CN209027988U - A kind of infrared gas sensor with temperature control system - Google Patents
A kind of infrared gas sensor with temperature control system Download PDFInfo
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- CN209027988U CN209027988U CN201821734979.5U CN201821734979U CN209027988U CN 209027988 U CN209027988 U CN 209027988U CN 201821734979 U CN201821734979 U CN 201821734979U CN 209027988 U CN209027988 U CN 209027988U
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- temperature control
- control system
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- infrared
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Abstract
The utility model relates to a kind of infrared gas sensors with temperature control system, including temperature control system, reflective sampling gas chamber, electrical modulation infrared light supply, four integrated detectors, signal processing module, microprocessing systems module, concentration display unit, LoRa wireless communication module；The signal processing module includes signal amplification module, signal filtering and noise reduction module and A/D conversion module；The microprocessing systems rear end is connected with concentration display unit and LoRa wireless communication module；The temperature control system includes temperature controlled compartment, and the gas chamber of setting sampling wherein.The utility model is able to achieve the infrared-gas sensing device to four kinds of greenhouse gases (methane, carbon dioxide, nitrous oxide, sulfur hexafluoride) while detection, and includes the temperature control system for being suitable for winter and working at night, novel reflective gas chamber.
Description
Technical field
The utility model relates to infrared-gas sensory fields, and in particular to a kind of infrared-gas sensing with temperature control system
Device.
Background technique
Greenhouse gases refer to the solar radiation that ground return can be absorbed in atmosphere, and re-emit some gas of radiation
Body.Their effect is that earth surface is made to become warmer, be similar to greenhouse retain solar radiation, and in heating greenhouse air work
With.Since these greenhouse gases have the permeability of height to the visible light from solar radiation, and the earth is reflected
Long-wave radiation has the absorbability of height, can absorb the infrared ray in terrestrial surface radiation strongly, that is, " greenhouse effects " often said
Lead to global warming.The consequence of global warming can be such that Global Precipitation amount redistributes, glacier and frozen soil ablation, sea level
Rise etc., had both endangered the balance of natural ecosystems, more threaten the food supply and living environment of the mankind.Therefore, to greenhouse gas
The monitoring analysis of body is of great significance.
6 kinds of greenhouse gases of control are provided in Kyodo Protocol book are as follows: carbon dioxide (CO2), methane (CH4), nitrous oxide
(N2O), hydrofluorocarbons (HFCs), perfluorocarbon compound (PFCs), sulfur hexafluoride (SF6).The important meaning of Greenhouse
Justice is exactly to measure the concentration variation of these components in atmosphere, assesses their radiation effect.With we known to air quality prison
Survey is compared, and the monitoring of greenhouse gases is also required to a set of corresponding codes and standards.Monitoring to greenhouse gases mainly includes emission source
With the monitoring of background concn.Monitoring greenhouse gases do not need many times to re-establish observation point, in existing air quality monitoring
Monitoring point on can apply monitoring to greenhouse gas concentration completely.Currently used mainly gas chromatography, additionally
There is optical cavity ring-down method, by gas to the difference of infrared ray absorbing, collects and surveys the concentration data of greenhouse gases.Last century 80
At the beginning of age, the country begins to use infrared gas analysis method, and with the development of electronic technology, infrared gas sensor starts to use
Electrical modulation light source, new detector and low-power scm system, so that sensing device has, selectivity is good, stability is high, clever
The advantages that sensitivity is high, detection is quick.
In recent years, non-dispersive infrared (NDIR) gas detection technology is rapidly developed, but there are still many deficiencies.It is first
First, in existing scheme, infrared gas sensor sampling gas chamber generallys use direct-injection type design, in order to meet the light path of gasmetry
It is required that generally requiring to increase air chamber length, while multiple detectors during measurement of multi-components, in direct-injection type gas chamber side by side
It will increase gas chamber diameter, cause entire sensing device volume to increase, be unfavorable for instrument miniaturization.Secondly, presently, there are it is infrared
Most of sensor can only test a kind of gas, and the monitoring needs of greenhouse gases simultaneously detect multiple gases, therefore,
Existing sensing device is unable to satisfy demand.Third, can be by learning calibrating gas state equation PV=nRT analysis, temperature
Degree factor has a significant impact to gas concentration detection process, and the monitoring of greenhouse gases is usually at outdoor progress, winter and night
Between temperature variation, at infrared-gas sensing device problem to be solved.
Utility model content
In order to solve defect existing in the prior art, the utility model provides one kind and is able to achieve to four kinds of greenhouse gases
The infrared-gas sensing device that (methane, carbon dioxide, nitrous oxide, sulfur hexafluoride) detects simultaneously, and include to be suitable for winter
And temperature control system, the novel reflective gas chamber worked at night.
To achieve the above object, technical solution provided by the utility model is:
A kind of infrared gas sensor with temperature control system, including temperature control system, reflective sampling gas chamber, electrical modulation are red
Outer light source, four integrated detectors, signal processing module, microprocessing systems module, concentration display unit, LoRa wireless telecommunications mould
Block；The signal processing module includes signal amplification module, signal filtering and noise reduction module and A/D conversion module；The micro process
System Back-end is connected with concentration display unit and LoRa wireless communication module；The temperature control system includes temperature controlled compartment, and is set wherein
Sampling gas chamber is set, there are two openings for the temperature controlled compartment upper end setting, for sampling the entrance and discharge of gas chamber gas；The sampling
It is provided with air inlet on the left of gas chamber upper end, is provided with gas outlet on the right side of upper end, the sampling gas chamber is by left and right two chambers group
At, two chambers all at semi-ellipsoid shape, and it is full symmetric, intermediate stitching portion is provided with electrical modulation light source, in left chamber coke
There are two integrated detectors for setting at, symmetrical with left chamber, and right chamber focal point is also provided with to be detected there are two integrated
Device.
Further, the LoRa wireless communication module completes the information exchange of infrared-gas sensing device and PC machine.
Further, there are certain gap, centre addition heat-barrier materials between the temperature control chamber interior walls and outer wall.
Further, there are four resistive heater, a temperature sensor, the micro process systems for dress inside the temperature controlled compartment
System receives the signal of temperature sensor, is simultaneously emitted by instruction, cooperation resistive heater work.
Further, temperature sensor and resistive heater cooperate for reducing temperature change to the shadow of gas detection
It rings.
Further, electrical modulation light source issue infrared light through over-sampling gas chamber upper surface with left and right sides inner wall through reflecting
After be received by a detector.
Further, four integrated detectors are respectively used to methane, carbon dioxide, nitrous oxide, sulfur hexafluoride gas
Detection, each integrated detector have independent Measurement channel and reference channel, it is ensured that the failure of an integrated detector will not
Influence the normal work of other integrated detectors.
Further, the sampling gas chamber inner wall carries out the gold-plated processing of brass, makes the smooth enough of inner wall, reduces infrared light
Loss in reflection.
Further, the sampling gas chamber is modeled using SolidWorks, and is beaten using relatively advanced 3D printing technique
Print is made, and printed material selects high performance class ABS resin material.The sampling gas chamber SolidWorks modeling after,
It imports LightTools optical simulation software and carries out optical path emulation, find, determine gas chamber optimized parameter.
The utility model has the advantages that
1. the utility model introduces reference channel on the corresponding detector of every kind of gas detection, can be to a certain extent
Measurement interference caused by the extraneous factors such as environmental change and light source shake is eliminated, gasmetry precision is improved；Meanwhile it is each integrated
Detector all has independent Measurement channel and reference channel, this, which is designed, can guarantee that the failure of an integrated detector will not influence it
The normal work of his integrated detector.
2. the utility model devises a kind of temperature control system, sampling gas chamber is placed in temperature controlled compartment, while the temperature control system
Include temperature sensor and resistive heater, be used cooperatively, the variation of winter and nocturnal temperature can be reduced to gas detection
Influence.
3. the utility model devises novel sampling gas chamber, 2 secondary reflections of optical path may be implemented, it can be in certain gas chamber
In space, effectively extends light path, and control chamber volume, be conducive to the miniaturization of entire sensing device；Meanwhile gas chamber or so two
Chamber design is full symmetric, therefore optical path is full symmetric, it is ensured that in the measurement of four component gas, corresponding to gas with various
Optical path is full symmetric.
4. SolidWorks modeling can be used in the utility model, and using relatively advanced 3D printing technique printing and making and
At printed material selects high performance class ABS resin material；The material is with cheap, accurate to dimension is high, surface light
Sliding, the advantages that assembling is good, resistance to deformation, be conducive to improve the accuracy of optical system and the detection accuracy of sensor entirety；Together
When the material also there is acidproof corrosion resistant characteristic, the corrosive gas ingredient under test gas can be effectively prevented to gas chamber
Destruction；The model that SolidWorks is established imports LightTools optical simulation software, carries out optical path emulation, determines gas chamber
Optimized parameter improves the accuracy of sensor measurement concentration.
5. the utility model is provided with concentration display unit, live reading gas concentration information in real time can be convenient.In addition
, be additionally provided with LoRa wireless communication module, its main feature is that under same consumption conditions than other wireless modes propagate away from
From farther, low-power consumption and unified at a distance is realized, staff can be allowed not have to arrival scene can read gas in real time
Concentration information.
Detailed description of the invention
Fig. 1 is the temperature control system structure chart of the utility model.
Fig. 2 is the sampling air chamber structure figure of the utility model.
Fig. 3 is the utility model integrated detector design diagram.
Fig. 4 is the utility model signal processing system schematic diagram.
In figure, 1- temperature controlled compartment opening A, 2- temperature controlled compartment, 3- heat-barrier material, 4- temperature controlled compartment opening B, 5- temperature sensor, 6-
Resistive heater, 7- sample air inlet of air chamber, 8- gas molecule, and 9- samples gas chamber, and 10- samples gas chamber gas outlet, and 11- optical path is logical
Road, 12- methane integrated detector, 13- carbon dioxide integrated detector, 14- electrical modulation infrared light supply, 15- nitrous oxide are integrated
Detector, 16- sulfur hexafluoride integrated detector, the optical filter that 3.3 μm of 17- central wavelength, the optical filter that 9 μm of 18- central wavelength,
The optical filter that 4.26 μm of 19- central wavelength, the optical filter that 4.69 μm of 20- central wavelength, the optical filtering that 10.55 μm of 21- central wavelength
Piece.
Specific embodiment
The utility model is described in further detail combined with specific embodiments below.
As shown in Figure 1, being the temperature control system of the utility model, wherein there are two openings: temperature control for the upper end setting of temperature controlled compartment
Room opening A1, temperature controlled compartment opening B 4, after sampling gas chamber 9 is put into temperature controlled compartment 2, two openings are respectively used to sampling 9 gas of gas chamber
Entrance and discharge.Heat-barrier material 3 is added among the temperature controlled compartment 2, there are four resistive heater 6 and one for dress inside temperature controlled compartment
Temperature sensor 5.Temperature sensor 5 is connected with rear end microprocessing systems, when winter or nighttime temperature decline, micro process
Device receives the signal of temperature sensor 5, is simultaneously emitted by instruction, and resistive heater 6 is started to work, and can reduce the variation of temperature to gas
The influence that physical examination is surveyed.
In conjunction with Fig. 2, gas enters sampling gas chamber by sampling air inlet of air chamber 7.Sampling air inlet of air chamber 7 is set to sampling gas
Chamber upper wall left end, sampling gas chamber gas outlet 10 are set to sampling gas chamber upper wall right end, and gas is discharged after entire gas chamber.
The sampling gas chamber 9 is made of left and right two chambers, and two chambers are all at semi-ellipsoid shape, and full symmetric, intermediate stitching portion
It is provided with electrical modulation light source 14.The radiation scope of infrared light supply can meet methane, carbon dioxide, oxygen at 2 μm -16 μm simultaneously
Change the testing requirements of four kinds of sub- nitrogen, sulfur hexafluoride gas.Chamber (ellipsoid) focal point in left side is provided with the integrated spy of nitrous oxide
Device 15 is surveyed, sulfur hexafluoride integrated detector 16 is symmetrical with left chamber, right chamber placement methane integrated detector 12, and two
Carbonoxide integrated detector 13.According to optical principle, the infrared light that electrical modulation light source 14 issues is by gas chamber upper surface and a left side
It is all received by four integrated detectors after the reflection of right side inner wall.
9 or so two chamber design of sampling gas chamber is full symmetric, therefore optical path is full symmetric, it is ensured that in four component gas
In the measurement of body, optical path corresponding to gas with various is full symmetric.
The sampling gas chamber 9 is modeled using SolidWorks, and using relatively advanced 3D printing technique printing and making and
At printed material selects high performance class ABS resin material.The sampling gas chamber inner wall carries out the gold-plated processing of brass, in guarantee
The smooth enough of wall reduces the loss in infrared light reflection.
It is imitative to import LightTools optical simulation software progress optical path after SolidWorks modeling for the sampling gas chamber 9
Very, it finds, determine gas chamber optimized parameter.
It is that the detector of the utility model designs shown in Fig. 3, respectively methane integrated detector 12 from left to right, dioxy
Change carbon integrated detector 13, nitrous oxide integrated detector 15, sulfur hexafluoride integrated detector 16.Two are provided on each detector
Block optical filter, the optical filter 17 that 3.3 μm of central wavelength are used for methane detection, and the optical filter 19 that 4.26 μm of central wavelength is used for dioxy
Change the detection of carbon, the optical filter 20 that 4.69 μm of central wavelength is used for the detection of nitrous oxide, the optical filter that 10.55 μm of central wavelength
21 are used for the detection of sulfur hexafluoride.It is provided with the optical filter 18 for 9 μm of center wavelength on each detector simultaneously, is used for reference channel
Data.Each integrated detector all has independent Measurement channel and reference channel, guarantees that the failure of an integrated detector will not
Influence the normal work of other integrated detectors.
The electrical modulation infrared light supply 14, four integrated detectors, temperature sensors 5 are all connected with signal processing system
It connects, completes follow-up work by microprocessing systems.
As shown in figure 4, being the signal processing system of sensor.Light source driving circuit described in the system receives modulation letter
Number, infrared light supply 14 is modulated with the square-wave pulse of 2Hz frequency.Infrared light is received after gas absorbs by four integrated detectors,
Detector exports electric signal to signal processing system simultaneously.Electric signal amplifies by signal, filters, after A/D conversion, is transmitted to micro-
Processor, microprocessing systems handle electric signal, and obtain corresponding gas concentration information, and microprocessor rear end is connected with concentration and shows mould
Block and LoRa wireless communication module.In addition, microprocessing systems are connected with the temperature sensor 5 in temperature control system, receive temperature and pass
The signal of sensor 5, is simultaneously emitted by instruction, and cooperation resistive heater 6 works.
The concentration display module can be convenient monitoring field and read gas concentration information in real time.The LoRa channel radio
The information exchange that module completes infrared-gas sensing device and PC machine is interrogated, staff can be allowed not have to arrival scene can be real-time
Read gas concentration information.
The above is only the preferred embodiment of the utility model, not makees limit in any form to the utility model
System, any person skilled in the art are not departing within the scope of technical solutions of the utility model, according to the utility model
Technical spirit, any simple modifications, equivalent substitutions and improvements to the above embodiments etc., still falls within the utility model
Within the protection scope of technical solution.
Claims (7)
1. a kind of infrared gas sensor with temperature control system, it is characterised in that: including temperature control system, reflective sampling gas
Room, electrical modulation infrared light supply, four integrated detectors, signal processing module, microprocessing systems module, concentration display unit,
LoRa wireless communication module；The signal processing module includes signal amplification module, signal filtering and noise reduction module and A/D modulus of conversion
Block；The microprocessing systems rear end is connected with concentration display unit and LoRa wireless communication module；The temperature control system includes temperature control
Room, and the gas chamber of setting sampling wherein, temperature controlled compartment upper end setting there are two opening, for sample the entrance of gas chamber gas with
Discharge；Be provided with air inlet on the left of the sampling gas chamber upper end, be provided with gas outlet on the right side of upper end, the sampling gas chamber by a left side,
Right two chambers composition, two chambers are and full symmetric all at semi-ellipsoid shape, and intermediate stitching portion is provided with electrical modulation light source,
In the setting of left chamber focal point, there are two integrated detectors, and symmetrical with left chamber, right chamber focal point is also equipped with
Two integrated detectors.
2. the infrared gas sensor according to claim 1 with temperature control system, it is characterised in that: the LoRa is wireless
The information exchange of communication module completion infrared-gas sensing device and PC machine.
3. the infrared gas sensor according to claim 1 with temperature control system, it is characterised in that: in the temperature controlled compartment
There are certain gap, centre addition heat-barrier materials between wall and outer wall.
4. the infrared gas sensor according to claim 1 with temperature control system, it is characterised in that: in the temperature controlled compartment
There are four resistive heater, a temperature sensor, the microprocessing systems to receive the signal of temperature sensor, send out simultaneously for portion's dress
It instructs out, cooperation resistive heater work.
5. the infrared gas sensor according to claim 1 with temperature control system, it is characterised in that: electrical modulation light source hair
Infrared light out is received by a detector after reflection through over-sampling gas chamber upper surface and left and right sides inner wall.
6. the infrared gas sensor according to claim 1 with temperature control system, it is characterised in that: four integrated detections
Device is respectively used to the detection of methane, carbon dioxide, nitrous oxide, sulfur hexafluoride gas, and each integrated detector has independent survey
Measure channel and reference channel.
7. the infrared gas sensor according to claim 1 with temperature control system, it is characterised in that: the sampling gas chamber
Inner wall carries out the gold-plated processing of brass, makes the smooth enough of inner wall, reduces the loss in infrared light reflection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821734979.5U CN209027988U (en) | 2018-10-25 | 2018-10-25 | A kind of infrared gas sensor with temperature control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821734979.5U CN209027988U (en) | 2018-10-25 | 2018-10-25 | A kind of infrared gas sensor with temperature control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209027988U true CN209027988U (en) | 2019-06-25 |
Family
ID=66908232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821734979.5U Expired - Fee Related CN209027988U (en) | 2018-10-25 | 2018-10-25 | A kind of infrared gas sensor with temperature control system |
Country Status (1)
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| CN (1) | CN209027988U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816273A (en) * | 2020-12-30 | 2021-05-18 | 天津智易时代科技发展有限公司 | Gas rapid sampling processing air chamber |
-
2018
- 2018-10-25 CN CN201821734979.5U patent/CN209027988U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816273A (en) * | 2020-12-30 | 2021-05-18 | 天津智易时代科技发展有限公司 | Gas rapid sampling processing air chamber |
| CN112816273B (en) * | 2020-12-30 | 2023-08-08 | 天津智易时代科技发展有限公司 | Quick sampling treatment air chamber for gas |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190625 Termination date: 20211025 |