CN102393372A - Optical system of flue gas monitoring instrument and flue gas monitoring instrument - Google Patents

Optical system of flue gas monitoring instrument and flue gas monitoring instrument Download PDF

Info

Publication number
CN102393372A
CN102393372A CN2011103216875A CN201110321687A CN102393372A CN 102393372 A CN102393372 A CN 102393372A CN 2011103216875 A CN2011103216875 A CN 2011103216875A CN 201110321687 A CN201110321687 A CN 201110321687A CN 102393372 A CN102393372 A CN 102393372A
Authority
CN
China
Prior art keywords
light
catoptron
flue gas
optical
gas monitoring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2011103216875A
Other languages
Chinese (zh)
Inventor
崔厚欣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing SDL Technology Co Ltd
Original Assignee
Beijing SDL Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing SDL Technology Co Ltd filed Critical Beijing SDL Technology Co Ltd
Priority to CN2011103216875A priority Critical patent/CN102393372A/en
Publication of CN102393372A publication Critical patent/CN102393372A/en
Pending legal-status Critical Current

Links

Abstract

The invention discloses an optical system of a flue gas monitoring instrument, which includes an ultraviolet light source, a first curved surface reflecting mirror, an incidence slit, a first reflecting mirror, a second reflecting mirror, a first collimating mirror, an optical window, a third reflecting mirror, a fourth reflecting mirror, a second collimating mirror, an optical processing device and a detector. In the optical system disclosed by the invention, rays emitted by the ultraviolet light source focus at the inlet of the incidence slit under the collection and the reflection functions of the first curved surface reflecting mirror, the problem that light energy consumption is generated due to the reflection on the surface of the lens when the rays are penetrating and focusing at the lens is solved, the light energy consumption is reduced further, half of the original light energy is finally utilized through adjusting the position of the first reflecting mirror, which is far higher than the light energy utilization ratio in the background art, the light energy loss is further reduced, the signal to noise ratio of the flue gas monitoring instrument is improved, and the detection error is further reduced. The invention further discloses a flue gas monitoring instrument.

Description

A kind of optical system of flue gas monitoring instrument and flue gas monitoring instrument
Technical field
The invention belongs to the flue gas monitoring technical field, relate in particular to a kind of optical system and flue gas monitoring instrument of flue gas monitoring instrument.
Background technology
Along with improving constantly of human living standard, the mankind more and more pay attention to the development of self, and are also more and more stronger to improving its own existence environment requirement, and environmental protection becomes the major issue that national governments pay much attention to.State Environmental Protection Administration has formulated the relevant policy rules, requires the producer of discharging atmospheric pollution gas must take desulfurization, dust suppression, must implement overall control to the atmospheric pollution gaseous emission, particularly to SO 2, NO, NO 2, NH 3Carry out the on-line continuous monitoring with the concentration of flue dust.Because different gas componants has absorption separately at the different wavelengths place in the flue gas, therefore, utilize the mode of spectrometer beam split can detect the absorption spectrum of gas componant, and then can confirm the concentration of each gas componant according to langbobier law.In flue gas pollutant discharging on-line monitoring field, using is the ultraviolet difference absorption spectroscopy more widely at present.
Flue gas monitoring instrument mainly comprises: sampling probe, data processing display unit, logic control element and optical system.Wherein, The structure of optical system is as shown in Figure 1, comprises ultraviolet source 11, condenser lens 12, entrance slit 13, half-reflecting half mirror 14, catoptron 15, collimating mirror 16, optics window 17, catoptron 18, catoptron 19, grating 110, focus lamp 111 and detecting device 112.
The ultraviolet light that ultraviolet source 11 sends converges to entrance slit 13 through condenser lens 12; The ultraviolet light that penetrates from entrance slit 13 shines on the catoptron 15 through half-reflecting half mirror 14; 15 pairs of incident lights of catoptron carry out the light path turnover makes it arrive collimating mirror 16; After collimating, 16 pairs of incident lights of collimating mirror are injected into the detection probe that is positioned at flue through optics window 17; End in detection probe is provided with optics window 17, the other end is provided with catoptron 18, and the effect of optics window 17 is isolation flue gas environment, prevents that optical system is by dust pollution.The light that penetrates from optics window 17 reflects through the mirror 18 that is reflected behind the flue gas; Thereby the route along identical returns; Catoptrical light intensity has comprised the concentration information of gas to be measured, and the reflected light that is penetrated by catoptron 18 arrives collimating mirror 16 through optics window 17, and collimating mirror 16 reflexes to catoptron 15 with incident light; Then light shines on the half-reflecting half mirror 14 through the effect of catoptron 15; But this moment, light can and can not see through by half-reflecting half mirror 14 reflection, thereby light is reflexed on the catoptron 19 by half-reflecting half mirror 14, the light transmission that penetrates from catoptron 19 to the grating 110 by beam split; Light after grating 110 beam split is by after converging mirror 111 focusing; Shine on the detecting device 112 by certain wavelength series arrangement,, calculate the concentration of each composition in the flue gas at last according to this absorption spectrum by the light intensity (being absorption spectrum) of detecting device 112 each wavelength of record.
But because lens surface can have reflex to light, and lens material itself has absorption to light, can lose luminous energy in the process that therefore the 12 pairs of ultraviolet lights of condenser lens in the above-mentioned optical system converge; In addition, behind the employing half-reflecting half mirror, the final luminous energy that utilizes has only 1/4 of original luminous energy at most, can cause bigger optical energy loss, and the optical energy loss of optical system can reduce the signal to noise ratio (S/N ratio) of flue gas monitoring instrument, and then increases the detection error.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of optical system of flue gas monitoring instrument, can reduce optical energy loss, thereby improve the signal to noise ratio (S/N ratio) of flue gas monitoring instrument, reduce to detect error.Simultaneously, the present invention also provides a kind of flue gas monitoring instrument, through its optical system is carried out architecture advances, reduces the optical energy loss that optical system produces, thereby improves the signal to noise ratio (S/N ratio) of flue gas monitoring instrument, and then reduce to detect error.
For realizing above-mentioned purpose, the present invention provides following technical scheme:
A kind of optical system of flue gas monitoring instrument comprises ultraviolet source, first surface catoptron, entrance slit, first catoptron, second catoptron, first collimating mirror, optics window, the 3rd catoptron, the 4th catoptron, second collimating mirror, light processor and detecting device;
Said first surface catoptron is used for the light of said ultraviolet source emission is reflected, and said light is converged to the porch of said entrance slit; Said second catoptron is used to receive the part light that penetrates from said entrance slit and it is reflexed to said first collimating mirror, receives the light that said first collimating mirror penetrates simultaneously and reflexes to said first catoptron; Said first catoptron is used for stop portions from the light that entrance slit penetrates, and receives the light of said second mirror reflects simultaneously and it is reflexed to said the 4th catoptron; Said first collimating mirror is used to receive the light of said second mirror reflects, and its back that collimates is penetrated to said the 3rd catoptron, receives the light of said the 3rd mirror reflects simultaneously and it is reflexed to said second catoptron; The light that said first collimating mirror penetrates sees through said optics window and exposes to said the 3rd catoptron, and said the 3rd catoptron receives the light of said first collimating mirror ejaculation and it is reflexed to said first collimating mirror; Said the 4th catoptron is used to receive the light of said first mirror reflects and it is reflexed to second collimating mirror; Said second collimating mirror is used to receive the light of said the 4th mirror reflects, and its back that collimates is penetrated to said light processor; Said light processor is used to receive the light that said second collimating mirror penetrates, and the light that receives is carried out beam split and focuses on said detecting device; Said detecting device receives the light through said light processor beam split and focusing, writes down the light intensity of said light in each wavelength, confirms the concentration of each composition in the flue gas afterwards according to the light intensity of said each wavelength.
Preferably, in the optical system of above-mentioned flue gas monitoring instrument, said the 3rd catoptron is a prism of corner cube.
Preferably, in the optical system of above-mentioned flue gas monitoring instrument, said light processor comprises spheric grating; Said spheric grating is used to receive the light that said second collimating mirror penetrates, and the light that receives is carried out beam split and focuses on said detecting device.
Preferably, in the optical system of above-mentioned flue gas monitoring instrument, said light processor comprises that also being connected, can driving said spheric grating with said spheric grating is the drive unit of axle rotation with its center line.
Preferably, in the optical system of above-mentioned flue gas monitoring instrument, said drive unit comprises motor, worm and worm wheel; The rotating shaft of said motor is connected with said worm screw is coaxial; Said worm screw and the engagement of said worm gear; Said worm gear is connected with said spheric grating.
Preferably, in the optical system of above-mentioned flue gas monitoring instrument, said light processor comprises the plane grating and second curved reflector; Said plane grating is used to receive the light that said second collimating mirror penetrates, and the light that receives is carried out beam split, and the light that will pass through beam split penetrates to said second curved reflector; Said second curved reflector is used to receive the light of said plane grating ejaculation and it is focused on said detecting device.
Preferably, in the optical system of above-mentioned flue gas monitoring instrument, said light processor comprises that also being connected, can driving said plane grating with said plane grating serves as the drive unit of axle rotation with the center line perpendicular to its plane, place.
Preferably, in the optical system of above-mentioned flue gas monitoring instrument, said drive unit comprises motor, worm and worm wheel; The rotating shaft of said motor is connected with said worm screw is coaxial; Said worm screw and the engagement of said worm gear; Said worm gear is connected with said plane grating.
Preferably, in the optical system of above-mentioned flue gas monitoring instrument, said first catoptron can stop half light that penetrates from said entrance slit.
The invention also discloses a kind of flue gas monitoring instrument, comprise sampling probe, data processing display unit, logic control element and aforesaid any one optical system.
This shows; Beneficial effect of the present invention is: in the optical system of flue gas monitoring instrument disclosed by the invention, the light that ultraviolet source is launched focuses on through converging with the porch of reflex at entrance slit of first surface catoptron, realizes focusing on through condenser lens with light in the background technology and compares; Do not exist light in penetrating the condenser lens process, to produce the problem of luminous energy loss because of reflection taking place at lens surface; Thereby reduced optical energy loss, and, can be through the position of adjusting first catoptron so that final utilization of 1/2 quilt of primary light ability; Be higher than the efficiency of light energy utilization in the background technology far away; Further reduce the loss of luminous energy, thereby improve the signal to noise ratio (S/N ratio) of flue gas monitoring instrument, and then reduce to detect error.In addition, flue gas monitoring instrument disclosed by the invention improves the structure of optical system, has reduced the optical energy loss of optical system, thereby has improved the signal to noise ratio (S/N ratio) of flue gas monitoring instrument, and then has reduced the detection error.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the optical system of existing flue gas monitoring instrument;
Fig. 2 is the structural representation of the optical system of a kind of flue gas monitoring instrument disclosed by the invention;
Fig. 3 is the structural representation of the optical system of another kind of flue gas monitoring instrument disclosed by the invention;
Fig. 4 is the structural representation of a kind of drive unit disclosed by the invention.
Embodiment
CCD:Charge-coupled Device, charge coupled cell.
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The invention discloses a kind of optical system of flue gas monitoring instrument, can reduce optical energy loss, and then improve the signal to noise ratio (S/N ratio) of flue gas monitoring instrument, reduce to detect error.
Referring to Fig. 2, Fig. 2 is the structural representation of the optical system of flue gas monitoring instrument disclosed by the invention.
This optical system comprises ultraviolet source 21, first surface catoptron 22, entrance slit 23, first catoptron 24, second catoptron 25, first collimating mirror 26, optics window 27, the 3rd catoptron 28, the 4th catoptron 29, second collimating mirror 210, light processor 211 and detecting device 212.
Wherein, ultraviolet source 21 is used for emitted in ultraviolet light as test light.
First surface catoptron 22 is used for light to ultraviolet source 21 emission and converges and reflect.Entrance slit 23 is positioned on the light path of light of first surface catoptron 22 reflection, and the light of ultraviolet source 21 emissions converges to the porch of entrance slit 23 via first surface catoptron 22, improves light intensity with this.
Second catoptron 25 is positioned on the light path of the light of entrance slit 23 ejaculations, is used to receive the part light of entrance slit 23 ejaculations and it is reflexed to first collimating mirror 26, receives the light of first collimating mirror, 26 ejaculations simultaneously and reflexes to first catoptron 24.
First catoptron 24 is used for stop portions from the light that entrance slit 23 penetrates between the entrance slit 23 and second catoptron 25, receive the light of second catoptron, 25 reflections simultaneously and it is reflexed to the 4th catoptron 29.The installation site of first catoptron 24 has determined the utilization factor of luminous energy; Position through adjusting first catoptron 24 can reach 1/2 of original luminous energy with the luminous energy that finally utilizes; Concrete; When 1/2 the light that penetrates from entrance slit 23 when 24 pairs of first catoptrons stops, can the luminous energy that finally utilizes be brought up to 1/2 of original luminous energy.
First collimating mirror 26 is positioned on the light path of light of second catoptron 25 reflection; Be used to receive the light of second catoptron, 25 reflections; Its back that collimates is penetrated to the 3rd catoptron 28, received the light of the 3rd catoptron 28 reflections simultaneously and it is reflexed to second catoptron 25.
Optics window 27 is arranged at an end of the probe (not shown) of flue gas monitoring instrument; The 3rd catoptron 28 is arranged at the other end of probe; The light that first collimating mirror 26 penetrates sees through that optics window 27 exposes to that the 3rd catoptron 28, the three catoptrons 28 receive light that first collimating mirror 26 penetrates and with its reflected back first collimating mirror 26.
The 4th catoptron 29 is positioned on the light path of light of first catoptron 24 reflection, is used to receive the light of first catoptron, 24 reflections and it is reflexed to second collimating mirror 210.
Second collimating mirror 210 is positioned on the light path of light of the 4th catoptron 29 reflection, is used to receive the light of the 4th catoptron 29 reflections, and its back that collimates is penetrated to light processor 211.
Light processor 211 is used to receive the light that second collimating mirror 210 penetrates, and afterwards the light that receives is carried out beam split and focuses on detecting device 212.
The light that detecting device 212 receives through light processor 211 beam split and focusing, record light are confirmed the concentration of each composition in the flue gas afterwards in the light intensity of each wavelength according to the light intensity of each wavelength.
Light processor 211 can adopt multiple structure, and the present invention describes two kinds of structures wherein.
A kind of structure of light processor 211 comprises the plane grating 2111 and second curved reflector 2112 as shown in Figure 2.Wherein, plane grating 2111 is positioned on second collimating mirror, the 210 irradiant light paths, is used to receive the light that second collimating mirror 210 penetrates, and afterwards the light that receives is carried out beam split, and the light that will pass through beam split penetrates to second curved reflector 2112; Second curved reflector 2112 is positioned on the light path of the light that plane grating 2111 penetrates, and is used to receive light that plane grating 2111 penetrates and it is focused on detecting device 212.
In addition; Light processor 211 can also only be made up of spheric grating; This spheric grating is positioned on second collimating mirror, the 210 irradiant light paths; The irradiate light that penetrates when second collimating mirror 210 is to spheric grating, and spheric grating focuses in beam split, through the light of spheric grating beam split and focusing to detecting device 212 ejaculations.When light processor 211 adopts spheric grating, need not to be provided with curved reflector, simplified the structure of optical system.
Transmission course in the face of light in the optical system shown in Figure 2 describes down.
First surface catoptron 22 in the optical system, entrance slit 23, second catoptron 25, first collimating mirror 26, light window 27 and the 3rd catoptron 28 have formed the transmission path of light, and the 3rd catoptron 28, light window 27, first collimating mirror 26, second catoptron 25, first catoptron 24, the 4th catoptron 29, second collimating mirror 210, light processor 211 and detecting device 212 have formed the reception path of light.
The ultraviolet light of ultraviolet source 21 emissions converges and reflex through first surface catoptron 22, focuses in the porch of entrance slit 23, improves the light intensity of test light to greatest extent; Light passes entrance slit 23 to 25 ejaculations of second catoptron afterwards; Because first catoptron 24 is arranged between the entrance slit 23 and second catoptron 25; So first catoptron, 24 meeting stop portions light; The first half of part irradiate light to the second catoptron 25 that penetrates by entrance slit 23, second catoptron 25 reflexes to the light that receives the first half of first collimating mirror 26; 26 pairs of light that receive from second catoptron 25 of first collimating mirror collimate, and divergent beams are transformed to parallel beam, and it is penetrated to the 3rd catoptron 28; Optics window 27 is a kind of optical elements; Light is passed through to greatest extent; And the testing environment that will be positioned at its both sides is separated; Optics window 27 is isolated parts except that the 3rd catoptron 28 and flue gas environment in the optical system in the present invention, prevents that dust from polluting it, and the flue gas that the light that penetrates from first collimating mirror 26 sees through optics window 27 and the probe exposes to the 3rd catoptron 28.
28 pairs of light that receive of the 3rd catoptron reflect; Reflection ray sees through the Lower Half that flue gas and optics window 27 in the probe expose to first collimating mirror 26; Comprised the concentration information of gas to be measured in the light that this moment, first collimating mirror 26 received, first collimating mirror 26 reflexes to the light that receives the Lower Half of second catoptron 25; Second catoptron 25 will reflex to first catoptron 24 from the light that first collimating mirror 26 receives; First catoptron 24 will reflex to the 4th catoptron 29 from the light that second catoptron 25 receives afterwards, then will reflex to second collimating mirror 210 from the light that first catoptron 24 receives by the 4th catoptron 29; Second collimating mirror 210 receives the light of the 4th catoptron 29 reflections, and this light is collimated, and it is transformed to parallel beam and reflexes to plane grating 2111; The parallel beam that 2111 pairs second collimating mirrors of plane grating 210 penetrate carries out beam split; Light through beam split shines detecting device 212 according to certain wavelength series arrangement under the effect of second curved reflector 2112; Light intensity by detecting device 212 each wavelength of record; Form absorption spectrum, and calculate the concentration of each composition in the flue gas according to absorption spectrum.
In the optical system of flue gas monitoring instrument disclosed by the invention; The light that ultraviolet source 21 is launched focuses on through converging with the porch of reflex at entrance slit 23 of first surface catoptron 22; Compare through condenser lens realization focusing with light in the background technology, avoided light in penetrating the condenser lens process, to produce the problem of loss, reduced optical energy loss because of reflection taking place at lens surface; And position through adjustment first catoptron 24; Can further reduce the loss of luminous energy so that final utilization of 1/2 quilt of primary light ability is higher than the efficiency of light energy utilization in the background technology far away; Thereby improved the signal to noise ratio (S/N ratio) of flue gas monitoring instrument, and then reduced the detection error.
In the optical system of flue gas monitoring instrument shown in Figure 2,, should guarantee that the exit direction of reflection ray of the 3rd catoptron 28 is consistent with incident direction for the optical energy loss in the process of irradiate light to the first collimating mirror 26 that reduces the reflection of the 3rd catoptron 28.
In the enforcement, the 3rd catoptron 28 can adopt common catoptron.But when 28 run-off the straights of the 3rd catoptron, the light that can cause being reflexed to first collimating mirror 26 by the 3rd catoptron 28 departs from incident direction, thereby causes the loss of luminous energy.Therefore, when the 3rd catoptron 28 adopts common catoptron, its installation accuracy had higher requirement.
In order to reduce the installation difficulty of the 3rd catoptron 28, the 3rd catoptron 28 can be selected prism of corner cube (as shown in Figure 2) for use.Prism of corner cube is a kind of glass elements of using do retroeflection, intercepts cubical one jiao by a plane and forms, and cutting planes becomes isogonisms in three crossing planes of angle therewith.Prism of corner cube is injected irradiating light beam with three 90 ° of angular convolutions, has the function that makes light reverse, can all incident raies be reflected back according to original direction.In addition, prism of corner cube is higher to the tolerance of alignment error, when there is certain alignment error in prism of corner cube, still can incident ray be reflected back according to its its original orientation.Therefore, when the 3rd catoptron 28 is selected prism of corner cube for use, can reduce installation difficulty.
Utilizing the ultraviolet difference absorption spectroscopy to detect each the composition (SO in the flue gas 2, NO, NO 2, NH 3) concentration the time, usually selecting does not have the wavelength points place of phase mutual interference to calculate, like SO 2Be chosen in the 290nm-310nm wave band, oxides of nitrogen is selected in the 410-440nm wave band, does not have the absorption of other compositions to disturb basically at this wave band, can accurately detect.
The pairing spectral response range of a frame spectrum and the spectral resolution of detecting device is mutual restriction in the flue gas monitoring instrument.Usually when the resolution of spectral detection is higher, can obtain absorption information preferably, but then corresponding the narrowing down of responding range of a frame spectrum to be expected the spectral response range of broad, then need sacrifice certain spectral resolution.For example: to NH 3Concentration detect and to carry out at the 200nm-230nm wave band, detect to the concentration of NO2 and carry out at the 410nm-440nm wave band, if select high resolving power, then a frame spectrum can't respond this two wave bands simultaneously.The present invention discloses the optical system of another kind of flue gas monitoring instrument, improves through the structure to optical system, takes into account the spectral resolution and the spectral response range of flue gas monitoring instrument, can when high spectral resolution is provided, increase spectral response range.
Referring to Fig. 3, Fig. 3 is the structural representation of the optical system of another kind of flue gas monitoring instrument disclosed by the invention.Only just describe with the difference part of the optical system of flue gas monitoring instrument shown in Figure 2.
Light processor 211 comprises plane grating 2111, second curved reflector 2112 and drive unit 2113.Wherein, drive unit 2113 is connected with plane grating 2111, and can drive plane grating 2111 serves as the axle rotation with the center line perpendicular to this plane, plane grating 2111 place.
Behind the spectral information that has write down present frame; Drive the rotation that plane grating 2111 is done certain angle through drive unit 2113; Obtain the spectral information of next frame; Just can obtain the spectral information of relative broad range with two frames or after more the spectral information of multiframe is connected, spectral resolution has no loss simultaneously.
Drive unit 2113 implementations of driving plane grating 2111 have multiple, do not do one by one at this and introduce.There is a kind of in the implementation in following mask body place of matchmakers.
Referring to Fig. 4, Fig. 4 is the structural representation of a kind of drive unit disclosed by the invention.This drive unit comprises motor 101, worm screw 102 and worm gear 103.
Wherein, the rotating shaft of motor 101 and 102 coaxial connections of worm screw in the enforcement, can connect as one through rotating shaft and the worm screw 102 of compliant member with motor 101, worm screw 102 and worm gear 103 engagements, and worm gear 103 is connected with plane grating 2111 simultaneously.When motor 101 rotations, can drive worm screw 102 coaxial rotations, worm gear 103 rotates under the drive of worm screw 102 afterwards, and the plane grating 2111 that is connected with worm gear 103 rotates thereupon.Through the anglec of rotation of control motor 101, the anglec of rotation that can control plane grating 2111.Direction shown in the arrow is the sense of rotation of plane grating 2111 among Fig. 4.
In the enforcement, motor 101 can adopt stepper motor, and the rotation of stepper motor moves with fixing angle step by step, can come the pilot angle displacement through the gating pulse number, reaches accurate location, can drive the rotation of plane grating 2111 more accurately.
Certainly, when light processor 211 only is made up of spheric grating, also can further in light processor 211, drive unit be set, it serves as the axle rotation with spheric grating with its center line that this drive unit is connected, can drives this spheric grating.
Behind the spectral information that has write down present frame; Do the rotation of certain angle through drive unit drive ball concave grating; Obtain the spectral information of next frame, just can obtain the spectral information of relative broad range with two frames or after more the spectral information of multiframe is connected, spectral resolution has no loss simultaneously; Thereby taken into account the spectral resolution and the spectral response range of flue gas monitoring instrument, when high spectral resolution is provided, increased spectral response range.
This drive unit can adopt multiple structure to realize; Only introduce wherein a kind of at this: this drive unit comprises motor, worm gear and worm screw, and wherein the rotating shaft of motor is connected with worm screw is coaxial, the worm and worm wheel engagement; Worm gear is connected with spheric grating simultaneously; The structure basically identical of its structure and drive unit shown in Figure 3, difference only is that the worm screw in the drive unit shown in Figure 3 is connected with plane grating, and the worm screw in the drive unit here is connected with spheric grating.
In the optical system of above-mentioned disclosed each flue gas monitoring instrument of the present invention, first surface catoptron 22 can adopt spherical reflector or parabolic mirror, and second camber reflection 2112 can adopt spherical reflector or parabolic mirror, and detecting device adopts the CCD detecting device.
The invention also discloses a kind of flue gas monitoring instrument; Comprise sampling probe, data processing display unit, logic control element and optical system; Wherein optical system is aforementioned disclosed any optical system of the present invention, and its structure is described referring to preamble, repeats no more at this.Flue gas monitoring instrument disclosed by the invention improves through the structure to its optical system, can reduce the luminous energy loss of optical system, thereby improves the signal to noise ratio (S/N ratio) of flue gas monitoring instrument, and then reduces to detect error.
Each embodiment adopts the mode of going forward one by one to describe in this instructions, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims (10)

1. the optical system of a flue gas monitoring instrument; It is characterized in that, comprise ultraviolet source, first surface catoptron, entrance slit, first catoptron, second catoptron, first collimating mirror, optics window, the 3rd catoptron, the 4th catoptron, second collimating mirror, light processor and detecting device;
Said first surface catoptron is used for the light of said ultraviolet source emission is reflected, and said light is converged to the porch of said entrance slit; Said second catoptron is used to receive the part light that penetrates from said entrance slit and it is reflexed to said first collimating mirror, receives the light that said first collimating mirror penetrates simultaneously and reflexes to said first catoptron; Said first catoptron is used for stop portions from the light that entrance slit penetrates, and receives the light of said second mirror reflects simultaneously and it is reflexed to said the 4th catoptron; Said first collimating mirror is used to receive the light of said second mirror reflects, and its back that collimates is penetrated to said the 3rd catoptron, receives the light of said the 3rd mirror reflects simultaneously and it is reflexed to said second catoptron; The light that said first collimating mirror penetrates sees through said optics window and exposes to said the 3rd catoptron, and said the 3rd catoptron receives the light of said first collimating mirror ejaculation and it is reflexed to said first collimating mirror; Said the 4th catoptron is used to receive the light of said first mirror reflects and it is reflexed to second collimating mirror; Said second collimating mirror is used to receive the light of said the 4th mirror reflects, and its back that collimates is penetrated to said light processor; Said light processor is used to receive the light that said second collimating mirror penetrates, and the light that receives is carried out beam split and focuses on said detecting device; Said detecting device receives the light through said light processor beam split and focusing, writes down the light intensity of said light in each wavelength, confirms the concentration of each composition in the flue gas afterwards according to the light intensity of said each wavelength.
2. the optical system of flue gas monitoring instrument according to claim 1 is characterized in that, said the 3rd catoptron is a prism of corner cube.
3. the optical system of flue gas monitoring instrument according to claim 1 and 2 is characterized in that, said light processor comprises spheric grating;
Said spheric grating is used to receive the light that said second collimating mirror penetrates, and the light that receives is carried out beam split and focuses on said detecting device.
4. the optical system of flue gas monitoring instrument according to claim 3 is characterized in that, said light processor comprises that also being connected, can driving said spheric grating with said spheric grating is the drive unit of axle rotation with its center line.
5. the optical system of flue gas monitoring instrument according to claim 4 is characterized in that, said drive unit comprises motor, worm and worm wheel;
The rotating shaft of said motor is connected with said worm screw is coaxial;
Said worm screw and the engagement of said worm gear;
Said worm gear is connected with said spheric grating.
6. according to the optical system of said claim 1 or 2 described flue gas monitoring instruments, it is characterized in that said light processor comprises the plane grating and second curved reflector;
Said plane grating is used to receive the light that said second collimating mirror penetrates, and the light that receives is carried out beam split, and the light that will pass through beam split penetrates to said second curved reflector;
Said second curved reflector is used to receive the light of said plane grating ejaculation and it is focused on said detecting device.
7. the optical system of flue gas monitoring instrument according to claim 6 is characterized in that, said light processor comprises that also being connected, can driving said plane grating with said plane grating serves as the drive unit of axle rotation with the center line perpendicular to its plane, place.
8. the optical system of flue gas monitoring instrument according to claim 7 is characterized in that, said drive unit comprises motor, worm and worm wheel;
The rotating shaft of said motor is connected with said worm screw is coaxial;
Said worm screw and the engagement of said worm gear;
Said worm gear is connected with said plane grating.
9. the optical system of flue gas monitoring instrument according to claim 1 is characterized in that, said first catoptron can stop half light that penetrates from said entrance slit.
10. a flue gas monitoring instrument comprises sampling probe, data processing display unit, logic control element and optical system, it is characterized in that, said optical system is each described optical system in the claim 1 to 9.
CN2011103216875A 2011-10-20 2011-10-20 Optical system of flue gas monitoring instrument and flue gas monitoring instrument Pending CN102393372A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011103216875A CN102393372A (en) 2011-10-20 2011-10-20 Optical system of flue gas monitoring instrument and flue gas monitoring instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011103216875A CN102393372A (en) 2011-10-20 2011-10-20 Optical system of flue gas monitoring instrument and flue gas monitoring instrument

Publications (1)

Publication Number Publication Date
CN102393372A true CN102393372A (en) 2012-03-28

Family

ID=45860732

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011103216875A Pending CN102393372A (en) 2011-10-20 2011-10-20 Optical system of flue gas monitoring instrument and flue gas monitoring instrument

Country Status (1)

Country Link
CN (1) CN102393372A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103344591A (en) * 2013-06-28 2013-10-09 聚光科技(杭州)股份有限公司 Flue gas denitrification monitoring system and method
EP3715830A1 (en) * 2019-03-26 2020-09-30 Eaton Intelligent Power Limited System for detection of particles in fluids

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0254282B1 (en) * 1986-07-21 1992-10-07 Erwin Sick GmbH Optik-Elektronik Spectroanalytical gas measuring apparatus
CN201561932U (en) * 2009-11-17 2010-08-25 黑龙江省科学院自动化研究所 Flue gas detecting system based on ultraviolet band light analysis
JP2010261793A (en) * 2009-05-01 2010-11-18 Kurabo Ind Ltd Method and apparatus for measuring dissolved substance content in liquid, and etching-solution reproducing system
CN102141485A (en) * 2011-01-18 2011-08-03 北京雪迪龙科技股份有限公司 Smoke online detection system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0254282B1 (en) * 1986-07-21 1992-10-07 Erwin Sick GmbH Optik-Elektronik Spectroanalytical gas measuring apparatus
JP2010261793A (en) * 2009-05-01 2010-11-18 Kurabo Ind Ltd Method and apparatus for measuring dissolved substance content in liquid, and etching-solution reproducing system
CN201561932U (en) * 2009-11-17 2010-08-25 黑龙江省科学院自动化研究所 Flue gas detecting system based on ultraviolet band light analysis
CN102141485A (en) * 2011-01-18 2011-08-03 北京雪迪龙科技股份有限公司 Smoke online detection system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
崔厚欣: "吸收光谱法在实际应用中的关键问题的研究", 《中国博士论文全文数据库》 *
巩岩等: "一种准确聚焦掠入射球面光栅单色仪的光学设计", 《光学学报》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103344591A (en) * 2013-06-28 2013-10-09 聚光科技(杭州)股份有限公司 Flue gas denitrification monitoring system and method
CN103344591B (en) * 2013-06-28 2015-11-25 聚光科技(杭州)股份有限公司 Denitrating flue gas monitoring system and method
EP3715830A1 (en) * 2019-03-26 2020-09-30 Eaton Intelligent Power Limited System for detection of particles in fluids

Similar Documents

Publication Publication Date Title
JP5705261B2 (en) Wide spectrometer
ES2699694T3 (en) Optical position measuring device
CN106291580A (en) Laser infrared radar imaging system
CN107144543B (en) Receiving and transmitting integrated open light path atmosphere detection system
CN104155241A (en) Long-path optical absorption cell adjustable in optical path
CN100359299C (en) Grating diffraction efficiency testing instrument for optical path symmetrical distribution
RU2017144290A (en) SMOKE DETECTOR
CN102004311A (en) Tera-hertz wave scanning method and system
CN106556568A (en) Using the infrared spectrometer and scanner of attenuated total reflectance
CN102495010B (en) High sensitivity optical system of DOAS analyzer
CN102393372A (en) Optical system of flue gas monitoring instrument and flue gas monitoring instrument
CN203745364U (en) Optical system with high energy utilization rate for flue gas concentration analyzer
JP2009128073A (en) Optical unit
CN102597817B (en) Meso-optic device
CN105300518A (en) Grazing incidence multi-containing angle plane grating monochromator and method for achieving wavelength scanning
CN103712691A (en) Fourier transformation spectrograph
EP2526452B1 (en) Omnidirectional lens, optical devices utilizing the lens and method for optical measurement
CN105372820A (en) Multi-wavelength coupling same-light-path device
CN202693470U (en) Total-reflection type optical system for smoke concentration analyzer
CN203672491U (en) Fourier transform spectrometer
WO2019007175A1 (en) Efficient optical path folding device
US5420723A (en) Arrangement for transmission and reception of electro-magnetic radiation
CN211877753U (en) Spectrum system for detecting trace gas concentration
US10488652B2 (en) Prism-based scanner
CN102778440A (en) Total-reflection type optical system of flue gas concentration analyzer

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20120328

C12 Rejection of a patent application after its publication