CN206627444U - A kind of Nitrogen dioxide testing instrument based on fluorescent nano material - Google Patents
A kind of Nitrogen dioxide testing instrument based on fluorescent nano material Download PDFInfo
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- CN206627444U CN206627444U CN201720423641.7U CN201720423641U CN206627444U CN 206627444 U CN206627444 U CN 206627444U CN 201720423641 U CN201720423641 U CN 201720423641U CN 206627444 U CN206627444 U CN 206627444U
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- nitrogen dioxide
- microprocessor
- photodetector
- power supply
- display
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- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
The utility model provides a kind of Nitrogen dioxide testing instrument based on fluorescent nano material, including the equipment such as photodetector, display, microprocessor, power supply, electric-controlled switch, fluorescence nano reactor and suction pump.Suction pump sucks certain density nitrogen dioxide gas, and fluorescence nano reactor touches nitrogen dioxide, causes fluorescent intensity to change；Microprocessor connects photodetector and display, the data of photodetector collection peripheral light source light intensity change, the signal collected is transferred into microprocessor；Microprocessor analysis signal, content of nitrogen dioxide data corresponding to light intensity are shown over the display；Power supply connects power supply to each power elements, electric-controlled switch, controls the break-make of power supply circuit.Nitrogen dioxide testing instrument described in the utility model based on fluorescent nano material, is not only simple in structure, and job stability, reliability are high；And reasonable price.
Description
Technical field
The utility model belongs to photoelectric sense technology field, and in particular to a kind of Nitrogen dioxide testing using photoelectric sensing
Instrument, it may be used in the monitoring process of nitrogen dioxide.
Background technology
Nitrogen dioxide is the gaseous material of a kind of brownish red, high activity.Nitrogen dioxide rises in the forming process of ozone
Important function.Nitrogen dioxide caused by artificial is essentially from the release of high-temp combustion process, such as motor vehicle, power plant exhaust
Discharge etc..One of origin cause of formation of nitrogen dioxide or acid rain, caused environmental effect is varied, including：To wetland and terrestrial
The influence of competition and composition change between plant species, the reduction of atmospheric visibility, the acidifying of surface water, eutrophication (due to
Cause anoxic rich in the nutrients algal bloom such as nitrogen, phosphorus in water) and increase water body in be harmful to fish and other water
The content of toxins of biology.
Undoubtedly, nitrogen dioxide causes huge threat to ecological environment and life and health.According to Environmental
The requirement of air quality standard, the content of the especially nitrogen dioxide of nitrogen oxides in air is monitored in real time extremely urgent；
And the monitoring to nitrogen dioxide is the work such as air pollution early warning, air pollutants monitoring and air pollution treatment effective evaluation
Important evidence, this also just proposes higher requirement to on-line monitoring equipment, it is necessary to which detecting instrument provides accurate and real-time sky
The Monitoring Data of nitrogen dioxide content in gas.
At present, the method that existing nitrogen dioxide on-line computing model uses electrochemistry more, existing subject matter is electrode
Selectivity is not high, and side reaction easily occurs；Electrode easily forms adsorption layer and oxide-film, and being stained electrode raises voltage.In recent years, with
The further investigation to organic molecule fluorescence probe, it was found that fluorescent nano material is to NO2With good sensitiveness, but such as
This theory is applied to practice by what, can be sensitiveer, convenient, reliably right so as to design perfect Nitrogen dioxide testing instrument
It is the task of top priority that the content of nitrogen dioxide, which is monitored, in air.
Utility model content
The utility model provide it is a kind of can not only detect nitrogen dioxide gas and can carry out quantitative explanation,
Nitrogen dioxide testing instrument based on fluorescent nano material.The instrument can detect to the nitrogen dioxide pernicious gas in air,
And an air quality index is conversed by the gas concentration of detection, the index is that one of current air pollution degree is determined
Measure explanation.Further, the instrument can effectively prevent nitrogen dioxide gas intoxication accident.
In order to solve the above technical problems, the utility model provides a kind of Nitrogen dioxide testing based on fluorescent nano material
Instrument, including photodetector, display, microprocessor, electric-controlled switch, fluorescence nano reactor, suction pump and power supply, wherein：
The microprocessor input connects the photodetector, and output end connects the display；The photoelectricity is visited
Survey device and convert for sensing the light intensity of the fluorescent nano material and collect optical signal, and be converted into electric signal transmission to institute
State microprocessor；The microprocessor analyzes and processes to the signal from the photodetector, the knot that analysis is obtained
Fruit is converted to data message and shown on the display；The power supply connects the photodetector, microprocessor, shown respectively
Show device, for its power supply.
Preferably, the detector also includes electric-controlled switch and suction pump, and the electric-controlled switch connects the power supply, control
The break-make of power supply circuit；The suction pump is to be used to sample, and draws air into detector and is detected.
Preferably, the fluorescence nano reactor includes carbon nano dot (CDs) and the feux rouges paddy of the aminofunctional of blue light
Cadmium telluride (CdTe) quantum dot of the sweet peptide modification of Guang, the quantum dot and the NO of suction pump suction2Reacted, and caused
Light intensity changes.CDs has chemical inertness as a kind of new carbon nanomaterial, luminous not flash, water-soluble, and has
Good biocompatibility.The red fluorescence of CdTe quantum is to NO2It is especially sensitive, and the blue-fluorescence of carbon nano dot (CDs)
It is stable.By the CdTe quantum QDs covalent bonds of blue-fluorescence carbon nano dot (CDs) and emitting red light, double ratios launched are built
Rate fluorescence nano compound, NO2On CDs fluorescence without influence, and QDs can be acutely quenched, with NO2Concentration increase, complex fluorescence
Color is changed into blueness by orange red.And the fluorescent intensity ratio (I665/I460) that compound is sent is with NO2Change in concentration be in
Linear function changes.
Preferably, the photodetector also includes light-inductive unit and optical signal processing unit, the light-inductive
Unit is used to sense the change of light intensity and collects optical signal, and the OSP is collected into the light-inductive unit
Optical signal is amplified, reformed, delay process, and is converted to electric signal transmission to the microprocessor.
Preferably, during the microprocessor no signal input in a dormant state；When the photodetector is to described micro-
During output signal of processor, the microprocessor is waken up, and starts to receive simultaneously signal Analysis.
The beneficial effects of the utility model are as follows：
Fluorescent nano material is applied in the detection of nitrogen dioxide by Nitrogen dioxide testing instrument of the present utility model first, makes
Testing result is more accurate；And it is easy to use, it is simple to operate, suitable for the general public application in office and family, valency
Lattice are cheap, are easy to popularize.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the Nitrogen dioxide testing instrument based on fluorescent nano material provided by the utility model
Figure；
Fig. 2 is a kind of workflow of the Nitrogen dioxide testing instrument based on fluorescent nano material provided by the utility model
Figure；
Main element symbol description：
1- photodetectors；2- displays；3- microprocessors；4- power supplys；5- electric-controlled switch；6- fluorescence nano reactors；
7- suction pumps.
Embodiment
To make technical problem, involved technical scheme and advantage that the utility model solves clearer, below will
It is described in detail in conjunction with the drawings and the specific embodiments.
The utility model is directed to the problem of existing, there is provided a kind of ratio fluorescent sensor：It not only provides more accurate
Measurement, and there is high sensitivity, quick visual identity can be carried out.
A kind of as shown in figure 1, Nitrogen dioxide testing based on fluorescent nano material with high sensitivity and high selectivity
Instrument, main device include photodetector 1, display 2, microprocessor 3, power supply 4, electric-controlled switch 5, fluorescence nano reactor 6
With suction pump 7.
(1) chemical principle
The utility model has used a kind of detection NO2New ratio fluorescent nano probe, it includes the amino official of blue light
Cadmium telluride (CdTe) quantum dot (QDS) of carbon nano dot (CDs) and feux rouges the glutathione modification of energyization.CdTe quantum it is red
Color fluorescence is to NO2It is especially sensitive, when it touches the nitrogen dioxide in air, red fluorescence quenching；And carbon nano dot (CDs)
With chemical inertness, NO2On CDs fluorescence without influence, its blue-fluorescence is stable not to change, along with content of nitrogen dioxide
Increase, complex fluorescence color are changed into blueness by orange red, and the beam intensity ratio of two nano dots is also in the concentration of nitrogen dioxide
Linear relationship.
(2) key instrument function introduction
Power supply 4 is powered to light source, photodetector 1, display 2, microprocessor 3, suction pump 7；The input of electric-controlled switch 5
Termination power 4, the control signal output of the control termination photodetector 1 of electric-controlled switch 5.
Suction pump 7 is used to sample, and gas is as sample in extraction certain limit, to carry out the detection of next step.
Light source is used to excite fluorescence nano reactor 6, it is stored energy and sends fluorescence.
Photodetector 1 includes light-inductive unit and signal processing unit, the input termination light of optical signal processing unit
Quick sensing unit, output termination microprocessor 3.Light-inductive unit uses photaesthesia section bar material, for sensing the conversion of light intensity
And collect optical signal；Optical signal processing unit is amplified to the optical signal being collected into, reformed, delay process, and by optical signal
It is changed into electric signal transmission to microprocessor 3.
The signal input part of microprocessor 3 connects photodetector 1, output termination display 2, and microprocessor 3 is used to analyze
Processing.When microprocessor 3 does not work in a dormant state, it can wake up, and be analyzed and processed when receiving photosignal,
The light intensity (being converted into electric signal power here) at a particular wavelength of fluorescence nano reactor 6 and concentration curve are compared, will be analyzed
Obtained result is transformed into data-signal and further passes to display 2.
(3) overall workflow
The workflow of Nitrogen dioxide testing instrument of the present embodiment based on fluorescent nano material is as shown in Figure 2.When starting to examine
When surveying nitrogen dioxide, electric-controlled switch is opened, detector starts to initialize, and now microprocessor is in a dormant state；Detecting
Cheng Zhong, if containing finite concentration nitrogen dioxide in the gas of suction, the fluorescent intensity that fluorescence nano reactor is sent changes,
When light intensity change is in the induction range of photodetector, photodetector produces corresponding electric signal at once, through photaesthesia
After answering unit and signal processing unit amplified signal, the signal of collection is sent to microprocessor, while wake up and be in dormancy shape
The microprocessor of state analyzes and processes to the signal, compares the light intensity of fluorescence nano reactor at a particular wavelength and (turns here
Change electric signal power into) and concentration curve, the result that analysis obtains is transformed into data-signal and further passes to display.When
For light intensity not within photodetector induction range, microprocessor in a dormant state, reaches energy-saving effect all the time；Based on a large amount of
Experimental data, on the basis of to the comprehensive analysis of data, design can be programmed to microprocessor, need to optimize inspection for different
Scope is surveyed, can meet the needs of more wide variety of user colony.
In description of the present utility model, unless otherwise clearly defined and limited, term " connected ", " connection " should be done extensively
Reason and good sense solution, for example, it may be being fixedly connected or being detachably connected, or it is integrally connected；Can be joined directly together,
It can be indirectly connected by intermediary, can be the connection of two element internals.For one of ordinary skill in the art
Speech, concrete meaning of the above-mentioned term in the utility model can be understood with concrete condition.
Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of principle described in the utility model is not departed from, some improvements and modifications can also be made, these improvement
It also should be regarded as falling into the scope of protection of the utility model with retouching.
Claims (3)
1. a kind of Nitrogen dioxide testing instrument based on fluorescent nano material, including photodetector, display, microprocessor, electricity
Control switch, fluorescence nano reactor, suction pump and power supply, it is characterised in that
The microprocessor input connects the photodetector, and output end connects the display；The suction pump suction
Air containing finite concentration nitrogen dioxide, fluorescence nano reactor is contacted with nitrogen dioxide, cause fluorescence nano reactor
The fluorescent intensity sent changes；The data of the photodetector collection light source intensity change, the signal collected is passed
It is defeated by the microprocessor；The microprocessor is analyzed the data from the photodetector, by corresponding to light intensity
Content of nitrogen dioxide data are shown over the display；The power supply connects the photodetector, display and microprocessor respectively
Device is powered.
2. Nitrogen dioxide testing instrument according to claim 1, it is characterised in that electric-controlled switch is still further comprised, it is described
Electric-controlled switch connects the power supply, controls the break-make of power supply circuit.
3. Nitrogen dioxide testing instrument according to claim 1, it is characterised in that the photodetector is by light-inductive list
Member and signal processing unit composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720423641.7U CN206627444U (en) | 2017-04-21 | 2017-04-21 | A kind of Nitrogen dioxide testing instrument based on fluorescent nano material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720423641.7U CN206627444U (en) | 2017-04-21 | 2017-04-21 | A kind of Nitrogen dioxide testing instrument based on fluorescent nano material |
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| CN201720423641.7U Expired - Fee Related CN206627444U (en) | 2017-04-21 | 2017-04-21 | A kind of Nitrogen dioxide testing instrument based on fluorescent nano material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307693A (en) * | 2018-08-21 | 2019-02-05 | 电子科技大学 | A kind of detection NO2The method of gas |
-
2017
- 2017-04-21 CN CN201720423641.7U patent/CN206627444U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307693A (en) * | 2018-08-21 | 2019-02-05 | 电子科技大学 | A kind of detection NO2The method of gas |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171110 Termination date: 20190421 |
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| CF01 | Termination of patent right due to non-payment of annual fee |