CN207147966U - Gas analyzer - Google Patents
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- CN207147966U CN207147966U CN201721047840.9U CN201721047840U CN207147966U CN 207147966 U CN207147966 U CN 207147966U CN 201721047840 U CN201721047840 U CN 201721047840U CN 207147966 U CN207147966 U CN 207147966U
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Abstract
The utility model proposes a kind of gas analyzer, category gas analysis field, advantage is to realize the measurement to being tested gas every half air chamber technology using miniflow.It is mainly characterized by：Set in a cavity all the way reference gas chamber, measure air chamber all the way, and use the miniflow infrared gas detection device of front and rear flowing, prior art is overcome using drift caused by single air chamber is big, measurement stability is poor, and the problems such as using independent double air chamber process structure complexity；In addition, miniflow infrared gas detection device is provided with water transportation device, by the overlapping phenomenon for finding vaporous water and tested gas absorption spectrum, using vaporous water, it is tested absorption spectra width difference of the gas to infrared light, water adjusting valve is adjusted, changes air chamber, the change in water transfer buffer air chamber after gas expansion before and after miniflow infrared gas detection device so that the infrared spectrum detected is in the absorption spectra of tested gas, absorption spectra away from vaporous water simultaneously, the problem of overcoming moisture interference.
Description
Technical field
The utility model belongs to gas analysis field, more particularly to gas analyzer.
Background technology
With environmental pollution getting worse, the whole world is being strengthened to pollutant monitoring and analysis, and prior art proposes to utilize
NDIR scattering method (NDIR) principle is measured and monitored to tested gas, specifically according to Lang Bo-Beer law, is divided
The absorption characteristic that the composition such as SO2, NO, CO2, CO has to infrared light in analysis flue gas, it is determined that the constituent concentration of tested gas.With
Environmentally friendly laws and regulations it is more severe, for SO2.NO, CO measurement all progressively requires to use ultralow range.For 0-100mg/
M3 ultralow range, will reach long time drift 2.5%FS requirement, and the country, which also lacks, at present can meet this requirement
NDIR infrared gas analyser devices.Single beam pneumatic infrared gas sensor (micro-flow miniflows were used in the world in the past
NDIR or Luft microphone NDIR) flue gas analyzer, such as Siemens U23 and FUJI ZRJ series, also progressively
It is impossible to meet ultralow range 0-100mg/m3 environment monitoring requirement.
There is the experience of comparative maturity in CEMS monitoring instruments field in the world, SIEMENS, FUJI and ABB etc. are carried
The new flue gas analyzer using dual-beam pneumatic infrared sensor is gone out.Such as in patent document US20130043391A1
" Non-dispersive infrared (NDIR) the dual trace that middle SIEMENS AKTIENGESELLSCHAFT are proposed
gas analyzer and method for determining a concentration of a measurement gas
component in a gas mixture by the gas analyzer”：Air chamber is the two-tube double air chamber structures of fork-shaped, volume
Greatly, it is unfavorable for the miniaturization of instrument, process structure is complicated, involves great expense；Using double-deck light pneumatic structure, (miniflow senses sensor
Device), tested air-flow flows relative to light source direction of the launch or so, it is impossible to prevents interference of the moisture to tested gas；It is in addition, infrared
Light source employs beam splitter, causes infrared light reflection to cause the loss of signal, measurement inaccuracy.In patent document
In EP0093939A1, " the Non-dispersive infrared gas of FUJI ELECTRIC CO.LTD propositions
analyzer”：Air chamber is single air chamber, no reference, and sensor uses double-deck light pneumatic structure (microfluidic sensor), tested air-flow phase
For being flowed before and after the light source direction of the launch, easily influenceed (factor such as light source, temperature) by external environmental factor, drift is big, steady
Qualitative difference.In patent document EP2551662A1, " the Optical gas analysis of ABB TECHNOLOGY AG propositions
device with resources to improve the selectivity of gas mixture analyses”：Adopt
With every half air chamber, defect is to use light pneumatic transmitter (microphony sensor), and tested air-flow is relative to light source direction of the launch or so
Flowing, can not avoid interference of the moisture to test.
Utility model content
To solve prior art defect, the utility model proposes a kind of gas analyzer, using every half air chamber technology, with reference to
Can water resistant interference front and rear flowing miniflow infrared gas detection device, realize to tested gas composition concentration analysis, test is accurate,
It is stable, lower range testing requirement can be met.
On the one hand the utility model proposes a kind of gas analyzer, including：
An at least cavity, dividing plate is set along the central axis of cavity, and cavity is divided into reference gas chamber and measurement air chamber；
Light source module：It is arranged at one end of cavity；
Miniflow infrared gas detection device, launch for detecting light source module and pass through the light intensity of cavity, be arranged at cavity
The other end.
Preferably, dividing plate is identical with the length of cavity, and cavity is separated into size and shape identical reference gas chamber by dividing plate
With measurement air chamber.
Preferably, miniflow infrared gas detection device includes preceding air chamber, rear gas chamber, miniflow infrared sensor, water transportation device,
Launch for detecting light source module and pass through the light intensity of cavity.
Preferably, light source module, including light source, motor, cut mating plate.
Preferably, miniflow infrared gas detection device include preceding air chamber, rear gas chamber, miniflow infrared sensor, for eliminating
The water transportation device of the influence of moisture.Water transportation device includes water adjusting valve, water transfer buffer air chamber and for connecting water transfer surge chamber with before
The connecting pipe of rear gas chamber.
Preferably, the direction of propagation for the light that preceding air chamber, rear gas chamber, water transportation device are sent along light source module successively is carried out
Set.
Preferably, the light that preceding air chamber, rear gas chamber, water adjusting valve, water transfer buffer air chamber are sent along light source module successively
The direction of propagation is configured
Preferably, cut mating plate by the second mounting seat with cavity to be connected, pass through buckle between cavity and the second mounting seat
Connection, adds several screws and screw is assembled between the second mounting seat and cavity.
Preferably, cut and the first loophole and the second loophole are provided with mating plate, cut mating plate under the drive of motor at the uniform velocity
Rotate, periodically, alternately state the light that the light source is sent in reference gas chamber by the irradiation of the first loophole, light source is sent
Light by the second loophole be irradiated to measurement air chamber in.
Preferably, light source module also includes a photo-coupler, and reference gas chamber is just irradiated to for judge current time,
Still it is irradiated to measurement air chamber.
Preferably, gas analyzer also includes radiating block, and radiating block is close to light source module, for being dissipated to light source module
Heat.
Preferably, gas analyzer also includes thermostatic chamber, and cavity, light source module and miniflow infrared gas detection device are put
It is placed in thermostatic chamber.
Preferably, gas analyzer also includes processing unit, for the formula according to testing result and wherein to prestore, calculates
Go out the concentration of tested gas.
In summary, gas analyzer provided by the utility model includes an at least cavity, passes through the central shaft in cavity
Line sets dividing plate, and cavity is divided into size and shape all identical reference gas chambers and measurement air chamber, overcomes prior art use
Being drifted about caused by single air chamber, big, measurement stability is poor, and the problems such as using independent double air chamber process structure complexity；The infrared gas of miniflow
Body detection means increase a water transportation device, by finding the overlapping phenomenon of vaporous water and tested gas absorption spectrum, using vaporous water,
Tested gas is to the absorption spectra width difference of infrared light, so as to adjust water adjusting valve, before and after changing miniflow infrared gas detection device
Change in flow in air chamber, water transfer buffer air chamber after gas expansion so that the infrared spectrum detected is in the suction of tested gas
Receive in spectrum, while the absorption spectra away from vaporous water, the problem of overcoming moisture interference, reach the accurate technique effect of measurement.
It should be appreciated that above description is exemplary, the scope of the utility model can not be limited.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing：
Fig. 1 is the test philosophy schematic diagram of the gas analyzer shown in embodiment 1；
Fig. 2 is the chamber and the general assembly drawing of light source module and Optical Receivers of the gas analyzer shown in embodiment 1；
Fig. 3 is the stereogram of the cavity of the gas analyzer shown in embodiment 1；
Fig. 4 is the cavity and the exploded view of light source module and Optical Receivers of the gas analyzer shown in embodiment 1；
Fig. 5 is the general assembly drawing of the gas analyzer shown in embodiment 1；
Fig. 6 is the oscillogram of the gas analysis analysis method reference gas chamber and measurement air chamber output shown in embodiment 2；
Fig. 7 is the oscillogram of the gas analysis analysis method reference gas chamber and measurement air chamber output shown in embodiment 2；
Fig. 8 is the analysis method for gases fitting schematic diagram shown in embodiment 2.
Embodiment
The technical solution of the utility model is described in further detail below by embodiment, and with reference to accompanying drawing.
The reference gas chamber 10a of 12 dividing plate of cavity 10 light source module, 11 Optical Receivers 101 measurement air chambers 10b
The motor 111 of light source 110 cuts loophole 112a the second loophole the first mounting seats of the 112b 111a of mating plate 112 first
The miniflow infrared gas detection device 123 of second 121 optical filter of mounting seat 111b the 3rd mounting seats of flanged plate 120 122
Preceding air chamber 123a rear gas chamber 123b miniflows infrared sensor 123c water transfer buffer air chamber 123d connecting pipes 123e
The photo-coupler of 14 photo-coupler of water adjusting valve 123f screw 11a processing unit 13 radiating block, 114 thermostatic chambers 115 is sent out
Penetrate the installation position 115b of the installation position 115a photo-coupler receiving terminals at end.
Embodiment one：
With reference to figure 1-5, a kind of gas analyzer, including a cavity 10, light source module 11, Optical Receivers 12 and processing
Unit 13, one end of cavity 10 are connected with light source module 11, and the other end is connected with Optical Receivers 12, by being arranged on chamber
Cavity 10 is divided to for size and shape all two air chambers of identical, i.e. reference gas chamber 10a by the dividing plate 101 of the axial centerline of body 10
With measurement air chamber 10b, in the present embodiment, reference gas chamber 10a and measurement air chamber 10b opposed separators 101 are symmetrical arranged, the ginseng
The cross section for examining air chamber 10a and the measurement air chamber 10b is disposed as semicircle.It is contemplated that：During practical application, cross section
It is rectangle or other geometries within this programme protection domain.
Dividing plate 101 is identical with the length of cavity 10.Dividing plate 101 is attached to prevent light with cavity 10 by welding manner
Reveal in source.
The volume of whole measuring instrument, drop can be reduced every half structure (dividing plate 101) by being set in a cavity 10
Low cost, and can guarantee that reference gas chamber 10a and measure air chamber 10b uniformity, reduce due to reference gas chamber 10a and measurement gas
The room 10b inconsistent testing result error brought.
A usual cavity 10 can only survey a kind of tested gas, be filled with the reference gas chamber 10a of cavity 10 to light source not
The reference gas of absorption, such as N2.Air inlet and gas outlet is provided with measurement air chamber 10b to flow in and out for tested gas.
In order to measure a variety of tested gases simultaneously, multiple cavities 10 can be set in gas analyzer simultaneously.In the present embodiment accompanying drawing
Only it is illustrated with two cavitys 10 of setting.
Light source module 11 projects the irradiation light of the absorbing wavelength band of the absorption spectrum comprising tested gas.Light source module 11 wraps
Include light source 110, motor 111 and cut mating plate 112.Light source 110 and motor 111 are entered by the first mounting seat 111a with cutting mating plate 112
Row connection.Motor 111 is arranged on motor mount.Mating plate 112 is cut by the second mounting seat 111b with cavity 10 to be connected.
It is attached between the mounting seat 111b of cavity 10 and second by buckle structure, in order to prevent the radial direction of light source 110
Light caused by movement is floated, and several screws 11a and screw are provided between the second mounting seat 111b and air chamber cavity body 10, is led to
Cross screw 11a and screw carries out tight fit.
First mounting seat 111a is relative with the second mounting seat 111b position, and is provided with size in corresponding position
The circular hole to match with shape and cavity 10, to ensure that the luminous energy that light source 110 is sent is irradiated in cavity 10.Cut on mating plate 112
There is provided one first loophole 112a and one second loophole 112b, cuts the uniform rotation under the drive of motor 111 of mating plate 112,
Cycle, alternately the light that light source 110 is sent is irradiated in reference gas chamber 10a by the first loophole 112a and by light source 110
The light sent is irradiated in measurement air chamber 10b by the second loophole 112b.
For example motor 111 so, when motor 111 rotates, was joined with the frequency uniform rotation for rotating 10 times in one second
Air chamber 10a and measurement air chamber 10b are examined inside 1 seconds, is blocked by 10 irradiations of light source with 10 times.
It is tested the infrared light that gas sends light source 110 in measurement air chamber 10b to absorb, in reference gas chamber 10a
Reference gas N2 does not absorb to the infrared light that light source 110 is sent.
Optical Receivers 12 receives the light that light source module 11 is launched and Optical Receivers 12 is reached by cavity 10, light-receiving
Module 12 includes flanged plate 120, the 3rd mounting seat 121, optical filter 122 and miniflow infrared gas detection device 123.
Cavity 10 is connected by flanged plate 120 with miniflow infrared gas detection device 123, infrared in cavity 10 and miniflow
Optical filter 122 is provided with before gas-detecting device 123, optical filter 122 can eliminate or reduce the shadow of scattering and interfering component
Ring, can make that there is the infrared light of characteristic absorption wavelength to pass through.
Light reaches miniflow infrared gas detection device 123 through cavity 10, and the optical signal received is converted into electric signal.
Miniflow infrared gas detection device 123 is the sensor for the composition and concentration that can measure specific gas.For example can be that SO2 is micro-
Flow infrared sensor, NO sensors or other sensors.The miniflow when miniflow infrared gas detection device 123 is SO2 sensors
Infrared gas detection device 123 can determine the light intensity attenuation feelings in corresponding absorption bands according to the SO2 absorption characteristic to light
Condition, and testing result is converted into electric signal.Such as accompanying drawing 1, miniflow infrared gas detection device 123 include preceding air chamber 123a,
Rear gas chamber 123b, miniflow infrared sensor 123c, water transportation device, water transportation device is by water adjusting valve 123f, water transfer buffer air chamber 123d
And the connecting pipe 123e for connecting water transfer surge chamber 123d and rear gas chamber 123b is formed, by by reference gas, containing non-cold
The reference gas of condensate each leads into measurement air chamber successively, by adjusting water adjusting valve 123f so that the reference containing non-condensing water
The caused electric signal on miniflow infrared gas detection device 123 is in the same size with reference gas for gas, can eliminate to greatest extent
Influence of the moisture to tested gas.Because rear gas chamber 123b is connected with water transfer buffer air chamber 123d by connecting pipe 123e, two
Person can be equivalent to an air chamber, and in the present embodiment, water adjusting valve 123f is the lighttight dividing plate of sheet.
Specifically, the water transfer method of the present embodiment is as follows：
S1, it is filled with tested gas SO2, reference gas in preceding air chamber 123a, rear gas chamber 123b and water transfer buffer air chamber 123d
Room 10a starts to be charged reference gas N2 certainly.
S2, reference gas N2 is poured in air chamber 10b is measured, obtain the measurement air chamber of miniflow infrared sensor 123c measurements
Corresponding electric signal size.Due to when performing this step the location of water adjusting valve 123f to the effect of the utility model water transfer
Influence very little, therefore water adjusting valve 123f need not do considered critical the location of when carrying out this step, but the present embodiment in order to
Subsequent adjustment is convenient, and water adjusting valve 123f is adjusted to half blocking position to water transfer buffer air chamber 123d in this step.
S3, release reference gas N2 in measurement air chamber 10b, re-filled in air chamber 10b measure 4 DEG C to contain saturation non-
The reference gas N2 of condensed water, regulation water adjusting valve 123f position so that the measurement air chamber of miniflow infrared sensor 123c detections
Corresponding electric signal size is identical with signal magnitude in step S2.Now, water transfer finishes, and fixed water adjusting valve 123f position, adjusts
Water valve 123f position now is the position after final water transfer, and the gas analyzer after water transfer can adapt to various
The measurement of the tested gas of different moisture content.Wherein, the reference gas N2 of 4 DEG C of the water of non-condensing containing saturation can be by by reference gas
Body N2 after 4 DEG C of water by obtaining.
It is different from previous patent, front and rear air chamber 123a, 123b, the water adjusting valve of miniflow infrared gas detection device 123
123f and water transfer buffer air chamber 123d follows one another laterally set before and after ground in the direction of propagation of light, in front and rear air chamber and
Water transfer buffer air chamber is passed through the calibrating gas for including and can absorbing tested gas component characteristic absorption peak, such as can be filled with standard
The gases such as SO2 or NO.According to the direction of propagation of light, set respectively between preceding air chamber 123a, rear gas chamber 123b, buffer air chamber 123d
Put optical filter.
When gases are heated, they expand in air chamber 123a before when by Infrared irradiation, while to the infrared light received
Absorbed, thus the gas in rear gas chamber 123b also can expanded by heating, but the light being subject to due to preceding air chamber 123a gas
The intensity of intense irradiation is bigger, and the coefficient of expansion is bigger, and the gas in preceding air chamber 123a can flow to rear gas chamber 123b, be formed by going to
Rear to air-flow.When miniflow infrared gas detection device 123 is not by Infrared irradiation, the recovery of gas slowly is normal
State, due to the gas in preceding air chamber 123a, when being irradiated by optical signal, part has flowed to rear gas chamber 123b, when gas recovers
During normal condition, preceding air chamber 123a pressure diminishes, and the gas in rear gas chamber 123b can forwardly flow, until reaching front and rear pressure
It is strong equal, therefore a reverse air-flow can be produced, the flow velocity of air-flow is proportional to the luminous intensity of the optical signal received, and miniflow is red
The change of air-flow velocity is converted into the change of electric signal by outer sensor 123c, and the change of air-flow velocity is proportional to the change of electric signal
Change, therefore the intensity variation of the optical signal received can be changed into the change of electric signal by miniflow infrared sensor 123c.
Because vaporous water is wider to the absorption spectra of infrared light, the gas such as SO2 and NO is narrower to the absorption spectra of infrared light.Pass through
The tested gas of detection is corresponded in absorption spectra to infrared light, the light intensity attenuation situation away from vaporous water to the wave band of Infrared absorption spectrum
To carry out the detection of gas concentration, the interference that vaporous water detects to gas is reduced with this.
During test, miniflow infrared gas detection device 123 receives from reference gas chamber 10a and measurement within a certain period of time
Air chamber 10b light is simultaneously converted to electric signal output.
Referring to Fig. 4, light source module 11 also includes a photo-coupler 115, photo-coupler 115 is used to judge current time
The reference gas chamber 10a of cavity 10 is just irradiated to, is still irradiated in the measurement air chamber 10b of cavity 10.Photo-coupler 115 includes
One transmitting terminal and a receiving terminal, photo-coupler transmitting terminal 115 and photo-coupler receiving terminal are respectively positioned at the both sides for cutting mating plate 112.
The installation position 115a of photo-coupler transmitting terminal, and light are respectively provided with the upside of first mounting seat 111a and the second mounting seat 111b
The installation position 115b of coupler receiving terminal.
The frequency of the transmission signal of photo-coupler 115 is identical with the rotational frequency of motor 111.
When the light that light source 110 is sent is irradiated to measurement air chamber 10b by the second loophole 112b, the first loophole 112a
Relative with photo-coupler 115, the signal of the transmitting terminal transmitting of photo-coupler 115 is optically coupled by the first loophole 112a
Device receiving terminal is received, and photo-coupler receiving terminal receives signal, and exports high level signal.
With the rotation of motor 111, the also concomitant rotation of mating plate 112 is cut, when the light that light source 110 is sent passes through the first loophole
When 112a is irradiated to reference to chamber 10a, the first loophole 112a deviates photo-coupler 115, the transmitting terminal transmitting of photo-coupler 115
Signal be blocked, photo-coupler receiving terminal is not received by signal, and exports low level signal.
The level signal of output is sent to processing unit 13 by photo-coupler receiving terminal, and processing unit 13 is according to receiving
Level height judges the reference gas chamber 10a for being just irradiated to cavity 10 at current time, is still irradiated to the measurement gas of cavity 10
In the 10b of room.The light intensity signal that i.e. current time detects carrys out measurement air chamber 10b still from reference gas chamber 10a.
According to Lambert-Beer (Lambert-Beer) law, the absorbance of gas and gas is dense under the same conditions
Spend directly proportional rate relation.
The luminous intensity for the light that can obtain sending from light source 110 by the luminous intensity from reference gas chamber 10a detected,
By the luminous intensity S come measurement air chamber 10b detected, can obtain passing through detection chambers 10b from the light that light source 110 is sent
The luminous intensity R of light after being absorbed by tested gas, the ratio P=S/R of luminous intensity, it is proportional to the concentration of tested gas.
Denoising enhanced processing is carried out to electric signal by processing unit 13, calculated respectively from reference gas chamber 10a and measurement gas
The light intensity signal that room 10b is received, tested gas is calculated according to the relation between the concentration of tested gas and intensity ratio
Concentration.Relation between the concentration and intensity ratio of tested gas is, it is known that relation therebetween obtains when dispatching from the factory
Method is taken to be described in embodiment two.
Referring to Fig. 5, being influenceed to reduce temperature drift to caused by light source, set close to the position of light source module 11
Radiating block 114.Radiating block 114 is made up of the high metal of thermal conductivity, can transmit the heat that light source module 11 is sent.
Because gas is affected by temperature bigger to the absorptivity of infrared light supply, a perseverance is provided with gas analyzer
Greenhouse 14, thermostatic chamber 14 are made using aluminum alloy materials, and there is provided foam on inwall to be incubated, and lower section is provided with heating plate.
Cavity 10, light source module 11 and Optical Receivers 12 are placed in thermostatic chamber 14.
In order to be consistent with the test environment of reality, the shadow to caused by testing result of the error due to environment temperature is reduced
Ring, be generally controlled the temperature of heating plate using radiator valve.So that the temperature change in thermostatic chamber 14 is no more than 2
DEG C, measurement temperature can be made to keep constant, the temperature drift of whole gas analysis instrument can be suppressed well.
Certain gas analyzer also includes power supply, display board or communication part, and this is conventional design, be will not be repeated here.
Embodiment two：
With reference to figure 5-8, a kind of analysis method for gases, applied in the gas analyzer described in embodiment one, including with
Lower step：
S1：The tested gas of concentration known is filled with measurement air chamber 10b, in the present embodiment using tested gas as SO2
It is illustrated；
S2：N2 is filled with reference gas chamber 10a；
S3：In the cycle of light source 110, alternately irradiation reference gas chamber 10a and measurement air chamber 10b, it is known that the tested gas of concentration
The light that SO2 is sent to light source 110 absorbs, and reference gas N2 is to the light that light source 110 is sent without absorbing；
S4：Reference gas chamber 10a, measurement air chamber 10b signals are detected by miniflow infrared gas detection device 123, by micro-
Flow infrared gas detection device 123 (such as SO2 miniflows infrared sensor) and receive and inhaled from what measurement air chamber 10b was projected by SO2
The strength S of the light of receipts, received by miniflow infrared gas detection device 123 (such as SO2 miniflows infrared sensor) from reference cavity
The intensity R without the light by absorbing that room 10a is projected；
S5：Calculate reference gas chamber 10a, measurement air chamber 10b output signal strength ratios P, P=S/R：
Specifically, the tested gas by being repeatedly filled with different concentration known C, can obtain multigroup P values.
These different concentration known C tested gas is the gas of high-precision concentration known, the quilt of these concentration knowns
Survey the maximum scale value (hereinafter referred to as " FS " that gas generally comprises measurement range.) 0%, and 100% or other concentration
SO2 gases.The maximum scale value (hereinafter referred to as " FS " that some can also be set to include measurement range.) 15%, 30%, 60%
The SO2 gases of concentration, table 1 below are the experimental data that determines during actual experiment:
Table 1：
It is exportable such as accompanying drawing 6 by oscillograph when reference gas chamber 10b is passed through N2, and measurement air chamber 10a is not passed through tested gas
Oscillogram, it is known that reference gas chamber 10b, measurement air chamber 10a waveforms output are basically identical, and difference is small；
It is exportable such as accompanying drawing 7 by oscillograph when reference gas chamber 10b is passed through N2, and measurement air chamber 10a is passed through tested gas
Oscillogram, it is known that reference gas chamber 10b, measurement air chamber 10a waveform outputs are variant.
S6：Reference gas chamber, the signal intensity rate for measuring air chamber and known quilt are gone out by differential technique/least square fitting
The relational expression surveyed between gas concentration；
Five groups of given datas in table 1, the concentration C of tested gas can be fitted with differential technique/least square method
With the relation between reference gas chamber 10a, measurement air chamber 10b output signal strength ratios P, accompanying drawing 8 is seen：
C=0.0004P3-1.4584P2+15557.2P-529771
S7：After instrument dispatches from the factory, reality is passed through tested gas when measuring, and is calculated according to the step S6 relational expressions determined and is tested gas
Bulk concentration.
In summary, the analysis method for gases that the present embodiment provides, can accurately measure the concentration of tested gas.
Specific embodiment described in the utility model is only to the utility model spirit explanation for example.This practicality
New person of ordinary skill in the field can make various modifications or supplement or adopt to described specific embodiment
Substituted with similar mode, but without departing from spirit of the present utility model or surmount model defined in appended claims
Enclose.
Claims (12)
- A kind of 1. gas analyzer, it is characterised in that including：An at least cavity, dividing plate is set along the central axis of cavity, and cavity is divided into reference gas chamber and measurement air chamber；Light source module, it is arranged at one end of cavity；Miniflow infrared gas detection device, launch for detecting light source module and pass through the light intensity of cavity, be arranged at the another of cavity One end.
- 2. gas analyzer according to claim 1, it is characterised in that dividing plate is identical with the length of cavity, and dividing plate is by cavity It is separated into the same or similar reference gas chamber of size and shape and measurement air chamber.
- 3. gas analyzer according to claim 1, it is characterised in that miniflow infrared gas detection device include preceding air chamber, Rear gas chamber, miniflow infrared sensor, the water transportation device of influence for eliminating moisture.
- 4. gas analyzer according to claim 1, it is characterised in that light source module includes light source, motor, cuts mating plate.
- 5. gas analyzer according to claim 3, it is characterised in that water transportation device includes water adjusting valve, water transfer buffer air chamber And for connecting the connecting pipe of water transfer buffer air chamber and front and rear air chamber.
- 6. according to the gas analyzer described in any claim of claim 3 or 5, it is characterised in that the preceding air chamber, rear gas The direction of propagation for the light that room, water transportation device are sent along light source module successively is configured.
- 7. gas analyzer according to claim 6, it is characterised in that preceding air chamber, rear gas chamber, water adjusting valve, water transfer buffering gas The direction of propagation for the light that room is sent along light source module successively is configured.
- 8. gas analyzer according to claim 4, it is characterised in that cut mating plate and be connected by the second mounting seat with cavity Connect, by snapping connection between cavity and the second mounting seat.
- 9. gas analyzer according to claim 8, it is characterised in that cut and the first loophole and second are provided with mating plate Loophole, mating plate uniform rotation under the drive of motor is cut, the cycle, the light that the light source is sent alternately is passed through into the first printing opacity Hole irradiation is stated in reference gas chamber, and the light that light source is sent is irradiated in measurement air chamber by the second loophole.
- 10. gas analyzer according to claim 4, it is characterised in that light source module also includes a photo-coupler, is used for Judge current time is just irradiated to reference gas chamber, is still irradiated to measurement air chamber.
- 11. gas analyzer according to claim 1, it is characterised in that be also close to light source die including radiating block, radiating block Block, for being radiated to light source module.
- 12. gas analyzer according to claim 11, it is characterised in that also including thermostatic chamber, cavity, light source module and Miniflow infrared gas detection device is placed in thermostatic chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721047840.9U CN207147966U (en) | 2017-08-21 | 2017-08-21 | Gas analyzer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721047840.9U CN207147966U (en) | 2017-08-21 | 2017-08-21 | Gas analyzer |
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| CN207147966U true CN207147966U (en) | 2018-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721047840.9U Withdrawn - After Issue CN207147966U (en) | 2017-08-21 | 2017-08-21 | Gas analyzer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389585A (en) * | 2017-08-21 | 2017-11-24 | 湖北锐意自控系统有限公司 | A kind of gas analyzer and analysis method for gases |
| CN109342347A (en) * | 2018-11-05 | 2019-02-15 | 安徽建筑大学 | A kind of multi-mode gas analyzing apparatus and analysis method |
-
2017
- 2017-08-21 CN CN201721047840.9U patent/CN207147966U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389585A (en) * | 2017-08-21 | 2017-11-24 | 湖北锐意自控系统有限公司 | A kind of gas analyzer and analysis method for gases |
| WO2019037648A1 (en) * | 2017-08-21 | 2019-02-28 | 湖北锐意自控系统有限公司 | Gas analyzer and gas analyzing method |
| CN107389585B (en) * | 2017-08-21 | 2019-11-15 | 湖北锐意自控系统有限公司 | A kind of gas analyzer and analysis method for gases |
| CN109342347A (en) * | 2018-11-05 | 2019-02-15 | 安徽建筑大学 | A kind of multi-mode gas analyzing apparatus and analysis method |
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