CN202018419U - Gas detection platform adopting Herroitt multiple reflection sample room - Google Patents
Gas detection platform adopting Herroitt multiple reflection sample room Download PDFInfo
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- CN202018419U CN202018419U CN2011201063705U CN201120106370U CN202018419U CN 202018419 U CN202018419 U CN 202018419U CN 2011201063705 U CN2011201063705 U CN 2011201063705U CN 201120106370 U CN201120106370 U CN 201120106370U CN 202018419 U CN202018419 U CN 202018419U
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- sample chamber
- infrared
- herroitt
- detection platform
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Abstract
The utility model relates to a detection device for gas concentration, in particular to a gas detection platform adopting a Herroitt multiple reflection sample room, which comprises a sample room casing, an infrared light emitting device, a light receiving device and a conjugate infrared reflecting device, wherein, an air inlet and an air outlet are formed on the sample room casing; an incidence direction changing device and an emergence direction changing device are arranged inside an inner chamber; the conjugate infrared reflecting device comprises two concave infrared reflecting mirrors which are respectively fixed at two ends of the sample room casing; and rays emitted from the infrared light emitting device enter the inner chamber of the sample room casing, are reflected between the two concave infrared reflecting mirrors repeatedly after reflected by the incidence direction changing device, and are reflected onto the light receiving device finally through the emergence direction changing device. The practical optical path of the gas detection platform is more than six times (about 1m) the overall length of a main body of a multiple reflection cell, so that the NO measurement lower limit of the gas detection platform for the multiple reflection cell can reach lower than 25ppm.
Description
Technical field
The utility model relates to a kind of pick-up unit of gas concentration.
Background technology
Non-spectral type infrared-gas detector NDIR(non-dispersive infrared analyzer) have simple in structure, movement-less part, life-span is long, dependable performance, such environmental effects features of smaller such as simultaneous temperature pressure, and in for example vehicle exhaust detection of a plurality of occasions, the reliable and stable real-time measurements in field such as the continuous flue gas detection of CEMS become possibility.
Existing NDIR detection platform, generally include the electrical modulation infrared light supply, gold-plated pipe sample cell, the pyroelectric sensor of band narrow band pass filter, signal Processing adopts gold-plated pipe as sample cell, but the NOx measurement will reach the accuracy of detection requirement that is lower than 25ppm, just need the light path more than the long 70cm, if adopt single gold-plated pipe no matter on the installation of product still is the thermal stability of physical construction, all can't meet the demands.
Summary of the invention
In order to solve existing NDIR nitrogen oxygen detection platform light path and the conflicting problem of volume, the utility model provides the gas detection platform of many reflections of a kind of Herroitt of employing sample chamber, and this detection platform is a kind of long light path, small size, the low-loss gas detection platform of light path.
In order to realize above-mentioned purpose, the utility model has adopted following technical scheme:
A kind of gas detection platform that adopts many reflections of Herroitt sample chamber, this detection platform comprises sample chamber housing, infrared light emitter, optical pickup apparatus and conjugation infrared reflective device, infrared light emitter and optical pickup apparatus are separately positioned on the housing of sample chamber, the infrared light emitter is the initiating terminal of emission light, optical pickup apparatus is the end of emission light, and above the sidewall of sample chamber housing emission light initiating terminal one side, being provided with air intake, the sidewall below of the opposite side of sample chamber housing is provided with air out; Be provided with incident deviator and outgoing deviator in the housing inner chamber of sample chamber, described conjugation infrared reflective device adopts the conjugation concave surface ir reflector of Herroitt Cell principle to constitute by two, two conjugation concave surface ir reflectors are separately fixed at the two ends of sample chamber housing, the emission light of infrared light emitter is injected into sample chamber housing inner chamber, light process incident deviator reflection back through repeatedly reflection, is reflexed on the described optical pickup apparatus by the outgoing deviator between two conjugation concave surface ir reflectors at last.
As further improvement, also be provided with attemperating unit and pressure sensor device on the housing of described sample chamber.
As further improvement, described infrared light emitter is made of infrared LED light source and infrared collimation lens, and the middle part above the housing of sample chamber is provided with first through hole, the infrared LED light source is fixedly installed on the outside of first through hole, described infrared collimation lens is arranged in first through hole, and described incident deviator is arranged on the below of first through hole.
As further improvement, described incident deviator is the infrared plane mirror of adjustable fixed angle.
As further improvement, described optical pickup apparatus is made up of the pyroelectric sensor and the infrared condenser lens of band narrow band pass filter, and the left side above the housing of sample chamber is provided with second through hole, pyroelectric sensor is fixedly installed on the outside of second through hole, described infrared condenser lens is arranged in second through hole, and described outgoing deviator is arranged on the below of second through hole.
As further improvement, described outgoing deviator is for being the infrared plane mirror of adjustable fixed angle.
The utility model is repeatedly more than six times (about 1m) of reflection tank main body length overall owing to having adopted above-mentioned technical scheme, the actual light path of system, makes repeatedly the NO measurement lower limit of reflection tank gas detection platform be less than 25ppm.The utility model is applicable to the flue gas on-line analysis system, application scenarios such as vehicle exhaust detection system.
Compared with prior art, the utlity model has following characteristics:
1) precision height owing to adopted many reflective structures of Herroitt that the detection light path of NO has been brought up to one meter nearly, has improved measuring accuracy and measurement lower limit greatly;
2) life-span long owing to adopted the electrical modulation infrared light supply, therefore whole platform does not have the easily worn part chopper that traditional infrared detects, so the mission life of product can reach more than 10 years theoretically;
3) cost is low, utilizes repeatedly the high reflectance characteristic of reflective structure, and not only the loss with luminous energy reduces to minimum, but also has reduced the infrastructure cost of system.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the utility model sectional view.
Fig. 3 is a Herriott reflection tank schematic diagram.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is made a detailed explanation.
A kind of gas detection platform that adopts many reflections of Herroitt sample chamber as shown in Figure 1 and Figure 2, this detection platform comprises sample chamber housing 1, infrared light emitter 2, optical pickup apparatus 3 and conjugation infrared reflective device 14.The right sidewall top of sample chamber housing 1 is provided with air intake 8, and the sidewall below, left side of sample chamber housing 1 is provided with air out 9, also is provided with attemperating unit 4 and pressure sensor device 5 on the sample chamber housing 1.As shown in Figure 2, described infrared light emitter 2 is made of infrared LED light source 10 and infrared collimation lens 11, and the middle part above sample chamber housing 1 is provided with first through hole, infrared LED light source 10 is fixedly installed on the outside of first through hole, and described infrared collimation lens 11 is arranged in first through hole.As shown in Figure 2, described optical pickup apparatus 3 is made up of the pyroelectric sensor 12 and the infrared condenser lens 13 of band narrow band pass filter, and the left side above sample chamber housing 1 is provided with second through hole, pyroelectric sensor 12 is fixedly installed on the outside of second through hole, and described infrared condenser lens 13 is arranged in second through hole.
As shown in Figure 2, be provided with incident deviator 6 and outgoing deviator in sample chamber housing 1 inner chamber, incident deviator 6 and outgoing deviator 7 are the infrared plane mirror of adjustable fixed angle, incident deviator 6 is arranged on the below of first through hole, and outgoing deviator 7 is arranged on the below of second through hole.Conjugation infrared reflective device 14 adopts the conjugation concave surface ir reflector of Herroitt Cell principle to constitute by two, and two conjugation concave surface ir reflectors are separately fixed at the two ends of sample chamber housing 1.
As shown in Figure 3, the infrared light that infrared LED light source 10 sends, behind infrared collimation lens 11 collimations, enter sample chamber housing 1 inner chamber, again by incident deviator 6, adjust optical path direction, make it, form five secondary reflections according to light path shown in the Herroitt reflection tank schematic diagram, because the Herroitt reflection tank is made up of the spherical reflector of one group of mutual conjugation, with the light of incident by converge-disperse-repeatedly reflection such as converge, energy loss is very little, passes through outgoing deviator 7 at last, adjust optical path direction once more, leave sample chamber housing 1 inner chamber, and assemble, receive infrared light by pyroelectric sensor 12 at last through the infrared condenser lens 13 of outgoing.
Claims (6)
1. gas detection platform that adopts Herroitt many times reflection sample chamber, it is characterized in that: this detection platform comprises sample chamber housing (1), infrared light emitter (2), optical pickup apparatus (3) and conjugation infrared reflective device (14), infrared light emitter (2) and optical pickup apparatus (3) are separately positioned on the sample chamber housing (1), infrared light emitter (2) is the initiating terminal of emission light, optical pickup apparatus (3) is the end of emission light, and above the sidewall of sample chamber housing (1) emission light initiating terminal one side, being provided with air intake (8), the sidewall below of the opposite side of sample chamber housing (1) is provided with air out (9); Be provided with incident deviator (6) and outgoing deviator (7) in sample chamber housing (1) inner chamber, described conjugation infrared reflective device (14) adopts the conjugation concave surface ir reflector of Herroitt Cell principle to constitute by two, two conjugation concave surface ir reflectors are separately fixed at the two ends of sample chamber housing (1), the emission light of infrared light emitter (2) is injected into sample chamber housing (1) inner chamber, light process incident deviator (6) reflection back through repeatedly reflection, is reflexed on the described optical pickup apparatus (3) by outgoing deviator (7) between two conjugation concave surface ir reflectors at last.
2. a kind of gas detection platform that adopts many reflections of Herroitt sample chamber according to claim 1 is characterized in that: also be provided with attemperating unit (4) and pressure sensor device (5) on the sample chamber housing (1).
3. a kind of gas detection platform that adopts many reflections of Herroitt sample chamber according to claim 1, it is characterized in that: infrared light emitter (2) is made of infrared LED light source (10) and infrared collimation lens (11), and the middle part above sample chamber housing (1) is provided with first through hole, infrared LED light source (10) is fixedly installed on the outside of first through hole, described infrared collimation lens (11) is arranged in first through hole, and described incident deviator (6) is arranged on the below of first through hole.
4. according to claim 1 or 3 described a kind of gas detection platforms that adopt many reflections of Herroitt sample chamber, it is characterized in that: incident deviator (6) is the infrared plane mirror of adjustable fixed angle.
5. a kind of gas detection platform that adopts many reflections of Herroitt sample chamber according to claim 1, it is characterized in that: optical pickup apparatus (3) is made up of the pyroelectric sensor (12) and the infrared condenser lens (13) of band narrow band pass filter, and the left side above sample chamber housing (1) is provided with second through hole, pyroelectric sensor (12) is fixedly installed on the outside of second through hole, described infrared condenser lens (13) is arranged in second through hole, and described outgoing deviator (7) is arranged on the below of second through hole.
6. a kind of according to claim 1 or 5 gas detection platform that adopts many reflections of Herroitt sample chamber, it is characterized in that: outgoing deviator (7) is the infrared plane mirror of adjustable fixed angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201063705U CN202018419U (en) | 2011-04-12 | 2011-04-12 | Gas detection platform adopting Herroitt multiple reflection sample room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201063705U CN202018419U (en) | 2011-04-12 | 2011-04-12 | Gas detection platform adopting Herroitt multiple reflection sample room |
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| Publication Number | Publication Date |
|---|---|
| CN202018419U true CN202018419U (en) | 2011-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201063705U Expired - Lifetime CN202018419U (en) | 2011-04-12 | 2011-04-12 | Gas detection platform adopting Herroitt multiple reflection sample room |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230882A (en) * | 2011-04-12 | 2011-11-02 | 朱坚磊 | Air testing platform adopting Herroitt multiple-reflection specimen chamber |
| CN103487401A (en) * | 2013-09-25 | 2014-01-01 | 河南省日立信股份有限公司 | Long-optical-path gas detection device with fine adjustment mechanism |
| CN106895293A (en) * | 2017-04-25 | 2017-06-27 | 苏州诺联芯电子科技有限公司 | Light source assembly and the gas sensor with the light source assembly |
| CN109696412A (en) * | 2018-12-20 | 2019-04-30 | 南京信息工程大学 | Infrared gas sensor and atmospheric pressure compensating method based on AGNES Optimized BP Neural Network |
-
2011
- 2011-04-12 CN CN2011201063705U patent/CN202018419U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230882A (en) * | 2011-04-12 | 2011-11-02 | 朱坚磊 | Air testing platform adopting Herroitt multiple-reflection specimen chamber |
| CN102230882B (en) * | 2011-04-12 | 2013-03-13 | 朱坚磊 | Air testing platform adopting Herroitt multiple-reflection specimen chamber |
| CN103487401A (en) * | 2013-09-25 | 2014-01-01 | 河南省日立信股份有限公司 | Long-optical-path gas detection device with fine adjustment mechanism |
| CN103487401B (en) * | 2013-09-25 | 2016-03-23 | 河南省日立信股份有限公司 | With the long light path gas-detecting device of micro-adjusting mechanism |
| CN106895293A (en) * | 2017-04-25 | 2017-06-27 | 苏州诺联芯电子科技有限公司 | Light source assembly and the gas sensor with the light source assembly |
| CN109696412A (en) * | 2018-12-20 | 2019-04-30 | 南京信息工程大学 | Infrared gas sensor and atmospheric pressure compensating method based on AGNES Optimized BP Neural Network |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111026 Effective date of abandoning: 20130313 |
|
| RGAV | Abandon patent right to avoid regrant |