CN220626170U - Gas detection module capable of denoising - Google Patents
Gas detection module capable of denoising Download PDFInfo
- Publication number
- CN220626170U CN220626170U CN202321769909.4U CN202321769909U CN220626170U CN 220626170 U CN220626170 U CN 220626170U CN 202321769909 U CN202321769909 U CN 202321769909U CN 220626170 U CN220626170 U CN 220626170U
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- 238000001514 detection method Methods 0.000 title claims abstract description 69
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 68
- 239000011261 inert gas Substances 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 3
- 238000000180 cavity ring-down spectroscopy Methods 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000001285 laser absorption spectroscopy Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a denoising gas detection module, which comprises a gas chamber body and a sealing cover covered on the gas chamber body, wherein the gas chamber body is provided with a first gas chamber, a second gas chamber, a third gas chamber, a fourth gas chamber and a fifth gas chamber, and a first spectroscope is arranged at the joint of the second gas chamber and the fourth gas chamber; the second beam splitter is arranged at the joint of the first air chamber, the second air chamber and the third air chamber; a third spectroscope is arranged at the joint of the third air chamber and the fifth air chamber; a fourth spectroscope is arranged at the joint of the fourth air chamber and the fifth air chamber; a laser is arranged in the first air chamber, a first detector component positioned behind the first spectroscope is arranged in the second air chamber, a second detector component positioned behind the third spectroscope is arranged in the third air chamber, and a third detector component positioned behind the fourth spectroscope is arranged in the fifth air chamber; the two optical paths are detected, the influence of inherent noise of the detection module can be eliminated, and the detection accuracy is improved.
Description
Technical Field
The utility model relates to the technical field of gas detection, in particular to a gas detection module capable of denoising.
Background
The laser light is absorbed when propagating in the gas, and the laser wavelengths that can be absorbed by different gases are different. Gas concentration detection can be performed by utilizing the principle of light intensity attenuation when laser propagates in gas, and typical methods are tunable semiconductor laser absorption spectroscopy (TDLAS) and cavity ring-down spectroscopy (CRDS). Besides the method, the method can also be used for measuring the gas concentration by utilizing a laser interference method, and the principle is that the gas concentration is different, so that the laser has different optical paths under the same geometric propagation distance, and the interference is formed by utilizing the optical path difference, so that the gas concentration detection is carried out.
The existing laser gas detection products mainly adopt a TDLAS method and a laser interference method, so that laser is mainly reflected back and forth in an air chamber to form a propagation path and is fully absorbed by detection gas to realize detection, but inherent noise interference exists in the detection particularly due to the self-contained structural characteristics of the detection products, the existing method is to directly process inherent noise by a software algorithm, and the noise corresponding to different types of detection products is different.
Therefore, the existing detection product denoising is mainly based on experience parameters, and the actual denoising calculation result has the condition of poor accuracy, so that certain error exists in gas concentration detection.
Disclosure of Invention
First technical problem
The utility model aims to provide a gas detection module capable of denoising, which solves the problem that a certain error exists in a gas concentration detection mode adopting empirical parameter denoising in the prior art.
(II) technical scheme
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the gas detection module capable of denoising comprises a gas chamber body and a sealing cover covered on the gas chamber body, wherein a first gas chamber, a second gas chamber, a third gas chamber, a fourth gas chamber and a fifth gas chamber are formed in the gas chamber body, the first gas chamber, the second gas chamber and the fourth gas chamber are communicated to form an inert gas channel, and the third gas chamber and the fifth gas chamber are communicated to form a gas channel to be detected; a first spectroscope is arranged at the joint of the second air chamber and the fourth air chamber; a second beam splitter is arranged at the joint of the first air chamber, the second air chamber and the third air chamber; a third spectroscope is arranged at the joint of the third air chamber and the fifth air chamber; a fourth spectroscope is arranged at the joint of the fourth air chamber and the fifth air chamber; the laser is arranged in the first air chamber, a first detector component positioned behind the first spectroscope is arranged in the second air chamber, a second detector component positioned behind the third spectroscope is arranged in the third air chamber, and a third detector component positioned behind the fourth spectroscope is arranged in the fifth air chamber; the vertical parts of the first air chamber, the second air chamber, the third air chamber and the fifth air chamber are arranged in parallel; the horizontal part of the third air chamber, the horizontal part of the fourth air chamber and the horizontal part of the fifth air chamber are arranged in parallel; a first reflecting mirror is arranged at one end part of the first air chamber, which is close to the third air chamber, and is used for reflecting laser to a second beam splitter; a second reflecting mirror is arranged at the corner of the horizontal part and the vertical part of the third air chamber, and the second reflecting mirror is used for reflecting laser to a third spectroscope; a third reflecting mirror is arranged at the corner of the horizontal part and the vertical part of the fifth air chamber, and the third reflecting mirror is used for reflecting laser to a fourth spectroscope; the air chamber body is provided with a first vent hole communicated with the first air chamber, a second vent hole communicated with the fourth air chamber, a third vent hole communicated with the third air chamber and a fourth vent hole communicated with the fifth air chamber.
Preferably, the first detector assembly includes a first mounting frame mounted in the first air chamber, and a first photodetector is mounted on the first mounting frame; the second detector assembly comprises a second mounting frame arranged in the third air chamber, and a second photoelectric detector is arranged on the second mounting frame; the third detector assembly comprises a third mounting frame arranged in the fifth air chamber, and a third photoelectric detector is arranged on the third mounting frame.
Preferably, the first beam splitter, the second beam splitter, the third beam splitter and the fourth beam splitter each have a beam splitting surface, and the beam splitting surfaces are used for splitting the incident laser into the transmitted laser and the reflected laser.
Preferably, the first detection light path comprises a first light path and a second light path which are formed by a second spectroscope after being emitted from the laser, the first light path propagates along the second air chamber and passes through the first spectroscope to be projected to the first detector assembly, and the second light path propagates along the third air chamber and passes through the third spectroscope to be projected to the second detector assembly.
Preferably, the device comprises a second detection light path, wherein the second detection light path comprises a first light path and a second light path which are formed by a second spectroscope and emitted by a laser, the first light path propagates along the second air chamber, is reflected by the first spectroscope and then is projected to a fourth spectroscope, and the second light path propagates along the third air chamber, is reflected by the third spectroscope and then is projected to the fourth spectroscope; interference light generated by the first light path and the second light path at the fourth spectroscope is projected to a third detector assembly.
(III) beneficial effects
After the inert gas channel and the gas channel to be detected are formed, two paths of detection light paths are formed after laser emitted by the laser passes through the second beam splitter, no detection light path can form two paths of light paths, one of the light paths enters the inert gas channel, the laser propagates under the condition of not being absorbed by the inert gas, so that the noise of the whole detection module can be detected, the other light path enters the gas channel to be detected, the noise can be removed by comparing with the detection result of the light path in the inert gas channel, the accurate concentration detection of the gas to be detected is obtained, and the accurate noise of the current detection module can be obtained during each detection, so that the detection accuracy can be improved; and errors existing in the prior art of denoising by adopting experience parameters are eliminated.
Drawings
FIG. 1 is a schematic diagram of an explosion structure according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram illustrating a first detection path according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram illustrating a second detection path according to an embodiment of the present utility model;
in fig. 1 to 3, the correspondence between the component names or lines and the drawing numbers is:
the air chamber body 11, the first vent 111, the fourth vent 112, the third vent 113, the second vent 114, the first air chamber 115, the second air chamber 116, the third air chamber 117, the fourth air chamber 118, the fifth air chamber 119, the cover 12, the laser 2, the first detector assembly 3, the first photodetector 31, the first mounting bracket 32, the second detector assembly 4, the second photodetector 41, the second mounting bracket 42, the third detector assembly 5, the third photodetector 51, the third mounting bracket 52, the first spectroscope 6, the second spectroscope 7, the third spectroscope 8, and the fourth spectroscope 9.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Referring to fig. 1 to 3, in the embodiment of the present utility model, a denoising gas detection module is provided, which includes a gas chamber body 11 and a cover 12 covered on the gas chamber body 11, wherein after the cover 12 is installed on the gas chamber body 11, the interior of the gas chamber body 11 is sealed, and specifically, a first gas chamber 115, a second gas chamber 116, a third gas chamber 117, a fourth gas chamber 118 and a fifth gas chamber 119 are provided on the gas chamber body 11, wherein the first gas chamber 115, the second gas chamber 116 and the fourth gas chamber 118 are communicated to form an inert gas channel, and the third gas chamber 117 is communicated with the fifth gas chamber 119 to form a gas channel to be detected; the inert gas channel and the gas channel to be tested are isolated and sealed, and particularly, sealant, viscose and the like can be filled in the gap to realize reliable sealing without air leakage, so that the condition that the inert gas and the gas to be tested are mixed is effectively avoided, and the concentration detection accuracy of the gas to be tested is ensured.
In order to realize the propagation path planning of the detection pipeline, a first spectroscope 6 is specifically arranged at the connection position of the second air chamber 116 and the fourth air chamber 118, a second spectroscope 7 is arranged at the connection position of the first air chamber 115, the second air chamber 116 and the third air chamber 117, a third spectroscope 8 is arranged at the connection position of the third air chamber 117 and the fifth air chamber 119, and a fourth spectroscope 9 is arranged at the connection position of the fourth air chamber 118 and the fifth air chamber 119; the first beam splitter 6, the second beam splitter 7, the third beam splitter 8 and the fourth beam splitter 9 all have beam splitting surfaces, and the beam splitting surfaces are used for splitting incident laser into transmitted laser and reflected laser, that is, the laser is split into two paths of laser after passing through the corresponding beam splitters. Therefore, two detection light paths can be realized, two detection results, such as one path of transmission laser and one path of reflection laser, can be further detected, and the accuracy of gas concentration detection can be further improved.
Specifically, the first air chamber 115 is internally provided with the laser 2, the second air chamber 116 is internally provided with the first detector assembly 3 positioned behind the first spectroscope 6, the third air chamber 117 is internally provided with the second detector assembly 4 positioned behind the third spectroscope 8, the fifth air chamber 119 is internally provided with the third detector assembly 5 positioned behind the fourth spectroscope 9, the laser emitted by the laser 2 passes through the second spectroscope 7 to form two paths, and in the first detection path, the detection result is detected by the first detector assembly 3 and the second detector assembly 4, and noise detected by the first detector assembly 3 is taken as a cancellation parameter. In the second detection light path, the detection result is detected by the third detector assembly 5 for interference light to directly eliminate noise influence. Therefore, the detection results of the two detection light paths can be realized, and the detection processes of contrast denoising and interference light detection are realized.
Specifically, the laser device comprises a first detection light path, the first detection light path comprises a first light path and a second light path which are formed by the laser device 2 through the second spectroscope 7, the first light path propagates along the second air chamber 116 and passes through the first spectroscope 6 and then is projected to the first detector assembly 3, the second light path propagates along the third air chamber 117 and passes through the third spectroscope 8 and then is projected to the second detector assembly 4, a first detection parameter of the laser after passing through the inert gas is obtained through the first detector assembly 3, noise of a detection module is contained, a second detection parameter of the laser after passing through the gas to be detected is obtained through the second detector assembly 4, and an accurate detection result of denoising is obtained by comparing the second detection parameter with the first detection parameter.
In another detection mode, the denoising detection result is obtained by detecting interference light generated by a first light path and a second light path, specifically, the denoising detection device comprises a second detection light path, wherein the second detection light path comprises a first light path and a second light path which are formed by passing through a second spectroscope 7 and emitted by a laser 2, the first light path propagates along the second air chamber 116, is reflected by the first spectroscope 6 and then is projected to a fourth spectroscope 9, and the second light path propagates along the third air chamber 117, is reflected by the third spectroscope 8 and then is projected to the fourth spectroscope 9; the interference light generated by the first light path and the second light path at the fourth spectroscope 9 is projected to the third detector assembly 5, and the interference light is generated at the light splitting surface of the fourth spectroscope 9 through the first light path and the second light path of the inert gas channel and the gas channel to be detected respectively by the same light path, and the two gases have different refractive indexes, so that a constant optical path difference is formed, and the interference condition is met. By detecting the interference light by the third detector assembly 5, an accurate detection result can be obtained.
Through the first detection light path and the second detection light path, noise inherent to the detection module can be denoised through a comparison method and an interference light method, and accurate detection parameters of the gas to be detected can be obtained.
Specifically, in order to make the whole detection module have smaller volume, each air chamber is reasonably distributed, and the vertical parts of the first air chamber 115, the second air chamber 116, the third air chamber 117 and the fifth air chamber 119 are arranged in parallel; the horizontal portion of the third air chamber 117, the horizontal portion of the fourth air chamber 118, and the horizontal portion of the fifth air chamber 119 are arranged in parallel; the loop structure similar to rectangular arrangement is formed among the air chambers, so that the volume of the air chamber body 11 can be effectively reduced.
However, at the turning point, the laser needs to be turned to 90 ° and, specifically, a first mirror is disposed at an end portion of the first air chamber 115 near the third air chamber 117, and the first mirror is used for reflecting the laser to the second beam splitter 7. Meanwhile, a second reflecting mirror is disposed at the corner of the horizontal portion and the vertical portion of the third air chamber 117, and the second reflecting mirror is used for reflecting the laser light to the third beam splitter 8. And a third reflecting mirror is arranged at the corner of the horizontal part and the vertical part of the fifth air chamber 119, and is used for reflecting the laser light to the fourth spectroscope 9.
Thus, the light path can be reversed at the position where the 90-degree turn is generated in each air chamber by the first reflecting mirror, the second reflecting mirror and the third reflecting mirror.
In order to facilitate the inflation and deflation operations of the inert gas channel and the gas channel to be tested, the gas chamber body 11 is provided with a first vent hole 111 communicated with the first gas chamber 115, a second vent hole 114 communicated with the fourth gas chamber 118, a third vent hole 113 communicated with the third gas chamber 117 and a fourth vent hole 112 communicated with the fifth gas chamber 119; the first vent hole 111 and the second vent hole 114 are used for inflating and deflating inert gas, and inflating and deflating gas to be measured through the third vent hole 113 and the fourth vent hole 112.
Specifically, the first detector assembly 3, the second detector assembly 4 and the third detector assembly 5 are convenient to install, wherein the first detector assembly 3 comprises a first mounting frame 32 installed in the first air chamber 115, and a first photoelectric detector 31 is installed on the first mounting frame 32; the second detector assembly 4 includes a second mounting frame 42 mounted in the third air chamber 117, and the second mounting frame 42 has a second photodetector 41 mounted thereon; the third detector assembly 5 includes a third mounting bracket 52 mounted within the fifth plenum 119, the third mounting bracket 52 having a third photodetector 51 mounted thereon. The first, second and third photodetectors 31, 41 and 51 are all of the same type and are all existing mature products.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (3)
1. The utility model provides a gaseous detection module that can denoise which characterized in that: the device comprises an air chamber body and a sealing cover covered on the air chamber body, wherein the air chamber body is provided with a first air chamber, a second air chamber, a third air chamber, a fourth air chamber and a fifth air chamber, the first air chamber, the second air chamber and the fourth air chamber are communicated to form an inert gas channel, and the third air chamber is communicated with the fifth air chamber to form a gas channel to be tested;
a first spectroscope is arranged at the joint of the second air chamber and the fourth air chamber;
a second beam splitter is arranged at the joint of the first air chamber, the second air chamber and the third air chamber;
a third spectroscope is arranged at the joint of the third air chamber and the fifth air chamber;
a fourth spectroscope is arranged at the joint of the fourth air chamber and the fifth air chamber;
the laser is arranged in the first air chamber, a first detector component positioned behind the first spectroscope is arranged in the second air chamber, a second detector component positioned behind the third spectroscope is arranged in the third air chamber, and a third detector component positioned behind the fourth spectroscope is arranged in the fifth air chamber;
the vertical parts of the first air chamber, the second air chamber, the third air chamber and the fifth air chamber are arranged in parallel; the horizontal part of the third air chamber, the horizontal part of the fourth air chamber and the horizontal part of the fifth air chamber are arranged in parallel;
a first reflecting mirror is arranged at one end part of the first air chamber, which is close to the third air chamber, and is used for reflecting laser to a second beam splitter;
a second reflecting mirror is arranged at the corner of the horizontal part and the vertical part of the third air chamber, and the second reflecting mirror is used for reflecting laser to a third spectroscope;
a third reflecting mirror is arranged at the corner of the horizontal part and the vertical part of the fifth air chamber, and the third reflecting mirror is used for reflecting laser to a fourth spectroscope;
the air chamber body is provided with a first vent hole communicated with the first air chamber, a second vent hole communicated with the fourth air chamber, a third vent hole communicated with the third air chamber and a fourth vent hole communicated with the fifth air chamber.
2. The denoised gas detection module of claim 1, wherein: the first detector assembly comprises a first mounting frame arranged in the first air chamber, and a first photoelectric detector is arranged on the first mounting frame;
the second detector assembly comprises a second mounting frame arranged in the third air chamber, and a second photoelectric detector is arranged on the second mounting frame;
the third detector assembly comprises a third mounting frame arranged in the fifth air chamber, and a third photoelectric detector is arranged on the third mounting frame.
3. The denoised gas detection module of claim 1, wherein: the first spectroscope, the second spectroscope, the third spectroscope and the fourth spectroscope are all provided with light splitting surfaces, and the light splitting surfaces are used for dividing the incident laser into transmission laser and reflection laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321769909.4U CN220626170U (en) | 2023-07-07 | 2023-07-07 | Gas detection module capable of denoising |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321769909.4U CN220626170U (en) | 2023-07-07 | 2023-07-07 | Gas detection module capable of denoising |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220626170U true CN220626170U (en) | 2024-03-19 |
Family
ID=90218551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321769909.4U Active CN220626170U (en) | 2023-07-07 | 2023-07-07 | Gas detection module capable of denoising |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220626170U (en) |
-
2023
- 2023-07-07 CN CN202321769909.4U patent/CN220626170U/en active Active
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