Radioactive substance monitoring module and monitoring method

Abstract

The invention discloses a radioactive substance monitoring module and a monitoring method, and belongs to the technical field of radiation monitoring, the monitoring module comprises a sampling cover and a casing, and a sampling assembly, a charged particle detector and a signal processor which are arranged in the casing, the sampling assembly is used for collecting radioactive particles; the charged particle detector is used for sensing charged particles emitted by the radioactive particles, and the signal processing assembly is electrically connected with the charged particle detector and used for receiving signals output by the charged particle detector. The monitoring method comprises the steps of starting the transmission mechanism; the air suction fan is started, so that air enters the shell through the sampling cover and is captured by the filter material; and acquiring radioactive energy spectrum analysis data output by the signal processing assembly. The vertical stacking design of the signal processing assembly, the charged particle detector and the suction fan is innovatively adopted, the axial size of the product is greatly reduced, internal gas circuit connection is omitted, the design requirements for light weight and miniaturization are met, and the device is suitable for being carried by a small unmanned aerial vehicle for radioactive substance monitoring.

Description

Technical Field

[0001] This application belongs to the field of radiation monitoring technology, and in particular relates to a radioactive material monitoring module and monitoring method. Background Technology

[0002] Following a nuclear accident, a large amount of radioactive material may be released into the environment. Monitoring the concentration of radioactive aerosols at the accident site is crucial for assessing the accident's development trend, evaluating radiation consequences, and determining the extent of the affected area. However, due to the unpredictable nature of the accident site environment, traditional products are bulky and heavy, making mobile deployment inconvenient, and in some scenarios, they may even be unusable.

[0003] With the widespread application of drones in accident investigation, there is an urgent need for a lightweight monitoring device and method that can be deployed on small drones to conduct timely investigations at accident sites and obtain information on radioactive aerosol contamination. Summary of the Invention

[0004] This application aims to solve the technical problem of the current lack of lightweight radioactive monitoring equipment. To this end, this application provides a radioactive material monitoring module and monitoring method. The invention innovatively adopts a vertical stacking design of signal processing components, charged particle detectors, and air intake fans, which greatly reduces the axial dimension of the product and eliminates the internal air path connection, thus achieving the requirements of lightweight and miniaturized design. It is suitable for radioactive material monitoring carried by small UAVs.

[0005] In a first aspect, embodiments of this application provide a radioactive material monitoring module, which includes a sampling hood and a housing, the sampling hood being used to guide air into the housing; and also includes a component disposed within the housing:

[0006] Sampling unit for collecting radioactive particles in airborne aerosols;

[0007] Charged particle detectors are used to sense charged particles emitted by radioactive particles collected on the sampling assembly.

[0008] The signal processing component, electrically connected to the charged particle detector, is used to receive the signal output by the charged particle detector.

[0009] In some implementations, the sampling component includes:

[0010] A suction fan is used to extract and collect aerosols.

[0011] A perforated plate is placed at the gas inlet of the suction fan;

[0012] The filter media is used to filter radioactive particles in the air. The filter media is laid flat on the porous plate with the front facing the surface of the charged particle detector.

[0013] The transmission mechanism, equipped with filter media, is used to convey the filter media.

[0014] In some implementations, the sampling assembly also includes a differential pressure sensor installed next to the filter media. The differential pressure sensor is used to detect the air pressure difference between the two surfaces of the filter media and feeds back the signal to the control system of the intake fan to adjust the calculated sampling flow rate.

[0015] In some embodiments, an angle constraint baffle is also included, disposed between the charged particle detector and the sampling assembly. The angle constraint baffle has multiple baffles to block charged particles emitted at specific angles from radioactive particles on the sampling assembly.

[0016] In some implementations, multiple baffles are connected in a cross shape, and the connection points correspond to the perforated plate, with an included angle between adjacent baffles.

[0017] In some implementations, the distance between the surface of the charged particle detector and the surface of the filter material is greater than or equal to 4 mm.

[0018] In some implementations, the signal processing component includes an electrically connected amplifier and a multichannel pulse amplitude analyzer, which is used to output radiometric energy spectrum analysis data to reduce the interference of radon progeny based on the energy spectrum analysis data.

[0019] In some implementations, a display control component is also included, mounted in the housing and electrically connected to the multichannel pulse amplitude analyzer, for display and control.

[0020] In some implementations, the sampling hood has multiple airflow ports on its side, arranged around the sampling hood.

[0021] In some implementations, the sampling hood, signal processing components, charged particle detector, and sampling components are rigidly connected.

[0022] Secondly, embodiments of this application provide a monitoring method for a radioactive material monitoring module, which employs the aforementioned radioactive material monitoring module and includes:

[0023] Start the transmission mechanism to convey the filter media to the perforated plate;

[0024] Start the suction fan to allow air to enter the housing through the sampling hood and pass through the filter material at a certain flow rate. The aerosol particles carried in the gas are effectively captured by the filter material and fixed in the fiber structure of the filter material.

[0025] After sampling and measurement for a period of time, the signal processing component outputs radiometric energy spectrum analysis data to calculate the concentration of the target nuclide aerosol in the air.

[0026] As can be seen from the above technical solution, the beneficial effects of this application are as follows:

[0027] 1. The monitoring module of this application consists of a sampling hood and a housing, both of which are shell structures that allow aerosols to flow inside, resulting in a lightweight structure. Inside the housing, a charged particle detector, a signal processing component, and a sampling component are installed. The sampling component can collect radioactive particles in the aerosol, the charged particle detector senses the charged particles emitted by the radioactive particles, and the signal processing component receives the signal from the charged particle detector. These three components constitute the overall structure for monitoring radioactivity. The vertical stacking design of the signal processing component, charged particle detector, and sampling component significantly reduces the axial dimension of the product, eliminates the need for internal gas path connections, and achieves a lightweight design, making it suitable for use by small UAVs for monitoring radioactive materials.

[0028] 2. The monitoring method of this application enables the collection of radioactive particles in aerosols by the filter material through an electrically controlled transmission mechanism and an air intake fan. The radioactive particles are then detected by a charged particle detector and analyzed by a signal processing component, enabling continuous monitoring of radioactive substances in aerosols. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced one by one below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other embodiments and drawings can be obtained based on these drawings without creative effort. Various schematic diagrams according to the embodiments of this application are shown in the accompanying drawings. These drawings are not necessarily drawn to scale. For the purpose of clarity, some details have been enlarged and some details may have been omitted.

[0030] Figure 1 A disassembly diagram of an embodiment of the radioactive material monitoring module of the present invention is shown;

[0031] Figure 2 A partial cross-sectional view of an embodiment of the interior of the housing of the present invention is shown;

[0032] Figure 3 A schematic diagram of an embodiment of the angle constraint baffle of the present invention is shown;

[0033] Figure 4 A schematic diagram of an embodiment of the radioactive material monitoring module of the present invention is shown.

[0034] Reference numerals: 110, sampling hood; 120, housing; 121, fan frame; 130, sampling assembly; 131, suction fan; 132, perforated plate; 133, filter media; 134, transmission mechanism; 135, differential pressure sensor; 136, angle constraint baffle; 140, charged particle detector; 150, signal processing assembly; 160, display and control assembly. Detailed Implementation

[0035] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application. The described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments in this application, they can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] This application is described below with reference to the accompanying drawings and specific embodiments:

[0037] Please refer to Figure 1 and Figure 2 According to a first aspect of this application, a radioactive material monitoring module is provided, which includes a sampling cover 110 and a housing 120. The sampling cover 110 is used to guide air into the housing 120. The sampling cover 110 is lid-shaped and has holes, slits or openings for airflow. The inside of the sampling cover 110 is connected to the inside of the housing 120. After the airflow enters the sampling cover 110, it can enter the housing 120. The sampling cover 110 is located on the top of the housing 120. In this way, the sampling cover 110 has a covering function and also provides a rainproof effect, protecting the internal components of the housing 120. The monitoring module also includes, within the housing 120, a sampling component 130, a charged particle detector 140, and a signal processing component. The sampling component 130 collects radioactive particles from aerosols carried in the air. The sampling component 130 can be made of fiber mesh, micropores, or absorbent materials that leave radioactive particles behind after the aerosol flows, thus achieving a filtering effect. The charged particle detector 140 senses charged particles emitted by the radioactive particles collected by the sampling component 130 and employs a surface-passivated ion-implanted planar silicon detector. The signal processing component 150, electrically connected to the charged particle detector 140, receives the signal output from the charged particle detector 140. The signal processing component 150 consists of a charge-sensitive amplifier and a miniature multichannel pulse analyzer. This design minimizes the space occupied within the housing 120, meeting the requirements for lightweight construction.

[0038] Existing technologies lack lightweight radioactivity monitoring equipment. This application, however, uses a sampling hood 110 and a housing 120 to form an overall structure. Both the sampling hood 110 and the housing 120 are shell structures that allow aerosol flow, resulting in a lightweight structure. Inside the housing 120, only a charged particle detector 140, a signal processing component 150, and a sampling component 130 are installed. The sampling component 130 collects radioactive particles from the aerosol, the charged particle detector 140 senses charged particles emitted by the radioactive particles, and the signal processing component 150 receives the signal from the charged particle detector 140. These three components constitute the overall structure for monitoring radioactivity. The vertical stacking design of the signal processing component 150, the charged particle detector 140, and the sampling component 130 significantly reduces the axial dimensions of the product and eliminates the need for internal gas path connections. The aerosol enters the housing 120 through the sampling hood 110, while the radioactive particles remain on the sampling component 130. The charged particles emitted by the radioactive particles are directed towards the charged particle detector 140, and the signal processing component 150 receives the data from the charged particles. This application provides a relatively lightweight structural form, which is simpler than traditional products, meets the requirements of lightweight design, and is suitable for use by small drones for monitoring radioactive materials.

[0039] Please refer to Figure 1 In some embodiments, the sampling assembly 130 includes a suction fan 131, a perforated plate 132, a filter material 133, and a transmission mechanism 134. The suction fan 131 is used to draw in and collect aerosols. A small fan is used to generate negative pressure to draw in the aerosol airflow. A high-speed brushless motor can be used to drive the fan blades. The fan is installed inside the housing 120. The gas inlet of the suction fan 131 faces the sampling hood 110, and the gas outlet corresponds to the hole opened on the housing 120. The perforated plate 132 is located at the gas inlet of the suction fan 131. The perforated plate 132 has several small holes, which are opposite to the gas inlet of the suction fan 131. The filter material 133 is made of polytetrafluoroethylene and has a pore size of 3μm. Filter material 133 is used to collect radioactive particles in aerosols. Filter material 133 is laid flat on a porous plate 132, facing the surface of the charged particle detector 140, and tightly attached to the upper surface of the porous plate 132. The aerosol airflow passes through filter material 133, then through the porous plate 132, and finally enters the intake fan 131. A transmission mechanism 134, equipped with filter material 133, is used to transport the filter material 133. The transmission mechanism 134 uses a motor and a driven wheel, located on opposite sides of the top of the intake fan 131. The motor is a geared motor. Both ends of the filter material 133 are connected to the motor and the driven wheel, respectively. The motor operates and winds up the filter material 133. The driven wheel moves with the winding of the filter material 133, maintaining the filter material 133 under tension at all times. After one sampling and measurement cycle is completed, the transmission mechanism 134 performs a winding action on the filter material 133, exposing unused filter material 133 for the next use.

[0040] Since the filter material 133 can collect radioactive particles, and the number of radioactive particles collected is proportional to the number of charged particles sensed by the charged particle detector 140, the concentration of radioactive particles in the air can be calculated by detecting charged particles. Based on this, this application can be used for rapid monitoring of the concentration of radioactive aerosols in complex accident scenarios.

[0041] In some embodiments, the sampling assembly 130 further includes a differential pressure sensor 135, installed next to the filter media 133. The differential pressure sensor 135 detects the pressure difference between the two surfaces of the filter media 133 and feeds back the signal to the control system of the suction fan 131. The control system automatically adjusts the power of the suction fan 131 according to the signal to adjust the calculated sampling flow rate. During the sampling process, a pressure difference is generated between the upper and lower surfaces of the filter media 133. This pressure difference is related to the filter media 133 itself and the sampling flow rate. Once the filter media 133 is determined, a relationship can be established between the pressure difference and the sampling flow rate. Thus, by detecting the pressure difference between the two surfaces of the filter media 133 through the differential pressure sensor 135, it is possible to determine whether the detection requirements are met. If the pressure difference does not meet the requirements, the pressure difference between the two surfaces of the filter media 133 can be adjusted by adjusting the sampling flow rate of the suction fan 131, thereby making the pressure difference meet the detection conditions.

[0042] Specifically, a fan frame 121 is provided inside the housing 120, and an intake fan 131 is installed and fixed inside the fan frame 121. A sampling port is provided at the top of the fan frame 121, and a perforated plate 132 is placed on top of the fan frame 121, with the sampling port corresponding to the perforated position of the perforated plate 132. The perforated plate 132 can be fixed to the fan frame 121 with screws, and there is a gap between the perforated plate 132 and the fan frame 121. Filter media 133 passes through the gap between the perforated plate 132 and the fan frame 121. To increase the structural stability inside the housing 120, a bracket can also be provided as the mounting base for the sampling component 130, signal processing component 150, charged particle detector 140, etc., to support each component.

[0043] Please refer to Figure 3In some embodiments, the sampling assembly 130 further includes an angle constraint baffle 136 disposed between the charged particle detector 140 and the sampling assembly 130. Specifically, the angle constraint baffle 136 is fixed to the top of the aforementioned fan frame 121, located between the perforated plate 132 and the charged particle detector 140. The angle constraint baffle 136 has multiple baffles to block some of the charged particles emitted from the radioactive particles on the sampling assembly 130. In some embodiments, the multiple baffles are connected in a cross shape, and the connection points correspond to the perforated plate 132. Adjacent baffles have an included angle. The baffles are elongated strips, thin metal sheets, 4 mm in height. The multiple baffles cross at the middle position and are connected and fixed. The multiple baffles are vertically arranged, and one of the longer baffles has connecting holes at both ends and is fixed inside the housing 120 or on the outer shell of the signal processing assembly 150 through the connecting holes.

[0044] An angle-constrained baffle 136 is used to block particles that are incident at large angles towards the charged particle detector 140. The radioactive particles on the filter material 133 decay and are then incident on the charged particle detector 140. The angle between their direction and the direction of the charged particle detector 140 surface includes various directions from 0 to 90°. The angle-constrained baffle 136 can block charged particles that are incident at large angles. Charged particles that are incident at large angles have a longer incident path and lose more energy. The angle-constrained baffle 136 can maintain a certain energy resolution of the charged particle detector 140.

[0045] In some embodiments, the sampling hood 110, signal processing component 150, charged particle detector 140, and sampling component 130 are rigidly connected, and can be fixed by screws, adhesives, or other methods. For example, the charged particle detector 140 and the signal processing component 150 are fixed by a threaded connection, and the above-mentioned components have the specific positional relationship described above. The signal processing component 150 and the charged particle detector 140 are located between the sampling hood 110 and the sampling component 130, and the charged particle detector 140 is located between the signal processing component 150 and the sampling component 130. Specifically, as shown in the figure, from top to bottom, the components are sampling hood 110, signal processing component 150, charged particle detector 140, porous plate 132, and filter material 133. The suction fan 131 and the transmission mechanism 134 are located below the filter material 133, and the angle constraint baffle 136 is located between the porous plate 132 and the charged particle detector 140. Aerosols enter the housing 120 through the sampling hood 110 and are collected by the filter material 133. Charged particles emitted by radioactive particles on the filter material 133 can enter the charged particle detector 140.

[0046] In some embodiments, the distance between the surface of the charged particle detector 140 and the surface of the filter material 133 is greater than 4 mm; 4 mm is an optimized value. If the distance between the charged particle detector 140 and the filter material 133 is too close, it will lead to sampling loss of large-diameter radioactive aerosol particles. Maintaining the above distance can ensure effective monitoring of radioactive particles.

[0047] In some embodiments, the signal processing component 150 includes an amplifier and a multichannel pulse amplitude analyzer electrically connected to each other. The multichannel pulse amplitude analyzer is used for charged particle energy analysis, reducing interference from radon progeny, and outputting radiometric spectrum analysis data. The radiometric spectrum analysis data includes energy spectrum and waveform. The signal processing component 150 may be equipped with a remote communication interface to connect to the communication module of a UAV, or may be configured with a separate communication module. The signal processing component 150 has a housing with lugs at its four corners, which secure the signal processing component 150 within the housing 120, specifically mounted on the top of the aforementioned fan frame 121. The amplifier and multichannel pulse amplitude analyzer are embedded or fixed within the housing with screws. The amplifier amplifies the signal received from the charged particle detector 140 before connecting it to the multichannel pulse amplitude analyzer. The signal processing component 150 also includes a detector bias voltage source.

[0048] Please refer to Figure 4 In some embodiments, the monitoring module further includes a display control component 160, mounted on the housing 120. The housing 120 has a mounting port on its surface. The display control component 160 is used for display and control, and is embedded in the mounting port. The display control component 160 is electrically connected to a multichannel pulse amplitude analyzer to display radiometric spectroscopy analysis data. The multichannel pulse amplitude analyzer enables real-time online analysis of aerosol samples. The monitoring module of this application also includes a power supply interface, which is connected to the detector bias voltage source, the motor of the transmission mechanism 134, and the suction fan 131. The power supply interface can be connected to a lithium battery on the terminal; additionally, a battery can be configured inside the housing 120 for independent power supply.

[0049] In some embodiments, the sampling cover 110 has multiple airflow ports on its side, which are arranged around the sampling cover 110. Aerosols can enter the housing 120 through these airflow ports. For example, if the airflow ports are shaped like a shuttle and arranged vertically, with multiple airflow ports circling the sampling cover 110 and spaced at equal intervals, this provides an open sampling structure that makes sampling convenient and efficient.

[0050] A second aspect of this application provides a monitoring method for a radioactive material monitoring module, which employs the aforementioned radioactive material monitoring module and includes:

[0051] S1. Start the transmission mechanism 134 to convey the filter media 133 to the porous plate 132. Send a command to the monitoring module via the remote terminal to set the sampling duration and measurement duration. After receiving the start command, the monitoring module electrically connects the motor of the transmission mechanism 134. The filter media 133 is driven by the output end of the motor, and the unused area of ​​the filter media 133 moves to the porous plate 132, corresponding to the sampling port. The transmission mechanism 134 then stops.

[0052] S2. Start the intake fan 131 to allow aerosols to enter the housing 120 through the sampling hood 110 and pass through the filter material 133 at a certain flow rate. The aerosol particles carried in the air are captured by the filter material 133 and fixed in the fiber structure of the filter material 133. The intake fan 131 draws aerosol airflow from the external environment of the module through the inside of the housing 120 and the sampling hood 110. Radioactive particles enter the housing 120 and are trapped on the surface of the filter material 133 facing the charged particle detector 140. During the sampling process, the differential pressure data of the differential pressure sensor 135 is collected in real time, and the aerosol sampling volume is calculated according to the differential pressure flow rate correction curve.

[0053] S3. Charged particles emitted by radioactive material particles blocked on filter material 133 enter the sensitive volume of charged particle detector 140. After monitoring for a period of time, the sampling time reaches the preset value. Signal processing component 150 collects the signal output by charged particle detector 140 and performs energy spectrum analysis to obtain radioactive energy spectrum analysis data output by signal processing component 150.

[0054] S4. Based on the aerosol sampling volume obtained in step S2 and the radioactive alpha particle energy spectrum obtained in step S3, calculate the activity of the radioactive material, and further calculate the concentration of the analyte aerosol in the air.

[0055] In application, the monitoring module can first be mounted on a drone via S0. The drone is equipped with a basket, frame, or other structure with a storage space, and the monitoring module is placed there. After collecting the results obtained in S3 or S4, the results or other information can be remotely obtained through the communication interface of the signal processing component 150 or the communication module on the drone.

[0056] Regarding the specific implementation methods of this application, it should be noted that:

[0057] In the description of this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," "connected," etc., should be interpreted broadly. For example, "fixed" can refer to a fixed connection, a detachable connection, or an integral molding; "connection" can refer to a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection of two components or the interaction between two components, unless otherwise expressly limited; "connected" can refer to the internal connection of two parts and the connection between two parts, or the spatial connection between them, whereby the two parts are directly or indirectly connected through the part forming the space. The terms "set," "installed," "equipped with," "configured," etc., should also be interpreted broadly. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0058] In the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., 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 application and simplifying the description, and do not indicate or imply that the system or component 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 application. All directional indications are only used to explain the relative positional relationship and movement between components in a specific orientation. If the specific orientation changes, the directional indication will also change accordingly.

[0059] In the description of this application, the use of terms such as "some embodiments," "optional embodiments," "example," "specific example," "optional example," or "optional embodiment," etc., indicates 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 this application, but does not imply that these embodiments illustrate and describe all possible forms of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0060] The present invention has been described in detail above with reference to specific embodiments and exemplary examples. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments; the above description should not be construed as a limitation of the present invention. Technical solutions between various embodiments can be combined with each other, but must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application. Although embodiments of the present application have been shown and described, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application. Those skilled in the art will understand that various other specific changes and combinations of embodiments based on the technical teachings disclosed in this application, without departing from the essence of the present application, are still within the scope of protection defined by the claims of the present invention and their equivalent technical solutions.

Claims

1. A radioactive material monitoring module, characterized in that, Includes a sampling hood (110) and a housing (120), the sampling hood (110) being used to guide air into the housing (120); and also includes, disposed within the housing (120): Sampling component (130) for collecting radioactive particles in airborne aerosols; A charged particle detector (140) is used to sense charged particles emitted by radioactive particles collected on the sampling assembly (130); The signal processing component (150) is electrically connected to the charged particle detector (140) and is used to receive the signal output by the charged particle detector (140).

2. The radioactive material monitoring module according to claim 1, characterized in that, The sampling component (130) includes: A suction fan (131) is used to collect aerosols. A perforated plate (132) is disposed at the gas inlet of the suction fan (131); Filter media (133) for filtering radioactive particles in the air, the filter media (133) is laid flat on the porous plate (132) with its front facing the surface of the charged particle detector (140); The transmission mechanism (134) is equipped with the filter material (133) and is used to convey the filter material (133).

3. The radioactive material monitoring module according to claim 2, characterized in that, The sampling component (130) also includes a differential pressure sensor (135), which is installed next to the filter material (133). The differential pressure sensor (135) is used to detect the air pressure difference between the two surfaces of the filter material (133) and feed back the signal to the control system of the suction fan (131) to adjust the calculated sampling flow rate.

4. The radioactive material monitoring module according to claim 2 or 3, characterized in that, It also includes an angle constraint baffle (136) disposed between the charged particle detector (140) and the sampling assembly (130). The angle constraint baffle (136) is provided with multiple baffles to block some of the charged particles emitted from the radioactive particles on the sampling assembly (130).

5. The radioactive material monitoring module according to claim 4, characterized in that, The multiple baffles are connected in a cross shape, and the position of the connection corresponds to the perforated plate (132), with an included angle between adjacent baffles.

6. The radioactive material monitoring module according to claim 2 or 3, characterized in that, The distance between the surface of the charged particle detector (140) and the surface of the filter material (133) is greater than or equal to 4 mm.

7. The radioactive material monitoring module according to claim 2, characterized in that, The signal processing component (150) includes an amplifier and a multichannel pulse amplitude analyzer that are electrically connected. The multichannel pulse amplitude analyzer is used to output radiometric energy spectrum analysis data and reduce the interference of radon progeny based on the energy spectrum analysis data.

8. The radioactive material monitoring module according to claim 2, characterized in that, The sampling cover (110) has multiple airflow ports on its side, and the multiple airflow ports are arranged around the sampling cover (110).

9. The radioactive material monitoring module according to claim 8, characterized in that, The sampling cover (110), the signal processing component (150), the charged particle detector (140), and the sampling component (130) are rigidly connected.

10. A monitoring method for a radioactive material monitoring module, characterized in that, The radioactive material monitoring module according to any one of claims 2-9 comprises: The transmission mechanism (134) is activated to convey the filter material (133) to the porous plate (132); The suction fan (131) is started, allowing air to enter the housing (120) through the sampling hood (110), and aerosol particles carried in the air are captured in the filter material; After sampling and measurement for a period of time, the signal processing component (150) outputs radiometric energy spectrum analysis data, and calculates the concentration of the target nuclide aerosol in the air.

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