CN108168613A - The air-quality monitoring system to cooperate with unmanned plane - Google Patents
The air-quality monitoring system to cooperate with unmanned plane Download PDFInfo
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- CN108168613A CN108168613A CN201711490188.2A CN201711490188A CN108168613A CN 108168613 A CN108168613 A CN 108168613A CN 201711490188 A CN201711490188 A CN 201711490188A CN 108168613 A CN108168613 A CN 108168613A
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Abstract
The present invention relates to a kind of air-quality monitoring system to cooperate with unmanned plane, including more rotary wind type unmanned planes, it is characterised in that：Monitoring device is fixed in the bottom of unmanned plane, monitoring device includes the control circuit of shell and installation inside the shell, control circuit includes microprocessor and the sensor assembly being acquired to air quality, sensor assembly is connected with the input terminal of microprocessor, and the air hole entered for air is offered on shell；The sensor assembly includes being respectively connected to microprocessor difference input port：PM10 sensors, PM2.5 sensors, CO sensors, NO2Sensor, O3Sensor, SO2Sensor and Temperature Humidity Sensor；The NO2Sensor is thick-film type, uses ceramic substrate as substrate, is equipped on the ceramic substrate and inserts finger electrode, inserts finger electrode and is equipped with sensitive thin film, the sensitive thin film is ZnO nano piece and Au/SnO2The mixture of/RGO composite materials.
Description
Technical field
The present invention relates to field of monitoring of air quality more particularly to a kind of air quality monitorings to cooperate with unmanned plane
System.
Background technology
In today's society, country pays much attention to Ecological Civilization Construction and environmental protection.It is well known that the master of air pollution
It is dust and gas to want ingredient.Dust mainly includes burn halfway dust, oil droplet, coal dust and pyrolysis product etc., gas master
To include SO2、CO、CO2、NO、O3And vapor etc., therefore environmental pollution is not the pollution of Single Pollution object, is a variety of toxic
The composite pollution of dust and gas is monitored it particularly to the monitoring of fixed plant area pollutant emission situation so as to fulfill effective
Improvement has important practical significance and social value.
Method currently used for environment monitoring includes the use of portable pollution analyzer and is detected and pacifies in fixed location
Load continues the mode of the pollution analyzer of monitoring, and there are respective deficiencies for existing mode：Wherein use hand-held analyzer
Mode typically just monitor more conventional several monitoring points, while polluted by manually carrying portable pollution analyzer
During analysis, real-time monitoring can not be realized, therefore its mobility is poor, while if when monitored ground point pollution is more serious,
Injury will also result in itself to staff's body.And the mode of pollution analyzer continuously monitored in fixed location installation, by
It is fixed in its detection site, therefore mobility is worse, while needs the installation and deployment of long period, it can not be to disposal of pollutants source reality
Now quickly monitoring.
Invention content
The present invention is intended to provide a kind of air-quality monitoring system to cooperate with unmanned plane, to solve set forth above ask
Topic.
A kind of air-quality monitoring system to cooperate with unmanned plane is provided in the embodiment of the present invention, including revolving more
Wing formula unmanned plane, monitoring device is fixed in the bottom of unmanned plane, and monitoring device includes the control of shell and installation inside the shell
Circuit processed, control circuit include microprocessor and the sensor assembly that is acquired to air quality, sensor assembly with it is micro-
The input terminal of processor is connected, and the air hole entered for air is offered on shell；
The sensor assembly includes being respectively connected to microprocessor difference input port：PM10 sensors, PM2.5 are passed
Sensor, CO sensors, NO2Sensor, O3Sensor, SO2Sensor and Temperature Humidity Sensor；The NO2Sensor is thick film
Type uses ceramic substrate as substrate, is equipped on the ceramic substrate and inserts finger electrode, inserts finger electrode and is equipped with sensitive thin film, described
Sensitive thin film is ZnO nano piece and Au/SnO2The mixture of/RGO composite materials.
Preferably, the shell is fixed on the bottom of unmanned plane by fixed frame, is parched if offering on the surface thereof
Stomata.
Preferably, it is provided with the camera of access control circuit simultaneously in the inside of the shell, camera is by opening
The through-hole being located on any one surface of outer casing underpart or border is drawn.
Preferably, the wireless digital broadcasting station for carrying out data transmission with ground, nothing are further included in the control circuit
The antenna of line data radio station is drawn from case surface；The storage mould for carrying out data storage is further included in the control circuit
Block；The fixed frame upper surface is fixed on the bottom of unmanned plane, and lower surface is provided with fixed card slot, in monitoring device upper surface
It is provided with and slides the guide rail clamped with fixed card slot.
Preferably, in sensitive thin film, the Au/SnO2/ RGO composite materials are prepared by hydro-thermal method, the composite wood
Material is in two-dimensional sheet structure, Au and SnO2It is nano-particle, is uniformly supported on graphene surface；The Au nanoparticles seed
Diameter is 10nm；The SnO2Nano particle diameter is 5nm；In the composite material, Au, SnO2Mass ratio with RGO is 7:5:4.
The technical solution that the embodiment of the present invention provides can include the following benefits：
In the air-quality monitoring system of invention, air quality is supervised by carrying monitoring device on unmanned plane
It surveys, substantially increases the motor-driven of air quality monitoring in the prior art；By setting by PM10 sensors, PM2.5 sensors, CO
Sensor, NO2Sensor, O3Sensor, SO2The sensor assembly of sensor and Temperature Humidity Sensor composition, can be to air
In the data of multiple parameters be acquired, data acquire more fully；Also, the NO2Sensor is based on ZnO nano piece
And Au/SnO2The mixture of/RGO composite materials has short excellent of high sensitivity, response time at room temperature as sensitive thin film
Point.
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
It obtains significantly or is recognized by the practice of the present invention.It should be understood that above general description and following detailed description are only
It is exemplary and explanatory, the present invention can not be limited.
Description of the drawings
Using attached drawing, the invention will be further described, but the embodiment in attached drawing does not form any limit to the present invention
System, for those of ordinary skill in the art, without creative efforts, can also obtain according to the following drawings
Other attached drawings.
Fig. 1 is the air-quality monitoring system structure diagram of the present invention.
Fig. 2 is the air-quality monitoring system mechanism for monitoring front view of the present invention.
Fig. 3 is the air-quality monitoring system mechanism for monitoring right view of the present invention.
Fig. 4 is the air-quality monitoring system mechanism for monitoring control circuit principle block diagram of the present invention.
Wherein：1- unmanned planes, 2- monitoring devices, 3- spiral arms, 4- undercarriages, 5- propellers, 6- shells, 7- air holes, 8-
Fixed guide rail, 9- antennas, 10- cameras.
Specific embodiment
Here exemplary embodiment will be illustrated in detail, example is illustrated in the accompanying drawings.Following description is related to
During attached drawing, unless otherwise indicated, the same numbers in different attached drawings represent the same or similar 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 device and method of some aspects being described in detail in claims, of the invention.
The embodiment of the present invention is related to a kind of air-quality monitoring system to cooperate with unmanned plane, as shown in Figure 1, packet
Unmanned plane 1 is included, unmanned plane 1 is realized using common multi-rotor unmanned aerial vehicle, and a plurality of spiral arm 3 is provided in the border of unmanned plane 1,
The end of every spiral arm 3 is respectively arranged with a propeller 5, and the lower part both sides of unmanned plane 1 are provided with undercarriage 4, for pair
Unmanned plane 1 under off working state is supported.It is fixed in the underface of unmanned plane 1 by fixed frame and air quality is carried out
The monitoring device 2 of monitoring carries the monitoring that the lift-off of monitoring device 2 carries out air quality when 1 flight of unmanned plane simultaneously.
As shown in figures 2-3, monitoring device 2 includes the shell 6 of cuboid, and the control of monitoring device 2 is fixed in shell 6
Circuit processed is provided with the sensor for being monitored to air on the control circuitry.Two are offered on the right side of shell 6
A through-hole, one of through-hole is for drawing antenna 9, and antenna 9 is connected in control circuit, for the number for arriving Sensor monitoring
According to wirelessly sending in real time to ground.Camera 10 is internally provided in another through-hole, camera 10 is simultaneously
It is connected in control circuit, camera work can be carried out while air quality monitoring is carried out.In at least one table of shell 6
Several air holes 7 are offered on face, air is entered by air hole 7 inside shell 6, and sensor is facilitated to be monitored air.
The fixed guide rail 8 of two set in the same direction is provided in the upper surface of the shell 6 of monitoring device 2, for unmanned plane 1
The fixed frame of lower section is attached fixation.Various ways can be used in fixed guide rail 8, in the technical program, it is preferred to use T-shaped to lead
Rail, with reference to Fig. 1, the fixed frame for being arranged on 1 lower section of unmanned plane uses " several " type frame body, and end face is fixed on the bottom of unmanned plane 1 thereon
Portion, the bottom of two lower faces are provided with the T-shaped card slot with the fixed cooperation of guide rail 8 installation, the fixed one end of guide rail 8 from fixed frame
Into T-shaped guide groove, being fixedly connected for monitoring device 2 and unmanned plane 1 is realized.Not up to better fixed effect, can also set
It puts one or more fixing bolts fixed guide rail 8 and fixed frame are fixed, to prevent monitoring device 2 sliding from fixed frame
It is de-.
As shown in figure 4, the control circuit of above-mentioned monitoring device 2 includes：Microprocessor, memory module, GPS module, biography
Sensor module and wireless digital broadcasting station.Wireless digital broadcasting station and the memory module input/output terminal different from microprocessor respectively
Mouth is bi-directionally connected, and GPS module is connected with the signal input part of microprocessor, sensor assembly while the input terminal with microprocessor
Mouth connection, above-mentioned camera 10 are bi-directionally connected simultaneously with the input/output port of microprocessor.
Sensor assembly includes：PM10 sensors, PM2.5 sensors, CO sensors, NO2Sensor, O3Sensor, SO2
Respectively collected data are sent into the different of microprocessor respectively and inputted by sensor and Temperature Humidity Sensor, each sensor
Port, microprocessor earthward send data by wireless digital broadcasting station, and above-mentioned antenna 9 is wireless digital broadcasting station
Data transmission antenna.
Power supply is additionally provided with, power supply includes rechargeable battery (such as rechargeable lithium battery) and corresponding power supply
The voltage of rechargeable battery is converted to different voltage, to meet in control circuit by modular converter by power conversion module
The different power reguirements of each component.In control circuit, commercially available common chip microcontroller can be used in microprocessor, such as
MSP430 series monolithics.Memory module can be used conventional storage medium and realize, such as SD card, and memory module is used for sensor
The collected data of module are stored.
Specific work process and operation principle are as follows：
When needing to carry out air quality monitoring using this air-quality monitoring system, made by the remote controler of unmanned plane 1
Unmanned plane 1 takes off, and unmanned plane 1 carries monitoring device 2 simultaneously and goes up to the air；After monitoring device 2 is gone up to the air or during rising, outside
Control circuit inside shell 6 is detected air quality, and the different sensors of the sensor assembly in control circuit are right respectively
The content of different compositions in air is monitored, and monitoring data are sent into storage mould by the microprocessor in control circuit
It is stored in block, and can ground be sent to by wireless digital broadcasting station, by the equipment (such as computer) on ground to corresponding
Data are analyzed and are handled.
In order to reach better monitoring effect, NO in the prior art is solved2Operating temperature existing for sensor is higher, sensitive
The problem of poor is spent, NO of the present invention2Sensor is a kind of NO based on graphene2Sensor, the senor operating temperature
At room temperature, there is good sensitivity and faster response recovery time, be NO2The application of sensor provides more multiselect
It selects.
NO of the present invention2Sensor is thick-film type, uses ceramic substrate as substrate, is equipped with and inserts on the ceramic substrate
Refer to electrode, insert and refer to electrode equipped with sensitive thin film, which is 0.15mm, and the sensitive thin film is ZnO nano piece
And Au/SnO2The mixture of/RGO composite materials.In the prior art, the NO based on INVENTIONConventional metal-oxide2Sensor need compared with
It works at high temperature, increases sensor in-fighting, and the NO based on grapheme material2Sensor is expected to realize work at room temperature
Make；Graphene is a kind of novel carbon material, since its special atomic structure and complicated band structure make it have simultaneously
Characteristic of semiconductor and metallic character, and with excellent electron transmission performance, be widely used in developing room temperature NO2Sensor.But
It is since graphene surface is there are dangling bonds, such as hydroxyl, carboxyl, epoxy group, the absorption of gas molecule is limited, based on pure state
The NO of grapheme material2Sensor sheet reveals the shortcomings of poor, sensitivity is low, response recovery time is long to gas-selectively, and leads to
It crosses after being adulterated to graphene, graphene can be obviously improved to NO2Sensitivity.And it is current, using traditional gas sensitive, such as
Noble metal, metal oxide, conducting polymer etc. are grapheme modified and form ternary complex by them and be widely used in
Improve graphene-based NO2The sensing capabilities of sensor using the above method, can not only be such that each ingredient plays to gas sensitization
Advantage, and the physicochemical properties of graphene-based material can be adjusted so as to improve sensing capabilities.Graphene composite material is
It is widely used in the research of gas sensor, but graphene-based NO at room temperature2Sensor is there are still poor selectivity, sensitivity is low,
The problems such as response recovery time is long.
Based on above-mentioned background, in technical solution of the present invention, the sensitive thin film is ZnO nano piece and Au/SnO2/RGO
The mixture of composite material, and the mixture have passed through the processing of plasma, on the basis of the two combination so that described
Sensitive thin film produces unexpected technique effect so that the sensitive performance of sensor greatly improves.Specifically, it is of the invention
It is by Au/SnO in above-mentioned sensitive thin film2/ RGO dispersant liquid drops are coated onto ZnO nano piece surface, and by the place of plasma
Reason, so as to form the sensor sensing film；The Au/SnO2/ RGO composite materials are dispersed in ZnO nano piece surface, and
And graphene sheet layer is combined with ZnO nano piece；The Au/SnO2In/RGO composite materials, RGO is in lamella, Au and SnO2To receive
Rice corpuscles is modified on lamella RGO surfaces, which constitutes the Au/SnO2The natural dispersive machine of/RGO composite materials
Structure so that the Au/SnO2/ RGO composite materials and NO2Contact area greatly increases, and produces unexpected technique effect,
Improve transducer sensitivity；In addition, redox graphene (RGO) and ZnO nano piece, SnO2, Au combine, by adulterating stone
Black alkene regulates and controls the semiconducting behavior of graphene, can be obviously improved graphene-based NO2The sensitivity characteristic of sensor；Above-mentioned combination
To NO2Sensitization is played, the transmission rate of electronics in sensitive material is improved, produces unexpected technique effect.
In sensitive thin film described in technical solution of the present invention, the ZnO nano piece and Au/SnO2The quality of/RGO composite materials
Than being 4:1.
In technical solution of the present invention, further by controlling quality when doping so that the sensitive material produces meaning
Technique effect unexpectedly so that the sensitive performance of sensor greatly improves.
Specifically, the ZnO nano piece is prepared by hydro-thermal method.Zinc oxide is a kind of semiconductor of good performance
Material, large-scale application is in fields such as air-sensitive, photoelectricity, photocatalysis, and in gas sensitive field, zinc oxide is three big gas sensitives
One of, it is widely used in the air-sensitive detection of ethyl alcohol etc., and there are no zinc oxide and graphene are combined as room in the prior art
The lower NO of temperature2The technical solution of gas sensor sensitive material.In technical solution of the present invention, by by Zinc oxide nano sheet and graphite
Alkene combines, and regulates and controls the semiconducting behavior of graphene, produces unexpected technique effect, improves the sensitivities of sensitive material
Energy.
Specifically, the Au/SnO2/ RGO composite materials are prepared by hydro-thermal method, which is in two-dimensional sheet
Structure, Au and SnO2It is nano-particle, is uniformly supported on graphene surface；The Au nano particle diameters are 10nm；Institute
State SnO2Nano particle diameter is 5nm；In the composite material, Au, SnO2Mass ratio with RGO is 7:5:4.The composite wood
In material, by adulterating Au and SnO in graphene surface2Nano-particle improves the electron transfer rate of sensitive material so that multiple
Condensation material has porous structure, meanwhile, the SnO of N-shaped2P-n junction is formed between nano-particle and the graphene of p-type, so as to improve
Sensitivity characteristic.
NO of the present invention2The preparation process of sensor is：
Step 1, ZnO nano piece is prepared
The urea of 3.5g and the zinc acetate of 1g are taken respectively, and urea and zinc acetate are dissolved in 40ml goes in example water, is formed
Then mixed solution stirs 50min, mixed solution is transferred in the conical flask of 100ml after stirring, conical flask is put in sealing
In baking oven, 8h is kept the temperature at 95 DEG C, then natural cooling, will precipitation centrifugation, washing, then in 60 DEG C of dry 3h, finally, will sink
Form sediment 320 DEG C of calcining 2h in Muffle furnace, obtains the ZnO nano piece powder；
Step 2, Au/SnO is prepared2/ RGO composite materials
A) graphite oxide is prepared
The preparation of GO is completed by improved Hummers methods：First, by the graphite powder of 0.1g and the dense sulphur of 2.3ml
Acid solution mixes, and is stirred at room temperature for 24 hours, then, the sodium nitrate of 10mg is added in mixture and continues to stir 40min, so
Afterwards, mixture is placed in ice bath, is slowly added to 0.3g potassium permanganate thereto, after object to be mixed stirs evenly, it is carried out
35-40 DEG C of heating water bath processing 40min, until reacting sticky, is slow added into 4.6ml distilled water, and said mixture is existed
Heating stirring 15min at 75 DEG C, finally, it is anti-to terminate that the hydrogenperoxide steam generator of 14ml distilled water and 1ml are added in into mixture
It should；Then,
Gained mixture is cleaned repeatedly with distilled water, until solution is in neutrality, then will to be deposited on solution bottom not oxidized
The graphite powder of stripping and the GO piece layer separations by oxidation stripping dispersion in aqueous solution, dried GO is dispersed in again
The GO solution of a concentration of 1.0mg/ml is configured in example water；
B) Au/SnO is prepared2/ RGO composite materials
The above-mentioned GO solution of 1ml is added in 40ml distilled water, then by SnCl4·5H2O is added in the dispersion liquid of GO,
Solution, is then transferred in the hydrothermal reaction kettle of 50ml by ultrasonic disperse 30min, and 180 DEG C of reactions in an oven are put after sealing
12h centrifuges products therefrom, obtains In2O3/ RGO dispersion liquids；
Au nano-particles are added to above-mentioned In again2O3In/RGO dispersion liquids, mixed solution is heated to 100 DEG C of reactions
60min, products therefrom are centrifuged, wash, and obtain the Au/SnO2/ RGO composite material dispersion liquids；
Step 3, corona treatment
By Au/SnO obtained above2/ RGO composite material dispersant liquid drops are coated onto ZnO nano piece powder surface, grinding
60min, be ultrasonically treated 20min, be uniformly mixed it, then, mixture is subjected to the processing of low temperature radio frequency argon plasma, wait from
Sub- generating means is inductive coupling, and working frequency 15.24MHz, power 350W, air pressure 45Pa, gas flow rate is
22sccm, processing time 40min；
In technical solution of the present invention, by Au/SnO2/ RGO composite material dispersant liquid drops are coated onto ZnO nano piece powder surface,
The graphene sheet layer can be effectively adsorbed on Zinc oxide nano sheet surface, further increase specific surface area, in addition, mixture passes through
Argon plasma processing is crossed, the surface nature of composite material can be effectively improved,
Increase surface-active, for improving NO2Sensitivity, reduction minimal detectable concentration produce unexpected technology effect
Fruit.
Step 4, NO is prepared2Sensor
By step 3 plasma treated mixture with example water being gone to be uniformly mixed in right amount, ground in mortar
Gained paste is coated on the ceramic bases surface for inserting finger electrode, after dry, obtains the NO by 10min2Sensor；
Specifically, the slotting finger electrode is Au electrodes, Au electrode lines width is 0.1mm, refers to spacing as 0.15mm, inserts and refer to
Thickness of electrode is 0.1~0.2mm.
Embodiment
In the present embodiment, the NO2Sensor is thick-film type, and ceramic substrate is used to be set on the ceramic substrate for substrate
Have to insert and refer to electrode, insert and refer to electrode equipped with sensitive thin film, which is 0.15mm, and the sensitive thin film is received for ZnO
Rice piece and Au/SnO2The mixture of/RGO composite materials；The ZnO nano piece and Au/SnO2The mass ratio of/RGO composite materials is 4:
1。
Prepared by the ZnO nano piece hydro-thermal method.
The Au/SnO2/ RGO composite materials are prepared by hydro-thermal method, and the composite material is in two-dimensional sheet structure, Au
And SnO2It is nano-particle, is uniformly supported on graphene surface；The Au nano particle diameters are 10nm；The SnO2It receives
Rice corpuscles grain size is 5nm；In the composite material, Au, SnO2Mass ratio with RGO is 7:5:4.
NO described in the present embodiment2The preparation process of sensor is：
Step 1, ZnO nano piece is prepared
The urea of 3.5g and the zinc acetate of 1g are taken respectively, and urea and zinc acetate are dissolved in 40ml goes in example water, is formed
Then mixed solution stirs 50min, mixed solution is transferred in the conical flask of 100ml after stirring, conical flask is put in sealing
In baking oven, 8h is kept the temperature at 95 DEG C, then natural cooling, will precipitation centrifugation, washing, then in 60 DEG C of dry 3h, finally, will sink
Form sediment 320 DEG C of calcining 2h in Muffle furnace, obtains the ZnO nano piece powder；
Step 2, Au/SnO is prepared2/ RGO composite materials
A) graphite oxide is prepared
The preparation of GO is completed by improved Hummers methods：First, by the graphite powder of 0.1g and the dense sulphur of 2.3ml
Acid solution mixes, and is stirred at room temperature for 24 hours, then, the sodium nitrate of 10mg is added in mixture and continues to stir 40min, so
Afterwards, mixture is placed in ice bath, is slowly added to 0.3g potassium permanganate thereto, after object to be mixed stirs evenly, it is carried out
35-40 DEG C of heating water bath processing 40min, until reacting sticky, is slow added into 4.6ml distilled water, and said mixture is existed
Heating stirring 15min at 75 DEG C, finally, it is anti-to terminate that the hydrogenperoxide steam generator of 14ml distilled water and 1ml are added in into mixture
It should；Then, gained mixture is cleaned repeatedly with distilled water, until solution is in neutrality, then will to be deposited on solution bottom not oxidized
The graphite powder of stripping and the GO piece layer separations by oxidation stripping dispersion in aqueous solution, dried GO is dispersed in again
The GO solution of a concentration of 1.0mg/ml is configured in example water；
B) Au/SnO is prepared2/ RGO composite materials
The above-mentioned GO solution of 1ml is added in 40ml distilled water, then by SnCl4·5H2O is added in the dispersion liquid of GO,
Solution, is then transferred in the hydrothermal reaction kettle of 50ml by ultrasonic disperse 30min, and 180 DEG C of reactions in an oven are put after sealing
12h centrifuges products therefrom, obtains In2O3/ RGO dispersion liquids；
Au nano-particles are added to above-mentioned In again2O3In/RGO dispersion liquids, mixed solution is heated to 100 DEG C of reactions
60min, products therefrom are centrifuged, wash, and obtain the Au/SnO2/ RGO composite material dispersion liquids；
Step 3, corona treatment
By Au/SnO obtained above2/ RGO composite material dispersant liquid drops are coated onto ZnO nano piece powder surface, grinding
60min, be ultrasonically treated 20min, be uniformly mixed it, then, mixture is subjected to the processing of low temperature radio frequency argon plasma, wait from
Sub- generating means is inductive coupling, and working frequency 15.24MHz, power 350W, air pressure 45Pa, gas flow rate is
22sccm, processing time 40min；
In technical solution of the present invention, by Au/SnO2/ RGO composite material dispersant liquid drops are coated onto ZnO nano piece powder surface,
The graphene sheet layer can be effectively adsorbed on Zinc oxide nano sheet surface, further increase specific surface area, in addition, mixture passes through
Argon plasma processing is crossed, the surface nature of composite material can be effectively improved,
Increase surface-active, for improving NO2Sensitivity, reduction minimal detectable concentration produce unexpected technology effect
Fruit.
Step 4, NO is prepared2Sensor
By step 3 plasma treated mixture with example water being gone to be uniformly mixed in right amount, ground in mortar
Gained paste is coated on the ceramic bases surface for inserting finger electrode, after dry, obtains the NO by 10min2Sensor；
Specifically, the slotting finger electrode is Au electrodes, Au electrode lines width is 0.1mm, refers to spacing as 0.15mm, inserts and refer to
Thickness of electrode is 0.1~0.2mm.
Reference examples 1
Compared to above-described embodiment, ZnO nano piece is not provided in the sensitive thin film.
Reference examples 2
Compared to above-described embodiment, the Au/SnO of the sensitive thin film2Au nano-particles are not provided with in/RGO composite materials.
Reference examples 3
Compared to above-described embodiment, the Au/SnO of the sensitive thin film2SnO is not provided with in/RGO composite materials2Nanoparticle
Son.
Reference examples 4
Compared to above-described embodiment, the sensitive thin film does not pass through plasma treatment.
Using gas-sensitive property tester to NO of the present invention2Sensor is tested：First certain density object gas is noted
Enter into sealing test chamber, treat air in object gas and chamber after mixing, then by NO2Sensor is put into test chamber.
NO in the present invention2Sensitivity, response recovery time of sensor etc. use this field usual definition.
First, the sensor obtained respectively to embodiment and reference examples is at room temperature to the NO of 5ppm2Carry out response test,
Test result is as follows table 1：
It can be seen that the sensor that embodiment obtains is respectively provided with clear superiority in sensitivity, response recovery time, produces
Unexpected technique effect.Then, by NO obtained by embodiment2Sensor is to the NO of 1ppm2Response test is carried out, is found sensitive
Degree is still up to 23.1, reduces NO2Minimal detectable concentration.
The foregoing is merely the preferred modes of the present invention, are not intended to limit the invention, all spirit and original in the present invention
Within then, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (8)
1. the air-quality monitoring system to cooperate with unmanned plane, including more rotary wind type unmanned planes, it is characterised in that：At nobody
The bottom of machine is fixed with monitoring device, and monitoring device includes the control circuit of shell and installation inside the shell, control circuit packet
Include microprocessor and the sensor assembly being acquired to air quality, the input terminal phase of sensor assembly and microprocessor
Even, the air hole entered for air is offered on shell；
The sensor assembly includes being respectively connected to microprocessor difference input port：PM10 sensors, PM2.5 sensings
Device, CO sensors, NO2Sensor, O3Sensor, SO2Sensor and Temperature Humidity Sensor；The NO2Sensor is thick film
Type uses ceramic substrate as substrate, is equipped on the ceramic substrate and inserts finger electrode, inserts finger electrode and is equipped with sensitive thin film, described
Sensitive thin film is ZnO nano piece and Au/SnO2The mixture of/RGO composite materials.
A kind of 2. air-quality monitoring system to cooperate with unmanned plane according to claim 1, which is characterized in that institute
The shell stated is fixed on the bottom of unmanned plane by fixed frame, offers several air holes on the surface thereof.
3. a kind of air-quality monitoring system to cooperate with unmanned plane according to claim 2, which is characterized in that
The inside of the shell is provided with the camera of access control circuit simultaneously, and camera is by being opened in outer casing underpart or border
Any one surface on through-hole draw.
A kind of 4. air-quality monitoring system to cooperate with unmanned plane according to claim 1, which is characterized in that institute
Further include the wireless digital broadcasting station for carrying out data transmission with ground in the control circuit stated, the antenna of wireless digital broadcasting station from
Case surface is drawn；The memory module for carrying out data storage is further included in the control circuit；On the fixed frame
Surface is fixed on the bottom of unmanned plane, and lower surface is provided with fixed card slot, is provided in monitoring device upper surface and fixed card slot
Slide the guide rail clamped.
5. a kind of air-quality monitoring system to cooperate with unmanned plane according to claim 1, which is characterized in that quick
Feel in film, the Au/SnO2/ RGO composite materials are prepared by hydro-thermal method, which is in two-dimensional sheet structure,
Au and SnO2It is nano-particle, is uniformly supported on graphene surface；The Au nano particle diameters are 10nm；The SnO2
Nano particle diameter is 5nm；In the composite material, Au, SnO2Mass ratio with RGO is 7:5:4.
A kind of 6. air-quality monitoring system to cooperate with unmanned plane according to claim 5, which is characterized in that institute
Sensitive thin film thickness is stated as 0.15mm.
A kind of 7. air-quality monitoring system to cooperate with unmanned plane according to claim 5, which is characterized in that institute
State ZnO nano piece and Au/SnO2The mass ratio of/RGO composite materials is 4:1.
A kind of 8. air-quality monitoring system to cooperate with unmanned plane according to claim 5, which is characterized in that institute
State NO2The preparation process of sensor is：
Step 1, ZnO nano piece is prepared
The urea of 3.5g and the zinc acetate of 1g are taken respectively, and urea and zinc acetate are dissolved in 40ml goes in example water, forms mixing
Then solution stirs 50min, mixed solution is transferred in the conical flask of 100ml after stirring, conical flask is placed in baking by sealing
In case, 8h is kept the temperature at 95 DEG C, then natural cooling, will precipitation centrifugation, washing, then in 60 DEG C of dry 3h, finally, will be deposited in
320 DEG C of calcining 2h, obtain the ZnO nano piece powder in Muffle furnace；
Step 2, Au/SnO is prepared2/ RGO composite materials
A) graphite oxide is prepared, the preparation of GO is completed by improved Hummers methods；
B) Au/SnO is prepared2/ RGO composite materials
The above-mentioned GO solution of 1ml is added in 40ml distilled water, then by SnCl4·5H2O is added in the dispersion liquid of GO, ultrasound
Disperse 30min, then solution is transferred in the hydrothermal reaction kettle of 50ml, 180 DEG C of reaction 12h in an oven are put after sealing, it will
Products therefrom centrifuges, and obtains In2O3/ RGO dispersion liquids；
Au nano-particles are added to above-mentioned In again2O3In/RGO dispersion liquids, mixed solution is heated to 100 DEG C of reaction 60min,
Products therefrom is centrifuged, washs, and obtains the Au/SnO2/ RGO composite material dispersion liquids；
Step 3, corona treatment
By Au/SnO obtained above2/ RGO composite material dispersant liquid drops are coated onto ZnO nano piece powder surface, grinding 60min, surpass
Sonication 20min is uniformly mixed it, then, mixture is carried out the processing of low temperature radio frequency argon plasma, plasma fills
It is set to inductive coupling, working frequency 15.24MHz, power 350W, air pressure 45Pa, gas flow rate 22sccm, during processing
Between be 40min；
Step 4, NO is prepared2Sensor
By step 3 plasma treated mixture with example water is gone to be uniformly mixed in right amount, 10min is ground in mortar,
Gained paste is coated on the ceramic bases surface for inserting finger electrode, after dry, obtains the NO2Sensor；Described
It inserts and refers to electrode as Au electrodes, Au electrode lines width is 0.1mm, refers to spacing as 0.15mm, inserts and refers to thickness of electrode as 0.1~0.2mm.
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