CN107727600A - A kind of THz wave conductivity type device and method for measuring trace gaseous organic substance - Google Patents
A kind of THz wave conductivity type device and method for measuring trace gaseous organic substance Download PDFInfo
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- CN107727600A CN107727600A CN201711131422.2A CN201711131422A CN107727600A CN 107727600 A CN107727600 A CN 107727600A CN 201711131422 A CN201711131422 A CN 201711131422A CN 107727600 A CN107727600 A CN 107727600A
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- 239000000126 substance Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005070 sampling Methods 0.000 claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 11
- 230000007613 environmental effect Effects 0.000 claims abstract description 9
- 230000035515 penetration Effects 0.000 claims abstract description 3
- 238000001228 spectrum Methods 0.000 claims description 21
- 230000035945 sensitivity Effects 0.000 claims description 11
- 230000003595 spectral effect Effects 0.000 claims description 10
- -1 polyethylene Polymers 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 8
- 238000000862 absorption spectrum Methods 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 6
- 229920000573 polyethylene Polymers 0.000 claims description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 238000004445 quantitative analysis Methods 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 claims description 3
- 239000008246 gaseous mixture Substances 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 238000000844 transformation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 11
- 230000006378 damage Effects 0.000 abstract description 2
- 238000009659 non-destructive testing Methods 0.000 abstract description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- RLBIQVVOMOPOHC-UHFFFAOYSA-N parathion-methyl Chemical group COP(=S)(OC)OC1=CC=C([N+]([O-])=O)C=C1 RLBIQVVOMOPOHC-UHFFFAOYSA-N 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 238000000295 emission spectrum Methods 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000010183 spectrum analysis Methods 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
- G01N21/3518—Devices using gas filter correlation techniques; Devices using gas pressure modulation techniques
-
- 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
- G01N21/3581—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using far infrared light; using Terahertz radiation
Abstract
The invention discloses a kind of THz wave conductivity type device and method for measuring trace gaseous organic substance, device includes thz laser transmitting terminal, thz laser receiving terminal and waveguide component, the waveguide component includes determinand sampling device, determinand goes out sampling device and waveguide, the determinand sampling device and determinand go out the different ends that sampling device is respectively arranged at waveguide, the light penetration waveguide front end hush panel of thz laser transmitting terminal transmitting is exposed to after caused absworption peak is superimposed over long distances inside waveguide on the gaseous organic substance to be measured of sampling device entrance, penetrated wave rear end of conduit hush panel to thz laser receiving terminal receives, realize the monitoring to Environmental Trace polluter.The present invention is low using the photon energy of THz wave, destruction will not be produced because of ionization and to detection material, so as to realize the Non-Destructive Testing to test substance.
Description
Technical field
The invention belongs to environmental monitoring technology field, and in particular to a kind of terahertz waveguide for measuring trace gaseous organic substance
Type device and method.
Background technology
The frequency of Terahertz (Terahertz, abbreviation THz) ripple is between far red light and microwave, in electromagnetic spectrum
Belong to the transition band of photonic propulsion and electronics frequency, be the ripple that last block is not researched and developed very well in electromagnetic wave
Section.Possesses special nature --- the high-penetration that other band spectrums do not have because of the specific position of electromagnetic spectrum where it
Property, low ionization energy, Fingerprint and coherence.THz wave is as a kind of unique radiated wave so that it is in material molecule
Peculiar spectrum information analysis, the nondestructive inspection of material and structure and three-dimensional chromatography, prohibited items anti-terrorism inspection, the work of biological tissue
Physical examination is looked into, high-precision secrecy radar, inter-satellite broadband connections and medical imaging etc. have been successful.Meanwhile
Because polluter is after THz wave irradiates, stronger absworption peak can be produced in specific frequency and forms characteristic fingerprint figure
Spectrum, thus Terahertz Technology will have broad application prospects in environmental monitoring.
At present, the method for the measurement trace gaseous contamination material in environment mainly includes gas chromatography, high-efficient liquid phase color
Spectrometry, mass spectral analysis and application of gas chromatorgraphy/mass method etc..Gas-chromatography has high separative efficiency, selectively good, high sensitivity, analyze speed
It hurry up, have a wide range of application, the shortcomings that not being suitable for higher boiling, difficult volatilization, the analysis of determination system of thermal unstable material but be present.High-efficient liquid phase color
Spectrum with high pressure, high speed, efficiently, high sensitivity higher boiling, thermally labile be organic and biochemical samples efficiently separate analysis method
The advantages of, but have that pillar is expensive, a large amount of solvents of consumption, and many solvents are harmful to human body.Mass spectral analysis has
Have a wide range of application, analyze speed is fast, and high sensitivity, resolution ratio is also higher, but expensive, and operating environment requirements are higher, to wide
General application brings certain limitation.In a word, the above method have the advantages that detection sensitivity it is high, selectivity good, high specificity, but
Its testing cost is more expensive, sample pretreatment process is complicated, the degree of specialization requirement to experiment condition is high, detection time is grown.
At this stage, the limit standard of Environmental noxious pollutant requires more and more stricter, thus possesses higher spirit
Sensitivity, resolution capability and jamproof ability, the analytical instrument or analysis skill of trace and ultra trace organic pollution can be monitored
Art turns into the trend of modern instrument development.It can be seen that the characteristic of the special finger-print of organic molecule is identified with THz wave
For foundation, using terahertz light spectral technology and Spectral Theory, carry out the detection research of trace gaseous contamination material, to explore
A kind of quick, practical, reliable persistent organism detection technique is very important.
The content of the invention
The present invention is in order to solve the above problems, it is proposed that a kind of THz wave conductivity type device for measuring trace gaseous organic substance
And method, the present invention can make full use of gaseous organic substance after THz wave irradiates, can in specific frequency produce compared with
Strong absworption peak, by the long range superposition of waveguide, it is final realize the low detection limits to Environmental Trace polluter,
High sensitivity is monitored, and new thinking is provided for application of the THz wave spectral technology in environmental monitoring.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of THz wave conductivity type device for measuring trace gaseous organic substance, including thz laser transmitting terminal, Terahertz
Laser pick-off end and waveguide component, the waveguide component includes determinand sampling device, determinand goes out sampling device and waveguide, institute
State determinand sampling device and determinand goes out the different ends that sampling device is respectively arranged at waveguide, thz laser transmitting terminal hair
The light penetration waveguide front end hush panel penetrated is exposed on the gaseous organic substance to be measured entered through determinand sampling device and produced
Absworption peak be superimposed over long distances inside the waveguide after, penetrated wave rear end of conduit hush panel to thz laser receiving terminal receives,
Gaseous organic substance to be detected enters waveguide through sampling device, completes to go out sampling device discharge through determinand after determining, realizes to ring
The monitoring of trace contamination material in border.
Further, the side that the determinand sampling device is connected with waveguide is less than its side away from waveguide,
Or/and the determinand goes out the side that sampling device is connected with waveguide and is less than its side away from waveguide.
Preferably, the determinand sampling device is inverted cone-shaped structure, makes the tera-hertz spectra that laser is launched most
Big degree is coupled into waveguide.
Preferably, it is inverted cone-shaped structure that the determinand, which goes out sampling device, is swashed beneficial to the light in waveguide by Terahertz
Optical receiving end receives.
Preferably, the side internal diameter that the inverted cone-shaped is connected with waveguide is less than the internal diameter of the side away from waveguide,
It is consistent with the internal diameter size of waveguide with the side internal diameter of waveguide connection.
The determinand, which goes out sampling device, waveguide and determinand sampling device, to be integrated, or can
The Split type structure of dismounting.
Preferably, waveguide front end hush panel and rear end hush panel are sealed using polyethylene or polytetrafluoroethylene (PTFE).
Preferably, screen pack, sampling pump and flowmeter are provided with the determinand sampling device, gas is passed through by sampling pump
Filter screen is entered in waveguide by gap-like duct.
Further, the thz laser emitter includes generating laser and collimater, and generating laser provides
0-2.7THz scopes THz wave, collimater by directional light convergence for point light.
Further, the thz laser receiving terminal includes Terahertz receiver, processor and collimater, and collimater will
The light collection that waveguide comes out to Terahertz receiver, processor connects Terahertz receiver.
Further, the waveguide is the tubular structure with certain length, preferably linear pattern or shaped form (example
It is such as snakelike).The material of waveguide is the metallic material, polyethylene or polytetrafluoro for having to tera-hertz spectra low absorption efficiency
Ethene etc., to reduce the loss of THz wave spectrum energy, improve device performance.
A kind of terahertz waveguide measuring method of trace gaseous organic substance, irradiated using gaseous organic substance by THz wave
Afterwards, stronger absworption peak can be produced in specific frequency, by the long range superposition of waveguide, realized to trace in environment
Measure low detection limits, the high sensitivity monitoring of polluter.
Further, frequency spectrum, absorption spectrum and spectrum of refractive index of the gaseous mixture in effective frequency range are obtained, really
Determine characteristic fingerprint pattern, capturing suitable principal component using least square method is analyzed, using dimensionality reduction thinking non-linear letter
Breath retains, and spectral mixture information is carried out into dimensionality reduction, finally realizes the quantitative analysis of test substance, draws standard curve, is established
Terahertz analysis method of the test substance in gas.
Compared with prior art, beneficial effects of the present invention are：
1) terahertz light spectral technology is applied in the monitoring of environmental area trace gas by the present invention.
2) compared to the investigative technique in research background, the present invention can make full use of terahertz light spectral technology to be based on optics
The trace gaseous organic substance that analytic approach is come in determination of the environment, the complicated adsorbing and trapping of atmosphere organic pollutant will be greatly shortened and carried
Take, purification process, reduce the consumption of the consumptive material such as a large amount of organic solvents in experiment.
3) monitoring of the present invention to the trace organic substance in environment has relatively low test limit and higher sensitivity.
4) present invention is low using the photon energy of THz wave, will not produce destruction because of ionization and to detection material, so as to
Realize the Non-Destructive Testing to test substance.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not form the improper restriction to the application.
Fig. 1 is a kind of THz wave conductivity type installation drawing for measuring trace gaseous organic substance.
Fig. 2 is the Terahertz absorption spectrum figure of parathion-methyl.
Fig. 3 is the Terahertz absorption spectrum figure of styrene.
Fig. 4 is the canonical plotting for determining styrene.
Wherein：1. Terahertz collimater；2. thz laser transmitter；3. polyethylene hush panel；4. determinand sample introduction fills
Put；5. waveguide assembly；6. determinand goes out sampling device；7. Terahertz receiver and processor；8. Terahertz collimater.
Embodiment：
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
In the present invention, term as " on ", " under ", "left", "right", "front", "rear", " vertical ", " level ", " side ",
The orientation or position relationship of instructions such as " bottoms " are based on orientation shown in the drawings or position relationship, only to facilitate describing this hair
Bright each part or component structure relation and the relative determined, not refer in particular to either component or element in the present invention, it is impossible to understand
For limitation of the present invention.
In the present invention, term such as " affixed ", " connected ", " connection " should be interpreted broadly, and expression can be fixedly connected,
Can also be integrally connected or be detachably connected；Can be joined directly together, can also be indirectly connected by intermediary.For
The related scientific research of this area or technical staff, the concrete meaning of above-mentioned term in the present invention can be determined as the case may be,
It is not considered as limiting the invention.
As background technology is introduced, prior art has high, good, high specificity of selectivity of detection sensitivity etc. excellent
Point, but its testing cost is more expensive, sample pretreatment process is complicated, the degree of specialization requirement to experiment condition is high, detection time
Long deficiency, in order to solve technical problem as above, present applicant proposes a kind of THz wave for measuring trace gaseous organic substance
Conductivity type device.
In a kind of typical embodiment of the application, as shown in figure 1, mainly including thz laser transmitter 2, terahertz
Hereby collimater 1 and Terahertz collimater 8, gas disengaging sample waveguide assembly 5, thz laser receiver and processor 7.The present invention
The Terahertz device of obtained measurement trace gaseous organic substance, makes full use of gaseous organic substance after THz wave irradiates, meeting
Stronger absworption peak is produced in specific frequency, by the long range superposition of waveguide, is finally realized to trace in environment
Measure low detection limits, the high sensitivity monitoring of polluter.
Thz laser emitter includes thz laser transmitter 2 and Terahertz collimater 1.Thz laser is launched
Directional light convergence is point light by the THz wave for the 0-2.7THz scopes that device 2 provides, Terahertz collimater 1.
Waveguide is that both ends are designed for inverted cone-shaped, the tera-hertz spectra that laser is launched at utmost is coupled into
Waveguide assembly 5.
Determinand sampling device 4 is located at the front end of waveguide.The inside of determinand sampling device 4 is provided with screen pack, sampling pump
And flowmeter.Gas is entered in waveguide by sampling pump through filter screen by gap-like duct.Determinand goes out sampling device 6 and is arranged on ripple
Thus the end of conduit, the gaseous organic substance for testing completion are located to discharge.
The external diameter of inverted cone-shaped and the ratio of internal diameter are 5:1, internal diameter size is consistent with intermediate tubular internal diameter size.
The material of waveguide is metal, polyethylene or polytetrafluoroethylene (PTFE) etc..
The inlet and outlet of waveguide both ends inverted cone-shaped are provided with polyethylene hush panel 3.
In embodiments of the invention, THz wave spectral limit selection 0-2.7THz, the conical outer diameter ruler in waveguide both ends
Very little is 5cm, and internal diameter 1cm, intermediate tubular internal diameter size is 1cm metal waveguide assembly 5.Determinand enters on waveguide assembly 5
The distance of sample mouth and outlet is 20cm, and the sample introduction speed of gaseous organic substance is 60mL/min, completes to enter next time every 2min
Sample.
It is the specific implementation case of the measurement device trace gas of the present invention below：
1) configuration 0.1L parathion-methyl concentration is respectively 1,2,4,6,8 and 10ug/L gas, is entered respectively through waveguide
Sample mouth enters in waveguide assembly 5.The emission spectrum scope for setting Terahertz frequency domain spectra instrument is 0-2.7THz, Terahertz receiver
7 obtain frequency spectrum, absorption spectrum and spectrum of refractive index of the gaseous mixture in effective frequency range, determine characteristic fingerprint pattern.
Then capture suitable principal component using least square method to be analyzed, nonlinear transformations are retained using dimensionality reduction thinking, will be mixed
Compound spectral information carries out dimensionality reduction, finally realizes the quantitative analysis of test substance, draws standard curve, establishes parathion-methyl and exist
Terahertz analysis method in gas.Wherein, the reason of parathion-methyl is calculated using Gaussian-view and Gaussian softwares
By absorption spectrum, as shown in Figure 2.Experimental result understands, the characteristic absorption peak of parathion-methyl in 0.58THz, standard curve
Relative coefficient r2More than 0.9.
Configuration 0.1L concentration of styrene is respectively 1,2,4,6,8 and 10ug/L gas, is entered respectively through waveguide injection port
Enter in waveguide assembly 5.The emission spectrum scope for setting Terahertz frequency domain spectra instrument is 0-2.7THz, and Terahertz receiver obtains gas
Frequency spectrum, absorption spectrum and spectrum of refractive index of the state mixture in effective frequency range, determine characteristic fingerprint pattern.Then use
Least square method captures suitable principal component and analyzed, and nonlinear transformations is retained using dimensionality reduction thinking, by spectral mixture
Information carries out dimensionality reduction, finally realizes the quantitative analysis of test substance, draws standard curve, establishes terahertz of the styrene in gas
Hereby analysis method.Experimental result understands the characteristic absorption peak of styrene in 1.2THz, the relative coefficient r of standard curve2It is more than
0.9。
The preferred embodiment of the application is the foregoing is only, is not limited to the application, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, model not is protected to the present invention
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deformation that creative work can make still within protection scope of the present invention.
Claims (10)
1. a kind of THz wave conductivity type device for measuring trace gaseous organic substance, it is characterized in that：Including thz laser transmitting terminal,
Thz laser receiving terminal and waveguide component, the waveguide component includes determinand sampling device, determinand goes out sampling device and ripple
Conduit, the determinand sampling device and determinand go out the different ends that sampling device is respectively arranged at waveguide, thz laser
It is organic that the light penetration waveguide front end hush panel of transmitting terminal transmitting exposes to the gaseous state to be measured entered through determinand sampling device
After caused absworption peak is superimposed over long distances inside waveguide on thing, penetrated wave rear end of conduit hush panel to thz laser receives
End receives, and realizes the monitoring to Environmental Trace polluter.
2. a kind of THz wave conductivity type device for measuring trace gaseous organic substance as claimed in claim 1, it is characterized in that：It is described
Determinand sampling device is inverted cone-shaped structure, the tera-hertz spectra that laser is launched at utmost is coupled into waveguide
Pipe.
3. a kind of THz wave conductivity type device for measuring trace gaseous organic substance as claimed in claim 2, it is characterized in that：It is described
It is inverted cone-shaped structure that determinand, which goes out sampling device, is received beneficial to the light in waveguide by thz laser receiving terminal.
4. a kind of THz wave conductivity type device for measuring trace gaseous organic substance as claimed in claim 1, it is characterized in that：It is described
Sealed using polyethylene or polytetrafluoroethylene (PTFE) the end of waveguide front-end and back-end.
5. a kind of THz wave conductivity type device for measuring trace gaseous organic substance as claimed in claim 1, it is characterized in that：It is described
Screen pack, sampling pump and flowmeter are provided with determinand sampling device, gas is entered by sampling pump through filter screen by gap-like duct
Enter into waveguide.
6. a kind of THz wave conductivity type device for measuring trace gaseous organic substance as claimed in claim 1, it is characterized in that：It is described
Thz laser emitter includes generating laser and collimater, the Terahertz for the 0-2.7THz scopes that generating laser provides
Directional light convergence is point light by ripple, collimater.
7. a kind of THz wave conductivity type device for measuring trace gaseous organic substance as claimed in claim 1, it is characterized in that：It is described
Thz laser receiving terminal includes Terahertz receiver, processor and collimater, the light collection that collimater comes out waveguide
To Terahertz receiver, processor connection Terahertz receiver.
8. a kind of THz wave conductivity type device for measuring trace gaseous organic substance as claimed in claim 1, it is characterized in that：It is described
Waveguide is the tubular structure with certain length, preferably linear pattern or shaped form.
9. a kind of terahertz waveguide measuring method of trace gaseous organic substance, it is characterized in that：Pass through terahertz using gaseous organic substance
After hereby ripple irradiation, stronger absworption peak can be produced in specific frequency, by the long range superposition of waveguide, realization pair
The low detection limits of Environmental Trace polluter, high sensitivity monitoring.
10. a kind of terahertz waveguide measuring method of trace gaseous organic substance as described in claim 9, it is characterized in that：Obtain
Frequency spectrum, absorption spectrum and spectrum of refractive index of the gaseous mixture in effective frequency range are taken, determines characteristic fingerprint pattern, is used
Least square method captures suitable principal component and analyzed, and nonlinear transformations is retained using dimensionality reduction thinking, by spectral mixture
Information carries out dimensionality reduction, finally realizes the quantitative analysis of test substance, draws standard curve, establishes the Terahertz analysis side of determinand
Method.
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| CN111678885A (en) * | 2020-05-29 | 2020-09-18 | 清华大学 | Chemical reaction observation system and method |
| CN112067576A (en) * | 2020-08-18 | 2020-12-11 | 上海理工大学 | Composite waveguide gas sensor based on hollow PMMA pipe |
| CN112526618A (en) * | 2020-11-19 | 2021-03-19 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Ionized layer tomography measuring instrument based on multi-band multi-constellation satellite signals and observation method thereof |
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| CN111678885A (en) * | 2020-05-29 | 2020-09-18 | 清华大学 | Chemical reaction observation system and method |
| CN112067576A (en) * | 2020-08-18 | 2020-12-11 | 上海理工大学 | Composite waveguide gas sensor based on hollow PMMA pipe |
| CN112067576B (en) * | 2020-08-18 | 2023-04-28 | 上海理工大学 | Composite waveguide gas sensor based on hollow PMMA (polymethyl methacrylate) tube |
| CN112526618A (en) * | 2020-11-19 | 2021-03-19 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Ionized layer tomography measuring instrument based on multi-band multi-constellation satellite signals and observation method thereof |
| CN112526618B (en) * | 2020-11-19 | 2023-06-23 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Ionospheric tomography measuring instrument based on multi-band multi-constellation satellite signals and observation method thereof |
| CN113008792A (en) * | 2021-03-01 | 2021-06-22 | 云南电网有限责任公司电力科学研究院 | Gas collecting device applied to terahertz detection |
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