CN103712932B - A kind of multi-channel optical absorption detection device - Google Patents
A kind of multi-channel optical absorption detection device Download PDFInfo
- Publication number
- CN103712932B CN103712932B CN201310755884.7A CN201310755884A CN103712932B CN 103712932 B CN103712932 B CN 103712932B CN 201310755884 A CN201310755884 A CN 201310755884A CN 103712932 B CN103712932 B CN 103712932B
- Authority
- CN
- China
- Prior art keywords
- hole
- optical absorption
- mirror
- detection
- gas
- 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.)
- Expired - Fee Related
Links
Abstract
The present invention is a kind of multi-channel optical absorption detection device for gas detecting, and including the two sides concave mirror being arranged on housing, two sides concave mirror is the most staggered relatively, and the optical axis of two concave mirrors overlaps, and radius of curvature is equal.Wherein arranging multipair through hole on a concave mirror, multipair through hole is along mirror surface circumferentially.The hole of every pair of through hole is to the line of centres center by mirror mirror, one through hole of through hole centering is for detecting the entrance aperture of light beam, another through hole is for detecting the perforation hole of light beam, every a pair entrance aperture, perforation hole and two-face mirror composition one sense channel, the light beam of each sense channel turn back shape envelope cross section for ellipse.Present configuration is simple, and a detection device can synchronize to carry out detection of gas with multiple constituents, low cost, and detection of gas with multiple constituents efficiency is high, is applied to the technical fields such as gas-monitoring, detection and gas absorption spectroanalysis.
Description
Technical field:
The invention belongs to optics and spectroscopy technology field, relate generally to the optics for gas detecting and inhale
Receiving apparatus, specifically a kind of multi-channel optical absorption detection device.It is applied to multicomponent gas monitoring, detection
With technical fields such as gas absorption spectroanalysises.
Background technology:
In the gas composition monitoring used in petrochemical industry process control and atmospheric environment pollution monitoring
Many use gaseous spectrum absorption process.Industry flammable explosive gas and Pollution Gas monitoring are all existed
The requirement that detection sensitivity is high.Long-range optical absorption means is used to improve detection during actual monitoring sensitive
Degree.Gas-monitoring relates to the synchronous detecting of multicomponent gas.At present, it is achieved to Multicomponent synchronic gas
Monitoring needs to use multiple optical absorption means, each absorption plant to be only capable of single component gases and examines
Survey, the comprehensive testing result obtaining multicomponent gas；Or use single channel absorption plant to combine optical fiber light to divide
Multiplex technique realizes the detection to multicomponent gas, and wherein single channel absorption plant combines optical fiber division multiplexing optical skill
Art carries out the monitoring of Multicomponent synchronic gas and also relates to the circuit signal Synchronization Design of complexity, causes system to set
Meter is complicated and detection involves great expense, and runs to detection and operation brings many inconveniences, it is often more important that detection
Link causes the precision of detection and stability to reduce more, makes the popularization and application of spectral absorption detection technique be limited
System.
Science and technology report document and patent about multi-channel gas absorption cell are that comparison is rare.Patent literary composition
Offer (US8299433) and propose a kind of Multi-channel optical absorption cell.This absorption cell utilizes a field lens and multiaspect symmetrical
The object lens of arrangement realize multichannel optical texture, and the program realizes the dual pathways needs four sides object lens, it is achieved three
Passage needs hexahedro object lens, uses the program to there is structure complicated in reality, bulky, cost intensive
With installation and debugging difficulty etc. technical barrier.
Present invention applicant on the internet with regard to this theme, patent documentation and publishing at home and abroad
Journal article retrieve, not yet find closely related with the present invention and as report or document.
Summary of the invention:
The present invention seeks to for multicomponent gas monitoring prior art present in optical absorption means knot
Structure is complicated, the problem that efficiency low cost is high, it is provided that the multichannel of a kind of optical absorption means only two-face mirror
Structure, unitary device can synchronize to carry out detection of gas with multiple constituents, and detection efficiency is high, and gas detecting system becomes
This low multi-channel optical absorption detection device.
Below the technical solution used in the present invention is briefly described:
For urgent need to multicomponent gas synchronous monitoring in current environment monitoring and industry monitoring, and
Prior art cannot meet the efficient detection demand of single pond multiplexing, by innovation and research and development, proposes one
Planting and be prone to the device that through engineering approaches realizes, a table apparatus can be to the Multi-channel optical of multicomponent gas synchronous detecting
Absorption detecting device.
The present invention is a kind of multi-channel optical absorption detection device, includes housing and is mounted thereon
Reflecting mirror, optical absorption detection device is provided with entrance aperture and perforation hole, the two sides concave reflection in the present invention
Mirror is the most staggered relatively, and the reflector curvature radius of two sides concave mirror is equal, recessed in one side in the present invention
Face reflecting mirror is provided with multipair through hole, is not provided with hole in another concave mirror.In every a pair through hole, wherein
A through hole for detection light beam entrance aperture, this to another through hole in through hole for detection beam exit hole.Inspection
Light-metering bundle is repeatedly turned back between two sides concave mirror staggered relatively by every a pair through hole and is constituted a light
Learning absorbing path, each channel application is in the detection of a kind of specific gas composition, and multiple detection light beams are two
Repeatedly turn back in concave mirror and Multi-channel optical absorption detecting is integrally formed.The multipair through hole of the present invention is along it
In a mirror surface circumferentially disposed, the midpoint of every a pair through hole line of centres all with the center of concave mirror
Overlap.Every a pair through hole constitutes a kind of GAS ABSORPTION passage, and GAS ABSORPTION passage is alternatively referred to as optical absorption and leads to
Road, each channel application is in the detection of a kind of specific gas composition, the multi-channel gas optics inspection of the present invention
Survey device achieves a kind of device and multiple gases is carried out optical absorption synchronous detecting simultaneously.
The present invention uses two sides concave mirror the most staggered relatively, only offers logical on a reflecting mirror
Hole pair, has very simple structure, and can realize a fairly large number of multichannel, and be prone to through engineering approaches realization
And application.
The realization of the present invention also resides in: the detection light beam of each optical absorption passage two sides concave mirror it
Between repeatedly turn back formed turn back ray envelop cross section for ellipse.Turning back in the absorption plant of the present invention
Beam cross section face type is oval, and the incidence of detection light beam and shooting angle are to two-face mirror distance change not
Sensitivity, facilitates installation and debugging.
The realization of the present invention also resides in: the reflector type of each reflecting mirror or sphere, or parabola
Or ellipsoid.The reflecting surface face type of reflecting mirror is not done unitary request by the present invention, it is simple to conveniently work
Journeyization realizes.
The realization of the present invention also resides in: along mirror surface multipair through hole circumferentially, multipair through hole hole
To circumferentially.This technical characteristic of the present invention can effectively utilize minute surface area, existing single channel
The detection light beam of optical absorption detection turns back the enveloping surface formed for circular, if therefore to single channel optical absorption
When device carries out Multi-channel extension, detection through hole can not be arranged on circumferencial direction, either symmetry or non-
Symmetry extension all can only carry out Multi-channel extension along single diametric(al), and other diametric(al)s cannot extend logical
Road, otherwise can cause a certain detection light beam to overflow along the through hole of another sense channel, cause the system of detection by mistake
Difference, thus the extension of limiting channel, quantity and the space of passage extension are all very limited amount of, and design meter
Calculate complexity, under this technical scheme, need relatively large tunnel holes aperture, also limit the effective of passage
Expanding space, the passage of the present invention is circumferentially disposed along equal diameter, effective and feasible, when being especially symmetrical arranged,
The simple computation only needing a passage designs, when increasing sense channel number, it is only necessary to according to the passage position designed
Putting parameter circumferentially to process along equal diameter, get final product incidence and the outgoing condition of coincidence detection light beam, light path is adjusted
Whole the most simple, it is easy to accomplish multicomponent gas detects, improve the efficiency that gas detecting is analyzed.
The realization of the present invention also resides in: the hole of each through hole pair of multichannel through hole centering is permissible to centre distance
Equal also can be unequal, i.e. form the multilamellar equal diameter circumferentially through hole pair along minute surface center.The present invention couple
The unequal setting to centre distance of the multichannel through hole hole, is beneficial to utilize the effective area of minute surface, carries further
High pass number of channels and detection efficiency.
The through hole that each passage of the present invention is arranged by two radial symmetric respectively realizes detection light beam input
And output, and the technical scheme of multichannel through hole pair is set on the minute surface of a reflecting mirror.And existing skill
Art uses single through hole realize detection light beam input and output, cause input and the detection light of peripheral detection light beam
Learn device installing space crowded, or the light beam coupling using complicated mechanical-optical setup to realize single through hole inputs defeated
Go out, not only cause whole detecting system bulky and complicated, and make multichannel Project Realization be limited
System.The radial symmetric of input and output through hole of the present invention is arranged, makes input detection beam optical transmission apparatus and defeated
Go out both sides, light beam detection device office, effectively utilize space, eliminate input/output beam by single through hole
The peripheral optical device arrangements coupled and cause is narrow, improves space availability ratio, increases port number, simplifies light
Road adjusts.
A present invention concave mirror the most wherein is provided with multipair through hole, in every a pair through hole
Individual through hole is an entrance aperture of detection light beam, and another through hole is a perforation hole of detection light beam；Each
It is an optical absorption passage to through hole, or claims optical detecting channel.Each passage is respectively by two radial symmetric
The through hole arranged realizes detection light beam input and output.The present invention only disposes through hole on mirror, can keep away
Exempt from two sides mirror and place a passage input and the Position Design of output through hole and adjustment difficulty respectively, it is simple to adjust
Examination is installed, and improves and ensure installation accuracy.
The realization of the present invention also resides in: multichannel setting is selected in 2 passages to 8 passages.This
Can be selected in 2 passages to unlimited number of passage on bright multichannel realization theory, engineering realizes basis
The port number that the number of gaseous species determines is with 2 to 8 passages for more preferably selecting.
Hinge structure, the invention have the advantages that
1. the multichannel of Multi-channel optical absorption plant is along mirror surface center multilamellar equal diameter circumferentially,
Making full use of the minute surface limited areal of reflecting mirror, effectively expand the quantity of sense channel, unitary device can be same
Step carries out detection of gas with multiple constituents, and detection efficiency is high；
2. each passage of multi-channel optical absorption detection device is along mirror surface equal diameter circumferentially, only
Needing a passage design, can realize circumferentially being arranged symmetrically with the realization of passage, multi-passage design simplifies, logical
Road extension is easy；
3. each passage of the present invention include two concave mirrors and wherein a pair on a reflecting mirror lead to
Hole, incident beam enters from entrance aperture, repeatedly turns back between two concave mirrors, by perforation hole outgoing,
Realize the detection to a kind of gas.Two through holes of the through hole pair of the present invention are about minute surface centrosymmetry, it is easy to
Process, install, position and debug, and convenient periphery inputs and the compact mounting arrangements of detection photoelectric device；
4. detection light beam the turning back in absorption plant of each passage of the present invention is shaped as envelope cross section is ellipse
Circle, fully uses the space between two reflecting mirrors, increases the kind of optical absorption means gas detecting；
5. each sense channel of the present invention only needs two sides concave mirror, simplifies Multi-channel optical absorption plant
Structure, reduces the manufacturing cost of multi-channel optical absorption detection device.
Accompanying drawing illustrates:
Fig. 1 is the multi-channel optical absorption detection device structural representation of the present invention, is also embodiment 1-
The top view of two channel optical absorption detecting devices in 12；
Fig. 2 is the left view of Fig. 1, in figure and be attached with two passages and turn back light path schematic diagram；
Fig. 3 is the two channel optical absorption detecting perspective views that the present invention realizes；
Fig. 4 is that the optical detecting channel non-equidistant of the present invention arranges schematic diagram；
Fig. 5 is the triple channel optical absorption detection device schematic diagram of the present invention, and additional triple channel is turned back
Light path；
Fig. 6 is the eight channel optical absorption detecting device schematic diagrams of the present invention, and additional eight passages are turned back
Light path.
Detailed description of the invention:
Below in conjunction with the accompanying drawings to the detailed description of the invention:
Embodiment 1
The present invention is a kind of multi-channel optical absorption detection device, includes housing 3 and is mounted thereon
Reflecting mirror, optical absorption detection device be provided with entrance aperture and perforation hole, the coaxial phase of two sides concave mirror
To placement, between two concave mirrors staggered relatively, form Multi-channel optical absorption detecting, see figure
1, the most staggered relatively have the 1st concave mirror the 1 and the 2nd concave mirror 2, and two sides is reflected by housing 3
Mirror is installed fixing, and multi-channel optical absorption detection device 4 is integrally formed.Optical absorption detection device 4 is also referred to as
It is also referred to as gas absorbing device for optical absorption means.In this example, the reflector type of each reflecting mirror is all ball
Face, the reflector curvature radius of two sides concave mirror is equal, and wherein a concave mirror is provided with multipair
Through hole, is two pairs of through holes in this example, and in two pairs of through holes, a through hole in every a pair through hole enters for detection light beam
Perforation, sees entrance aperture 5a in Fig. 1, and another through hole is detection beam exit hole, sees in Fig. 1
Perforation hole 5b, every a pair through hole, as through hole 5a and through hole 5b constitutes an optical absorption passage, each
Channel application is in the detection of a kind of specific gas composition, and detection light beam is repeatedly turned back whole in two concave mirrors
The Multi-channel optical absorption detecting that body is formed.The present invention is only by the coaxial composition staggered relatively of two sides concave mirror
Multi-channel optical absorption detection device, simplifies multi-channel optical absorption detection device structure, reduces multichannel light
Learn the manufacturing cost of absorption detecting device.
The detection light beam repeatedly folding between the concave mirror of two sides of each GAS ABSORPTION passage in the present invention
The ray envelop cross section of turning back returning formation is ellipse, sees Fig. 2.
The multipair through hole of the present invention along mirror surface center circumferentially, the center of every a pair through hole line
All with the center superposition of concave mirror, see Fig. 2, the optical axis of reflecting mirror and the center superposition of reflecting mirror.This
In example, multipair through hole is two right, two pairs of through holes along mirror surface symmetry circumferentially, and these two pairs of through holes
In, each through hole is equal to line of centres distance, and the entrance aperture of first pair of through hole is 5a, and perforation hole is
5b；The entrance aperture of second pair of through hole is 6a, and perforation hole is 6b, and light beam 7 enters from 5a, recessed by the 1st
Face reflecting mirror 1 is repeatedly turned back with the 2nd concave mirror 2 two-face mirror, through 5b outgoing, light beam 8 from
6a enters, and repeatedly turning back by two-face mirror, through 6b outgoing, sees Fig. 1 and Fig. 2.Work as the present invention
Multi-channel optical absorption detection device to relevant gas detecting system connection work time, outgoing beam is by light
Electric explorer receives, computer disposal provide testing result.
During components many to gas detection, prior art uses single channel gas long-range absorption plant, needs
Asking quantity many, the system structure complexity caused and the problem involved great expense, the present invention passes through optical texture and light
Learn design and the optimization of transmission mode, be effectively simplified multicomponent gas spectral absorption structure of the detecting device, also
Simplify the composition of whole detecting system.The unitary device of the present invention can synchronize to carry out multicomponent gas inspection
Surveying, detection efficiency is high.The composite can be widely applied to multicomponent gas monitoring and spectrum analysis workplace.
Embodiment 2
Composition and the structure of multi-channel optical absorption detection device fill with embodiment 1, absorption detecting of the present invention
Put simple in construction, including: the two sides concave mirror being arranged on housing 3, two sides concave mirror is coaxial
Staggered relatively, the optical axis of two concave mirrors overlaps, the reflector curvature radius phase of two-face mirror
Deng.Arranging multipair through hole in two sides concave mirror wherein one side, multipair through hole is along mirror surface circumference cloth
Put.The hole line of centres of the every pair of through hole center by minute surface, a through hole in every a pair through hole is used for examining
The entrance aperture of light-metering bundle, another through hole is for detecting the perforation hole of light beam, every a pair entrance aperture, perforation hole
Collectively constituting an optical detecting channel with two-face mirror, the light beam of each sense channel is turned back repeatedly, folding
Returning the ray envelop cross sectional shape repeatedly formed is ellipse.
Two sides concave mirror is the most staggered relatively, the distance that two sides concave mirror is the most staggered relatively
Relevant to the radius of curvature of reflecting mirror, distance is chosen by choosing, and in formula, L is the centre-to-centre spacing of two-face mirror,
R is the radius of curvature of reflecting mirror.Distance between two minute surfaces is relevant to the radius of curvature of reflecting mirror, sees figure
1, limited by factors such as processing, after the radius of curvature of reflecting mirror determines, utilized formula distance between mirrors that is two
The centre-to-centre spacing of face reflecting mirror determines therewith, wherein r is the hole centre distance of through hole pair, namely through hole pair
Hole line of centres length.
Embodiment 3
The composition of multi-channel optical absorption detection device and structure are with in embodiment 1-2, this example two reflections
The reflector type of mirror is parabola, and the reflecting mirror that simply face type is different needs differently configured housing 3, makes two
The reliable and stable connection of person.
Embodiment 4
The composition of multi-channel optical absorption detection device and structure are with in embodiment 1-3, this example, and two to logical
Hole is along mirror surface circumferentially.See Fig. 1, on the 1st concave mirror 1, have along reflecting surface circumference
Detection entrance aperture 5a of light beam and the through hole pair of perforation hole 5b, and entrance aperture 6a and perforation hole 6b's is logical
Hole pair, the center centrally through reflecting mirror of two hole lines of each through hole pair, two holes in each hole pair
Centrosymmetry is distributed in one of reflecting mirror diametrically.Two holes pair: 5a and 5b, 6a and 6b respectively constitute one
Individual optical detecting channel.For preventing detection light beam from turning back leakage, entrance aperture or perforation hole between minute surface to reflection
The distance at mirror center takes 0.3～0.4d, and d is the diameter of mirror aperture, the i.e. the 1st concave mirror 1 and the 2nd
The diameter of concave mirror 2.In this example, entrance aperture or perforation hole take 0.4d to the distance of mirror center, ginseng
See Fig. 1.The present invention is circumferentially arranged symmetrically with passage, and multi-passage design simplifies easy.It addition, the present invention is easy
In processing, install, position and debugging, and convenient periphery inputs and the compact installation cloth of detection photoelectric device
Put.
Embodiment 5
The composition of multi-channel optical absorption detection device and structure with embodiment 1-4,
In this example, multipair through hole is two right, and two pairs of through holes along mirror surface symmetry circumferentially, and should
In two pairs of through holes, the distance of each through hole pair is equal, shown in Figure 2, for first passage,
Detection light beam 7 is coupled into optical absorption detection device 4 by entrance aperture 5a, incides on reflecting mirror 2,
Reflecting mirror 2 reflection detection light beam is on reflecting mirror 1, and reflecting mirror 1 reflexes to reflecting mirror 2 detection light beam again
On.Detection light beam 7 is repeatedly turned back between reflecting mirror 1 and reflecting mirror 2, until detection light beam is by instead
Penetrate mirror 2 and reflex to 5b in perforation hole, be coupled out optical absorption means 4, in like manner, second through perforation hole 5b
The detection light beam 8 of passage is also coupled out optical absorption means 4 through perforation hole 6b.According to paraxial optics principle,
Light beam between two-face mirror is turned back and can be solved by the compound lens that focal length is identical with light beam, if light beam warp
Cross and turn back for n time between two-face mirror, available focal length identical two-by-two at a distance of n the coaxial thin lens of L
Group solves the light beam diffracting position of n-th, and the position of n-th refraction point, under rectangular coordinate system, can be distinguished
Represent with following formula: xn=A cos (n θ+α), yn=B sin (n θ+β), above-mentioned parameter equation is expressed as wherein A
The major axis dimension in elliptical profile cross section formed for light beam of turning back, B is that the elliptical profile that light beam formed of turning back cuts
The minor axis dimension in face, C is constant, is taken as C=1, wherein x in the design0And y0It is respectively entrance aperture
Position coordinate parameters, and respectively incident beam cosine slope, θ be continuous two switch-back point of light beam relative to
The angle at concave mirror center, α and β is the phase angle related in Theoretical Calculation, is all taken as in design
Zero, as in figure 2 it is shown, the ray envelop that each passage is repeatedly turned back forms ellipse cross section, the present invention is abundant
Utilize the space between two reflecting mirrors, increase the kind of optical absorption means gas detecting.With a gas inspection
Survey the Multi-channel optical absorbing path of device, detection of gas with multiple constituents, low cost, multicomponent gas can be carried out
Detection efficiency is high, is applied to the technical fields such as gas-monitoring, detection and gas absorption spectroanalysis.
Embodiment 6
The composition of multi-channel optical absorption detection device and structure are with embodiment 1-5, two sides concave mirror
Reflector type be parabola, along mirror surface four pairs of through holes circumferentially be non-homogeneous circumferentially, this
Invention fully uses the space between two reflecting mirrors, increases the kind of optical absorption detection device gas detecting.
In this example, entrance aperture or perforation hole take 0.3d to the distance of mirror center.
Embodiment 7
The composition of multi-channel optical absorption detection device and structure are with embodiment 1-6, two sides concave mirror
Reflector type be ellipsoid, along wherein mirror surface two pairs of through holes circumferentially, two through hole pair
Hole centre distance is unequal, and the hole seeing Fig. 4,5a-5b through hole pair is more than 6a-6b through hole pair to centre-to-centre spacing
Hole is to centre-to-centre spacing.The present invention passes through the through hole non-isometric still make full use of minute surface limited to centre distance
Long-pending, improve optical absorption pond further to the scope of gas detecting and efficiency.
Embodiment 8
The composition of multi-channel optical absorption detection device and structure, with embodiment 1-7, see Fig. 2, detection
It is that continuous two switch-back point are relative to concave surface that the number of turns of light beam and the angle once rotated of turning back are expressed as θ
The angle of mirror center, M is that detection light beam is with reflecting mirror relative to pip between entrance aperture to perforation hole
The number of times that central rotation is 180 degree, N is that detection light beam is at the first concave mirror 1 or the second concave reflection
The number of pip on mirror 2.Being necessary for odd number for M of the present invention, N is necessary for even number.Each detection is led to
The optical path length in road can be equal, it is also possible to unequal.By the different values of N and M, it is achieved multichannel
The optical path length that optical absorption means difference passage is different.The detection light beam of each passage is in absorption plant
Light path be multiplied by following formula according to light beam number of turns N in absorption plant and carry out estimation the most slightly.
L=2Rsin (M π 2N) L-cos2 (M π 2N) cos2 [sin-1 (LR)]]] >
In formula, 1 is that between two concave mirrors, any one-time continuous is turned back the air line distance of 2, sees figure
3.As known detection light path and mirror curvature radius R, it is on detection light beam mirror wherein that N counts
Turn back and count, be also the number of times turned back of detection light beam, it is assumed that distance between mirrors is L, by light path and mirror spacing
The N value that can approximate from the ratio of L, generally sets between two sides concave mirror distance L and two concave mirrors
Arbitrarily turn back air line distance l of 2 of one-time continuous is equal, above formula can calculate M, formula further may be used
Show that detection light beam is turned back the angle, θ once rotated, detection light beam can be calculated according to the angle, θ rotated
Incident angle and shooting angle.
This formula proving is set up on the basis of linear hypothesis, because the detection light of each passage
On the basis of Shu Guangcheng is built upon linear hypothesis, the turn back air line distance of 2 of any one-time continuous has necessarily
Error, according to the specific rule of Bel-Lang Bo of optical absorption detection, the size of gas absorption signal is with detected
Density and the light path of gas are directly proportional, and can complete the highest gas composition of required precision with N × l light path formula and survey
Amount, when accurately measuring gas composition, can use laser range finder accurately to measure the light path of each passage.
Embodiment 9
The composition of multi-channel optical absorption detection device and structure, with embodiment 1-8, see Fig. 2, detection
The incident angle of light beam utilizes the location parameter of entrance aperture and detection light beam first time on relative specular to turn back
The angle, θ rotated, and in conjunction with the embodiments 5 xnAnd ynFormula determines detection light beam first reflection position
Parameter simultaneous calculates the incident angle of detection light beam；The shooting angle of detection light beam the most only needs perforation hole
Location parameter and the x of embodiment 5nAnd ynFormula determines that last reflection position simultaneous calculates.Due to
The commonly used paraxial optics of optical design of absorption detecting device calculates at present, last in actual design,
The optical design software such as good employing ZEMAX carry out simulating, verifying, can be effectively improved design accuracy.Due to
The present invention uses the technical scheme of circumferentially disposed through hole pair, the process of through hole processing on concave reflection minute surface,
After using 3 coordinates or one hole of 5 coordinate Cutter Body Processing with Machining Center, it is only necessary to by the card disc spins of clamping reflecting mirror
Given angle can Continuous maching next one through hole, complete this circumferentially through hole to processing.
Actual when carrying out gasmetry, using laser as detection light beam, laser detection light beam is by entrance aperture
Enter multi-channel gas detection device, after repeatedly turning back between the concave mirror of two sides, perforation hole export,
Output of laser detection light beam is detected the photodetector of system and receives, and then is provided detection knot by processing circuit
Really.The aperture of entrance aperture hole and perforation hole is slightly larger than the diameter of laser beam.
Embodiment 10
The composition of multi-channel optical absorption detection device and structure are with embodiment 1-9, gas gathering and transportation process
In need to while two kinds of gas ingredients of CH4 and H2S detect.Two channel optical using the present invention absorb
Detection device, detects while two kinds of gas ingredients of CH4 and H2S, and in this example, two couple of two passages is led to
Hole along mirror surface symmetry circumferentially, sees Fig. 2, and passage 5 is for the detection of CH4 gas, passage 6
For the detection of H2S gas, vice versa.The absorptance of the H2S absorptance relative to CH4 is in quantity
Upper little 2 orders of magnitude, and detection sensitivity is directly proportional to absorption coefficient and light path, in order to same
Optical absorption detection device improves the detection sensitivity of H2S, the light path of H2S gas detecting passage will be used for
Increasing, N or M that be multiplied in this example can extend the light path of H2S passage, and then it is logical to improve H2S
The detection sensitivity in road.
Certain passage concrete is determined by the selection detecting light source for detecting certain gas componant.
Embodiment 11
The composition of multi-channel optical absorption detection device and structure with embodiment 1-10, structure as above
The dual channel optical absorption plant built is only an example, and multi-channel optical absorption detection device can be designed to
Triple channel, four-way or more passage, passage number depend on the quantity of detected gas component.
Shown in Fig. 5 is the schematic diagram of triple channel optical absorption means, similar to dual channel optical absorption plant, three
Channel optical absorption plant includes that two curvature radius are identical, light shaft coaxle, in a distance and reflecting surface
Reflecting mirror staggered relatively, the reflecting surface face type of two reflecting mirrors can be sphere, parabola or ellipsoid etc.
Deng, the first concave mirror 1 has along mirror surface circumferential array three couples of through holes 5a-5b, 6a-6b and
7a-7b, two hole relative reflection minute surface centrosymmetry of every a pair through hole, and the line of centres position of two through holes
In mirror aperture diametrically, three pairs of through holes circumferentially can symmetry also can asymmetric be placed.Every a pair through hole
Form a sense channel.Such as: a passage 5a-5b detects for CO, and a passage 6a-6b is used for
The detection of CO2, a passage 7a-7b is used for the detection of O2.
Embodiment 12
The composition of multi-channel optical absorption detection device and structure with embodiment 1-11, structure as above
The triple channel optical absorption detection device built is only circumferentially one example of optical channel, multichannel absorption
Device can also include different pore size circumferentially, extends more passage as required.Shown in Fig. 6 it is
The schematic diagram of eight channel optical absorption plants, similar to triple channel optical absorption means, eight channel optical absorb
Device includes that two curvature radius are identical, light shaft coaxle, in a distance and staggered relatively anti-of reflecting surface
Penetrating mirror 1 and reflecting mirror 2, the reflecting surface face type of reflecting mirror is sphere, and reflecting mirror 1 has along mirror surface
Eight couples of through hole 5a-5b of two kinds of diameters of circumferential array, 6a-6b, 7a-7b, 8a-8b, 9a-9b, 10a-10b,
11a-11b and 12a-12b, the radial distribution at reflecting mirror 1 is 2 layers, and two holes of every a pair through hole are relative
Mirror surface centrosymmetry, and the line of centres in two holes is positioned at mirror aperture diametrically, every layer four to logical
Hole is the most uniformly placed, and uniformly places and is easy to improve machining accuracy and improve efficiency.Every a pair through hole is formed
One sense channel.Such as: passage detects for CO, passage for the detection of CO2, one
Individual passage detects for CH4 for the detection of H2S, a passage, and a passage is used for the inspection of C2H6
Surveying, a passage is used for the detection of C3H8, and a passage detects for C4H12, and a passage is used for
The detection of C5H14, a passage is used for the detection of O2.The each sense channel of the present invention only needs two sides concave surface
Reflecting mirror, simplifies Multi-channel optical absorption plant structure, also reduces being manufactured into of Multi-channel optical absorption plant
This.
One through hole of through hole centering of the present invention is for detecting the entrance aperture of light beam, and another through hole is used for
The perforation hole of detection light beam, every a pair entrance aperture, perforation hole and two-face mirror one sense channel of composition,
The light beam of each sense channel turn back shape envelope cross section for ellipse.Present configuration is simple, an inspection
Survey device can synchronize to carry out detection of gas with multiple constituents, simplify the many components of gas and detect required absorption detecting simultaneously
The quantity of device, reduces multicomponent gas spectral detection system structure, low cost, improves optical absorption
The stability in pond and detection efficiency.The present invention is widely used in gas detecting industry and gas absorption spectroanalysis
Etc. technical field.
Claims (5)
1. a multi-channel optical absorption detection device, includes housing and the reflecting mirror being mounted thereon, and it is special
Levy and be: two sides concave mirror is the most staggered relatively, the reflector curvature radius phase of two sides concave mirror
Deng, wherein a concave mirror is provided with multipair through hole, and a through hole in every a pair through hole is detection light
Bundle entrance aperture, another through hole is detection beam exit hole, and every a pair through hole is common with two sides concave mirror
Constituting an optical absorption passage, each channel application, in the detection of a kind of specific gas composition, detects light
Bundle is repeatedly turned back in two concave mirrors and Multi-channel optical absorption detecting is integrally formed；Multipair through hole is along wherein
Circumferentially, the midpoint of every a pair through hole line of centres is all heavy with the center of concave mirror for one mirror surface
Close.
Multi-channel optical absorption detection device the most according to claim 1, it is characterised in that: described manifold
The detection light beam of each optical absorption passage of road optical absorption detection device between the concave mirror of two sides repeatedly
Turn back the ray envelop cross section of turning back formed for ellipse.
Multi-channel optical absorption detection device the most according to claim 2, it is characterised in that: described two sides
The reflector type of concave mirror or sphere, or parabola or ellipsoid.
Multi-channel optical absorption detection device the most according to claim 3, it is characterised in that: described multipair
In through hole, the hole of each through hole pair is to centre distance or equal or unequal.
Multi-channel optical absorption detection device the most according to claim 4, it is characterised in that: described manifold
The quantity in road is selected in 2 passages to 8 passages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310755884.7A CN103712932B (en) | 2013-12-29 | 2013-12-29 | A kind of multi-channel optical absorption detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310755884.7A CN103712932B (en) | 2013-12-29 | 2013-12-29 | A kind of multi-channel optical absorption detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103712932A CN103712932A (en) | 2014-04-09 |
| CN103712932B true CN103712932B (en) | 2016-08-17 |
Family
ID=50406080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310755884.7A Expired - Fee Related CN103712932B (en) | 2013-12-29 | 2013-12-29 | A kind of multi-channel optical absorption detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103712932B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105548048B (en) * | 2015-12-29 | 2018-10-16 | 山东罗纳德分析仪器有限公司 | A kind of the spectrum sample gas chamber design method and device of more light path list gas chambers |
| CN105739104A (en) * | 2016-05-10 | 2016-07-06 | 力合科技（湖南）股份有限公司 | Multi-beam coupling device and detection air chamber |
| JP7075862B2 (en) * | 2017-10-16 | 2022-05-26 | 株式会社堀場製作所 | Analysis equipment |
| GB201812766D0 (en) * | 2018-08-06 | 2018-09-19 | Res & Innovation Uk | Optical multi-pass cells |
| CN109765184B (en) * | 2019-01-16 | 2022-06-07 | 深圳供电局有限公司 | Optical gas absorption cell and optical gas detection system |
| US11150130B2 (en) * | 2019-03-04 | 2021-10-19 | Si-Ware Systems | Compact multi-pass gas cell for multi-gas spectral sensors |
| CN111735784B (en) * | 2020-06-30 | 2022-06-10 | 北京师范大学 | Method for determining formation of linear light spots in multi-gas-reaction chamber, method for determining testing of multiple gases in multi-gas-reaction chamber and multi-gas-reaction chamber |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5726752A (en) * | 1995-08-07 | 1998-03-10 | Fuji Electric Co., Ltd. | Sample cell of multiple reflection type |
| CN1699971A (en) * | 2004-10-16 | 2005-11-23 | 中国科学院安徽光学精密机械研究所 | Method and apparatus for adjustable multiple reflection optical absorptions |
| FR2889599A1 (en) * | 2005-08-05 | 2007-02-09 | Centre Nat Rech Scient | MULTIPLE REFLECTION OPTICAL SYSTEM |
| CN102879898A (en) * | 2012-09-29 | 2013-01-16 | 太原科技大学 | Automatic tunable system with multiple optical paths |
| CN103430010A (en) * | 2011-03-24 | 2013-12-04 | 激光传感公司 | Multipass cell using spherical mirrors while achieving dense spot patterns |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7450226B2 (en) * | 2005-04-15 | 2008-11-11 | Xerox Corporation | Gray balance calibration of an imaging system |
-
2013
- 2013-12-29 CN CN201310755884.7A patent/CN103712932B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5726752A (en) * | 1995-08-07 | 1998-03-10 | Fuji Electric Co., Ltd. | Sample cell of multiple reflection type |
| CN1699971A (en) * | 2004-10-16 | 2005-11-23 | 中国科学院安徽光学精密机械研究所 | Method and apparatus for adjustable multiple reflection optical absorptions |
| FR2889599A1 (en) * | 2005-08-05 | 2007-02-09 | Centre Nat Rech Scient | MULTIPLE REFLECTION OPTICAL SYSTEM |
| CN103430010A (en) * | 2011-03-24 | 2013-12-04 | 激光传感公司 | Multipass cell using spherical mirrors while achieving dense spot patterns |
| CN102879898A (en) * | 2012-09-29 | 2013-01-16 | 太原科技大学 | Automatic tunable system with multiple optical paths |
Non-Patent Citations (1)
| Title |
|---|
| 光学气体吸收池在吸收光谱技术中的发展与应用;沈超等;《红外》;20121231;第33卷(第12期);第2页左栏第1.1节，第4页左栏2.1节，第5页左栏末段、右栏第1行，图4，5 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103712932A (en) | 2014-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103712932B (en) | A kind of multi-channel optical absorption detection device | |
| CN104122223B (en) | Double-optical-path multi-gas infrared sensor | |
| CN104949958B (en) | Novel Raman probe based on optical fiber beam splitter | |
| CN101165471B (en) | Multiple angle multiple-pass detection device | |
| CN101443647B (en) | Optical measurement system with simultaneous multiple wavelengths, multiple angles of incidence and angles of azimuth | |
| CN102564588A (en) | Vertical incidence broadband spectrograph using optical fiber bundle for light splitting and an optical measurement system | |
| CN109387226A (en) | A kind of star simulator system | |
| US4930865A (en) | Optical transmission spectrometer | |
| CN107941477A (en) | A kind of spectroscope measuring method and device that can accurately control incidence angle | |
| CN103512864A (en) | Optical measuring system for measuring reflectivity and transmittivity of substrate by utilizing parallel light | |
| CN102565008A (en) | Method and device for measuring transmittance of material by using integrating sphere | |
| CN103196552B (en) | Measuring device for light intensity of narrow-light-beam light-emitting diode (LED) lamp | |
| CN104931239A (en) | MTF test apparatus and method for small off-axis optical system | |
| CN201352150Y (en) | Photometric device | |
| CN203274910U (en) | Measuring device for light intensity of narrow-light-beam LED lamp | |
| CN111045200A (en) | Light reflection assembly for prolonging optical path | |
| CN202548051U (en) | Reflection cavity for odd-numbered and even-numbered optical paths | |
| CN106767679A (en) | A kind of photoelectric auto-collimation theodolite | |
| JP2000258246A (en) | Total luminous flux measuring method and device | |
| CN205538666U (en) | Gaseous calibration device of rotary balance formula dual component | |
| CN106290173B (en) | Device and method for detecting multidimensional distribution of gas concentration | |
| JP2005227019A (en) | Measuring method and measuring instrument for polarization axis | |
| JPH08240525A (en) | Multi purpose optical sensor | |
| CN206002687U (en) | A kind of detection Raman lidar light path system | |
| CN213021948U (en) | Photometric measurement device applied to distribution photometer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20191229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |