CN207798648U - Gas concentration analytical equipment - Google Patents
Gas concentration analytical equipment Download PDFInfo
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- CN207798648U CN207798648U CN201721925944.5U CN201721925944U CN207798648U CN 207798648 U CN207798648 U CN 207798648U CN 201721925944 U CN201721925944 U CN 201721925944U CN 207798648 U CN207798648 U CN 207798648U
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Abstract
The utility model provides a kind of gas concentration analytical equipment, is related to gas concentration analysis technical field, which includes：Light source, collimator, gas compartment, dispersing instrument, measuring instrument, wherein gas compartment is sealed with tested gas；Light source is used to send out the light for the characteristic absorption spectrum that covering is tested gas；Collimator is used to be irradiated to gas compartment after collimating the light that light source is sent out；The light that dispersing instrument is used to penetrate 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 be light from dispersing instrument be emitted after the direction of propagation；Measuring instrument is used to receive the luminous energy of different convergent points by movement in the target direction, and is analyzed the concentration for being tested gas according to the luminous energy of convergent point.The technical issues of the utility model alleviates in the conventional method for carrying out concentration analysis to the tested gas that gas compartment seals, and spectral resolution is mutually restricted with signal-to-noise ratio, improves the ability to trace gas detection.
Description
Technical field
The utility model is related to gas concentration analysis technical fields, more particularly, to a kind of gas concentration analytical equipment.
Background technology
Optical absorption method based on Lambert-Beer's law is one of the basic skills of gas detection, fixed 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, is had in scientific research field
It is widely used.
The method that commonly continuous absorption spectroscopic gas in confining gas room is detected be using prism color dispersion-type or
Grating dispersion type spectrometer carries out spectra collection, and there are one the entrance slits of light wave for the spectrometer of both types.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
It is 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 issues of mutually restricting affects the accuracy of gas detection.
For the technical issues of in traditional gas concentration analysis, spectral resolution is mutually restricted with signal-to-noise ratio, at present
Lack effective solution scheme.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of gas concentration analysis method and device, with alleviation pair
The tested gas of gas compartment sealing carries out in the conventional method of concentration analysis, the technology that spectral resolution is mutually restricted with signal-to-noise ratio
Problem.
In a first aspect, the utility model embodiment provides a kind of gas concentration analytical equipment, including：Light source, collimator,
Gas compartment, dispersing instrument, measuring instrument, wherein
The gas compartment is sealed with tested gas；
The light source is used to send out the light for the characteristic absorption spectrum for covering the tested gas；
The collimator is used to be irradiated to the gas compartment after collimating the light that the light source is sent out；
Light of the dispersing instrument for being penetrated to 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 be light from the dispersing instrument outgoing after the direction of propagation；
The measuring instrument is used to receive the luminous energy of the different convergent points 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, the utility model embodiment provides the first possible embodiment of first aspect,
In, the light source is point light source.
With reference to first aspect, the utility model embodiment provides second of possible embodiment of first aspect,
In, the dispersing instrument is the convergent lens of refraction type, and the convergent lens makes the different convergent points by optical wavelength described
The optical axis direction of lens is sequentially distributed.
Second of possible embodiment with reference to first aspect, the utility model embodiment provide the of first aspect
Three kinds of possible embodiments, wherein the measuring instrument includes：Diaphragm, positioner, optical detector and signal processor,
Wherein,
The position of opening of the diaphragm is set on the optical axis of the lens, and the positioner is for controlling 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 converts the light detected to telecommunications
Number；
The signal processor is connected with the optical detector, the electric signal for receiving 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, the utility model embodiment provide the of first aspect
Four kinds of possible embodiments, wherein the trepanning of the diaphragm is the circular hole opened on light-proof material.
The third possible embodiment with reference to first aspect, the utility model embodiment provide the of first aspect
Five kinds of possible embodiments, wherein the positioner is the voice coil motor of hollow circuit cylinder formula, and the diaphragm is mounted on institute
It states on the cylinder end face of voice coil motor, and the trepanning of the diaphragm is embedded the hollow space in the voice coil motor.
The third possible embodiment with reference to first aspect, the utility model embodiment provide the of first aspect
Six kinds of possible embodiments, wherein the optical detector is single pixel photodetector.
With reference to first aspect, the utility model embodiment provides the 7th kind of possible embodiment of first aspect,
In, the collimator includes refraction type achromatism collimating mirror or total reflection collimating mirror.
Second aspect, the utility model embodiment also provide a kind of gas concentration analysis method, including：
Collimation step is irradiated to gas compartment, wherein the gas compartment is sealed with tested gas after collimating the light that light source is sent out
Body, the light that the light source is sent out cover the characteristic absorption spectrum of the tested gas；
Dispersion step, to the gas compartment penetrate light 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 be 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.
In conjunction with second aspect, the utility model embodiment provides the first possible embodiment of second aspect,
In, gas concentration analysis method further includes：
Constitution step, for constructing dispersing instrument by simple lens or lens group, the dispersing instrument is used for the gas compartment
The light of transmission is into line convergence and dispersion, so that the spacing of the convergent point, which meets, presets distance values.
The utility model embodiment brings following advantageous effect：
The gas concentration analytical equipment, including：Light source, collimator, gas compartment, dispersing instrument, measuring instrument, wherein gas compartment
It is sealed with tested gas；Light source is used to send out the light that covering is tested gas characteristic absorption spectrum；Collimator is for sending out light source
Light collimation after be irradiated to gas compartment；Light of the dispersing instrument for being penetrated to 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
Luminous energy for receiving 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 light which sends out light source is as incident light, with traditional chromatograph slit transmission
Light in environment is compared, and the light that light source is sent out has larger luminous flux, is conducive to the light energy for improving convergent point, to be promoted
The signal-to-noise ratio of trace gas detection.Secondly, the light that light source is sent out can to all the winds dissipate, and gas is irradiated to after collimator collimation
Room so that the light that dispersing instrument can penetrate gas compartment is into line convergence, still 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 be 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, to which measuring instrument is every
The luminous energy of the secondary only convergent point received, improves the precision detected to different convergent point luminous energy, that is, improve spectrum
Resolution ratio.Thus, which alleviates in traditional gas concentration analysis device, spectral resolution and signal-to-noise ratio
The technical issues of mutually restricting.
Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood by implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is realized and is 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 cited below particularly, and
The appended attached drawing of cooperation, is described in detail below.
Description of the drawings
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 implementation mode 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, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of structure diagram for gas concentration analytical equipment that the utility model embodiment one provides；
Fig. 2 is a kind of index path for gas concentration analytical equipment that the utility model embodiment one provides；
Fig. 3 is a kind of chromatic dispersion principle figure for dispersing instrument that the utility model embodiment one provides；
Fig. 4 is a kind of flow chart for gas concentration analysis method that the utility model embodiment two provides；
Fig. 5 is the flow chart for another gas concentration analysis method that the utility model embodiment two provides.
Icon：1- light sources；2- collimators；3- gas compartments；4- dispersing instruments；5- measuring instruments；51- diaphragms；The positions 52- control
Device；53- optical detectors；54- signal processors.
Specific implementation mode
To keep the purpose, technical scheme and advantage of the utility model embodiment 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 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
The every other embodiment obtained under the premise of creative work, shall fall within the protection scope of the present invention.
In the conventional method for carrying out concentration analysis to gas compartment interior sealing gas, spectral resolution is mutually restricted with signal-to-noise ratio
The technical issues of affect the accuracy of gas detection.Based on this, a kind of gas concentration that the utility model embodiment provides is divided
Method and device is analysed, can be alleviated in traditional gas concentration analysis, the technology that spectral resolution is mutually restricted with signal-to-noise ratio
Problem.
Embodiment one
As shown in fig. 1 to fig. 4, the utility model embodiment provides a kind of gas concentration analytical equipment.
Referring to Fig.1, which includes：Light source 1, collimator 2, gas compartment 3, dispersing instrument 4, measuring instrument 5,
Wherein,
Gas compartment 3 is sealed with tested gas；
Light source 1 is used to send out the light for the characteristic absorption spectrum that covering is tested gas；
Collimator 2 is used to be irradiated to gas compartment 3 after collimating the light that light source 1 is sent out；
Light of the dispersing instrument 4 for being penetrated to gas compartment 3 is into line convergence and dispersion, so that the convergent point of the light of different wave length exists
It is spread on target direction, wherein target direction is light from the direction that dispersing instrument 4 is emitted；
Measuring instrument 5 is used to receive the luminous energy of different convergent points 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 to inhale
Luminosity；T is transmittance, is exiting light beam intensity and the ratio of incident intensity；K is molar absorption coefficient, the property of 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 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 out is mapped to gas compartment 3, in gas compartment 3,
Pass through the same gas compartment 3 based on the light that light source 1 is sent out, that is, the absorber thickness b of different extinction materials is identical, to different
The light transmittance T and the concentration c of corresponding extinction material of wavelength light are inversely proportional, and further, dispersing instrument 4 makes the light of different wave length converge at
After the different convergent points spread on target direction, measuring instrument 5 passes through the luminous energy for measuring different convergent points, you can obtains and convergent point
The extinction material concentration c of respective wavelength light.
It should be noted that although there is the light that light source 1 is sent out larger luminous flux, light can go out from all quarter
It penetrates, collimator 2 is irradiated to gas compartment 3 after collimating the light that light source 1 is sent out, and not only makes the light that light source 1 is sent out more fully
It is utilized irradiation gas compartment 3, but also the light transmitted from gas compartment 3 is converged and is achieved, then still by convergent point
Realize the purpose analyzed the concentration for being tested gas.
The light that dispersing instrument 4 penetrates gas compartment 3 makes the convergent point of the light of different wave length in target side into line convergence and dispersion
It spreads upwards and forms 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 only receives the energy of current convergent point, to be promoted to each
The precision of convergent point luminous energy detection, that is, promote spectral resolution.
The gas concentration analytical equipment that the utility model embodiment is provided is before use, first by the concentration to be analyzed of sampling observation
Gas is charged in gas compartment 3, after gas compartment 3 is then put into collimator 2, is shone after so that collimator 2 is collimated the light that light source 1 is sent out
It is mapped to gas compartment 3, realizes and concentration analysis is carried out to the tested gas in gas compartment 3.
In the utility model embodiment, first, the light which sends out light source 1 is as incidence
Light, compared with the light in traditional chromatograph slit transmission environment, the light that light source 1 is sent out has larger luminous flux, is conducive to carry
The light energy of high convergent point, to promote the signal-to-noise ratio of trace gas detection.Secondly, the light that light source 1 is sent out can be to all the winds
Diverging, collimator 2 are irradiated to gas compartment 3 after collimating, and the light that dispersing instrument 4 can penetrate gas compartment 3 is into line convergence, to pass through meeting
Accumulation still realizes the purpose analyzed the concentration for being tested gas；And convergent point is spread in the target direction, target direction
It is light from the direction of propagation after the outgoing of dispersing instrument 4, measuring instrument 5 receives different convergent points by movement in the target direction
Luminous energy detects different convergent point luminous energy to be promoted to the luminous energy for the only convergent point that measuring instrument 5 receives every time
Precision, that is, promoted spectral resolution.Thus, the gas concentration analytical equipment by the control of signal-to-noise ratio and spectral resolution because
Element separates, and realizes while being promoted the purpose of signal-to-noise ratio and spectral resolution, alleviates in traditional gas concentration analysis device,
The technical issues of 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 utility model embodiment, light source 1 is point light source.
Specifically, light source 1 is point light source, that is, light source 1 is spatially without extension.Convergent point is the light warp that point light source is sent out
Collimator 2 is collimated, is formed by after the convergence and dispersion of dispersing instrument 4, that is, 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, that is, 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, that is, the place that the diverging of lower degree is carried out in the light that luminous point is sent out adds an aperture, so that luminous point penetrates
Light beam after aperture is similar to the light beam sent out from a point light source.Wherein, aperture is closer from luminous point, is more conducive to
The more energy of luminous point passes through aperture；The diameter of aperture is smaller to be more conducive to obtain the preferable point light source of quality.
In the utility model embodiment, light source 1 is point light source, and convergent point is also a spatially point without extension, that is, meeting
Accumulation energy is spatially also relatively concentrated, to, on the one hand, the intensity of illumination of convergent point is larger, is examined based on convergent point energy
In the case of micrometer amount gas concentration, be conducive to the signal-to-noise ratio that measuring instrument 5 promotes trace gas detection；On the other hand, convergent point
Area it is smaller, be conducive to measuring instrument 5 and received the energy of convergent point comprehensively, that is, carry out the energy of convergent point more smart
Really detection.
In another optional embodiment of the utility model embodiment, with reference to Fig. 2, dispersing instrument 4 is the convergence of refraction type
Lens, convergent lens make different convergent points be sequentially distributed in the optical axis direction of lens by optical wavelength.
Specifically, referring to Fig. 3, same lens (that is, convergent lens of above-mentioned refraction type) have not the light of different wave length
With the focal length of size, that is, the directional light comprising different wave length converges at after same lens at the different focal point after lens,
Shown in Fig. 3 is that directional light includes three kinds of wavelength Xs1、λ2、λ3The case where, the light of these three wavelength converges at three differences of lens
Focus A, B, C.
In the utility model embodiment, the light that gas compartment 3 penetrates is incident on lens, and the light that gas compartment 3 penetrates is directional light,
Thus, lens make different convergent points be sequentially distributed in the optical axis direction of lens by optical wavelength.In the utility model embodiment, color
Dissipating instrument 4 and being realized using the convergent lens of refraction type makes different convergent points spread in the target direction.
In another optional embodiment of the utility model embodiment, as shown in Fig. 2, measuring instrument 5 includes：Diaphragm 51,
Positioner 52, optical detector 53 and signal processor 54, wherein
The position of opening of diaphragm 51 is set on the optical axis of lens, and positioner 52 is for controlling 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 converts the light detected to electric signal；
Signal processor 54 and optical detector 53 connect, the electric signal for receiving the conversion of optical detector 53, and according to electricity
Signal calculates the concentration for being tested gas.
In the utility model embodiment, diaphragm 51 is controlled by positioner 52 and is moved in optical axis direction, is realized to diaphragm
51 convergent points for penetrating light wave are selected；At 51 rear of diaphragm, setting optical detector 53 detects the energy of convergent point, to real
The detection of existing absorption spectrum；Signal processor 54 handles absorption spectrum, calculates tested gas concentration.
In another optional embodiment of the utility model embodiment, the trepanning of diaphragm 51 is the institute on light-proof material
The circular hole opened.
It should be noted that the trepanning of diaphragm 51 can be the hole of no any material, or made by translucent material
At hole.It further, can be according to the converging light of current convergent point institute to be measured when measuring a convergent point light transmission energy
Wave selects light transmission piece, light transmission piece to have high light transmission features to current the assembled light wave of convergent point to be measured, and for other light waves
It is mostly that current convergent point to be measured is understood to be conducive to make the energy through the light of diaphragm 51 with low light transmission characteristic
The energy of optically focused wave is of great significance for promoting spectral resolution.
In another optional embodiment of the utility model embodiment, referring to Fig. 2, positioner 52 is hollow circuit cylinder
The voice coil motor of formula, diaphragm 51 is mounted on the cylinder end face of voice coil motor, and the trepanning of diaphragm 51 is embedded in voice coil motor
Hollow space is incident on to which the light of light transmissive aperture 51 is all appeared from the hollow space of voice coil motor in optical detector 53.
In another optional embodiment of the utility model embodiment, optical detector 53 is single pixel photodetector,
Single pixel photodetector only measures the energy at convergent point, i.e., the light energy that single pixel photodetector measures is
The light energy of convergent point, to be conducive to accurately calculate tested gas concentration.
In another optional embodiment of the utility model embodiment, collimator 2 includes refraction type achromatism collimating mirror
Or total reflection collimating mirror, collimator 2 shown in Fig. 2 use refraction type achromatism collimating mirror.
Embodiment two
A kind of gas concentration analysis method that the utility model embodiment provides, as shown in figure 4, including：
Step S1, collimation step will be irradiated to gas compartment after light that light source is sent out collimation, wherein gas compartment be sealed with by
Gas is surveyed, the light covering that light source is sent out is tested the characteristic absorption spectrum of gas；
Step S2, dispersion step, to gas compartment penetrate light 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 be 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 the utility model embodiment, the light that collimation step sends out light source is narrow with traditional chromatograph as incident light
Light in seam transmitted ambient is compared, and the light that light source is sent out has larger luminous flux, is conducive to the light energy for improving convergent point, from
And promote the signal-to-noise ratio of trace gas detection.Secondly, the light that light source is sent out can to all the winds dissipate, and collimation step sends out light source
It is irradiated to gas compartment after the light collimation gone out；The light that dispersion step penetrates 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；Then,
Measuring process is by receiving the luminous energy of different convergent points on target direction, and according to the luminous energy of convergent point to being tested the concentration of gas
It is analyzed, to the luminous energy for the only convergent point that measuring instrument receives every time, improves and different convergent point luminous energy are examined
The precision of survey, that is, improve spectral resolution.Thus, which alleviates traditional gas concentration analysis dress
In setting, the technical issues of spectral resolution and signal-to-noise ratio mutually restrict, improve to be tested in confining gas room 3 gas concentration into
The accuracy of row analysis.
In one optional embodiment of the utility model embodiment, as shown in figure 5, the gas concentration analysis method is also wrapped
It includes：
Step S4, constitution step construct dispersing instrument by simple lens or lens group, what dispersing instrument was used to penetrate gas compartment
Light is into line convergence and dispersion, so that the spacing of convergent point, which meets, presets distance values.
Specifically, the dispersing instrument of step S4 constructions is in step S2.Step S4 constructs color by simple lens or lens group
Instrument is dissipated, dispersing instrument can make convergent point spread in various degree because of factors such as radius of curvature, the manufacture materials of lens, that is, 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 utility model embodiment, dispersing instrument is constructed by simple lens or lens group, makes convergent point according to actual conditions
Spacing meet preset distance values, be conducive to adjust convergent point spacing, reduce convergent point between illumination influence.
The computer program product of gas concentration analysis method and device that the utility model embodiment is provided, including deposit
The computer readable storage medium of program code is stored up, the instruction that said program code includes can be used for executing previous methods and implement
Method described in example, 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
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, can also be electrical connection；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, it can understand above-mentioned term with concrete condition
Concrete meaning in the present invention.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer read/write memory medium.Based on this understanding, the technical solution of the utility model substantially or
Person says that the part of the part that contributes to existing technology or the technical solution can be expressed in the form of software products,
The computer software product is stored in a storage medium, including some instructions are used so that computer equipment (can be with
Personal computer, server or the network equipment etc.) execute each embodiment the method for the utility model whole or portion
Step by step.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), with
Machine accesses various Jie that can store program code such as memory (RAM, Random Access Memory), magnetic disc or CD
Matter.
It is in the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
The utility model and simplifying describes for ease of description, do not indicate or imply the indicated device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore should not be understood as limiting 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 scope of protection of the utility model is not limited thereto, although with reference to aforementioned
The utility model is described in detail in embodiment, it will be understood by those of ordinary skill in the art 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 the skill recorded in previous embodiment
Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications,
Variation is replaced, 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 scope of protection of the utility model is answered described is wanted with right
Subject to the protection domain asked.
Claims (8)
1. a kind of gas concentration analytical equipment, which is characterized in that including：Light source, collimator, gas compartment, dispersing instrument, measuring instrument,
Wherein,
The gas compartment is sealed with tested gas；
The light source is used to send out the light for the characteristic absorption spectrum for covering the tested gas；
The collimator is used to be irradiated to the gas compartment after collimating the light that the light source is sent out；
Light of the dispersing instrument for being penetrated to 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 be light from the dispersing instrument outgoing after the direction of propagation；
The measuring instrument is used to receive the luminous energy of the different convergent points, and root by the movement on the target direction
The concentration of the tested gas is analyzed according to the luminous energy of the convergent point.
2. the apparatus according to claim 1, which is characterized in that the light source is point light source.
3. the apparatus according to claim 1, which is characterized in that the dispersing instrument is the convergent lens of refraction type, the meeting
Poly- lens make the different convergent points be sequentially distributed in the optical axis direction of the lens by optical wavelength.
4. device according to claim 3, which is characterized in that the measuring instrument includes：Diaphragm, positioner, light are visited
Survey device and signal processor, wherein
The position of opening of the diaphragm is set on the optical axis of the lens, and the positioner exists for controlling the diaphragm
The optical axis direction of the lens moves, so that the diaphragm is moved at the different convergent points；
The optical detector is used to detect the light through the diaphragm, and converts the light detected to electric signal；
The signal processor is connected with the optical detector, the electric signal for receiving the optical detector conversion, and according to
The electric signal calculates the concentration of the tested gas.
5. device according to claim 4, which is characterized in that the trepanning of the diaphragm is opened on light-proof material
Circular hole.
6. device according to claim 4, which is characterized in that the positioner is the voice coil electricity of hollow circuit cylinder formula
Machine, the diaphragm is mounted on the cylinder end face of the voice coil motor, and the trepanning of the diaphragm is embedded in the voice coil motor
Hollow space.
7. device according to claim 4, which is characterized in that the optical detector is single pixel photodetector.
8. the apparatus according to claim 1, which is characterized in that the collimator include refraction type achromatism collimating mirror or
It is totally reflected collimating mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721925944.5U CN207798648U (en) | 2017-12-29 | 2017-12-29 | Gas concentration analytical equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721925944.5U CN207798648U (en) | 2017-12-29 | 2017-12-29 | Gas concentration analytical equipment |
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| CN207798648U true CN207798648U (en) | 2018-08-31 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966409A (en) * | 2017-12-29 | 2018-04-27 | 青岛崂应环境科技有限公司 | Gas concentration analysis method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966409A (en) * | 2017-12-29 | 2018-04-27 | 青岛崂应环境科技有限公司 | Gas concentration analysis method and device |
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