CN214539202U - Gas analyzer - Google Patents
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- CN214539202U CN214539202U CN202120237912.6U CN202120237912U CN214539202U CN 214539202 U CN214539202 U CN 214539202U CN 202120237912 U CN202120237912 U CN 202120237912U CN 214539202 U CN214539202 U CN 214539202U
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Abstract
The utility model belongs to the technical field of gaseous detection, in particular to gas analyzer has arranged light source subassembly, detection pond and has detected the light receiver subassembly in the cavity of box, and the detection pond is the cuboid form and wholly occupies the cavity middle part of box and arranges, and the two minor faces of detection pond close on the tank wall arrangement of the opposite side of the interior chamber of square box respectively, and the light source subassembly is located at the box cavity of detection pond long avris side with detecting the light receiver subassembly branch. The utility model discloses confirm the box size according to the measuring cell, can guarantee under the prerequisite of long optical distance, reduce the box size, rationally lay the side in the measuring cell with other subassemblies, can make the gas analysis appearance more small and exquisite portable when make full use of box inner space.
Description
Technical Field
The utility model belongs to the technical field of gaseous detection, in particular to gas analyzer.
Background
The portable gas analyzer can detect trace gas, is applied to gas leakage emergency detection, public safety gas detection and sudden accident site evaluation and treatment, can effectively prevent dangerous accidents and provides reliable basis for accident handling. The gas optical detection technology based on Fourier transform infrared spectroscopy (FTIR) is characterized in that natural environment is used as radiation background, infrared radiation of gas to be detected is detected according to temperature difference between the gas to be detected and the background, then the gas components and concentration are obtained by comparing the shape and size of absorption peaks of the gas with specific wavelength with a database after Fourier transform, and the gas optical detection technology has the characteristics of high sensitivity, high precision, high resolution, high measurement speed, low astigmatism, wide wave band and the like, and is widely applied to detection of gas pollutants. The traditional Fourier infrared spectrometer is large in size, is easily influenced by external environmental factors, and cannot adapt to field work.
Therefore, the chinese patent CN108519344A discloses a multi-component gas analysis fourier infrared spectrometer, in which the interferometer uses a double-angle mirror torsional and swinging 2 mirror to adjust the optical path difference, and although a higher resolution is obtained, a plurality of optical lenses are compactly arranged on the interferometer base, the structure is complex, and the laser as the reference beam enters the interferometer from the exit port, which is difficult to calibrate and inconvenient to assemble and maintain.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a gas analyzer can ensure the reliability of testing result when the light path is arranged to the compactness.
In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a gas analyzer, has arranged light source subassembly, detection pond and detection light receiving element in the cavity of box, and the detection pond is the cuboid form and wholly occupies the cavity middle part of box and arranges, and two minor faces of detection pond close to the tank wall arrangement of the opposite side of the interior chamber of square box respectively, and the light source subassembly is put at the box cavity department of detection pond long side branch with detecting light receiving element branch.
Compared with the prior art, the utility model discloses there are following technological effect: confirm the box size according to the measuring cell, can reduce the box size under the prerequisite of guaranteeing long optical distance, rationally lay other subassemblies in the side of measuring cell, can make gas analysis appearance more small and exquisite portable when make full use of box inner space.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
fig. 1 is a perspective view of the present invention;
fig. 2 and 3 are schematic diagrams of the optical system.
In the figure: A. the laser beam, the B infrared beam, the C coherent beam, the C1 transmitted beam, the C2. refracted beam, the D beam to be analyzed, the 10 box, the 20 light source assembly, the 21 laser, the 211 reflector III, the 212 reflector IV, the 22 infrared source, the 23 collimator, 231 the perforation hole, 24 interferometer, 241 beam splitter, 242 the fixed reflector I, 243 the fixed reflector II, 244 the movable double reflector, 25 reflector I, 30 detection cell, 40 detection light receiving assembly, 41 detector, 42 reflector II, 51 air inlet, 52 air outlet, 53 air pump.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.
The utility model provides a gas analyzer, has arranged light source subassembly 20 in the cavity of box 10, detect pond 30 and detect light receiving element 40, detect pond 30 and be the cuboid form and overall arrange in the cavity middle part of box 10, the two minor faces of detecting pond 30 are close to the tank wall of square box 10 inner chamber opposite side respectively and are arranged, light source subassembly 20 with detect the box cavity department that light receiving element 40 branch put at the long avris side of detecting pond 30.
Theoretically, the larger the optical path length of the detection light within the detection cell, the higher the detection accuracy. The size of the detection cell is usually larger, as shown in fig. 1, two inner wall surfaces of the rectangular casing-shaped box 10 which are oppositely arranged are arranged near the short side of the detection cell 30, that is, the interval between the two inner wall surfaces which are oppositely arranged in the box 10 is consistent with the length of the long side of the detection cell 30, the size of the box 10 is related to the size of the detection cell 30, and other components are arranged at the side of the detection cell 30, so that the size of the box 10 can be reduced while the internal space of the box 10 is fully utilized, and the gas analyzer is smaller and more portable.
Preferably, the light source assembly 20 and the detection light receiving assembly 40 are disposed on two sides of the detection cell 30. The chamber region of the housing 10 beside the long side of the detection cell 30 is smaller, the light source assembly 20 is located in the larger region, and the detection light receiving assembly 40 is located in the smaller region.
As shown in fig. 1-3, a light beam entrance port of the detection cell 30 is disposed at a side of the bottom of the cell body adjacent to the large chamber region, and a light beam exit port is disposed at a side of the bottom of the cell body adjacent to the small chamber region; the light source assembly 20 comprises an interferometer 24, the interferometer 24 is arranged close to the side wall of the detection cell 30, an incident port of the interferometer 24 is located far away from the side of the detection cell 30, an emergent port of the interferometer 24 is located at the bottom, a coherent light beam C emitted by the interferometer 24 is perpendicular to the incident light beam and points to the lower side wall of the box body 10, a first reflecting mirror 25 is arranged below the emergent port of the interferometer 24, and the emergent direction of the first reflecting mirror 25 points to the light beam incident port of the detection cell 30.
The interferometer 24 includes a beam splitter 241, and a combined beam formed by the laser beam a and the infrared beam B enters the beam splitter 241 to form a transmitted beam C1 and a reflected beam C2;
the transmitted light beam C1 enters the first fixed mirror 242 in a direction parallel to the combined light beam, is reflected and then returns to the beam splitter 241 along the original path, and leaves the interferometer 24 after being reflected by the beam splitter 241;
the reflected beam C2 is projected to the moving double mirror 244 in a direction perpendicular to the combined beam, and after two reflections, it is incident to the second fixed mirror 243 in the opposite direction, and the beam leaving the second fixed mirror 243 retroreflects to the beam splitter 241 in the opposite path and exits the interferometer 24 after being transmitted through the beam splitter 241;
the transmitted beam C1 and the reflected beam C2 are transmitted and refracted by the beam splitter 241 to form a coherent beam C, which exits the interferometer 24. The transmitted light beam C1 is transmitted by the beam splitter 241, reflected by the first fixed mirror 242 and reflected back to the beam splitter 241, refracted by the beam splitter 241 and exits the interferometer 24; the refracted light beam C2 is refracted by the beam splitter 241, reflected by the movable double mirror 244 and the second fixed mirror 243 to the beam splitter 241, transmitted by the beam splitter 241, and exits the interferometer 24.
The movable double-reflecting mirror 244 includes two reflecting mirror surfaces vertically arranged, and an angular bisector of the two reflecting mirror surfaces is perpendicular to the direction of the combined light beam, and the movable double-reflecting mirror 244 is displaced along the angular bisector direction. In this embodiment, the movable double-reflector 244 is a hollow angle mirror, and the optical characteristic of the hollow angle mirror is to reflect the incident beam by 180 ° without being affected by the incident angle and the posture of the angle mirror. The second fixed mirror 243 is located in the enclosed area of the beam splitter 241, the first fixed mirror 242 and the movable double mirror 244. As shown in fig. 2, the second fixed mirror 243 is located between the beam splitter 241 and the first fixed mirror 242 in the transverse direction to save the arrangement space, and the second fixed mirror 243 is located between the beam splitter 241 and the movable double mirror 244 in the longitudinal direction to prevent the second fixed mirror 243 from blocking the optical path of the transmitted light beam C1.
The light source assembly 20 includes a laser 21 emitting laser light and an infrared light source 22 emitting infrared light, a collimator 23 is disposed on an emitting light path of the infrared light source 22, a penetrating hole 231 for a laser beam a to pass through is disposed on the collimator 23, an extending direction of the penetrating hole 231 is parallel to an emitting direction of the collimated infrared beam B, and the beam splitter 241 is disposed on the emitting light path of the collimator 23.
When the laser device is used, a laser beam A emitted by the laser 21 penetrates through the collimator 23 after being reflected by the third reflector 211 and the fourth reflector 212, and an infrared beam B emitted by the infrared light source 22 is collimated by the collimator 23 and then is parallel to and coincided with the laser beam A penetrating through the collimator 23. The laser beam a and the infrared beam B enter the beam splitter 241 and enter the interferometer 24 to obtain a coherent beam C. The coherent light beam C is reflected by the first reflecting mirror 25 and then enters the detection cell 30 located beside the interferometer 24, the detection cell 30 is filled with gas to be detected, the coherent light beam C is reflected for multiple times in the detection cell and then exits to obtain a light beam D to be analyzed, and the light beam D to be analyzed is reflected by the second reflecting mirror 42 and then enters the detector 41 located beside the detection cell 30.
In the first embodiment, as shown in fig. 2, in order to reduce the lateral dimension of the box 10, the laser 21, which is cylindrical as a whole, is laterally arranged above or below the interferometer 24, the outgoing beam of the laser 21 is arranged in parallel with the outgoing beam direction of the collimator 23 and the beam irradiation direction is opposite, and the third reflector 211 arranged at the outgoing port of the laser 21 and the fourth reflector 212 arranged at the hole incident end of the collimator 23 divert the laser beam a and then superpose the laser beam a with the infrared beam B to enter the interferometer 24.
Second embodiment as shown in fig. 3, in order to ensure the displacement stroke of the movable double-mirror 244, the laser 21, which is cylindrical as a whole, is vertically disposed on the side of the interferometer 24 away from the detection cell 30, the outgoing beam of the laser 21 is disposed perpendicular to the outgoing direction of the beam of the collimator 23, and the exit of the laser 21 is provided with a third mirror 211 for diverting the laser beam a to be sent into the through hole 231.
The detection light receiving assembly 40 comprises a detector 41 and a second reflecting mirror 42, the second reflecting mirror 42 is arranged on the light outgoing path of the detection cell 30, the outgoing direction of the second reflecting mirror 42 points to the detector 41, and the detector 41 is adjacently arranged at the lower part of the right side of the detection cell 30.
The box 10 is further provided with an air path system, which includes an air inlet 51, an air outlet 52 and an air pump 53, which are disposed on the upper side of the detection light receiving assembly 40, and the air inlet 51, the air pump 53, the detection cell 30 and the air outlet 52 are sequentially communicated to form an air flow path.
Claims (10)
1. A gas analyzer, characterized in that: light source subassembly (20) have been arranged in the cavity of box (10), detect pond (30) and detect light receiving element (40), it arranges to detect pond (30) and be the cuboid form and whole in the cavity middle part of box (10), the two minor faces of detecting pond (30) are close to the box wall arrangement of the opposite side of the interior chamber of square box (10) respectively, light source subassembly (20) and detect light receiving element (40) branch put the box cavity department at detection pond (30) long avris side.
2. The gas analyzer of claim 1, wherein: the light source assembly (20) and the detection light receiving assembly (40) are respectively arranged at two sides of the detection pool (30), one side of the chamber region of the box body (10) beside the long side of the detection pool (30) is large, and the light source assembly (20) is positioned in a larger region.
3. The gas analyzer of claim 2, wherein: a light beam entrance port of the detection tank (30) is arranged at the side of the bottom of the tank body adjacent to the large chamber area, and a light beam exit port is arranged at the side of the bottom of the tank body adjacent to the small chamber area; the light source assembly (20) comprises an interferometer (24), the interferometer (24) is arranged close to the side wall of the detection cell (30), an incident port of the interferometer (24) is located far away from the side of the detection cell (30), an emergent port of the interferometer (24) is located at the bottom, a coherent light beam (C) emitted by the interferometer (24) is perpendicular to the incident light beam and points to the lower side wall of the box body (10), a first reflecting mirror (25) is arranged below the emergent port of the interferometer (24), and the emergent direction of the first reflecting mirror (25) points to the light beam incident port of the detection cell (30).
4. The gas analyzer of claim 3, wherein: the interferometer (24) comprises a beam splitter (241), and a combined beam formed by the laser beam (A) and the infrared beam (B) enters the beam splitter (241) to form a transmitted beam (C1) and a reflected beam (C2);
the transmitted light beam (C1) enters a first fixed mirror (242) along the direction parallel to the combined light beam, returns to the beam splitter (241) along the original path after being reflected, and leaves the interferometer (24) after being reflected by the beam splitter (241);
the reflected light beam (C2) is projected to the movable double-reflection mirror (244) along the direction vertical to the combined light beam, after two reflections, the reflected light beam enters the second fixed mirror (243) in the opposite direction, the light beam leaving the second fixed mirror (243) reflects back to the beam splitter (241) in the opposite path and leaves the interferometer (24) after being transmitted through the beam splitter (241);
the transmitted beam (C1) and the reflected beam (C2) are combined to form a coherent beam (C) that exits the interferometer (24).
5. The gas analyzer of claim 4, wherein: the movable double-reflecting mirror (244) comprises two reflecting mirror surfaces which are vertically arranged, the angular bisector of the two reflecting mirror surfaces is vertical to the direction of the combined light beam, and the movable double-reflecting mirror (244) displaces along the direction of the angular bisector; the second fixed mirror (243) is located in the enclosed area of the beam splitter (241), the first fixed mirror (242) and the movable double-reflecting mirror (244).
6. The gas analyzer of claim 4, wherein: the light source assembly (20) comprises a laser (21) emitting laser and an infrared light source (22) emitting infrared light, a collimator (23) is arranged on an emergent light path of the infrared light source (22), a penetrating hole (231) allowing a laser beam (A) to pass through and an extending direction of the penetrating hole (231) are formed in the collimator (23) and are parallel to an emergent direction of the collimated infrared light beam (B), and a beam splitter (241) is arranged on an emergent light path of the collimator (23).
7. The gas analyzer of claim 6, wherein: the laser (21) which is cylindrical overall is transversely arranged above or below the interferometer (24), the emergent light beam of the laser (21) and the emergent light beam of the collimator (23) are arranged in parallel, the irradiating direction of the light beam is opposite, and a third reflector (211) arranged at the emergent port of the laser (21) and a fourth reflector (212) arranged at the hole incident end of the collimator (23) turn the laser beam (A) to be superposed with the infrared light beam (B) and then enter the interferometer (24).
8. The gas analyzer of claim 6, wherein: the laser (21) which is columnar integrally is vertically arranged on the side, far away from the detection pool (30), of the interferometer (24), the outgoing light beam of the laser (21) is vertically arranged with the light beam outgoing direction of the collimator (23), and the outgoing port of the laser (21) is provided with a reflector III (211) which turns the laser beam (A) to be sent into the through hole (231).
9. The gas analyzer of claim 2, wherein: the detection light receiving assembly (40) comprises a detector (41) and a second reflecting mirror (42), the second reflecting mirror (42) is arranged on an emergent light path of the detection cell (30), the emergent direction of the second reflecting mirror (42) points to the detector (41), and the detector (41) is arranged at the lower part of the right side of the detection cell (30) in an adjacent mode.
10. The gas analyzer of claim 1 or 7, wherein: the box body (10) is also internally provided with an air path system which comprises an air inlet (51), an air outlet (52) and an air pump (53) which are arranged on the upper side of the detection light receiving assembly (40), wherein the air inlet (51), the air pump (53), the detection pool (30) and the air outlet (52) are communicated in sequence to form an air flow passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120237912.6U CN214539202U (en) | 2021-01-26 | 2021-01-26 | Gas analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120237912.6U CN214539202U (en) | 2021-01-26 | 2021-01-26 | Gas analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214539202U true CN214539202U (en) | 2021-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120237912.6U Active CN214539202U (en) | 2021-01-26 | 2021-01-26 | Gas analyzer |
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| CN (1) | CN214539202U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114354509A (en) * | 2022-01-06 | 2022-04-15 | 安徽庆宇光电科技有限公司 | Infrared laser adjusting structure |
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2021
- 2021-01-26 CN CN202120237912.6U patent/CN214539202U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114354509A (en) * | 2022-01-06 | 2022-04-15 | 安徽庆宇光电科技有限公司 | Infrared laser adjusting structure |
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| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: No. 228, Wanshui Road, high tech Zone, Hefei City, Anhui Province, 230088 Patentee after: Hefei Jinxing Intelligent Control Technology Co.,Ltd. Address before: No. 228, Wanshui Road, high tech Zone, Hefei City, Anhui Province, 230088 Patentee before: HEFEI GOLD STAR MECHATRONICS TECHNICAL DEVELOPMENT Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |