CN209327201U - Calibrating gas detection device and system - Google Patents
Calibrating gas detection device and system Download PDFInfo
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- CN209327201U CN209327201U CN201822196025.XU CN201822196025U CN209327201U CN 209327201 U CN209327201 U CN 209327201U CN 201822196025 U CN201822196025 U CN 201822196025U CN 209327201 U CN209327201 U CN 209327201U
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Abstract
The utility model provides calibrating gas detection device and system, 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 utility model overcomes the problem of gas analysis instrument calibration is changed over time with the calibrating gas magnitude that calibration process uses, and 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 utility model 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.
Utility model content
In view of this, overcoming gas point the purpose of this utility model is to provide calibrating gas detection device and system
The problem of calibrating gas magnitude that analysis instrumental calibration and calibration process use changes over time, can be quasi- when using calibrating gas
The really magnitude of detection standard gas, improves the accuracy of gas analysis instrument calibration and calibration.
In a first aspect, the utility model embodiment provides calibrating gas detection device, comprising: for holding multiple gases
Gas bomb, for alternately switch supply gas three-way magnetic valve, threeway, photometer and air pump, wherein the threeway packet
Include the first 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 utility model embodiment provides the first possible embodiment of first aspect,
In, the gas bomb includes tested calibrating gas steel cylinder and reference gas steel cylinder, wherein in the tested calibrating gas steel cylinder
Portion is contained with tested calibrating gas, is contained with according to selected by the spectrum of the tested calibrating gas in the reference gas steel cylinder
Reference gas.
The possible embodiment of with reference to first aspect the first, the utility model embodiment provide the of first aspect
Two kinds of possible embodiments, wherein the threeway include the first threeway and the second threeway, described the first of first threeway
Output end is connected with the tested calibrating gas steel cylinder, first output end and the reference gas of second threeway
Steel cylinder is connected, and first threeway is connected with the three-way magnetic valve with the second output terminal of second threeway
It connects.
With reference to first aspect, the utility model embodiment provides the third possible embodiment of first aspect,
In, the threeway further includes the third output end for emptying.
The possible embodiment of second with reference to first aspect, the utility model embodiment provide the of first aspect
Four kinds of possible embodiments, wherein the three-way magnetic valve includes first input end and the second input terminal, first input
End is connected by first threeway with the tested calibrating gas steel cylinder, and second input terminal passes through second threeway
It is connected with the reference gas steel cylinder.
With reference to first aspect, the utility model embodiment provides the 5th kind of possible embodiment of first aspect,
In, the photometer includes gas chamber, wherein the gas chamber includes thermostatic control, current constant control and Isobarically Control.
With reference to first aspect, the utility model embodiment provides the 6th kind of possible embodiment of first aspect,
In, the 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 utility model embodiment provide the of first aspect
Seven kinds of possible embodiments, wherein characteristic absorption spectrum of the photometric operation wavelength in the tested calibrating gas
In range, 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 utility model embodiment provide the of first aspect
Eight kinds of possible embodiments, wherein the signal of photometer acquisition is approximate square waves signal, and neighbouring high level and low value it
The logarithm of ratio is the corresponding absorbance of the tested calibrating gas.
Second aspect, the utility model embodiment provide calibrating gas detection system, including Standard Gases as described above
Body detection device further includes the wireless communication module for being connected with server.
The utility model provides calibrating gas detection device and system, comprising: for holding the gas steel of multiple gases
Bottle, three-way magnetic valve, threeway, photometer and air pump for 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, and the second output terminal of threeway is logical
Gas circuit is crossed to be connected with the input terminal of three-way magnetic valve, the output end of three-way magnetic valve with for calculating the photometric of absorbance
One end is connected, and the photometric other end is connected with air pump.The utility model overcomes gas analysis instrument calibration and calibration
The problem of calibrating gas magnitude that process uses changes over time can accurately detect the amount of standard gas when using calibrating gas
Value improves the accuracy of gas analysis instrument calibration and calibration.
Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
To enable the above objects, features, and advantages of the utility model 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 right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is calibrating gas detection device schematic diagram provided by the embodiment of the utility model；
Fig. 2 is another calibrating gas detection device schematic diagram provided by the embodiment of the utility model；
Fig. 3 is the characteristic absorption spectrum schematic diagram of sulfur dioxide provided by the embodiment of the utility model；
Fig. 4 is sulfur dioxide steel cylinder Standard Gases detection device schematic diagram provided by the embodiment of the utility model.
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
To keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, below in conjunction with attached drawing to this
The technical solution of utility model is clearly and completely described, it is clear that described embodiment is that the utility model a part is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, fall within the protection scope of the utility model under the premise of creative work.
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 by the embodiment of the utility model overcome
The problem of calibrating gas magnitude that gas analysis instrument calibration and calibration process use changes over time, can be in the standard of using
The magnitude of standard gas is accurately detected when gas, improves the accuracy of gas analysis instrument calibration and calibration.
To detect fill to calibrating gas disclosed in the utility model embodiment first convenient for understanding the present embodiment
It sets and describes in detail.
Embodiment one:
Fig. 1 is calibrating gas detection device schematic diagram provided by the embodiment of the utility model.
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.
The advantages of the utility model embodiment is: light source fluctuation influence is small, dynamic range is big, the range of linearity is big, measurement
Accurately, 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 by the embodiment of the utility model, when alternating is passed through reference gas and tested calibrating gas, luminosity
The signal of meter acquisition is approximate square waves signal, and neighbouring high level and the logarithm of the ratio between low value are the corresponding absorbance of the calibrating gas
Value.
Calibrating gas detection method provided by the embodiment of the utility model is detected with calibrating gas provided by the above embodiment
Device 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 utility model embodiment unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present 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 specific embodiment of the present utility model, to illustrate this
The technical solution of utility model, rather than its limitations, the protection scope of the utility model is not limited thereto, although referring to aforementioned
The utility model is described in detail in embodiment, those skilled in the art should understand that: it is any to be familiar with this skill
The technical staff in art field within the technical scope disclosed by the utility model, still can be to skill documented by previous embodiment
Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications,
Variation or replacement, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
It encloses, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model is answered described is wanted with right
Subject to the protection scope asked.
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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| CN201822196025.XU CN209327201U (en) | 2018-12-25 | 2018-12-25 | Calibrating gas detection device and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822196025.XU CN209327201U (en) | 2018-12-25 | 2018-12-25 | Calibrating gas detection device and system |
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| CN209327201U true CN209327201U (en) | 2019-08-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444064A (en) * | 2018-12-25 | 2019-03-08 | 青岛海纳光电环保有限公司 | Calibrating gas detection device and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444064A (en) * | 2018-12-25 | 2019-03-08 | 青岛海纳光电环保有限公司 | Calibrating gas detection device and system |
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Address after: 266000 379 Hedong Road, Qingdao high tech Zone, Shandong Patentee after: Qingdao Laoying Haina Photoelectric Environmental Protection Group Co., Ltd. Address before: 266000 379 Hedong Road, hi tech Zone, Chengyang District, Qingdao, Shandong Patentee before: Qingdao Haina Guangdian Environmental Protection Co., Ltd. |