Gas measurement assembly and gas measurement method

Abstract

The invention discloses a gas measurement assembly and a gas measurement method, and relates to the technical field of gas detection, the gas measurement assembly comprises a first sampling device, a second sampling device, a driving device and a detection device, the first sampling device comprises a first enrichment cavity for a paper tape to pass through and a first gas channel for gas flow to pass through the first enrichment cavity along a direction vertical to the paper tape; the second sampling device comprises a second enrichment cavity through which the paper tape passes and a second gas channel through which the gas flow passes through the second enrichment cavity along the direction vertical to the paper tape; the driving device is configured to be used for driving the paper tape to move along the advancing track and driving the paper tape positioned on the first sampling device and the paper tape positioned on the second sampling device to move independently; the detection device can move between a first position opposite to the first sampling device and a second position opposite to the second sampling device. According to the gas measurement assembly provided by the embodiment of the invention, the sampling efficiency can be improved, and the gas measurement assembly is economical and practical.

Description

Technical Field

[0001] This invention relates to the field of gas detection technology, and in particular to a gas measurement component and a gas measurement method. Background Technology

[0002] Beta-ray diffraction (BRD) is used to measure particulate matter (PM10, PM2.5, PM1.0) in ambient air. The BRD method works by attenuating the energy of beta rays as they pass through a filter membrane coated with particulate matter. The mass of the particulate matter can be calculated by measuring this attenuation. Currently, most particulate matter detection devices on the market are single-channel. A few multi-channel devices exist, but only 75% of the measurement cycle is used for sampling, while 25% is unavailable. This results in long measurement cycles and low sampling efficiency. Some multi-channel devices use twice the number of components as single-channel devices, which improves sampling efficiency but significantly increases equipment costs, hindering cost control. Summary of the Invention

[0003] One object of the present invention is to provide a gas measurement component and a gas measurement method, which can improve sampling efficiency and is economical and practical.

[0004] According to an embodiment of the present invention, a gas measurement assembly includes: a first sampling device, a second sampling device, a driving device, and a detection device. The first sampling device includes a first enrichment cavity through which a paper tape passes and a first gas channel through which gas flows in a direction perpendicular to the paper tape. The second sampling device includes a second enrichment cavity through which a paper tape passes and a second gas channel through which gas flows in a direction perpendicular to the paper tape. The first enrichment cavity and the second enrichment cavity are distributed along a travel trajectory and are adapted to allow a continuously extending paper tape to pass through the travel trajectory. The driving device is configured to drive the paper tape to move along the travel trajectory and to drive the paper tape located in the first sampling device and the paper tape located in the second sampling device to move independently of each other. The detection device is movable between a first position and a second position, wherein in the first position, the detection device is opposite to the first sampling device, and in the second position, the detection device is opposite to the second sampling device.

[0005] According to an embodiment of the present invention, the gas measurement component can improve sampling efficiency and is economical and practical.

[0006] In addition, the gas measuring component according to the above embodiments of the present invention may also have the following additional technical features:

[0007] In some embodiments, the driving device includes: a first moving wheel, a second moving wheel, and a third moving wheel; the first moving wheel is used to place the wound paper tape; the second moving wheel and the first moving wheel are arranged along the travel trajectory outside the first sampling device and the second sampling device, the second moving wheel is used to connect the paper tape and drive the paper tape to move along the travel trajectory; the third moving wheel is arranged along the travel trajectory between the first moving wheel and the second moving wheel, and is used to drive the paper tape located between the first sampling device and the second sampling device to move in a direction perpendicular to the paper tape.

[0008] In some embodiments, the driving device further includes a first tensioning wheel and a second tensioning wheel, the first tensioning wheel and the second tensioning wheel being distributed on both sides of the first sampling device along the travel trajectory, and the working surfaces of the first tensioning wheel and the second tensioning wheel being flush with the first enrichment cavity, for causing the paper tape located between the first tensioning wheel and the second tensioning wheel to pass through the first enrichment cavity in a direction parallel to the first enrichment cavity.

[0009] In some embodiments, the driving device further includes a third tensioning wheel and a fourth tensioning wheel, which are distributed on both sides of the second sampling device along the travel trajectory, and the working surfaces of the third tensioning wheel and the fourth tensioning wheel are flush with the second enrichment cavity, so as to allow the paper tape located between the third tensioning wheel and the fourth tensioning wheel to pass through the second enrichment cavity in a direction parallel to the second enrichment cavity.

[0010] In some embodiments, the travel trajectory is set as a straight line trajectory.

[0011] In some embodiments, the first enrichment cavity and the second enrichment cavity are arranged opposite each other in the left-right direction, and the driving device is distributed with the first sampling device and the second sampling device in the left-right direction.

[0012] In some embodiments, the first enrichment cavity has a first sampling point, the second enrichment cavity has a second sampling point, and the first sampling point and the second sampling point are staggered to offset the sampling spots formed by the paper tape along the width direction of the paper tape.

[0013] In some embodiments, the detection device includes a detection body and a first driving unit, the first driving unit being connected to the detection body and driving the detection body to move between a first position and a second position, wherein the detection body is opposite to the first sampling device in the first position and the detection body is opposite to the second sampling device in the second position.

[0014] In some embodiments, the detection body includes a radiation source and a detector, wherein the radiation source and the detector are distributed on opposite sides of the first sampling device at the first position, and the radiation source and the detector are distributed on opposite sides of the second sampling device at the second position.

[0015] In some embodiments, the detection device further includes a first track and a second track extending along the travel trajectory, with the radiation source located on the first track and the detector located on the second track.

[0016] In some embodiments, the first sampling device and the second sampling device include: a lower cover, an upper cover, and a cover driving unit. The upper cover is distributed opposite to the lower cover and can form a cavity for the paper tape to pass through. The cover driving unit is connected to the upper cover and is used to drive the upper cover to move in directions close to and away from the lower cover in order to clamp and release the paper tape.

[0017] In some embodiments, the cover driving unit includes a main driving rod and a driving wheel. The main driving rod is rotatably connected to the upper cover. The first end of the main driving rod is opposite to the driving wheel, and the second end of the main driving rod is opposite to the lower cover. The hinge point between the main driving rod and the upper cover is located between the first end and the second end. The driving unit can drive the first driving wheel so that the second end of the main driving rod presses against the lower cover and drives the upper cover away from the lower cover.

[0018] In some embodiments, the cover driving part further includes a reset member connected to the upper cover and having an elastic force that drives the upper cover closer to the lower cover.

[0019] In some embodiments, the cover driving unit further includes a secondary driving rod and a transmission shaft. The transmission shaft is rotatably connected to the upper cover and connected to the main driving rod. The first end of the secondary driving rod is connected to the transmission shaft, and the second end of the secondary driving rod is opposite to the lower cover. The secondary driving rod and the main driving rod are distributed on opposite sides of the upper cover. The main driving rod can drive the secondary driving rod so that the second end of the secondary driving rod presses against the lower cover and drives the upper cover away from the lower cover.

[0020] According to an embodiment of the present invention, a gas measurement method is applicable to the aforementioned gas measurement assembly, and the gas measurement method includes: Step 1: Control the detection device to measure the first background signal of the paper tape at the first sampling device; Step 2: After the first background signal measurement is completed, control the first sampling device to sample; control the detection device to measure the second background signal of the paper tape at the second sampling device; Step 3: After the second background signal measurement is completed, control the first sampling device and the second sampling device to sample. Step 4: After the first sampling device has completed sampling, control the detection device to measure the first particulate matter information at the first sampling device. Step 5: After the first particulate matter information measurement is completed, control the driving device to drive the paper tape to move to update the paper tape at the first sampling device, and control the detection device to measure the first background signal of the paper tape at the first sampling device. Step 6: After the first background signal measurement is completed, control the first sampling device to sample; control the detection device to measure the second particulate matter information at the second sampling device; Step 7: After confirming that the second particulate matter information measurement is completed, control the driving device to drive the paper tape to move to update the paper tape at the second sampling device, control the detection device to measure the second background signal of the paper tape at the second sampling device, and repeat step 3. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a gas measuring component according to an embodiment of the present invention.

[0022] Figure 2 This is a cross-sectional view of a gas measuring component according to an embodiment of the present invention.

[0023] Figure 3 This is a cross-sectional view of the first sampling device of a gas measurement assembly according to an embodiment of the present invention.

[0024] Figure 4 This is a cross-sectional view of the second sampling device of a gas measurement assembly according to an embodiment of the present invention.

[0025] Figure 5 This is a schematic flowchart of a gas measurement method according to an embodiment of the present invention.

[0026] Figure 6 This is a schematic flowchart of a gas measurement method according to another embodiment of the present invention.

[0027] Figure label: Gas measurement assembly 100, first sampling device 10, first enrichment chamber 101, first gas channel 102, first air inlet 1021, first air inlet pipe 1022, first flow channel 1023, first upper detection port 103, first lower detection port 104, first lower cover 11, first upper cover 12, first cover driving part 13, first main driving rod 131, first driving wheel 132, first auxiliary driving rod 133, first transmission shaft 134, first linear guide rail 135, second sampling device 20, second enrichment chamber 201, second gas channel 202, second air inlet 2021, second... Trachea 2022, second flow channel 2023, second upper detection port 203, second lower detection port 204, second lower cover 21, second upper cover 22, second cover drive unit 23, second main drive rod 231, second drive wheel 232, second auxiliary drive rod 233, second transmission shaft 234, second linear guide rail 235, first moving wheel 31, second moving wheel 32, third moving wheel 33, first tension wheel 34, second tension wheel 35, third tension wheel 36, fourth tension wheel 37, radioactive source 411, detector 412, first track 421, second track 422, paper tape 200. Detailed Implementation

[0028] The beta-ray diffraction method for particulate matter monitoring includes five steps: filter paper replacement, background measurement, sampling, measurement, and data calculation. In related technologies, the typical measurement cycle is 60 minutes. The blank paper tape is replaced in the first minute; blank paper tape measurement (I0) is performed from minutes 2 to 6; sampling (V) is performed from minutes 7 to 55; enriched paper tape measurement (I) is performed from minutes 55 to 60; and the measurement result (C) is output in the 60th minute.

[0029] The beta-ray method is based on the principle of beta-ray absorption and attenuation. The beta-ray absorption principle states that when a radioactive atomic nucleus undergoes beta decay, it emits beta particles. Beta particles are actually fast-moving charged particles with strong penetrating power. The phenomenon that their intensity gradually decreases as the thickness of the absorbing layer increases when they pass through an absorbing material of a certain thickness is called beta absorption. When the thickness of the absorbing material is much smaller than the range of the beta particles, the absorption of beta rays in the material is approximately: ,in, The initial intensity of the beta rays; The intensity of the beta rays after they pass through the intermediate medium; The mass absorption coefficient (attenuation coefficient) of beta rays. The unit is ; The mass thickness of the β-ray absorbing material, in units of .

[0030] Experiments show that for different absorbent substances, It increases slowly with increasing atomic number. For the same absorbent substance, It is related to radioactive energy.

[0031] The measurement process for particulate matter in related technologies is as follows: 1. Move the filter paper so that the filter paper at the enrichment position is a blank paper strip; 2. Data set of 5-minute measurements of β-ray intensity on a blank membrane. ,Will After processing with the Grubbs test, the following was obtained: ; 3. Air is pumped through the paper tape at a flow rate of 16.67 L / min to enrich the particulate matter in the air on the paper tape. The enrichment time is 50 min. The total standard volume of enriched gas passing through the filter paper is V. 4. Stop enrichment and measure the dataset of β-ray intensity of the standard membrane for 5 minutes. ,Will After processing with the Grubbs test, the following was obtained: ; 5. Calculate the concentration using the following formula.

[0032] Formula 1: Where M is the mass difference between the blank paper tape and the enriched paper tape at the enrichment site; S is the area of ​​the standard film, in units of... ; For mass thickness, unit .

[0033] Formula 2: .in, The mass absorption coefficient has an empirical value of 0.282. K is the correction factor.

[0034] Formula 3: Where S is the calibration membrane area, in units of... V represents the standard volume of the enriched gas, in units of... ; For quality thickness C represents mass concentration. .

[0035] Formula 4: Where S is the calibration membrane area. V represents the standard volume of the enriched gas, in units of... ; The mass absorption coefficient has an empirical value of 0.282. K is the correction factor; I represents the value of the blank paper tape measured by beta rays; I represents the value of the paper tape after being enriched with particulate matter by beta rays.

[0036] In addition, for the measurement methods of particulate matter, please refer to the Technical Guidelines for Automatic Monitoring of Particulate Matter (PM10 and PM2.5) in Ambient Air by β-ray Method (HJ1100 2020).

[0037] There are some shortcomings in the particulate matter measurement technology: 1. The particle size analysis capability of the technology is limited; 2. Simultaneous measurement of PM2.5 and PM10 is costly, energy-intensive, and requires a large space to accommodate multiple devices; 3. In the multi-channel solutions of the technology, the measurement cycle is time-consuming, with a maximum of 45 minutes of sampling per 1-hour measurement cycle, leaving 25% of the time unsampling, which cannot guarantee the authenticity and completeness of the ambient air monitoring results; 4. Some multi-channel designs use twice the number of devices as single-channel designs, failing to achieve the goal of reducing design costs.

[0038] In order to solve at least some of the technical problems in the related art, the present invention provides a gas measurement component and a gas measurement method.

[0039] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0040] like Figure 1 According to an embodiment of the present invention, a gas measurement component 100 is used to measure the concentration of particulate matter in a gas, comprising: a first sampling device 10, a second sampling device 20, a driving device, and a detection device. The first sampling device 10 and the second sampling device 20 can be used to measure the concentration of the same type of particulate matter, or they can be used to detect the concentration of different types of particulate matter, for example, to sample and measure PM10, PM2.5, or PM1.0.

[0041] The first sampling device 10 includes a first enrichment cavity 101 and a first gas channel 102. The first enrichment cavity 101 is for the paper tape 200 to pass through, and the first gas channel 102 is for the airflow to pass through the first enrichment cavity 101 in a direction perpendicular to the paper tape 200. That is, the paper tape 200 can pass through the first enrichment cavity 101, and the first gas channel 102 can guide the airflow to pass through the first enrichment cavity 101 in a direction perpendicular to the paper tape 200. During the process of the airflow passing through the first enrichment cavity 101, the particulate matter in the airflow will be enriched on the paper tape 200 located in the first enrichment cavity 101.

[0042] The second sampling device 20 includes a second enrichment chamber 201 and a second gas channel 202. The second enrichment chamber 201 is for the paper tape 200 to pass through, and the second gas channel 202 is for airflow to pass through the second enrichment chamber 201 in a direction perpendicular to the paper tape 200. That is, the paper tape 200 can pass through the second enrichment chamber 201, and the second gas channel 202 can guide the airflow to pass through the second enrichment chamber 201 in a direction perpendicular to the paper tape 200. During the process of the airflow passing through the second enrichment chamber 201, the particulate matter in the airflow will be enriched on the paper tape 200 located in the second enrichment chamber 201.

[0043] Among them, the first enrichment cavity 101 and the second enrichment cavity 201 travel along the trajectory (see attached). Figure 1 and Figure 2 The paper tape 200 is distributed along its extension trajectory and is suitable for continuous extension of the paper tape 200 along the travel trajectory. The travel trajectory can be a straight line, an arc, or other types of trajectory. It is only necessary to ensure that the same continuous extension of the paper tape 200 can pass through the first enrichment cavity 101 and the second enrichment cavity 201 respectively, and can move along the travel trajectory to update the sampling points in the paper tape 200 located in the first enrichment cavity 101 and the second enrichment cavity 201. That is to say, the same paper tape 200 can extend along the travel trajectory, and the same paper tape 200 passes through the first enrichment cavity 101 and the second enrichment cavity 201 during the extension process.

[0044] The driving device is configured to drive the paper tape 200 along a travel trajectory to update the paper tape 200 in the first enrichment cavity 101 and the second enrichment cavity 201. For example, the portion of the paper tape 200 containing particulate matter located in the first enrichment cavity 101 opposite to the first airflow channel can be updated to a blank portion of the paper tape 200; the portion of the paper tape 200 containing particulate matter located in the second enrichment cavity 201 opposite to the second airflow channel can be updated to a blank portion of the paper tape 200. Furthermore, the driving device is also configured to drive the paper tape 200 located in the first sampling device 10 and the paper tape 200 located in the second sampling device 20 to move independently of each other. That is, the driving device can update the paper tape 200 in the first sampling device 10 without affecting the paper tape 200 in the second sampling device 20; the driving device can also update the paper tape 200 in the second sampling device 20 without affecting the paper tape 200 in the first sampling device 10.

[0045] The detection device is used to detect particulate matter in the portion of the paper tape 200 located in the first sampling device 10. Through the detection device, the background signal of the paper tape 200 before particulate matter collection in the first sampling device 10 can be detected, as well as the particulate matter information of the paper tape 200 after particulate matter collection in the first sampling device 10 can be detected. The detection device is also used to detect particulate matter in the portion of the paper tape 200 located in the second sampling device 20. Through the detection device, the background signal of the paper tape 200 before particulate matter collection in the second sampling device 20 can be detected, as well as the particulate matter information of the paper tape 200 after particulate matter collection in the second sampling device 20 can be detected.

[0046] According to an embodiment of the present invention, the gas measuring component 100 can utilize a continuously extending paper tape 200 to complete sampling of the first sampling device 10 and the second sampling device 20, and drive the same paper tape 200 to move using a driving device. This simplifies the structure for driving the paper tape 200 and simplifies the gas measuring component 100. Furthermore, the portions of the paper tape 200 located in the first sampling device 10 and the portions located in the second sampling device 200 can be driven independently. Thus, when the paper tape 200 in the first sampling device 10 needs to be replaced, it will not affect the sampling and detection of the paper tape 200 in the second sampling device 20; similarly, when the paper tape 200 in the second sampling device 20 needs to be replaced, it will not affect the sampling and detection of the paper tape 200 in the first sampling device 10. Therefore, the process of replacing and detecting the paper tape 200 in one of the first sampling device 10 and the second sampling device 20 can be performed simultaneously with the other sampling process, thereby greatly improving the sampling time and efficiency during the detection process.

[0047] In order to enable the paper tape 200 located in the first sampling device 10 and the paper tape 200 located in the second sampling device 20 to move independently, the driving device can have a variety of different forms. For example, a first driving structure for driving the paper tape 200 can be provided between the first sampling device 10 and the second sampling device 20, and a second driving structure can be provided on the side of the second sampling device 20 away from the first sampling device 10. The first driving structure can drive the paper tape 200 to move along the aforementioned travel trajectory to update the paper tape 200 located in the first sampling device 10. The second driving structure can drive the paper tape 200 to move along the aforementioned travel trajectory to update the paper tape 200 located in the second sampling device 20.

[0048] like Figure 1 and Figure 2In some embodiments, the driving device includes: a first moving wheel 31, a second moving wheel 32, and a third moving wheel 33. The first moving wheel 31 is used to place the wound paper tape 200. The second moving wheel 32 and the first moving wheel 31 are arranged along the travel trajectory outside the first sampling device 10 and the second sampling device 20. The second moving wheel 32 is used to connect the paper tape 200 and drive the paper tape 200 to move along the travel trajectory. The third moving wheel 33 is arranged along the travel trajectory between the first moving wheel 31 and the second moving wheel 32 and is used to drive the paper tape 200 located between the first sampling device 10 and the second sampling device 20 to move in a direction perpendicular to the paper tape 200.

[0049] Specifically, taking the case where the second sampling device 20 is located downstream of the first sampling device 10 on the travel trajectory of the paper tape 200: When it is necessary to update the paper tape 200 at the first sampling device 10, the third moving wheel 33 can be moved in a direction perpendicular to the paper tape 200 and with the paper tape 200 taut. Under the driving action of the third moving wheel 33, the paper tape 200 at the first sampling device 10 moves along the travel trajectory. At the same time, the first moving wheel 31 can rotate to release part of the paper tape 200, thereby realizing the independent updating of the paper tape 200 at the first sampling device 10, while the position of the paper tape 200 at the second sampling device 20 remains unchanged. When it is necessary to update the paper tape 200 at the second sampling device 20, the second moving wheel 32 can be controlled to drive the paper tape 200 to move along the travel trajectory, while the third moving wheel 33 moves in a direction perpendicular to the paper tape 200 and releasing the paper tape 200. Under the combined action of the second moving wheel 32 and the third moving wheel 33, the paper tape 200 located at the second sampling device 20 moves along the travel trajectory, thereby realizing the independent updating of the paper tape 200 at the second sampling device 20, while the position of the paper tape 200 located at the first sampling device 10 remains unchanged.

[0050] As can be seen from the above, the paper tape 200 can be driven to move along the travel trajectory by the cooperation of the first moving wheel 31, the second moving wheel 32, and the third moving wheel 33. This allows the paper tape 200 located at the first sampling device 10 and the paper tape 200 located at the second sampling device 20 to move independently, enabling the first sampling device 10 and the second sampling device 200 to update their paper tapes independently. Furthermore, by using the third moving wheel 33 to move in a direction perpendicular to the paper tape 200, the paper tape 200 between the first sampling device 10 and the second sampling device 20 can be kept taut, improving the stability of the paper tape 200 during movement, thereby improving sampling efficiency and sampling stability.

[0051] like Figure 1 and Figure 2The driving device also includes a first tensioning roller 34 and a second tensioning roller 35. The first tensioning roller 34 and the second tensioning roller 35 are distributed on both sides of the first sampling device 10 along the travel trajectory, and the working surfaces of the first tensioning roller 34 and the second tensioning roller 35 are flush with the first enrichment cavity 101, so as to allow the paper tape 200 located between the first tensioning roller 34 and the second tensioning roller 35 to pass through the first enrichment cavity 101 in a direction parallel to the first enrichment cavity 101. By using the first tensioning roller 34 and the second tensioning roller 35, the paper tape 200 can be made to pass through the first enrichment cavity 101 in a direction parallel to the first enrichment cavity 101, thereby maintaining the stability of the fit between the paper tape 200 and the first sampling device 10, avoiding the influence of the gradual decrease in the radial dimension of the paper tape 200 roll during use, and realizing the stable movement of the paper tape 200 along the travel trajectory.

[0052] like Figure 1 and Figure 2 The driving device also includes a third tensioning roller 36 and a fourth tensioning roller 37, which are distributed on both sides of the second sampling device 20 along its travel trajectory. The working surfaces of the third tensioning roller 36 and the fourth tensioning roller 37 are flush with the second enrichment cavity 201, allowing the paper tape 200 located between the third tensioning roller 36 and the fourth tensioning roller 37 to pass through the second enrichment cavity 201 in a direction parallel to the second enrichment cavity 201. Using the third tensioning roller 36 and the fourth tensioning roller 37, the paper tape 200 can pass through the second enrichment cavity 201 in a direction parallel to the second enrichment cavity 201, thereby maintaining the stability of the fit between the paper tape 200 and the second sampling device 20, preventing the fit structure between the paper tape 200 and the second sampling device 20 from being affected by the gradual decrease in radial dimension during the use of the paper tape 200 roll, and achieving stable movement of the paper tape 200 along its travel trajectory.

[0053] like Figure 1 and Figure 2 The travel trajectory is set to a straight line. The first enrichment cavity 101 and the second enrichment cavity 201 can be opposite each other in a straight line, and the driving device can drive the paper tape 200 to move in a straight line, thereby simplifying the driving structure of the paper tape 200.

[0054] like Figures 2 to 4 The first enrichment cavity 101 and the second enrichment cavity 201 are arranged opposite each other in the left-right direction, and the driving device and the first sampling device 10 and the second sampling device 20 are distributed in the left-right direction.

[0055] Combined with appendix Figure 1 and Figure 2The first tensioning roller 34, the first sampling device 10, the second tensioning roller 35, the third moving roller 33, the third tensioning roller 36, the second sampling device 20, and the fourth tensioning roller 37 are distributed from left to right. The first moving roller 31 is lower than the first tensioning roller 34, and the second moving roller 32 is lower than the fourth tensioning roller 37. The upper edge of the working surface of the first tensioning roller 34 is approximately tangent to the plane containing the lower surface of the first enrichment cavity 101; the lower edge of the working surface of the second tensioning roller 35 is approximately tangent to the plane containing the lower surface of the first enrichment cavity 101; the lower edge of the working surface of the third tensioning roller 36 is approximately tangent to the plane containing the lower surface of the second enrichment cavity 201; and the upper edge of the working surface of the fourth tensioning roller 37 is approximately tangent to the plane containing the lower surface of the second enrichment cavity 201.

[0056] During use, the wound paper tape 200 forms a roll and is set on the first moving wheel 31. When the paper tape 200 is driven by the driving device, it can rotate. One end of the paper tape 200 passes through the first tensioning wheel 34, the first sampling device 10, the second tensioning wheel 35, the third moving wheel 33, the third tensioning wheel 36, the second sampling device 20 and the fourth tensioning wheel 37, and then connects to the second moving wheel 32, and can be driven by the second moving wheel 32. Specifically, the paper tape 200 passes over the first tensioning roller 34 from the upper left side; the paper tape 200 passes over the first sampling device 10 from the first enrichment cavity 101; the paper tape 200 passes over the second tensioning roller 35 from the lower right side; the paper tape 200 passes over the third moving roller 33 from the upper side; the paper tape 200 passes over the second tensioning roller 35 from the lower left side of the third tensioning roller 36; the paper tape 200 passes over the second sampling device 20 from the second enrichment cavity 201; and the paper tape 200 passes over the fourth tensioning roller 37 from the upper right side and connects to the second moving roller 32.

[0057] The paper tape 200 is wound around the first moving wheel 31, and the other end of the paper tape 200 is connected to the waste paper roll located on the second moving wheel 32. During the sampling process, the first sampling device 10 clamps the paper tape 200 at the corresponding position, and the second sampling device 20 clamps the paper tape 200 at the corresponding position during the sampling process.

[0058] like Figure 1 and Figure 2 When the paper tape 200 needs to be replaced at the first sampling device 10, the first sampling device 10 releases the paper tape 200 at the corresponding position, and the second sampling device 20 clamps the paper tape 200 at the corresponding position. The paper tape 200 at the corresponding position of the second sampling device 20 cannot move. When the third moving wheel 33 moves upward, it will drive the paper tape 200 at the first sampling device 10 to move to the right. At the same time, the first moving wheel 31 rotates to release part of the paper tape 200, thereby realizing the replacement of the paper tape 200 at the first sampling device 10. When the paper tape 200 needs to be replaced at the second sampling device 20, the second sampling device 20 releases the paper tape 200 at the corresponding position, the first sampling device 10 clamps the paper tape 200 at the corresponding position, the paper tape 200 at the corresponding position of the first sampling device 10 cannot move, the second moving wheel 32 rotates, driving the paper tape 200 at the corresponding position of the second sampling device 20 to move to the right, and at the same time driving the third moving wheel 33 to move downward, releasing the paper tape 200 located between the first sampling device 10 and the second sampling device 20, thereby realizing the paper tape 200 update at the second sampling device 20.

[0059] The first movable wheel 31 may be equipped with an elastic structure to limit its rotation. This elastic structure can be a torsion spring, etc. For example, refer to the attached diagram. Figure 1 and Figure 2 The elastic structure can have an elastic force that restricts the first moving wheel 31 from rotating clockwise; the second moving wheel 32 can be equipped with a corresponding driving structure such as a stepper motor or a servo motor to drive the second moving wheel 32 along the attached... Figure 1 and Figure 2 The first moving wheel 31, the second moving wheel 32, the third moving wheel 33, the first tensioning wheel 34, the second tensioning wheel 35, the third tensioning wheel 36, and the fourth tensioning wheel 37 can all be configured to rotate around their respective axes.

[0060] like Figure 1 In some embodiments, the first enrichment cavity 101 has a first sampling point, and the second enrichment cavity 201 has a second sampling point, with the first and second sampling points being staggered. The sampling spots formed by the paper tape 200 after sampling in the first sampling device 10 and the sampling spots formed by the paper tape 200 after sampling in the second sampling device 20 are staggered along the width direction of the paper tape 200. This avoids interference between the particles collected by the paper tape 200 in the first sampling device 10 and the particles collected in the second sampling device 20, thereby improving the accuracy of the detection results.

[0061] This invention achieves efficient operation of the detection device by placing two parallel, staggered sampling systems, forming two parallel rows of sampling points that do not interfere with each other during the measurement process. The invention uses two sampling systems to simultaneously measure two particle sizes; the detection device moves between the two sampling systems, forming two parallel sampling spots.

[0062] Since the sampling process in the gas measurement component 100 takes a considerable amount of time, and the detection times of the first sampling device 10 and the second sampling device 20 can be staggered, the first sampling device 10 and the second sampling device 20 in this invention can share a single detection structure. When the first sampling device 10 is performing the sampling process, the detection device can be used to detect the paper tape 200 corresponding to the second sampling device 20; when the second sampling device 20 is performing the sampling process, the detection device can be used to detect the paper tape 200 corresponding to the first sampling device 10.

[0063] Of course, the first sampling device 10 and the second sampling device 20 in this invention can also be respectively provided with detection structures. This invention mainly uses a set of detection structures to realize the detection of the paper tape 200 corresponding to the first sampling device 10 and the paper tape 200 corresponding to the second sampling device 20. This is only some embodiments of this invention and is not a limitation on the scope of protection of this invention.

[0064] like Figure 1 and Figure 2 In some embodiments, the detection device can move between a first position and a second position, where the detection device is opposite to the first sampling device 10 and the detection device is opposite to the second sampling device 20 in the second position. The detection device is used to detect particulate matter enriched on the paper tape 200 at the first sampling device 10 and the second sampling device 20. The first driving unit can drive the detection body to achieve the purpose of detecting the first sampling device 10 and the second sampling device 20 with the same detection device, thereby simplifying the structure of the gas measurement assembly 100 and making full use of the particulate matter sampling time to improve detection and sampling efficiency.

[0065] like Figure 1 and Figure 2 The detection device includes a detection body and a first driving unit. The first driving unit is connected to the detection body and drives the detection body to move between a first position and a second position. In the first position, the detection body is opposite to the first sampling device 10, and in the second position, the detection body is opposite to the second sampling device 20.

[0066] This invention employs dual-channel sampling and single-detection device measurement, using a moving detection device to measure the enriched samples from both channels.

[0067] The detection unit includes a radiation source 411 and a detector 412. At a first position, the radiation source 411 and detector 412 are distributed on opposite sides of the first sampling device 10. At a second position, the radiation source 411 and detector 412 are distributed on opposite sides of the second sampling device 20. The enrichment of particulate matter in the paper tape 200 can be detected by utilizing the β-rays emitted by the radiation source 411 and the attenuation of the β-rays detected by the detector 412, thereby obtaining the particulate matter content in the gas introduced into the gas measuring component 100, achieving high gas detection accuracy.

[0068] The detection device also includes a first track 421 and a second track 422 extending along the travel trajectory. The radiation source 411 is located on the first track 421, and the detector 412 is located on the second track 422. The first track 421 and the second track 422 can be used to guide the movement of the radiation source 411 and the detector 412, respectively, which can improve the stability of the movement of the detection subject, optimize the performance of the detection device, improve the accuracy of the detection results, and improve the detection efficiency.

[0069] like Figures 1 to 4 In some embodiments, the first sampling device 10 and the second sampling device 20 include: a lower cover, an upper cover, and a cover driving unit. The upper cover and the lower cover are distributed opposite to each other and can form a cavity for the paper tape 200 to pass through. Specifically, a first enrichment cavity 101 for the paper tape 200 to pass through can be formed between the upper cover and the lower cover of the first sampling device 10; a second enrichment cavity 201 for the paper tape 200 to pass through can be formed between the upper cover and the lower cover of the second sampling device 20. The cover driving unit is connected to the upper cover and is used to drive the upper cover to move in directions closer to and farther from the lower cover to clamp and release the paper tape 200. During sampling and detection, the cooperation of the upper and lower covers can form a relatively closed cavity (relative to the separation of the upper and lower covers) between them to facilitate sampling of particulate matter in the gas and avoid the influence of the external environment on the detection accuracy. When it is necessary to move the paper tape 200, the upper and lower covers can be driven to separate, releasing the clamping force on the paper tape 200 and facilitating its movement.

[0070] When it is necessary to release the grip on the paper tape 200, the upper cover can be driven away from the lower cover by the cover driving part; when it is necessary to grip the paper tape 200, the upper cover and the lower cover can be closed.

[0071] like Figure 3 and Figure 4The cover driving unit may include a main drive rod and a drive wheel. The main drive rod is rotatably connected to the upper cover. The first end of the main drive rod is opposite to the drive wheel, and the second end of the main drive rod is opposite to the lower cover. The hinge point between the main drive rod and the upper cover is located between the first and second ends of the main drive rod. The drive wheel can drive the first end of the main drive rod to move and cause the second end of the main drive rod to press against the lower cover, driving the upper cover away from the lower cover. Specifically, the drive wheel can be an eccentric wheel or a cam structure. The drive wheel is opposite to the first end of the main drive rod and can press against and release the first end of the main drive rod by rotating. When the drive wheel presses against and drives the main drive rod, it can cause the main drive rod to rotate, causing the second end of the main drive rod to press against the lower cover and causing the upper cover to move away from the lower cover.

[0072] Therefore, when it is necessary to drive the upper cover away from the lower cover, the main drive rod can be rotated by the drive wheel. The second end of the main drive rod will press against the lower cover, thereby using a lever to drive the upper cover away from the lower cover. The drive structure is simple and reliable.

[0073] In addition, the cover drive unit also includes a secondary drive rod and a transmission shaft. The transmission shaft is rotatably connected to the upper cover and to the main drive rod. The first end of the secondary drive rod is connected to the transmission shaft, and the transmission shaft and secondary drive rod can rotate with the main drive rod. The second end of the secondary drive rod is opposite to the lower cover. The secondary drive rod and the main drive rod are distributed on opposite sides of the upper cover. Power is transmitted to the main drive rod and the secondary drive rod by the drive wheel. The second ends of the main drive rod and the secondary drive rod press against the lower cover. The main drive rod can drive the secondary drive rod so that its second end presses against the lower cover and drives the upper cover away from the lower cover. In other words, the main drive rod and the secondary drive rod located on opposite sides of the upper cover can press against the lower cover, achieving stable movement of the upper cover relative to the lower cover. Power can be transmitted using the transmission shaft, causing the main drive rod and the secondary drive rod to rotate synchronously and press against the lower cover. This simultaneously applies a force away from the lower cover to opposite sides of the upper cover, achieving stable separation of the upper cover from the lower cover and improving the stability of the upper cover during movement.

[0074] Additionally, the first sampling device 10 and the second sampling device 20 may also include linear guides, which may be disposed on the lower cover and extend in a direction away from the lower cover (see attached diagram). Figure 3 and Figure 4 The upper cover (in the vertical direction) engages with linear guide rails and moves towards and away from the lower cover. This utilizes the linear guide rails to guide the upper cover's stable movement, improving its stability. One or at least two linear guide rails can be provided on the lower cover, for example, four linear guide rails evenly spaced circumferentially on the lower cover.

[0075] The cover driving unit also includes a reset member, which is connected to the upper cover and has an elastic force that drives the upper cover closer to the lower cover. The reset member can be used to drive the upper cover to reset, and the upper cover can automatically move towards the lower cover to clamp the paper tape 200. When it is necessary to release the clamping of the paper tape 200, the cover driving unit can be used to drive the upper cover away from the lower cover; when it is necessary to clamp the paper tape 200, the driving force of the cover driving unit on the upper cover can be released, and under the action of the elastic force of the reset member, the upper cover can move towards the lower cover, and the upper cover and the lower cover cooperate to clamp and position the paper tape 200.

[0076] The upper cover, lower cover, and cover driving part in the above embodiments are included in the first sampling device 10 and the second sampling device 20. The first sampling device 10 and the second sampling device 20 will be described separately below.

[0077] 1. First sampling device 10 like Figure 3 The first sampling device 10 includes a first upper cover 12, a first lower cover 11, and a first cover driving part 13. The first upper cover 12 and the second lower cover 11 are distributed opposite to each other. A first enrichment cavity 101 for paper tape 200 to pass through can be formed between the first upper cover 12 and the first lower cover 11. The first cover driving part 13 is connected to the first upper cover 12 and is used to drive the first upper cover 12 to move closer to and away from the first lower cover 11 in order to clamp and release the paper tape 200 located in the first enrichment cavity 101. The first upper cover 12 is provided with a first upper detection port 103, and the first lower cover 11 is provided with a first lower detection port 104. The first upper detection port 103 and the first lower detection port 104 are opposite to each other and distributed on opposite sides of the first enrichment cavity 101. Additionally, the first gas channel 102 includes a first air inlet 1021, a first air inlet pipe 1022, and a first flow channel 1023. The first flow channel 1023 is located on the first upper cover 12 and connects to the first upper detection port 103. Gas can enter the first air inlet pipe 1022 through the first air inlet 1021, and then enter the first flow channel 1023 along the first air inlet 1021. Gas then enters the first upper detection port 103 through the first flow channel 1023, and exits from the first lower detection port 104 after passing through the paper tape 200, thereby achieving sampling by the first sampling device 10. When the detection body detects the paper tape 200 corresponding to the first sampling device 10, the radiation source 411 can be positioned on the side of the first upper cover 12 away from the first lower cover 11 and opposite the first upper detection port 103. The detector 412 can be positioned on the side of the first lower cover 11 away from the first upper cover 12 and opposite the first lower detection port 104.

[0078] The first cover driving part 13 may include a first main driving rod 131 and a first driving wheel 132. The first main driving rod 131 is rotatably connected to the first upper cover 12. The first end of the first main driving rod 131 is opposite to the first driving wheel 132, and the second end of the first main driving rod 131 is opposite to the first lower cover 11. The hinge point between the first main driving rod 131 and the first upper cover 12 is located between the first end and the second end of the first main driving rod 131. The first driving wheel 132 can drive the first end of the first main driving rod 131 to move and cause the second end of the first main driving rod 131 to press against the first lower cover 11, driving the first upper cover 12 away from the first lower cover 11. Specifically, the first drive wheel 132 can be an eccentric wheel or a cam structure. The first drive wheel 132 is opposite to the first end of the first main drive rod 131, and can press against and release the first end of the first main drive rod 131 by rotating. When the first drive wheel 132 presses against and drives the first main drive rod 131, it can cause the first main drive rod 131 to rotate and cause the second end of the first main drive rod 131 to press against the first lower cover 11, and cause the first upper cover 12 to move away from the first lower cover 11.

[0079] In addition, the first cover drive unit 13 also includes a first auxiliary drive rod 133 and a first transmission shaft 134. The first transmission shaft 134 is rotatably connected to the first upper cover 12 and is connected to the first main drive rod 131. The first end of the first auxiliary drive rod 133 is connected to the first transmission shaft 134. The first transmission shaft 134 and the first auxiliary drive rod 133 can rotate with the first main drive rod 131. The second end of the first auxiliary drive rod 133 is opposite to the first lower cover 11. The first auxiliary drive rod 133 and the first main drive rod 131 are distributed on opposite sides of the first upper cover 12. In this way, the power is transmitted to the first main drive rod 131 and the first auxiliary drive rod 133 by the drive of the first drive wheel 132. The second end of the first main drive rod 131 presses against the first lower cover 11. The first main drive rod 131 can drive the first auxiliary drive rod 133 to press the second end of the first auxiliary drive rod 133 against the first lower cover 11, and drive the first upper cover 12 away from the first lower cover 11. That is, the first main drive rod 131 and the first auxiliary drive rod 133, located on opposite sides of the first upper cover 12, can press against the first lower cover 11, realizing the stable movement of the first upper cover 12 relative to the first lower cover 11. Power can be transmitted by the first transmission shaft 134, so that the first main drive rod 131 and the first auxiliary drive rod 133 rotate synchronously and press against the first lower cover 11. In this way, forces away from the first lower cover 11 are applied to opposite sides of the first upper cover 12 at the same time, realizing the stable separation of the first upper cover 12 from the first lower cover 11, and improving the stability of the first upper cover 12 during movement.

[0080] Additionally, the first sampling device 10 may also include a first linear guide rail 135. The first linear guide rail 135 may be disposed on the first lower cover 11 and extend in a direction away from the first lower cover 11 (refer to the up and down direction in the attached figures). The first upper cover 12 cooperates with the first linear guide rail 135 and moves in directions approaching and away from the first lower cover 11. Thus, the first linear guide rail 135 guides the first upper cover 12 to move stably, improving the stability of the movement of the first upper cover 12. One or at least two first linear guide rails 135 may be disposed on the first lower cover 11, for example, four first linear guide rails 135 may be evenly distributed circumferentially around the first lower cover 11.

[0081] The first cover driving unit 13 also includes a first reset member, which is connected to the first upper cover 12 and has an elastic force to drive the first upper cover 12 closer to the first lower cover 11. The first reset member can be used to drive the first upper cover 12 to reset, and the first reset member can be used to realize the automatic movement of the first upper cover 12 toward the first lower cover 11 to clamp the paper tape 200. When it is necessary to release the clamping of the paper tape 200, the first cover driving unit 13 can be used to drive the first upper cover 12 away from the first lower cover 11. When it is necessary to clamp the paper tape 200, the driving force of the first cover driving unit 13 on the first upper cover 12 can be released. Under the action of the elastic force of the first reset member, the first upper cover 12 can move toward the first lower cover 11, and the first upper cover 12 and the first lower cover 11 cooperate to clamp and position the paper tape 200.

[0082] 2. Second sampling device 20 like Figure 4The second sampling device 20 includes a second upper cover 22, a second lower cover 21, and a second cover driving part 23. The second upper cover 22 and the second lower cover 21 are distributed opposite to each other. A second enrichment cavity 201 for paper tape 200 to pass through can be formed between the second upper cover 22 and the second lower cover 21. The second cover driving part 23 is connected to the second upper cover 22 and is used to drive the second upper cover 22 to move closer to and away from the second lower cover 21 to clamp and release the paper tape 200 located in the second enrichment cavity 201. The second upper cover 22 is provided with a second upper detection port 203, and the second lower cover 21 is provided with a second lower detection port 204. The second upper detection port 203 and the second lower detection port 204 are opposite to each other and distributed on opposite sides of the second enrichment cavity 201. Additionally, the second gas channel 202 includes a second air inlet 2021, a second air inlet pipe 2022, and a second flow channel 2023. The second flow channel 2023 is located on the second upper cover 22 and connects to the second upper detection port 203. Gas can enter the second air inlet pipe 2022 through the second air inlet 2021, and then enter the second flow channel 2023 along the second air inlet 2021. Gas then enters the second upper detection port 203 through the second flow channel 2023, and exits from the second lower detection port 204 after passing through the paper tape 200, thereby achieving sampling by the second sampling device 20. When the detection body detects the paper tape 200 corresponding to the second sampling device 20, the radiation source 411 can be positioned on the side of the second upper cover 22 away from the second lower cover 21 and opposite the second upper detection port 203. The detector 412 can be positioned on the side of the second lower cover 21 away from the second upper cover 22 and opposite the second lower detection port 204.

[0083] The second cover driving part 23 may include a second main driving rod 231 and a second driving wheel 232. The second main driving rod 231 is rotatably connected to the second upper cover 22. The first end of the second main driving rod 231 is opposite to the second driving wheel 232, and the second end of the second main driving rod 231 is opposite to the second lower cover 21. The hinge point between the second main driving rod 231 and the second upper cover 22 is located between the first end and the second end of the second main driving rod 231. The second driving wheel 232 can drive the first end of the second main driving rod 231 to move and cause the second end of the second main driving rod 231 to press against the second lower cover 21, thereby driving the second upper cover 22 away from the second lower cover 21. Specifically, the second drive wheel 232 can be an eccentric wheel or a cam structure. The second drive wheel 232 is opposite to the first end of the second main drive rod 231, and can press against and release the first end of the second main drive rod 231 by rotating. When the second drive wheel 232 presses against and drives the second main drive rod 231, it can cause the second main drive rod 231 to rotate and cause the second end of the second main drive rod 231 to press against the second lower cover 21, and cause the second upper cover 22 to move away from the second lower cover 21.

[0084] In addition, the second cover drive unit 23 also includes a second auxiliary drive rod 233 and a second transmission shaft 234. The second transmission shaft 234 is rotatably connected to the second upper cover 22 and is connected to the second main drive rod 231. The first end of the second auxiliary drive rod 233 is connected to the second transmission shaft 234. The second transmission shaft 234 and the second auxiliary drive rod 233 can rotate with the second main drive rod 231. The second end of the second auxiliary drive rod 233 is opposite to the second lower cover 21. The second auxiliary drive rod 233 and the second main drive rod 231 are distributed on opposite sides of the second upper cover 22. In this way, the power is transmitted to the second main drive rod 231 and the second auxiliary drive rod 233 by the drive of the second drive wheel 232. The second end of the second main drive rod 231 presses against the second lower cover 21. The second main drive rod 231 can drive the second auxiliary drive rod 233 to press the second end of the second auxiliary drive rod 233 against the second lower cover 21, and drive the second upper cover 22 away from the second lower cover 21. That is, the second main drive rod 231 and the second auxiliary drive rod 233, located on opposite sides of the second upper cover 22, can press against the second lower cover 21, realizing stable movement of the second upper cover 22 relative to the second lower cover 21. Power can be transmitted using the second transmission shaft 234, so that the second main drive rod 231 and the second auxiliary drive rod 233 rotate synchronously and press against the second lower cover 21. In this way, forces away from the second lower cover 21 are applied to opposite sides of the second upper cover 22 simultaneously, realizing stable separation of the second upper cover 22 from the second lower cover 21, and improving the stability of the second upper cover 22 during movement.

[0085] Additionally, the second sampling device 20 may also include a second linear guide rail 235. The second linear guide rail 235 may be disposed on the second lower cover 21 and extend in a direction away from the second lower cover 21 (refer to the up and down direction in the attached figures). The second upper cover 22 cooperates with the second linear guide rail 235 and moves in directions approaching and away from the second lower cover 21. This allows the second linear guide rail 235 to guide the second upper cover 22 to move stably, improving the stability of the movement of the second upper cover 22. One or at least two second linear guide rails 235 may be disposed on the second lower cover 21, for example, four second linear guide rails 235 may be evenly distributed circumferentially around the second lower cover 21.

[0086] The second cover driving unit 23 also includes a second reset member, which is connected to the second upper cover 22 and has an elastic force that drives the second upper cover 22 closer to the second lower cover 21. The second reset member can be used to drive the second upper cover 22 to reset, and the second reset member can be used to enable the second upper cover 22 to automatically move towards the second lower cover 21 to clamp the paper tape 200. When it is necessary to release the clamping of the paper tape 200, the second cover driving unit 23 can be used to drive the second upper cover 22 away from the second lower cover 21. When it is necessary to clamp the paper tape 200, the driving force of the second cover driving unit 23 on the second upper cover 22 can be released. Under the action of the elastic force of the second reset member, the second upper cover 22 can move towards the second lower cover 21, and the second upper cover 22 and the second lower cover 21 cooperate to clamp and position the paper tape 200.

[0087] like Figure 5 According to an embodiment of the present invention, a gas measurement method applicable to the aforementioned gas measurement assembly is provided. The gas measurement method includes: Step 1: Control the detection device to measure the first background signal of the paper tape at the first sampling device.

[0088] In conjunction with the foregoing, the detection device may include two sampling structures corresponding to the first sampling device and the second sampling device respectively, or it may include a single sampling structure shared by the first and second sampling devices. This invention primarily uses the example of the first and second sampling devices sharing a single sampling structure, which is not intended to limit the scope of protection of this invention.

[0089] When the first sampling device and the second sampling device share the detection body, in step 1, the detection body is moved to be opposite to the first sampling device, the radiation source of the detection body is controlled to emit beta rays, and the detector is controlled to detect the beta ray intensity data that penetrates the blank paper tape located at the first acquisition device, so as to measure the first background signal of the paper tape located at the first sampling device.

[0090] Step 2: After the first background signal measurement is completed, control the first sampling device to sample; control the detection device to measure the second background signal of the paper tape at the second sampling device.

[0091] After the first background signal measurement is completed, the detection body is moved to be opposite the second sampling device. The radiation source of the detection body emits beta rays, and the detector detects the intensity data of the beta rays penetrating the blank paper tape located at the second sampling device, thus measuring the second background signal of the paper tape at the second sampling device. Simultaneously, airflow is controlled through the first gas channel. As the gas passes through the first gas channel, particulate matter in the gas accumulates on the paper tape opposite the first gas channel. This allows for simultaneous detection of the background signal of the paper tape at the second sampling device and sampling of the paper tape at the first sampling device, increasing the percentage of sampling time occupied by the gas measurement component.

[0092] Step 3: After the second background signal measurement is completed, control the first sampling device and the second sampling device to sample.

[0093] After the second background signal is measured, the airflow is controlled to pass through the first gas channel. As the gas passes through the first gas channel, particulate matter in the gas will accumulate on the paper tape opposite to the first gas channel. Simultaneously, the airflow is controlled to pass through the second gas channel. As the gas passes through the second gas channel, particulate matter in the gas will accumulate on the paper tape opposite to the second gas channel. This allows sampling of the paper tape at the first sampling device and sampling of the paper tape at the second sampling device to be performed simultaneously.

[0094] Step 4: After the first sampling device completes sampling, control the detection device to measure the first particulate matter information at the first sampling device.

[0095] After the first sampling device completes sampling, for example, when the sampling time of the first sampling device reaches a preset time, or when the volume of gas transported through the first gas channel reaches a preset volume, the sampling of the first sampling device can be considered complete. The detection body is then moved to a position opposite the first sampling device, and its radiation source emits beta rays. The detector then detects the intensity data of the beta rays penetrating the paper tape sampled at the location of the first sampling device, thus measuring the first particulate matter information on the paper tape located at the first sampling device. At this point, when the gas continues to pass through the second gas channel, the particulate matter in the gas will accumulate on the paper tape opposite the second gas channel. This allows the second sampling device to continue sampling while the first sampling device is detecting particulate matter at the corresponding location, increasing the percentage of sampling time occupied by the gas measurement component.

[0096] Step 5: After the first particulate matter information measurement is completed, control the drive device to drive the paper tape to move to update the paper tape at the first sampling device, and control the detection device to measure the first background signal of the paper tape at the first sampling device.

[0097] After the first particulate matter measurement is completed, the driving device can drive the paper tape to move, causing the paper tape corresponding to the first sampling device to move, thereby updating the portion of the paper tape corresponding to the first gas channel, and updating the paper tape corresponding to the first gas channel to a blank paper tape. After the paper tape at the position corresponding to the first gas channel is updated, the radiation source of the detection body is controlled to emit beta rays, and the detector is controlled to detect the intensity data of the beta rays penetrating the blank paper tape located at the first acquisition device, so as to measure the first background signal of the paper tape located at the first sampling device. At this time, the gas continues to be controlled to pass through the second gas channel, and the particulate matter in the gas will be enriched on the paper tape opposite the second gas channel. This allows the second sampling device to continue sampling while updating the paper tape at the position corresponding to the first sampling device, increasing the percentage of sampling time occupied by the gas measurement component.

[0098] Step 6: After the first background signal measurement is completed, control the first sampling device to sample; control the detection device to measure the second particulate matter information at the second sampling device.

[0099] After the measurement of the first background signal is completed, the detection body is moved to be opposite the second sampling device. The radiation source of the detection body emits beta rays, and the detector detects the intensity data of the beta rays penetrating the blank paper tape located at the second sampling device, thereby measuring the second particulate matter information on the paper tape located at the second sampling device. Simultaneously, airflow is controlled to pass through the first gas channel. As the gas passes through the first gas channel, the particulate matter in the gas accumulates on the paper tape opposite the first gas channel. This allows for simultaneous sampling of the paper tape at both the second and first sampling devices, increasing the percentage of sampling time occupied by the gas measurement component.

[0100] Step 7: After confirming that the second particulate matter information measurement is completed, control the drive device to drive the paper tape to move to update the paper tape at the second sampling device, and control the detection device to measure the second background signal of the paper tape at the second sampling device; repeat step 3.

[0101] After the second particulate matter information measurement is completed, the driving device can drive the paper tape to move, causing the paper tape corresponding to the second sampling device to move, thereby updating the portion of the paper tape corresponding to the second gas channel, and updating the paper tape corresponding to the second gas channel to a blank paper tape. After the paper tape at the position corresponding to the second gas channel is updated, the radiation source of the detection body is controlled to emit beta rays, and the detector is controlled to detect the beta ray intensity data penetrating the blank paper tape located at the second acquisition device, so as to measure the second background signal of the paper tape located at the second sampling device. At this time, the gas continues to be controlled to pass through the first gas channel, and the particulate matter in the gas will be enriched on the paper tape opposite to the first gas channel. This allows the first sampling device to continue sampling while the paper tape at the position corresponding to the second sampling device is updated, increasing the percentage of sampling time occupied by the gas measurement component.

[0102] After the second background signal is measured, the airflow is controlled to pass through the first gas channel. As the gas passes through the first gas channel, particulate matter in the gas will accumulate on the paper tape opposite to the first gas channel. Simultaneously, the airflow is controlled to pass through the second gas channel. As the gas passes through the second gas channel, particulate matter in the gas will accumulate on the paper tape opposite to the second gas channel. This allows sampling of the paper tape at the first sampling device and sampling of the paper tape at the second sampling device to be performed simultaneously.

[0103] According to the gas measurement method of the present invention, the second sampling device can continue to sample while the first sampling device performs paper tape updating, particulate matter sampling, background information detection, and particulate matter detection; the first sampling device can continue to sample while the second sampling device performs paper tape updating, particulate matter sampling, background information detection, and particulate matter detection; and the first and second sampling devices can also sample simultaneously, which can increase the proportion of sampling time in the gas measurement method, increase the sampling duration, and improve the detection efficiency.

[0104] The following is a reference to the appendix. Figure 6 This invention describes gas measurement methods according to some specific embodiments. For example... Figure 1 As shown, the first sampling device is located to the left of the second sampling device.

[0105] 1. On a blank paper tape, move the detection device to the upper and lower detection ports of the first sampling device. At time t0 (min 0), start measuring the background signal P10 of the paper tape corresponding to the first sampling device. At time t1 (min 0-5), the second sampling device waits during the measurement of the background signal of the first sampling device.

[0106] 2. The first sampling device begins enrichment sampling at time t2 (min 5-10) with a flow rate of 16.67 L / min. The detection device is moved to the right of the second sampling device and aligned with the upper and lower detection ports of the second sampling device at time t3 (min 6). The detection device measures the background signal P20 in the paper tape located between the upper and lower detection ports of the second sampling device at time t4 (min 5-10).

[0107] 3. The first and second sampling devices enrich simultaneously (from 10 to 50 minutes).

[0108] 4. Move the detection device to the first sampling device and align it with the upper and lower detection ports of the first sampling device. Start measuring the particulate matter signal P11 of the paper tape at the first sampling device at time t5 (50 min). At time t6 (50-55 min), calculate the particulate matter concentration C1 in the gas passing through the first sampling device based on the measurement results of the detection device at the first sampling device. The second sampling device continues to enrich and sample.

[0109] 5. By rotating the first horizontal moving wheel clockwise and moving the third moving wheel upward, the sampling spots that have been enriched in the first sampling device are removed from the paper tape and replaced with a blank paper tape. At time t7 (55 min), the next round of background measurement P12 is performed. At time t8 (55-60 min), the second sampling device continues to enrich.

[0110] 6. The first sampling device samples, and the detection device is moved to a position opposite to the sampling point of the second sampling device. At time t8, the particulate matter information P21 of the paper tape located at the second sampling device is measured (60-65 min). The gas concentration C2 is calculated based on the particulate matter measurement results of the paper tape at the second sampling device.

[0111] 7. Control the second moving wheel to rotate clockwise and control the third moving wheel to move downwards at time T9, removing the sampling spots that have accumulated in the second sampling device from the paper tape and updating it to a blank paper tape. Begin measuring the background information P22 for the next round of the second sampling device at time t10.

[0112] 8. Skip to step 3: The first sampling device and the second sampling device enrich simultaneously.

[0113] 9. According to statistics, in the first round, the sampling time of the first sampling device was 50 minutes and the sampling time of the second sampling device was 55 minutes; in the second round, the sampling time of the first sampling device was 50 minutes and the sampling time of the second sampling device was 55 minutes.

[0114] The innovative enrichment structure design of this invention changes the paper tape's movement from only lateral to include longitudinal movement, enabling the simultaneous enrichment of two gas streams using a single roll of paper tape without mutual interference. This improves data validity.

[0115] This innovative gas measurement method, based on conventional methods, increases the mobility of the detection device by staggered sampling and achieves simultaneous enrichment and staggered measurement of two channels without interference through sophisticated business logic.

[0116] More accurate size distribution: Multi-channel particulate matter analysis provides more detailed size distribution information because it can simultaneously detect and count particles within multiple different size ranges. This advantage helps to more accurately understand the size distribution and composition of particulate matter.

[0117] More comprehensive data: By using a multi-channel particulate matter analyzer, more comprehensive particulate matter data can be obtained. Particulate matter in different size ranges may have different sources and effects, so understanding the concentration and composition of each size range is very useful for assessing environmental quality and analyzing pollution sources.

[0118] Particle size analysis capability: Multichannel particulate matter analyzers offer more detailed particle size analysis capabilities. By measuring particles within different size ranges, the distribution of particles of varying sizes can be understood, leading to a better understanding of their impact on health and the environment.

[0119] Low overall cost: It uses one detection device with two enrichment systems; compared with two independent particle analyzers of different particle sizes, the cost can be reduced by 30%.

[0120] High data validity: Through reasonable design, the two sets of particle size measurements do not interfere with each other, which can increase the measurement enrichment time by 11% for independent particle size analyzers and improve data validity.

[0121] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0122] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0123] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0124] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0125] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0126] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A gas measuring component for measuring the concentration of particulate matter in a gas, characterized in that, include: The first sampling device (10) includes a first enrichment cavity (101) through which the paper tape (200) passes and a first gas channel (102) through which the airflow passes in a direction perpendicular to the paper tape (200) through the first enrichment cavity (101); The second sampling device (20) includes a second enrichment cavity (201) through which the paper tape (200) passes and a second gas channel (202) through which airflow passes in a direction perpendicular to the paper tape (200) through the second enrichment cavity (201). The first enrichment cavity (101) and the second enrichment cavity (201) are distributed along the travel trajectory and are adapted to allow the continuously extending paper tape (200) to pass through along the travel trajectory. A driving device configured to drive the paper tape (200) to move along the travel trajectory, and to drive the paper tape (200) located in the first sampling device (10) and the paper tape (200) located in the second sampling device (20) to move independently of each other; The detection device is movable between a first position and a second position. In the first position, the detection device is opposite to the first sampling device (10), and in the second position, the detection device is opposite to the second sampling device (20).

2. The gas measuring assembly according to claim 1, characterized in that, The driving device includes: The first movable wheel (31) is used to place the wound paper tape (200); The second moving wheel (32) and the first moving wheel (31) are arranged along the travel trajectory outside the first sampling device (10) and the second sampling device (20). The second moving wheel (32) is used to connect the paper tape (200) and drive the paper tape (200) to move along the travel trajectory. The third moving wheel (33) is arranged between the first moving wheel (31) and the second moving wheel (32) along the travel trajectory, and is used to drive the paper tape (200) located between the first sampling device (10) and the second sampling device (20) to move in a direction perpendicular to the paper tape (200).

3. The gas measuring component according to claim 2, characterized in that, The driving device further includes a first tensioning wheel (34) and a second tensioning wheel (35), the first tensioning wheel (34) and the second tensioning wheel (35) being distributed on both sides of the first sampling device (10) along the travel trajectory, and the working surfaces of the first tensioning wheel (34) and the second tensioning wheel (35) being flush with the first enrichment cavity (101), for making the paper tape (200) located between the first tensioning wheel (34) and the second tensioning wheel (35) pass through the first enrichment cavity (101) in a direction parallel to the first enrichment cavity (101); And / or, the driving device further includes a third tensioning roller (36) and a fourth tensioning roller (37), the third tensioning roller (36) and the fourth tensioning roller (37) being distributed on both sides of the second sampling device (20) along the travel trajectory, and the working surfaces of the third tensioning roller (36) and the fourth tensioning roller (37) being flush with the second enrichment cavity (201), for causing the paper tape (200) located between the third tensioning roller (36) and the fourth tensioning roller (37) to pass through the second enrichment cavity (201) in a direction parallel to the second enrichment cavity (201).

4. The gas measuring assembly according to any one of claims 1-3, characterized in that, The travel trajectory is set to a straight line; And / or, the first enrichment cavity (101) and the second enrichment cavity (201) are arranged opposite each other in the left-right direction, and the driving device is distributed in the left-right direction with the first sampling device (10) and the second sampling device (20).

5. The gas measuring assembly according to any one of claims 1-3, characterized in that, The first enrichment cavity (101) has a first sampling point, and the second enrichment cavity (201) has a second sampling point. The first sampling point and the second sampling point are staggered to form sampling spots on the paper tape (200) that are staggered along the width direction of the paper tape (200).

6. The gas measuring assembly according to any one of claims 1-3, characterized in that, The detection device includes: The detection body includes a radiation source (411) and a detector (412). At the first position, the radiation source (411) and the detector (412) are distributed on opposite sides of the first sampling device (10). At the second position, the radiation source (411) and the detector (412) are distributed on opposite sides of the second sampling device (20). A first driving unit is connected to the detection body; The detection device further includes a first track (421) and a second track (422) extending along the travel trajectory, with the radiation source (411) located on the first track (421) and the detector (412) located on the second track (422).

7. The gas measuring assembly according to any one of claims 1-3, characterized in that, The first sampling device (10) and the second sampling device (20) include: Bottom cover (11, 21); The upper cover (12, 22) is distributed opposite to the lower cover (11, 21) and can form a cavity for the paper tape (200) to pass through. A cover drive unit (13, 23) is connected to the upper cover (12, 22) and is used to drive the upper cover (12, 22) to move in directions toward and away from the lower cover (11, 21) to clamp and release the paper tape (200).

8. The gas measuring assembly according to claim 7, characterized in that, The cover driving unit (13, 23) includes a main driving rod (131, 231) and a driving wheel (132, 232). The main driving rod (131, 231) is rotatably connected to the upper cover (12, 22). The first end of the main driving rod (131, 231) is opposite to the driving wheel (132, 232), and the second end of the main driving rod (131, 231) is opposite to the lower cover (11, 21). The hinge point between the main driving rod (131, 231) and the upper cover (12, 22) is located between the first end and the second end. The driving wheel (132, 232) can drive the first end of the main driving rod (131, 231) to move, so that the second end of the main driving rod (131, 231) presses against the lower cover (11, 21) and drives the upper cover (12, 22) away from the lower cover (11, 21).

9. The gas measuring assembly according to claim 8, characterized in that, The cover driving part further includes a reset member, which is connected to the upper cover (12, 22) and has an elastic force that drives the upper cover (12, 22) closer to the lower cover (11, 21); And / or, the cover driving unit (13, 23) further includes a secondary driving rod (133, 233) and a transmission shaft (134, 234), the transmission shaft (134, 234) being rotatably connected to the upper cover (12, 22), the transmission shaft (134, 234) being connected to the main driving rod (131, 231), the first end of the secondary driving rod (133, 233) being connected to the transmission shaft (134, 234), and the second end of the secondary driving rod (133, 233) being connected to the transmission shaft (134, 234). With its two ends opposite to the lower cover (11, 21), the secondary drive rod (133, 233) and the main drive rod (131, 231) are distributed on opposite sides of the upper cover (12, 22). The main drive rod (131, 231) can drive the secondary drive rod (133, 233) so that the second end of the secondary drive rod (133, 233) presses against the lower cover (11, 21) and drives the upper cover (12, 22) away from the lower cover (11, 21).

10. A gas measurement method, applicable to the gas measurement assembly according to any one of claims 1-9, characterized in that, The gas measurement method includes: Step 1: Control the detection device to measure the first background signal of the paper tape at the first sampling device; Step 2: After the first background signal measurement is completed, control the first sampling device to sample; control the detection device to measure the second background signal of the paper tape at the second sampling device; Step 3: After the second background signal measurement is completed, control the first sampling device and the second sampling device to sample. Step 4: After the first sampling device has completed sampling, control the detection device to measure the first particulate matter information at the first sampling device. Step 5: After the first particulate matter information measurement is completed, control the driving device to drive the paper tape to move to update the paper tape at the first sampling device, and control the detection device to measure the first background signal of the paper tape at the first sampling device. Step 6: After the first background signal measurement is completed, control the first sampling device to sample; control the detection device to measure the second particulate matter information at the second sampling device; Step 7: After confirming that the second particulate matter information measurement is completed, control the driving device to drive the paper tape to move to update the paper tape at the second sampling device, control the detection device to measure the second background signal of the paper tape at the second sampling device, and repeat step 3.

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