CN108007890A - A kind of motor-vehicle tail-gas detection light beam reflection unit and detecting system - Google Patents
A kind of motor-vehicle tail-gas detection light beam reflection unit and detecting system Download PDFInfo
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- CN108007890A CN108007890A CN201710985027.4A CN201710985027A CN108007890A CN 108007890 A CN108007890 A CN 108007890A CN 201710985027 A CN201710985027 A CN 201710985027A CN 108007890 A CN108007890 A CN 108007890A
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- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 33
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims abstract description 10
- 238000004458 analytical method Methods 0.000 claims description 10
- 230000001133 acceleration Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 2
- 238000004566 IR spectroscopy Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 35
- 239000002245 particle Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 239000013618 particulate matter Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000003595 spectral effect Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 229910001632 barium fluoride Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003682 fluorination reaction Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012538 light obscuration Methods 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
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Classifications
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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
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- 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
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N2021/3595—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using FTIR
Abstract
The present invention relates to a kind of motor-vehicle tail-gas detection light beam reflection unit and detecting system.Motor-vehicle tail-gas detects light beam reflection unit, including upper reflector group and lower speculum group, the perpendicular arrangement of optical axis of speculum on the upper reflector group neighboring reflection circuit, the perpendicular arrangement of optical axis of speculum on the lower speculum group neighboring reflection circuit, light beam is after the upper reflector group and the reflection of lower speculum group in the broken line type trend that angle is right angle.Motor vehicle tail gas detection system, the system comprises Fourier Transform Infrared Spectrometer and foregoing light beam reflection unit, the Fourier Transform Infrared Spectrometer after the light beam reflection unit the reflected beams by detecting motor-vehicle tail-gas.The present invention makes the measurement of motor-vehicle tail-gas more accurate, and more economically, the scope of application is wider, so as to promote the application of measuring system and mode.
Description
Technical field
The present invention relates to tail gas telemetry system technical field, more particularly to a kind of motor-vehicle tail-gas detection light beam reflection dress
Put and detecting system.
Background technology
With being continuously increased for vehicle guaranteeding organic quantity, the influence of the discharge of motor-vehicle tail-gas to environment is increasing, and
As the promulgation of 6 years one inspection policies of motor vehicle, and indivedual automotive manufacturers carry out the row such as emission data fraud
For so that the drive test under practical operation situation is carried out to motor-vehicle tail-gas, is become very necessary.By to motor-vehicle tail-gas
Online drive test, can obtain the actual discharge situation of motor-vehicle tail-gas exactly, and the decision-making for policies such as driving restrictions provides
Data are supported and legal basis, meanwhile, provide law enforcement foundation to the road boundary detection of tail gas pollution of motor-driven vehicle.So as to be green hill
Clear water, escorts for people's health.
Motor-vehicle tail-gas controls to be defined in the country of discharge, provincial standard, and motor-vehicle tail-gas measurement component has：CO,
CO2, NO, SO2, NH3, CH (total hydrocarbon), parameter, these materials such as particle concentration can all cause human body, environment
Very big influence, so must be controlled by.
As shown in Figure 1, the existing detachable automobile tail gas telemetering equipment on portal frame, including it is placed on track
Top, which bridges, radiation source, detector, licence plate acquisition device and speed measuring device on portal frame and is placed on Road
The shockproof speculum in face.Radiation source and detector are placed in both sides above track, in being directed toward ground return mirror, radiation obliquely
The infrared and ultraviolet detection light that source is launched is retreaded by speculum transmitting is directed upwards towards detector, and light path is in V-shape, due to V words
Type light path is distributed in single track, so will not when remote sensing survey by a definite date is carried out to the motor vehicle of normally travel in multilane
Generation interferes with each other, particularly suitable for pollutant of vehicle exhaust concentration on the multilane to normally travel on major urban arterial highway
Measurement.
The prior art is using NDIR non dispersive infrared analyzer (NDIR) and non-dispersive uv analyzer (NDUV) come to more components
Gas analyzed.
But the prior art has the disadvantage that：Although V-type catoptric arrangement is very ingenious, its effective measurement section
Or it is narrow, when outside exhaust tube is in V-type reflection angle, just it is difficult to obtain accurate data.Meanwhile if portal frame
When height is higher, the angle of V-type reflection will be smaller, so as to cause effectively measurement to reduce.So also limit the program is having
The use for the road that oversize vehicle passes through.
Although the methods of NDIR, NDUV, cost was low, the component that can be measured is limited, the measurement of every kind of component be all by
The measurement that time sequencing carries out, rather than the measurement being carried out at the same time, in the calculating process for carrying out tail gas actual concentrations, it is necessary to
Approximately think that these components all measure at the same time, so component is more, caused by error it is bigger.In addition, these technologies
Can not all solve interference component influence, can not accuracy of judgement component, as long as there is interference component, can not just obtain correctly
As a result.And instrument is measured by light intensity in itself, so being as a result also easy to be subject to the influence of external condition and make precision
It is relatively low.
Analyzed using laser has higher precision in itself, but since the monochromaticjty of laser, a kind of laser can only be directed to
A kind of material measures, so when component is more, it is necessary to which multi-path laser measures, and infrared in generally using
Laser (such as quantum cascade laser), price is very high, and general single between 15-20 ten thousand, so results in multigroup part of survey
It is very high to measure cost, causes whole measuring system and method to be difficult to promote.
For above-mentioned shortcoming existing in the prior art, in order to greatly lift the net sectional area of measurement, make motor-driven
The measurement of tail gas is more accurate, more economically, so as to promote the application of measuring system and mode, is environmental protection, has
Necessity provides a kind of new technology of motor-vehicle tail-gas detection.
The content of the invention
In view of the above-mentioned problems, the present invention is intended to provide a kind of motor-vehicle tail-gas detection light beam reflection unit and detecting system,
To lift the net sectional area of motor vehicle emission measuring, make the measurement of motor-vehicle tail-gas more accurate, more economically, be applicable in model
Enclose wider.
The present invention provides a kind of motor-vehicle tail-gas detection light beam reflection unit, and described device includes upper reflector group with
Speculum group, the optical axis arrangement at an angle of the speculum on the upper reflector group neighboring reflection circuit, the lower speculum
The optical axis arrangement at an angle of speculum on group neighboring reflection circuit, light beam is through the upper reflector group and lower speculum group
Rectangular or " M " shape or X-shaped trend after reflection.
Above-mentioned device, the upper reflector group are installed on portal frame, and the lower speculum group is installed on ground.
Above-mentioned device, when the trend of the light beam is rectangle, the angle ranging from right angle；When the trend of the light beam
For " M " shape when, the angle ranging from 180 degree.
Above-mentioned device, each speculum of upper reflector group are located at same level height；The lower speculum group includes
Two groups of speculum groups for being located at differentiated levels, one of which speculum group send light beam, another group of speculum for reflection
Group is used to reflect Returning beam.
Above-mentioned device, the upper reflector group and lower speculum group are installed by fixing bracket.
Above-mentioned device, the upper reflector group and lower speculum group are equipped with sealing window.
The present invention also provides a kind of motor vehicle tail gas detection system, the system comprises Fourier Transform Infrared Spectrometer
With above-mentioned light beam reflection unit, after the Fourier Transform Infrared Spectrometer is by the light beam reflection unit the reflected beams
Detect motor-vehicle tail-gas.
Above-mentioned system, the system also includes beam expansion device, the beam expansion device is arranged in Fu
Between leaf transformation infrared spectrometer and the light beam reflection unit, for the Fourier Transform Infrared Spectrometer to be launched
Beam spread back reflection to the beam expansion device.
Above-mentioned system, the system also includes car plate and vehicle detection module, speed and acceleration analysis module are gentle
As parameters measurement module, it is mounted on portal frame.
Above-mentioned system, the system also includes data transmission module, its respectively with the Fourier transform infrared spectroscopy
Instrument, car plate and vehicle detection module, speed and acceleration analysis module are connected with meteorological parameters measurement module, for remotely passing
The defeated tail gas measured and state of motor vehicle data.
The present invention can greatly lift the net sectional area of measurement, the light of transmitting through light beam reflection unit multiple reflections,
It is distributed in a certain way on road, (number in figure is being not limited to) after multiple reflections, returns in spectrometer.No
The position of pipe motor vehicle exhaust funnel where, it is only necessary to the plume of diffusion can be diffused on any one place's light path section,
The concentration of each component in plume can be measured exactly.
The present invention use Fourier Transform Infrared Spectrometer, with spectral region is wide, signal-to-noise ratio is high, fast response time
Feature, can be quick, carries out the analysis of qualitative and quantitative while accurate to materials such as the gases of Multicomponent.
In short, the present invention makes the measurement of motor-vehicle tail-gas more accurate, more economically, the scope of application is wider, so as to
Promote the application of measuring system and mode.
Brief description of the drawings
Fig. 1 is the structure diagram of prior art tail gas telemetry system；
Fig. 2 is the vehicle emission measurement system structure diagram of the embodiment of the present invention；
Fig. 3 is beam spread principle schematic of the present invention；
Fig. 4 is reflector fixing structure schematic diagram of the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and examples, the embodiment of the present invention is described in more details, so as to energy
The advantages of enough more fully understanding the solution of the present invention and various aspects.However, specific embodiments described below and implementation
Example is for illustrative purposes only, rather than limitation of the present invention.
As shown in Fig. 2, the present embodiment detecting system is by Fourier Transform Infrared Spectrometer 1, beam expansion device 2, lower anti-
Penetrate microscope group 4, upper reflector group 5, car plate and vehicle detection module 6, speed and acceleration analysis module 7, meteorologic parameter measurement mould
The part such as block 8, portal frame 9 is formed, wherein 3 be road surface.Above-mentioned module is not that all must be provided with.In addition data can be also equipped with
Transport module, not shown in figure.
Motor-vehicle tail-gas detection light beam reflection unit in said system, described device include upper reflector group 5 and lower anti-
Penetrate microscope group 4, one angle of optical axis of the speculum on the 5 neighboring reflection circuit of upper reflector group, preferably perpendicular arrangement, institute
It is at an angle to state the optical axis of the speculum on lower 4 neighboring reflection circuit of speculum group, preferred vertical arrangement, light beam is through on described
Moved towards after speculum group 5 and the reflection of lower speculum group 4 in " M " shape or X-shaped, preferably rectangular trend.
When the trend of the light beam is rectangle, the angle between the optical axis of the speculum on upper neighboring reflection circuit is
Right angle；When the trend of the light beam is " M " shape, 180 degree the angle ranging from.Between lower speculum on neighboring reflection circuit
Angle is also such.
In the present embodiment, upper reflector group 5 is installed on portal frame, and lower speculum group 4 is installed on ground.
In the present embodiment, 5 each speculum of upper reflector group is located at same level height.Lower speculum group 4 may include two groups
Positioned at the speculum group of differentiated levels, one of which speculum group sends light beam for reflection, and another group of speculum group is used
In reflection Returning beam.For example light beam trend is arranged such easy to light beam return when be rectangle or " M " shape.
The principle of beam expansion device as shown in figure 3, the light beam emitted from spectrometer by beam expansion device
Amplification after, the effective area of light beam can significantly increase, so as to lift the effective range of measurement, improve sensitivity and measurement
Efficiency.It is shown in dotted line frame in Fig. 3, it is one group of lens.And in fact, can be obtained using sphere even non-spherical reflector
The optical efficiency of higher and the aberration of smaller.
Car plate and vehicle detection module 6, speed and acceleration analysis module 7 and meteorological parameters measurement module 8, are respectively mounted
In on portal frame 9.
The data transmission module of above-mentioned system, its respectively with Fourier Transform Infrared Spectrometer 1, car plate and the car
Type detection module 6, speed and acceleration analysis module 7 and meteorological parameters measurement module 8 connect, and are measured for remote transmission
Tail gas and state of motor vehicle data.
In the present embodiment, the infrared beam that Fourier Transform Infrared Spectrometer 1 is sent can be through beam expansion device 2 (as schemed
Shown in 3) extension after, the multiple reflections through lower speculum group 4 Yu upper reflector group 5, are distributed in ground 3 in a certain way
On, (it is being not limited to the number in figure) after multiple reflections, is returning in spectrometer.No matter the position of motor vehicle exhaust funnel exists
Where, it is only necessary to the plume of diffusion can be diffused on any one place's light path section, it is possible to measured exactly in plume
The concentration of each component.
Lower speculum group 4 is installed on below road surface, window is left on the light path of each vertical direction, and can be used
The sapphire window (high intensity, wear-resistant, hardness is only second to diamond in natural material) of anti-reflection film is coated with, will entirely be reflected
Microscope group seals, so as to protect speculum not to be subject to the influence of external environment change and cause to damage.
As shown in figure 4, using low thermal coefficient of expansion, the stent of one speculum group of steel overall processing of high intensity, makes
Speculum can be accurately fixed on stent, influenced from vibrations, temperature change etc..
Upper reflector group is similar with the structure of lower speculum group, but window can select more economic BaF2(fluorination
Barium) material.
The course of work of the present embodiment is：When motor vehicle will be by portal frame 9, speed and acceleration analysis module 7 with
Car plate and vehicle detection module 6 obtain the speed of vehicle, acceleration, license board information, vehicle etc., and when motor vehicle passes through dragon
Spectrometer collection module is triggered after door frame 9, tail gas is measured, analyzes gas composition and content, and it is dense to measure particulate matter
Degree.
Fourier Transform Infrared Spectrometer has very wide spectral region and very high resolution ratio, therefore can be by environment
In concentration all measure to come at the same time in the gas of sub- ppm ranks, therefore for Fourier Transform Infrared Spectrometer, energy
It is enough perfectly to solve the problems, such as that gas composition interference and the measurement of different components are asynchronous.And due to only needing an instrument with regard to energy
Whole parameters is analyzed, so cost is very low.Further, since in the measurements can be by entirely using Fourier Transform Infrared Spectrometer
Portion's gas, which is all measured, to be come, so when needing to upgrade the more components of measurement, it is possible to need not carry out any debugging to instrument
Or change, desired gas composition is only added in software, is shown.
General particle concentration analyzer uses the laser of Single wavelength, is measured by light obscuration or nephelometric turbidity unit dense
Degree.The characteristics of present invention makes full use of Fourier Transform Infrared Spectrometer spectral region wide measures.The basic principle of measurement
For：The scattering or blocking effect that the particulate matter of same particle size plays the light of different wave length are different, and wavelength is longer, scattering or resistance
Gear is fewer, and the infrared spectrum baseline that can thus to measure produces inclination, and the size of slope is related to particle concentration；
And actual particulate matter is the superposition of the particulate matter of different size particle diameter, the spectrum measured is also each particles things concentration
Superposition.So as to measure particle concentration by full wave spectrum, and since wave-length coverage is wide, high resolution, makes measurement
As a result automatically derived averagely, made result more accurate.
In short, the vehicle emission measurement system of the present invention utilizes Fourier Transform Infrared Spectrometer so that the present invention has spectrum
The characteristics of scope is wide, signal-to-noise ratio is high, fast response time, can be quick, while accurate to the materials such as the gas of Multicomponent into
The analysis of row qualitative and quantitative.
The present invention uses light beam reflection unit, can greatly lift the net sectional area of measurement, the light of transmitting is through light beam
Reflection unit multiple reflections, are distributed on road in a certain way, and (time in figure is being not limited to after multiple reflections
Number), return in spectrometer.No matter the position of motor vehicle exhaust funnel where, it is only necessary to the plume of diffusion can be diffused into
On any one place's light path section, it is possible to measure the concentration of each component in plume exactly.
The vertical survey structure of prior art V-type reflection, is subject to the puzzlement of height and v-angle and makes using receiving
Limitation, and the mode of speculum group proposed by the invention, can neatly (be not limited to shown in Fig. 2 in extension light beam path
4 tunnels) so that the precision higher of measurement, effective measured rate higher, and from the limitation of height.
In addition, the present invention integrates a variety of measurement modules, can more fully reaction end gas Measurement situation.
The present invention sets above-mentioned module to make the measurement of motor-vehicle tail-gas more accurate, and more economically, the scope of application is wider,
So as to promote the use of measuring system and mode.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and
Not to the restriction of embodiment.For those of ordinary skill in the field, on the basis of the above description can be with
Make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.And thus institute
Among the obvious changes or variations amplified out is still in protection scope of the present invention.
Claims (10)
1. a kind of motor-vehicle tail-gas detects light beam reflection unit, it is characterised in that described device includes upper reflector group and lower anti-
Penetrate microscope group, the optical axis arrangement at an angle of the speculum on the upper reflector group neighboring reflection circuit, the lower speculum group
The optical axis arrangement at an angle of speculum on neighboring reflection circuit, light beam are reflected through the upper reflector group and lower speculum group
Rectangular afterwards or " M " shape or X-shaped trend.
2. device according to claim 1, it is characterised in that the upper reflector group is installed on portal frame, under described
Speculum group is installed on ground.
3. device according to claim 1, it is characterised in that when the trend of the light beam is rectangle, the angle ranging from
Right angle；When the trend of the light beam is " M " shape, 180 degree the angle ranging from.
4. device according to claim 1, it is characterised in that each speculum of upper reflector group is located at same level height
Degree；The lower speculum group includes two groups of speculum groups for being located at differentiated levels, and one of which speculum group is used to reflect
Light beam is sent, another group of speculum group is used to reflect Returning beam.
5. device according to claim 1, it is characterised in that the upper reflector group and lower speculum group pass through fixation
Stent is installed.
6. device according to claim 1, it is characterised in that the upper reflector group and lower speculum group are equipped with sealing
Window.
7. a kind of motor vehicle tail gas detection system, it is characterised in that the system comprises Fourier Transform Infrared Spectrometer and power
Profit requires 1 to 6 any one of them light beam reflection unit, and the Fourier Transform Infrared Spectrometer is reflected by the light beam to be filled
Motor-vehicle tail-gas is detected after putting the reflected beams.
8. system according to claim 7, it is characterised in that the system also includes beam expansion device, the light beam
Expanding unit is arranged between the Fourier Transform Infrared Spectrometer and the light beam reflection unit, for by the Fourier
The beam spread back reflection that transform infrared spectroscopy instrument is launched is to the beam expansion device.
9. system according to claim 7, it is characterised in that the system also includes car plate and vehicle detection module, speed
Degree and acceleration analysis module and meteorological parameters measurement module, are mounted on portal frame.
10. system according to claim 9, it is characterised in that the system also includes data transmission module, its respectively with
The Fourier Transform Infrared Spectrometer, car plate and vehicle detection module, speed and acceleration analysis module and meteorologic parameter are surveyed
Measure module connection, the tail gas and state of motor vehicle data measured for remote transmission.
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| CN201710985027.4A CN108007890A (en) | 2017-10-20 | 2017-10-20 | A kind of motor-vehicle tail-gas detection light beam reflection unit and detecting system |
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| CN201710985027.4A CN108007890A (en) | 2017-10-20 | 2017-10-20 | A kind of motor-vehicle tail-gas detection light beam reflection unit and detecting system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593552A (en) * | 2018-05-14 | 2018-09-28 | 安徽九通久环保科技有限公司 | A kind of mobile pollution source on-line monitoring system |
| CN108663325A (en) * | 2018-06-19 | 2018-10-16 | 星禾环保科技有限公司 | A kind of reflector element of vehicle emission measurement system and vehicle emission measurement system |
| CN108760665A (en) * | 2018-06-04 | 2018-11-06 | 天津市圣威科技发展有限公司 | A kind of rectilinear motor-vehicle tail-gas remote sensing detection system |
| CN108922200A (en) * | 2018-05-14 | 2018-11-30 | 安徽九通久环保科技有限公司 | A kind of pollutant of vehicle exhaust device for fast detecting and method |
| CN114324095A (en) * | 2021-12-30 | 2022-04-12 | 中国石油大学(北京) | Monitoring device for concentration of particle impurities in gas pipeline |
| AT525195A1 (en) * | 2021-06-25 | 2023-01-15 | Avl List Gmbh | Measuring unit for measuring a gaseous or solid substance in a measuring volume |
| CN117129438A (en) * | 2023-08-29 | 2023-11-28 | 交通运输部公路科学研究所 | Vehicle flow emission pollutant detection method based on Fourier infrared telemetry array |
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