CN106053376A - Gas pollutant detection device - Google Patents
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- 238000001514 detection method Methods 0.000 title claims abstract description 67
- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 19
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 28
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 239000012491 analyte Substances 0.000 claims description 35
- 238000011109 contamination Methods 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 18
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 6
- 238000007781 pre-processing Methods 0.000 claims description 6
- 238000012805 post-processing Methods 0.000 claims description 5
- 239000000284 extract Substances 0.000 claims description 4
- 238000005286 illumination Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 72
- 238000005516 engineering process Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004587 chromatography analysis Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000002329 infrared spectrum Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 1
- 239000000926 atmospheric chemistry Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000835 electrochemical detection Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000000411 transmission spectrum Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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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
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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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- Life Sciences & Earth Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention provides a gas pollutant detection device. The device comprises an infrared light source, an photoelectric detector, a light source control module, a signal processing module, and a controller; the infrared light source is used for emitting infrared light, and when the infrared light passes through a to-be-detected gas, light in partial frequency range is absorbed by the to-be-detected gas; the photoelectric detector is used for detecting emergent light after passing through the to-be-detected gas; the light source control module is used for controlling different frequencies of light emitting by the infrared light source; the signal processing module is used for processing an optical signal detected by the photoelectric detector; the controller is used for receiving a signal processed by the signal processing module, performing data processing of the signal and calculating the concentration of gas pollutants contained in the to-be-detected gas. The gas pollutant detection device provided by the invention not only can accurately detect the composition and concentration of the gas pollutants but also improves the portability; and on the other hand, the gas pollutant detection device also has excellent anti-seismic property, so the device can be widely applied in the field of gas pollutant detection.
Description
Technical field
The present invention relates to infrared spectrum detection field, in particular it relates to a kind of gaseous contamination analyte detection dress.
Background technology
Along with disobeying of modern industry, traffic, economic fast development, the over-exploitation of the energy and use and industrial tail gas
Rule discharge, PM2.5 remains high, and atmospheric pollution is on the rise, and serious harm mankind's activity is with healthy.These discharge flue dust and
Tail gas mixes in atmosphere, there occurs series of chemical, produces a lot of poisonous gas.Some gas such as NO2, SO2 etc.,
Although content in an atmosphere is the lowest, even less than 1/1000000th, but the health of the mankind and biology there is is long-term harm,
And easily environment structure polluted and threaten, as formed acid rain, global warming etc..Monitor the discharge of various polluter and big
The concentration of various gases in gas, real time record and monitoring gas change, it was predicted that atmospheric chemistry process and amblent air temperature change, urgently
Need a kind of simple, quick, stable high-precision gas detection device.
At present, gas detection technology can be divided into gas sensor technology, electrochemical gas detection technique, gas by measuring principle
Several big classes such as (as heat-conducted) gas detection technology of analysis of hplc technology, spectrum detection technique and other classifications.Wherein, gas
Body sensor technology is the detection technique of a kind of signal that measured information conversion becomes the signal of telecommunication or other form, this technology
Detection process is loaded down with trivial details, the poor selectivity to tested gas, is easily subject to the interference of foreign gas；Electrochemical gas detection technique is
A kind of analysis method set up based on electrochemical principle and the electrochemical properties of gas；Gas chromatographic analysis technique is a kind of thing
Reason separate analytical technique, realizes the detection of gas componant according to the difference of gas with various speed in the chromatography column.Electrochemical Detection
Technology and the artificial sample mode of gas chromatographic analysis technique many employings single-point type and it is necessary in lab analysis, analyze essence
Degree is often affected by operant skill；And it is only capable of detecting the gas of single composition every time, lack multiple input and signal processing
Function, during analysis, response speed is slow, and efficiency is low.Heat-conducted gas detection technique is the change by measuring thermal conductivity of mixture gas
Amount realizes the measurement of tested gas concentration, in this detection technique, the steam in tested gas and absorbability foreign gas
And their pressure and flowed fluctuation relatively big on testing result impact, measure process influenced by environmental temperature simultaneously, deposit
The highest in certainty of measurement, be difficult to the problems such as compensation.
In order to overcome above-mentioned problems, the spectrum detection technique of infrared band has detection speed, accurately because of it
Spend the advantages such as degree system high, immeasurable, shock resistance be good, and be gradually widely studied and applied.But, traditional spectral detection
Technology is made up of a series of circuit and optics, bulky, not antidetonation, not Portable belt, this greatly limits gas dirty
The range of dye thing monitoring device.
Summary of the invention
It is an object of the invention to provide a kind of equipment, this equipment can accurately measure the dusty gas composition in air and dirt
The concentration of dye gas, and this device volume is relatively small, it is simple to and carrying, its application is unrestricted, has the strongest suitability.
To achieve these goals, the present invention provides a kind of gaseous contamination analyte detection device, and this device includes: infrared light
Source, is used for sending infrared light, and the light that when described infrared light passes gas to be detected, component frequency is interval is by described gas to be detected
Absorb；Photoelectric detector, for detection through the emergent light after described gas to be detected, all can convert light signals into electricity
The device of signal all can be applicable to this, such as photodiode, and can also use multiple side by side to improve Detection results
Photoelectric detector is applied in combination, such as photodiode array, and the described signal of telecommunication can be current signal voltage signal；Light source control
Module, sends the light of different frequency for controlling infrared light supply；Signal processing module, for detecting described photoelectric detector
Optical signal process；Controller, for receiving the signal after described signal processing module processes, enters described signal
Row data calculate the concentration of the gas pollutant contained in described gas to be detected after processing.
The principle of the light of characteristic frequency in infrared spectrum can be absorbed, when described infrared light is through to be detected based on specific gas
After gas, the light of the characteristic frequency in its emergent light because the most partly or entirely being absorbed, its intensity can change, light electric-examination
Survey device to detect and after a series of process of signal processing module through the emergent light after gas to be detected, can pass through
Controller analyzes absorbed spectral frequency and absorbtivity, thus extracts composition and the/concentration information of dusty gas, and shows
Show on the display apparatus.
Preferably, described light source control module includes: modulation of source module, for the numeral control generating described controller
Signal processed is modulated；And driving module, described light source driver module includes digital to analog converter, for adjusting through described light source
Digital signal after the modulation of molding block is converted into the signal of telecommunication, thus drives described infrared light supply to send infrared light.Adjusted by light source
It is wider that the modulation of molding block can produce more frequency range, the more accurate light of frequency separation, thus improves detection degree of accuracy.
Preferably, described light source driver module is pulse constant current power supply.The clearance-type characteristics of power supply of pulse constant current power supply can
Reduce the luminous power consumption of infrared light supply.
Preferably, described controller generates PWM, and described PWM is modulated by described modulation of source module, to generate difference
The digital signal of frequency.
Preferably, described signal processing module includes: signal amplification module, described in photoelectric detector being detected
Emergent light signal is amplified processing；And signal pre-processing module, for filtering through described signal amplification module processing and amplifying
Described emergent light signal afterwards, removes unnecessary noise signal；Signal acquisition module, locates through described signal in advance for sampling
Described emergent light signal after the filtration of reason module；Signal post-processing module, for finally processing through described signals collecting mould
Described emergent light signal after block, and the optical signal after final process is passed to described controller, extract described to be detected
The composition of gas and/or concentration information.
Preferably, described infrared light supply is together with photo-detector package.
Preferably, described gaseous contamination analyte detection device includes optics, for entering the described emergent light received
Row light path processes, in order to photoelectric detector more effectively detects described emergent light.
Preferably, described infrared light supply and photoelectricity testing part and optics are arranged on solid memder, thus can
Improve anti-seismic performance.
Preferably, described optics is reflection unit, for changing the light path of described emergent light, makes described emergent light wear
Cross after described gas to be detected through this reflection unit reflected illumination at the receiving terminal of photoelectric detector, can further improve measurement essence
Degree, reduces the volume of described gas pollutant measurement apparatus.Described reflection unit can be reflecting mirror, or other has reflection merit
The device of energy.
Preferably, described optics is focusing arrangement, for entering the described emergent light through described gas to be detected
Line focusing, and the emergent light after focusing on feeds back to the receiving terminal of described photoelectric detector.Can be made by described focusing arrangement
Described emergent light is sufficiently irradiated with on photoelectric detector, improves detection efficiency and detection degree of accuracy.
By technique scheme, the gaseous contamination analyte detection device that the present invention provides overcomes transmission spectra detecting instrument
The shortcoming that the excessive inconvenience of volume is practical, improves the portability of described gaseous contamination analyte detection device, the most described gas
Pollutant testing apparatus has excellent anti-seismic performance, and therefore this device can be widely applied to gas pollutant detection field.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with following tool
Body embodiment is used for explaining the present invention together, but is not intended that limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the gaseous contamination analyte detection device according to embodiments of the invention one；
Fig. 2 is the structural representation of the gaseous contamination analyte detection device according to embodiments of the invention two；
Fig. 3 is the structural representation of the gaseous contamination analyte detection device according to embodiments of the invention three；And
Fig. 4 is the structural representation of the gaseous contamination analyte detection device according to embodiments of the invention four.
Description of reference numerals
10: controller 20: light source control module
21: modulation of source module 22: light source driver module
30: infrared light supply 40: photoelectric detector
50: signal processing module 51: signal amplification module
52: signal pre-processing module 53: signal acquisition module
54: signal post-processing module 60: reflection unit
61: focusing arrangement 70: display module
80: reflected light path 81: transmitted light path
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is described in detail.It should be appreciated that this place is retouched
The detailed description of the invention stated is merely to illustrate and explains the present invention, is not limited to the present invention.
Fig. 1 is the structural representation of the gaseous contamination analyte detection device according to embodiments of the invention one.As it is shown in figure 1,
Gaseous contamination analyte detection device of the present invention includes: infrared light supply 30, is used for sending infrared light, and described infrared light is through treating
The light that during detected gas, component frequency is interval is by described GAS ABSORPTION to be detected；Photoelectric detector 40, for detection through described
Emergent light after gas to be detected；Light source control module 20, sends the light of different frequency for controlling infrared light supply；At signal
Reason module 50, processes for the optical signal described photoelectric detector 40 being detected；Controller 10, for receiving through institute
State the signal after signal processing module 50 processes, calculate after described signal is carried out data process in described gas to be detected and contain
The concentration of some gas pollutants, the most described controller 10 can be microcontroller (MCU).
Fig. 2 is the structural representation of the gaseous contamination analyte detection device according to embodiments of the invention two.As in figure 2 it is shown,
As a kind of preferred embodiment, described light source control module 20 may include that modulation of source module 21, for described control
The digital controlled signal that device 10 processed generates is modulated；And driving module 22, described light source driver module 22 includes that digital-to-analogue turns
Parallel operation, for the digital signal after described modulation of source module 21 is modulated is converted into the signal of telecommunication, thus drives described infrared
Light source 20 sends infrared light.
Preferably, described light source driver module 22 is pulse constant current power supply.Because in practice, some can be in infrared light supply
The power consumption of device excessive, thermal losses can be produced when long-time use, when using pulse constant current power supply, pulse power clearance-type
The performance of power supply can reduce power consumption.
Preferably, described controller 10 generates PWM, and described PWM is modulated by described modulation of source module, to generate not
The digital signal of same frequency.The intensity of the light that described infrared light supply sends can be controlled by the amplitude controlling DAC.
Embodiment two shown in Fig. 2 further comprises a kind of preferred implementation of described signal processing module 50.Such as Fig. 2 institute
Showing, described signal processing module 50 can also include: signal amplification module 51, described in photoelectric detector 40 being detected
Emergent light signal is amplified processing, and the most described signal amplification module can be voltage-type operational amplifier；And signal is pre-
Processing module 52, for filtering the described emergent light signal after described signal amplification module 51 processing and amplifying, removal need not
The noise signal wanted；Signal acquisition module 53, for the sampling described outgoing after the filtration of described signal pre-processing module 52
Optical signal, such as signal acquisition module can be analog-digital converters；Signal post-processing module 54, for finally processing through described
Described emergent light signal after signal acquisition module 53, and the optical signal after final process is passed to described controller
40, extract composition and/or the concentration information of described gas to be detected, such as signal post-processing module can be programmable gate array
Or digital signal processor carries out signal processing (FPGA).
Preferably, described infrared light supply 30 and photoelectric detector 40 are packaged together, thus can effectively prevent because of the two it
Between position occur skew to cause photoelectric detector not receive the emergent light through gas to be measured, improve anti-seismic performance.
May also include display module 70 at the present embodiment two, can be used for showing gas pollutant in gas to be detected
Composition and concentration information.In actual application, can be arranged by described display module 70 and need the frequency of infrared light, make described gas
Pollutant testing apparatus is for specific gas repeated measurement, or sets range of scanned frequencies, makes described gaseous contamination analyte detection fill
Put repeated measurement in predetermined frequency range.
Fig. 3 and Fig. 4 is the structural representation of the other two kinds of embodiments according to the present invention respectively, as shown in Figure 3 and Figure 4,
On the basis of the enforcement two described in Fig. 2, the gaseous contamination analyte detection device in embodiment two is done by embodiment three and enforcement four
Further improvement, this two kinds of embodiments also include optics on the basis of implementing two, for the institute received
State emergent light and carry out light path process, in order to photoelectric detector more effectively detects described emergent light.
Preferably, described infrared light supply 30 and photoelectric detector 40 and optics are arranged on solid memder.
Explanation embodiment three and concrete improvement project and the effect thereof implementing four separately below.
Fig. 3 is the structural representation of the gaseous contamination analyte detection device according to embodiments of the invention three.As it is shown on figure 3,
Optics in described improvement project is reflection unit 60, for changing the light path of described emergent light, makes described emergent light wear
Cross after described gas to be detected through this reflection unit reflected illumination at the receiving terminal of photoelectric detector 40.Described reflection unit 60 can
To be reflecting mirror, it is also possible to be any other device having reflecting effect or device.
When described gaseous contamination analyte detection device includes reflection unit 60, as shown in reflected light path 81 in Fig. 3, described red
The infrared light that outer light source 30 sends is radiated on reflection unit 60, the most again behind the space at gas place to be detected
Being received by photoelectric detector 40 after gas to be detected, in described reflected light path 81, infrared light twice is through gas to be detected
Body such that it is able to improve the accuracy of detection to gas pollutant, though the most minimal amount of dusty gas, described pollutant
Detection device also can accurately detect out composition and the concentration of described dusty gas.Meanwhile, because of accurate to the detection of dusty gas
Degree significantly improves, under making described gaseous contamination analyte detection device can replace before not reducing power of test, reduce infrared light supply and
Physical separation between photoelectric detector, thus the volume of described gaseous contamination analyte detection device can be made smaller and more exquisite.
In practice, described infrared light supply 30, reflection unit 60, photoelectric detector 40 can be encapsulated on single component,
Making this three or will not offset relative to position between the two therein because of extraneous impact, impact detects performance, thus
The volume of described gaseous contamination analyte detection device can not only be reduced further, moreover it is possible to effectively promote the anti-seismic performance of this device.
Fig. 4 is the structural representation of the gaseous contamination analyte detection device according to embodiments of the invention four.As shown in Figure 4,
Described optics is focusing arrangement 61, for the described emergent light through described gas to be detected is focused, and will be poly-
Emergent light after Jiao feeds back to the receiving terminal of described photoelectric detector 40.Described focusing arrangement 61 can be lens, certainly,
In practice, any device that can penetrate convergence effect of light in fact is all applied to herein, such as angle mirror.Such as transmitted light path 82 in Fig. 4
Shown in, utilize described focusing arrangement 61 that described infrared light can be made to be radiated at after fully focusing on through the emergent light after gas to be detected
On described photoelectric detector 40, it is thus possible to reduce because divergence of beam causes described photoelectric detector can not fully receive through to be checked
Survey the infrared light after gas, improve the detection degree of accuracy of described gaseous contamination analyte detection device.
In practice, described infrared light supply 30, focusing arrangement 61, photoelectric detector 40 can be encapsulated on single component,
Making this three or will not offset relative to position between the two therein because of extraneous impact, impact detects performance, thus
The volume of described gaseous contamination analyte detection device can not only be reduced further, moreover it is possible to effectively promote its anti-seismic performance.
In other embodiments of the invention, it is also possible to be arranged as required to multiple described reflection unit or described focusing dress
Put, it is also possible to by described reflecting properties and described focusing arrangement connected applications, thus the feature performance benefit of comprehensive both devices enters
One step improves detection performance.The design of the embodiment recorded with the invention described above in view of these embodiments is identical, at this not
Go to live in the household of one's in-laws on getting married again and chat.
Additionally, in the actual application of the present invention, gas to be detected can be contained in sample cell and be placed in described pollution
Gas-detecting device detects, it is possible to so that the transparent tube that there is gas to be measured inside is placed in, described gaseous contamination analyte detection
The test side of device, i.e. includes the component of infrared light supply and photoelectric detector and/or optical device, thus detects.Therefore
Gaseous contamination analyte detection device of the present invention can be applied not only to detect the gas pollutant in air, it is also possible to is used for
Need the industrial circle monitored about gas componant and concentration thereof.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality
Execute the detail in mode, in the technology concept of the present invention, technical scheme can be carried out multiple letter
Monotropic type, these simple variant belong to protection scope of the present invention.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, at not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to various can
The compound mode of energy illustrates the most separately.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as it is without prejudice to this
The thought of invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a gaseous contamination analyte detection device, it is characterised in that this device includes:
Infrared light supply, is used for sending infrared light, and described infrared light is described through the light that component frequency during gas to be detected is interval
GAS ABSORPTION to be detected；
Photoelectric detector, for detecting the emergent light after described gas to be detected；
Light source control module, sends the light of different frequency for controlling infrared light supply；
Signal processing module, processes for the optical signal described photoelectric detector being detected；
Controller, for receiving the signal after described signal processing module processes, after described signal is carried out data process
Calculate the concentration of the gas pollutant contained in described gas to be detected.
Gaseous contamination analyte detection device the most according to claim 1, it is characterised in that described light source control module includes:
Modulation of source module, is modulated for the digital controlled signal generating described controller；And
Light source driver module, described light source driver module includes digital to analog converter, for modulating through described modulation of source module
After digital signal be converted into the signal of telecommunication, thus drive described infrared light supply to send infrared light.
Gaseous contamination analyte detection device the most according to claim 2, it is characterised in that described light source driver module is pulse
Constant current source.
Gaseous contamination analyte detection device the most according to claim 2, it is characterised in that described controller generates PWM, described
Described PWM is modulated by modulation of source module, to generate the digital signal of different frequency.
Gaseous contamination analyte detection device the most according to claim 1, it is characterised in that described signal processing module includes:
Signal amplification module, the described emergent light signal for photoelectric detector being detected is amplified processing；And
Signal pre-processing module, for filtering the described emergent light signal after described signal amplification module processing and amplifying, goes
Except unnecessary noise signal；
Signal acquisition module, for the sampling described emergent light signal after the filtration of described signal pre-processing module；
Signal post-processing module, for finally processing the described emergent light signal after described signal acquisition module, and will be through
Optical signal after final process passes to described controller, extracts composition and/or the concentration information of described gas to be detected.
Gaseous contamination analyte detection device the most as described in any of claims 1, it is characterised in that described infrared light supply and light
Photodetector is packaged together.
7. according to the gaseous contamination analyte detection device described in any one in claim 1 to 6, it is characterised in that described gas
Pollutant testing apparatus includes optics, for the described emergent light received is carried out light path process, in order to light electric-examination
Survey device and more effectively detect described emergent light.
8. gaseous contamination analyte detection device as claimed in claim 7, it is characterised in that described infrared light supply and photoelectric detector
Part and optics are arranged on solid memder.
9. gaseous contamination analyte detection device as claimed in claim 7, it is characterised in that described optics is reflection unit,
For changing the light path of described emergent light, make described emergent light through after described gas to be detected through this reflection unit reflected illumination
Receiving terminal at photoelectric detector.
10. gaseous contamination analyte detection device as claimed in claim 7, it is characterised in that described optics is focusing arrangement,
For the described emergent light through described gas to be detected is focused, and will focus on after emergent light feed back to described light
The receiving terminal of photodetector.
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| CN201610675831.8A CN106053376A (en) | 2016-08-16 | 2016-08-16 | Gas pollutant detection device |
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| CN201610675831.8A CN106053376A (en) | 2016-08-16 | 2016-08-16 | Gas pollutant detection device |
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Cited By (4)
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| CN106645025A (en) * | 2016-12-27 | 2017-05-10 | 吉林大学 | Online detector for automobile exhaust component content |
| CN109612965A (en) * | 2018-12-25 | 2019-04-12 | 杭州电子科技大学 | The miniaturization gas-detecting device and detection system of many kinds of parameters compensation |
| CN111044485A (en) * | 2019-12-04 | 2020-04-21 | 清华大学合肥公共安全研究院 | Tunable laser absorption harmonic demodulation circuit and method based on FPGA (field programmable Gate array) synchronous signals |
| US10768135B2 (en) | 2017-12-27 | 2020-09-08 | Industrial Technology Research Institute | Oxidizing gas detection method and apparatus thereof |
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