CN204287035U - Miniature infrared gas sensor - Google Patents
Miniature infrared gas sensor Download PDFInfo
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- CN204287035U CN204287035U CN201420510983.9U CN201420510983U CN204287035U CN 204287035 U CN204287035 U CN 204287035U CN 201420510983 U CN201420510983 U CN 201420510983U CN 204287035 U CN204287035 U CN 204287035U
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- reflecting surface
- curved surface
- reflecting
- light source
- collectiong focusing
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Abstract
The utility model provides a kind of Miniature infrared gas sensor, comprise optical cavity, signal acquisition circuit plate and the infrared light supply be connected on described signal acquisition circuit plate and detector, the chamber wall of described optical cavity is provided with light source mounting hole and detector mounting hole, described infrared light supply is arranged in described light source mounting hole, and described detector is arranged in described detector mounting hole; Described optics cavity body cavity face, described light source enclosing reflecting surface, described reflecting curved surface and described collectiong focusing reflecting surface form the light path of infrared gas sensor, and when ensureing long light-path, described optical cavity is little as far as possible.This Miniature infrared gas sensor has that structure is simple, easy to assembly, the advantage of low-profile, optical path length.
Description
Technical field
The utility model belongs to sensor technical field, specifically, relate to a kind of Miniature infrared gas sensor.
Background technology
Infrared gas sensor uses NDIR (Non-Dispersive Infrared) (NDIR) principle to detect the object gas existed in air.Infrared gas sensor is made up of infrared light supply, optical cavity, detector, Signal sampling and processing circuit four part usually.Common infrared gas sensor adopts infrared light supply to launch infrared spectrum in one end of optical cavity, detector receives the optical texture of infrared spectrum in other one end of optical cavity, after infrared spectrum sends, absorbed by the object gas of optical cavity and converge on detector after optical cavity inwall multiple reflections, being analyzed the information just obtaining object gas by the spectral signal received detector.
Mostly common infrared light supply and detector are cylindric, infrared light supply and detector need and optical cavity is combined into a complete light path, and the pin of infrared light supply and detector needs welding on circuit boards, this present situation causes the design limitation of optical cavity in the welding manner of infrared light supply, detector and circuit board.In order to reduce overall sensor size, need to reduce the volume of optical cavity, in order to the sensitivity and resolution that increase infrared gas sensor need again a longer light path.The design of optical cavity, plays vital impact to the factor such as performance, stability, sensitivity of infrared gas sensor.Along with the progress of science and technology, infrared gas sensor, to miniaturization, has the development trend that design technology compact optical cavity simple, easy to assembly becomes infrared gas sensor.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, thus provides a kind of and have that structure is simple, easy to assembly, the Miniature infrared gas sensor of low-profile, optical path length.
To achieve these goals, the technical scheme that the utility model adopts is: a kind of Miniature infrared gas sensor, comprise optical cavity, signal acquisition circuit plate and the infrared light supply be connected on described signal acquisition circuit plate and detector, the chamber wall of described optical cavity is provided with light source mounting hole and detector mounting hole, described infrared light supply is arranged in described light source mounting hole, and described detector is arranged in described detector mounting hole;
Light source enclosing reflecting surface is provided with in described optical cavity, reflecting curved surface and collectiong focusing reflecting surface, wherein, described light source enclosing reflecting surface is corresponding described infrared light supply respectively, described reflecting curved surface arrange in case the light that described infrared light supply is sent can reflecting curved surface described in coalescence directive or/and after described optical cavity inwall multiple reflections reflecting curved surface described in directive, the corresponding described collectiong focusing reflecting surface of described reflecting curved surface arrange in case by the light of reflecting curved surface described in directive can collectiong focusing reflecting surface described in coalescence directive or/and after described optical cavity inwall multiple reflections collectiong focusing reflecting surface described in directive, the corresponding described detector of described collectiong focusing reflecting surface is arranged so that by detector described in the light of collectiong focusing reflecting surface described in directive meeting coalescence directive.
Based on above-mentioned, described optical cavity is made up of base plate and the upper shell covered on described base plate, and wherein, described light source mounting hole and described detector mounting hole are arranged on described base plate, and described signal acquisition circuit plate is arranged on the bottom of described base plate.
Based on above-mentioned, described infrared light supply is column light source, and it is vertically welded on described signal acquisition circuit plate.
Based on above-mentioned, described light source enclosing reflecting surface and described collectiong focusing reflecting surface are positioned at one end of described optical cavity, described reflecting curved surface is arranged on the other end of described optical cavity, and described reflecting curved surface and described light source enclosing reflecting surface, described collectiong focusing reflecting surface are relative.
Based on above-mentioned, described reflecting curved surface is elliptic cylinder, and two focuses of described smooth reflecting curved surface are the luminous end center of described infrared light supply and described collectiong focusing reflecting surface center respectively;
Or described reflecting curved surface is sphere, the centre of sphere of described reflecting curved surface is on the perpendicular bisector of the luminous end center of described infrared light supply and described collectiong focusing reflecting surface mid point line;
Or described reflecting curved surface is the face of cylinder, described reflecting curved surface is vertically set on described base plate, and the center of described reflecting curved surface is on the perpendicular bisector of the luminous end center of described infrared light supply and described collectiong focusing reflecting surface mid point line.
Based on above-mentioned, described light source enclosing reflecting surface is sphere, and the luminous end center of described infrared light supply is the centre of sphere of described light source enclosing reflecting surface;
Or described light source enclosing reflecting surface is parabolic cylinder, the luminous end center of described infrared light supply is the focus of described light source enclosing reflecting surface;
Or described light source enclosing reflecting surface is the combination of multiple plane and/or curved surface, and multiple described curved surface is sphere and/or parabolic cylinder, the luminous end center of described infrared light supply is the centre of sphere and/or the focus of multiple described curved surface.
Based on above-mentioned, described light source enclosing reflecting surface is formed by connecting by the first plane, the second parabolic cylinder, the 3rd plane, the 4th plane, the 5th plane, the 6th parabolic cylinder and the 7th planar sequence, infrared light supply radiation breach is provided with between described first plane and described 7th plane, the spacing of described first plane and described 7th plane equals the wide of described infrared light supply radiation breach, described 4th plane is relative with described infrared light supply radiation breach, and described second parabolic cylinder and described 6th parabolic cylinder are the symmetrical two parts of same parabolic cylinder.
Based on above-mentioned, described collectiong focusing reflecting surface is parabolic cylinder, and the center, photosensitive reception area of described detector is the focus of described collectiong focusing reflecting surface;
Or described collectiong focusing reflecting surface is sphere, the center, photosensitive reception area of described detector is the focus of described collectiong focusing reflecting surface;
Or described collectiong focusing reflecting surface is plane, described collectiong focusing reflecting surface is tilted to down;
Or described collectiong focusing reflecting surface is the combination of multiple plane and/or curved surface, multiple described curved surface is sphere and/or parabolic cylinder, and the center, photosensitive reception area of described detector is the focus of multiple described curved surface.
Based on above-mentioned, described optical cavity is provided with multiple gas diffusion window, and described gas diffusion window is provided with water proof and dust proof gas-permeable nets.
The utility model hinge structure has substantive distinguishing features and progress, specifically, described optical cavity is provided with described light source mounting hole and described detector mounting hole, described infrared light supply and described detector are connected with described signal acquisition circuit plate respectively, greatly facilitate the assembling of described infrared light supply, described detector and described signal acquisition circuit plate and the cooperation of described infrared light supply, described detector and described optical cavity.Furtherly, described light source enclosing reflecting surface, described reflecting curved surface, described collectiong focusing reflecting surface and described optical cavity inwall form the light path of gas sensor, and when ensureing long light-path, described optical cavity is little as far as possible.It has, and structure is simple, easy to assembly, the advantage of low-profile, optical path length.
Accompanying drawing explanation
Fig. 1 is plan structure schematic diagram of the present utility model.
Fig. 2 is cut-open view 1 of the present utility model.
Fig. 3 is cut-open view 2 of the present utility model.
Fig. 4 is broken away view of the present utility model.
In figure: 1. infrared light supply, 2. detector, 3. signal acquisition circuit plate, 4. light source mounting hole, 5. detector mounting hole, 6. base plate, 7. upper shell, 71. gas diffusion holes, 81. light source enclosing reflectings surface, 82. reflecting curved surfaces, 83 collectiong focusing reflectings surface, 84 infrared light supply radiation breach.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in detail.
As depicted in figs. 1 and 2, a kind of Miniature infrared gas sensor, comprise optical cavity, signal acquisition circuit plate 3 and the infrared light supply 1 be connected on described signal acquisition circuit plate and detector 2, the chamber wall of described optical cavity is provided with light source mounting hole 4 and detector mounting hole 5, described infrared light supply 1 to be arranged in described light source mounting hole 4, and described detector 2 is arranged in described detector mounting hole 5.Described optics cavity body lumen wall is provided with described light source mounting hole 4 and described detector mounting hole 5, and being connected on described signal acquisition circuit plate of described infrared light supply 1, described detector 2, greatly facilitates the assembling of described infrared light supply 1, described detector 2 and described signal acquisition circuit plate 3 and the cooperation of described infrared light supply 1, described detector 2 and described optical cavity.
Light source enclosing reflecting surface 81 is provided with in described optical cavity, reflecting curved surface 82 and collectiong focusing reflecting surface 83, wherein, described light source enclosing reflecting surface 81 is corresponding described infrared light supply 1 respectively, described reflecting curved surface 82 arranges so that reflecting curved surface 82 described in the light meeting coalescence directive sent by described infrared light supply 1 and reflecting curved surface 82 described in directive after described optical cavity inwall multiple reflections, the corresponding described collectiong focusing reflecting surface 83 of described reflecting curved surface 82 arranges the light of reflecting curved surface described in directive 82 is understood collectiong focusing reflecting surface 83 described in coalescence directive and collectiong focusing reflecting surface 83 described in directive after described optical cavity inwall multiple reflections, the corresponding described detector 2 of described collectiong focusing reflecting surface 83 is arranged so that by detector 2 described in the light of collectiong focusing reflecting surface 83 described in directive meeting coalescence directive.
Described light source enclosing reflecting surface 81 and described collectiong focusing reflecting surface 83 are positioned at one end of described optical cavity, described reflecting curved surface 82 is arranged on the other end of described optical cavity, and described reflecting curved surface 82 and described light source enclosing reflecting surface 81, described collectiong focusing reflecting surface 83 are relative.Most of light that described infrared light supply 1 gives off gathers on described reflecting curved surface 82 through described light source enclosing reflecting surface 81 reflection, reflexed on described collectiong focusing reflecting surface 83 by described reflecting curved surface 82 again, finally reflexed to the photosensitive reception area of described detector 3 by described collectiong focusing reflecting surface 83; Small part light directly arrives the photosensitive reception area of described detector 3 through the inwall multiple reflections of described optical cavity or is finally reflexed to the photosensitive reception area of described detector 3 through multiple reflections by described collectiong focusing reflecting surface 83, when ensureing long light-path, described optical cavity is little as far as possible.
Described optical cavity is made up of base plate 6 and the upper shell 7 covered on described base plate 6, and wherein, described light source mounting hole 4 and described detector mounting hole 5 are arranged on described base plate 6, and described signal acquisition circuit plate 3 is arranged on the bottom of described base plate 6.
The utility model provides a kind of concrete embodiment, and described infrared light supply 1 is column light source, and it is vertically welded on described signal acquisition circuit plate 3.
Described reflecting curved surface 82 is the face of cylinder, and described reflecting curved surface 82 is vertically set on described base plate 6, and the center of described reflecting curved surface 82 is on the perpendicular bisector of the luminous end center of described infrared light supply 1 and described collectiong focusing reflecting surface 83 mid point line.
Described reflecting curved surface can be set to elliptic cylinder in other embodiments, and two focuses of described smooth reflecting curved surface are the luminous end center of described infrared light supply and described collectiong focusing reflecting surface center respectively.Or described reflecting curved surface is set to sphere, the centre of sphere of described reflecting curved surface is on the perpendicular bisector of the luminous end center of described infrared light supply and described collectiong focusing reflecting surface mid point line.
No matter described reflecting curved surface is elliptic cylinder or sphere, or the face of cylinder, and its effect is that the most of light reflection given off by described infrared light supply converges on described collectiong focusing reflecting surface.
Described light source enclosing reflecting surface 81 is the combination of multiple plane and curved surface, and multiple described curved surface is parabolic cylinder, and the luminous end center of described infrared light supply is the focus of multiple described curved surface.
The utility model provides a kind of concrete structure, described light source enclosing reflecting surface 81 is by the first plane, second parabolic cylinder, 3rd plane, 4th plane, 5th plane, 6th parabolic cylinder and the 7th planar sequence are formed by connecting, infrared light supply radiation breach 84 is provided with between described first plane and described 7th plane, the spacing of described first plane and described 7th plane equals the wide of described infrared light supply radiation breach 84, described 4th plane is relative with described infrared light supply radiation breach 84, described second parabolic cylinder and described 6th parabolic cylinder are the symmetrical two parts of same parabolic cylinder.
Described light source enclosing reflecting surface can be set to sphere in other embodiments, and the luminous end center of described infrared light supply is the centre of sphere of described light source enclosing reflecting surface.Or described light source enclosing reflecting surface is set to parabolic cylinder, the luminous end center of described infrared light supply is the focus of described light source enclosing reflecting surface.
No matter described light source enclosing reflecting surface is sphere, parabolic cylinder, or the combination of multiple plane and curved surface, its effect is that the light reflection that given off by described infrared light supply 1 is to converging to described infrared light supply radiation breach 84, reflecting curved surface 82 described in direct directive or after described optical cavity inwall multiple reflections reflecting curved surface 82 described in directive, and the light preventing described infrared light supply 1 from giving off shines directly on described detector 2.
Described collectiong focusing reflecting surface 83 is planes, and described collectiong focusing reflecting surface 83 is tilted to down.
Described collectiong focusing reflecting surface can be set to sphere in other embodiments, and the center, photosensitive reception area of described detector is the focus of described collectiong focusing reflecting surface; Or described collectiong focusing reflecting surface is parabolic cylinder, the center, photosensitive reception area of described detector 2 is focuses of described collectiong focusing reflecting surface; Or described collectiong focusing reflecting surface is the combination of multiple plane and curved surface, multiple described curved surface is parabolic cylinder, and the center, photosensitive reception area of described detector 2 is focuses of multiple described curved surface.
No matter described collectiong focusing reflecting surface is sphere, parabolic cylinder, or plane, or the combination of multiple, its effect be by reflex to described collectiong focusing reflecting surface through described reflecting curved surface 82 or after described optical cavity inwall multiple reflections the light focusing of directive collectiong focusing reflecting surface to the photosensitive reception area of described detector 2.
Described optical cavity is provided with multiple gas diffusion window 71, facilitates gas exchanges inside and outside described optical cavity.Described gas diffusion window 71 is provided with water proof and dust proof gas-permeable nets.Anti-sealing, dust enter described optical cavity and are attached to its inwall, affect light reflection effect.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to embodiment of the present utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope of the utility model request protection.
Claims (9)
1. a Miniature infrared gas sensor, comprise optical cavity, signal acquisition circuit plate and the infrared light supply be connected on described signal acquisition circuit plate and detector, it is characterized in that: the chamber wall of described optical cavity is provided with light source mounting hole and detector mounting hole, described infrared light supply is arranged in described light source mounting hole, and described detector is arranged in described detector mounting hole;
Light source enclosing reflecting surface is provided with in described optical cavity, reflecting curved surface and collectiong focusing reflecting surface, wherein, described light source enclosing reflecting surface is corresponding described infrared light supply respectively, described reflecting curved surface arrange in case the light that described infrared light supply is sent can reflecting curved surface described in coalescence directive or/and after described optical cavity inwall multiple reflections reflecting curved surface described in directive, the corresponding described collectiong focusing reflecting surface of described reflecting curved surface arrange in case by the light of reflecting curved surface described in directive can collectiong focusing reflecting surface described in coalescence directive or/and after described optical cavity inwall multiple reflections collectiong focusing reflecting surface described in directive, the corresponding described detector of described collectiong focusing reflecting surface is arranged so that by detector described in the light of collectiong focusing reflecting surface described in directive meeting coalescence directive.
2. Miniature infrared gas sensor according to claim 1, it is characterized in that: described optical cavity is made up of base plate and the upper shell covered on described base plate, wherein, described light source mounting hole and described detector mounting hole are arranged on described base plate, and described signal acquisition circuit plate is arranged on the bottom of described base plate.
3. Miniature infrared gas sensor according to claim 1 and 2, is characterized in that: described infrared light supply is column light source, and it is vertically welded on described signal acquisition circuit plate.
4. Miniature infrared gas sensor according to claim 2, it is characterized in that: described light source enclosing reflecting surface and described collectiong focusing reflecting surface are positioned at one end of described optical cavity, described reflecting curved surface is arranged on the other end of described optical cavity, and described reflecting curved surface and described light source enclosing reflecting surface, described collectiong focusing reflecting surface are relative.
5. Miniature infrared gas sensor according to claim 4, is characterized in that: described reflecting curved surface is elliptic cylinder, and two focuses of described smooth reflecting curved surface are the luminous end center of described infrared light supply and described collectiong focusing reflecting surface center respectively;
Or described reflecting curved surface is sphere, the centre of sphere of described reflecting curved surface is on the perpendicular bisector of the luminous end center of described infrared light supply and described collectiong focusing reflecting surface mid point line;
Or described reflecting curved surface is the face of cylinder, described reflecting curved surface is vertically set on described base plate, and the center of described reflecting curved surface is on the perpendicular bisector of the luminous end center of described infrared light supply and described collectiong focusing reflecting surface mid point line.
6. Miniature infrared gas sensor according to claim 4, is characterized in that: described light source enclosing reflecting surface is sphere, and the luminous end center of described infrared light supply is the centre of sphere of described light source enclosing reflecting surface;
Or described light source enclosing reflecting surface is parabolic cylinder, the luminous end center of described infrared light supply is the focus of described light source enclosing reflecting surface;
Or described light source enclosing reflecting surface is the combination of multiple plane and/or curved surface, and multiple described curved surface is sphere and/or parabolic cylinder, the luminous end center of described infrared light supply is the centre of sphere and/or the focus of multiple described curved surface.
7. Miniature infrared gas sensor according to claim 6, it is characterized in that: described light source enclosing reflecting surface is by the first plane, second parabolic cylinder, 3rd plane, 4th plane, 5th plane, 6th parabolic cylinder and the 7th planar sequence are formed by connecting, infrared light supply radiation breach is provided with between described first plane and described 7th plane, the spacing of described first plane and described 7th plane equals the wide of described infrared light supply radiation breach, described 4th plane is relative with described infrared light supply radiation breach, described second parabolic cylinder and described 6th parabolic cylinder are the symmetrical two parts of same parabolic cylinder.
8. Miniature infrared gas sensor according to claim 4, is characterized in that: described collectiong focusing reflecting surface is parabolic cylinder, and the center, photosensitive reception area of described detector is the focus of described collectiong focusing reflecting surface;
Or described collectiong focusing reflecting surface is sphere, the center, photosensitive reception area of described detector is the focus of described collectiong focusing reflecting surface;
Or described collectiong focusing reflecting surface is plane, described collectiong focusing reflecting surface is tilted to down;
Or described collectiong focusing reflecting surface is the combination of multiple plane and/or curved surface, multiple described curved surface is parabolic cylinder, and the center, photosensitive reception area of described detector is the focus of multiple described curved surface.
9. Miniature infrared gas sensor according to claim 1, is characterized in that: described optical cavity is provided with multiple gas diffusion window, and described gas diffusion window is provided with water proof and dust proof gas-permeable nets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420510983.9U CN204287035U (en) | 2014-09-05 | 2014-09-05 | Miniature infrared gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420510983.9U CN204287035U (en) | 2014-09-05 | 2014-09-05 | Miniature infrared gas sensor |
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| Publication Number | Publication Date |
|---|---|
| CN204287035U true CN204287035U (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420510983.9U Expired - Fee Related CN204287035U (en) | 2014-09-05 | 2014-09-05 | Miniature infrared gas sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280358B (en) * | 2014-09-05 | 2017-11-21 | 汉威科技集团股份有限公司 | Miniature infrared gas sensor |
| US10161859B2 (en) | 2016-10-27 | 2018-12-25 | Honeywell International Inc. | Planar reflective ring |
| CN110455984A (en) * | 2018-05-07 | 2019-11-15 | 中国石油化工股份有限公司 | Gas concentration sensor caliberating device and method |
| US10613028B2 (en) | 2017-12-22 | 2020-04-07 | Elt Sensor Corp. | Optical cavity for gas sensor and gas sensor having optical cavity |
-
2014
- 2014-09-05 CN CN201420510983.9U patent/CN204287035U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280358B (en) * | 2014-09-05 | 2017-11-21 | 汉威科技集团股份有限公司 | Miniature infrared gas sensor |
| US10161859B2 (en) | 2016-10-27 | 2018-12-25 | Honeywell International Inc. | Planar reflective ring |
| US10613028B2 (en) | 2017-12-22 | 2020-04-07 | Elt Sensor Corp. | Optical cavity for gas sensor and gas sensor having optical cavity |
| CN110455984A (en) * | 2018-05-07 | 2019-11-15 | 中国石油化工股份有限公司 | Gas concentration sensor caliberating device and method |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20170905 |
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| CF01 | Termination of patent right due to non-payment of annual fee |