CN109444064A - Calibrating gas detection device and system - Google Patents
Calibrating gas detection device and system Download PDFInfo
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- CN109444064A CN109444064A CN201811588980.6A CN201811588980A CN109444064A CN 109444064 A CN109444064 A CN 109444064A CN 201811588980 A CN201811588980 A CN 201811588980A CN 109444064 A CN109444064 A CN 109444064A
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- 238000001514 detection method Methods 0.000 title claims abstract description 36
- 239000007789 gas Substances 0.000 claims abstract description 222
- 238000002835 absorbance Methods 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 44
- 239000010959 steel Substances 0.000 claims description 44
- 238000000862 absorption spectrum Methods 0.000 claims description 11
- 238000010521 absorption reaction Methods 0.000 claims description 9
- 238000001228 spectrum Methods 0.000 claims description 6
- 238000004566 IR spectroscopy Methods 0.000 claims description 3
- 241000208340 Araliaceae Species 0.000 claims description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims description 2
- 235000008434 ginseng Nutrition 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 11
- 238000004868 gas analysis Methods 0.000 abstract description 7
- 238000004164 analytical calibration Methods 0.000 abstract description 6
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 28
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 238000010586 diagram Methods 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000003595 spectral effect Effects 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000004445 quantitative analysis Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000012360 testing method Methods 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
Abstract
The present invention provides calibrating gas detection device and systems, it include: for holding the gas bomb of multiple gases, for three-way magnetic valve, threeway, photometer and the air pump of alternately switching supply gas, wherein, threeway includes the first output end, second output terminal and third output end；Gas bomb is connected with the first output end of threeway, the second output terminal of threeway is connected by gas circuit with the input terminal of three-way magnetic valve, the output end of three-way magnetic valve is connected with photometric one end for calculating absorbance, and the photometric other end is connected with air pump.The problem of changing over time the present invention overcomes the calibrating gas magnitude that gas analysis instrument calibration and calibration process use, the magnitude of standard gas can be accurately detected when using calibrating gas, improves the accuracy of gas analysis instrument calibration and calibration.
Description
Technical field
The present invention relates to gas concentration analysis technical fields, more particularly, to calibrating gas detection device and system.
Background technique
In gas analysis instrument is researched and developed and produced, calibrating gas is as a kind of standard substance, for calibration and prover
Device.Since calibrating gas has certain validity period, the stability of calibrating gas is the critical issue in use process.Many institute's weeks
Know, an important requirement to the calibrating gas being fitted into steel cylinder is that its magnitude should not become in preservation and use process
Change.Phenomena such as often causing Adsorption and desorption, chemical reaction when in fact, component gas and container inner wall contacting in calibrating gas,
To which its magnitude changes at any time, this phenomenon is inevitable, brings to the accurate calibration and calibration of gas analyzer
It is difficult.If accurate quantitative analysis can be carried out to calibrating gas when using calibrating gas, at any time by avoidance criteria gas itself
Between change bring error, greatly improve the calibration and calibration accuracy of instrument.
In conclusion the objective disadvantage of the prior art is that the accuracy of gas analyzer calibration and calibration is poor, use
Middle error and difficulty are more.
Summary of the invention
In view of this, overcoming gas analyzer the purpose of the present invention is to provide calibrating gas detection device and system
The problem of calibrating gas magnitude that device calibration and calibration process use changes over time, can accurately be examined when using calibrating gas
The magnitude of mark gas improves the accuracy of gas analysis instrument calibration and calibration.
In a first aspect, the embodiment of the invention provides calibrating gas detection devices, comprising: for holding the gas of multiple gases
Body steel cylinder, three-way magnetic valve, threeway, photometer and air pump for alternately switching supply gas, wherein the threeway includes the
One output end and second output terminal；
The gas bomb is connected with first output end of the threeway, and the second output terminal of the threeway passes through
Gas circuit is connected with the input terminal of the three-way magnetic valve, the output end of the three-way magnetic valve and the institute for calculating absorbance
It states photometric one end to be connected, the photometric other end is connected with the air pump.
With reference to first aspect, the embodiment of the invention provides the first possible embodiments of first aspect, wherein institute
Stating gas bomb includes tested calibrating gas steel cylinder and reference gas steel cylinder, wherein the tested calibrating gas interior of steel bottle is contained
It is placed with tested calibrating gas, the selected ginseng of spectrum according to the tested calibrating gas is contained in the reference gas steel cylinder
Examine gas.
The possible embodiment of with reference to first aspect the first, the embodiment of the invention provides second of first aspect
Possible embodiment, wherein the threeway includes the first threeway and the second threeway, first output of first threeway
End is connected with the tested calibrating gas steel cylinder, first output end and the reference gas steel cylinder of second threeway
It is connected, and first threeway is connected with the three-way magnetic valve with the second output terminal of second threeway.
With reference to first aspect, the embodiment of the invention provides the third possible embodiments of first aspect, wherein institute
Stating threeway further includes the third output end for emptying.
The possible embodiment of second with reference to first aspect, the embodiment of the invention provides the 4th kind of first aspect
Possible embodiment, wherein the three-way magnetic valve includes first input end and the second input terminal, and the first input end is logical
It crosses first threeway to be connected with the tested calibrating gas steel cylinder, second input terminal passes through second threeway and institute
Reference gas steel cylinder is stated to be connected.
With reference to first aspect, the embodiment of the invention provides the 5th kind of possible embodiments of first aspect, wherein institute
Stating photometer includes gas chamber, wherein the gas chamber includes thermostatic control, current constant control and Isobarically Control.
With reference to first aspect, the embodiment of the invention provides the 6th kind of possible embodiments of first aspect, wherein institute
Stating photometric operation wavelength range of choice includes ultraviolet light, visible light and infrared spectroscopy.
The possible embodiment of with reference to first aspect the first, the embodiment of the invention provides the 7th kind of first aspect
Possible embodiment, wherein characteristic absorption spectrum range of the photometric operation wavelength in the tested calibrating gas
It is interior, and within the scope of the characteristic absorption spectrum, the reference gas is without characteristic absorption.
The possible embodiment of with reference to first aspect the first, the embodiment of the invention provides the 8th kind of first aspect
Possible embodiment, wherein the signal of the photometer acquisition is approximate square waves signal, and adjacent to the ratio between high level and low value
Logarithm is the corresponding absorbance of the tested calibrating gas.
Second aspect, the embodiment of the invention provides calibrating gas detection systems, including Standard Gases physical examination as described above
Device is surveyed, further includes the wireless communication module for being connected with server.
The present invention provides calibrating gas detection device and systems, comprising: for holding the gas bomb of multiple gases, using
In the three-way magnetic valve, threeway, photometer and the air pump that alternately switch supply gas, wherein threeway includes the first output end, second
Output end and third output end；Gas bomb is connected with the first output end of threeway, and the second output terminal of threeway passes through gas circuit
It is connected with the input terminal of three-way magnetic valve, the output end of three-way magnetic valve and photometric one end phase for calculating absorbance
Connection, the photometric other end are connected with air pump.It is used the present invention overcomes gas analysis instrument calibration and calibration process
The problem of calibrating gas magnitude changes over time can accurately detect the magnitude of standard gas when using calibrating gas, improve gas
The accuracy of analysis instrument calibration and calibration.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention are in specification, claims
And specifically noted structure is achieved and obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is calibrating gas detection device schematic diagram provided in an embodiment of the present invention；
Fig. 2 is another calibrating gas detection device schematic diagram provided in an embodiment of the present invention；
Fig. 3 is the characteristic absorption spectrum schematic diagram of sulfur dioxide provided in an embodiment of the present invention；
Fig. 4 is sulfur dioxide steel cylinder Standard Gases detection device schematic diagram provided in an embodiment of the present invention.
Icon:
10- gas bomb；11- is tested calibrating gas steel cylinder；12- reference gas steel cylinder；20- threeway；The first threeway of 21-；
The second threeway of 22-；30- three-way magnetic valve；40- photometer；50- air pump.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Currently, calibrating gas is as a kind of standard substance, for calibration and school in gas analysis instrument is researched and developed and produced
Quasi- instrument.Since calibrating gas has certain validity period, the stability of calibrating gas is the critical issue in use process.It is many
Well known, an important requirement to the calibrating gas being fitted into steel cylinder is that its magnitude should not be sent out in preservation and use process
Changing.Often cause Adsorption and desorption, chemical reaction etc. when in fact, component gas and container inner wall contacting in calibrating gas
Phenomenon, so that its magnitude changes at any time, this phenomenon is inevitable, to the accurate calibration and calibration tape of gas analyzer
Difficulty is carried out.If accurate quantitative analysis can be carried out to calibrating gas when using calibrating gas, by avoidance criteria gas itself
Bring error is changed over time, the calibration and calibration accuracy of instrument are greatly improved.
In conclusion the objective disadvantage of the prior art is that the accuracy of gas analyzer calibration and calibration is poor, use
Middle error and difficulty are more.Based on this, a kind of calibrating gas detection device and system provided in an embodiment of the present invention overcome gas
The problem of calibrating gas magnitude that the calibration of body analysis instrument and calibration process use changes over time can use calibrating gas
When accurately detect the magnitude of standard gas, improve the accuracy of gas analysis instrument calibration and calibration.
For convenient for understanding the present embodiment, first to calibrating gas detection device disclosed in the embodiment of the present invention into
Row is discussed in detail.
Embodiment one:
Fig. 1 is calibrating gas detection device schematic diagram provided in an embodiment of the present invention.
Referring to Fig.1, calibrating gas detection device includes: for holding the gas bomb 10 of multiple gases, for alternately cutting
Change three-way magnetic valve 30, threeway 20, photometer 40 and the air pump 50 of supply gas, wherein threeway 20 include the first output end and
Second output terminal；
Gas bomb 10 is connected with the first output end of threeway 20, and the second output terminal of threeway 20 passes through gas circuit and threeway
The input terminal of solenoid valve 30 is connected, one end phase of the output end of three-way magnetic valve 30 and the photometer 40 for calculating absorbance
Connection, the other end of photometer 40 are connected with air pump 50.
Further, gas bomb 10 includes tested calibrating gas steel cylinder 11 and reference gas steel cylinder 12, wherein by mark
It is contained with tested calibrating gas inside quasi- gas bomb 11, is contained in reference gas steel cylinder 12 according to the light for being tested calibrating gas
Compose selected reference gas.
Further, threeway 20 includes the first threeway 21 and the second threeway 22, the first output end and quilt of the first threeway 21
The quasi- gas bomb 11 of mark is connected, and the first output end of the second threeway 22 is connected with reference gas steel cylinder 12, and the one or three
Logical 21 are connected with three-way magnetic valve 30 with the second output terminal of the second threeway 22.
Specifically, threeway 20 further includes the third output end for emptying.
The working principle of the present apparatus can be regarded as: tested standard gas cylinder and reference standard gas cylinder export regime flow
Standard Gases, a threeway is all connected in each gas circuit, and one end connection of threeway enters subsequent gas circuit, one end emptying.It connects into gas
The two-way Standard Gases on road are separately connected two inlet ends of three-way magnetic valve, and the outlet side of three-way magnetic valve is connected into light by tracheae
Degree meter gas circuit connects air pump in photometric outlet port.
Further, three-way magnetic valve 30 includes first input end and the second input terminal, and first input end passes through the one or three
Logical 21 are connected with tested calibrating gas steel cylinder 11, and the second input terminal is connected by the second threeway 22 with reference gas steel cylinder 12
It connects.
Specifically, three-way magnetic valve has two-way input and exports all the way, and two input ports are respectively connected to tested steel cylinder mark
Quasi- gas and reference steel cylinder Standard Gases.Being switched by three-way magnetic valve makes tested steel cylinder Standard Gases and replaces with reference to steel cylinder Standard Gases
By three-way magnetic valve, enter photometer from the outlet side of three-way magnetic valve.
Further, photometer 40 includes gas chamber, wherein gas chamber control includes thermostatic control, current constant control and constant pressure control
System.
Further, the operation wavelength range of choice of photometer 40 includes ultraviolet light, visible light and infrared spectroscopy.
Further, the operation wavelength of photometer 40 is within the scope of the characteristic absorption spectrum of tested calibrating gas, and at this
Within the scope of characteristic absorption spectrum, reference gas is no characteristic absorption.
Specifically, photometer operation wavelength is within the scope of the characteristic absorption spectrum of tested steel cylinder Standard Gases, and in spectrum
In operating wavelength range, there is no characteristic absorption with reference to steel cylinder Standard Gases.
Further, the signal that photometer 40 acquires is approximate square waves signal, and adjacent to the logarithm of the ratio between high level and low value
To be tested the corresponding absorbance of calibrating gas.
This have the advantage that: light source fluctuation influence is small, dynamic range is big, the range of linearity is big, measurement is accurate,
Fast response time, structure are simple, are easily achieved.
Embodiment two:
In the present embodiment, calibrating gas detection method will be made to introduce, to be best understood from the offer of embodiment one
The working principle of device.
Calibrating gas detection method utilizes the optical signature absorption characteristic of calibrating gas, selects the characteristic absorption of tested standard gas
Spectrum segment, in addition select it is a kind of the gas of characteristic absorption is not as reference gas in this spectral region, by tested Standard Gases
Body and reference gas are alternately passed through photometer of the operating spectral range within the scope of calibrating gas characteristic absorption spectrum.Photometer exists
It is not absorb light intensity that light intensity is acquired when being passed through reference gas, and the light intensity acquired when being passed through tested calibrating gas is light after absorbing
By force, absorbance is calculated using light intensity after not absorbing light intensity and absorbing, the concentration of the absorbance and calibrating gas is proportional.
The photometer can carry out the accurate detection of calibrating gas after the calibrating gas detection device of higher precision carries out transmission of quantity value.
In method provided in an embodiment of the present invention, when alternating is passed through reference gas and tested calibrating gas, photometer is adopted
For the signal integrated as approximate square waves signal, neighbouring high level and the logarithm of the ratio between low value are the corresponding absorbance value of the calibrating gas.
Calibrating gas detection method provided in an embodiment of the present invention, with calibrating gas detection device provided by the above embodiment
Technical characteristic having the same reaches identical technical effect so also can solve identical technical problem.
Embodiment three:
Fig. 2 is a kind of calibrating gas detection method functional block diagram.It is as shown in the figure: to be tested steel cylinder calibrating gas and refer to steel cylinder
Calibrating gas is exported with regime flow, and a threeway, one end air inlet of threeway, both ends are separately connected in respective output gas circuit
Outlet, one end of threeway outlet are connected respectively to the inlet end of the three-way magnetic valve in subsequent gas circuit, other end emptying.Three are powered
Two inlet ends of magnet valve are separately connected tested steel cylinder calibrating gas and the gas circuit with reference to steel cylinder calibrating gas, and outlet side connects light
The inlet end of degree meter gas chamber.Make tested steel cylinder calibrating gas by the gating of three-way magnetic valve and replaces with reference to steel cylinder calibrating gas
Into photometer gas chamber.Air pump is evacuated outward with regime flow in photometric outlet side, and flow is arranged less than steel cylinder calibrating gas
Flow out, it is ensured that surrounding air will not be mixed into photometric gas.When the gas for entering photometer gas chamber is tested steel
When bottle calibrating gas, the signal of photometer acquisition is I1, when the gas for entering photometer gas chamber is with reference to steel cylinder calibrating gas,
The signal of photometer acquisition is I0, then ln (I0/I1) it is proportional to standard gas concentration.Standard of the photometer through higher precision
The accurate detection of calibrating gas can be carried out after gas detection equipment progress transmission of quantity value.
Example IV:
In the present embodiment, it will be illustrated by taking the detection of sulfur dioxide steel cylinder Standard Gases as an example.
Fig. 3 is sulfur dioxide in the characteristic absorption spectrum of ultraviolet spectral coverage, and nitrogen does not have any absorption in this spectrum segment, because
This can select nitrogen as reference gas to detect sulfur dioxide steel cylinder calibrating gas.Photometric operating spectral range is optional
Select 240~320nm range or in which a part.
As shown in connection with fig. 4, in the present embodiment, sulfur dioxide steel cylinder Standard Gases and pure nitrogen gas are defeated with the flow of 1L/min
Out, a threeway is respectively connected in output pipe.The one outlet of threeway in sulfur dioxide gas circuit empties, another outlet connects
It is connected to the entrance of three-way magnetic valve sulfur dioxide Standard Gases.The one outlet of threeway in nitrogen gas circuit empties, another outlet
It is connected to the entrance of three-way magnetic valve nitrogen Standard Gases.The outlet of three-way magnetic valve connects photometric chamber inlet, photometer
Gas chamber outlet connect with air pump.Pressure sensor and flow sensing are provided in gas circuit between air pump and photometer gas chamber
Device.Three-way magnetic valve can make sulfur dioxide Standard Gases and nitrogen alternately enter photometer gas chamber with switching gas circuit.Control air pump makes
In gas circuit stability of flow in 0.8L/min.
Photometric light source selects central wavelength for 290nm, and halfwidth is the ultraviolet LED of 10nm, the luminescent spectrum of light source
Range is exactly within the scope of the characteristic absorption spectrum of sulfur dioxide；Detector selection has sound within the scope of 200~1000nm
The silicon photoelectric diode answered.The light that light source issues is collimated to enter gas chamber, and light beam passes through gas chamber in the process by sulfur dioxide gas
Body absorbs, and does not absorb when what is passed through is nitrogen, and silicon photodiode detector detects the light for being full of nitrogen in gas chamber
Strong I0, the light intensity I that is by sulfur dioxide gas1, calculate absorbance A=ln (I0/I1), the absorbance A and sulfur dioxide it is dense
Spend it is directly proportional, through higher precision calibrating gas detection device carry out transmission of quantity value after can go out Standard Gases by A value survey calculation
The actual concentrations of body.
Photometric gas chamber does thermostatic control, and temperature is constant at 45 degrees Celsius in the present embodiment.
It should be noted that the present embodiment is not limited only to the test of sulfur dioxide, for other ultraviolet, visible and infrared
The method for having the gas of characteristic absorption that can use the present embodiment in spectral region, can carry out the accurate inspection of standard gas concentration
It surveys.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
It with the specific work process of device, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
In addition, term " first ", " second ", " third " are used for description purposes only, it is not understood to indicate or imply phase
To importance.
Finally, it should be noted that embodiment described above, only a specific embodiment of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, those skilled in the art should understand that: anyone skilled in the art
In the technical scope disclosed by the present invention, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover in protection of the invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of calibrating gas detection device characterized by comprising for holding the gas bomb of multiple gases, for handing over
For three-way magnetic valve, threeway, photometer and the air pump of switching supply gas, wherein the threeway includes the first output end and the
Two output ends；
The gas bomb is connected with first output end of the threeway, and the second output terminal of the threeway passes through gas circuit
It is connected with the input terminal of the three-way magnetic valve, the output end of the three-way magnetic valve and the light for calculating absorbance
One end of degree meter is connected, and the photometric other end is connected with the air pump.
2. calibrating gas detection device according to claim 1, which is characterized in that the gas bomb includes tested standard
Gas bomb and reference gas steel cylinder, wherein the tested calibrating gas interior of steel bottle is contained with tested calibrating gas, the ginseng
Examine the selected reference gas of spectrum being contained in gas bomb according to the tested calibrating gas.
3. calibrating gas detection device according to claim 2, which is characterized in that the threeway includes the first threeway and the
Two threeways, first output end of first threeway are connected with the tested calibrating gas steel cylinder, second threeway
First output end be connected with the reference gas steel cylinder, and described the of first threeway and second threeway
Two output ends are connected with the three-way magnetic valve.
4. calibrating gas detection device according to claim 1, which is characterized in that the threeway further includes for emptying
Third output end.
5. calibrating gas detection device according to claim 3, which is characterized in that the three-way magnetic valve includes first defeated
Entering end and the second input terminal, the first input end is connected by first threeway with the tested calibrating gas steel cylinder,
Second input terminal is connected by second threeway with the reference gas steel cylinder.
6. calibrating gas detection device according to claim 1, which is characterized in that the photometer includes gas chamber, wherein
The gas chamber includes thermostatic control, current constant control and Isobarically Control.
7. calibrating gas detection device according to claim 1, which is characterized in that the photometric operation wavelength selection
Range includes ultraviolet light, visible light and infrared spectroscopy.
8. calibrating gas detection device according to claim 2, which is characterized in that the photometric operation wavelength is in institute
Within the scope of the characteristic absorption spectrum for stating tested calibrating gas, and within the scope of the characteristic absorption spectrum, the reference gas without
Characteristic absorption.
9. calibrating gas detection device according to claim 2, which is characterized in that the signal of the photometer acquisition is close
Like square-wave signal, and neighbouring high level and the logarithm of the ratio between low value are the corresponding absorbance of the tested calibrating gas.
10. a kind of calibrating gas detection system, which is characterized in that including claim 1 to the described in any item marks of claim 9
Quasi- gas-detecting device further includes the wireless communication module for being connected with server.
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| CN201811588980.6A CN109444064A (en) | 2018-12-25 | 2018-12-25 | Calibrating gas detection device and system |
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| CN201811588980.6A CN109444064A (en) | 2018-12-25 | 2018-12-25 | Calibrating gas detection device and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855911A (en) * | 2020-07-29 | 2020-10-30 | 中航长城计量测试(天津)有限公司 | Combustible gas distribution device |
| CN113686787A (en) * | 2021-08-13 | 2021-11-23 | 力合科技（湖南）股份有限公司 | Filtering pool packaging structure and packaging process |
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