Multi-round-trip-reflection sample cell and working method thereof

Abstract

The invention belongs to the technical field of detection, and particularly relates to a multi-round-trip-reflection sample cell and a working method thereof.The multi-round-trip-reflection sample cell comprises a main cavity and an auxiliary cavity, and the auxiliary cavity is provided with an air inlet and an air outlet set communicated with the main cavity; the adjusting mechanism is located in the auxiliary cavity and suitable for adjusting the size of the air outlet set according to the air pressure in the auxiliary cavity. The inflation assembly is connected with the air inlet pipe of the main chamber; the electromagnetic valve is connected with the air outlet pipe of the main chamber; a detection module; according to the multi-back-and-forth reflection sample cell, the main cavity is filled with an excessive volume of medium at a constant speed through the air inflation assembly, and then the excessive volume of medium is discharged by opening the electromagnetic valve, so that in the exhaust process, the sample cell is subjected to multiple-back-and-forth reflection, and the sample cell is subjected to multiple-back-and-forth reflection; the effect that the medium in the auxiliary cavity disturbs the medium in the main cavity due to the pressure difference is achieved.

Description

Technical Field

[0001] The invention belongs to the field of detection technology, and specifically relates to testing or analyzing materials by means of determining the chemical or physical properties of the materials, and more particularly to a multiple round-trip reflection sample pool and a working method thereof. Background Art

[0002] The concentration of the medium can be detected by repeatedly reflecting the sample cell back and forth. The specific method is to inject the medium into a chamber at a constant speed and quantity, and emit a laser to the chamber through a laser transmitter, so that the light passes through the medium in the chamber and is received by a receiver. The transmittance of the chamber is determined based on the intensity of the received light, and then the concentration of the medium in the chamber is calculated.

[0003] In the related art, in order to make the medium in the chamber evenly distributed, a turbulence device is generally provided in the chamber, for example, by blowing turbulence to the medium in the chamber, so as to make the medium evenly distributed.

[0004] However, during the implementation of the above scheme, due to the different concentrations of the medium, the requirements for the disturbance intensity are also different, which leads to insufficient disturbance or excessive disturbance, making it impossible to evenly distribute the medium, thereby affecting the detection accuracy.

[0005] Therefore, how to solve the technical problem that the existing disturbance source with built-in fixed intensity has insufficient disturbance or excessive disturbance is urgently needed to be solved by technical personnel in this field.

[0006] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the invention

[0007] The disclosed embodiments at least provide a multiple round-trip reflection sample cell and a working method thereof.

[0008] In the first aspect, the embodiment of the present disclosure provides a multiple round-trip reflection sample cell, comprising: a detection chamber, which comprises: a main chamber and a sub-chamber, wherein the sub-chamber is provided with an air inlet and an air outlet group connected to the main chamber; an adjustment mechanism, located in the sub-chamber; an air filling component, connected to the air inlet pipe of the main chamber; an electromagnetic valve, connected to the air outlet pipe of the main chamber; a detection module; a control module, electrically connected to the air filling component, the electromagnetic valve, and the detection module, wherein the control module is configured to control the air filling component to fill the main chamber with an excessive volume of medium at a constant speed, and then control the electromagnetic valve to open the air outlet pipe to gradually discharge the excess volume of the medium, and the control module is further configured to control the detection module to detect the transmittance of the main chamber after the main chamber is exhausted; wherein, during the exhaust process of the main chamber, the sub-chamber disturbs the medium in the main chamber due to the pressure difference to make the medium evenly distributed, and at the same time, the adjustment mechanism adjusts the size of the air outlet group according to the reduction of the air pressure in the sub-chamber to gradually reduce the disturbance intensity. .

[0009] In an optional embodiment, the adjustment mechanism includes: a baffle and an elastic component; wherein one end of the elastic component is connected to the inner wall of the sub-chamber, and the other end is connected to the baffle, and a avoidance hole group is provided on the baffle; during the inflation of the main chamber, the elastic component retreats a corresponding distance according to the air pressure intensity in the sub-chamber, so that the avoidance hole group and the air outlet group overlap an area of ​​corresponding size; during the exhaust of the main chamber, the elastic component gradually resets according to the air pressure intensity in the sub-chamber to close the air outlet group, that is, gradually reduces the turbulence intensity.

[0010] In an optional embodiment, the elastic component includes: a spring and a slider; wherein the baffle is slidably arranged in the middle of the sub-chamber, and the slider is slidably arranged at one end of the sub-chamber; one side of the slider is connected to the inner wall of the sub-chamber through a spring, and the other side is connected to the baffle; wherein the slider is suitable for sliding according to the air pressure intensity in the sub-chamber to drive the baffle to adjust the size of the air outlet group.

[0011] In an optional embodiment, the air inlet is opened at the other end of the sub-chamber, and the air outlet group is opened in the middle of the sub-chamber.

[0012] In a second aspect, the disclosed embodiment also provides a working method of a multiple-reciprocating reflection sample pool, comprising: controlling the inflation assembly through the control module to fill an excess volume of medium into the main chamber at a constant speed, so that the regulating mechanism in the sub-chamber opens the gas outlet group; controlling the solenoid valve through the control module to discharge the excess volume of medium from the main chamber; wherein during the exhaust process of the main chamber, the sub-chamber disturbs the medium in the main chamber due to the pressure difference, and at the same time the regulating mechanism gradually closes the gas outlet group due to the pressure difference to gradually reduce the intensity of the disturbance.

[0013] In an optional embodiment, the method of controlling the inflation assembly to fill an excess volume of medium into the main chamber through a control module so that the regulating mechanism in the sub-chamber opens the air outlet group includes: controlling the inflation assembly to fill an excess volume of medium into the main chamber through a control module; the sub-chamber receives the medium in the main chamber through an air inlet thereon until the pressure is balanced; and the regulating mechanism opens the air outlet group by increasing the air pressure in the sub-chamber.

[0014] In an optional embodiment, the method in which the regulating mechanism opens the air outlet group by increasing the air pressure in the sub-chamber includes: the air pressure in the sub-chamber changes according to the different media; the regulating mechanism opens the air outlet group of corresponding size according to the size of the air pressure in the sub-chamber to adjust the turbulence intensity in the initial state.

[0015] In an optional embodiment, the method of controlling the solenoid valve through the control module to discharge the excess volume of the medium from the main chamber includes: after the pressure in the main chamber and the sub-chamber is balanced, controlling the solenoid valve to open through the control module to discharge the excess volume of the medium from the main chamber; wherein the volume data of the medium discharged by the solenoid valve is obtained through the flow sensor and sent to the control module.

[0016] In an optional embodiment, the method in which the sub-chamber disturbs the medium in the main chamber due to the pressure difference during the exhaust process of the main chamber includes: forming a pressure difference between the main chamber and the sub-chamber by exhausting the main chamber; and the sub-chamber sprays the medium into the main chamber through the outlet group thereon due to the pressure difference to disturb the flow.

[0017] In an optional embodiment, the method in which the regulating mechanism gradually closes the air outlet group due to the pressure difference to gradually reduce the turbulence intensity includes: the sub-chamber gradually reduces the air pressure by spraying a medium into the main chamber; the regulating mechanism gradually closes the air outlet group according to the reduction in air pressure in the sub-chamber, that is, gradually reduces the turbulence intensity.

[0018] The beneficial effects of the present invention are that the multiple reciprocating reflection sample cell and its working method fill an excess volume of medium into the main chamber through the inflation component and then discharge the excess volume of medium by opening the solenoid valve, so that during the exhaust process, the medium in the sub-chamber disturbs the medium in the main chamber due to the pressure difference; at the same time, the air outlet group is gradually closed by the adjustment mechanism to reduce the disturbance intensity, so as to prevent the high-intensity disturbance in the later stage of the disturbance from causing uneven medium; and the size of the initial air outlet group is adjusted by the adjustment mechanism according to the different medium concentrations, so as to achieve initial disturbance intensities of different sizes.

[0019] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, this article specifically cites preferred embodiments and provides detailed descriptions as follows in conjunction with the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of a detection chamber provided in an embodiment of the present disclosure; Figure 2 A schematic diagram of the structure of a multiple round-trip reflection sample cell provided in an embodiment of the present disclosure; Figure 3 A schematic diagram of a cross-sectional structure of a detection chamber provided in an embodiment of the present disclosure when it is not inflated; Figure 4 A schematic diagram of the cross-sectional structure of a detection chamber after inflation provided in an embodiment of the present disclosure.

[0023] In the figure: Detection chamber 1, main chamber 11, sub-chamber 12, air inlet 13, air outlet group 14; Adjustment mechanism 3, baffle 31, avoidance hole group 311, elastic component 32, spring 321, slider 322; Shell 4 , air inlet pipe 41 , air outlet pipe 42 . DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] As the main application area of ​​the multiple-return reflection sample cell, it is usually configured to detect gas concentration data, such as petroleum gas (shale gas, coal rock gas, natural gas and drilling gas) or polluted air, and obtain the current detection concentration information through the change of the refractive index of light. Since the multiple-return reflection sample cell is a static sample cell, in order to make the detection result accurate, the concentration distribution of the gas in the sample cell should be ensured as uniform as possible during the detection. This is because gases of different components may be stratified or have different concentrations in different areas. In particular, for gas mixtures with large density differences, the distribution of gas may be more uneven. In this regard, in the relevant technology, a disturbance device will be added to the sample cell to help the gas be evenly distributed in the cell to avoid local concentration differences caused by gas sedimentation or stagnant flow. In addition, due to the different interaction forces between gas molecules of the same gas under different concentration conditions, the number of molecules of the concentrated gas is dense, the density is large, and the kinetic energy of the gas is low. This means that their response may be slow when disturbed, so a larger disturbance may be required to ensure that the gas is evenly distributed in the sample cell. Low-concentration gas has a lower density and a larger molecular distance, so it is more mobile. Small disturbances may cause rapid diffusion of these gas molecules, thus affecting the uniformity of the gas in the sample pool. However, since the staff cannot know the gas concentration data in advance before the test, In other words, the disturbance intensity cannot be adjusted by the concentration state of the gas, and can only be set to a fixed disturbance intensity. This means that if the current gas concentration is low, still applying disturbance will cause a local temperature gradient or reactivity difference in the gas.

[0026] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, in the drawings, the thickness of the components may be exaggerated or reduced in order to effectively describe the technical content.

[0027] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0028] like Figures 1 to 4 As shown, at least one embodiment provides a multiple round-trip reflection sample pool, including: a detection chamber 1, an inflation component, a solenoid valve, a detection module and a control module, and the control module is electrically connected to the detection module, the solenoid valve, and the inflation component.

[0029] like Figure 3 As shown, in some embodiments, the detection chamber 1 includes: a main chamber 11 and a sub-chamber 12 , and the sub-chamber 12 is provided with an air inlet 13 and an air outlet group 14 communicating with the main chamber 11 .

[0030] like Figure 1 , Figure 2 As shown, in some embodiments, the detection chamber 1 is installed in a shell 4, the main chamber 11 is connected to an air inlet pipe 41 and an air outlet pipe 42, the inflation component is connected to the air inlet pipe 41, and the solenoid valve is arranged on the air outlet pipe 42.

[0031] In this embodiment, the control module controls the inflation component to fill an excess volume of medium into the main chamber 11. During the inflation process, the medium in the main chamber 11 will enter the sub-chamber 12 through the air inlet 13 until the pressure in the main chamber 11 and the sub-chamber 12 is balanced; when the inflation component is inflated, the control module controls the solenoid valve to open the air outlet pipe 42 to discharge the excess volume of medium in the main chamber 11; wherein a flow sensor is provided in the air outlet pipe 42, and the flow sensor is used to obtain volume data of the discharged medium and send it to the control module.

[0032] Also, during the exhaust process of the main chamber 11, since it is the main chamber 11 that is exhausting, the air pressure in the main chamber 11 will decrease before that in the sub-chamber 12. Therefore, the medium in the sub-chamber 12 will rush into the main chamber 11 due to the pressure difference, thereby achieving a turbulent effect on the medium in the main chamber 11, making the medium in the main chamber 11 more evenly distributed; at the same time, since the medium in the sub-chamber 12 is replenished into the main chamber 11, the air pressure in the sub-chamber 12 will gradually decrease. At this time, the regulating mechanism 3 will gradually reset, thereby gradually closing the opened air outlet group 14, that is, gradually reducing the turbulence intensity, wherein, as the turbulence proceeds, the medium in the main chamber 11 will gradually be evenly distributed, and the gradual reduction in turbulence intensity can avoid the medium in the main chamber 11 becoming uneven again due to excessive turbulence in the later stage of turbulence.

[0033] In some embodiments, the regulating mechanism 3 is disposed in the sub-chamber 12 , and the regulating mechanism 3 can open the air outlet group 14 of corresponding size according to the air pressure in the sub-chamber 12 .

[0034] In this embodiment, after the main chamber 11 is filled with the medium, the pressure of the sub-chamber 12 will also increase due to the air inlet 13 receiving the medium, thereby pushing the regulating mechanism 3 to open the air outlet group 14; wherein, the air pressure in the sub-chamber 12 will change according to the different medium filled, and different media have different concentrations. When the volume of the filled medium is fixed, the greater the concentration of the medium, the greater the air pressure in the sub-chamber 12, the greater the distance the regulating mechanism 3 retreats, the greater the opening of the air outlet group 14, that is, the intensity of the initial turbulence is also greater. Conversely, the smaller the concentration of the medium, the smaller the air pressure in the sub-chamber 12, the smaller the distance the regulating mechanism 3 retreats, the smaller the opening of the air outlet group 14, that is, the intensity of the initial turbulence is also smaller.

[0035] In this embodiment, the adjustment mechanism 3 is provided to make the intensity of the initial disturbance flow self-adjustable according to the concentration of the medium, thereby preventing the low-concentration medium from being unevenly distributed due to the strong disturbance flow, and also preventing the high-concentration medium from being unevenly distributed due to the weak disturbance flow.

[0036] In some embodiments, the inflation component may be, but is not limited to, an air pump (not shown in the figure), and a flow meter is configured to control the volume of the medium filled into the main chamber 11.

[0037] In an optional embodiment, the volume of the detection chamber 1 is 2 liters, the preset volume of the medium filled is 3 liters, the volume of the medium filled into the main chamber 11 by the inflation component is 5 liters, and the volume of the medium discharged by the solenoid valve is 2 liters.

[0038] In some embodiments, the control module may be but is not limited to using PLC; the control module is configured to control the detection module to detect the transmittance of the main chamber 11 after the exhaust of the main chamber 11 is completed (ie, the turbulence is completed).

[0039] In this embodiment, the transmittance of the main chamber 11 is detected immediately after the turbulence ends to prevent the medium from becoming uneven again due to standing still, thereby affecting the detection accuracy; optionally, the detection module is implemented using existing technology, for example, it may include: an emitting source and a receiving source, the control module controls the emitting source to emit a beam of light of known intensity to the main chamber 11, the receiving source is used to receive and obtain the intensity data of the light, and the control module obtains the transmittance through the difference in the intensity of the emitted and received light.

[0040] like Figure 3 As shown, in some embodiments, the adjustment mechanism 3 includes: a baffle 31 and an elastic component 32; wherein one end of the elastic component 32 is connected to the inner wall of the sub-chamber 12, and the other end is connected to the baffle 31, and an avoidance hole group 311 is opened on the baffle 31.

[0041] In this embodiment, during the inflation of the main chamber 11, the elastic component 32 retreats as the air pressure in the sub-chamber 12 increases. When the pressures in the sub-chamber 12 and the main chamber 11 are balanced (i.e., after inflation is completed), the elastic component 32 retreats a corresponding distance according to the air pressure intensity in the sub-chamber 12, so that the avoidance hole group 311 and the air outlet group 14 overlap an area of ​​a corresponding size (the greater the air pressure intensity in the sub-chamber 12, the greater the retreat distance of the elastic component 32, the larger the overlapping area between the avoidance hole group 311 and the air outlet group 14, that is, the larger the air outlet group 14); during the exhaust of the main chamber 11, the air pressure intensity in the sub-chamber 12 gradually decreases, the elastic component 32 gradually resets, and the air outlet group 14 gradually closes, that is, the turbulence intensity gradually decreases.

[0042] Specifically, Figure 4As shown, the elastic component 32 includes: a spring 321 and a slider 322; wherein the baffle 31 is slidably set in the middle of the sub-chamber 12, and the slider 322 is slidably set at one end of the sub-chamber 12; one side of the slider 322 is connected to the inner wall of the sub-chamber 12 through the spring 321, and the other side is connected to the baffle 31; wherein the slider 322 is suitable for sliding according to the air pressure intensity in the sub-chamber 12 to drive the baffle 31 to adjust the size of the outlet group 14.

[0043] In this embodiment, the slider 322 is slidably arranged in the sub-chamber 12. When the air pressure intensity in the sub-chamber 12 increases, the slider 322 is forced to retreat to squeeze the spring 321; wherein, the distance that the slider 322 drives the baffle 31 to retreat is related to the air pressure intensity in the sub-chamber 12. When the air pressure intensity in the sub-chamber 12 is high, the distance that the slider 322 is forced to retreat is also large, the distance that the slider 322 drives the baffle 31 to retreat is also large, the area of ​​the region where the avoidance hole group 311 overlaps with the air outlet group 14 is also large, and the initial turbulence intensity is also large.

[0044] In some embodiments, the air inlet 13 is opened at the other end of the sub-chamber 12 , the air inlet 13 and the slider 322 are respectively located at two ends of the sub-chamber 12 , and the air outlet group 14 is opened in the middle of the sub-chamber 12 .

[0045] In this embodiment, the air outlet group 14 is located between the air inlet 13 and the slider 322; when the main chamber 11 is not inflated, the spring 321 pushes the slider 322 to move, so that the avoidance hole group 311 on the baffle 31 is misaligned with the air outlet group 14 to close the air outlet group 14; when the main chamber 11 is inflated, the medium will enter the sub-chamber 12 from the air inlet 13, thereby increasing the air pressure in the sub-chamber 12, causing the slider 322 to be forced to retreat, that is, the avoidance hole group 311 on the baffle 31 coincides with the air outlet group 14 to open the air outlet group 14.

[0046] At least one embodiment provides a working method of a multiple round-trip reflection sample pool, comprising: controlling the inflation component through a control module to fill an excess volume of medium into the main chamber 11, so that the regulating mechanism 3 in the sub-chamber 12 opens the outlet group 14; controlling the inflation component through the control module to discharge the excess volume of medium from the main chamber 11; wherein during the exhaust process of the main chamber 11, the sub-chamber 12 disturbs the medium in the main chamber 11 due to the pressure difference, and at the same time, the regulating mechanism 3 gradually closes the outlet group 14 due to the pressure difference to gradually reduce the disturbance intensity.

[0047] In this embodiment, during the exhaust process of the main chamber 11, since it is the main chamber 11 that is exhausting, the air pressure in the main chamber 11 will be smaller than the air pressure in the sub-chamber 12, and at this time, the medium in the sub-chamber 12 will be replenished into the main chamber 11 due to the pressure difference, thereby achieving a turbulence effect, and the medium in the main chamber 11 is distributed more evenly through the turbulence; at the same time, since the medium in the sub-chamber 12 is replenished into the main chamber 11, the air pressure in the sub-chamber 12 will gradually decrease, and at this time the regulating mechanism 3 will gradually reset, thereby gradually closing the opened air outlet group 14, that is, gradually reducing the turbulence intensity, wherein, as the turbulence proceeds, the medium will gradually be evenly distributed, and the gradual reduction in turbulence intensity can avoid the medium becoming uneven again due to excessive turbulence in the later stage of turbulence.

[0048] In some embodiments, the method of controlling the inflation component to fill an excess volume of medium into the main chamber 11 through the control module so that the regulating mechanism 3 in the sub-chamber 12 opens the air outlet group 14 includes: controlling the inflation component to fill an excess volume of medium into the main chamber 11 through the control module; the sub-chamber 12 receives the medium in the main chamber 11 through the air inlet 13 thereon until the pressure is balanced; the regulating mechanism 3 opens the air outlet group 14 by increasing the air pressure in the sub-chamber 12.

[0049] In some embodiments, the method by which the regulating mechanism 3 opens the air outlet group 14 by increasing the air pressure in the sub-chamber 12 includes: the air pressure in the sub-chamber 12 changes according to the different media; the regulating mechanism 3 opens the air outlet group 14 of corresponding size according to the size of the air pressure in the sub-chamber 12 to adjust the turbulence intensity in the initial state.

[0050] In this embodiment, the air pressure in the sub-chamber 12 will change according to the different filled media, and different media have different concentrations; when the concentration of the filled medium is high, the air pressure in the sub-chamber 12 is also high, the regulating mechanism 3 retreats a greater distance, the air outlet group 14 opens a larger distance, that is, the intensity of the initial turbulence is also greater; conversely, when the concentration of the filled medium is low, the air pressure in the sub-chamber 12 is also low, the regulating mechanism 3 retreats a smaller distance, the air outlet group 14 opens a smaller distance, that is, the intensity of the initial turbulence is also low; this embodiment can self-regulate the intensity of the initial turbulence according to the concentration of the medium by setting the regulating mechanism 3, thereby preventing low-concentration media from being unevenly affected by high-intensity turbulence, and also preventing high-concentration media from being unevenly affected by low-intensity turbulence.

[0051] In some embodiments, the method of controlling the inflation component through a control module to cause the main chamber 11 to discharge an excess volume of the medium includes: after the pressures in the main chamber 11 and the sub-chamber 12 are balanced, controlling the inflation component through the control module to cause the main chamber 11 to discharge an excess volume of the medium; wherein the volume of the medium discharged by the inflation component is obtained through a flow sensor and sent.

[0052] In some embodiments, during the exhaust process of the main chamber 11, the method for the sub-chamber 12 to disturb the medium in the main chamber 11 due to the pressure difference includes: forming a pressure difference between the main chamber 11 and the sub-chamber 12 by exhausting the main chamber 11; and the sub-chamber 12 spraying the medium into the main chamber 11 through the outlet group 14 thereon due to the pressure difference to disturb the flow.

[0053] In some embodiments, the method by which the regulating mechanism 3 gradually closes the air outlet group 14 due to the pressure difference to gradually reduce the turbulence intensity includes: the sub-chamber 12 gradually reduces the air pressure by spraying a medium into the main chamber 11; the regulating mechanism 3 gradually closes the air outlet group 14 according to the reduction in the air pressure in the sub-chamber 12, that is, gradually reduces the turbulence intensity.

[0054] In summary, the multiple reciprocating reflection sample cell and its working method are to charge an excess volume of medium into the main chamber 11 at a constant speed through the inflation component and then discharge the excess volume of medium by opening the solenoid valve, so that during the exhaust process, the medium in the sub-chamber 12 disturbs the medium in the main chamber 11 due to the pressure difference; at the same time, the air outlet group 14 is gradually closed by the adjustment mechanism 3 to reduce the disturbance intensity, so as to prevent the high-intensity disturbance in the later stage of the disturbance from causing uneven medium; and the size of the initial air outlet group 14 is adjusted by the adjustment mechanism 3 according to the different medium concentrations, so as to achieve initial disturbance intensities of different sizes.

[0055] Herein, when it is mentioned that a first component is located on a second component, this may mean that the first component may be directly formed on the second component, or a third component may be interposed between the first component and the second component.

[0056] In this article, when an element or layer is referred to as being "located on," "engaged to," "connected to," "attached to," or "coupled to" another element or layer, it may be directly located on, engaged, connected, attached to, or coupled to another element or layer, or there may be intermediate elements or layers. In contrast, when an element is referred to as being "directly on," "directly engaged to," "directly connected to," "directly attached to," or "directly coupled to" another element or layer, there may be no intermediate elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0057] Herein, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0058] The terms used herein are only used to describe specific exemplary configurations and are not intended to be limited. As used herein, the singular articles "one", "an" and "the" may also be intended to include plural forms, unless it is clearly indicated above that this is not the case. The terms "comprise", "include" and "have" are inclusive, and therefore specify the presence of features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or combinations thereof. The method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

[0059] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Therefore, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. On the contrary, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0060] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used in this document unless explicitly indicated above. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or section discussed above may be referred to as a second element, component, region, layer or section.

[0062] Spatially relative terms, such as "inside", "outside", "below", "below", "down", "above", "on", etc., may be used herein to facilitate description of the relationship of one element or feature to another element or feature as illustrated in the figure. In addition to the orientation depicted in the figure, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is turned over, the elements described as "below" or "below" other elements or features will be oriented to be "above" other elements or features. Therefore, the example term "below" can cover the orientation above and below. The device can be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0063] In the above discussion, unless otherwise stated, the terms "about," "approximately," "substantially," etc., when used to describe a numerical value, mean a variation of + / - 10% of the value.

[0064] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A multiple round-trip reflection sample cell, characterized in that: include: A detection chamber (1), comprising: a main chamber (11) and a sub-chamber (12), wherein the sub-chamber (12) is provided with an air inlet (13) and an air outlet group (14) which are in communication with the main chamber (11); An adjustment mechanism (3) located in the secondary chamber (12); An air charging assembly connected to an air inlet pipe (41) of the main chamber (11); A solenoid valve connected to an air outlet pipe (42) of the main chamber (11); Detection module; a control module electrically connected to the inflation component, the solenoid valve, and the detection module, the control module being configured to control the inflation component to charge an excess volume of medium into the main chamber (11) at a constant speed, and then control the solenoid valve to open the air outlet pipe (42) to gradually discharge the excess volume of medium, and the control module being further configured to control the detection module to detect the transmittance of the main chamber (11) after the main chamber (11) is exhausted; In the process of exhausting the main chamber (11), the secondary chamber (12) disturbs the medium in the main chamber (11) due to the pressure difference so that the medium is evenly distributed, and at the same time, the regulating mechanism (3) adjusts the size of the air outlet group (14) according to the reduction of the air pressure in the secondary chamber (12) to gradually reduce the intensity of the disturbance.

2. The multiple round-trip reflection sample cell according to claim 1, characterized in that: The regulating mechanism (3) comprises: a baffle (31) and an elastic component (32); wherein One end of the elastic component (32) is connected to the inner wall of the sub-chamber (12), and the other end is connected to the baffle (31); the baffle (31) is provided with an avoidance hole group (311); During the inflation process of the main chamber (11), the elastic component (32) retreats a corresponding distance according to the air pressure intensity in the secondary chamber (12), so that the avoidance hole group (311) and the air outlet group (14) overlap an area of ​​a corresponding size; During the exhaust process of the main chamber (11), the elastic component (32) is gradually reset according to the air pressure intensity in the secondary chamber (12) to close the air outlet group (14), that is, the turbulence intensity is gradually reduced.

3. The multiple round-trip reflection sample cell as claimed in claim 2, characterized in that: The elastic component (32) comprises: a spring (321) and a slider (322); wherein The baffle (31) is slidably disposed in the middle of the auxiliary chamber (12), and the slider (322) is slidably disposed at one end of the auxiliary chamber (12); One side of the slider (322) is connected to the inner wall of the sub-chamber (12) via a spring (321), and the other side is connected to the baffle (31); The slider (322) is suitable for sliding according to the air pressure intensity in the sub-chamber (12) to drive the baffle (31) to adjust the size of the air outlet group (14).

4. The multiple reciprocating reflection sample cell as claimed in claim 3, characterized in that: The air inlet (13) is opened at the other end of the sub-chamber (12), and the air outlet group (14) is opened in the middle of the sub-chamber (12).

5. A method for operating a multiple-round-trip reflection sample cell, characterized in that: include: The control module controls the inflation component to fill the main chamber (11) with an excess volume of medium at a constant speed, so that the regulating mechanism (3) in the secondary chamber (12) opens the gas outlet group (14); The solenoid valve is controlled by the control module to discharge the excess volume of the medium from the main chamber (11); During the exhaust process of the main chamber (11), the secondary chamber (12) disturbs the medium in the main chamber (11) due to the pressure difference, and the regulating mechanism (3) gradually closes the gas outlet group (14) due to the pressure difference to gradually reduce the intensity of the disturbance.

6. The working method of the multiple round-trip reflection sample cell as claimed in claim 5, characterized in that: The method of controlling the inflation component to fill the main chamber (11) with an excess volume of medium at a constant speed through a control module so that the regulating mechanism (3) in the secondary chamber (12) opens the gas outlet group (14) comprises: Controlling the inflation component to fill an excess volume of medium into the main chamber (11) through a control module; The secondary chamber (12) receives the medium in the main chamber (11) through the air inlet (13) thereon until the pressure is balanced; The regulating mechanism (3) opens the gas outlet group (14) by increasing the gas pressure in the sub-chamber (12).

7. The working method of the multiple round-trip reflection sample cell as claimed in claim 6, characterized in that: The method in which the regulating mechanism (3) opens the gas outlet group (14) by increasing the gas pressure in the sub-chamber (12) comprises: The gas pressure in the sub-chamber (12) changes according to the medium; The regulating mechanism (3) opens the air outlet group (14) of corresponding size according to the air pressure in the sub-chamber (12) to adjust the turbulence intensity in the initial state.

8. The working method of the multiple round-trip reflection sample cell as claimed in claim 7, characterized in that: The method of controlling the solenoid valve through a control module to discharge the excess volume of the medium from the main chamber (11) comprises: After the pressures in the main chamber (11) and the secondary chamber (12) are balanced, the control module controls the solenoid valve to open so that the main chamber (11) discharges the excess volume of the medium; The volume data of the medium discharged by the solenoid valve is obtained through the flow sensor and sent to the control module.

9. The working method of the multiple round-trip reflection sample cell as claimed in claim 8, characterized in that: The method of causing the secondary chamber (12) to disturb the medium in the main chamber (11) due to the pressure difference during the exhaust process of the main chamber (11) comprises: Exhausting the main chamber (11) to form a pressure difference between the main chamber (11) and the secondary chamber (12); Due to the pressure difference, the secondary chamber (12) sprays the medium into the main chamber (11) through the gas outlet group (14) thereon to cause flow disturbance.

10. The working method of the multiple round-trip reflection sample cell according to claim 9, characterized in that: The method in which the regulating mechanism (3) gradually closes the air outlet group (14) due to the pressure difference to gradually reduce the turbulence intensity comprises: The secondary chamber (12) gradually reduces the gas pressure by spraying a medium into the main chamber (11); The regulating mechanism (3) gradually closes the air outlet group (14) according to the decrease in air pressure in the sub-chamber (12), that is, gradually reduces the turbulence intensity.

Images