CN219552250U - Self-adaptive air chamber probe and system for gas detection based on mid-infrared light - Google Patents
Self-adaptive air chamber probe and system for gas detection based on mid-infrared light Download PDFInfo
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- CN219552250U CN219552250U CN202223408428.9U CN202223408428U CN219552250U CN 219552250 U CN219552250 U CN 219552250U CN 202223408428 U CN202223408428 U CN 202223408428U CN 219552250 U CN219552250 U CN 219552250U
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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
Abstract
The utility model discloses a self-adaptive air chamber probe and a system for gas detection based on mid-infrared light, relates to the technical field of gas detection, and solves the technical problems that an existing gas detection device is inconvenient to adjust the optical path, low in detection precision, inflexible in gas detection and limited in application range. The air chamber probe comprises an optical fiber, a lens, a reflecting mirror and an adjusting structure; the optical fiber is fixedly connected with the lens; the reflecting mirror is adjacent to the lens and is correspondingly arranged; the reflector is arranged on the adjusting structure, and can move through the adjusting structure, and the distance between the reflector and the lens can be automatically adjusted. According to the utility model, the reflecting mirror is arranged on the adjusting structure, the distance between the reflecting mirror and the lens is adjusted through the adjusting structure, the optical path of the air chamber probe is changed, the optical path is adapted to the detection environment, the optical signal spectrum characteristic of the air chamber probe after the air chamber probe detects the absorbed light is ensured to be obvious, the accuracy of the air detection is improved, and the application range of the air chamber probe is improved through adjusting the optical path.
Description
Technical Field
The utility model relates to the technical field of gas detection, in particular to a self-adaptive gas chamber probe and system for gas detection based on mid-infrared light.
Background
Infrared spectroscopic analysis techniques are widely used for the analysis of various species, with particular advantages. The spectrum is similar to the fingerprint of human body, and has obvious fingerprint area absorption peak with the absorption peak position corresponding to the vibration frequency between the atomic bonds of the constituent matters. Since each species is a unique combination of atomic bonds, no two compounds have exactly the same infrared spectrum. Thus, infrared spectroscopic analysis techniques can identify various substances (qualitative analysis), whereas the peak value in the spectrum is a direct representation of the amount of the substance (quantitative analysis).
Common molecular spectroscopic analysis techniques are based on fourier transform principles, commonly known as FTIR principles. The broad spectrum light source irradiates the detected substance, after the substance is subjected to spectral absorption, the spectral signal is collected by the rear end detector, and the substance after spectral absorption is identified by a Fourier principle algorithm, so that the substance concentration can be displayed qualitatively and quantitatively.
The common gas spectrum analysis is based on the near infrared range, but the basic vibration absorption wave band with the strongest atoms mainly exists in the middle infrared spectrum region named as a fingerprint wave band, the near infrared spectrum technology mainly analyzes the weak overtone region of the intrinsic wave band, the spectrum absorption characteristics of some low-concentration gases in the near infrared are weak, a longer optical path is needed for the gas spectrum analysis, but the long optical path inevitably leads to the weakening of a spectrum signal, the resolution ratio is lower, and therefore, a higher-precision detector is needed for identifying the spectrum signal. The optical path of the existing gas detection device is inconvenient to adjust, the detection precision is not high, meanwhile, the gas detection is not flexible enough, and the application range is limited.
In the process of implementing the present utility model, the inventor finds that at least the following problems exist in the prior art:
the optical path of the existing gas detection device is inconvenient to adjust, the detection precision is not high, meanwhile, the gas detection is not flexible enough, and the application range is limited.
Disclosure of Invention
The utility model aims to provide a self-adaptive air chamber probe and a system for detecting air based on mid-infrared light, which are used for solving the technical problems of inconvenient adjustment of the optical path of the existing air detection device, low detection precision, inflexibility in air detection and limited application range in the prior art. The preferred technical solutions of the technical solutions provided by the present utility model can produce a plurality of technical effects described below.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the self-adaptive air chamber probe for detecting the gas based on the mid-infrared light provided by the utility model can detect the light signal after the gas is absorbed, and comprises an optical fiber, a lens, a reflecting mirror and an adjusting structure; the optical fiber is fixedly connected with the lens; the reflecting mirror is adjacent to the lens and is correspondingly arranged; the reflector is arranged on the adjusting structure, and can move through the adjusting structure to automatically adjust the distance between the reflector and the lens.
Preferably, an optical path is formed between the lens and the reflecting mirror; the lens is a convex lens and can adjust the mid-infrared light transmitted by the optical fiber to be parallel light to irradiate the reflecting mirror; the focal point of the lens can be adjusted.
Preferably, the adjusting structure further comprises a driving structure, a supporting rod and a gear; the driving structure is arranged at the bottom of the reflecting mirror; the support rod is provided with threads which are matched with the gear; the support rod and the gear are movably connected.
Preferably, the driving structure and the supporting rod are fixedly connected and can drive the supporting rod to rotate; the supporting rod is meshed with the gear through the threads, and moves in a straight line in the gear, so that the reflecting mirror is driven to move.
Preferably, the support rod is of a hollow structure; the control cables of the drive structure can be arranged in the support rod.
Preferably, the optical fiber is of a Y-shaped structure and is made of silver halide; one end of the Y-shaped structure is connected with the light source output end and the detector end of the FTIR spectrometer, and the other end of the Y-shaped structure is connected with the lens through a connector.
The system for detecting the gas based on the mid-infrared light comprises the self-adaptive gas chamber probe for detecting the gas based on the mid-infrared light, an FTIR spectrometer and a closed space; the FTIR spectrometer is connected with the closed space through the air chamber probe; one end of the air chamber probe is fixedly connected with the FTIR spectrometer, and the other end of the air chamber probe is arranged in the closed space; the air chamber probe can transmit the mid-infrared light emitted by the FTIR spectrometer to the closed space.
Preferably, the closed space is filled with gas to be detected; the gas to be detected can absorb the optical signals transmitted by the gas chamber probe; the gas cell probe is capable of transmitting back to the FTIR spectrometer an optical signal absorbed by the gas to be detected.
Preferably, an infrared radiation light source, a detector and a communication module are arranged in the FTIR spectrometer; the infrared radiation light source can emit mid-infrared light; the detector can receive the light signal absorbed by the gas to be detected and process the signal; the detector and the communication module are connected.
Preferably, the method further comprises a processing device; the FTIR spectrometer is in communication connection with the processing device through the communication module; the processing equipment can receive the signals processed by the FTIR spectrometer (2) and identify the components and the concentrations of the gas to be detected through the processed signals.
By implementing one of the technical schemes, the utility model has the following advantages or beneficial effects:
according to the utility model, the reflecting mirror is arranged on the adjusting structure, the distance between the reflecting mirror and the lens is adjusted through the adjusting structure, the optical path of the air chamber probe is changed, the optical path is adapted to the detection environment, the optical signal spectrum characteristic of the air chamber probe after the air chamber probe detects the absorbed light is ensured to be obvious, the accuracy of the air detection is improved, and the application range of the air chamber probe is improved through adjusting the optical path.
Drawings
For a clearer description of the technical solutions of embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art, in which:
FIG. 1 is a schematic diagram of an embodiment of an adaptive gas cell probe for gas detection based on mid-infrared light of the present utility model;
FIG. 2 is a schematic diagram of a system for gas detection based on mid-infrared light according to an embodiment of the present utility model.
In the figure: 1. an air chamber probe; 11. an optical fiber; 12. a lens; 13. a reflecting mirror; 14. an adjustment structure; 141. a driving structure; 142. a support rod; 143. a gear; 144. a thread; 2. FTIR spectrometer; 21. an infrared radiation light source; 22. a detector; 23. a communication module; 3. a closed space; 4. a processing device.
Detailed Description
For a better understanding of the objects, technical solutions and advantages of the present utility model, reference should be made to the various exemplary embodiments described hereinafter with reference to the accompanying drawings, which form a part hereof, and in which are described various exemplary embodiments which may be employed in practicing the present utility model. The same reference numbers in different drawings identify the same or similar elements unless expressly stated otherwise. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. It is to be understood that they are merely examples of processes, methods, apparatuses, etc. that are consistent with certain aspects of the present disclosure as detailed in the appended claims, other embodiments may be utilized, or structural and functional modifications may be made to the embodiments set forth herein without departing from the scope and spirit of the present disclosure.
In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "transverse," and the like are used in an orientation or positional relationship based on that shown in the drawings, and are merely for convenience in describing the present utility model and to simplify the description, rather than to indicate or imply that the elements referred to must have a particular orientation, be constructed and operate in a particular orientation. The terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The term "plurality" means two or more. The terms "connected," "coupled" and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, communicatively connected, directly connected, indirectly connected via intermediaries, or may be in communication with each other between two elements or in an interaction relationship between the two elements. The term "and/or" includes any and all combinations of one or more of the associated listed items. 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 order to illustrate the technical solutions of the present utility model, the following description is made by specific embodiments, only the portions related to the embodiments of the present utility model are shown.
Embodiment one:
as shown in fig. 1, the utility model provides an adaptive air chamber probe 1 for detecting gas based on mid-infrared light, wherein the air chamber probe 1 can detect an optical signal after gas absorption, and the air chamber probe 1 comprises an optical fiber 11, a lens 12, a reflecting mirror 13 and an adjusting structure 14; the optical fiber 11 is fixedly connected with the lens 12; the reflecting mirror 13 is adjacent to the lens 12 and is correspondingly arranged; the mirror 13 is arranged on the adjustment structure 14, and is movable by the adjustment structure 14 to automatically adjust the distance to the lens 12. Specifically, the air chamber probe 1 is configured to transmit mid-infrared light into the enclosed space 3 (as described below), so that the gas to be detected in the enclosed space 3 absorbs the light signal, then the absorbed light signal is detected by the air chamber probe 1, and the absorbed light signal is transmitted out of the enclosed space 3, so that the absorbed light signal is conveniently obtained to perform analysis and identification on the gas component and concentration. The optical fiber 11 is used for transmitting mid-infrared light, the lens 12 is fixedly connected with the optical fiber 11, the lens 12 can disperse the mid-infrared light transmitted by the optical fiber 11 into the closed space 3 and irradiate the reflecting mirror 13, so that the gas to be detected between the lens 12 and the reflecting mirror 13 is convenient for absorbing light signals, the reflecting mirror 13 is used for transmitting the mid-infrared light irradiated by the lens 12 onto the reflecting mirror 13 back to the lens 12, and the light signals reflected by the reflecting mirror 13 are gathered together by the lens 12, so that the optical fiber 11 is convenient for transmission. The reflecting mirror 13 is adjacent to the lens 12 and is correspondingly arranged, so that the mid-infrared light emitted by the lens 12 can be ensured to be irradiated onto the reflecting mirror 13, and meanwhile, the reflecting mirror 13 can reflect the mid-infrared light back to the lens 12. After the mid-infrared light irradiates the airtight space 3 and is absorbed by the gas, the spectrum signal can have different wave band information, and the gas with different concentration and precision needs different optical paths when being detected, the reflector 13 is arranged on the adjusting structure 14, so that the adjusting structure 14 drives the reflector 13 to move, the distance between the reflector 13 and the lens 12 is adjusted, the optical path of the air chamber probe 1 is changed, the optical path of the air chamber probe 1 is adapted to the detection environment, the detected optical information is clear, and the detection precision of the gas is improved. The optical path of the air chamber probe 1 can be adjusted in a self-adaptive manner, so that the air chamber probe 1 can be suitable for detecting and analyzing various different gases, and the application range of the air chamber probe 1 is improved. According to the utility model, the reflecting mirror 13 is arranged on the adjusting structure 14, the distance between the reflecting mirror 13 and the lens 12 is adjusted through the adjusting structure 14, the optical path of the air chamber probe 1 is changed, the optical path is adapted to the detection environment, the optical signal spectrum characteristic of the air chamber probe 1 after the air chamber probe 1 detects the absorbed light is ensured to be obvious, the accuracy of the air detection is improved, and meanwhile, the application range of the air chamber probe 1 is improved through adjusting the optical path.
As an alternative embodiment, an optical path is formed between the lens 12 and the reflecting mirror 13; the lens 12 is a convex lens 12, and can adjust the mid-infrared light transmitted by the optical fiber 11 to be parallel light to irradiate the reflecting mirror 13; the focal point of the lens 12 can be adjusted. Specifically, an optical path is formed between the lens 12 and the reflecting mirror 13, and is a path travelled by the mid-infrared light between the lens 12 and the reflecting mirror 13. The lens 12 is a convex lens, and is capable of refracting light rays emitted from the focal point by the mid-infrared light transmitted from the optical fiber 11 to the lens 12 into parallel light and irradiating the parallel light onto the reflecting mirror 13, and is also capable of converging the parallel light reflected back from the reflecting mirror 13 at the focal point. The lens 12 is preferably an aspherical lens 12, with the focal point of the lens 12 being adjustable. The distance between the reflecting mirror 13 and the lens 12 is adjusted by moving the reflecting mirror 13, so that the length of the optical path is adjusted, the optical path is adapted to the detection environment, clear spectrum information can be obtained, and the gas detection precision is improved.
As an alternative embodiment, the adjustment structure 14 further comprises a drive structure 141, a strut 142 and a gear 143; the driving structure 141 is disposed at the bottom of the reflecting mirror 13; the supporting rod 142 is provided with threads 144, and the threads 144 are matched with the gear 143; the supporting rod 142 and the gear 143 are movably connected. Specifically, there are multiple gas components in the detection environment, the sensor is arranged on the air chamber probe 1, after detecting a component (such as carbon dioxide) of a certain gas in the detection environment, a proper optical path value can be obtained, then the position of the reflecting mirror 13 is adjusted through the adjusting structure 14, the optical path is further adjusted, the clear spectrum signal of a part of the gas in the gas environment is ensured, and the accuracy of detecting the gas component and the concentration can be improved. The driving structure 141 is disposed at the bottom of the reflecting mirror 13 and is fixedly connected with the reflecting mirror 13, so that the driving structure 141 can drive the reflecting mirror 13 to move when working. The thread 144 arranged outside the support rod 142 is matched with the gear 143, and the gear 143 can be movably sleeved on the support rod 142, so that the support rod 142 and the gear 143 can be meshed.
As an alternative embodiment, the driving structure 141 and the supporting rod 142 are fixedly connected, and can drive the supporting rod 142 to rotate, and the supporting rod 142 is meshed through the threads 144 and the gear 143 and moves linearly in the gear 143, so as to drive the reflecting mirror 13 to move. Specifically, after receiving the control instruction, the driving structure 141 at the bottom of the reflector 13 drives the supporting rod 142 to rotate, so that the threads 144 on the supporting rod 142 are meshed with the gear 143 fixed in the closed space 3, the gear 143 is an internal gear, and is sleeved on the supporting rod 142, thereby converting the rotation of the supporting rod 142 into linear motion, and the supporting rod 142 reciprocates in the gear to drive the reflector 13 to synchronously move, and further adjust the optical path; in addition, the reflecting mirror 13 may be fixedly connected to a gear 143 (or other structures with the same function, such as a nut, etc.), and the driving structure 141 drives the supporting rod 142 to rotate through the fixing supporting rod 142, and the gear 143 reciprocates on the supporting rod 142 to drive the reflecting mirror 13 to move, so as to adjust the optical path. The driving structure 141 and the supporting rod 142 are fixedly connected, so that the stability of the structure can be ensured.
As an alternative embodiment, the struts 142 are hollow structures; the control cables of the drive structure 141 can be routed within the struts 142. Specifically, the support rod 142 is of a hollow structure, so that the control cable of the driving structure 141 is conveniently arranged inside the support rod 142, and is conveniently led through the support rod 142, so that the structure is tidier and more attractive, and the control cable can be protected.
As an alternative embodiment, the optical fiber 11 has a Y-shaped structure and is made of silver halide; one end of the Y-shaped structure is connected with the light source output end of the FTIR spectrometer 2 and the detector 22 end, and the other end is connected with the lens 12 through a joint. Specifically, the optical fiber 11 is configured in a Y-type structure, so that the FTIR spectrometer 2 (described below) can transmit mid-infrared light and receive an optical signal absorbed by the gas to be detected, which makes the structure simple, the installation convenient, and the cost saving. The silver halide optical fiber is a middle infrared energy-transmitting optical fiber with excellent performance, has good transmittance and softness, can transmit a spectrum in a range of 3-18 microns, and can transmit middle infrared light in real time; the gas has stronger absorption characteristic in mid-infrared light, the wave band mainly exists on a fingerprint wave band in a mid-infrared spectrum region, has uniqueness, and can more accurately identify the gas components and concentration; the silver halide optical fiber can provide extremely low attenuation value when transmitting mid-infrared light, and ensures that optical signals are not easy to run off. One end of the optical fiber 11 with two connectors is respectively connected with the light source output end and the detector end of the FTIR spectrometer 2, and is respectively used for transmitting the mid-infrared light into the closed space 3 and receiving the light signal absorbed by the gas to be detected. One end of the optical fiber 11 with a connector is connected with the lens 12, so that the mid-infrared light is adjusted to be parallel light through the lens 12 and transmitted in the closed space 3, and the parallel light can be absorbed by the gas to be detected better. The joint connecting the optical fiber 11 and the lens 12 is preferably SMA905.
In addition, the air chamber probe 1 is suitable for high-temperature and high-pressure environments, and as the air chamber probe 1 adopts the mid-infrared silver halide optical fiber to transmit mid-infrared light in real time, the melting point of the mid-infrared silver halide optical fiber is more than four hundred degrees, and the conventional one hundred-degree environment can be normally used; meanwhile, the lens 12, the reflecting mirror 13 and other parts of the air chamber probe 1 adopt high-voltage devices, so that the air chamber probe 1 is not easy to damage under the high-voltage environment and the stability of detected gas is ensured.
Embodiment two:
as shown in fig. 2, a system for detecting gas based on mid-infrared light includes the self-adaptive gas chamber probe for detecting gas based on mid-infrared light in any one of the first embodiment, further includes an FTIR spectrometer 2 and a closed space 3; the FTIR spectrometer 2 is connected with the closed space 3 through the air chamber probe 1; one end of the air chamber probe 1 is fixedly connected with the FTIR spectrometer 2, and the other end of the air chamber probe is arranged in the closed space 3; the air chamber probe 1 is capable of transmitting mid-infrared light emitted by the FTIR spectrometer 2 to the enclosed space 3. Specifically, the FTIR spectrometer 2 is connected with the closed space 3 through the air chamber probe 1, so that mid-infrared light output by the FTIR spectrometer 2 is transmitted into the closed space 3 through the air chamber probe 1, the air chamber probe 1 absorbs light signals of the gas to be detected stored in the closed space 3, the light signals after being absorbed are transmitted back to the FTIR spectrometer 2, in the process of transmitting the light signals back to the FTIR spectrometer 2, the light signals can be absorbed again by the gas to be detected, the light signals are absorbed twice, the spectral signal characteristics of the low-concentration gas are ensured to be obvious, the more the gas absorption spectral signals are, the lower concentration value of the gas can be detected, the air chamber probe 1 can adjust the optical path to adapt to the detection environment, and the accuracy of the detected gas is ensured. The utility model transmits the mid-infrared light emitted by the FTIR spectrometer 2 into the closed space 3 through the air chamber probe 1, so that the mid-infrared light is absorbed by the gas to be detected in the closed space 3, the FTIR spectrometer 2 receives the absorbed optical signal through the air chamber probe 1, processes the signal and sends the signal to the processing equipment 4, so that the processing equipment 4 analyzes the acquired data to identify the components and the concentration of the gas to be detected.
As an alternative embodiment, the closed space 3 is filled with the gas to be detected; the gas to be detected can absorb the optical signals transmitted by the gas chamber probe 1; the gas cell probe 1 is capable of transmitting back to the FTIR spectrometer 2 an optical signal that is absorbed by the gas to be detected. Specifically, the gas to be detected is filled in the closed space 3, and generally contains various gas components, the gas to be detected can absorb optical signals transmitted by the gas chamber probe 1, the optical signals after different gases are absorbed have different spectral characteristics, and the optical signals after being absorbed by the gas to be detected can be transmitted back to the FTIR spectrometer 2 through the gas chamber probe 1, so that the spectral data acquisition of the gas to be detected is realized.
As an alternative embodiment, an infrared radiation light source 21, a detector 22 and a communication module 23 are arranged inside the FTIR spectrometer 2; the infrared radiation light source 21 is capable of emitting mid-infrared light; the detector 22 is capable of receiving an optical signal absorbed by the gas to be detected and performing signal processing; the detector 22 and the communication module 23 are connected. Specifically, the infrared radiation light source emits mid-infrared light with a broad spectrum, the fingerprint wave band in the mid-infrared spectrum region is the basic vibration absorption wave band with the strongest atoms, the absorption characteristic of the spectrum can be enhanced by adopting the mid-infrared light, the spectrum is conveniently analyzed by the processing equipment 4, the components and the concentration of the gas to be detected are identified, and meanwhile, a long-optical-path air chamber is not required to be prepared. The detector is in communication connection with the communication module, and the detector is used for collecting the light signal absorbed by the gas to be detected, and performing signal processing (such as amplification processing) on the collected data, so that the processed signal can be transmitted to the communication module, and transmitted to the processing device 4 through the communication module.
As an alternative embodiment, further comprises a processing device 4; the FTIR spectrometer 2 is communicatively connected to the processing device 4 via a communication module 23; the processing device 4 can receive the signals processed by the FTIR spectrometer 2 and identify the components and the concentration of the gas to be detected through the processed signals. Specifically, the FTIR spectrometer 2 is in communication connection with the processing device 4 through the communication module, the FTIR spectrometer 2 can process the collected data and then transmit the processed data to the processing device 4, the processing device 4 can identify and analyze the collected data, and the components and the concentration of the gas to be detected are analyzed by comparing the collected spectrum signal with the spectrum in the database stored in advance in the processing device 4 and further having the band characteristics on the spectrum. The processing equipment 4 can also perform model establishment on the collected spectrum data, so that a control instruction can be directly sent out according to the existing gas data (data model) of the measuring environment when the gas is detected next time, the proper optical path is automatically adjusted by the gas chamber probe 1, and the sensitivity and the accuracy in gas identification and detection are improved.
The foregoing is only illustrative of the preferred embodiments of the utility model, and it will be appreciated by those skilled in the art that various changes in the features and embodiments may be made and equivalents may be substituted without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The self-adaptive air chamber probe for detecting the gas based on the mid-infrared light is characterized in that the air chamber probe (1) can detect the light signal after the gas is absorbed, and the air chamber probe (1) comprises an optical fiber (11), a lens (12), a reflecting mirror (13) and an adjusting structure (14); the optical fiber (11) is fixedly connected with the lens (12); the reflecting mirror (13) is adjacent to the lens (12) and is correspondingly arranged; the reflecting mirror (13) is arranged on the adjusting structure (14), and can move through the adjusting structure (14) to automatically adjust the distance between the reflecting mirror and the lens (12).
2. An adaptive gas cell probe for gas detection based on mid-infrared light according to claim 1, characterized in that an optical path is formed between the lens (12) and the mirror (13); the lens (12) is a convex lens (12) and can adjust the mid-infrared light transmitted by the optical fiber (11) to be parallel light to irradiate the reflecting mirror (13); the focal point of the lens (12) is adjustable.
3. An adaptive gas cell probe for gas detection based on mid-infrared light according to claim 1, characterized in that the adjustment structure (14) comprises a driving structure (141), a strut (142) and a gear (143); the driving structure (141) is arranged at the bottom of the reflecting mirror (13); threads (144) are arranged on the supporting rod (142), and the threads (144) are matched with the gear (143); the supporting rod (142) and the gear (143) are movably connected.
4. A self-adaptive air chamber probe for gas detection based on mid-infrared light according to claim 3, wherein the driving structure (141) and the supporting rod (142) are fixedly connected, and can drive the supporting rod (142) to rotate; the supporting rod (142) is meshed through the threads (144) and the gear (143), and moves in a straight line in the gear (143), so that the reflecting mirror (13) is driven to move.
5. A self-adaptive air chamber probe for gas detection based on mid-infrared light according to claim 3, characterized in that the strut (142) is of hollow structure; control cables of the drive structure (141) can be arranged within the strut (142).
6. The self-adaptive air chamber probe based on mid-infrared light for gas detection according to claim 1, wherein the optical fiber (11) has a Y-shaped structure and is made of silver halide; one end of the Y-shaped structure is connected with the light source output end and the detector end of the FTIR spectrometer (2), and the other end of the Y-shaped structure is connected with the lens (12) through a connector.
7. A system for gas detection based on mid-infrared light, comprising the self-adaptive gas chamber probe for gas detection based on mid-infrared light according to any one of claims 1-6, characterized by further comprising a FTIR spectrometer (2) and a closed space (3); the FTIR spectrometer (2) is connected with the closed space (3) through the air chamber probe (1); one end of the air chamber probe (1) is fixedly connected with the FTIR spectrometer (2), and the other end of the air chamber probe is arranged in the closed space (3); the air chamber probe (1) can transmit the mid-infrared light emitted by the FTIR spectrometer (2) to the closed space (3).
8. The system for detecting gas based on mid-infrared light according to claim 7, wherein the closed space (3) is filled with gas to be detected; the gas to be detected can absorb the optical signals transmitted by the gas chamber probe (1); the gas cell probe (1) is capable of transmitting back to the FTIR spectrometer (2) an optical signal absorbed by the gas to be detected.
9. A system for gas detection based on mid-infrared light according to claim 8, characterized in that an infrared radiation light source (21), a detector (22) and a communication module (23) are arranged in the FTIR spectrometer (2); the infrared radiation light source (21) is capable of emitting mid-infrared light; the detector (22) is capable of receiving and signal processing the light signal absorbed by the gas to be detected; the detector (22) and the communication module (23) are connected.
10. A system for gas detection based on mid-infrared light according to claim 9, further comprising a processing device (4); the FTIR spectrometer (2) is communicatively connected to the processing device (4) via the communication module (23); the processing equipment (4) can receive the signals processed by the FTIR spectrometer (2) and identify the components and the concentration of the gas to be detected through the processed signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202223408428.9U CN219552250U (en) | 2022-12-16 | 2022-12-16 | Self-adaptive air chamber probe and system for gas detection based on mid-infrared light |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223408428.9U CN219552250U (en) | 2022-12-16 | 2022-12-16 | Self-adaptive air chamber probe and system for gas detection based on mid-infrared light |
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| CN219552250U true CN219552250U (en) | 2023-08-18 |
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| CN202223408428.9U Active CN219552250U (en) | 2022-12-16 | 2022-12-16 | Self-adaptive air chamber probe and system for gas detection based on mid-infrared light |
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