CN105466855A - Sample detecting device based on Herroitt multi-reflect pool - Google Patents
Sample detecting device based on Herroitt multi-reflect pool Download PDFInfo
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- CN105466855A CN105466855A CN201511023636.9A CN201511023636A CN105466855A CN 105466855 A CN105466855 A CN 105466855A CN 201511023636 A CN201511023636 A CN 201511023636A CN 105466855 A CN105466855 A CN 105466855A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
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Abstract
The invention discloses a sample detecting device based on a Herroitt multi-reflect pool. The sample detecting device comprises a detecting tube. The two axial ends of the detecting tube are provided with an incidence reflector and an outgoing reflector respectively. The inner cavity of the detecting tube serves as a detecting chamber. A gas inlet and a gas outlet which are communicated with the detecting chamber are formed in the detecting tube. The incidence reflector is fixed to one end of the detecting tube. An incidence hole is formed in the mirror face of the incidence reflector. The outgoing reflector is arranged at the other end of the detecting tube. Light rays emitting into the incidence hole are reflected multiple times on the two opposite mirror faces of the incidence reflector and the outgoing reflector. A light-permeable window for emitting out light rays reflected multiple times and making light rays received by a light detecting device is formed in the mirror face of the outgoing reflector. The sample detecting device is simple in structure, convenient to install, low in manufacturing cost, adjustable in light stroke, easy to obtain and free of independent additional direction change devices; the incidence hole and the light-permeable window are located in the two axial ends of the detecting tube respectively, and the light emitting device and the light detecting device can be conveniently installed.
Description
Technical field
The present invention relates to field of gas detection, especially, relate to a kind of sample detection means based on Herroitt multiple reflecting pool.
Background technology
In sample detection, in order to improve Monitoring lower-cut, increasing light path is unusual one of effective method; The method increasing light path is a lot, more typically has White pond and Herroitt pond etc.Such as, application number is the patent of invention of CN200810246800.6, discloses a kind of multiple reflections device based on White pool structure.White pool structure is simple, only need two pieces of concave mirrors, and reflection light point spaced apart is on two mirror surfaces, decreases the generation of interference, is also widely used.But it is little that it has aperture angle, not easily regulate, the incident less and installation of inconvenient laser instrument and detector with reflected light angle, simultaneously very high to position accuracy demand between eyeglass, and light path is usually unadjustable.Application number is the patent of invention of CN201110091139.8, disclose a kind of gas detection platform adopting Herroitt multiple reflections sample chamber, it arranges deviator at inner chamber, incident light and emergent light direction are controlled, the method can solve incident light and the too small problem of emergent light angle well, but has the following disadvantages: 1. deviator can occupy certain inner space, adds the volume of sample chamber, affect the order of reflection of light simultaneously, mirror mirror can not be made full use of; 2. this project organization is comparatively complicated, and it is convenient not to install, and requires very high to the cooperation between two reflecting optics simultaneously; 3. this device light path is fixing dead substantially, cannot accomplish adjustable.4., owing to adding two pieces of break-in catoptrons, cost also can increase relatively more.
For above-mentioned deficiency, in order to reduce processing, installation accuracy requirement and environmental change to the impact of Herroitt multiple reflecting pool, and realize the adjustable with satisfied detection demand of light path, need a kind of novel sample detection means based on Herroit multiple reflecting pool of design badly.
Summary of the invention
The invention provides a kind of sample detection means based on Herroitt multiple reflecting pool, to solve the processing of existing sample detection means, installation accuracy requires on the impact of Herroitt multiple reflecting pool or need, high and environmental change sets up separately that the mirror mirror that deviator causes can not make full use of, complex structure, installation fitness is high and manufacturing cost is high technical matters.
The technical solution used in the present invention is as follows:
Based on a sample detection means for Herroitt multiple reflecting pool, comprising: detector tube, detector tube two ends vertically install incident catoptron, outgoing catoptron respectively, and the inner chamber of detector tube is as sensing chamber;
Detector tube is provided with the air intake opening and gas outlet that are communicated with sensing chamber, and air intake opening is used for passing into testing sample gas, and gas outlet is used for gas and discharges;
Incidence reflection mirror is fixed on one end of detector tube, and the light minute surface of incidence reflection mirror offered for light emitting devices transmitting is injected in sensing chamber to carry out the entrance aperture of multiple reflections; Outgoing catoptron is arranged at the other end of detector tube, the light injected through entrance aperture carries out multiple reflections on two relative specular of incidence reflection mirror and outgoing catoptron, and the minute surface of outgoing catoptron is offered for the beam projecting after multiple reflections with the logical optical window received by optical detection device.
Further, the axle center that entrance aperture departs from incidence reflection mirror is arranged, and at least one emergent light spot of the light after the position of logical optical window on outgoing catoptron ensures multiple reflections is passed through.
Further, outgoing catoptron circumferentially rotatable adjustment on detector tube.
Further, logical optical window covers the distributing edge of the light after multiple reflections along outgoing catoptron radial direction along the length of outgoing catoptron radial direction, along the width of outgoing catoptron circumference, logical optical window at least ensures that an emergent light spot is passed through.
Further, logical optical window be square, circular, rhombus or irregular shape.
Further, cylindrically, air intake opening is positioned on the sidewall of detector tube one end detector tube, and gas outlet is positioned on the sidewall of the detector tube other end.
Further, be provided with between incidence reflection mirror and detector tube and/or between outgoing catoptron and detector tube for seal that is fixing and that be tightly connected.
Further, the light emitting devices be oppositely arranged with entrance aperture, the optical detection device be oppositely arranged with perforation hole is provided with outside detector tube.
Further, light emitting devices adopts infrared light emission device or generating laser, and through optical lens, the light of outgoing is imported sensing chamber through entrance aperture.
Further, optical detection device comprises Optical Receivers and the detection module for carrying out optical detection analysis, and Optical Receivers is used for emergent light being passed to detection module and analyzes to carry out detection.
The present invention has following beneficial effect:
The present invention is based on the sample detection means of Herroitt multiple reflecting pool, by installing incident catoptron respectively at detector tube two ends vertically, outgoing catoptron, and entrance aperture, logical optical window is separately positioned on incidence reflection mirror, on outgoing catoptron, light through entrance aperture incidence carries out multiple reflections through two relative specular of incidence reflection mirror and outgoing catoptron in sensing chamber, again through leading to optical window outgoing to be received by optical detection device, its structure is simple, facility is installed and low cost of manufacture, light path is adjustable, be easy to realize and without the need to setting up deviator separately, the minute surface taking full advantage of incidence reflection mirror and outgoing catoptron carries out light path reflection, and due to entrance aperture, logical optical window lays respectively at the two ends of detector tube axis, be convenient to the installation of light emitting devices and optical detection device.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to accompanying drawings, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the preferred embodiment of the present invention based on the sample detection means of Herroitt multiple reflecting pool;
Fig. 2 is the structural representation of preferred embodiment of the present invention incidence reflection mirror;
Fig. 3 is the structural representation of preferred embodiment of the present invention outgoing catoptron;
Fig. 4 is the distribution schematic diagram of flare on the minute surface of incidence reflection mirror of preferred embodiment of the present invention multiple reflections;
Fig. 5 is the distribution schematic diagram of flare on the minute surface of the outgoing catoptron not with logical optical window of preferred embodiment of the present invention multiple reflections;
Fig. 6 is the schematic diagram of the logical optical window outgoing of flare on outgoing catoptron of preferred embodiment of the present invention multiple reflections.
Description of reference numerals:
10, detector tube; 11, air intake opening; 12, gas outlet;
20, incidence reflection mirror; 21, entrance aperture;
30, outgoing catoptron; 31, logical optical window.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Not easily regulate for existing Herroitt pond, the installation of inconvenient laser instrument and detector and the position accuracy demand between eyeglass is high or Herroitt pond need set up separately deviator affect the order of reflection of light and complex structure, installation and light path inconvenience adjustment, problem that cost is high, the present embodiment provides a kind of novel sample detection means based on Herroitt multiple reflecting pool.With reference to Fig. 1, the present embodiment, based on the sample detection means of Herroitt multiple reflecting pool, comprising: detector tube 10, and detector tube 10 two ends vertically install incident catoptron 20, outgoing catoptron 30 respectively, and the inner chamber of detector tube 10 is as sensing chamber; Detector tube 10 is provided with the air intake opening 11 and gas outlet 12 that are communicated with sensing chamber, and air intake opening 11 is for passing into testing sample gas, and gas outlet 12 is discharged for gas; Incidence reflection mirror 20 is fixed on one end of detector tube 10, and the light minute surface of incidence reflection mirror 20 offered for light emitting devices transmitting is injected in sensing chamber to carry out the entrance aperture 21 of multiple reflections; Outgoing catoptron 30 is arranged at the other end of detector tube 10, the light injected through entrance aperture 21 carries out multiple reflections on incidence reflection mirror 20 with two relative specular of outgoing catoptron 30, and the minute surface of outgoing catoptron 30 is offered for the beam projecting after multiple reflections with the logical optical window 31 received by optical detection device.
The present embodiment is by installing incident catoptron 20 respectively at detector tube 10 two ends vertically, outgoing catoptron 30, and entrance aperture 21, logical optical window 31 is separately positioned on incidence reflection mirror 20, on outgoing catoptron 30, light through entrance aperture 21 incidence carries out multiple reflections through incidence reflection mirror 20 and two relative specular of outgoing catoptron 30 in sensing chamber, again through leading to optical window 31 outgoing to be received by optical detection device, its structure is simple, facility is installed and low cost of manufacture, be convenient to light path regulate, the minute surface taking full advantage of incidence reflection mirror and outgoing catoptron carries out light path reflection, and due to entrance aperture, logical optical window lays respectively at the two ends of detector tube axis, be convenient to the installation of light emitting devices and optical detection device.
Fig. 2 shows the planimetric map of the present embodiment incidence reflection mirror 20, and Fig. 3 shows the planimetric map of the present embodiment outgoing catoptron 30.In the present embodiment, incidence reflection mirror 20, outgoing catoptron 30 are arranged on the two ends of detector tube 10 respectively, and two eyeglasses are parallel and with one heart, relative distance meets multiple reflections condition, and incidence reflection mirror 20 is fixed on one end of detector tube 10 and seals, and do not need to regulate.Preferably, outgoing catoptron 30 circumferentially rotatable adjustment on detector tube 10.Preferably, outgoing catoptron 30 around detector tube 10 can 360 ° rotate and regulate, can seal through screw thread or trip bolt locking positioning after regulating.The present embodiment is by being set to circumferential adjustable structure by outgoing catoptron 30, the position being located at logical optical window 31 on outgoing catoptron 30 can be adjusted, and then realize emergent light aligning, both can play the effect ensureing emergent light outgoing, the adjustable of light path can also have been realized.
In the present embodiment, the axle center that entrance aperture 21 departs from incidence reflection mirror 20 is arranged, and at least one emergent light spot of the light after the position of logical optical window 31 on outgoing catoptron 30 ensures multiple reflections is passed through.
Herroitt multiple reflecting pool under normal circumstances, when position relationship meets a certain specified conditions, be bound to from this hole outgoing after the reflection of certain number of times from the light from the incidence of axle entrance aperture, namely usually entrance aperture and light hole be arranged on homonymy in prior art.And the reflection light point of multiple reflections is generally elliptic systems (with reference to Fig. 4, Fig. 5) on eyeglass, only has the circular distribution of specific incident angle.
Common Herroitt pond, below generation during several situation:
1), between two eyeglasses, during the deviation of position relationship generation certain limit, from the light from the incidence of axle entrance aperture, can be departed from this cannot penetrate from axle entrance aperture after multiple reflections;
2), when variation of ambient temperature causes light path to offset time, there will be light equally cannot the situation of outgoing;
3), some in particular cases, when light path needs to regulate time, the light path of Herroitt multiple reflecting pool is that changeless cannot accomplishing regulates substantially.
And due to homonymy installation laser instrument and detector, because angle between incident light and emergent ray is very little, when laser instrument and detector size are comparatively large, and time locus is limited, the problem of installation aspect can be caused cannot to solve or solve comparatively complicated.
The present invention is directed to above several situation, by having logical optical window 31 at outgoing catoptron 30, making the light after multiple reflections not from entrance aperture 21 outgoing of incidence reflection mirror 20, and directly tackling outgoing on logical optical window 31.Because the reflection spot on catoptron is generally oval distribution, therefore this logical optical window 31 is when selection one suitable width, can ensure to only have a hot spot to drop on this window, and logical light window is designed to a certain length, the elliptical shape surrounded regardless of flare can be ensured, a hot spot can be ensured and drop on this window.With reference to Fig. 6, namely logical optical window 31 covers the distributing edge of the light after multiple reflections along outgoing catoptron 30 radial direction along the length of outgoing catoptron 30 radial direction, along the width of outgoing catoptron 30 circumference, logical optical window 31 at least ensures that an emergent light spot is passed through.
The present embodiment solves that the light that above-mentioned position relationship, variation of ambient temperature of installing because of eyeglass cause cannot penetrate well, laser instrument and detector are installed limited, Herroitt multiple reflecting pool light path and fixed the problem that cannot regulate.Make the Herroitt multiple reflecting pool of high-precision requirement can be more easy and create at low cost.
Preferably, the present embodiment leads to rule or the irregular shapes such as optical window 31 is square, circle, rhombus.Namely the shape of logical optical window 31 does not limit, and at least one emergent light spot of the light after only need meeting multiple reflections is passed through.Preferably, logical optical window 31 covers the distributing edge of the light after multiple reflections along outgoing catoptron 30 radial direction along the length of outgoing catoptron 30 radial direction, namely all emergent light spot radially go up all by; Along the width of outgoing catoptron 30 circumference, logical optical window 31 at least ensures that an emergent light spot is passed through, namely do not get rid of and the emergent light spot of two or more can be caused to fall thereon.
Preferably, cylindrically, air intake opening 11 is positioned on the sidewall of detector tube 10 one end the present embodiment detector tube 10, and gas outlet 12 is positioned on the sidewall of detector tube 10 other end.Cylindric detector tube 10 structure, the circumference being convenient to installation and outgoing catoptron 30 regulates, and the internal volume of sensing chamber is minimum, is convenient to the fast exchange of gas to be measured.More preferably, in order to strengthen the impermeability in sensing chamber, between incidence reflection mirror 20 and detector tube 10 and/or between outgoing catoptron 30 and detector tube 10, be provided with the seal for being tightly connected.The present embodiment, seal is preferably O-ring seals.
In the present embodiment, outside detector tube 10, be provided with the light emitting devices be oppositely arranged with entrance aperture 21, the optical detection device be oppositely arranged with perforation hole.Wherein, light emitting devices adopts infrared light emission device or generating laser, and through optical lens, the light of outgoing is imported sensing chamber through entrance aperture 21; Optical detection device comprises Optical Receivers and the detection module for carrying out optical detection analysis, and Optical Receivers is used for emergent light being passed to detection module and analyzes to carry out detection.
Can learn from above description, the present embodiment is by installing incident catoptron 20, outgoing catoptron 30 respectively at detector tube 10 two ends vertically, and entrance aperture 21, logical optical window 31 are separately positioned on incidence reflection mirror 20, outgoing catoptron 30, light through entrance aperture 21 incidence carries out multiple reflections through incidence reflection mirror 20 and two relative specular of outgoing catoptron 30 in sensing chamber, again through leading to optical window 31 outgoing to be received by optical detection device, make the machining precision to reflection tank and installation requirement reduction, optical path adjusting is more easy and convenient; And decrease the impact of the light path skew caused due to environmental factors such as temperature, cause the situation that light cannot penetrate or can not penetrate completely, decrease the impact because the light path of installing and in process, trueness error causes offsets, make the situation that light cannot penetrate or can not penetrate completely.In addition, can regulate light path according to demand, very convenient.Separately, incident light and reflected light directional spreding, in sample cell both sides, are convenient to the installation of laser instrument and detector.Pick-up unit compact overall structure of the present invention, simplicity of design, and with low cost, light path is adjustable, be convenient to realize, thus the convenience meeting the Herroitt multiple reflecting pool of high-precision requirement, the demand that simply and at low cost manufactures, there is applicability widely.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the sample detection means based on Herroitt multiple reflecting pool, it is characterized in that, comprise: detector tube (10), described detector tube (10) two ends vertically install incident catoptron (20), outgoing catoptron (30) respectively, and the inner chamber of described detector tube (10) is as sensing chamber;
Described detector tube (10) is provided with the air intake opening (11) and gas outlet (12) that are communicated with described sensing chamber, described air intake opening (11) is for passing into testing sample gas, and described gas outlet (12) discharge for gas;
Described incidence reflection mirror (20) is fixed on one end of described detector tube (10), and the light minute surface of described incidence reflection mirror (20) offered for light emitting devices transmitting is injected in described sensing chamber to carry out the entrance aperture (21) of multiple reflections; Described outgoing catoptron (30) is arranged at the other end of described detector tube (10), the light injected through described entrance aperture (21) carries out multiple reflections on two relative specular of described incidence reflection mirror (20) with described outgoing catoptron (30), and the minute surface of described outgoing catoptron (30) is offered for the beam projecting after described multiple reflections with the logical optical window (31) received by optical detection device.
2. the sample detection means based on Herroitt multiple reflecting pool according to claim 1, is characterized in that,
The axle center that described entrance aperture (21) departs from described incidence reflection mirror (20) is arranged, and at least one emergent light spot of the light after the position of described logical optical window (31) on described outgoing catoptron (30) ensures described multiple reflections is passed through.
3. the sample detection means based on Herroitt multiple reflecting pool according to claim 2, is characterized in that,
The circumferentially rotatable adjustment on described detector tube (10) of described outgoing catoptron (30).
4. the sample detection means based on Herroitt multiple reflecting pool according to claim 3, is characterized in that,
Described logical optical window (31) covers the distributing edge of the light after described multiple reflections along described outgoing catoptron (30) radial direction along the length that described outgoing catoptron (30) is radial, along the width of described outgoing catoptron (30) circumference, described logical optical window (31) at least ensures that an emergent light spot is passed through.
5. the sample detection means based on Herroitt multiple reflecting pool according to claim 4, is characterized in that,
Described logical optical window (31) is square, circular, rhombus or irregular shape.
6., according to the arbitrary described sample detection means based on Herroitt multiple reflecting pool of claim 1 to 5, it is characterized in that,
Described detector tube (10) cylindrically, described air intake opening (11) is positioned on the sidewall of described detector tube (10) one end, and described gas outlet (12) are positioned on the sidewall of described detector tube (10) other end.
7. the sample detection means based on Herroitt multiple reflecting pool according to claim 6, is characterized in that,
Be provided with between described incidence reflection mirror (20) and described detector tube (10) and/or between described outgoing catoptron (30) and described detector tube (10) for seal that is fixing and that be tightly connected.
8. the sample detection means based on Herroitt multiple reflecting pool according to claim 6, is characterized in that,
The light emitting devices be oppositely arranged with described entrance aperture (21), the optical detection device be oppositely arranged with described perforation hole is provided with outside described detector tube (10).
9. the sample detection means based on Herroitt multiple reflecting pool according to claim 8, is characterized in that,
Described light emitting devices adopts infrared light emission device or generating laser, and through optical lens, the light of outgoing is imported described sensing chamber through described entrance aperture (21).
10. the sample detection means based on Herroitt multiple reflecting pool according to claim 8, is characterized in that,
Described optical detection device comprises Optical Receivers and the detection module for carrying out optical detection analysis, and described Optical Receivers is used for emergent light being passed to described detection module and analyzes to carry out detection.
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| CN201511023636.9A CN105466855B (en) | 2015-12-31 | 2015-12-31 | Sample detection means based on Herriott multiple reflecting pool |
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| CN201511023636.9A CN105466855B (en) | 2015-12-31 | 2015-12-31 | Sample detection means based on Herriott multiple reflecting pool |
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| CN105466855B CN105466855B (en) | 2018-11-30 |
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| CN105758803A (en) * | 2016-04-28 | 2016-07-13 | 中钢集团武汉安全环保研究院有限公司 | Laser gas detection platform with multiple-reflection long-optical-path high-temperature sample chamber |
| CN108007864A (en) * | 2017-11-08 | 2018-05-08 | 北京航天控制仪器研究所 | A kind of double window mirror optics cavity |
| CN110146471A (en) * | 2019-03-13 | 2019-08-20 | 常州龙新激光科技有限公司 | The design in the multiple round-trip reflected sample pond of small size |
| CN113155769A (en) * | 2021-03-18 | 2021-07-23 | 重庆科技学院 | Tunable spectrum-based variable optical path gas chamber component detection system and method |
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| CN105466855B (en) | 2018-11-30 |
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