CN218995138U - Non-spectroscopic infrared gas sensor - Google Patents
Non-spectroscopic infrared gas sensor Download PDFInfo
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- CN218995138U CN218995138U CN202223051700.2U CN202223051700U CN218995138U CN 218995138 U CN218995138 U CN 218995138U CN 202223051700 U CN202223051700 U CN 202223051700U CN 218995138 U CN218995138 U CN 218995138U
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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
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Abstract
The utility model relates to the technical field of gas detection, and provides a non-spectroscopic infrared gas sensor, which comprises: the infrared light source, light filter, air chamber, detector, first support and second support, the infrared light source the light filter the air chamber with the detector coaxial line is arranged in proper order, first support cover is established the infrared light source the light filter and the outside of the first end of air chamber, first support is equipped with the air inlet, the second support cover is established the second end of air chamber and the outside of detector, the second support is equipped with the gas outlet, the air inlet with the gas outlet all with the air chamber intercommunication, wherein, the air chamber is flexible pipe. According to the non-spectroscopic infrared gas sensor provided by the utility model, the air chamber is arranged as the telescopic pipe, so that the optical path between the infrared light source and the detector has various lengths, various resolutions can be provided, and the detection precision of the non-spectroscopic infrared gas sensor is improved.
Description
Technical Field
The utility model relates to the technical field of gas detection, in particular to a non-spectroscopic infrared gas sensor.
Background
The continuous rising of the concentration of carbon dioxide gas brings about the problems of global warming, rising of sea level and the like, the carbon neutralization and the carbon reaching peak are highly concerned by countries in the world, and the carbon dioxide content in the atmosphere is reduced by means of reducing carbon emission, treating pollution and the like in the world.
At present, the optical path length between the light source and the detector in the gas sensor is a fixed value, only one resolution can be provided, and the problem of low detection precision caused by low resolution can occur.
Disclosure of Invention
The utility model provides a non-spectroscopic infrared gas sensor which is used for solving the defect that the gas sensor in the prior art can only provide one resolution, so that the detection precision is low.
The utility model provides a non-spectroscopic infrared gas sensor, comprising: the infrared light source, light filter, air chamber, detector, first support and second support, the infrared light source the light filter the air chamber with the detector coaxial line is arranged in proper order, first support cover is established the infrared light source the light filter and the outside of the first end of air chamber, first support is equipped with the air inlet, the second support cover is established the second end of air chamber and the outside of detector, the second support is equipped with the gas outlet, the air inlet with the gas outlet all with the air chamber intercommunication, wherein, the air chamber is flexible pipe.
According to the non-spectroscopic infrared gas sensor provided by the utility model, the non-spectroscopic infrared gas sensor further comprises a pair of sealing rings, wherein the two sealing rings are respectively arranged between the optical filter and the first end of the gas chamber and between the second end of the gas chamber and the detector.
According to the non-spectroscopic infrared gas sensor provided by the utility model, the non-spectroscopic infrared gas sensor further comprises a pair of plugs, the two plugs are respectively sleeved outside the gas chamber, and the first end of each plug is inserted into the first support or the second support to prevent gas leakage at the communication position of the gas chamber and the gas inlet and the communication position of the gas chamber and the gas outlet.
According to the non-spectroscopic infrared gas sensor provided by the utility model, the surface of the first end of each plug is provided with the zigzag structure, and the zigzag structure is abutted with the inner wall of the first support or the second support.
According to the non-spectroscopic infrared gas sensor provided by the utility model, the inner wall of the gas chamber is provided with a plating layer.
According to the non-spectroscopic infrared gas sensor provided by the utility model, the wavelength of the infrared light source is 3-5 mu m.
According to the non-spectroscopic infrared gas sensor provided by the utility model, the non-spectroscopic infrared gas sensor further comprises a pump and an air inlet pipe, wherein the air inlet pipe is connected with the air inlet, the pump is arranged in the air inlet pipe, and the pump is used for pumping gas into the air chamber.
The non-spectroscopic infrared gas sensor provided by the utility model further comprises a microcontroller, wherein the microcontroller is electrically connected with the detector.
According to the non-spectroscopic infrared gas sensor provided by the utility model, the non-spectroscopic infrared gas sensor further comprises a shell, wherein the shell is sleeved outside the air chamber, the first end of the shell is fixedly connected with the first support, and the second end of the shell is slidably connected with the second support.
According to the non-spectroscopic infrared gas sensor provided by the utility model, the total length of the telescopic tube is smaller than the length of the shell.
According to the non-spectroscopic infrared gas sensor provided by the utility model, the air chamber is arranged as the telescopic pipe, so that the optical path between the infrared light source and the detector has various lengths, various resolutions can be provided, and the detection precision of the non-spectroscopic infrared gas sensor is improved.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a non-spectroscopic infrared gas sensor according to the present utility model;
reference numerals:
10: an infrared light source; 20: a light filter; 30: a gas chamber; 40: a detector; 50: a seal ring; 60: a plug; 110: a first support; 111: an air inlet; 120: a second support; 121: and an air outlet.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The features of the utility model "first", "second" and the like in the description and in the claims may be used for the explicit or implicit inclusion of one or more such features. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
The non-spectroscopic infrared gas sensor of the present utility model is described below in connection with fig. 1.
As shown in fig. 1, in an embodiment of the present utility model, a non-spectroscopic infrared gas sensor includes: an infrared light source 10, a filter 20, a gas cell 30, a detector 40, a first support 110, and a second support 120. The infrared light source 10, the optical filter 20, the air chamber 30 and the detector 40 are coaxially and sequentially arranged, the first support 110 is sleeved outside the first ends of the infrared light source 10, the optical filter 20 and the air chamber 30, the first support 110 is provided with an air inlet 111, the second support 120 is sleeved outside the second ends of the air chamber 30 and the detector 40, the second support 120 is provided with an air outlet 121, the air inlet 111 and the air outlet 121 are both communicated with the air chamber 30, and the air chamber 30 is a telescopic pipe.
Specifically, the infrared light source 10, the optical filter 20, the air chamber 30 and the detector 40 are coaxially and sequentially arranged, the first support 110 and the second support 120 are hollow members, the first support 110 is provided with an air inlet 111, air enters the air chamber 30 from the air inlet 111, the infrared light source 10 is used for emitting infrared light, and the optical filter 20 is used for filtering impurity light in the infrared light, so that the light received by the detector 40 is basically infrared light. When the gas is irradiated by infrared light, the radiation intensity of the infrared light source 10 at the gas absorption wavelength is severely attenuated, the attenuation is related to the concentration of the detected gas and the path length of the light source, and the attenuation of the radiation intensity of the light source is calculated, so that the concentration of the detected gas can be obtained.
Gas detection sensor based on infrared absorption principle, wherein the radiation intensity of a light source of the gas detection sensor decays exponentially, and the process accords with lambert-beer law
I＝I 0 e (-kcL) ，
Wherein I is 0 Is the intensity of incident light; i is the intensity of received light; k is the absorption coefficient of the gas to be detected to infrared light, and each gas has a specific infrared absorption coefficient; c is the concentration of the gas to be detected; above is the equivalent light between the infrared light source 10 and the detector 40The path length, e, is the base of the natural logarithm.
In theory, the length of the air chamber 30 is positively correlated with the change of the received light intensity, and the longer the length of the air chamber 30, the larger the change of the received light intensity, and the higher the detection sensitivity of the non-spectroscopic infrared gas sensor, based on this, in the embodiment of the present utility model, the air chamber 30 adopts the telescopic tube, and can have various lengths when it is extended, so that the optical path between the infrared light source 10 and the detector 40 has various lengths, and thus can provide various resolutions, so as to improve the detection accuracy.
Further, in order to ensure the air tightness of the bellows, a sealing ring may be provided at the joint of the two sections of the bellows when the bellows is extended, so as to enhance the sealing property of the air chamber 30.
It will be appreciated that: the non-spectroscopic infrared gas sensor provided by the embodiment of the utility model is suitable for detecting various gas concentrations, and is not limited to carbon dioxide gas.
According to the non-spectroscopic infrared gas sensor provided by the utility model, the air chamber is arranged as the telescopic pipe, so that the optical path between the infrared light source and the detector has various lengths, various resolutions can be provided, and the detection precision of the non-spectroscopic infrared gas sensor is improved.
As shown in fig. 1, in the embodiment of the present utility model, the non-spectroscopic infrared gas sensor further includes a pair of sealing rings 50, and the two sealing rings 50 are respectively disposed between the optical filter 20 and the first end of the gas cell 30, and between the second end of the gas cell 30 and the detector 40.
Specifically, the sealing ring 50 is provided between the first end of the gas cell 30 and the optical filter 20, and between the second end of the gas cell 30 and the detector 40, so that gas leakage from both ends of the gas cell 30 can be prevented.
As shown in fig. 1, in the embodiment of the present utility model, the non-spectroscopic infrared gas sensor further includes a pair of plugs 60, and the two plugs 60 are respectively sleeved outside the gas chamber 30, and a first end of each plug 60 is inserted into the first support 110 or the second support 120 to prevent gas leakage in the gas chamber 30.
Specifically, in this embodiment, the outer diameter of the first end of each plug 60 is smaller than the outer diameter of the second end, the plug 60 has an inner hole, the plug 60 is sleeved outside the air chamber 30, the first end of one plug 60 is inserted into the first support 110, the first end of the other plug 60 is inserted into the second support 120, the surface of the first end of each plug 60 is provided with a zigzag structure, which abuts against the inner wall of the first support 110 or the second support 120 to prevent the air chamber 30 from leaking air at the connection position between the air chamber 30 and the air inlet 111 and the connection position between the air chamber 30 and the air outlet 121, and optionally, in this embodiment, the first end of the plug 60 is made of a flexible material, such as rubber.
Further, in the embodiment of the present utility model, the inner wall of the air chamber 30 is provided with a plating layer, specifically, in the embodiment, the air chamber 30 is a stainless steel tube, and the inner surface of the air chamber is provided with a plating layer, and the plating layer may be a material with high reflection coefficient for infrared light, strong oxidation resistance and good stability, such as gold or silver.
Further, in the embodiment of the present utility model, the infrared light source 10 is TR715, the infrared light source 10 is provided with an aluminum parabolic emission cup, and the wavelength of the infrared light source 10 is 3 μm to 5 μm.
In an embodiment of the present utility model, the non-spectroscopic infrared gas sensor further comprises a pump and an air inlet pipe, the air inlet pipe being connected to the air inlet 111, the pump being arranged in the air inlet pipe, the pump being arranged to pump the gas into the gas chamber 30. Alternatively, in this embodiment, the pump is a peristaltic pump.
Further, in the embodiment of the present utility model, the detector 40 is provided with a digital-to-Analog conversion (ADC) module for converting an infrared light Analog signal into a digital signal, and optionally, in the embodiment of the present utility model, the digital-to-Analog conversion module adopts a digital-to-Analog conversion chip with 16 bits and more, and may specifically be an ADS1120IPWR, so as to meet the test accuracy.
In an embodiment of the present utility model, the non-spectroscopic infrared gas sensor further includes a housing, the housing is sleeved outside the gas chamber 30, a first end of the housing is fixedly connected with the first support 110, and a second end of the housing is slidably connected with the second support 120.
Specifically, the inner wall of the second end of the housing is provided with a sliding block, the surface of the second support 120 is provided with a sliding groove, and the sliding block is embedded in the sliding groove and can move along the sliding groove. Alternatively, in this embodiment, the bellows may be two sections to provide two resolutions. When the first section of the telescopic tube is contracted into the second section of the tube, the second support 120 is entirely located in the housing; when the first section of the telescopic tube is fully extended out of the second section of the tube, the second support 120 slides relative to the housing, with a portion of the second support 120 being located within the housing. It will be appreciated that: in this embodiment, when the lengths of the first joint pipe extending out of the second joint pipe are different, the optical paths between the infrared light source 10 and the detector 40 are different, so that various resolutions can be provided.
Further, in an embodiment of the present utility model, the total length of the bellows is less than the length of the housing so that both ends of the air chamber 30 are always located within the housing.
Further, in an embodiment of the present utility model, the non-spectroscopic infrared gas sensor further comprises a microcontroller disposed within the housing and electrically connected to the detector 40.
Specifically, the digital-to-analog conversion module converts the infrared light analog signal into a digital signal and sends the digital signal to the microcontroller, and the microcontroller processes the data and calculates the gas concentration.
Further, in an embodiment of the present utility model, the non-spectroscopic infrared gas sensor further includes a data storage module, and the data storage module is electrically connected to the microcontroller.
Specifically, the data storage module is arranged in the shell, and the microcontroller sends the calculated gas concentration data to the data storage module for storage. Optionally, the data storage module adopts EEPROM, and reserves bluetooth module and can transmit data wireless to PC end or mobile end.
Further, in an embodiment of the present utility model, the non-spectroscopic infrared gas sensor further comprises a power module for powering the microcontroller. Further, the non-spectroscopic infrared gas sensor also comprises a display screen, wherein the display screen is arranged on the shell, the display screen adopts a 3.5 inch LCD capacitive touch screen, and the display screen can be used for man-machine interaction.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. A non-spectroscopic infrared gas sensor comprising: the infrared light source, light filter, air chamber, detector, first support and second support, the infrared light source the light filter the air chamber with the detector coaxial line is arranged in proper order, first support cover is established the infrared light source the light filter and the outside of the first end of air chamber, first support is equipped with the air inlet, the second support cover is established the second end of air chamber and the outside of detector, the second support is equipped with the gas outlet, the air inlet with the gas outlet all with the air chamber intercommunication, wherein, the air chamber is flexible pipe.
2. The non-spectroscopic infrared gas sensor of claim 1, further comprising a pair of sealing rings, two of the sealing rings being disposed between the optical filter and the first end of the gas cell and between the second end of the gas cell and the detector, respectively.
3. The non-spectroscopic infrared gas sensor according to claim 1, further comprising a pair of plugs, two of which are respectively sleeved outside the gas chamber, a first end of each plug being inserted into the first support or the second support to prevent leakage of gas from a communication portion between the gas chamber and the gas inlet and a communication portion between the gas chamber and the gas outlet.
4. A non-spectroscopic infrared gas sensor according to claim 3, wherein the surface of the first end of each plug is provided with a saw-tooth structure which abuts the inner wall of the first or second support.
5. The non-spectroscopic infrared gas sensor according to claim 1, wherein the inner wall of the gas chamber is provided with a plating layer.
6. The non-spectroscopic infrared gas sensor according to claim 1, wherein the wavelength of the infrared light source is 3 to 5 μm.
7. The non-spectroscopic infrared gas sensor according to claim 1, further comprising a pump and an air inlet pipe, the air inlet pipe being connected to the air inlet, the pump being provided in the air inlet pipe, the pump being for pumping gas into the air chamber.
8. The non-spectroscopic infrared gas sensor of claim 1, further comprising a microcontroller electrically connected to the detector.
9. The non-spectroscopic infrared gas sensor according to claim 1, further comprising a housing, wherein the housing is sleeved outside the gas chamber, wherein a first end of the housing is fixedly connected to the first support, and wherein a second end of the housing is slidably connected to the second support.
10. The non-spectroscopic infrared gas sensor according to claim 9, wherein the total length of the telescoping tube is less than the length of the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223051700.2U CN218995138U (en) | 2022-11-16 | 2022-11-16 | Non-spectroscopic infrared gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223051700.2U CN218995138U (en) | 2022-11-16 | 2022-11-16 | Non-spectroscopic infrared gas sensor |
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| Publication Number | Publication Date |
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| CN218995138U true CN218995138U (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223051700.2U Active CN218995138U (en) | 2022-11-16 | 2022-11-16 | Non-spectroscopic infrared gas sensor |
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