CN107340321A - A kind of vehicle-mounted gas detection means - Google Patents
A kind of vehicle-mounted gas detection means Download PDFInfo
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- CN107340321A CN107340321A CN201710634369.1A CN201710634369A CN107340321A CN 107340321 A CN107340321 A CN 107340321A CN 201710634369 A CN201710634369 A CN 201710634369A CN 107340321 A CN107340321 A CN 107340321A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
- G01N27/127—Composition of the body, e.g. the composition of its sensitive layer comprising nanoparticles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/01—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
- B60R25/08—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on brakes or brake systems
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
Abstract
The present invention relates to a kind of vehicle-mounted gas detection means, the vehicle-mounted gas detection means includes housing, air vent is surrounded by housing, alcohol gas sensor, microprocessor, motor braking circuit and alarm module are provided with enclosure interior, the alcohol gas sensor is connected to the input of microprocessor, the output end of the microprocessor connects motor braking circuit and alarm module respectively, and motor braking circuit is connected to Vehicle Controller by wireless communication apparatus；Described alcohol gas sensor, the alumina ceramic tube, the sensitive material coated in ceramic pipe surface, the nichrome heating coil through earthenware that 2 parallel and discrete annular gold electrodes are come with by outer surface are formed, and two platinum filament pins are connected with each gold electrode；The sensitive material is ZnO composite nano fibers prepared by method of electrostatic spinning, and the ZnO composite nano-fiber materials are specially ZnO microsphere doping metals nano wire and Al.
Description
Technical field
The present invention relates to car kits technical field, more particularly to a kind of vehicle-mounted gas detection means.
Background technology
In recent years, as the decline of air quality, people's environmental consciousness gradually increase, and have to the harmfulness of pernicious gas
More understandings.The increase of car ownership, environment inside car problem also turn into emphasis of concern.Automobile is running over journey
In, tail gas can discharge substantial amounts of toxic and harmful gas, and they can enter the in-car of relative closure from number of ways and pollute car
Interior environment.In-car narrow space, people stop for a long time, inevitably result in various diseases and produce.While vehicle is in the sun
After being exposed to the sun, a large amount of noxious materials of the volatilization such as vehicle seat, such as benzene, formaldehyde, dimethylbenzene, the health of people also threaten.Drunk driving is
The problem of remaining incessant after repeated prohibition in recent years, it is annual that substantial amounts of automobile safety accident still can occur.
The detection process of in-car air quality detection means is more complicated at this stage, needs manual operations mostly, can not be certainly
It is dynamic to be detected., can not be to in-car overall air matter also, common detection means can only detect the exceeded situation of single gas
Amount makes overall merit
The content of the invention
The present invention is intended to provide a kind of vehicle-mounted gas detection means, to solve problem set forth above.
Technical scheme provides a kind of vehicle-mounted gas detection means, and the vehicle-mounted gas detection means includes shell
Body, air vent is surrounded by housing, enclosure interior be provided with alcohol gas sensor, microprocessor, motor braking circuit and
Alarm module, the alcohol gas sensor are connected to the input of microprocessor, and the output end of the microprocessor connects vapour respectively
Car braking circuit and alarm module, motor braking circuit are connected to Vehicle Controller by wireless communication apparatus；Described ethanol
Gas sensor, the alumina ceramic tube of 2 parallel and discrete annular gold electrodes is come with, coated in earthenware by outer surface
The sensitive material on surface, the nichrome heating coil through earthenware form, and being connected with two platinum filaments on each gold electrode draws
Pin；The sensitive material is ZnO composite nano fibers prepared by method of electrostatic spinning, and the ZnO composite nano-fiber materials are specially ZnO
Microballoon doping metals nano wire and Al.
The technical scheme of the offer of the present invention can include the following benefits：
The present apparatus can be realized to be detected in real time to in-car alcohol gas, when checking that concentration of alcohol is exceeded in air,
Motor braking circuit will be started, auto Not Permitted starts, and on the one hand prompts people to pay attention to in-vehicle exposure, on the other hand can protect and drive
The safety and health, the device for multiplying personnel are connected using wireless telecommunications with Vehicle Controller, reduce field wiring, structure letter
Single, easy to install, cost is cheap, stable performance.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.It should be appreciated that the general description and following detailed description of the above are only
It is exemplary and explanatory, the present invention can not be limited.
Brief description of the drawings
Using accompanying drawing, the invention will be further described, but the embodiment in accompanying drawing does not form any limit to the present invention
System, for one of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to the following drawings
Other accompanying drawings.
Fig. 1 is the systematic schematic diagram of vehicle-mounted gas detection means of the present invention.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects being described in detail in claims, of the invention.
Technical scheme is related to a kind of vehicle-mounted gas detection means, as shown in figure 1, the vehicle-mounted gas detection means
Including housing, air vent is surrounded by housing, alcohol gas sensor, microprocessor, automobile brake are provided with enclosure interior
Circuit and alarm module, alcohol gas sensor are connected to the input of microprocessor, and the output end of microprocessor connects respectively
Motor braking circuit and alarm module, motor braking circuit are connected to Vehicle Controller, microprocessor by wireless communication apparatus
Inside carries A/D change-over circuits, and the analog signal of collection is converted into data signal.
Display module is additionally provided with the housing of vehicle-mounted gas detection means of the present invention, display module is connected to microprocessor
Output end, display portion use OLED display screen, and the voltage signal that alcohol gas sensor inputs is converted into phase by microprocessor
The gas concentration answered is transferred to display module, and display is on a display screen.
In the present invention, described alarm module includes visual alarm and/or phonetic alarm, and the visual alarm is adopted
With tri coloured lantern, send the light of red, yellow, and green respectively, when for green when, illustrate the concentration of harmful gas in vehicle in critical field
It is interior, when for yellow when, illustrate harmful gas in vehicle concentration reached critical field critical value should be noted to in-car divulge information,
When for red when, illustrate that the concentration of harmful gas in vehicle is exceeded.
The course of work of vehicle-mounted gas detection means of the present invention is as follows：It is first powered on self-test and enters normal work shape by rear
State, alcohol gas sensor are acquired with fixed frequency to in-car air, and by the analog signal transmission of collection to microprocessor
Device, the A/D change-over circuits that microprocessor internal carries will transmit next analog signal and be converted into data signal, and microprocessor is to turning
The data signal changed into carries out being processed and converted to corresponding gas concentration value intuitively showing that detection means can over the display
To set the alarming value of gas concentration, when the concentration of alcohol for detecting in-car driver's cabin exceedes alarming value, automobile system will be started
Dynamic circuit, motor braking circuit are connected to Vehicle Controller by wireless telecommunications, and auto Not Permitted starts, and on the one hand prompt people's note
Meaning in-vehicle exposure, the safety and health, the device that on the other hand can protect driver and crew use wireless telecommunications and vehicle-mounted control
Device connects, and reduces field wiring, simple in construction, easy to install, cost is cheap, stable performance.
In the present invention, described alcohol gas sensor is heater-type structure, by outer surface come with 2 it is parallel and discrete
Alumina ceramic tube, the sensitive material coated in ceramic pipe surface, the nichrome through earthenware of annular gold electrode add
Heat coil is formed, and two platinum filament pins are connected with each gold electrode.
Preferably, the sensitive material is ZnO composite nano fibers prepared by method of electrostatic spinning, and the ZnO composite Nanos are fine
It is specially ZnO microsphere doping metals nano wire and Al to tie up material.
Preferably, the sensitive material thickness is 0.2~0.5mm, a diameter of 300nm of ZnO composite nano fibers.
ZnO is a kind of important semi-conducting material, its optics, electricity, catalysis etc. unique properties, there is buergerite
The n-type semiconductor material with wide forbidden band of structure, in the prior art, ZnO semi-conducting materials are in catalysis DSSC, biography
There is practical application in the fields such as sensor.In terms of gas sensor, in prior art, typically to zno-based gas sensing
The research of device mainly takes the mode such as nanostructured control, doping, compound to improve performance；And oxygen is prepared using method of electrostatic spinning
It is few as the technical scheme of sensitive material to change zinc composite fibre；In the present invention, on the sensitive material of sensor, using electrostatic
Spin processes are prepared for the composite nano fiber based on ZnO, big specific surface area and microcellular structure based on composite nano fiber, should
Sensitive material greatly increases to the response sensitivity of gas.
It is further preferred that Al mass content is 5~7% in the ZnO composite nano fibers.
In sensitive material of the present invention, ZnO is combined with Al, by doping, in Al ionic compartmentations ZnO crystal
Zn ions position, as compensation, generate a certain amount of free electron, it is dense so as to reduce the holoe carrier of material
Degree, in addition, the introducing of Al ions can suppress the growth of ZnO microsphere, significantly reduces its Microsphere Size；Meanwhile Al ions
Doping changes the distribution of oxygen component in material so that the quantity of defect oxygen and chemical absorption of surface oxygen has obtained greatly in material
Increase, above-mentioned aspect collective effect, greatly improved the sensitivity of sensor.
It is further preferred that in the ZnO composite nano fibers, the metal nanometer line is preferably Ag nano wires, the Ag
The mass content of nano wire is 6~9%, and the Ag nanowire lengths are 300nm, a diameter of 60nm.
In sensitive material of the present invention, ZnO is combined with Ag nano wires, passes through the Ag nano wires of doping so that
The Ag nano wires are parallel between each other, and the Ag nano wires can provide conductive path for sensitive material, while improve sensitive material
The intensity and toughness of material；This with prior art, typically by doping particle etc. come improve the electric conductivity of gas sensitive,
Catalytic is different, and technical scheme has realistic meaning.
In addition, the preparation process of above-mentioned sensitive material：
Step 1, take 9mmol urea and 6mmol zinc acetates to be dissolved in 40ml deionized water, stir；Then to
Al (NO are added in above-mentioned solution3)2·9H2O, stir；Ag nano wires are added into above-mentioned solution again, will after stirring
Solution is transferred in water heating kettle, the hydro-thermal reaction 20h at 130 DEG C of constant temperature, after reaction terminates, is naturally cooled to room temperature, is used successively
Alcohol and deionized water centrifuge, washing, repeated washing three times after, gained is precipitated into drying；
Step 2, take 0.7g polyvinyl alcohol to be put into the conical flask equipped with 12g distilled water, be stirred continuously in the case where being incubated 90 DEG C,
It is allowed to be completely dissolved, naturally cools to room temperature；Then above-mentioned precipitation is taken, continues to stir 6h, obtains mixed solution A；Then will be upper
State mixed solution A to be fitted into spinneret pipe, insert 10cm copper wire as positive pole, aluminium foil is negative pole as receiver board, electrostatic
Institute's making alive is 15kV during spinning, and distance is 20cm between spinning head fish receiver board, carries out electrostatic spinning, obtain polyvinyl alcohol/
ZnO/Ag/Al composite nano fibers；
Step 3, above-mentioned polyvinyl alcohol/ZnO/Ag/Al composite nano fibers are made annealing treatment into 5h at 550 DEG C, to remove
High-molecular polyivnyl alcohol, obtain ZnO composite nano fibers.
Further, after above-mentioned ZnO composite nano fibers being configured into slurry, coated in ceramic pipe surface, electrode is prepared
Afterwards, alcohol gas sensor of the present invention is produced.
Embodiment 1
In the present embodiment, described alcohol gas sensor is heater-type structure, by outer surface come with 2 it is parallel and point
Alumina ceramic tube, the sensitive material coated in ceramic pipe surface, the nichrome through earthenware of vertical annular gold electrode
Heating coil is formed, and two platinum filament pins are connected with each gold electrode；The sensitive material is ZnO prepared by method of electrostatic spinning
Composite nano fiber, thickness are 0.2~0.5mm, and, the ZnO composite nano-fiber materials are specially that ZnO microsphere doping metals are received
Rice noodles and Al.
The preparation process of above-mentioned ZnO composite nano fibers is as follows：
Step 1, take 9mmol urea and 6mmol zinc acetates to be dissolved in 40ml deionized water, stir；Then to
Al (NO are added in above-mentioned solution3)2·9H2O, stir；Ag nano wires are added into above-mentioned solution again, will after stirring
Solution is transferred in water heating kettle, the hydro-thermal reaction 20h at 130 DEG C of constant temperature, after reaction terminates, is naturally cooled to room temperature, is used successively
Alcohol and deionized water centrifuge, washing, repeated washing three times after, gained is precipitated into drying；
Step 2, take 0.7g polyvinyl alcohol to be put into the conical flask equipped with 12g distilled water, be stirred continuously in the case where being incubated 90 DEG C,
It is allowed to be completely dissolved, naturally cools to room temperature；Then above-mentioned precipitation is taken, continues to stir 6h, obtains mixed solution A；Then will be upper
State mixed solution A to be fitted into spinneret pipe, insert 10cm copper wire as positive pole, aluminium foil is negative pole as receiver board, electrostatic
Institute's making alive is 15kV during spinning, and distance is 20cm between spinning head fish receiver board, carries out electrostatic spinning, obtain polyvinyl alcohol/
ZnO/Ag/Al composite nano fibers；
Step 3, above-mentioned polyvinyl alcohol/ZnO/Ag/Al composite nano fibers are made annealing treatment into 5h at 550 DEG C, to remove
High-molecular polyivnyl alcohol, obtain ZnO composite nano fibers.
In the present embodiment, the mass content of metal nanometer line is 6% in the ZnO composite nano fibers, and the ZnO is compound
Al mass content is 5% in nanofiber.
The electric current of heating coil is flowed through to regulate and control the operating temperature of sensor by changing, and is in not by measurement sensor
Resistance value during with gas between two gold electrodes can obtain the sensitivity of sensor.Spirit of the sensor for alcohol gas
Sensitivity S is defined as：S=Rg/Ra, wherein Rg and Ra be respectively sensor in alcohol gas and air when two gold electrodes between electricity
Resistance, it is found that the sensitivity of the sensor is 8.4 in the present embodiment.
Embodiment 2
In the present embodiment, described alcohol gas sensor is heater-type structure, by outer surface come with 2 it is parallel and point
Alumina ceramic tube, the sensitive material coated in ceramic pipe surface, the nichrome through earthenware of vertical annular gold electrode
Heating coil is formed, and two platinum filament pins are connected with each gold electrode；The sensitive material is ZnO prepared by method of electrostatic spinning
Composite nano fiber, thickness are 0.2~0.5mm, and, the ZnO composite nano-fiber materials are specially that ZnO microsphere doping metals are received
Rice noodles and Al.
The preparation process of above-mentioned ZnO composite nano fibers is as follows：
Step 1, take 9mmol urea and 6mmol zinc acetates to be dissolved in 40ml deionized water, stir；Then to
Al (NO are added in above-mentioned solution3)2·9H2O, stir；Ag nano wires are added into above-mentioned solution again, will after stirring
Solution is transferred in water heating kettle, the hydro-thermal reaction 20h at 130 DEG C of constant temperature, after reaction terminates, is naturally cooled to room temperature, is used successively
Alcohol and deionized water centrifuge, washing, repeated washing three times after, gained is precipitated into drying；
Step 2, take 0.7g polyvinyl alcohol to be put into the conical flask equipped with 12g distilled water, be stirred continuously in the case where being incubated 90 DEG C,
It is allowed to be completely dissolved, naturally cools to room temperature；Then above-mentioned precipitation is taken, continues to stir 6h, obtains mixed solution A；Then will be upper
State mixed solution A to be fitted into spinneret pipe, insert 10cm copper wire as positive pole, aluminium foil is negative pole as receiver board, electrostatic
Institute's making alive is 15kV during spinning, and distance is 20cm between spinning head fish receiver board, carries out electrostatic spinning, obtain polyvinyl alcohol/
ZnO/Ag/Al composite nano fibers；
Step 3, above-mentioned polyvinyl alcohol/ZnO/Ag/Al composite nano fibers are made annealing treatment into 5h at 550 DEG C, to remove
High-molecular polyivnyl alcohol, obtain ZnO composite nano fibers.
In the present embodiment, the mass content of metal nanometer line is 8% in the ZnO composite nano fibers, and the ZnO is compound
Al mass content is 6% in nanofiber.
The electric current of heating coil is flowed through to regulate and control the operating temperature of sensor by changing, and is in not by measurement sensor
Resistance value during with gas between two gold electrodes can obtain the sensitivity of sensor.Spirit of the sensor for alcohol gas
Sensitivity S is defined as：S=Rg/Ra, wherein Rg and Ra be respectively sensor in alcohol gas and air when two gold electrodes between electricity
Resistance, it is found that the sensitivity of the sensor is 17.2 in the present embodiment.
Embodiment 3
In the present embodiment, described alcohol gas sensor is heater-type structure, by outer surface come with 2 it is parallel and point
Alumina ceramic tube, the sensitive material coated in ceramic pipe surface, the nichrome through earthenware of vertical annular gold electrode
Heating coil is formed, and two platinum filament pins are connected with each gold electrode；The sensitive material is ZnO prepared by method of electrostatic spinning
Composite nano fiber, thickness are 0.2~0.5mm, and, the ZnO composite nano-fiber materials are specially that ZnO microsphere doping metals are received
Rice noodles and Al.
The preparation process of above-mentioned ZnO composite nano fibers is as follows：
Step 1, take 9mmol urea and 6mmol zinc acetates to be dissolved in 40ml deionized water, stir；Then to
Al (NO are added in above-mentioned solution3)2·9H2O, stir；Ag nano wires are added into above-mentioned solution again, will after stirring
Solution is transferred in water heating kettle, the hydro-thermal reaction 20h at 130 DEG C of constant temperature, after reaction terminates, is naturally cooled to room temperature, is used successively
Alcohol and deionized water centrifuge, washing, repeated washing three times after, gained is precipitated into drying；
Step 2, take 0.7g polyvinyl alcohol to be put into the conical flask equipped with 12g distilled water, be stirred continuously in the case where being incubated 90 DEG C,
It is allowed to be completely dissolved, naturally cools to room temperature；Then above-mentioned precipitation is taken, continues to stir 6h, obtains mixed solution A；Then will be upper
State mixed solution A to be fitted into spinneret pipe, insert 10cm copper wire as positive pole, aluminium foil is negative pole as receiver board, electrostatic
Institute's making alive is 15kV during spinning, and distance is 20cm between spinning head fish receiver board, carries out electrostatic spinning, obtain polyvinyl alcohol/
ZnO/Ag/Al composite nano fibers；
Step 3, above-mentioned polyvinyl alcohol/ZnO/Ag/Al composite nano fibers are made annealing treatment into 5h at 550 DEG C, to remove
High-molecular polyivnyl alcohol, obtain ZnO composite nano fibers.
In the present embodiment, the mass content of metal nanometer line is 9% in the ZnO composite nano fibers, and the ZnO is compound
Al mass content is 7% in nanofiber.
The electric current of heating coil is flowed through to regulate and control the operating temperature of sensor by changing, and is in not by measurement sensor
Resistance value during with gas between two gold electrodes can obtain the sensitivity of sensor.Spirit of the sensor for alcohol gas
Sensitivity S is defined as：S=Rg/Ra, wherein Rg and Ra be respectively sensor in alcohol gas and air when two gold electrodes between electricity
Resistance, it is found that the sensitivity of the sensor is 15.6 in the present embodiment.
The preferred mode of the present invention is the foregoing is only, is not intended to limit the invention, it is all in the spiritual and former of the present invention
Within then, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (7)
1. a kind of vehicle-mounted gas detection means, the vehicle-mounted gas detection means includes housing, and air vent is surrounded by housing, its
It is characterised by, alcohol gas sensor, microprocessor, motor braking circuit and alarm module, the ethanol is provided with enclosure interior
Gas sensor is connected to the input of microprocessor, and the output end of the microprocessor connects motor braking circuit and alarm respectively
Module, motor braking circuit are connected to Vehicle Controller by wireless communication apparatus；Described alcohol gas sensor, by appearance
Face comes with the alumina ceramic tubes of 2 parallel and discrete annular gold electrodes, the sensitive material coated in ceramic pipe surface, worn
The nichrome heating coil composition of earthenware is crossed, two platinum filament pins are connected with each gold electrode；The sensitive material is quiet
ZnO composite nano fibers prepared by electrical spinning method, the ZnO composite nano-fiber materials are specially ZnO microsphere doping metals nanometer
Line and Al.
2. a kind of vehicle-mounted gas detection means according to claim 1, it is characterised in that the sensitive material thickness is
0.2~0.5mm, a diameter of 300nm of ZnO composite nano fibers.
3. a kind of vehicle-mounted gas detection means according to claim 1 or 2, it is characterised in that the ZnO composite Nanos are fine
Al mass content is 5~7% in dimension.
4. a kind of vehicle-mounted gas detection means according to claim 1 or 2, it is characterised in that the ZnO composite Nanos are fine
In dimension, the metal nanometer line is Ag nano wires, and the mass content of the Ag nano wires is 6~9%, and the Ag nanowire lengths are
300nm, a diameter of 60nm.
A kind of 5. vehicle-mounted gas detection means according to claim 1 or 2, it is characterised in that the system of above-mentioned sensitive material
Standby step：
Step 1, take 9mmol urea and 6mmol zinc acetates to be dissolved in 40ml deionized water, stir；State then up
Al (NO are added in solution3)2·9H2O, stir；Ag nano wires are added into above-mentioned solution again, after stirring, by solution
It is transferred in water heating kettle, the hydro-thermal reaction 20h at 130 DEG C of constant temperature, after reaction terminates, naturally cools to room temperature, use alcohol successively
With deionized water centrifuge, washing, repeated washing three times after, gained is precipitated into drying；
Step 2, take 0.7g polyvinyl alcohol to be put into the conical flask equipped with 12g distilled water, be stirred continuously, be allowed in the case where being incubated 90 DEG C
It is completely dissolved, naturally cools to room temperature；Then above-mentioned precipitation is taken, continues to stir 6h, obtains mixed solution A；Then will be above-mentioned mixed
Close solution A to be fitted into spinneret pipe, a piece 10cm of insertion copper wire is as positive pole, and aluminium foil is negative pole as receiver board, electrostatic spinning
When, institute's making alive was 15kV, and distance is 20cm between spinning head fish receiver board, carries out electrostatic spinning, obtains polyvinyl alcohol/ZnO/
Ag/Al composite nano fibers；
Step 3, above-mentioned polyvinyl alcohol/ZnO/Ag/Al composite nano fibers are made annealing treatment into 5h at 550 DEG C, to remove high score
Sub- polyvinyl alcohol, obtain ZnO composite nano fibers.
6. a kind of vehicle-mounted gas detection means according to claim 1, it is characterised in that the vehicle-mounted gas detection means
Display module is additionally provided with housing, display module is connected to the output end of microprocessor.
7. a kind of vehicle-mounted gas detection means according to claim 1, it is characterised in that described alarm module is light
Alarm and/or phonetic alarm.
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|---|---|---|---|---|
| CN107917993A (en) * | 2017-12-11 | 2018-04-17 | 朱明君 | A kind of vehicle-mounted gas detection device |
| TWI661186B (en) * | 2018-01-25 | 2019-06-01 | 長庚大學 | Optical gas sensor, system and manufacturing method thereof |
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| Publication number | Publication date |
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| CN107340321B (en) | 2019-01-25 |
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