Particulate matter weighing evaluation system

Abstract

The utility model relates to a particulate matter weighing evaluation system, comprising a particulate matter generating device which is configured to at least generate particulate matter fluid with fixed particle size and stable mass concentration; the standard filter membrane assembly is connected with the particulate matter generating device; the standard filter membrane assembly is configured to at least provide a standard filter membrane; the standard filter membrane is configured to at least collect particulate matters in the particulate matter fluid; the sampling assembly is connected with the particulate matter generating device and the standard filter membrane assembly, and the sampling assembly is configured to at least control the flow when the particulate matter fluid reaches the standard filter membrane; wherein the particulate matter weighing evaluation system is configured to be capable of obtaining the theoretical mass of the particulate matter collected on the standard filter membrane, and the measured mass of the particulate matter collected on the standard filter membrane can be obtained through the weighing device to be evaluated, so that the theoretical mass and the measured mass are compared to evaluate the accuracy of the weighing device.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental monitoring, in particular to a particle weighing and evaluation system. Background Art

[0002] PM 2.5 Refers to particles with an aerodynamic equivalent diameter of less than or equal to 2.5μm in ambient air, which have a great impact on human health and atmospheric environmental quality and are the main influencing factor of haze. The "Ambient Air Quality Standard" (GB 3095-2012) issued by my country in 2012 stipulates the fine particulate matter PM 2.5 The annual average is 35 μg / m 3 Manual monitoring of particulate matter is the weight method (or reference method), which is a globally recognized classic method for measuring the mass concentration of atmospheric particulate matter. It uses a manual particulate sampler to collect samples and then uses a particulate weighing system to weigh and determine the mass concentration of ambient air particulate matter PM2.5. This method is also PM 2.5 An important method for installation and acceptance of continuous automatic mass concentration monitoring system.

[0003] There are many factors that affect the accuracy of the particle weighing system, such as the precision of the weighing balance, the temperature and humidity of the constant temperature and humidity chamber, the filter membrane equilibration time, the filter membrane static electricity, the filter membrane buoyancy, etc. The accuracy of the weighing balance can be calibrated by weights, but with the improvement of ambient air quality, the mass of particulate matter weighing is getting smaller and smaller, and factors such as filter membrane static electricity have become the primary factor affecting the weighing accuracy. 10 and PM 2.5 Determination of Gravimetric Method of Particulate Matter in Ambient Air (PM 2.5 ) Manual Monitoring Method (Gravimetric Method) Technical Specifications "Two standards are used to judge the weighing accuracy of the sampling filter membrane and the stability of the weighing system. The standard clearly stipulates that after sampling, an analytical balance with a calibration graduation value of 0.1mg or 0.01mg is used for weighing. If the difference between the two weighings is less than 0.4mg or 0.04mg, the filter membrane is considered to be accurately weighed; a blank filter membrane that has been repeatedly weighed is used as a "standard filter membrane". The "standard filter membrane" is weighed during each weighing of the sampling filter membrane. If the difference between the two weighings is less than ±5mg (large flow) or ±0.5mg (medium flow and small flow), the weighing system is considered stable and the filter membrane weighing is qualified. This method can only evaluate the weighing stability of the particulate matter weighing system, and cannot evaluate the accuracy of the weighing system. Utility Model Content

[0004] In view of the above analysis, the present invention aims to provide a particle weighing and evaluation system to solve the above problems.

[0005] The purpose of this utility model is mainly achieved through the following technical solutions:

[0006] The utility model provides a particle weighing and evaluation system, comprising:

[0007] a particle generating device configured to generate at least a particle flow having a fixed particle size and a stable mass concentration;

[0008] A standard filter membrane assembly is connected to the particle generating device; the standard filter membrane assembly is configured to at least provide a standard filter membrane; the standard filter membrane is configured to at least collect particulate matter in the particulate fluid;

[0009] a sampling assembly connected to the particle generating device and the standard filter membrane assembly, wherein the sampling assembly is configured to at least control the flow rate of the particulate fluid when it reaches the standard filter membrane;

[0010] In which, the particulate matter weighing evaluation system is configured to obtain the theoretical mass of the particulate matter collected on the standard filter membrane, and the measured mass of the particulate matter collected on the standard filter membrane can be obtained through the weighing device to be evaluated, so as to compare the accuracy of the theoretical mass with the measured mass evaluation weighing device.

[0011] Furthermore, the particle generating device includes a gas supply component, a liquid supply component and an atomizing component, and the atomizing component is communicated with the gas supply component and the liquid supply component respectively;

[0012] The gas supply component is configured to provide a quantitative amount of clean gas to the atomization component;

[0013] The liquid supply component is configured to provide a quantitative amount of liquid to the atomization component;

[0014] The atomizing assembly is configured to mix and disperse the gas provided by the gas providing assembly and the liquid provided by the liquid providing assembly into a particulate fluid.

[0015] Further, the gas supply assembly includes a connected air compressor and filter element;

[0016] The air compressor is configured to convert external air into compressed air and to measure the flow rate of the compressed air;

[0017] The filter element is configured to remove impurities from the compressed air;

[0018] The inlet of the filter element is connected to the air compressor, and the outlet of the filter element is communicated with the air inlet of the atomizing assembly so as to provide the filtered compressed air to the atomizing assembly.

[0019] Further, the liquid providing assembly includes a connected liquid reservoir and a syringe pump;

[0020] The liquid reservoir is configured to store liquid provided to the atomizing assembly;

[0021] The syringe pump is configured to provide the liquid to the atomizing assembly in a quantitative manner;

[0022] Preferably, the liquid supply assembly includes a plurality of syringe pumps, and the plurality of syringe pumps are connected to the liquid reservoir in parallel.

[0023] Furthermore, the atomization assembly includes an atomizer and a mixing chamber;

[0024] The atomizer is provided with a liquid inlet in communication with the liquid supply assembly, and the atomizer is configured to break up the liquid into droplets and introduce the droplets into the mixing chamber;

[0025] The mixing chamber is provided with an outlet and an air inlet connected to the gas supply assembly. After the liquid droplets and the gas are evenly mixed in the mixing chamber, they are guided out of the atomization assembly through the air outlet.

[0026] Furthermore, the particle generating device further comprises a particle cutter, which is in communication with the outlet of the atomizing assembly so as to cut the particles discharged from the atomizing assembly into particles of a fixed size.

[0027] Furthermore, the standard filter membrane assembly includes a standard filter membrane and a membrane support, and the standard filter membrane is mounted on the membrane support.

[0028] Further, the sampling assembly includes a flow controller and a sampling pump connected;

[0029] The flow controller and the sampling pump are configured to jointly control the flow of the particulate fluid reaching the standard filter membrane and simultaneously control the sampling time.

[0030] Furthermore, the particulate matter weighing and evaluation system further includes an electrostatic removal device;

[0031] The static electricity removal device is configured to at least remove static electricity from a standard filter membrane;

[0032] When the measurement error of the weighing device exceeds ±5%, place the marked filter membrane with collected particles in the static removal device to remove static electricity, and then re-evaluate the accuracy of the weighing device;

[0033] Alternatively, the labeled filter membrane that has collected the particulate matter may be passed through a static removal device to remove static electricity before being weighed by a weighing device.

[0034] Furthermore, the static removal device includes a high voltage power supply and a C-type remover;

[0035] The C-type remover includes a C-type removal area and multiple pairs of needle-type electrodes arranged in the C-type removal area, each pair of needle-type electrodes includes a needle-type positive electrode and a needle-type negative electrode, the needle-type positive electrode is electrically connected to the positive pole of the high-voltage power supply, and the needle-type negative electrode is electrically connected to the negative pole of the high-voltage voltage.

[0036] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: providing an evaluation system capable of evaluating the measurement accuracy of a particle weighing device. Specifically, the system generates a particle flow having a fixed particle size and a stable mass concentration through a particle generating device, and controls the flow rate of the particle flow by using a component, thereby being able to obtain the theoretical mass c of the particles collected on a standard filter membrane. s The measured mass c of the particles collected on the standard filter membrane can be obtained by weighing the device, and the theoretical mass c of the particles collected on the standard filter membrane can be compared with the theoretical mass c of the particles collected on the standard filter membrane. s Evaluate the weighing accuracy of the weighing device with the measured mass c.

[0037] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of the present invention will be described in the following content, and some advantages will become apparent from the description or be understood through practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the text and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference symbols denote the same components.

[0039] Figure 1 It is a structural block diagram of the evaluation weighing device of the evaluation system in a specific embodiment;

[0040] Figure 2 It is a structural diagram of the evaluation system in a specific implementation manner;

[0041] Figure 3 Schematic diagram of the structure of the static removal device in a specific embodiment.

[0042] Reference numerals:

[0043] 1-particle generating device; 11-gas supply assembly; 111-air compressor; 112-filter element; 12-liquid supply assembly; 121-liquid reservoir; 122-syringe pump; 13-atomization assembly; 13a-air inlet; 13b-liquid inlet; 13c-liquid outlet; 131-atomizer; 132-mixing chamber; 14-particle cutter; 2-standard filter membrane assembly; 21-membrane holder; 3-sampling assembly; 31-flow controller; 32-sampling pump; 4-weighing device; 5-static removal device; 51-high voltage power supply; 52-C-type remover; 521-needle electrode. DETAILED DESCRIPTION

[0044] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0045] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the term "connected" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances.

[0046] The terms "top," "bottom," "above," "below," and "on" used throughout the description refer to relative positions of components of a device, such as the relative positions of top and bottom substrates within a device. It will be understood that devices are multifunctional regardless of their orientation in space.

[0047] The working surface of the present invention can be a plane or a curved surface, can be inclined, or can be horizontal. For the convenience of description, the present invention is placed on a horizontal surface and used on a horizontal surface, and "high and low" and "up and down" are defined in this way.

[0048] A specific embodiment of the present invention discloses a particle weighing evaluation system that can be used to evaluate the measurement accuracy of a particle weighing device, especially to evaluate PM 2.5 The measurement accuracy of the weighing device, that is, the utility model at least provides a PM 2.5 Weighing evaluation system.

[0049] like Figures 1 to 3 As shown, the particulate matter weighing and evaluation system includes:

[0050] The particle generating device 1 is configured to generate at least a particle flow having a fixed particle size and a stable mass concentration;

[0051] A standard filter membrane assembly 2 is connected to the particle generating device 1, and the standard filter membrane assembly 2 is configured to at least provide a standard filter membrane; the standard filter membrane is configured to at least collect particulate matter in the particulate fluid;

[0052] A sampling assembly 3, connected to the particle generating device 1 and the standard filter membrane assembly 2, wherein the sampling assembly 3 is configured to at least control the flow rate of the particulate fluid when it reaches the standard filter membrane;

[0053] Among them, the particulate matter weighing evaluation system is configured to obtain the theoretical mass of the particulate matter collected on the standard filter membrane, and the measured mass of the particulate matter collected on the standard filter membrane can be obtained through the weighing device 4 to be evaluated, so as to compare the accuracy of the theoretical mass and the measured mass evaluation weighing device.

[0054] The particle weighing evaluation system of the utility model (hereinafter referred to as the evaluation system) generates a particle flow with a fixed particle size and stable mass concentration through a particle generating device, and controls the flow rate of the particle flow by using components, thereby being able to obtain the theoretical mass m of the particles collected on the standard filter membrane. s The measured mass m of the particles collected on the standard filter membrane can be obtained by weighing the device, and the theoretical mass m of the particles collected on the standard filter membrane can be compared. s The weighing accuracy of the weighing device is evaluated with the measured mass m. Specifically, the weighing error of the weighing device is △m=100%*(mm s ) / m s , when △m is within the range of ±5%, that is, △m∈[-5%, 5%], the measurement result of the weighing device is considered accurate, otherwise the measurement result of the weighing device is considered inaccurate.

[0055] The utility model provides an evaluation system capable of evaluating the measurement accuracy of a particle weighing device, which has a simple structure and is easy to operate.

[0056] It should be noted that the particulate fluid refers to a gas fluid containing particulate matter, and preferably, the gas is air.

[0057] The material of the standard filter membrane is one of polytetrafluoroethylene filter membrane, quartz filter membrane, glass fiber filter membrane and the like.

[0058] According to one embodiment of the present invention, the particle generating device 1 includes a gas supply component 11, a liquid supply component 12, and an atomizing component 13, wherein the atomizing component 13 is connected to the gas supply component 11 and the liquid supply component 12, respectively. The gas supply component 11 is configured to provide a quantitative amount of clean gas to the atomizing component 13. The liquid supply component 12 is configured to provide a quantitative amount of liquid to the atomizing component 13. The atomizing component 13 is configured to mix the gas provided by the gas supply component 11 with the liquid provided by the liquid supply component 12 and disperse them into a particulate fluid.

[0059] Specifically, the gas supply component 11 includes a connected air compressor 111 and a filter 112. The air compressor 111 is configured to convert external air into compressed air and to measure the flow rate of the compressed air. The filter 112 is configured to remove impurities in the compressed air. The impurities refer to substances with a certain particle size, such as moisture, sulfur dioxide, etc., that is, the particulate matter originally present in the air and not generated by the particle generating device are all impurities. The inlet of the filter 112 is connected to the air compressor 111, and the outlet of the filter 111 is connected to the air inlet 13a of the atomizing component 13, so as to provide the filtered compressed air to the atomizing component 13.

[0060] The flow rate of air entering the atomizing assembly 13 after being filtered by the filter element 112 is V, which is measured by the air compressor 111.

[0061] The liquid providing component 12 includes a connected liquid reservoir 121 and a syringe pump 122, and the liquid reservoir 121 is configured to store the liquid provided to the atomizing component 13. The liquid is a salt solution, and the salt solution has the advantages of stable properties and uniform concentration, can stably produce particulate matter gas, and has good repeatability. Preferably, the liquid is a sodium chloride solution, a potassium chloride solution or other inorganic salt solution, and the concentration c of the salt solution is known. The syringe pump 122 is configured to provide the liquid to the atomizing component 13 in a quantitative manner. Preferably, the liquid providing component 12 includes a plurality of syringe pumps 122, and the plurality of syringe pumps 122 are connected to the liquid reservoir in parallel. When the number of syringe pumps is multiple, the liquid extracted by the multiple syringe pumps is collected at the same place and then introduced into the atomizing component 13 together. The liquid flow rate introduced into the atomizing component 13 by the syringe pump is Q, which is measured by the syringe pump.

[0062] The atomizing assembly 13 includes an atomizer 131 and a mixing chamber 132. The atomizer 131 is provided with a liquid inlet 13b connected to the liquid supply assembly 12. That is, the liquid inlet 13b is connected to the syringe pump 122, so that the syringe pump 122 can introduce the liquid extracted from the liquid outlet 121 into the atomizer. The atomizer 131 is configured to break up the liquid into droplets and introduce the droplets into the mixing chamber 132. The mixing chamber 132 is provided with an outlet 13c and an air inlet 13a connected to the gas supply assembly 11. After the droplets and the clean air are evenly mixed in the mixing chamber 132, they are guided out of the atomizing assembly 13 through the liquid outlet 13c.

[0063] The mass concentration δ (in μg / m 3 ) is calculated as follows:

[0064]

[0065] Wherein, V is the flow rate of clean air entering the atomizing assembly 13, in L / min; c is the concentration of the liquid entering the atomizing assembly 13, in g / L; Q is the flow rate of the liquid entering the atomizing assembly 13, in mL / h.

[0066] The particle generating device further includes a particle cutter 14, which is in communication with the outlet 13c of the atomizing assembly to cut the particles discharged from the atomizing assembly 13 into particles within a fixed size range. 2.5 The cutter is used to cut the particle size in the particle flow into particles with an equivalent diameter of less than or equal to 2.5 μm. The particle cutter is matched with the particle size to be measured by the weighing device to be evaluated. For example, if the particle size to be measured by the weighing device is PM 2.5 , then the particle cutter 14 is PM 2.5 Cutter.

[0067] According to one embodiment of the present invention, the standard filter membrane assembly 2 includes a standard filter membrane and a membrane holder 21 , and the standard filter membrane is configured on the membrane holder 21 .

[0068] The sampling assembly 3 includes a flow controller 31 and a sampling pump 32 connected thereto. The flow controller 31 and the sampling pump 32 are configured to jointly control the flow rate q of the particulate fluid reaching the standard filter membrane and simultaneously control the sampling time t, i.e., the time t for the particulate fluid to flow through the standard filter membrane. In other words, the sampling assembly 4 is able to control the flow rate q and the flow time (i.e., the sampling time t) of the particulate fluid flowing through the standard filter membrane. In this way, the theoretical mass of particulate matter collected by the standard filter membrane can be calculated. s=q*t*δ, where q is in L / min, t is in min, m s The unit of is μg, and the unit of δ is μg / m 3 .

[0069] For example, the sampling pump is started to collect particulate matter under negative pressure, and the flow controller is controlled in real time to ensure that the sampling flow rate is 16.7±2% L / min.

[0070] It should be noted that the structures of the sampling component 3 and the standard filter membrane component 2 themselves are not the innovation of the present invention. Both adopt existing technologies, and the existing technologies can achieve the functions required by both.

[0071] Preferably, the particle load on the filter membrane should be no less than 50 times the calibration graduation value of the weighing device. For example, the mass of the particles collected on the standard filter membrane should be at least 0.5 mg.

[0072] The standard filter membrane is placed in a weighing device for 24 hours of balancing. The balancing conditions are that the temperature is any point between (15 and 30) °C and the humidity is controlled within the range of (45 to 55)% RH. The difference before and after weighing the standard filter membrane is recorded as the measured mass of the particles m, which is then compared with the calculated theoretical mass m. s By comparison, the measurement error △m is obtained. When the measurement error △m is within the range of ±5%, it is considered that the weighing device for the evaluated particulate matter is accurate.

[0073] According to a preferred embodiment of the present invention, the evaluation system further includes a static electricity removal device 5 , and the static electricity removal device 5 is configured to at least remove static electricity on the standard filter membrane.

[0074] The presence of static electricity will affect the measurement quality of standard filter membranes (including standard filter membranes that collect particulate matter). Therefore, when the measurement error of the weighing device exceeds ±5%, the standard filter membrane that collects particulate matter should be placed in an electrostatic removal device to remove static electricity, and then the accuracy of the weighing device should be re-evaluated; alternatively, the standard filter membrane that collects particulate matter should be passed through an electrostatic removal device to remove static electricity before being weighed by the weighing device.

[0075] It should be noted that if static electricity exists on the standard filter membrane, the measurement error will generally exceed ±5%.

[0076] Specifically, the static electricity removal device 5 includes a high-voltage power supply 51 and a C-type remover 52, the C-type remover 52 includes a C-type removal area and multiple pairs of needle-type electrodes 521 arranged in the C-type removal area, each pair of needle-type electrodes 521 includes a needle-type positive electrode and a needle-type negative electrode, the needle-type positive electrode is electrically connected to the positive pole of the high-voltage power supply, and the needle-type negative electrode is electrically connected to the negative pole of the high-voltage voltage.

[0077] Exemplarily, the high voltage power supply adopts 220V power supply and 6000V output.

[0078] The wall surface (including the upper wall, the side wall and the side wall between the upper wall and the lower wall) of the C-shaped remover used to limit the C-shaped removal area is made of metal.

[0079] In this example, the C-type remover 52 includes three pairs of needle-type electrodes 521, which are respectively located on the upper wall, lower wall and side wall of the C-type removal area. Specifically, one end of the needle-type electrode (including a needle-type positive electrode and a needle-type negative electrode) is set on the wall surface of the C-type removal area, and the other end extends vertically toward the center of the C-type removal area, that is, the needle-type positive electrode and the needle-type negative electrode are set in parallel.

[0080] In order to improve the safety of the static removal device, the high voltage power supply and the C-type remover are both grounded, that is, the high voltage power supply and the C-type remover are electrically connected to the ground electrode through the connection terminal.

[0081] A standard filter membrane is placed in the center of the C-shaped removal area 52 for anti-static treatment, and multiple pairs of needle-shaped electrodes 521 are arranged around the outside of the standard filter membrane.

[0082] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A particle weighing and evaluation system, characterized in that: include: a particle generating device configured to generate at least a particle flow having a fixed particle size and a stable mass concentration; A standard filter membrane assembly connected to the particle generating device; The standard filter membrane assembly is configured to at least provide a standard filter membrane; The standard filter membrane is configured to at least be capable of collecting particulate matter in the particulate fluid; a sampling assembly connected to the particle generating device and the standard filter membrane assembly, wherein the sampling assembly is configured to at least control the flow rate of the particulate fluid when it reaches the standard filter membrane; In which, the particulate matter weighing evaluation system is configured to obtain the theoretical mass of the particulate matter collected on the standard filter membrane, and the measured mass of the particulate matter collected on the standard filter membrane can be obtained through the weighing device to be evaluated, so as to compare the accuracy of the theoretical mass with the measured mass evaluation weighing device.

2. The particle weighing and evaluation system according to claim 1, characterized in that: The particle generating device comprises a gas supply component, a liquid supply component and an atomizing component, wherein the atomizing component is communicated with the gas supply component and the liquid supply component respectively; The gas supply component is configured to provide a quantitative amount of clean gas to the atomization component; The liquid supply component is configured to provide a quantitative amount of liquid to the atomization component; The atomizing assembly is configured to mix and disperse the gas provided by the gas providing assembly and the liquid provided by the liquid providing assembly into a particulate fluid.

3. The particulate matter weighing and evaluation system according to claim 2, characterized in that: The gas supply assembly includes a connected air compressor and filter element; The air compressor is configured to convert external air into compressed air and to measure the flow rate of the compressed air; The filter element is configured to remove impurities from the compressed air; The inlet of the filter element is connected to the air compressor, and the outlet of the filter element is communicated with the air inlet of the atomizing assembly so as to provide the filtered compressed air to the atomizing assembly.

4. The particle weighing and evaluation system according to claim 2, characterized in that: The liquid providing assembly includes a connected liquid reservoir and a syringe pump; The liquid reservoir is configured to store liquid provided to the atomizing assembly; The syringe pump is configured to provide the liquid to the nebulizer assembly in a quantitative manner.

5. The particulate matter weighing and evaluation system according to claim 4, characterized in that: The liquid supply assembly includes a plurality of injection pumps, which are connected to the liquid reservoir in parallel.

6. The particle weighing and evaluation system according to claim 2, characterized in that: The atomization assembly includes an atomizer and a mixing chamber; The atomizer is provided with a liquid inlet in communication with the liquid supply assembly, and the atomizer is configured to break up the liquid into droplets and introduce the droplets into the mixing chamber; The mixing chamber is provided with an outlet and an air inlet connected to the gas supply assembly. After the liquid droplets and the gas are evenly mixed in the mixing chamber, they are guided out of the atomization assembly through the outlet.

7. The particulate matter weighing and evaluation system according to claim 6, characterized in that: The particle generating device further comprises a particle cutter, which is communicated with the outlet of the atomizing assembly so as to cut the particles discharged from the atomizing assembly into particles of a fixed size.

8. The particulate matter weighing and evaluation system according to claim 1, characterized in that: The standard filter membrane assembly includes a standard filter membrane and a membrane support, and the standard filter membrane is mounted on the membrane support.

9. The particulate matter weighing and evaluation system according to claim 1, characterized in that: The sampling assembly includes a flow controller and a sampling pump connected; The flow controller and the sampling pump are configured to jointly control the flow of the particulate fluid reaching the standard filter membrane and simultaneously control the sampling time.

10. The particle weighing and evaluation system according to any one of requirements 1 to 9, characterized in that: Also included is a static removal device; The static electricity removal device is configured to at least remove static electricity from a standard filter membrane; When the measurement error of the weighing device exceeds ±5%, place the marked filter membrane with collected particles in the static removal device to remove static electricity, and then re-evaluate the accuracy of the weighing device; Alternatively, the labeled filter membrane that has collected the particulate matter may be passed through a static removal device to remove static electricity before being weighed by a weighing device.

11. The particle weighing and evaluation system according to claim 10, characterized in that: The static removal device includes a high-voltage power supply and a C-type remover; The C-type remover includes a C-type removal area and multiple pairs of needle-type electrodes arranged in the C-type removal area, each pair of needle-type electrodes includes a needle-type positive electrode and a needle-type negative electrode, the needle-type positive electrode is electrically connected to the positive pole of the high-voltage power supply, and the needle-type negative electrode is electrically connected to the negative pole of the high-voltage voltage.

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