A particle weighing and feeding device and method based on light scattering method

Abstract

The application discloses a kind of particle weighing feeding equipment and method based on light scattering method, equipment includes: particle conveying device includes the sample introduction channel that can be supplied with particle sequentially and the air power system of driving particle sequentially through sample introduction channel, detection cavity is equipped on sample introduction channel;Wherein, particle is the particle with determined shape, size, density;Optical detection device includes the light emitting component for providing convergent light beam, and the light receiving component for receiving scattered light;Weighing calculation device is used to process the electrical signal generated after receiving scattered light to obtain electrical pulse signal, the pulse number of electrical pulse signal is counted, and the total mass of feeding sample is calculated according to the counting result and the mass of single particle.The weighing of feeding sample is converted into the weighing mode of particle counting, realizes the combination of sample weighing and sample feeding process, reduces the sample loss of sample feeding process, improves the efficiency and precision of solid sample weighing feeding.

Description

Technical Field

[0001] This invention relates to the field of solid material weighing technology in the chemical and biological fields, specifically to a particulate matter weighing and feeding device and method based on light scattering. Background Technology

[0002] Currently, in the preparation of chemical and pharmaceutical samples, there are two main methods for weighing and feeding solid samples: manual weighing and feeding, and automated weighing and feeding. Manual weighing and feeding primarily involves weighing samples using a balance and manually adding them. Automated weighing and feeding utilizes a high-precision, fully automated solid weighing and feeding station.

[0003] When preparing and testing samples by manual weighing, some sample may spill or stick to the container during sample transfer, resulting in sample waste and errors in the final feeding. When weighing small amounts of sample, the limited accuracy of the balance itself makes accurate weighing difficult, leading to low efficiency and increased sample preparation and screening time.

[0004] Automated weighing and feeding methods rely on fully automated solid weighing and sampling stations. This method depends on sensor accuracy and can lead to significant errors over large measurement ranges. It requires sophisticated automated equipment that is bulky, complex, and costly. Therefore, developing a high-accuracy method for weighing solid particles is a pressing technical problem that needs to be solved. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of low accuracy and low efficiency in the weighing of solid particles in the prior art, thereby providing a particle weighing and feeding device and method based on light scattering method.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0007] A particulate matter weighing and feeding device based on light scattering method, comprising:

[0008] A particle conveying device includes a sample inlet channel through which particles can pass sequentially and an aerodynamic system for driving the particles sequentially through the sample inlet channel; the sample inlet channel is provided with a detection chamber, which is the location where the particles to be tested are irradiated by a light beam; wherein, the particles are particles with a defined shape, size and density;

[0009] An optical detection device includes a light emitting component for providing a focused light beam and a light receiving component for receiving the scattered light from the particulate matter being excited by the light beam.

[0010] The weighing and calculating device includes a signal processing unit electrically connected to the light receiving component and a weighing and calculating unit electrically connected to the signal processing unit. The signal processing unit processes the electrical signal generated by the light receiving component after receiving scattered light to obtain an electrical pulse signal. The weighing and calculating unit counts the number of pulses of the electrical pulse signal generated by the signal processing unit and calculates the total mass of the sample based on the counting result and the mass of a single particle being tested.

[0011] Furthermore, the mass range of a single particle is 1 × 10⁻⁶. －5 mg to 5mg.

[0012] Furthermore, the diameter of the feed channel is R; when the particles pass through the feed channel, the distance between the two points furthest apart in the projection profile of a single particle on the cross-section of the feed channel (21) is L, satisfying 1.2L≤R≤2.8L.

[0013] Furthermore, the light emitting component includes a light generator and a lens assembly. The light generator is used to emit laser light, and the lens assembly is used to collimate, collect, and focus the laser light to form a linear light spot at the detection cavity.

[0014] Furthermore, the optical detection device also includes optical traps for eliminating laser light that has not been emitted.

[0015] Furthermore, the weighing calculation unit is a microcontroller.

[0016] Furthermore, the microcontroller is also electrically connected to a weighing setting unit, which is used to input a preset weighing value; the sample inlet channel is provided with a control valve that controls the opening and closing of the sample inlet channel, and the control valve is electrically connected to the microcontroller; when the total mass of the sample calculated by the microcontroller reaches the preset weighing value, the microcontroller controls the control valve to close to stop the feeding of particulate matter.

[0017] A method for weighing and feeding particulate matter based on light scattering, comprising:

[0018] The particulate matter is transported to the inlet of the sample inlet channel, and the particulate matter passes through the detection chamber of the sample inlet channel in sequence under the action of aerodynamics or its own gravity; wherein, the particulate matter is particulate matter with a certain shape, size and density;

[0019] The detection cavity is illuminated by focused light, and the light is received and scattered on the particle being tested by the detection cavity.

[0020] The received scattered light signal is processed to obtain an electrical pulse signal. The number of pulses of the electrical pulse signal is counted, and the total mass of the sample is calculated based on the counting result and the mass of a single particle being tested.

[0021] Furthermore, the procedure includes, prior to the step of conveying particulate matter to the inlet of the injection channel:

[0022] Several particulate matter sample groups are randomly selected from the batch of particulate matter for weighing. Each particulate matter sample group includes multiple particulate matter. The quality of the batch of particulate matter is determined based on the weighing results of the particulate matter sample groups, the weight of a single particulate matter, and the number of particulate matter in the particulate matter sample groups.

[0023] If the result is yes, proceed to the next step; if the result is no, select another batch of particulate matter.

[0024] Furthermore, after calculating the total mass of the sample based on the counting results and the mass of a single tested particle, the process also includes:

[0025] Determine whether the total mass of the sample feed reaches the preset weighing value;

[0026] If the judgment result is negative, continue feeding the particulate matter; if the judgment result is positive, stop feeding the particulate matter.

[0027] The technical solution of this invention has the following advantages:

[0028] 1. The particle weighing and feeding device based on light scattering method provided by this invention allows particles with a defined shape, size, and density to be sequentially passed through the detection cavity of the sample feeding channel. The focused light beam provided by the light emitting component is reflected by the particles in the detection cavity and received by the light receiving component. The signal processing unit processes the electrical signal generated by the light receiving component after receiving the scattered light to obtain an electrical pulse signal. The weighing calculation unit counts the number of pulses of the electrical pulse signal and calculates the total mass of the sample based on the pulse count result and the mass of a single particle. Compared with existing sample weighing methods, this invention transforms the weighing of the sample into a particle counting weighing method, combining the sample weighing and sample feeding processes into one, reducing sample loss during the sample feeding process, and improving the efficiency and accuracy of solid sample weighing and feeding. Moreover, the weighing process is not limited by high-precision mass sensors. By using counting weighing, it compensates for the shortcomings of mass sensors with large errors over a wide range of measurement, and does not rely on sophisticated automated equipment. It has a simple structure, small size, and low cost.

[0029] 2. The particle weighing and feeding device based on light scattering method provided by this invention has a single particle mass range of 1×10⁻⁶. －5Between mg and 5 mg, since the mass of a single particle is small, the amount of particle can be adjusted according to the mass of the sample to reduce weighing error over a wide range.

[0030] 3. The particle weighing and feeding device based on light scattering method provided by the present invention has a sample inlet channel diameter R that is 1.2 to 2.8 times the distance between the two farthest points in the projection profile of a single particle on the cross-section of the inlet channel, which can ensure that the particles pass through the inlet channel one by one in sequence.

[0031] 4. The particulate matter weighing and feeding device based on light scattering method provided by the present invention allows for the input of a preset weighing value through a weighing setting unit. When the total mass of the sample calculated by the microcontroller reaches the preset weighing value, the microcontroller controls the control valve to close to stop the feeding of particulate matter. This enables accurate sample feeding and the feeding and weighing process to be automated, thereby improving the sample feeding and weighing efficiency.

[0032] 5. The particulate matter weighing and feeding method based on light scattering provided by this invention transforms the weighing of the sample into a particulate matter counting weighing method, realizing the integration of sample weighing and sample feeding processes into one, reducing sample loss during the sample feeding process, and improving the efficiency and accuracy of solid sample weighing and feeding; moreover, the weighing process is not limited by high-precision mass sensors, and the counting weighing method makes up for the shortcomings of mass sensors with large errors over a wide range, and does not rely on sophisticated automated equipment, with simple structure, small size and low cost.

[0033] 6. The particulate matter weighing and feeding method based on light scattering provided by the present invention performs sampling and weighing detection on a batch of particulate matter before counting, which can determine whether the quality of the batch of particulate matter meets the requirements, reduce particulate matter quality error, and thus improve the accuracy of subsequent feeding and weighing results.

[0034] 7. The particulate matter weighing and feeding method based on light scattering provided by the present invention can stop feeding particulate matter when the total mass of the sample reaches the preset weighing value by setting a preset weighing value, thereby realizing the full automation of the particulate matter feeding and weighing process and improving the sample feeding and weighing efficiency. Attached Figure Description

[0035] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram illustrating the preparation of granules with a defined shape, size, and density using a granulator in an embodiment of the present invention.

[0037] Figure 2 This is a schematic diagram illustrating the structural principle of the particulate matter weighing and feeding device based on the light scattering method in an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the structure of the sample introduction platform for light scattering detection of solid particles through the detection cavity in an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram illustrating the calculation principle of the weighing calculation device for calculating the total mass of the material in an embodiment of the present invention.

[0040] Figure 5 This is a flowchart illustrating the implementation of the particulate matter weighing and feeding method based on light scattering in this embodiment of the invention.

[0041] Explanation of reference numerals in the attached drawings: 11. Granulator; 21. Sample inlet channel; 22. Aerodynamic system; 23. Detection chamber; 311. Light generator; 312. Lens assembly; 32. Light receiver; 33. Light trap; 4. Signal processing circuit; 5. Microcontroller. Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] like Figure 1 Figure 4 shows a particle weighing and feeding device based on light scattering method, which includes a particle conveying device, an optical detection device, and a weighing calculation device.

[0044] In some embodiments, the particle conveying device includes a sample platform, a sample inlet channel 21 disposed on the sample platform, and an aerodynamic system 22. The sample inlet channel 21 has a detection chamber 23, which is specifically the location where the particles being measured are irradiated by a light beam. The inlet of the sample inlet channel 21 is funnel-shaped. The aerodynamic system 22 is located on one side of the inlet of the sample inlet channel 21, the sample platform is located on the other side of the outlet of the sample inlet channel 21, and the detection chamber 23 is located on the sample inlet channel 21 and near the outlet end. The diameter of the sample inlet channel 21 is R. When particles pass through the sample inlet channel 21, the distance between the two furthest points in the projected profile of a single particle on the cross-section of the sample inlet channel 21 is L, satisfying 1.2L≤R≤2.8L. The aerodynamic system 22 drives individual particles sequentially through the sample inlet channel 21. When a particle passes through the detection chamber 23, it is irradiated by light, realizing one particle counting process. The mass range of a single particle is 1×10⁻⁶. －5 For particles weighing between mg and 5 mg, due to their small mass, the appropriate number of particles can be added based on the sample mass, reducing weighing errors over a wide range. In other embodiments, the particle conveying device may not require the aerodynamic system 22; the particles pass sequentially through the detection chamber 23 on the sample inlet channel 21 under their own gravity, achieving particle counting. However, compared to the method where particles rely on their own gravity to pass sequentially through the sample inlet channel 21, the aerodynamic system 22 increases the number of particles passing through the sample inlet channel 21 per unit time, thus achieving high-throughput particle counting and improving the efficiency of subsequent sample feeding and weighing.

[0045] The optical detection device includes a light emitting component and a light receiving component. The light emitting component provides a focused light beam, and the light receiving component receives the scattered light from the particle being measured after it is excited by the light beam. The light emitting component includes a light generator 311 and a lens assembly 312. The light generator 311 emits laser light, and the lens assembly 312 collimates, collects, and focuses the laser light to form a linear spot at the detection cavity 23. In some embodiments, the lens assembly 312 includes a collimating lens, an X-axis cylindrical lens, and a Y-axis cylindrical lens arranged sequentially along the laser optical axis. The light generator 311 can be a laser diode, and the positions of the X-axis and Y-axis cylindrical lenses can be interchanged. After the collimating lens, X-axis cylindrical lens, and Y-axis cylindrical lens collect and focus the laser light, a linear spot is formed at the detection cavity 23. Here, the X-axis direction is the direction of the optical axis, and the Y-axis direction is the direction perpendicular to the optical axis. The X-axis cylindrical lens shapes the light in the X-axis direction, and the Y-axis cylindrical lens shapes the light in the Y-axis direction. The light receiving component is specifically a light receiver 32. The photosensitive area of ​​the light receiver 32 can be set as large as possible. The direction in which the light receiver 32 receives the scattered light is perpendicular to the direction in which the light generator 311 emits the laser.

[0046] The weighing calculation device includes a signal processing unit electrically connected to the light receiver 32, and a weighing calculation unit electrically connected to the signal processing unit. Specifically, the signal processing unit is a signal processing circuit 4 electrically connected to the light receiver 32. The signal processing circuit 4 processes the electrical signal generated by the light receiver 32 after receiving scattered light to obtain an electrical pulse signal. The specific circuit structure of the signal processing circuit 4 is a conventional circuit and will not be described in detail here. The weighing calculation unit is specifically a microcontroller 5 electrically connected to the signal processing circuit 4. The microcontroller 5 counts the number of pulses in the electrical pulse signal generated by the signal processing circuit 4 and calculates the total mass of the sample based on the pulse count result and the mass of a single particle being measured.

[0047] This particulate matter weighing and feeding device based on light scattering uses a granulator 11 to manufacture particles with a defined shape, size, and density, thus obtaining the mass of a single particle. The focused beam provided by the light emitting component is reflected by the particles in the detection cavity 23 and received by the light receiver 32. The signal processing circuit 4 processes the electrical signal generated by the light receiver 32 after receiving the scattered light to obtain an electrical pulse signal. The microcontroller 5 counts the number of pulses of the electrical pulse signal and calculates the total mass of the sample based on the pulse count and the mass of a single particle. Compared with existing sample weighing methods, this device transforms the weighing of the sample into a particle counting weighing method, combining the sample weighing and sample feeding processes into one, reducing sample loss during the sample feeding process, and improving the efficiency and accuracy of solid sample weighing and feeding. Moreover, the weighing process is not limited by high-precision mass sensors. By using counting weighing, it compensates for the shortcomings of mass sensors with large errors over a wide range, and does not rely on sophisticated automated equipment. It has a simple structure, small size, and low cost.

[0048] In some embodiments, the particulate matter weighing and feeding equipment based on the light scattering method also includes a granulation device. Specifically, the granulation device is a granulator 11 used to prepare particles with a defined shape, size, and density. The shape of the particles can be any of spherical, square, or cylindrical, as long as the shape of the particles is regular and it is convenient to calculate the mass of a single particle based on the volume and density of the particles. The granulation technology of the granulator 11 is mature and can produce particles with fixed shape and high dimensional accuracy, which is beneficial to ensuring the mass accuracy of a single particle.

[0049] In some embodiments, the microcontroller 5 is also electrically connected to a weighing setting unit, which is used to input a preset weighing value. A control valve is provided on the sample inlet channel 21 to control its opening and closing. Both the control valve and the pneumatic system 22 are electrically connected to the microcontroller 5. When the total mass of the sample calculated by the microcontroller 5 reaches the preset weighing value, the microcontroller 5 controls the control valve to close and the pneumatic system 22 to stop the feeding of particulate matter. By inputting the preset weighing value through the weighing setting unit, and when the total mass of the sample calculated by the microcontroller reaches the preset weighing value, the microcontroller 5 controls the control valve to close and the pneumatic system 22 to stop the feeding of particulate matter, accurate sample feeding can be achieved, the feeding and weighing process can be automated, and the sample feeding and weighing efficiency can be improved.

[0050] like Figure 5 As shown, this embodiment of the invention also provides a particulate matter weighing and feeding method based on light scattering. Based on the aforementioned particulate matter weighing and feeding equipment based on light scattering, the method includes the following steps:

[0051] Step S10: The particulate matter is transported to the inlet of the sample inlet channel 21. The particulate matter passes through the detection chamber 23 of the sample inlet channel 21 in sequence under the action of aerodynamics or its own gravity. The particulate matter is particulate matter with a certain shape, size and density.

[0052] The mass range of a single particulate matter is 1×10⁻⁶. －5 mg to 5mg; the detection chamber 23 is specifically the location where the particulate matter being measured is irradiated by the light beam. The diameter of the sample inlet channel 21 is R. When a particulate matter passes through the sample inlet channel 21, the distance between the two farthest points in the projection profile of a single particulate matter on the cross-section of the sample inlet channel 21 is L, satisfying 1.2L≤R≤2.8L. The aerodynamic system 22 drives the individual particulate matter to pass through the sample inlet channel 21 sequentially, or the particulate matter passes through the sample inlet channel 21 sequentially under its own gravity. When the particulate matter passes through the detection chamber 23, it is irradiated by the light, realizing one particulate matter counting process.

[0053] Step S20: Illuminate the detection cavity 23 with focused light and receive the light as it passes through the detection cavity 23 and irradiates the particle being tested to generate a scattered light signal.

[0054] In this process, a laser is emitted by a light generator 311. The laser emitted by the light generator 311 is collimated and collected by a lens assembly 312 and then forms a linear light spot at the detection cavity 23. The light receiver 32 receives the light and irradiates the particle being tested through the detection cavity 23 to generate a scattered light signal.

[0055] Step S30: Process the received scattered light signal to obtain an electrical pulse signal, count the number of pulses of the electrical pulse signal, and calculate the total mass of the sample based on the counting result and the mass of a single particle being tested.

[0056] Specifically, signal processing circuit 4 processes the electrical signal generated after the photodetector receives the scattered light to obtain an electrical pulse signal. Microcontroller 5 counts the number of pulses in the electrical pulse signal and calculates the total mass of the sample based on the pulse count and the mass of a single particle being tested.

[0057] This particulate matter weighing and feeding method based on light scattering transforms the weighing of the sample into a particulate matter counting method, integrating the sample weighing and feeding processes into one. This reduces sample loss during the feeding process and improves the efficiency and accuracy of solid sample weighing and feeding. Moreover, the weighing process is not limited by high-precision mass sensors. By using counting weighing, it compensates for the shortcomings of mass sensors in terms of large errors over a wide range. It also does not rely on sophisticated automated equipment, and has a simple structure, small size, and low cost.

[0058] In some embodiments, before the step of conveying the particulate matter to the inlet of the sampling channel 21, the method further includes: randomly selecting several particulate matter sample groups from the batch of particulate matter for weighing, each sample group comprising multiple particulate matter; determining whether the quality of the batch of particulate matter meets the requirements based on the weighing results of the particulate matter sample groups, the weight of a single particulate matter, and the number of particulate matter in the sample group; if the determination result is yes, proceeding to the next step; if the determination result is no, selecting another batch of particulate matter. For example, if the batch of particulate matter contains tens of thousands of particulate matter, each with a theoretical mass of 0.1 mg, 50 particulate matter are selected as a sample group for weighing, and this process is repeated multiple times. If the weighing results are all within 5 ± 0.05 mg, the quality of the batch of particulate matter is considered to meet the requirements. This setup can reduce particulate matter mass error, thereby improving the accuracy of subsequent feeding and weighing results.

[0059] In some implementations, after calculating the total mass of the sample based on the counting results and the mass of a single particle being tested, the method further includes: determining whether the total mass of the sample has reached a preset weighing value; if the determination result is negative, continuing the particle feeding; if the determination result is positive, stopping the particle feeding. By setting a preset weighing value, particle feeding can be stopped when the total mass of the sample reaches the preset weighing value, thereby achieving full automation of the particle feeding and weighing process and improving sample feeding and weighing efficiency.

[0060] In summary, the particulate matter weighing and feeding device and method based on light scattering provided in this embodiment of the invention, compared with existing sample weighing methods, transforms the weighing of the sample into a particulate matter counting weighing method, realizing the integration of sample weighing and sample feeding processes into one, reducing sample loss during the sample feeding process, improving the efficiency and accuracy of solid sample weighing and feeding, and enabling weighing and feeding of samples of any mass; moreover, the weighing process is not limited by high-precision mass sensors, and the counting weighing method compensates for the shortcomings of mass sensors with large errors over a wide range, and does not rely on sophisticated automated equipment, with a simple structure, small size, and low cost.

[0061] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A particulate matter weighing and feeding device based on light scattering method, characterized in that, include: The particle conveying device includes a sample inlet channel (21) through which particles can pass in sequence. The sample inlet channel (21) is provided with a detection chamber (23), which is the place where the particles to be tested are irradiated by a light beam. The particles are particles with a defined shape, size and density. An optical detection device includes a light emitting component for providing a focused light beam and a light receiving component for receiving the scattered light from the particulate matter being excited by the light beam. The weighing and calculating device includes a signal processing unit electrically connected to the light receiving component and a weighing and calculating unit electrically connected to the signal processing unit; the signal processing unit is used to process the electrical signal generated by the light receiving component after receiving scattered light to obtain an electrical pulse signal, and the weighing and calculating unit is used to count the number of pulses of the electrical pulse signal generated by the signal processing unit, and calculate the total mass of the sample based on the counting result and the mass of a single particle being tested; The weighing calculation unit is a microcontroller (5); the microcontroller (5) is also electrically connected to a weighing setting unit, which is used to input a preset weighing value; the sample inlet channel (21) is provided with a control valve that controls the opening and closing of the sample inlet channel (21), and the control valve is electrically connected to the microcontroller (5); when the total mass of the sample calculated by the microcontroller reaches the preset weighing value, the microcontroller controls the control valve to close to stop the feeding of particulate matter.

2. The particulate matter weighing and feeding device based on light scattering method according to claim 1, characterized in that, The mass range of a single particle is 1 × 10⁻⁶. -5 mg~5mg.

3. The particulate matter weighing and feeding device based on light scattering method according to claim 1, characterized in that, The diameter of the injection channel (21) is R; when the particles pass through the injection channel (21), the distance between the two points that are furthest apart in the projection profile of a single particle on the cross-section of the injection channel (21) is L, which satisfies 1.2L≤R≤2.8L.

4. The particulate matter weighing and feeding device based on light scattering method according to claim 1, characterized in that, The light emitting component includes a light generator (311) and a lens assembly (312). The light generator (311) is used to emit laser light, and the lens assembly (312) is used to collimate, collect and focus the laser light to form a linear light spot at the detection cavity (23).

5. The particulate matter weighing and feeding device based on light scattering method according to claim 1, characterized in that, The optical detection device also includes optical traps (33) for eliminating laser light that has not been emitted.

6. A method for weighing and feeding particulate matter based on light scattering, characterized in that, include: The particulate matter is transported to the inlet of the sample inlet channel (21), and the particulate matter passes through the detection chamber (23) of the sample inlet channel (21) in sequence under the action of aerodynamics or its own gravity; wherein, the particulate matter is particulate matter with a certain shape, size and density; The detection cavity (23) is illuminated by focused light, and the light is received and scattered on the particle being tested by the detection cavity (23). The received scattered light signal is processed to obtain an electrical pulse signal. The number of pulses of the electrical pulse signal is counted, and the total mass of the sample is calculated based on the counting result and the mass of a single particle being tested. Determine whether the total mass of the sample feed reaches the preset weighing value; If the judgment result is negative, continue feeding the particulate matter; if the judgment result is positive, stop feeding the particulate matter.

7. The particulate matter weighing and feeding method based on light scattering according to claim 6, characterized in that, The procedure prior to the step of conveying particulate matter to the inlet of the injection channel (21) includes: Several particulate matter sample groups are randomly selected from the batch of particulate matter for weighing, and each particulate matter sample group includes multiple particulate matter. The quality of the batch of particulate matter is determined based on the weighing results of the particulate matter sample group, the weight of a single particulate matter, and the number of particulate matter in the particulate matter sample group. If the result is yes, proceed to the next step; if the result is no, select another batch of particulate matter.

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