A gas flux monitoring device and method based on Fourier transform infrared technology

Abstract

The present invention provides a gas flux monitoring device and method based on Fourier transform infrared technology, which relates to the field of optical detection technology. The monitoring device includes an interferometer, a gas cell device, and a detector. The gas cell device includes: a bracket; a gas cell, which is installed on the bracket, and both ends of the gas cell are provided with installation cavities; a mirror assembly, two mirror assemblies are respectively rotatably arranged in the installation cavities at both ends of the gas cell, and at least one side of the mirror assembly is provided with a mirror; and a cleaning assembly, which is installed on the bracket and is inserted into the installation cavity and located on one side of the mirror assembly. When the mirror to be cleaned rotates into the installation cavity corresponding to the cleaning assembly, the gas to be detected that has penetrated into the gas cell in the installation cavity is discharged back into the gas cell. The gas flux monitoring device and method provided by the present invention can effectively reduce the energy loss when infrared light is reflected in the optical path gas cell, so as to ensure the accuracy of the monitoring results.

Description

Technical Field

[0001] The present invention relates to the technical field of optical detection, and particularly to a gas flux monitoring device and method based on Fourier transform infrared technology. Background Art

[0002] Fourier transform infrared spectroscopy (FTIR) is one of the most ideal methods for current gas concentration detection. It has high sensitivity, accurate wavenumbers, good repeatability, and a wide range of applications. With the continuous innovation of FTIR instrument models and the continuous improvement of instrument performance, FTIR technology has been widely applied to various fields of production and research.

[0003] When the existing Fourier transform infrared technology is used for gas flux monitoring, since the mirrors in the optical path gas cell are exposed in the gas cell for a long time, they will be contaminated by the gas to be detected in the gas cell, thereby affecting the reflection effect of the infrared light passing through the mirrors, resulting in a large loss of light energy when the infrared light is reflected by the mirrors. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a gas flux monitoring device and method based on Fourier transform infrared technology, which is used to solve the problem that when the existing Fourier transform infrared technology is used for gas flux monitoring, since the mirrors in the optical path gas cell are exposed in the gas cell for a long time, they will be contaminated by the gas to be detected in the gas cell, thereby affecting the reflection effect of the infrared light passing through the mirrors, resulting in a large loss of light energy when the infrared light is reflected by the mirrors.

[0005] To achieve the above object and other related objects, the present invention provides a gas flux monitoring device based on Fourier transform infrared technology. The monitoring device includes an interferometer, a gas cell device, and a detector. The gas cell device includes: a bracket; a gas cell installed on the bracket, with installation cavities provided at both ends of the gas cell; a mirror assembly, two mirror assemblies are respectively rotatably arranged in the installation cavities at both ends of the gas cell, and at least one side of the mirror assembly is provided with a mirror; and a cleaning assembly installed on the bracket and inserted into the installation cavity and located on one side of the mirror assembly. When the mirror to be cleaned rotates into the installation cavity corresponding to the cleaning assembly, the gas to be detected in the gas cell that has penetrated into the installation cavity is discharged back into the gas cell, the surface of the mirror placed in the installation cavity is cleaned, and after the cleaning treatment, the installation cavity is evacuated, and then the mirror is returned to the gas cell.

[0006] In an embodiment of the present invention, the gas cell includes: a cell body, with a light inlet, a light outlet, an air inlet, and an air outlet provided at both ends of the cell body respectively, and the light inlet and the light outlet are respectively provided at the ends of the gas cell outside the installation cavity.

[0007] In an embodiment of the present invention, the mirror assembly includes: a rotating base, a spherical groove is provided in the installation cavity, the rotating base is rotatably arranged in the spherical groove, and the contact surface between the rotating base and the spherical groove is a spherical surface; and a driving rotation motor, the driving rotation motor is installed outside the gas cell, and the power output end of the driving rotation motor is connected to the rotating base to drive the rotating base to flip back and forth; wherein, the mirrors are respectively arranged on both sides of the rotating base.

[0008] In an embodiment of the present invention, the cleaning assembly includes: an exhaust assembly, the exhaust assembly is installed on the bracket, and the power output end of the exhaust assembly is inserted into the installation cavity to exhaust the installation cavity before the mirror assembly flips back and forth to switch the mirror; and a flushing and drying assembly, the flushing and drying assembly is inserted into the side of the gas cell, and the power output end of the flushing and drying assembly is located in the installation cavity between the exhaust assembly and the mirror assembly to flush the surface of the corresponding mirror returned and switched with anhydrous ethanol and blow air to dry it after flushing.

[0009] In an embodiment of the present invention, the exhaust assembly includes: a piston, the piston is slidably inserted into the installation cavity, and a piston groove corresponding to the mirror assembly and the mirror is provided on the end surface of the installation cavity; a pushing motor, the pushing motor is installed on the bracket, and the power output end of the pushing motor is connected to the piston; and a gas exchange assembly, an exhaust port is opened on the gas cell, and the gas exchange assembly switches and discharges the discharged gas in the installation cavity to the outside and into the gas cell through the exhaust port.

[0010] In an embodiment of the present invention, the gas exchange assembly includes: a check valve, the check valve is movably inserted into the exhaust port, the intake end of the check valve corresponds to the installation cavity, and the outlet end of the check valve corresponds to the inner side wall of the exhaust port; a switching valve, the switching valve is installed on the side wall of the gas cell, and the intake end of the switching valve corresponds to the inner side wall of the exhaust port, and the intake end of the switching valve is correspondingly arranged with the outlet end of the check valve, the first outlet end of the switching valve is communicated with the inner cavity of the gas cell through a circulation pipeline, and the second outlet end of the switching valve is communicated with the outside; and a pushing motor, the pushing motor is installed on the outer side wall of the gas cell, and the power output end of the pushing motor is connected to the check valve.

[0011] In an embodiment of the present invention, the flushing and drying assembly includes: sleeves, two sleeves are respectively installed on the upper and lower sides of one end of the gas cell and are communicated with the installation cavity; a first insertion rod, the first insertion rod is slidably inserted into one sleeve, and a plurality of nozzles are provided on the surface of the first insertion rod to spray anhydrous ethanol on the mirror; a second insertion rod, the second insertion rod is movably inserted into the other sleeve; a first pushing motor, the first pushing motor is installed on the bracket, and the power output end of the first pushing motor is connected to the first insertion rod; and a second pushing motor, the second pushing motor is installed on the bracket, and the power output end of the second pushing motor is connected to the second insertion rod.

[0012] In one embodiment of the present invention, an air inlet pipeline is inserted on the first plug rod, and one end of the air inlet pipeline is connected to the side wall of the first plug rod; an air outlet pipeline is inserted on the second plug rod, and one end of the air outlet pipeline is connected to the side wall of the second plug rod; wherein dry gas is introduced into the air inlet pipeline, enters the installation cavity through the side wall of the first plug rod, and is discharged from the corresponding air outlet pipeline on the second plug rod.

[0013] In one embodiment of the present invention, the end surface of the first plug rod corresponds to the inner side wall of the installation cavity, so that when the first plug rod withdraws from the installation cavity, the end surface of the first plug rod forms a blockage on the inner side wall of the installation cavity; the end surface of the second plug rod corresponds to the inner side wall of the installation cavity, so that when the second plug rod withdraws from the installation cavity, the end surface of the second plug rod forms a blockage on the inner side wall of the installation cavity.

[0014] The present invention also provides a monitoring method for the aforementioned gas flux monitoring device based on Fourier infrared technology, comprising the following steps: obtaining cleaning signals for the reflector assemblies at both ends of the gas pool, controlling the reflector on the reflector assembly on one side of the gas pool to flip to the corresponding side of the cleaning assembly; controlling the cleaning assembly to push and discharge the gas to be detected in the installation cavity between the cleaning assembly and the flipped reflector assembly into the gas pool; after the gas to be detected is emptied, controlling the cleaning assembly to spray the surface of the flipped reflector assembly with anhydrous ethanol in the installation cavity; after the spraying is completed, controlling the cleaning assembly to blow and dry the flipped reflector assembly on the inner side of the installation cavity; after the blowing and drying is completed, controlling the cleaning assembly to empty the gas in the installation cavity, and then flipping the flipped reflector assembly back into the gas pool.

[0015] As described above, the gas flux monitoring device and method based on Fourier infrared technology of the present invention have the following beneficial effects: through the cooperation between the reflector assembly and the gas pool, the reflector assembly can be used to switch back and forth between the gas pool and the installation cavity on one side of the cleaning assembly, so that after switching, the reflector can be sealed and automatically cleaned to reduce the energy loss of infrared light when passing through the reflector. In addition, the gas can be emptied after the reflector assembly is switched, which can avoid the external discharge of the gas to be detected in the gas pool, and also avoid the external gas from entering the gas pool and polluting the gas to be detected in the gas pool. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shown is a schematic diagram of the overall structure of the gas pool device of the present invention.

[0017] Figure 2 A cross-sectional view of one end of a gas cell device according to an embodiment of the present invention is shown.

[0018] Figure 3Shown is a cross-sectional view of the other end of the gas cell device provided by an embodiment of the present invention.

[0019] Figure 4 Shown is a schematic structural view of the cleaning component provided by an embodiment of the present invention.

[0020] Figure 5 Shown is a schematic structural view of the cleaning component after opening the installation cavity provided by an embodiment of the present invention.

[0021] Figure 6 Shown is a schematic structural view of the flushing and drying component provided by an embodiment of the present invention.

[0022] Figure 7 Shown is provided by an embodiment of the present invention Figure 6 Schematic structural view of the flushing and drying component after removing the installation cavity therein.

[0023] Figure 8 Shown is a schematic structural view of the exhaust component provided by an embodiment of the present invention.

[0024] Figure 9 Shown is a schematic structural view of the air change component provided by an embodiment of the present invention.

[0025] Figure 10 Shown is provided by an embodiment of the present invention Figure 9 Enlarged view at position A therein.

[0026] Figure 11 Shown is a flowchart of the monitoring method of the present invention. Detailed implementation manners

[0027] Please refer to Figure 1 , the present invention provides a gas flux monitoring device based on Fourier infrared technology. The monitoring device includes an interferometer, a gas cell device and a detector. The gas cell device includes: a bracket 1; a gas cell 2, the gas cell 2 is installed on the bracket 1, and installation cavities 201 are provided at both ends of the gas cell 2; a mirror assembly 3, two mirror assemblies 3 are respectively rotatably arranged in the installation cavities 201 at both ends of the gas cell 2, and at least one side of the mirror assembly 3 is provided with a mirror 301; and a cleaning component 4, the cleaning component 4 is installed on the bracket 1, and the cleaning component 4 is inserted into the installation cavity 201 and is located on one side of the mirror assembly 3; when the mirror 301 to be cleaned rotates into the installation cavity 201 corresponding to the cleaning component 4, the gas to be detected in the gas cell 2 that has penetrated into the installation cavity 201 is discharged back into the gas cell 2, and the surface of the mirror 301 placed in the installation cavity 201 is cleaned, and after the cleaning treatment, the installation cavity 201 is evacuated, and then, the mirror 301 is returned to the gas cell 2.

[0028] It is not difficult to find from the above that when using Fourier transform infrared technology for gas flux monitoring, the light source emits infrared light, which is reflected by a mirror to the interferometer. In the interferometer, the beam splitter divides the infrared light into two beams, one beam reaches the moving mirror and the other beam reaches the fixed mirror. The moving mirror moves at a certain speed, so that the infrared light passing through the moving mirror and the infrared light passing through the fixed mirror generate a fixed optical path difference. The two beams of infrared light with a certain optical path difference converge at the beam splitter to form interference light. The interference light exits the interferometer, passes through the aperture to adjust the light flux, is collimated by the collimating mirror, then acts on the gas to be detected through the gas cell device, and is then fed back to the detector. The detector sends the obtained interference light signal into the computer for Fourier transform processing, restores the interferogram to a spectrogram, and further calculates the gas flux entering the gas cell device according to the spectrogram.

[0029] Specifically, inside the gas cell device, the infrared light after passing through the aperture and the collimating mirror enters the gas cell 2 installed on the bracket 1. Inside the gas cell 2, it will be reflected back and forth by the mirror 301 on the mirror assembly 3 at both ends of the gas cell 2 to increase the optical path. Since the mirror 301 is exposed to the inside of the gas cell 2 for a long time, it will be contaminated by the gas to be detected, which will in turn affect the reflection effect of the infrared light passing through the mirror 301, resulting in a large loss of light energy when the infrared light is reflected by the mirror 301. Therefore, in the present invention, the mirror 301 installed on at least one side of the mirror assembly 3 can be rotated from the inside of the gas cell 2 to the inside of the installation cavity 201 and corresponding to the side of the cleaning assembly 4. The cleaning assembly 4 will further push and discharge the gas to be detected that seeps out of the gas cell 2 in the installation cavity 201 between the cleaning assembly 4 and the mirror 301 back into the gas cell 2. Subsequently, the cleaning assembly 4 sprays and washes the surface of the mirror 301 in the installation cavity 201 with, for example, anhydrous ethanol, and then dries the mirror 301 after spraying to ensure that the mirror 301 is in a clean state. Immediately afterwards, the cleaning assembly 4 evacuates the installation cavity 201 so that the inside of the installation cavity 201 is in a vacuum-sealed state. Subsequently, the mirror assembly 3 is flipped back to its original position, so that the clean mirror 301 reflects the infrared light to increase the optical path. Through the above method, it is possible to automatically clean the mirror 301 without disassembling the gas cell device, so as to reduce the energy loss of the infrared light when passing through the mirror 301. Moreover, before and after the mirror assembly 3 is flipped, by evacuating the installation cavity 201 by the cleaning assembly 4, it is possible to avoid the discharge of the gas to be detected inside the gas cell 2, and at the same time avoid the entry of external gas into the gas cell 2, thereby contaminating the gas to be detected inside the gas cell 2.

[0030] It should be noted that the mirrors 301 can be two respectively arranged on both sides of the mirror assembly 3. Thus, when one of the mirrors 301 is in use, the other mirror 301 can be switched into the installation cavity 201 for cleaning, so as to ensure that the cleaning work and the infrared light reflection work are carried out simultaneously by the two mirrors 301 respectively, thereby improving the working efficiency of the monitoring device.

[0031] As Figures 1 to 3 shown, the gas cell 2 includes: a cell body 21, and both ends of the cell body 21 are respectively provided with a light inlet 211, a light outlet 212, an air inlet 213 and an air outlet 214, and the light inlet 211 and the light outlet 212 are respectively arranged at the ends of the gas cell 2 outside the installation cavity 201.

[0032] In an embodiment of the present invention, in the gas cell 2, the infrared light processed by the diaphragm and the collimating mirror can enter the cell body 21 through the light inlet 211. In the cell body 21, it is reflected back and forth by the mirrors 301 on the mirror assemblies 3 on both sides of the cell body 21, so as to increase the optical path of the infrared light. In the cell body 21, the gas to be detected can also be introduced through the air inlet 213, and the gas to be detected can be discharged through the air outlet 214.

[0033] In this embodiment, the mirror 301 can include two types, namely the main mirror and the secondary mirror. The main mirror and the secondary mirror are respectively installed on the two mirror assemblies 3 at both ends of the cell body 21. Among them, the main mirrors are respectively installed on both sides of one mirror assembly 3, and the secondary mirrors are respectively installed on both sides of the other mirror assembly 3. The secondary mirrors on each side of the mirror assembly 3 on which the secondary mirror is installed are two arranged in parallel.

[0034] Furthermore, the mirror assembly 3 includes: a rotating base 31, a ball groove 202 is provided in the installation cavity 201, the rotating base 31 is rotatably arranged in the ball groove 202, and the contact surface between the rotating base 31 and the ball groove 202 is a spherical surface; and a driving motor 32, the driving motor 32 is installed outside the gas cell 2, and the power output end of the driving motor 32 is connected to the rotating base 31 to drive the rotating base 31 to flip back and forth; wherein, the mirrors 301 are respectively arranged on both sides of the rotating base 31.

[0035] In this embodiment, the driving motor 32 can be a servo motor. The driving motor 32 can drive the rotating base 31 to rotate in the ball groove 202 in the installation cavity 201, and the outer wall of the rotating base 31 and the inner wall of the ball groove 202 always remain sealed. When the rotating base 31 rotates to make the mirror 301 reach the set reflection position, the rotating base 31 and the ball groove 202 can be kept in a relatively sealed state, so as to avoid the mutual communication between the installation cavity 201 and the gas cell 2.

[0036] As Figures 1 to 5As shown, the cleaning component 4 includes: an exhaust component 41, which is installed on the bracket 1, and the power output end of the exhaust component 41 is inserted into the installation cavity 201 to exhaust the air in the installation cavity 201 before the mirror component 3 flips back and forth to switch the mirror 301; and a flushing and drying component 42, which is inserted into the side of the gas cell 2, and the power output end of the flushing and drying component 42 is located in the installation cavity 201 between the exhaust component 41 and the mirror component 3 to flush the surface of the corresponding mirror 301 with absolute ethanol and blow air to dry it after flushing.

[0037] In an embodiment of the present invention, when the cleaning component 4 processes the mirror 301, the exhaust component 41 can exhaust the air in the installation cavity 201 between the mirror 301 and the cleaning component 4 after the mirror component 3 flips back and forth. Specifically, after the mirror 301 flips out, the gas that seeps into the installation cavity 201 from the gas cell 2 can be discharged back into the gas cell 2, and after the mirror 301 is flushed and dried with absolute ethanol by the flushing and drying component 42, the gas in the installation cavity 201 is discharged out. And after the discharge is completed, when the mirror 301 and the mirror component 3 flip back to the original position again, the exhaust component 41 pushes the gas to be detected that seeps into the installation cavity 201 into the gas cell 2 again. Through the above method, the cleaning process of the mirrors 301 on both sides of the mirror component 3 can be completed on the premise that the gas to be detected in the gas cell 2 does not leak.

[0038] As Figures 2 to 5 and Figure 8 As shown, the exhaust component 41 includes: a piston 411, which is slidably inserted into the installation cavity 201, and a piston groove 4111 corresponding to the mirror component 3 and the mirror 301 is provided on the end surface of the installation cavity 201; a pushing motor 412, which is installed on the bracket 1, and the power output end of the pushing motor 412 is connected to the piston 411; and a gas exchange component 413, an exhaust port 215 is opened on the gas cell 2, and the gas exchange component 413 switches the discharged gas in the installation cavity 201 to be discharged to the outside and into the gas cell 2 through the exhaust port 215.

[0039] In an embodiment of the present invention, when the exhaust assembly 41 exhausts the installation cavity 201, the push motor 412 preferably a push rod motor drives the piston 411 to move back and forth in the installation cavity 201 towards the side of the mirror assembly 3, so as to realize that the gas to be detected in the installation cavity 201 between the piston 411 and the mirror assembly 3 enters the air exchange assembly 413 through the exhaust port 215, and the air exchange assembly 413 reversely discharges the gas to be detected into the gas cell 2. Or after the cleaning and drying assembly 42 finishes cleaning the mirror 301, the air exchange assembly 413 discharges the gas in the installation cavity 201 from the installation cavity 201 to ensure that the installation cavity 201 is in a vacuum state.

[0040] As Figure 10 shown, the air exchange assembly 413 includes: a check valve 4131, the check valve 4131 is movably inserted into the exhaust port 215, the intake end of the check valve 4131 corresponds to the installation cavity 201, and the outlet end of the check valve 4131 corresponds to the inner side wall of the exhaust port 215; a switching valve 4132, the switching valve 4132 is installed on the side wall of the gas cell 2, and the intake end of the switching valve 4132 corresponds to the inner side wall of the exhaust port 215, and the intake end of the switching valve 4132 is correspondingly arranged with the outlet end of the check valve 4131. The first outlet end of the switching valve 4132 is interconnected with the inner cavity of the gas cell 2 through a circulation pipeline 4133, and the second outlet end of the switching valve 4132 is connected to the outside; and a push motor 4134, the push motor 4134 is installed on the outer side wall of the gas cell 2, and the power output end of the push motor 4134 is connected to the check valve 4131.

[0041] In an embodiment of the present invention, when the air exchange assembly 413 completely evacuates the gas in the installation cavity 201, when the gas to be discharged is the gas to be detected, the switching valve 4132 is switched to be interconnected with the inner cavity of the body cell 2 through the circulation pipeline 4133. After the piston 411 reaches the maximum stroke and the side wall of the piston 411 is in full contact with the mirror assembly 3 and the mirror 301, the gas to be detected in the installation cavity 201 is completely discharged, and a small part of the remaining gas to be detected is in the exhaust port 215 between the check valve 4131 and the piston 411. When the push motor 4134 preferably a push rod motor drives the check valve 4131 to contact the piston 411 along the exhaust port 215, the gas to be detected in the exhaust port 215 is completely discharged to the intake end of the switching valve 4132 through the check valve 4131, and is discharged to the circulation pipeline 4133 through the first outlet end of the switching valve 4132, and then further discharged into the gas cell 2.

[0042] As Figures 5 to 7As shown in the figure, the flushing and drying assembly 42 includes: a sleeve 421, two sleeves 421 are respectively installed on the upper and lower sides at one end of the gas cell 2 and communicate with the installation cavity 201; a first plug rod 422, the first plug rod 422 is slidably inserted into one sleeve 421, and a plurality of spray heads 423 are provided on the surface of the first plug rod 422 to spray anhydrous ethanol on the mirror 301; a second plug rod 424, the second plug rod 424 is movably inserted into the other sleeve 421; a first pushing motor 425, the first pushing motor 425 is installed on the bracket 1, and the power output end of the first pushing motor 425 is connected to the first plug rod 422; and a second pushing motor 426, the second pushing motor 426 is installed on the bracket 1, and the power output end of the second pushing motor 426 is connected to the second plug rod 424.

[0043] In an embodiment of the present invention, when the flushing and drying assembly 42 performs flushing and drying treatment on the mirror 301, the first pushing motor 425 preferably a push rod motor pushes the first plug rod 422 to extend into the installation cavity 201 along the sleeve 421, and the second pushing motor 426 preferably a push rod motor pushes the second plug rod 424 to extend into the installation cavity 201 along the other sleeve 421. Thus, it is realized that the anhydrous ethanol is sprayed by the spray heads 423 on the first plug rod 422 to wash the surface of the mirror 301, and during the washing process, the first pushing motor 425 can drive the first plug rod 422 to move back and forth to ensure the full spraying of the surface of the mirror 301. After the spraying is completed, a drying treatment is carried out. After the drying treatment, the first plug rod 422 and the second plug rod 424 are returned to their original positions.

[0044] Furthermore, an intake pipeline 427 is inserted on the first plug rod 422, and one end of the intake pipeline 427 communicates with the side wall of the first plug rod 422; an exhaust pipeline 428 is inserted on the second plug rod 424, and one end of the exhaust pipeline 428 communicates with the side wall of the second plug rod 424; wherein, dry gas is introduced into the intake pipeline 427, enters the installation cavity 201 through the side wall of the first plug rod 422, and is discharged from the corresponding exhaust pipeline 428 on the second plug rod 424.

[0045] In this embodiment, dry gas such as inert gas can be introduced through the intake pipeline 427 to enter the installation cavity 201 from the first plug rod 422 and is discharged from the exhaust pipeline 428 on the second plug rod 424, forming a convection in the installation cavity 201, so as to realize the removal of the anhydrous ethanol on the mirror 301 and the mirror assembly 3 from the installation cavity 201, so as to realize the drying treatment of the surface of the mirror 301 and the mirror assembly 3.

[0046] Further, the end surface of the first insertion rod 422 corresponds to the inner side wall of the installation cavity 201, so that when the first insertion rod 422 exits the installation cavity 201, the end surface of the first insertion rod 422 forms a seal for the inner side wall of the installation cavity 201; the end surface of the second insertion rod 424 corresponds to the inner side wall of the installation cavity 201, so that when the second insertion rod 424 exits the installation cavity 201, the end surface of the second insertion rod 424 forms a seal for the inner side wall of the installation cavity 201.

[0047] In this embodiment, after the first insertion rod 422 and the second insertion rod 424 are subjected to the spraying and drying processes, in order to ensure the sealing performance of the installation cavity 201, the first insertion rod 422 and the second insertion rod 424 return to their original positions within the sleeve 421. At the same time, the end surface of the first insertion rod 422 corresponds to the shape of the inner surface of the installation cavity 201, and the end surface of the second insertion rod 424 corresponds to the shape of the inner surface of the installation cavity 201. Thus, while achieving the sealing of the two sleeves 421 by the first insertion rod 422 and the second insertion rod 424, it is also possible to avoid gas remaining at the ends of the first insertion rod 422 and the second insertion rod 424 when the piston 411 moves, thereby realizing the complete evacuation of the gas within the installation cavity 201.

[0048] As Figure 11 shown, the present invention also provides a monitoring method for the aforementioned gas flux monitoring device based on Fourier transform infrared technology, including the following steps:

[0049] Step S10: Obtain the cleaning signal of the mirror assembly 3 at both ends of the gas cell 2, and control the mirror 301 on the mirror assembly 3 located on one side of the gas cell 2 to flip to the corresponding side of the cleaning assembly 4;

[0050] Step S20: Control the cleaning assembly 4 to push and expel the gas to be detected in the installation cavity 201 between the cleaning assembly 4 and the flipped mirror assembly 3 back into the gas cell 2;

[0051] Step S30: After the gas to be detected is evacuated, control the cleaning assembly 4 to spray anhydrous ethanol on the surface of the flipped mirror assembly 3 within the installation cavity 201;

[0052] Step S40: After the spraying is completed, control the cleaning assembly 4 to blow air to dry the flipped mirror assembly 3 on the inner side of the installation cavity 201;

[0053] Step S50: After the air blowing and drying is completed, control the cleaning assembly 4 to evacuate the gas in the installation cavity 201, and then flip the flipped mirror assembly 3 back into the gas cell 2.

[0054] In summary, the present invention discloses a gas flux monitoring device and method based on Fourier infrared technology. Through the cooperation between the reflector assembly 3 and the gas pool 2, the reflector 301 can be switched back and forth between the gas pool 2 and the installation cavity 201 on one side of the cleaning assembly 4 through the reflector assembly 3, so that after the switching, the reflector 301 can be sealed and automatically cleaned to reduce the energy loss of infrared light when passing through the reflector 301. In addition, the gas can be emptied after the reflector assembly 3 is switched, which can avoid the external discharge of the gas to be detected in the gas pool 2, and also avoid the external gas from entering the gas pool 2 to pollute the gas to be detected in the gas pool 2. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0055] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A gas flux monitoring device based on Fourier infrared technology, characterized in that: The monitoring device comprises an interferometer, a gas pool device and a detector, and the gas pool device comprises: Bracket (1); A gas pool (2), the gas pool (2) being mounted on the bracket (1), and both ends of the gas pool (2) being provided with mounting cavities (201); A reflector assembly (3), wherein two reflector assemblies (3) are rotatably disposed in the mounting cavities (201) at two ends of the gas pool (2), and a reflector (301) is disposed on at least one side of the reflector assembly (3); and a cleaning component (4), the cleaning component (4) being mounted on the bracket (1), and the cleaning component (4) being inserted into the mounting cavity (201) and located on one side of the reflector component (3); When the reflector (301) to be cleaned is rotated into the installation cavity (201) corresponding to the cleaning component (4), the gas to be detected in the gas pool (2) that has infiltrated into the installation cavity (201) is discharged back into the gas pool (2), and the surface of the reflector (301) placed in the installation cavity (201) is cleaned, and after the cleaning process, the installation cavity (201) is vacuumed, and then the reflector (301) is returned to the gas pool (2); The reflector assembly (3) comprises: a rotating seat (31), a ball groove (202) being provided in the mounting cavity (201), the rotating seat (31) being rotatably arranged in the ball groove (202), and the contact surface between the rotating seat (31) and the ball groove (202) being a spherical surface; The cleaning component (4) comprises: an exhaust component (41), the exhaust component (41) being mounted on the bracket (1), the power output end of the exhaust component (41) being inserted into the mounting cavity (201) so as to exhaust air in the mounting cavity (201) before the reflector component (3) flips back and forth to switch the reflector (301); The exhaust assembly (41) comprises: a piston (411), the piston (411) being slidably inserted in the installation cavity (201), the end surface of the installation cavity (201) being provided with a piston groove (4111) corresponding to the reflector assembly (3) and the reflector (301); and a ventilation assembly (413), the gas pool (2) being provided with an exhaust port (215), the ventilation assembly (413) switchingly discharging exhaust gas in the installation cavity (201) to the outside and into the gas pool (2) through the exhaust port (215); The ventilation component (413) comprises: a one-way valve (4131), the one-way valve (4131) being movably inserted in the exhaust port (215), the air inlet end of the one-way valve (4131) corresponding to the installation cavity (201), and the air outlet end of the one-way valve (4131) corresponding to the inner side wall of the exhaust port (215); and a switching valve (4132), the switching valve (4132) being installed on the side wall of the gas pool (2), and the air inlet end of the switching valve (4132) corresponding to the inner side wall of the exhaust port (215). The switching valve (4132) corresponds to the gas inlet end of the one-way valve (4131), the first gas outlet end of the switching valve (4132) is connected to the inner cavity of the gas pool (2) through a circulation pipeline (4133), and the second gas outlet end of the switching valve (4132) is connected to the outside; and a pushing motor (4134), the pushing motor (4134) is installed on the outer wall of the gas pool (2), and the power output end of the pushing motor (4134) is connected to the one-way valve (4131).

2. The gas flux monitoring device based on Fourier infrared technology according to claim 1, characterized in that: The gas pool (2) comprises: A pool body (21), wherein two ends of the pool body (21) are respectively provided with a light inlet (211), a light outlet (212), an air inlet (213) and an air outlet (214), and the light inlet (211) and the light outlet (212) are respectively provided at the end of the gas pool (2) outside the installation cavity (201).

3. The gas flux monitoring device based on Fourier infrared technology according to claim 1, characterized in that: The reflector assembly (3) further comprises: A rotating motor (32), the rotating motor (32) being mounted outside the gas pool (2), and a power output end of the rotating motor (32) being connected to the rotating seat (31) to drive the rotating seat (31) to flip back and forth; Wherein, the reflectors (301) are respectively arranged on both sides of the rotating seat (31).

4. The gas flux monitoring device based on Fourier infrared technology according to claim 1, characterized in that: The cleaning component (4) further comprises: A flushing and drying component (42), the flushing and drying component (42) is inserted into the side of the gas pool (2), and the power output end of the flushing and drying component (42) is located in the installation cavity (201) between the exhaust component (41) and the reflector component (3), so as to flush the surface of the reflector (301) corresponding to the return switch with anhydrous ethanol, and blow air to dry it after flushing.

5. The gas flux monitoring device based on Fourier infrared technology according to claim 1, characterized in that: The exhaust assembly (41) further comprises: A pushing motor (412), wherein the pushing motor (412) is mounted on the bracket (1), and a power output end of the pushing motor (412) is connected to the piston (411).

6. The gas flux monitoring device based on Fourier infrared technology according to claim 4 is characterized in that: The rinsing and drying assembly (42) comprises: Sleeves (421), two sleeves (421) are respectively installed on upper and lower sides of one end of the gas pool (2), and are connected to the installation cavity (201); A first insertion rod (422), the first insertion rod (422) being slidably inserted in one of the sleeves (421), and a plurality of spray heads (423) being provided on the surface of the first insertion rod (422) for spraying anhydrous ethanol onto the reflector (301); A second insertion rod (424), the second insertion rod (424) being movably inserted in the other sleeve (421); a first push motor (425), the first push motor (425) being mounted on the bracket (1), the power output end of the first push motor (425) being connected to the first insertion rod (422); and A second push motor (426), wherein the second push motor (426) is mounted on the bracket (1), and a power output end of the second push motor (426) is connected to the second insertion rod (424).

7. The gas flux monitoring device based on Fourier infrared technology according to claim 6 is characterized in that: An air intake pipeline (427) is inserted into the first insertion rod (422), and one end of the air intake pipeline (427) is connected to the side wall of the first insertion rod (422); An air outlet pipeline (428) is inserted into the second insertion rod (424), and one end of the air outlet pipeline (428) is connected to the side wall of the second insertion rod (424); The dry gas is introduced into the air inlet pipeline (427), enters the installation cavity (201) through the side wall of the first insertion rod (422), and is discharged from the corresponding air outlet pipeline (428) on the second insertion rod (424).

8. The gas flux monitoring device based on Fourier infrared technology according to claim 6, characterized in that: The end surface of the first insertion rod (422) corresponds to the inner side wall of the installation cavity (201), so that when the first insertion rod (422) withdraws from the installation cavity (201), the end surface of the first insertion rod (422) forms a blockage on the inner side wall of the installation cavity (201); the end surface of the second insertion rod (424) corresponds to the inner side wall of the installation cavity (201), so that when the second insertion rod (424) withdraws from the installation cavity (201), the end surface of the second insertion rod (424) forms a blockage on the inner side wall of the installation cavity (201).

9. A monitoring method for a gas flux monitoring device based on Fourier infrared technology according to any one of claims 1 to 8, characterized in that: The steps include: Acquiring cleaning signals for the reflector assemblies (3) at both ends of the gas pool (2), and controlling the reflector (301) on the reflector assembly (3) located on one side of the gas pool (2) to flip to the corresponding side of the cleaning assembly (4); Controlling the cleaning component (4) to push and discharge the gas to be detected in the installation cavity (201) between the cleaning component (4) and the turned-over reflector component (3) into the gas pool (2); After the gas to be detected is exhausted, controlling the cleaning component (4) to spray clean the surface of the turned-over reflector component (3) with anhydrous ethanol in the installation cavity (201); After the spray cleaning is completed, controlling the cleaning component (4) to blow air and dry the turned-over reflector component (3) inside the mounting cavity (201); After the air drying is completed, the cleaning component (4) is controlled to exhaust the gas in the installation cavity (201), and then the turned-over reflector component (3) is turned over and returned to the gas pool (2).

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