is made to change to test the concentration of hydrogen.
The analytical equipment includes gas absorption vessel, test device, analysis element；It can be by hydrogen after the fan blade rotation
The gas absorption vessel is blown into obtain object gas to be detected；Object gas enters combustion chambers burn, the analysis elements
Temperature rise, the intrinsic frequency that part measures crystallization plates change to be measured to density of hydrogen.
The film layer that is formed on the substrate of the test device, the surface for being formed in the film layer and using containing in environment
Hydrogen so that the film layer is carried out hydrogenization and the catalyst layer that makes the light reflectivity of the film layer change, have only
Between the substrate and the film layer or between the substrate and the film layer and the catalyst layer not with
The protective film that the surface of the side of the thin film layer is formed.
Protective film is formed between substrate and film layer, the moisture or oxygen that can prevent substrate from being absorbed etc. are impregnated with the film
Layer.By forming protective film on the surface of catalyst layer, it can prevent catalyst layer from absorbing moisture or oxygen in environment etc..From
And the deterioration of film layer and catalyst layer can be prevented.
Since the deterioration of film layer and catalyst layer can be prevented, so can maintain appropriately to detect the hydrogen leaked for a long time
Such hydrogen detection performance.
The film layer can also be magnesium-nickel alloy film layer or magnesium film layer.By the way that the film layer of hydrogen sensor is set
At magnesium-nickel alloy film layer or magnesium film layer, the film that its light reflectivity changes if the hydrogen for touching leakage can be formed
Layer.Further, the catalyst layer can also be formed by palladium or platinum.By the way that catalyst layer is formed by palladium or platinum, then can
Film layer is set to carry out hydrogenization using its catalyst action.
Further, the thickness of catalyst layer can also be 1nm to 100nm；When thickness is the catalyst of 1nm to 100nm
When layer and the hydrogen of leakage contact, film layer hastily carries out hydrogenization.
Further, the sensor further includes display element, the analysis element by the result after analysis be sent to
The display element is simultaneously shown by the display element.
Further, the result after analysis is transmitted to visualization device and is shown by visualization device by the analysis element.
Further, the sensor is equipped with filter screen under test gas delivery end, and the filter screen will be under test gas
Pollution particulate matter filter out come effective eliminating particle under test gas pollutant.
Beneficial effects of the present invention are：
1) sensor of the application carries out oxidizing fire to obtain current gas to be measured to the under test gas being blown from into
Bulk concentration index, the sensor allows user that can become apparent from the concentration levels for sucking under test gas, to determine current reality
Action.
2) by forming protective film between the substrate and film layer of test device, the moisture that can prevent substrate from being absorbed
Or oxygen etc. is impregnated with the film layer.By forming protective film on the surface of catalyst layer, it can prevent catalyst layer from absorbing environment
In moisture or oxygen etc..Thus, it is possible to prevent the deterioration of film layer and catalyst layer.
Description of the drawings
It, below will be to required in embodiment or description of the prior art in order to illustrate more clearly of technical scheme of the present invention
The attached drawing used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, right
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Its attached drawing.
Fig. 1 is the fundamental diagram of the sensor of one embodiment of the present invention.
Specific implementation mode
Technical scheme in the embodiment of the invention is clearly and completely described below in conjunction with the accompanying drawings, it is clear that described
Embodiment be only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ability
The every other embodiment that domain those of ordinary skill is obtained without making creative work, belongs to the present invention
The range of protection.
As shown in Figure 1, the present invention provides a kind of sensor, sensor includes shell, motor, fan blade and analytical equipment.Shell
Body is generally rectangular shaped.Motor and fan blade are set to the lower part of shell, and relatively, analytical equipment is set to the top of shell.Shell
It is equipped with the receiving space of receiving motor and fan blade.Analytical equipment includes gas absorption vessel, burner, analysis element；Institute
Hydrogen can be blown into the gas absorption vessel to obtain object gas to be detected after stating fan blade rotation；Object gas enters combustion
Room burning is burnt, temperature rise, the intrinsic frequency that the analysis element measures crystallization plates change to be surveyed to density of hydrogen
Amount.
Motor converts electrical energy into mechanical energy after powered up, is used to that fan blade to be driven to rotate.It can will be to be measured after fan blade rotation
Gas is blown into gas absorption vessel to obtain object gas to be detected.Gas absorption vessel is one and half be located at beside fan blade
Closed oblong channel which is provided with the rectangular air admission hole that gas absorption vessel is sent under test gas.It is to be appreciated that gas
Body absorbs container and is additionally provided with the venthole analytical equipment being correspondingly arranged with air admission hole based on the tunable semiconductor laser absorption
Spectral technique analyzes object gas to obtain under test gas concentration index.
Temperature rise, the intrinsic frequency that analysis element measures crystallization plates change to be measured to density of hydrogen.
Result after analysis is sent to display element and is shown by display element by analysis element, makes user more clear
Chu sucks the concentration levels of under test gas, to determine current practical action.In other real-time modes, analysis element can be with
It is transmitted on visualization device such as mobile phone when synchronous fructufy by after analysis and is shown by visualization device, seen in real time for user
It examines.
Gas absorption vessel is provided with air admission hole and venthole, and the logical of under test gas flowing can be formed in sensor
Road so that while the under test gas concentration index detection that the sensor is stated in realization, moreover it is possible to reach the mesh taken a breath in real time
's.
The test device, which is provided with, to be formed on the surface 11a of the substrates such as acrylic resin, polythene strip by two
The first protective film that silica (SiO2) is constituted forms the film being made of magnesium-nickel alloy or magnesium on the surface of the first protective film
Layer.And the catalyst layer being made of palladium or platinum is formed on the surface of film layer, it is formed by dioxy on the surface of catalyst layer
The second protective film that SiClx is constituted.In this way, hydrogen sensor forms film layer on a surface of a substrate via the first protective film, and
The second protective film is formed on the surface of catalyst layer.Hydrogen sensor with this structure by the first protective film due to then being prevented
Substrate absorbs moisture and oxygen etc. and is impregnated with to film layer, and prevents moisture and oxygen in environment etc. to be catalyzed by the second protective film
Oxidant layer absorbs.As a result, the deterioration of film and catalyst layer is prevented from.
Above description has fully disclosed the specific implementation mode of the present invention.It should be pointed out that being familiar with the field
Technical staff is to any change for being done of specific implementation mode of the present invention all without departing from the range of claims of the present invention.
Correspondingly, the scope of the claims of the invention is also not limited only to previous embodiment.
Claims (8)
1. a kind of hydrogen gas sensor, including shell, motor, fan blade and analytical equipment, it is characterised in that：
The motor and fan blade are contained in the shell；It is described to drive that the motor converts electrical energy into mechanical energy after powered up
Fan blade is rotated so that under test gas is sent into the analytical equipment to obtain object gas to be detected；The analytical equipment by
The surface of the substrates such as glass or resin forms film layer, further catalyst layer is formed on the surface of the film layer, when the catalysis
Oxidant layer is contacted with the hydrogen of leakage, so that film layer is promptly carried out hydrogenization by its catalyst action, and make film layer
Light reflectivity change and test the concentration of hydrogen.
2. hydrogen gas sensor according to claim 1, which is characterized in that institute's analytical equipment includes that gas absorbs appearance
Device, test device, analysis element；It is to be detected to obtain can hydrogen to be blown into the gas absorption vessel after the fan blade rotation
Object gas；Object gas enters combustion chambers burn, and the analysis element measures the temperature rise of crystallization plates, intrinsic frequency occurs
Change to be measured to density of hydrogen.
3. hydrogen gas sensor according to claim 2, which is characterized in that the film formed on the substrate of the test device
Layer, the surface for being formed in the film layer and so that the film layer is carried out hydrogenization using the hydrogen contained in environment and make described
The catalyst layer of the light reflectivity variation of film layer, has only between the substrate and the film layer or in the base
Between plate and the film layer and the catalyst layer not with the surface of the side of the thin film layer formed protection
Film.
4. hydrogen gas sensor according to claim 2, which is characterized in that the film layer is magnesium-nickel alloy film layer or magnesium
Film layer；The catalyst layer can also be formed by palladium or platinum.
5. hydrogen gas sensor according to claim 4, which is characterized in that the thickness of the catalyst layer can also be 1nm
To 100nm.
6. hydrogen gas sensor according to claim 1, which is characterized in that the sensor further includes display element, described
Result after analysis is sent to the display element and is shown by the display element by analysis element.
7. hydrogen gas sensor according to claim 1, which is characterized in that the analysis element transmits the result after analysis
It is shown to visualization device by visualization device.
8. hydrogen gas sensor according to claim 1, which is characterized in that the sensor is equipped under test gas delivery end
Filter screen, the filter screen, which filters out the pollution particulate matter under test gas, carrys out effective eliminating particle under test gas pollutant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810607406.4A CN108717053A (en) | 2018-06-13 | 2018-06-13 | A kind of hydrogen gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810607406.4A CN108717053A (en) | 2018-06-13 | 2018-06-13 | A kind of hydrogen gas sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108717053A true CN108717053A (en) | 2018-10-30 |
Family
ID=63912991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810607406.4A Pending CN108717053A (en) | 2018-06-13 | 2018-06-13 | A kind of hydrogen gas sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108717053A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101449147A (en) * | 2006-03-20 | 2009-06-03 | 株式会社渥美精机 | Hydrogen sensor |
| CN101542274A (en) * | 2006-11-22 | 2009-09-23 | 株式会社渥美精机 | Hydrogen sensor and hydrogen gas detector |
| CN107991210A (en) * | 2017-11-24 | 2018-05-04 | 深圳市昂茂科技有限公司 | Sensor |
| CN108027333A (en) * | 2015-09-16 | 2018-05-11 | Koa株式会社 | Hydrogen sensor |
-
2018
- 2018-06-13 CN CN201810607406.4A patent/CN108717053A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101449147A (en) * | 2006-03-20 | 2009-06-03 | 株式会社渥美精机 | Hydrogen sensor |
| CN101542274A (en) * | 2006-11-22 | 2009-09-23 | 株式会社渥美精机 | Hydrogen sensor and hydrogen gas detector |
| CN108027333A (en) * | 2015-09-16 | 2018-05-11 | Koa株式会社 | Hydrogen sensor |
| CN107991210A (en) * | 2017-11-24 | 2018-05-04 | 深圳市昂茂科技有限公司 | Sensor |
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Application publication date: 20181030 |