A particle concentration rapid measurement method and system based on face scanning extinction method

Abstract

The application discloses a kind of particle concentration fast measurement method and system based on face scanning extinction method, belong to aerosol detection technical field.The method includes two stages of pre-calibration and real-time measurement.In pre-calibration stage, linear laser beam is used to penetrate calibration mixing chamber, and the integral transmission intensity of cross-sectional dimension is measured once, and the standard concentration-absorbance curve of target particulate matter is established.In real-time measurement stage, the same linear beam is used to penetrate the environment to be measured, and the real-time transmission intensity is obtained and the absorbance is calculated, and the real-time concentration of particulate matter is directly obtained by querying the pre-calibration curve.The space different cross-sections can be measured quickly by moving or arranging multiple linear beams, and then the concentration distribution map is drawn.The application solves the problem of low measurement efficiency and insufficient representation of traditional point light source extinction method, and realizes efficient and accurate face scanning measurement of specific particulate matter concentration.

Description

Technical Field

[0001] This application relates to the field of aerosol detection technology, and in particular to a rapid method and system for measuring particulate matter concentration based on surface scanning extinction method. Background Technology

[0002] In the fields of environmental science, industrial production, and health monitoring, the concentration of particulate matter in the air is a key indicator for assessing the degree of pollution, tracing pollution sources, determining equipment wear and tear, or evaluating health risks. Rapidly and accurately measuring and identifying the concentration of specific particulate matter is of great significance for achieving precise monitoring.

[0003] However, traditional methods for measuring particulate matter concentration, such as manual weighing, are accurate but time-consuming and cannot achieve real-time monitoring. While particulate matter measurement based on the principle of light scattering has a fast response, the measurement results are heavily dependent on the complex refractive index of the particulate matter. It is prone to underestimating the size of low refractive index or strongly absorbing particles, and there are large differences in response between different instruments, making on-site calibration difficult. In addition, light scattering instruments such as optical particle counters (OPCs) are mostly point measurement methods with insufficient spatial representativeness, making it difficult to accurately characterize the concentration distribution characteristics of the entire cross section.

[0004] Furthermore, most mainstream extinction measurement devices use point laser light sources, and their detection optical path is only a "line" passing through space. This "line measurement" method has inherent limitations: in order to obtain the overall concentration distribution of a cross section, multiple single-point scans must be performed, resulting in low measurement efficiency and the inability to achieve true real-time surface distribution monitoring; at the same time, the measurement results on the "line" may not accurately represent the average concentration or distribution characteristics of the entire cross section due to local concentration unevenness. Summary of the Invention

[0005] Therefore, it is necessary to provide a rapid measurement method and system for particulate matter concentration based on the surface scanning extinction method to address the above-mentioned technical problems.

[0006] In a first aspect, this application provides a rapid method for measuring particulate matter concentration based on surface scanning extinction, comprising:

[0007] The pre-calibration stage involves constructing a standard concentration-absorbance curve for the target particulate matter; the real-time measurement stage involves obtaining the spatial concentration distribution.

[0008] In the pre-calibration stage and the real-time measurement stage, a linear laser light source is used to broaden the laser beam into a linear spot within the measurement cross section, thereby performing an integral measurement of one dimension of the measurement cross section at once to obtain the overall transmitted light intensity signal of the area illuminated by the linear spot.

[0009] The pre-calibration stage is used to establish a standard concentration-absorbance curve between the concentration of a specific target particulate matter and the absorbance measured by the extinction method under a controlled environment.

[0010] The real-time measurement stage is used to acquire real-time transmitted light intensity signals in the actual test environment using a measurement system with optical parameters consistent with those in the pre-calibration stage, obtain the corresponding absorbance, and directly invert the real-time concentration of the target particles by querying the standard concentration-absorbance curve. Then, the spatial concentration distribution is obtained by continuously moving the linear beam or deploying multiple linear beams.

[0011] In some embodiments, the method further includes:

[0012] The pre-calibration stage includes:

[0013] A certain concentration of target particles is introduced into a sealed mixing chamber and mixed uniformly. At the same time, the concentration of the target particles is measured. A monochromatic laser beam of a preset wavelength is used to horizontally penetrate a fixed measurement section of the mixing chamber. On the emission side of the laser beam, a photodetector is used to receive the transmitted light intensity signal. The concentration of the introduced target particles is changed, and the transmitted light intensity value at different concentrations is recorded to obtain the corresponding absorbance. According to the Lambert-Beer law, a standard correlation curve between the concentration of target particles and absorbance is established.

[0014] In some embodiments, the method further includes:

[0015] The real-time measurement phase includes:

[0016] Acquire real-time light intensity signals of the environment under test; perform concentration inversion;

[0017] In the test environment, a laser emitting unit and a photoelectric detection unit with the same wavelength and optical path are arranged. The laser beam penetrates the test area in the air of the test environment, and the photoelectric detector receives the transmitted light intensity signal after attenuation through the test area in real time.

[0018] The acquired real-time transmitted light intensity signal is substituted into the standard concentration-absorbance curve to obtain the real-time concentration value of the target particles in the measurement section. By scanning the section one by one or measuring the section at multiple spatial locations, the concentration values ​​obtained by measurement inversion are fused according to their spatial coordinates to draw a concentration distribution map of the target particles in the environment to be measured.

[0019] In some embodiments, the method for selecting the preset wavelength includes:

[0020] The optical characteristic spectrum of the target particles is obtained, and the wavelength in which the target particles have significant absorption or scattering characteristics in this band and the optical response is most different from that of common interfering particles in the environment is selected as the preset wavelength.

[0021] In some embodiments, the preset wavelength is the green light band or the red light band.

[0022] In some embodiments, the emitting end of the linear laser source is provided with a beam shaping and homogenizing component for shaping the Gaussian distributed beam output by the laser into a linear spot with uniform energy distribution along the line direction. The beam shaping and homogenizing component includes one or more combinations of cylindrical lenses, microlens arrays, and diffractive optical elements, for reducing energy fluctuations of the linear spot along its long axis.

[0023] In some embodiments, the front end of the photodetector is provided with a slit aperture that matches the shape of the linear light spot, and the long axis of the slit aperture is aligned with the long axis of the linear light spot. The length of the slit aperture is not less than the projected length of the linear light spot on the detection surface, and its width is limited according to the laser beam diffusion angle, so that the detector can effectively receive the transmitted light spot while suppressing the entry of ambient stray light.

[0024] In some embodiments, a narrowband filter is mounted on the front end of the photodetector, and the center transmission wavelength of the narrowband filter matches the laser wavelength of the preset wavelength.

[0025] In some embodiments, the pre-calibration stage further includes:

[0026] Concentration-absorbance standard curves of the target particulate matter were established under different temperature and humidity conditions, and corresponding temperature and humidity correction coefficient matrices were generated.

[0027] The real-time measurement phase further includes:

[0028] The temperature and humidity parameters of the environment under test are collected simultaneously. Based on the current environmental parameters, the corresponding correction coefficient is called to dynamically correct the standard concentration-absorbance curve before concentration inversion is performed.

[0029] In some embodiments, the method further includes:

[0030] Before each measurement, the laser emitting unit is turned off, and the photodetector measures and records the background signal generated by the current ambient light and the dark current of the detector. During real-time measurement, the background signal is subtracted from the total measured signal to obtain the pure laser intensity signal.

[0031] In some embodiments, background reference regions are set at multiple spatial locations on the measurement cross section to acquire environmental background signals at different locations. During real-time measurement, a spatial background baseline distribution model is established based on the background signals from the multiple background reference regions, and spatial non-uniform background subtraction is performed on the transmitted light intensity signal.

[0032] Secondly, this application provides a rapid particulate matter concentration measurement system based on surface scanning extinction method, the system comprising:

[0033] The calibration unit includes a sealed mixing chamber, a first laser emitter, a first photodetector, and a first control and data processing computer, used to perform the pre-calibration stage and construct and store a standard concentration-absorbance curve;

[0034] The measurement unit, deployed in the environment under test, includes a second laser emitter, a second photodetector, and a second control and data processing computer. The optical parameters of the second laser emitter and the second photodetector are consistent with the optical parameters of the first laser emitter and the first photodetector. The second control and data processing computer is consistent with the first control and data processing computer of the calibration unit and is used to perform the real-time measurement phase and acquire real-time signals.

[0035] The processing unit is communicatively connected to the calibration unit and the measurement unit, and is used to substitute the real-time transmitted light intensity signal into the standard concentration-absorbance curve to perform concentration inversion and generate a concentration distribution map.

[0036] Thirdly, this application provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method steps provided in the first aspect of this application.

[0037] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method steps provided in the first aspect of this application.

[0038] Fifthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the method steps provided in the first aspect of this application.

[0039] The rapid particulate matter concentration measurement method and system based on surface scanning extinction method provided above have the following significant advantages compared to existing technologies:

[0040] Traditional extinction methods often employ point light sources for single-point measurements. To obtain spatial distribution, point-by-point scanning is necessary; however, this method is significantly time-consuming, has a long data acquisition cycle, and the single-point measurement result only represents the local concentration along a single path traversed by the beam, making it difficult to accurately characterize the average concentration level of the region. This application utilizes a linear laser light source, where the linear spot illuminates the measurement cross-section in a single pass. The detector receives the integrated transmitted light intensity of all spatial points along that cross-section, obtaining the average concentration of that cross-section in a single measurement. The integration measurement principle naturally smooths out signal fluctuations caused by the localized random distribution of particulate matter, resulting in a more realistic and stable reflection of the overall concentration level of the measured cross-section. It also exhibits strong resistance to local interference and provides more representative data.

[0041] Existing laser / optical imaging surface scanning technologies primarily employ sheet lasers or LED surface light sources for illumination, combined with a CCD array camera to acquire two-dimensional images of scattered or transmitted light distribution. Their physical basis relies on Mie scattering theory or empirical models. The relationship between scattered light intensity and particulate matter concentration is influenced by multiple parameters such as particle size distribution and particle shape. The inversion process requires complex multivariate physical models, probabilistic statistics, and iterative algorithms, or the establishment of empirical mapping relationships through polynomial fitting, resulting in significant uncertainties in the measurement results. Furthermore, achieving high-quality imaging requires high-resolution industrial cameras, precision synchronous controllers, and high-performance image processing units, leading to complex system configurations, high costs, and operation in darkrooms or under strictly controlled background light conditions, making it difficult to meet the needs of online, rapid, and low-cost monitoring. The method adopted in this application is based on the explicit physical relationship of the Lambert-Beer law, directly correlated with particulate matter mass concentration by measuring the attenuation of the transmitted light intensity through line integral. The "concentration-absorbance" standard curve established in the pre-calibration stage has clear physical meaning and a good linear relationship. In real-time measurement, the measured absorbance value can be substituted into the curve to directly and quickly obtain the mass concentration value without complex models and iterative calculations. The inversion process is simple and highly deterministic. Moreover, the core measurement units are a laser and a photodetector, eliminating the need for expensive imaging systems.

[0042] In summary, this application employs a linear laser light source for surface scanning, obtaining the integrated transmitted light intensity at all spatial points on the measurement cross-section in a single measurement, thereby obtaining the average concentration of that cross-section. By setting an independent pre-calibration stage, a precise "concentration-absorbance" standard curve for the target particulate matter, free from environmental interference, is established under controllable conditions. In actual measurement, the optical measurement problem under complex environments is transformed into a direct inversion problem matched with pre-calibration conditions. This method effectively overcomes the influence of variable particulate matter characteristics and environmental interference on direct measurement, achieving rapid and accurate measurement of the concentration of specific target particulate matter. Furthermore, it can intuitively present the spatial distribution characteristics through cross-sectional scanning measurement or multi-spatial-location cross-sectional measurement, providing a reliable technical means for accurately identifying the core pollution area and diffusion range. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a flowchart of a rapid particulate matter concentration measurement method based on surface scanning extinction in one embodiment;

[0045] Figure 2 This is a detailed schematic diagram illustrating the steps involved in constructing a standard concentration-absorbance curve during the pre-calibration stage in one embodiment.

[0046] Figure 3 This is a schematic diagram illustrating the steps of concentration inversion and spatial distribution during the real-time measurement phase in one embodiment.

[0047] Figure 4 This is a structural block diagram of a rapid particulate matter concentration measurement system based on the surface scanning extinction method in one embodiment;

[0048] Figure 5 Standard curve of cigarette smoke particulate matter concentration-absorbance;

[0049] Figure 6 This is a standard curve of kitchen oil fume particulate matter concentration-absorbance. Detailed Implementation

[0050] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In one exemplary embodiment, such as Figure 1As shown, this application provides a rapid measurement method for particulate matter concentration based on surface scanning extinction method. The method consists of two core parts: a pre-calibration stage S200 and a real-time measurement stage S300.

[0053] First, combined Figure 2 The pre-calibration stage S200 is described in detail. The goal of this stage is to establish a standard concentration-absorbance curve for the target particulate matter, specifically including steps S202 to S212. Wherein:

[0054] Step S202: A sealed mixing chamber is provided, which is equipped with the function of uniformly mixing particulate matter. A target particulate matter sample of a certain concentration is introduced into the mixing chamber, and its mass concentration is measured simultaneously.

[0055] Step S204: Using a monochromatic linear laser with stable wavelength and output power as the light source, the laser beam emitted by the laser is collimated and horizontally incident and penetrates a pre-set, fixed entire measurement cross section on the calibration mixing cavity.

[0056] For example, the laser wavelength can be selected in the near-infrared band to reduce ambient light interference.

[0057] In step S206, a photodetector is placed on the outgoing optical path after the laser beam penetrates the mixing cavity. This detector is connected to a data processing unit. The data processing unit runs signal observation software that can receive, display, and record the voltage signal output by the detector in real time. This voltage signal is proportional to the intensity of the received transmitted light.

[0058] Step S208: Activate the mixing mechanism to ensure uniform distribution of particulate matter within the cavity. Monitor the voltage signal in real time using the signal observation software. When the signal fluctuation amplitude is less than a preset stability threshold, the concentration field is determined to be uniform and stable. At this point, record the current known particulate matter concentration. The corresponding stable voltage signal value This value This characterizes the transmitted light intensity at this concentration. .

[0059] Step S210: Change the concentration of the target particulate matter introduced into the mixing chamber, and repeat steps S202 to S208 to obtain a series of concentration points covering the expected measurement range. and its corresponding stable voltage signal value .

[0060] Step S212: Data processing and curve construction. First, background subtraction is performed: with the mixing chamber clean, the initial voltage signal when there are no particulate matter is recorded. Then, for each concentration point Calculate its absorbance. Absorbance Subsequently, based on the Lambert-Beer law, the concentration was... With absorbance Linear fitting was performed to obtain a smooth standard concentration-absorbance curve.

[0061] Next, combined Figure 3 The real-time measurement stage S300 is described in detail below. This stage utilizes the pre-calibrated results to perform rapid measurements in a real-world environment, specifically including the following steps S302 to S308. Wherein:

[0062] Step S302: Deploy the measurement optical path in the area that actually needs to be monitored. The model, laser wavelength, optical window, and other parameters of the laser emitting unit and photoelectric detection unit of this optical path should be consistent with the equipment used in the pre-calibration stage. The laser emitting unit also generates a line beam that will penetrate the air region to be measured.

[0063] Furthermore, compared to the traditional point-source extinction method, the core improvement of this embodiment lies in the use of a linear light source. Its advantage is that the signal received by the detector is the integrated transmitted light intensity after the beam passes through the particle field at all points along a line. This is equivalent to measuring the average concentration of the measurement cross-section in a single measurement, avoiding the random errors of single-point measurements, and characterizing the concentration distribution of a cross-section with fewer scans, greatly improving measurement efficiency and representativeness.

[0064] Step S304: The transmitted light intensity signal of the area to be measured is acquired in real time through the photodetector and the connected data processing unit, and converted into a real-time voltage signal value. Signal stability can be observed through the software interface.

[0065] Step S306, concentration inversion. The measured concentration... The standard curve for value substitution in the call.

[0066] Specifically, first calculate the current absorbance. ,in The clean background signal is measured in advance in the current environment, and then the real-time concentration value of the target particulate matter is directly calculated based on the functional relationship represented by the curve. .

[0067] Step S308: Spatial distribution acquisition.

[0068] In some embodiments, to obtain a spatial distribution map of particulate matter, the entire measurement optical path device in step S302 can be moved along a certain path, and measurements can be repeated at different spatial locations to obtain the average concentration value of the corresponding cross-section at each location. The processing unit generates a two-dimensional or three-dimensional concentration distribution map of the area to be measured based on the spatial coordinates of each cross-section and the inverted concentration, using interpolation fitting or a spatial smoothing algorithm.

[0069] In some embodiments, to obtain a spatial distribution map of particulate matter, multiple sets of measurement optical paths with consistent optical parameters can be deployed in parallel to simultaneously acquire the transmitted light intensity signal of each cross-section and perform independent concentration inversion. The data processing unit correlates and fuses the concentration values ​​of all measurement cross-sections with their spatial coordinates to generate a concentration distribution map reflecting the spatial distribution characteristics of particulate matter;

[0070] In some embodiments, to improve the spatial resolution of the concentration distribution in a two-dimensional cross-section, multiple sets of linear light sources and photodetectors can be arranged in different directions to acquire line integral transmitted light intensity data at multiple angles. Based on the multi-angle line integral transmitted light intensity data, the data processing unit uses a filtered back-projection algorithm or an algebraic reconstruction algorithm to perform tomographic reconstruction of the particulate matter concentration distribution of the cross-section under test.

[0071] In some embodiments, when the number of measurement optical paths is limited, a compressed sensing reconstruction algorithm can be used to reconstruct the high-resolution concentration field from a limited number of line integral measurement data based on the assumption of spatial sparsity or smoothness of the particulate matter concentration field.

[0072] In some embodiments, for a particulate matter concentration field that changes over time, the processing unit establishes a state-space model of the concentration field and recursively updates it by combining the current measurement value with the historical concentration distribution estimate, thereby realizing real-time tracking of the dynamic concentration field.

[0073] Collect the spatial coordinates (X, Y, Z) of all measurement points and the concentration values ​​obtained from their inversion. Data processing software is used to generate two-dimensional concentration contour maps or three-dimensional concentration cloud maps.

[0074] Secondly, such as Figure 4 As shown, this application also provides a system for implementing the above method. The system 400 includes a calibration unit 401, a measurement unit 402, and a processing unit 403.

[0075] The calibration unit 401 includes a sealed mixing cavity, a first laser capable of generating a linear beam, a first photodetector, and a first control and data processing computer. The computer is equipped with signal observation and calibration software used to control the calibration process, record data, and construct a standard curve.

[0076] The measurement unit 402 includes a second laser, a second photodetector, and a second data processing computer deployed on-site to generate a linear beam of light. The optical specifications of the second laser and the second photodetector are the same as those of the first laser and the first photodetector. The second data processing computer is used to acquire on-site signals.

[0077] The processing unit 403 loads the acquired signal obtained by the measurement unit 402 into the curve through the data interface and performs concentration inversion and distribution map generation.

[0078] In one embodiment, to verify the applicability of this method to actual aerosol particles, two typical aerosol particles, cigarette smoke and kitchen fumes, were selected for testing.

[0079] During the test, the same measurement system as the pre-calibration stage was used to calibrate the concentration gradient of the two types of particulate matter in a sealed mixing chamber, and the real-time concentration of oil fume particulate matter was measured under simulated real-world environmental conditions.

[0080] like Figure 5 and Figure 6 The figures show the experimental data of concentration-absorbance standard curves for cigarette smoke particles and kitchen fumes particles, respectively. The data points clearly demonstrate a good linear relationship between the mass concentration of the target particles and their corresponding absorbance, consistent with the expected Lambert-Beer Law, thus verifying the accuracy and reliability of the standard curves established by this method. Based on these standard curves, the concentration of the target particles can be quickly and accurately determined in actual measurements.

[0081] Thirdly, this application provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method steps provided in the first aspect of this application.

[0082] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method steps provided in the first aspect of this application.

[0083] Fifthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the method steps provided in the first aspect of this application.

[0084] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A rapid method for measuring particulate matter concentration based on surface scanning extinction method, characterized in that, include: In the pre-calibration stage, a linear laser beam is used to penetrate the measurement area of ​​the mixing cavity to obtain the transmitted light intensity signal of the target particles at different known concentrations, and a standard concentration-absorbance curve is established between concentration and absorbance. In the real-time measurement stage, a linear laser beam generated in the same manner as in the pre-calibration stage penetrates the environment to be measured, obtains the real-time transmitted light intensity signal, obtains the corresponding real-time absorbance, and directly obtains the real-time concentration of the target particulate matter by querying the standard concentration-absorbance curve. The transmitted light intensity signal is the integrated transmitted light intensity signal of all spatial points on the linear region.

2. The method according to claim 1, characterized in that, The pre-calibration stage includes: The target particulate matter is introduced into a sealed mixing chamber and mixed evenly. A monochromatic linear laser beam of a preset wavelength is used to penetrate a fixed measurement section of the mixing cavity; On the emitting side of the laser beam, a photodetector is used to receive the transmitted light intensity signal; By changing the concentration of the target particulate matter introduced, recording the transmitted light intensity at different concentrations, and calculating the corresponding absorbance; Based on the Lambert-Beer law, a standard correlation curve between the concentration of target particulate matter and absorbance is established.

3. The method according to claim 1 or 2, characterized in that, The real-time measurement phase includes: In the test environment, a laser emitting unit and a photoelectric detection unit with the same wavelength and optical path as those in the pre-calibration stage are arranged. The laser beam penetrates the test area in the air of the test environment, and the photoelectric detector receives the transmitted light intensity signal after attenuation through the test area in real time. By continuously moving the linear laser beam or deploying multiple linear laser beams, real-time concentration values ​​at different locations in the environment under test are obtained, and a concentration distribution map of the target particles is drawn.

4. The method according to claim 2, characterized in that, The method for selecting the preset wavelength includes: The optical characteristic spectrum of the target particles is obtained, and the wavelength in which the target particles have significant absorption or scattering characteristics in this band and the optical response is most different from that of common interfering particles in the environment is selected as the preset wavelength.

5. The method according to claim 4, characterized in that, The preset wavelength is either the green light band or the red light band.

6. The method according to claim 2, characterized in that, A narrowband filter is installed at the front end of the photodetector, and the center wavelength of the narrowband filter is matched with the laser wavelength of the preset wavelength.

7. The method according to claim 1, characterized in that, The method also includes a background subtraction step: Before each measurement, the laser emitting unit is turned off, and the photodetector measures and records the current ambient light and the background signal generated by the dark current of the detector. In real-time measurement, the background signal is subtracted from the measured total signal to obtain the pure laser transmitted light intensity signal.

8. A rapid particulate matter concentration measurement system based on the extinction method, characterized in that, The system for implementing the method as described in any one of claims 1-7 comprises: The calibration unit includes a sealed mixing chamber, a first laser emitter capable of generating a linear beam, a first photodetector, and a first control and data processing computer, used to perform the pre-calibration stage, construct and store the standard concentration-absorbance curve; The measurement unit, deployed in the environment to be measured, includes a second laser emitter capable of generating a linear beam, a second photodetector, and a second control and data processing computer, used to perform the real-time measurement phase and acquire real-time transmitted light intensity signals; the optical parameters of the second laser emitter and the second photodetector are consistent with the optical parameters of the first laser emitter and the first photodetector. The processing unit is communicatively connected to the calibration unit and the measurement unit, and is used to substitute the real-time transmitted light intensity signal into the standard concentration-absorbance curve to perform concentration inversion and generate a concentration distribution map.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method as described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method as described in any one of claims 1 to 7.

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