CN107966409A - Gas concentration analysis method and device - Google Patents
Gas concentration analysis method and device Download PDFInfo
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- 238000004458 analytical method Methods 0.000 title claims abstract description 28
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- 238000000862 absorption spectrum Methods 0.000 claims abstract description 9
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- 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
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Abstract
The present invention provides a kind of gas concentration analysis method and device, it is related to gas concentration analysis technical field, which includes：Light source, collimater, gas compartment, dispersing instrument, measuring instrument, wherein, gas compartment is sealed with tested gas；Light source is used for the light for sending the characteristic absorption spectrum of the tested gas of covering；Collimater is used to be irradiated to gas compartment after the light that light source is sent is collimated；The light that dispersing instrument is used to pass through gas compartment is into line convergence and dispersion, so that the convergent point of the light of different wave length is spread in the target direction, wherein, target direction is light from the direction of propagation after dispersing instrument outgoing；Measuring instrument is used for the luminous energy that different convergent points are received by movement in the target direction, and the concentration for being tested gas is analyzed according to the luminous energy of convergent point.The present invention, which alleviates, carries out in the conventional method of concentration analysis the tested gas of gas compartment sealing, and the technical problem that spectral resolution is mutually restricted with signal-to-noise ratio, improves the ability to trace gas detection.
Description
Technical field
The present invention relates to gas concentration analysis technical field, more particularly, to a kind of gas concentration analysis method and device.
Background technology
Optical absorption method based on Lambert-Beer's law is one of basic skills of gas detection, is determined based on Lambert-Beer
The carried out continuous absorption spectroscopic gas detection of rule has the characteristics that strong antijamming capability, particularly suitable under complex background environment
Gas detection.Wherein, the continuous absorption spectroscopic gas that gas collected by confining gas room carries out is detected, had in scientific research field
It is widely used.
The common method that is detected to continuous absorption spectroscopic gas in confining gas room be using prism color dispersion-type or
Grating dispersion type spectrometer carries out spectra collection, and the spectrometer of both types has the entrance slit of a light wave.Slit is got over
Narrow, the spectral resolution of spectrometer is higher；But relatively narrow slit can cause the decline of light energy, so that spectrum noise
Than relatively low, it is difficult to meet the detection demand of minimum gas.In traditional gas concentration analysis, spectral resolution and signal-to-noise ratio phase
The technical problem mutually restricted have impact on the accuracy of gas detection.
For in traditional gas concentration analysis, technical problem that spectral resolution is mutually restricted with signal-to-noise ratio, at present
Lack effective solution.
The content of the invention
In view of this, it is an object of the invention to provide a kind of gas concentration analysis method and device, to alleviate to gas
The tested gas of room sealing is carried out in the conventional method of concentration analysis, and spectral resolution is asked with the technology that signal-to-noise ratio mutually restricts
Topic.
In a first aspect, an embodiment of the present invention provides a kind of gas concentration analytical equipment, including：Light source, collimater, gas
Room, dispersing instrument, measuring instrument, wherein,
The gas compartment is sealed with tested gas；
The light source is used for the light for sending the characteristic absorption spectrum for covering the tested gas；
The collimater is used to be irradiated to the gas compartment after the light that the light source is sent is collimated；
The light that the dispersing instrument is used to pass through the gas compartment is into line convergence and dispersion, so that the meeting of the light of different wave length
Accumulation is spread in the target direction, wherein, the target direction for light from the dispersing instrument outgoing after the direction of propagation；
The measuring instrument is used for the luminous energy that the different convergent points is received by the movement on the target direction,
And the concentration of the tested gas is analyzed according to the luminous energy of the convergent point.
With reference to first aspect, an embodiment of the present invention provides the first possible embodiment of first aspect, wherein, institute
It is point light source to state light source.
With reference to first aspect, an embodiment of the present invention provides second of possible embodiment of first aspect, wherein, institute
The convergent lens that dispersing instrument is refraction type is stated, the convergent lens makes the different convergent points by optical wavelength in the lens
Optical axis direction is sequentially distributed.
Second of possible embodiment with reference to first aspect, an embodiment of the present invention provides the third of first aspect
Possible embodiment, wherein, the measuring instrument includes：Diaphragm, positioner, optical detector and signal processor, wherein,
The position of opening of the diaphragm is arranged on the optical axis of the lens, and the positioner is used to control the light
Door screen is moved in the optical axis direction of the lens, so that the diaphragm is moved at the different convergent points；
The optical detector is used to detect the light through the diaphragm, and the light detected is converted into telecommunications
Number；
The signal processor is connected with the optical detector, for receiving the electric signal of the optical detector conversion, and
The concentration of the tested gas is calculated according to the electric signal.
The third possible embodiment with reference to first aspect, an embodiment of the present invention provides the 4th kind of first aspect
Possible embodiment, wherein, the perforate of the diaphragm is the circular hole opened on light-proof material.
The third possible embodiment with reference to first aspect, an embodiment of the present invention provides the 5th kind of first aspect
Possible embodiment, wherein, the positioner is the voice coil motor of hollow circuit cylinder formula, and the diaphragm is installed on the sound
Enclose on the cylinder end face of motor, and the perforate of the diaphragm is embedded the hollow space in the voice coil motor.
The third possible embodiment with reference to first aspect, an embodiment of the present invention provides the 6th kind of first aspect
Possible embodiment, wherein, the optical detector is single pixel photodetector.
With reference to first aspect, an embodiment of the present invention provides the 7th kind of possible embodiment of first aspect, wherein, institute
Stating collimater includes refraction type achromatism collimating mirror or total reflection collimating mirror.
Second aspect, the embodiment of the present invention also provide a kind of gas concentration analysis method, including：
Collimation step, gas compartment is irradiated to after the light that light source is sent is collimated, wherein, the gas compartment is sealed with tested gas
Body, the light that the light source is sent cover the characteristic absorption spectrum of the tested gas；
Dispersion step, the light passed through to the gas compartment is into line convergence and dispersion, so that the convergent point of the light of different wave length
Spread in the target direction, wherein, the target direction for light from dispersing instrument outgoing after the direction of propagation；
Measuring process, receives the luminous energy of the different convergent points on target direction, and according to the luminous energy pair of the convergent point
The concentration of the tested gas is analyzed.
With reference to second aspect, an embodiment of the present invention provides the first possible embodiment of second aspect, wherein, gas
Bulk concentration analysis method further includes：
Constitution step, for being used for by simple lens or lens set constructor dispersing instrument, the dispersing instrument to the gas compartment
The light of transmission is into line convergence and dispersion, so that the spacing of the convergent point meets default distance values.
The embodiment of the present invention brings following beneficial effect：
The gas concentration analytical equipment, including：Light source, collimater, gas compartment, dispersing instrument, measuring instrument, wherein, gas compartment
It is sealed with tested gas；Light source is used for the light for sending the tested gas characteristic absorption spectrum of covering；Collimater is used to send light source
Light collimation after be irradiated to gas compartment；The light that dispersing instrument is used to pass through gas compartment is into line convergence and dispersion, so that different wave length
The convergent point of light spread in the target direction, wherein, target direction is light from the direction of propagation after dispersing instrument outgoing；Measuring instrument
For receiving the luminous energy of different convergent points by movement in the target direction, and according to the luminous energy of convergent point to being tested gas
The concentration of body is analyzed.
First, the gas concentration analytical equipment is using the light that light source is sent as incident light, with traditional chromatograph slit transmission
Light in environment is compared, and the light that light source is sent has larger luminous flux, is conducive to improve the light energy of convergent point, so as to be lifted
The signal-to-noise ratio of trace gas detection.Secondly, the light that light source is sent can to all the winds dissipate, and gas is irradiated to after collimater collimation
Room so that dispersing instrument can be by the light that gas compartment passes through into line convergence, still to be realized by convergent point to being tested the dense of gas
Spend the purpose analyzed；And convergent point is spread in the target direction, target direction for light from the dispersing instrument outgoing after biography
Direction is broadcast, measuring instrument receives the luminous energy of the different convergent points by movement in the target direction, so that measuring instrument is every
The luminous energy of the secondary simply convergent point received, improves the precision to the detection of different convergent point luminous energy, i.e. improve spectrum
Resolution ratio.Thus, which alleviates in traditional gas concentration analysis device, spectral resolution and signal-to-noise ratio
The technical problem mutually restricted.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in describing below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
Put, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of structure diagram for gas concentration analytical equipment that the embodiment of the present invention one provides；
Fig. 2 is a kind of index path for gas concentration analytical equipment that the embodiment of the present invention one provides；
Fig. 3 is a kind of chromatic dispersion principle figure for dispersing instrument that the embodiment of the present invention one provides；
Fig. 4 is a kind of flow chart of gas concentration analysis method provided by Embodiment 2 of the present invention；
Fig. 5 is the flow chart of another gas concentration analysis method provided by Embodiment 2 of the present invention.
Icon：1- light sources；2- collimaters；3- gas compartments；4- dispersing instruments；5- measuring instruments；51- diaphragms；52- positions control
Device；53- optical detectors；54- signal processors.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiment is part of the embodiment 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
Lower all other embodiments obtained, belong to the scope of protection of the invention.
In the conventional method that concentration analysis is carried out to gas compartment interior sealing gas, spectral resolution is mutually restricted with signal-to-noise ratio
Technical problem have impact on gas detection accuracy.Based on this, a kind of gas concentration analysis side provided in an embodiment of the present invention
Method and device, can alleviate in traditional gas concentration analysis, the technical problem that spectral resolution is mutually restricted with signal-to-noise ratio.
Embodiment one
As shown in Fig. 1 to Fig. 4, an embodiment of the present invention provides a kind of gas concentration analytical equipment.
With reference to Fig. 1, which includes：Light source 1, collimater 2, gas compartment 3, dispersing instrument 4, measuring instrument 5,
Wherein,
Gas compartment 3 is sealed with tested gas；
Light source 1 is used for the light for sending the characteristic absorption spectrum of the tested gas of covering；
Collimater 2 is used to be irradiated to gas compartment 3 after the light that light source 1 is sent is collimated；
The light that dispersing instrument 4 is used to pass through gas compartment 3 is into line convergence and dispersion, so that the convergent point of the light of different wave length exists
Spread on target direction, wherein, target direction is light from the direction that dispersing instrument 4 is emitted；
Measuring instrument 5 is used for the luminous energy that different convergent points is received by movement in the target direction, and according to convergence
The luminous energy of point analyzes the concentration for being tested gas.
Specifically, Lambert-Beer's law (Beer-Lambert Law) provides A=lg (1/T)=Kbc, wherein, A is suction
Luminosity；T is transmittance, is exiting light beam intensity and the ratio of incident intensity；K is the property of molar absorption coefficient, K and extinction material
The wavelength of matter and incident light is related；C is the concentration of extinction material；B is extinction material thickness.Lambert-Beer's law shows：When one
When beam collimated monochromatic ligth is perpendicular through a certain uniformly non-scatter extinction material, the concentration c and suction of its absorbance A and extinction material
Stimulative substance thickness b is directly proportional, and light transmittance T is inversely proportional with c, b；Moreover, for the light of different wave length, it is identical in c, b value
In the case of, light transmittance T is different.
Thus, gas with various absorbs the light of different wave length after the illumination that light source 1 is sent is mapped to gas compartment 3, in gas compartment 3,
Same gas compartment 3 is passed through based on the light that light source 1 is sent, i.e. the absorber thickness b of different extinction materials is identical, so that different
The light transmittance T and the concentration c of corresponding extinction material of wavelength light are inversely proportional, and further, dispersing instrument 4 converges at the light of different wave length
After the different convergent points spread on target direction, measuring instrument 5 is by measuring the luminous energy of different convergent points, you can draws and convergent point
The extinction material concentration c of respective wavelength light.
It should be noted that although the light that light source 1 is sent can go out from all quarter with larger luminous flux, light
Penetrate, collimater 2 is irradiated to gas compartment 3 after the light that light source 1 is sent is collimated, and not only causes the light that light source 1 is sent more fully
Irradiation gas compartment 3 is utilized, also so that the light transmitted from gas compartment 3 is converged and is achieved, then by convergent point still
Realize the purpose analyzed the concentration for being tested gas.
Dispersing instrument 4, into line convergence and dispersion, makes the convergent point of light of different wave length in target side to the light that gas compartment 3 passes through
Spread upwards and form spectrum, measuring instrument 5 receives the luminous energy of different convergent points by movement in the target direction, in measuring instrument
5 when being moved to a convergent point position on target direction, then the energy of current convergent point is only received, so as to be lifted to each
The precision of convergent point luminous energy detection, i.e. lifting spectral resolution.
The gas concentration analytical equipment that the embodiment of the present invention is provided is before use, first by the gas of the concentration to be analyzed of sampling observation
It is charged in gas compartment 3, after gas compartment 3 then is put into collimater 2, collimater 2 is irradiated to after the light that light source 1 is sent is collimated
Gas compartment 3, realizes and carries out concentration analysis to the tested gas in gas compartment 3.
In embodiments of the present invention, first, the gas concentration analytical equipment is using the light that light source 1 is sent as incident light, with
Light in traditional chromatograph slit transmission environment is compared, and the light that light source 1 is sent has larger luminous flux, is conducive to improve and is assembled
The light energy of point, so as to lift the signal-to-noise ratio of trace gas detection.Secondly, the light that light source 1 is sent can to all the winds dissipate, accurate
Straight device 2 is irradiated to gas compartment 3 after collimating, dispersing instrument 4 can by the light that gas compartment 3 passes through into line convergence, with by convergent point still
So realize the purpose analyzed the concentration for being tested gas；And convergent point is spread in the target direction, target direction for light from
The direction of propagation after the outgoing of dispersing instrument 4, measuring instrument 5 receive the luminous energy of different convergent points by movement in the target direction,
So as to the luminous energy for the simply convergent point that measuring instrument 5 receives every time, so as to lift the essence to the detection of different convergent point luminous energy
Degree, i.e. lifting spectral resolution.Thus, which divides the governing factor of signal-to-noise ratio and spectral resolution
Leave, realize while lift signal-to-noise ratio and the purpose of spectral resolution, alleviate in traditional gas concentration analysis device, spectrum
The technical problem that resolution ratio is mutually restricted with signal-to-noise ratio, improves to being tested what gas concentration was analyzed in confining gas room 3
Accuracy.
In one optional embodiment of the embodiment of the present invention, light source 1 is point light source.
Specifically, light source 1 is point light source, i.e. light source 1 is spatially without extension.The light warp that convergent point sends for point light source
Collimater 2 collimates, is formed after the convergence and dispersion of dispersing instrument 4, i.e. and convergent point is the picture point of point light source, thus, convergent point
Also it is a spatially point without extension.
It is emphasized that " point light source " this concept physically refers to a luminous point for disregarding size, i.e. luminous point
The essence of diameter smaller closer " point light source ".For the light source 1 that luminous point is larger, an aperture can be added near luminous point
Diaphragm, i.e. the place that the diverging of lower degree is carried out in the light that luminous point is sent adds an aperture, so that luminous point passes through
Light beam after aperture is similar to the light beam sent from a point light source.Wherein, aperture is nearer from luminous point, is more beneficial to
The relatively multi-energy of luminous point passes through aperture；The diameter of aperture is smaller to be more beneficial to obtain the preferable point light source of quality.
In the embodiment of the present invention, light source 1 is point light source, and convergent point is also a spatially point without extension, i.e. convergent point
Energy is spatially also relatively concentrated, so that, on the one hand, the intensity of illumination of convergent point is larger, micro- based on convergent point energy measuring
In the case of measuring gas concentration, be conducive to the signal-to-noise ratio that measuring instrument 5 lifts trace gas detection；On the other hand, the face of convergent point
Product is smaller, is conducive to measuring instrument 5 and is received the energy of convergent point comprehensively, i.e. the energy of convergent point is carried out relatively accurate inspection
Survey.
In another optional embodiment of the embodiment of the present invention, with reference to Fig. 2, dispersing instrument 4 is the convergent lens of refraction type,
Convergent lens makes different convergent points be sequentially distributed by optical axis direction of the optical wavelength in lens.
Specifically, have not to the light of different wave length referring to Fig. 3, same lens (that is, the convergent lens of above-mentioned refraction type)
With the focal length of size, i.e. the directional light comprising different wave length is converged at the different focal point after lens after same lens,
Shown in Fig. 3 is that directional light includes three kinds of wavelength Xs1、λ2、λ3Situation, the light of these three wavelength converges at three differences of lens
Focus A, B, C.
In the embodiment of the present invention, the light that gas compartment 3 passes through incides lens, and the light that gas compartment 3 passes through is directional light, because
And lens make different convergent points be sequentially distributed by optical axis direction of the optical wavelength in lens.In the embodiment of the present invention, dispersing instrument 4
Being realized using the convergent lens of refraction type makes different convergent points spread in the target direction.
In another optional embodiment of the embodiment of the present invention, as shown in Fig. 2, measuring instrument 5 includes：Diaphragm 51, position
Controller 52, optical detector 53 and signal processor 54, wherein,
The position of opening of diaphragm 51 is arranged on the optical axis of lens, and positioner 52 is used to control diaphragm 51 in lens
Optical axis direction moves, so that diaphragm 51 is moved at different convergent points；
Optical detector 53 is used to detect the light through diaphragm 51, and the light detected is converted into electric signal；
Signal processor 54 and optical detector 53 connect, for receiving the electric signal of the conversion of optical detector 53, and according to electricity
Signal calculates the concentration of tested gas.
In the embodiment of the present invention, diaphragm 51 is controlled by positioner 52 and moved in optical axis direction, is realized saturating to diaphragm 51
The convergent point for crossing light wave makes choice；Optical detector 53 is set to detect the energy of convergent point at 51 rear of diaphragm, so as to fulfill suction
Receive the detection of spectrum；Signal processor 54 handles absorption spectrum, calculates tested gas concentration.
In another optional embodiment of the embodiment of the present invention, the perforate of diaphragm 51 is opened on light-proof material
Circular hole.
It should be noted that the perforate of diaphragm 51 can be the hole of no any material, or made by light transmissive material
Into hole.Further, can be according to the converging light of current convergent point institute to be measured when a convergent point printing opacity energy is measured
Ripple selects light transmission piece, and light transmission piece assembles light wave to current convergent point to be measured has high light transmission features, and for other light waves
With low light transmission characteristic, so that it is mostly that current convergent point to be measured is understood to be conducive to make through the energy of the light of diaphragm 51
The energy of optically focused ripple, is of great significance for lifting spectral resolution.
In another optional embodiment of the embodiment of the present invention, referring to Fig. 2, positioner 52 is hollow circuit cylinder formula
Voice coil motor, diaphragm 51 is installed on the cylinder end face of voice coil motor, and the perforate of diaphragm 51 is embedded in the hollow of voice coil motor
Part, is incided in optical detector 53 so that the light of light transmissive aperture 51 is all appeared from the hollow space of voice coil motor.
In another optional embodiment of the embodiment of the present invention, optical detector 53 is single pixel photodetector, single picture
First photodetector only measures the energy at convergent point, i.e., the light energy of single pixel photodetector measurement is simply assembled
The light energy of point, so as to be conducive to accurately calculate tested gas concentration.
In another optional embodiment of the embodiment of the present invention, collimater 2 include refraction type achromatism collimating mirror or
Collimating mirror is totally reflected, the collimater 2 shown in Fig. 2 uses refraction type achromatism collimating mirror.
Embodiment two
A kind of gas concentration analysis method provided in an embodiment of the present invention, as shown in figure 4, including：
Step S1, collimation step, will be irradiated to gas compartment after light that light source is sent collimation, wherein, gas compartment be sealed with by
Gas is surveyed, the characteristic absorption spectrum for the tested gas of light covering that light source is sent；
Step S2, dispersion step, the light passed through to gas compartment is into line convergence and dispersion, so that the convergence of the light of different wave length
Point spread in the target direction, wherein, target direction for light from dispersing instrument outgoing after the direction of propagation；
Step S3, measuring process receive the luminous energy of different convergent points on target direction, and according to the luminous energy of convergent point to quilt
The concentration for surveying gas is analyzed.
In embodiments of the present invention, collimation step is saturating with traditional chromatograph slit using the light that light source is sent as incident light
The light penetrated in environment is compared, and the light that light source is sent has larger luminous flux, is conducive to improve the light energy of convergent point, so as to carry
Rise the signal-to-noise ratio of trace gas detection.Secondly, the light that light source is sent can to all the winds dissipate, and collimation step sends light source
Gas compartment is irradiated to after light collimation；Dispersion step to the light that gas compartment passes through into line convergence and dispersion so that the light of different wave length
Convergent point spread in the target direction, wherein, target direction for light from dispersing instrument outgoing after the direction of propagation；Then, measure
Step carries out the concentration for being tested gas according to the luminous energy of convergent point by receiving the luminous energy of different convergent points on target direction
Analysis, so that the luminous energy for the simply convergent point that measuring instrument receives every time, improves to the detection of different convergent point luminous energy
Precision, i.e. improve spectral resolution.Thus, which alleviates in traditional gas concentration analysis device,
The technical problem that spectral resolution is mutually restricted with signal-to-noise ratio, improves and divides being tested gas concentration in confining gas room 3
The accuracy of analysis.
In one optional embodiment of the embodiment of the present invention, as shown in figure 5, the gas concentration analysis method further includes：
Step S4, constitution step, by simple lens or lens set constructor dispersing instrument, dispersing instrument is used for what gas compartment was passed through
Light is into line convergence and dispersion, so that the spacing of convergent point meets default distance values.
Specifically, the dispersing instrument of step S4 constructions is used in step S2.Step S4 passes through simple lens or lens set constructor color
Instrument is dissipated, dispersing instrument can cause convergent point to spread in various degree because of factors such as the radius of curvature of lens, manufacture materials, i.e. make
The spacing for obtaining convergent point meets default distance values.Wherein, since the spacing of convergent point is bigger, the influence of illumination between convergent point
Smaller, the setting of default distance values can be determined because of the requirement of illumination effect between convergent point, be not specifically limited here.
In the embodiment of the present invention, by simple lens or lens set constructor dispersing instrument, made according to actual conditions between convergent point
Away from default distance values are met, be conducive to adjust the spacing of convergent point, reduce the influence of illumination between convergent point.
The gas concentration analysis method and the computer program product of device that the embodiment of the present invention is provided, including store
The computer-readable recording medium of program code, the instruction that said program code includes can be used for performing in previous methods embodiment
The method, specific implementation can be found in embodiment of the method, and details are not described herein.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
With the specific work process of device, the corresponding process in preceding method embodiment is may be referred to, details are not described herein.
In addition, in the description of the embodiment of the present invention, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
If the function is realized in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
The part to contribute to the prior art or the part of the technical solution can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be
People's computer, server, or network equipment etc.) perform all or part of step of each embodiment the method for the present invention.
And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
In the description of the present invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Easy to describe the present invention and simplify description, rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
In addition, term " first ", " second ", " the 3rd " are only used for description purpose, and it is not intended that instruction or implying phase
To importance.
Finally it should be noted that：Embodiment described above, is only the embodiment of the present invention, to illustrate the present invention
Technical solution, rather than its limitations, protection scope 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, it will be understood by those of ordinary skill in the art that：Any one skilled in the art
The invention discloses technical scope in, it can still modify the technical solution described in previous embodiment or can be light
It is readily conceivable that change, or equivalent substitution is carried out to which part technical characteristic；And these modifications, change or replacement, do not make
The essence of appropriate technical solution departs from the spirit and scope of technical solution of the embodiment of the present invention, should all cover the protection in the present invention
Within the scope of.Therefore, protection scope of the present invention answers the scope of the claims of being subject to.
Claims (10)
- A kind of 1. gas concentration analytical equipment, it is characterised in that including：Light source, collimater, gas compartment, dispersing instrument, measuring instrument, Wherein,The gas compartment is sealed with tested gas；The light source is used for the light for sending the characteristic absorption spectrum for covering the tested gas；The collimater is used to be irradiated to the gas compartment after the light that the light source is sent is collimated；The light that the dispersing instrument is used to pass through the gas compartment is into line convergence and dispersion, so that the convergent point of different wavelengths of light exists Spread on target direction, wherein, the target direction for light from the dispersing instrument outgoing after the direction of propagation；The measuring instrument is used for the luminous energy that the different convergent points is received by the movement on the target direction, and root The concentration of the tested gas is analyzed according to the luminous energy of the convergent point.
- 2. device according to claim 1, it is characterised in that the light source is point light source.
- 3. device according to claim 1, it is characterised in that the dispersing instrument be refraction type convergent lens, the meeting Poly- lens make the different convergent points be sequentially distributed by optical axis direction of the optical wavelength in the lens.
- 4. device according to claim 3, it is characterised in that the measuring instrument includes：Diaphragm, positioner, light are visited Device and signal processor are surveyed, wherein,The position of opening of the diaphragm is arranged on the optical axis of the lens, and the positioner is used to control the diaphragm to exist The optical axis direction movement of the lens, so that the diaphragm is moved at the different convergent points；The optical detector is used to detect the light through the diaphragm, and the light detected is converted into electric signal；The signal processor is connected with the optical detector, the electric signal converted for receiving the optical detector, and according to The electric signal calculates the concentration of the tested gas.
- 5. device according to claim 4, it is characterised in that the perforate of the diaphragm is opened on light-proof material Circular hole.
- 6. device according to claim 4, it is characterised in that the positioner is electric for the voice coil loudspeaker voice coil of hollow circuit cylinder formula Machine, the diaphragm is installed on the cylinder end face of the voice coil motor, and the perforate of the diaphragm is embedded in the voice coil motor Hollow space.
- 7. device according to claim 4, it is characterised in that the optical detector is single pixel photodetector.
- 8. device according to claim 1, it is characterised in that the collimater include refraction type achromatism collimating mirror or It is totally reflected collimating mirror.
- A kind of 9. gas concentration analysis method, it is characterised in that including：Collimation step, gas compartment is irradiated to after the light that light source is sent is collimated, wherein, the gas compartment is sealed with tested gas, The light that the light source is sent covers the characteristic absorption spectrum of the tested gas；Dispersion step, the light passed through to the gas compartment is into line convergence and dispersion, so that the convergent point of the light of different wave length is in mesh Mark direction on spread, wherein, the target direction for light from dispersing instrument outgoing after the direction of propagation；Measuring process, receives the luminous energy of the different convergent points on the target direction, and according to the luminous energy pair of the convergent point The concentration of the tested gas is analyzed.
- 10. according to the method described in claim 9, it is characterized in that, further include：Constitution step, for by simple lens or lens set constructor dispersing instrument, the dispersing instrument to be used to pass through the gas compartment Light into line convergence and dispersion so that the spacing of the convergent point meets default distance values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711498386.3A CN107966409A (en) | 2017-12-29 | 2017-12-29 | Gas concentration analysis method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711498386.3A CN107966409A (en) | 2017-12-29 | 2017-12-29 | Gas concentration analysis method and device |
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| CN107966409A true CN107966409A (en) | 2018-04-27 |
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ID=61993428
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711498386.3A Pending CN107966409A (en) | 2017-12-29 | 2017-12-29 | Gas concentration analysis method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110618102A (en) * | 2019-09-25 | 2019-12-27 | 成都太阳神鸟智能控制有限公司 | Gas detection method and device based on dispersion spectrum analysis and artificial intelligence |
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