CN216208547U - Detection mechanism and PPM concentration sensor - Google Patents
Detection mechanism and PPM concentration sensor Download PDFInfo
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- CN216208547U CN216208547U CN202122737607.6U CN202122737607U CN216208547U CN 216208547 U CN216208547 U CN 216208547U CN 202122737607 U CN202122737607 U CN 202122737607U CN 216208547 U CN216208547 U CN 216208547U
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Abstract
The application relates to a detection mechanism and PPM concentration sensor for detect the carbon dioxide concentration in the air, include: a light source; a detection component; a reflective component; and a separator; the reflecting assembly comprises a diverging module and an intermediate module, the diverging module is used for diverging light, the intermediate module is used for reflecting the light in the diverging module, the light source is arranged on one side of the diverging module, the diverging module is provided with a protruding surface on the opposite side of the light source, and the light is reflected to the intermediate module after being diverged again on the protruding surface; the detection assembly is provided with a focus surface, and the focus surface is arranged on one side of the middle module so as to reflect light rays passing through the middle module into the detection assembly. This application has prolonged the transmission distance of light in the reflection cavity through the setting of above-mentioned reflection assembly and separator, has increased the absorption time of carbon dioxide to the infrared light of specific wavelength, and then makes carbon dioxide sensor's testing result more accurate.
Description
[ technical field ] A method for producing a semiconductor device
The application relates to a detection mechanism and a PPM concentration sensor, and belongs to the technical field of carbon dioxide concentration detection.
[ background of the invention ]
The PPM concentration sensor is widely applied to various devices needing to detect the concentration of carbon dioxide, most of the NDIR infrared carbon dioxide concentration sensors are NDIR infrared carbon dioxide concentration sensors, and the distance from light rays emitted by a light source of the NDIR infrared carbon dioxide concentration sensor in the prior art to the carbon dioxide sensor is short, so that the absorption time of carbon dioxide to infrared light with a specific wavelength is short, and the detection result of the whole NDIR infrared carbon dioxide concentration sensor is not accurate enough.
Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.
[ Utility model ] content
The application aims to provide a detection mechanism with a reflection assembly and a separator and a PPM concentration sensor.
The purpose of the application is realized by the following technical scheme: a detection mechanism for detecting a carbon dioxide concentration in air, comprising:
a light source;
the detection assembly is positioned on the same side with the light source;
the reflection assembly is provided with a reflection cavity and is used for reflecting the light rays emitted by the light source to the detection assembly; and
a separator disposed within the reflective cavity to separate the light source and the detection assembly;
the reflecting assembly comprises a diverging module and an intermediate module, wherein the diverging module is used for diverging the light rays, and the intermediate module is used for reflecting the light rays in the diverging module; the light source is arranged on one side of the divergence module, the divergence module is provided with a protruding surface on the opposite side of the light source, and the light rays are reflected to the middle module after being diverged again on the protruding surface;
the detection assembly is provided with a focus surface, and the focus surface is arranged on one side of the middle module so as to reflect light rays passing through the middle module into the detection assembly.
Further, the light rays are diverged in the divergence module and then have intersection points, and the intersection points are the intersection points of the light rays reflected for the first time in the divergence module;
the protruding surface has a distance from the intersection point.
Further, the detection assembly comprises a carbon dioxide sensor arranged on one side of the middle module, and the focusing surface is arranged on one side, far away from the middle module, of the carbon dioxide sensor;
in the height direction of the detection mechanism, the focusing surface is obliquely arranged from top to bottom from one side close to the carbon dioxide sensor to one side far away from the carbon dioxide sensor.
Further, the detection assembly further comprises a reflecting piece arranged on one side, away from the middle module, of the carbon dioxide sensor, and the surface, facing the carbon dioxide sensor, of the reflecting piece serves as the focusing surface.
Further, the divergence module is provided with a plurality of divergence surfaces, and the curvatures of the divergence surfaces are different.
Further, the middle module is provided with a plurality of middle surfaces, the curvatures of the middle surfaces are different, and the curvature of at least part of the middle surfaces is larger than that of the divergent surfaces.
Further, the separator has a straight portion disposed toward the middle module, and at least a portion of the straight portion is configured to reflect the light reflected by the middle surface onto the focusing surface.
Further, the divider also has a curved portion disposed toward the diverging module, the curved portion having a curvature approximating at least a portion of the diverging face curvature.
A PPM concentration sensor for detecting the concentration of carbon dioxide in air, comprising:
a plug-in mechanism;
the detection mechanism is plugged with the plugging module;
furthermore, the PPM concentration sensor is also provided with a ventilation piece, and the ventilation piece is used for communicating air inside and outside the reflection cavity;
the ventilation piece is a filter screen.
Compared with the prior art, the method has the following beneficial effects: this application has prolonged the transmission distance of light in the reflection cavity through being provided with reflection assembly and separator, has increased the absorption time of carbon dioxide to the infrared light of specific wavelength, and then makes carbon dioxide sensor's testing result more accurate.
[ description of the drawings ]
FIG. 1 is a schematic structural view of a detecting mechanism shown in the present embodiment;
FIG. 2 is another schematic view of the detecting mechanism of the present embodiment;
FIG. 3 is a schematic structural diagram of the PPM concentration sensor shown in this embodiment;
fig. 4 is another view of the PPM concentration sensor shown in this embodiment.
[ detailed description ] embodiments
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "comprising" and "having," as well as any variations thereof, in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1 to 2, a detecting mechanism 1 according to an embodiment of the present application is used for detecting a carbon dioxide concentration in air. Specifically, the detection mechanism 1 includes a light source 13, a detection component 14 and a reflection component 12, and the reflection component 12 is respectively connected to the light source 13 and the detection component 14, so that light emitted by the light source 13 is reflected by the reflection component 12 and then received by the detection component 14 to measure the concentration of carbon dioxide. The reflection assembly 12 has a reflection cavity 11, and light emitted from the light source 13 enters the reflection cavity 11 and is reflected by the detection assembly 14. The specific wavelength of the light 16 is absorbed by the carbon dioxide in the air, so that the wavelength received by the detection component 14 changes, thereby detecting the concentration of the carbon dioxide in the air.
Wherein, the light source 13 and the detection component 14 are arranged on the same side, and the purpose of arranging the light source 13 and the detection component 14 on the same side is as follows: so that the light 16 emitted from the light source 13 can pass through the reflective cavity 11 filled with air, thereby improving the accuracy of the detection result of carbon dioxide in air. And, in order to prevent the light 16 of the light source 13 from being directly received by the detection assembly 14, a partition 15 is further provided in the reflective cavity 11, the partition 15 being provided between the light source 13 and the detection assembly 14 to partition the light source 13 and the detection assembly 14, thereby ensuring the accuracy of the detection result herein.
In this embodiment, the light source 13 is a tungsten lamp, and in other embodiments, the light source 13 may be selected according to actual situations, such as an infrared light emitting diode, as long as the detection requirement can be met, and is not limited herein.
As described above, in order to improve the accuracy of the detection result, the light 16 needs to be reflected entirely within the reflective cavity 11 to contact with the carbon dioxide in the air inside the reflective cavity 11 entirely. Therefore, the reflection assembly 12 includes a diverging module for diverging the light 16 emitted from the light source 13 and an intermediate module for reflecting the light 16 to the detection assembly 14. The divergent module is used to totally diverge and reflect the light 16 in the reflective cavity 11, and the middle module can reflect the divergently reflected light 16 to the detection assembly 14.
Specifically, the divergent module is provided with a plurality of divergent surfaces, and the divergent surfaces are used for divergently reflecting most of the light 16 emitted by the light source 13 to the middle module, so that the light 16 is fully utilized, and the utilization rate of the light 16 is improved. In the present embodiment, the majority is defined as: the light 16 divergently reflected to the middle module accounts for more than 95% of the total light received by the divergent module, and the rest of the light 16 directly enters the middle module.
The diverging module has a first inner wall 121, and the first inner wall 121 serves as a diverging surface of the diverging module. In other embodiments, the diverging surface may also be used as a separate module, and fixed by bonding, welding, or the like with the first inner wall 121, which is not specifically limited herein and is determined according to the actual situation.
In order to further improve the utilization rate of the light 16, in the embodiment, the curvature of the plurality of divergent surfaces is different, wherein the curvature of the divergent surface near the light source 13 approaches an ellipse or an ellipse, and a part of the light 16 emitted by the light source 13 is diverged to the divergent surface far away from the light source 13 through the divergent surface. In this embodiment, the curvature of the divergent surface near the light source 13 is an ellipse, the elliptical divergent surface can make the light 16 emitted by the light source 13 reflected to the divergent surface far away from the light source 13 after reaching the divergent surface, and the elliptical divergent surface can make the light 16 emitted by the light source 13 diverged without being gathered at a certain position, thereby improving the accuracy of the detection result.
The curvature of the diverging surface remote from the light source 13 is less than the curvature of the diverging surface near the light source 13 to reflect the light rays 16 reflected from the diverging surface near the light source 13 to the intermediate module.
And, in order to further enhance the effect of the divergent module reflection divergence. The diverging module has at least one protruding surface 1211 on the opposite side to the light source 13, and since the curvature of the diverging surface near the light source 13 is elliptical, the reflected light 16 diverged by the elliptical diverging surface near the light source 13 converges to an intersection point on the side of the diverging module away from the light source, and the protruding surface 1211 has a certain distance from the intersection point of the reflected light 16 diverged by the elliptical diverging surface near the light source 13, so as to prevent the total reflected light 16 diverged by the elliptical diverging surface from converging to a point on the diverging module, which affects the diverging effect of the light 16 in the diverging module. After the protruding surface 1211 is disposed, the reflected light 16 diverged by the elliptical diverging surface will diverge and extend a distance after crossing the intersection point, so that the light 16 is diffused, and the contact effect of the light 16 with the carbon dioxide in the reflective cavity 11 is enhanced.
The intermediate module is provided with a plurality of intermediate surfaces for reflecting the light rays 16 reflected from the diverging surfaces. In this embodiment, the intermediate module has a second inner wall 122 connected to the first inner wall 121. Wherein the second inner wall 122 serves as a middle surface of the middle module. In other embodiments, the intermediate surface may also exist independently and be consistent with the diverging surface, which is not described herein. The intermediate surface has a curvature less than the curvature of the diverging surface for reflecting light rays 16 divergently reflected by the diverging surface.
The spacer 15 has a curved portion 151 contacting the first inner wall 121 and a linear portion 152 contacting the curved portion 151 and the second inner wall 123, respectively, and the light 16 passing through the intermediate surface is reflected to the linear portion 152. The curvature of the curved portion 151 is close to the curvature of a diverging surface provided near the light source 13, and diverges the light 16 emitted from the light source 13 together with the diverging surface. The linear portion 152 is used to reflect the light 16 reflected by the second inner wall 122 as the middle surface to the detecting component 14, so as to complete the process of transmitting the light 16 emitted by the light source 13 to the detecting component 14. Through the arrangement, in a certain space, the distance of the light 16 to the detection assembly 14 is greatly prolonged, the contact time of the light 16 and carbon dioxide in an environment to be detected is prolonged, and the detection accuracy of the detection assembly 14 is improved.
The detection unit 14 includes a carbon dioxide sensor 141 provided on the side of the middle block, and a focusing surface provided on the side of the carbon dioxide sensor 141 remote from the middle block. The focusing surface is used to intensively reflect the light 16 reflected by the middle module into the carbon dioxide sensor 141. In the present embodiment, the intermediate module is further provided with a third inner wall 123 between the second inner wall 122 and the straight line portion 152, the third inner wall 123 is inclined from the side close to the carbon dioxide sensor 141 to the side far from the carbon dioxide sensor 141 from the top in the height direction of the detection mechanism 1, and the surface of the third inner wall 123 facing the carbon dioxide sensor 141 is used as a focusing surface.
In another embodiment, the arrangement of the focusing surface may also be selected according to actual situations, for example, a reflecting element is separately disposed on a side of the carbon dioxide sensor 141 away from the middle module, and a surface of the reflecting element facing the carbon dioxide sensor 141 is used as the focusing surface, as long as the reflecting requirement is met, which is not specifically limited herein.
The reflecting cavity 11 is further provided with a ventilation piece 111, the ventilation piece 111 is located at the top of the reflecting cavity 11 and used for communicating the reflecting cavity 11 with outside air, so that the environment states inside and outside the reflecting cavity 11 are kept consistent, and the accuracy of carbon dioxide concentration detection is further ensured.
In this embodiment, the ventilation member 111 is a filter screen, and can be used to filter large dust particles in the air, and is detachably connected to the reflective chamber 11, so as to facilitate replacement and cleaning. In other embodiments, the type of the ventilation member 111, such as a grid, may be selected according to actual situations, and is not limited in detail.
Referring to fig. 3 to 4, a PPM concentration sensor for detecting the concentration of carbon dioxide in air includes an inserting mechanism 2 and the detecting mechanism 1 connected to the inserting mechanism 2.
The plugging mechanism 2 includes a bottom plate 21 disposed under the reflective cavity 11, and a plurality of pins 22 disposed on two sides of the bottom plate 21.
Specifically, the pins 22 include a plurality of second insertion holes 221 disposed on two sides of the bottom plate 21, and insertion pieces 222 at least partially installed in the second insertion holes 221, so that the PPM concentration sensor is connected to other devices by inserting or welding the insertion pieces 222 protruding out of the second insertion holes 221 onto other devices.
In this embodiment, the connection mode of the plugging mechanism 2 and the detection mechanism 1 is plugging, the four corners of the plugging mechanism 2 and the detection mechanism 1 have corresponding plug connectors 211 and first plugging holes 212, and the plugging mechanism 2 and the detection mechanism 1 are fixedly plugged through the plugging cooperation of the plug connectors 211 and the first plugging holes 212. In other embodiments, a corresponding connection mode may also be selected according to actual situations, for example, the detection mechanism 1 and the plugging mechanism 2 are connected by a clamping member, and the like, which is not specifically limited herein.
The light source 13 and the carbon dioxide sensor 141 of the detecting mechanism 1 each have a pin 131, the bottom plate 21 has a corresponding mounting hole 213 at a position corresponding to the pin 131, and the pins 131 of the light source 13 and the carbon dioxide sensor 141 protrude out of the bottom plate 21 through the mounting holes 213 and are connected with other components, so as to connect the light source 13 and the carbon dioxide sensor 141 with external components.
In this embodiment, the PPM concentration sensor is further provided with a calibration hole 214, the calibration hole 214 penetrates through the bottom plate 21 and is communicated with the reflection cavity 11, carbon dioxide with a rated concentration can be injected into the reflection cavity 11 through the calibration hole 214 for detection, and the carbon dioxide sensor 141 is calibrated according to a comparison result between the carbon dioxide concentration and the rated concentration.
In summary, the following steps: this application has prolonged the transmission distance of light in the reflection cavity through being provided with reflection assembly and separator, has increased the absorption time of carbon dioxide to the infrared light of specific wavelength, and then makes carbon dioxide sensor's testing result more accurate.
The above is only one specific embodiment of the present application, and any other modifications based on the concept of the present application are considered as the protection scope of the present application.
Claims (10)
1. A detection mechanism for detecting a carbon dioxide concentration in air, comprising:
a light source;
the detection assembly is positioned on the same side with the light source;
the reflection assembly is provided with a reflection cavity and is used for reflecting the light rays emitted by the light source to the detection assembly; and
a separator disposed within the reflective cavity to separate the light source and the detection assembly;
the reflecting assembly comprises a diverging module and an intermediate module, wherein the diverging module is used for diverging the light rays, and the intermediate module is used for reflecting the light rays in the diverging module; the light source is arranged on one side of the divergence module, the divergence module is provided with a protruding surface on the opposite side of the light source, and the light rays are reflected to the middle module after being diverged again on the protruding surface;
the detection assembly is provided with a focus surface, and the focus surface is arranged on one side of the middle module so as to reflect light rays passing through the middle module into the detection assembly.
2. The sensing mechanism of claim 1, wherein said light rays diverge within said diverging module to have an intersection point, said intersection point being the intersection point of the light rays after an initial reflection within said diverging module;
the protruding surface has a distance from the intersection point.
3. The sensing mechanism of claim 1, wherein the sensing assembly includes a carbon dioxide sensor disposed on a side of the intermediate module, the focal plane being disposed on a side of the carbon dioxide sensor remote from the intermediate module;
in the height direction of the detection mechanism, the focusing surface is obliquely arranged from top to bottom from one side close to the carbon dioxide sensor to one side far away from the carbon dioxide sensor.
4. The sensing mechanism of claim 1, wherein the sensing assembly further comprises a reflector disposed on a side of the carbon dioxide sensor remote from the intermediate module, a face of the reflector facing the carbon dioxide sensor serving as the focal plane.
5. The sensing mechanism of claim 1, wherein the diverging module is provided with a plurality of diverging surfaces, the plurality of diverging surfaces having different curvatures.
6. The sensing mechanism of claim 5, wherein the intermediate module is provided with a plurality of intermediate surfaces, the intermediate surfaces having different curvatures, and at least some of the intermediate surfaces having curvatures greater than the curvature of the diverging surfaces.
7. The sensing mechanism of claim 6, wherein the spacer has a linear portion disposed toward the intermediate module, at least a portion of the linear portion being configured to reflect light reflected from the intermediate surface onto the focal plane.
8. The detection mechanism of claim 5, wherein the divider further has a curved portion disposed toward the diverging module, the curved portion having a curvature approximating at least a portion of the curvature of the diverging surface.
9. A PPM concentration sensor for detecting the concentration of carbon dioxide in air, comprising:
a plug-in mechanism;
the detection mechanism is inserted with the insertion mechanism;
wherein the detection mechanism is as claimed in any one of claims 1 to 8.
10. The PPM concentration sensor of claim 9 further provided with a vent to communicate air inside and outside the reflective cavity;
the ventilation piece is a filter screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122737607.6U CN216208547U (en) | 2021-11-09 | 2021-11-09 | Detection mechanism and PPM concentration sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122737607.6U CN216208547U (en) | 2021-11-09 | 2021-11-09 | Detection mechanism and PPM concentration sensor |
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| Publication Number | Publication Date |
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| CN216208547U true CN216208547U (en) | 2022-04-05 |
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| CN202122737607.6U Active CN216208547U (en) | 2021-11-09 | 2021-11-09 | Detection mechanism and PPM concentration sensor |
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