Aerosol particle concentration measurement method, device, apparatus and medium

Abstract

The embodiment of the application discloses a kind of aerosol particle concentration measurement method, device, equipment and medium, the measurement method is first controlled one first incident light signal is incident to the gas cavity of aerosol particle concentration to be measured, and the first transmission light signal of the aerosol particle concentration to be measured is collected, then according to the incident light intensity of first incident light signal and the transmission light intensity of first transmission light signal, and the preset mapping relationship of incident light intensity, transmission light intensity and aerosol particle concentration, determine the concentration of aerosol particle concentration to be measured.Using the above method, the concentration of aerosol particle is calibrated and calculated based on light transmission method, to determine the concentration of aerosol particle concentration to be measured, realize the high-precision measurement and real-time measurement of aerosol particle concentration, simplify the measurement step and operation of aerosol particle concentration, applicable to environmental monitoring, industrial emission monitoring and many other fields, with wide application prospect and significant practical value.

Description

Technical Field

[0001] This invention relates to the field of aerosol concentration detection technology, and in particular to a method, apparatus, equipment and medium for measuring aerosol particle concentration. Background Technology

[0002] In recent decades, scientific research has focused more on the mesoscopic realm, which lies between the macroscopic and microscopic worlds, namely aerosol particles. Aerosols are dispersion systems in which solid or liquid particles are dispersed in a gas, with particle sizes typically ranging from 1 nm to 100 μm. Accurate measurement of aerosol particle concentration is of great significance in various fields.

[0003] Current methods for detecting aerosol particle concentration can be broadly categorized into two types: sampling methods (e.g., membrane gravimetric analysis, beta-ray absorption, piezoelectric crystal analysis, micro-oscillation balance analysis, etc.) and non-sampling methods (e.g., light transmission, light scattering, blackness analysis, etc.). Among these, laser scattering and membrane gravimetric analysis are relatively typical and commonly used. However, laser scattering is significantly affected by the shape and refractive index of aerosol particles, while membrane gravimetric analysis cannot calculate aerosol particle concentration in real time, resulting in shortcomings in measurement accuracy and real-time performance, and the measurement equipment is also relatively complex. Summary of the Invention

[0004] This invention provides a method, apparatus, device, and medium for measuring aerosol particle concentration. Based on the optical transmission method, the aerosol particle concentration is calibrated and calculated, aiming to achieve high-precision, real-time detection of aerosol particle concentration and simplify the measurement steps and operations.

[0005] In a first aspect, embodiments of the present invention provide a method for measuring the concentration of aerosol particles, comprising:

[0006] A first incident light signal is controlled to be incident into the gas chamber where the aerosol particles of the concentration to be measured are located, and the first transmitted light signal passing through the aerosol particles of the concentration to be measured is collected.

[0007] The concentration of the aerosol particles to be measured is determined based on the incident light intensity of the first incident light signal, the transmitted light intensity of the first transmitted light signal, and the preset mapping relationship between the incident light intensity, the transmitted light intensity and the aerosol particle concentration.

[0008] Optionally, before determining the concentration of the aerosol particles to be measured based on the incident light intensity of the first incident light signal, the transmitted light intensity of the first transmitted light signal, and a preset mapping relationship between the incident light intensity, the transmitted light intensity, and the aerosol particle concentration, the method further includes:

[0009] Multiple second incident light signals are controlled to be incident on the gas chambers where aerosol particles of known concentration are located, and the second transmitted light signals transmitted through each aerosol particle of known concentration are collected respectively; wherein, the concentrations of the aerosol particles of known concentration are different from each other.

[0010] Based on the incident light intensity of the second incident light signal and the transmitted light intensity of the second transmitted light signal, a preset mapping relationship between the incident light intensity, the transmitted light intensity, and the aerosol particle concentration is established.

[0011] Optionally, based on the incident light intensity of the second incident light signal and the transmitted light intensity of the second transmitted light signal, a preset mapping relationship between the incident light intensity, the transmitted light intensity, and the aerosol particle concentration is calibrated, including:

[0012] Based on the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal, a preset mapping relationship between the incident light intensity, the transmitted light intensity, and the aerosol particle concentration is determined.

[0013] Optionally, based on the incident light intensity of the second incident light signal and the transmitted light intensity of the second transmitted light signal, a preset mapping relationship between the incident light intensity, the transmitted light intensity, and the aerosol particle concentration is calibrated, including:

[0014] Based on the logarithm of the first ratio to base 10, a preset mapping relationship between incident light intensity, transmitted light intensity and aerosol particle concentration is determined; wherein, the first ratio is the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal.

[0015] Optionally, based on the base-10 logarithmic value of the first ratio, a preset mapping relationship between incident light intensity, transmitted light intensity, and aerosol particle concentration is determined, including:

[0016] Based on the calculation formula C=-[lg(I1 / I0)] / k, the preset mapping relationship between incident light intensity, transmitted light intensity and aerosol particle concentration is determined; where C represents the concentration of aerosol particles of known concentration, I0 represents the incident light intensity of the second incident light signal, I1 represents the transmitted light intensity of the second transmitted light signal, and k represents the linear mapping coefficient.

[0017] Optionally, the concentration of the aerosol particles to be measured is determined based on the incident light intensity of the first incident light signal, the transmitted light intensity of the first transmitted light signal, and a preset mapping relationship between the incident light intensity, the transmitted light intensity, and the aerosol particle concentration, including:

[0018] The concentration D of the aerosol particles to be measured is determined according to the calculation formula D=-[lg(I3 / I2)] / k; where I2 represents the incident light intensity of the first incident light signal and I3 represents the transmitted light intensity of the first transmitted light signal.

[0019] Optionally, based on the incident light intensity of the second incident light signal and the transmitted light intensity of the second transmitted light signal, a preset mapping relationship between the incident light intensity, the transmitted light intensity, and the aerosol particle concentration is calibrated, including:

[0020] The correspondence between each first ratio and the concentration of the corresponding known aerosol particles is defined as a coordinate point, and curve fitting is performed to obtain the preset mapping relationship between incident light intensity, transmitted light intensity and aerosol particle concentration; wherein, the first ratio is the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal.

[0021] Secondly, embodiments of the present invention also provide a device for measuring aerosol particle concentration, comprising:

[0022] The signal acquisition module is used to control a first incident light signal to be incident on the gas chamber where the aerosol particles of the concentration to be measured are located, and to acquire the first transmitted light signal that passes through the aerosol particles of the concentration to be measured.

[0023] The concentration measurement module is used to determine the concentration of the aerosol particles to be measured based on the incident light intensity of the first incident light signal and the transmitted light intensity of the first transmitted light signal, as well as the preset mapping relationship between the incident light intensity, the transmitted light intensity and the aerosol particle concentration.

[0024] Thirdly, embodiments of the present invention also provide a terminal device, including:

[0025] One or more processors;

[0026] Storage device for storing one or more programs;

[0027] When one or more programs are executed by one or more processors, the one or more processors implement a method for measuring aerosol particle concentration as provided in any of the first aspects.

[0028] Fourthly, embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a method for measuring aerosol particle concentration as provided in any of the first aspects.

[0029] This invention provides a method, apparatus, device, and medium for measuring aerosol particle concentration. The method first controls a first incident light signal to be incident into a gas chamber containing aerosol particles of the desired concentration, and collects a first transmitted light signal transmitted through the aerosol particles. Then, based on the incident light intensity and transmitted light intensity of the first incident light signal, as well as a preset mapping relationship between the incident light intensity, transmitted light intensity, and aerosol particle concentration, the concentration of the aerosol particles of the desired concentration is determined. Using this method, aerosol particle concentration is calibrated and calculated based on the light transmission method. By analyzing and comparing the incident light intensity and transmitted light intensity of the first incident light signal with the preset mapping relationship, the concentration of the aerosol particles of the desired concentration is determined. This achieves high-precision and real-time measurement of aerosol particle concentration, simplifies the measurement steps and operations, and is applicable to multiple fields such as environmental monitoring and industrial emission monitoring, showing broad application prospects and significant practical value. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic flowchart of a method for measuring aerosol particle concentration provided in an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of an aerosol particle concentration measurement system provided in an embodiment of the present invention;

[0033] Figure 3 This is a schematic flowchart of another method for measuring aerosol particle concentration provided in an embodiment of the present invention;

[0034] Figure 4 This is a schematic flowchart of another method for measuring aerosol particle concentration provided in an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the structure of an aerosol particle concentration measuring device provided in an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the structure of a terminal device provided in an embodiment of the present invention.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1-Light source; 2-Photodetector; 3-Gas chamber. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0040] The terminology used in the embodiments of this invention is for the purpose of describing specific embodiments only and is not intended to limit the invention. It should be noted that directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this invention are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this invention. Furthermore, in the context, it should be understood that when referring to an element being formed "on" or "below" another element, it can be formed not only directly on or below the other element, but also indirectly on or below it through intermediate elements. The terms "first," "second," etc., are used for descriptive purposes only and do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] The term "comprising" and its variations as used in this invention are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment".

[0042] It should be noted that the concepts of "first" and "second" mentioned in this invention are only used to distinguish the corresponding contents and are not used to limit the order or interdependence.

[0043] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0044] This invention provides a method for measuring aerosol particle concentration. This method is applicable to measuring the concentration of any type of aerosol particles. The method can be executed by an aerosol particle concentration measuring device, which can be implemented in hardware and / or software and can be integrated into a control board. Figure 1 As shown, the measurement method includes:

[0045] S110. Control a first incident light signal to be incident into the gas chamber where the aerosol particles of the concentration to be measured are located, and collect the first transmitted light signal that passes through the aerosol particles of the concentration to be measured.

[0046] Specifically, such as Figure 2 As shown, this embodiment provides a system for measuring aerosol particle concentration. The system includes a light source 1, a photodetector 2, and a gas chamber 3. The light source 1 and photodetector 2 are located on opposite sides of the gas chamber 3. The light source 1 emits a first incident light signal into the gas chamber 3 containing the aerosol particles of the concentration to be measured. This first incident light signal passes through the gas chamber 3. After being absorbed and scattered by the aerosol particles in the gas chamber 3, the photodetector 2 collects the corresponding first transmitted light signal. It is understood that, based on the light transmission method, because the first incident light signal is absorbed and scattered by the aerosol particles in the gas chamber 3, the intensity of the transmitted light signal changes. The difference between the incident light intensity and the transmitted light intensity also changes, facilitating the subsequent determination of the aerosol particle concentration in the gas chamber 3. For example, the higher the concentration of aerosol particles in the gas cavity 3, the greater the degree to which the first incident light signal is absorbed and scattered by the aerosol particles in the gas cavity 3, and the greater the difference between the incident light intensity of the first incident light signal and the transmitted light intensity of the corresponding first transmitted light signal. Conversely, the lower the concentration of aerosol particles in the gas cavity 3, the less the degree to which the first incident light signal is absorbed and scattered by the aerosol particles in the gas cavity 3, and the smaller the difference between the incident light intensity of the first incident light signal and the transmitted light intensity of the corresponding first transmitted light signal. For example, the light source 1 can be a laser, and the photodetector 2 can be a photodiode array.

[0047] S120. Based on the incident light intensity of the first incident light signal and the transmitted light intensity of the first transmitted light signal, as well as the preset mapping relationship between the incident light intensity, the transmitted light intensity and the aerosol particle concentration, determine the concentration of the aerosol particles to be measured.

[0048] Specifically, please refer to Figure 2 The measurement system also includes a host computer program ( Figure 2(Not shown in the image) The host computer program is electrically connected to the photodetector 2. After the photodetector 2 collects the corresponding first transmitted light signal, it can convert the optical signal of the collected first transmitted light signal into an electrical signal and transmit it to the host computer program. That is, the photodetector 2 can transmit the transmitted light intensity of the collected first transmitted light signal to the host computer program. After receiving the transmitted light intensity of the first transmitted light signal, the host computer program can determine the concentration of the aerosol particles to be measured based on the incident light intensity of the first incident light signal and the preset mapping relationship between the incident light intensity, the transmitted light intensity and the aerosol particle concentration. For example, the preset mapping relationship between incident light intensity, transmitted light intensity, and aerosol particle concentration is pre-set. This includes the specific correspondence between aerosol particle concentration and the incident light intensity of the corresponding first incident light signal, and the specific correspondence between the transmitted light intensity of the corresponding first transmitted light signal. Based on this preset mapping relationship, and the known and acquired incident light intensity and transmitted light intensity of the first transmitted light signal, the concentration of the aerosol particles to be measured can be determined. In this way, the various parts of the measurement system work together to achieve high-precision, real-time measurement of the aerosol particle concentration in the gas chamber 3. Furthermore, the host computer program also has a display function. After determining the concentration of the aerosol particles to be measured, the host computer program can also display the aerosol particle concentration to inform relevant users.

[0049] The technical solution in this embodiment of the invention involves a measurement method that first controls a first incident light signal to be incident into the gas chamber containing the aerosol particles of the concentration to be measured, and then collects the first transmitted light signal transmitted through the aerosol particles. Based on the incident light intensity of the first incident light signal, the transmitted light intensity of the first transmitted light signal, and a preset mapping relationship between the incident light intensity, the transmitted light intensity, and the aerosol particle concentration, the concentration of the aerosol particles is determined. Using this method, the aerosol particle concentration is calibrated and calculated based on the light transmission method. By analyzing and comparing the incident light intensity of the first incident light signal and the transmitted light intensity of the first transmitted light signal with the preset mapping relationship, the concentration of the aerosol particles is determined. This achieves high-precision and real-time measurement of aerosol particle concentration, simplifies the measurement steps and operations, and is applicable to multiple fields such as environmental monitoring and industrial emission monitoring, demonstrating broad application prospects and significant practical value.

[0050] This invention also provides a method for measuring aerosol particle concentration, which is an optimization based on the above embodiments. Optionally, before determining the concentration of the aerosol particles to be measured based on the incident light intensity of the first incident light signal, the transmitted light intensity of the first transmitted light signal, and a preset mapping relationship between the incident light intensity, the transmitted light intensity, and the aerosol particle concentration, the method further includes:

[0051] Multiple second incident light signals are controlled to be incident on the gas chambers where aerosol particles of known concentration are located, and the second transmitted light signals transmitted through each aerosol particle of known concentration are collected respectively; wherein, the concentrations of the aerosol particles of known concentration are different from each other.

[0052] Based on the incident light intensity of the second incident light signal and the transmitted light intensity of the second transmitted light signal, a preset mapping relationship between the incident light intensity, the transmitted light intensity, and the aerosol particle concentration is established.

[0053] For details not covered in this embodiment, please refer to the above embodiments. Figure 3 As shown, the measurement method includes:

[0054] S210. Control multiple second incident light signals to be incident on the gas chambers where the aerosol particles of the corresponding known concentration are located, and collect the second transmitted light signals that pass through each aerosol particle of the known concentration; wherein the concentrations of the aerosol particles of the known concentrations are different from each other.

[0055] Specifically, before measuring the concentration of aerosol particles of the desired concentration, it is necessary to calibrate the aforementioned preset mapping relationship using the known concentrations of aerosol particles and the specific values ​​of the incident light intensity of the corresponding second incident light signal and the transmitted light intensity of the corresponding second transmitted light signal. That is, by calibrating the projection of multiple aerosol particles of different concentrations onto the second incident light signal and the second transmitted light signal, a more accurate preset mapping relationship between the incident light intensity, transmitted light intensity, and aerosol particle concentration can be obtained, thereby improving the accuracy and reliability of the concentration measurement of the aerosol particles of the desired concentration.

[0056] For example, continue to refer to Figure 2 This measurement system can also be used for calibration. A series of aerosol particles of known concentration can be prepared. Based on the light transmission method, light source 1 emits a second incident light signal towards the gas cavity 3 containing the aerosol particles of known concentration. This second incident light signal passes through the gas cavity 3. After being absorbed and scattered by the aerosol particles in the gas cavity 3, the photodetector 2 can collect the corresponding second transmitted light signal. By sequentially performing the above calibration process, multiple sets of correlations can be collected between the concentrations of aerosol particles of known concentration, the incident light intensity of the corresponding second incident light signal, and the transmitted light intensity of the corresponding second transmitted light signal. This allows for the subsequent determination of a preset mapping relationship between the incident light intensity, transmitted light intensity, and aerosol particle concentration based on these data.

[0057] Furthermore, it should be noted that the aerosol particles of the concentration to be measured mentioned in this embodiment can be of the same type as aerosol particles of known concentration. The first incident light signal and the second incident light signal mentioned in this embodiment can be completely identical light signals. The first transmitted light signal and the second transmitted light signal mentioned in this embodiment are both light signals after absorption and scattering by the aerosol particles in the gas chamber 3; only their corresponding measurement or calibration processes differ. Exemplarily, the first incident light signal and the second incident light signal mentioned in this embodiment can be the same or different; this embodiment does not impose any limitations on this.

[0058] S220. Based on the incident light intensity of the second incident light signal and the transmitted light intensity of the second transmitted light signal, a preset mapping relationship between the incident light intensity, the transmitted light intensity and the aerosol particle concentration is established.

[0059] In one specific embodiment, optionally, a preset mapping relationship between incident light intensity, transmitted light intensity and aerosol particle concentration is calibrated based on the incident light intensity of the second incident light signal and the transmitted light intensity of the second transmitted light signal, including: determining the preset mapping relationship between incident light intensity, transmitted light intensity and aerosol particle concentration based on the difference between the transmitted light intensity of the second transmitted light signal and the incident light intensity of the second incident light signal.

[0060] Understandably, continue to refer to Figure 2 Based on the light transmission method, because the second incident light signal is absorbed and scattered by aerosol particles in the gas cavity 3, the transmitted light intensity of the corresponding second transmitted light signal will change, and the difference between the transmitted light intensity of the second transmitted light signal and the incident light intensity of the corresponding second incident light signal will also change. For example, the higher the concentration of aerosol particles in the gas cavity 3, the greater the degree to which the second incident light signal is absorbed and scattered by the aerosol particles in the gas cavity 3, and the greater the difference between the transmitted light intensity of the second transmitted light signal and the incident light intensity of the corresponding second incident light signal. Conversely, the lower the concentration of aerosol particles in the gas cavity 3, the less the degree to which the second incident light signal is absorbed and scattered by the aerosol particles in the gas cavity 3, and the smaller the difference between the transmitted light intensity of the second transmitted light signal and the incident light intensity of the corresponding second incident light signal.

[0061] Specifically, a preset mapping relationship between incident light intensity, transmitted light intensity, and aerosol particle concentration can be determined based on the difference between the transmitted light intensity of the second transmitted light signal and the incident light intensity of the second incident light signal. This preset mapping relationship can be understood as a one-to-one correspondence between the concentration of aerosol particles and the difference between the transmitted light intensity of the second transmitted light signal and the incident light intensity of the second incident light signal. That is, after determining the specific value of the difference between the transmitted light intensity of the second transmitted light signal and the incident light intensity of the second incident light signal, the concentration of aerosol particles in the gas cavity 3 can be uniquely determined based on this preset mapping relationship.

[0062] In another specific embodiment, optionally, a preset mapping relationship between incident light intensity, transmitted light intensity and aerosol particle concentration is calibrated based on the incident light intensity of the second incident light signal and the transmitted light intensity of the second transmitted light signal, including: determining the preset mapping relationship between incident light intensity, transmitted light intensity and aerosol particle concentration based on the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal.

[0063] Understandably, continue to refer to Figure 2 Based on the light transmission method, because the second incident light signal is absorbed and scattered by aerosol particles in the gas cavity 3, the transmitted light intensity of the corresponding second transmitted light signal will change. The difference between the incident light intensity and the transmitted light intensity of the corresponding second transmitted light signal will also change, as will the ratio of the transmitted light intensity to the incident light intensity. For example, the higher the concentration of aerosol particles in the gas cavity 3, the greater the degree of absorption and scattering of the second incident light signal by the aerosol particles, and the smaller the ratio of the transmitted light intensity to the incident light intensity. Conversely, the lower the concentration of aerosol particles in the gas cavity 3, the less the degree of absorption and scattering of the second incident light signal, and the larger the ratio of the transmitted light intensity to the incident light intensity.

[0064] Specifically, a preset mapping relationship between incident light intensity, transmitted light intensity, and aerosol particle concentration can be determined based on the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal. This preset mapping relationship can be understood as a one-to-one correspondence between the concentration of aerosol particles and the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal. That is, after determining the specific value of the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal, the concentration of aerosol particles in the gas cavity 3 can be uniquely determined based on this preset mapping relationship.

[0065] In another specific embodiment, optionally, a preset mapping relationship between incident light intensity, transmitted light intensity, and aerosol particle concentration is established based on the incident light intensity of the second incident light signal and the transmitted light intensity of the second transmitted light signal. This includes: determining the preset mapping relationship between incident light intensity, transmitted light intensity, and aerosol particle concentration based on the logarithm of the first ratio to base 10; wherein the first ratio is the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal. Further, determining the preset mapping relationship between incident light intensity, transmitted light intensity, and aerosol particle concentration based on the logarithm of the first ratio to base 10 includes: determining the preset mapping relationship between incident light intensity, transmitted light intensity, and aerosol particle concentration based on the calculation formula C = -[lg(I1 / I0)] / k; wherein C represents the concentration of aerosol particles of known concentration, I0 represents the incident light intensity of the second incident light signal, I1 represents the transmitted light intensity of the second transmitted light signal, and k represents the linear mapping coefficient.

[0066] Understandably, to further improve the calibration process and reduce its difficulty, a pre-defined mapping relationship for the proportional relationships can be obtained. (Continue to refer to...) Figure 2 Based on the light transmission method, because the second incident light signal is absorbed and scattered by aerosol particles in the gas cavity 3, the transmitted light intensity of the corresponding second transmitted light signal will change. The ratio of the transmitted light intensity to the incident light intensity will also change, as will the base-10 logarithm of this ratio. For example, the higher the concentration of aerosol particles in the gas cavity 3, the greater the degree to which the second incident light signal is absorbed and scattered by the aerosol particles in the gas cavity 3. Consequently, the ratio of the transmitted light intensity to the incident light intensity will be smaller, and the base-10 logarithm of this ratio will also be smaller. Furthermore, the lower the concentration of aerosol particles in the gas cavity 3, the less the second incident light signal is absorbed and scattered by the aerosol particles in the gas cavity 3, the larger the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the corresponding second incident light signal, and the larger the logarithm of the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the corresponding second incident light signal to be to the base 10.

[0067] Specifically, a preset mapping relationship between incident light intensity, transmitted light intensity, and aerosol particle concentration can be determined based on the logarithm of the first ratio to the base 10. This preset mapping relationship can be understood as a one-to-one correspondence between the concentration of aerosol particles and the logarithm of the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal, to the base 10 logarithm. That is, after determining the specific value of the logarithm of the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal, the concentration of aerosol particles in the gas chamber 3 can be uniquely determined based on this preset mapping relationship.

[0068] Furthermore, according to the Lambert-Beer law, under the condition that other factors remain unchanged, the incident light intensity of the second incident light signal is I0, and the corresponding transmitted light intensity of the second transmitted light signal is I1. The ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal is I1 / I0. Let's assume: A = lg(I1 / I0), and A = k × C, where k represents the linear mapping coefficient. This establishes a linear relationship between the base-10 logarithm A of the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal and the concentration C of the aerosol particles. By calculating the concentration C of each known aerosol particle (which can be C1, C2, C3, etc.) and the base-10 logarithm A of the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal (which can be A1, A2, A3, etc.), the value of the linear mapping coefficient k can be determined. The calculation formula C=-[lg(I1 / I0)] / k can be understood as a preset mapping relationship between incident light intensity, transmitted light intensity and aerosol particle concentration. It includes a one-to-one correspondence between the concentration of aerosol particles and the logarithm of the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal, with the logarithm based on base 10.

[0069] In another specific embodiment, optionally, a preset mapping relationship between incident light intensity, transmitted light intensity and aerosol particle concentration is calibrated based on the incident light intensity of the second incident light signal and the transmitted light intensity of the second transmitted light signal. This includes: defining the correspondence between each first ratio and the concentration of aerosol particles of a known concentration as coordinate points, and performing curve fitting to obtain the preset mapping relationship between incident light intensity, transmitted light intensity and aerosol particle concentration; wherein, the first ratio is the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal.

[0070] Understandably, continue to refer to Figure 2Based on the light transmission method, because the second incident light signal is absorbed and scattered by aerosol particles in the gas cavity 3, the transmitted light intensity of the corresponding second transmitted light signal will change. The difference between the incident light intensity and the transmitted light intensity of the corresponding second transmitted light signal will also change, as will the ratio of the transmitted light intensity to the incident light intensity. For example, the higher the concentration of aerosol particles in the gas cavity 3, the greater the degree of absorption and scattering of the second incident light signal by the aerosol particles, and the smaller the ratio of the transmitted light intensity to the incident light intensity. Conversely, the lower the concentration of aerosol particles in the gas cavity 3, the less the degree of absorption and scattering of the second incident light signal, and the larger the ratio of the transmitted light intensity to the incident light intensity.

[0071] Specifically, the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal can be defined as the first ratio. The correspondence between each first ratio and the concentration of the corresponding known aerosol particles can be defined as coordinate points. Curve fitting is then performed to establish a curve showing the correspondence between the concentration of aerosol particles and the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal. This preset mapping relationship can be understood as meaning that for all units of aerosol particle concentration, there is a corresponding ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal. Thus, using limited calibration data, the preset mapping relationship corresponding to various concentrations of aerosol particles can be obtained, effectively simplifying the calibration process. Furthermore, the incident light intensity of each second incident light signal can be defined as the same. In this case, the preset mapping relationship can be understood as a one-to-one correspondence curve between each concentration of aerosol particles and the corresponding transmitted light intensity of the second transmitted light signal. Afterwards, the fitted curve can be verified and calibrated to ensure its accuracy and reliability in practical applications.

[0072] S230, control a first incident light signal to be incident into the gas chamber where the aerosol particles of the concentration to be measured are located, and collect the first transmitted light signal that passes through the aerosol particles of the concentration to be measured.

[0073] It should also be noted that S210 and S220 are steps for calibrating the preset mapping relationship between incident light intensity, transmitted light intensity and aerosol particle concentration based on aerosol particles of known concentration. S230 is a step for obtaining the incident light intensity and transmitted light intensity corresponding to the aerosol particles of the concentration to be measured. The execution order of S210, S220 and S230 in this embodiment is only an example and is not limited. For example, S210 and S220 can be executed first and then S230 can be executed, or S230 can be executed first and then S210 and S220 can be executed, or S210, S220 and S230 can be executed simultaneously.

[0074] S240. Based on the incident light intensity of the first incident light signal and the transmitted light intensity of the first transmitted light signal, as well as the preset mapping relationship between the incident light intensity, the transmitted light intensity and the aerosol particle concentration, determine the concentration of the aerosol particles to be measured.

[0075] The calculation formula C=-[lg(I1 / I0)] / k can be understood as a preset mapping relationship between incident light intensity, transmitted light intensity, and aerosol particle concentration. It includes a one-to-one correspondence between the aerosol particle concentration and the base-10 logarithmic value of the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal. Based on this, this embodiment further illustrates the process of determining the concentration of aerosol particles to be measured using this preset mapping relationship. Optionally, the concentration of aerosol particles to be measured is determined according to the incident light intensity of the first incident light signal, the transmitted light intensity of the first transmitted light signal, and the preset mapping relationship between incident light intensity, transmitted light intensity, and aerosol particle concentration, including: determining the concentration D of aerosol particles to be measured according to the calculation formula D=-[lg(I3 / I2)] / k; where I2 represents the incident light intensity of the first incident light signal, and I3 represents the transmitted light intensity of the first transmitted light signal.

[0076] Specifically, after determining the preset mapping relationship between incident light intensity, transmitted light intensity and aerosol particle concentration, the known incident light intensity I2 of the first incident light signal and the transmitted light intensity I3 of the first transmitted light signal can be substituted into the calculation formula D=-[lg(I3 / I2)] / k. At this time, the value of the linear mapping coefficient k has been determined in the calibration process and can be understood as a known value. In this way, the concentration D of the aerosol particles to be measured can be calculated.

[0077] This invention also provides a method for measuring aerosol particle concentration, such as... Figure 2 and Figure 4As shown, the measurement system can first be used to calibrate multiple known aerosol particles of different concentrations. After determining the preset mapping relationship, the concentration of the aerosol particles of the desired concentration can then be measured. The calibration process involves controlling the light source 1 to emit a second incident light signal towards the gas chamber 3 containing aerosol particles of different concentrations, and controlling the photodetector 2 to collect the corresponding second transmitted light signal transmitted through each known concentration of aerosol particles, performing photoelectric signal conversion. Afterwards, the data on the concentrations of multiple known aerosol particles, the incident light intensity of the corresponding second incident light signal, and the transmitted light intensity of the corresponding second transmitted light signal can be analyzed to determine the preset mapping relationship between the incident light intensity, transmitted light intensity, and aerosol particle concentration. The measurement process involves controlling the light source 1 to emit a first incident light signal towards the gas chamber 3 containing the aerosol particles of the desired concentration, and controlling the photodetector 2 to collect the corresponding first transmitted light signal transmitted through the aerosol particles of the desired concentration, performing photoelectric signal conversion. Subsequently, the known incident light intensity of the first incident light signal and the transmitted light intensity of the acquired first transmitted light signal are transmitted to the host computer program. After receiving the incident light intensity of the first incident light signal and the transmitted light intensity of the first transmitted light signal, the host computer program can determine the concentration of the aerosol particles to be measured based on the preset mapping relationship between the calibrated incident light intensity, transmitted light intensity and aerosol particle concentration.

[0078] This invention also provides an aerosol particle concentration measuring device, which is applicable to measuring the concentration of any type of aerosol particles. This aerosol particle concentration measuring device can be implemented in hardware and / or software and is generally configured in a control board. Figure 5 As shown, the measuring device includes:

[0079] The signal acquisition module 310 is used to control a first incident light signal to be incident on the gas cavity where the aerosol particles of the concentration to be measured are located, and to acquire the first transmitted light signal that passes through the aerosol particles of the concentration to be measured; the concentration measurement module 320 is used to determine the concentration of the aerosol particles of the concentration to be measured based on the incident light intensity of the first incident light signal and the transmitted light intensity of the first transmitted light signal, as well as the preset mapping relationship between the incident light intensity, the transmitted light intensity and the concentration of the aerosol particles.

[0080] The technical solution in this embodiment of the invention involves a measurement method that first controls a first incident light signal to be incident into the gas chamber containing the aerosol particles of the concentration to be measured, and then collects the first transmitted light signal transmitted through the aerosol particles. Based on the incident light intensity of the first incident light signal, the transmitted light intensity of the first transmitted light signal, and a preset mapping relationship between the incident light intensity, the transmitted light intensity, and the aerosol particle concentration, the concentration of the aerosol particles is determined. Using this method, the aerosol particle concentration is calibrated and calculated based on the light transmission method. By analyzing and comparing the incident light intensity of the first incident light signal and the transmitted light intensity of the first transmitted light signal with the preset mapping relationship, the concentration of the aerosol particles is determined. This achieves high-precision and real-time measurement of aerosol particle concentration, simplifies the measurement steps and operations, and is applicable to multiple fields such as environmental monitoring and industrial emission monitoring, demonstrating broad application prospects and significant practical value.

[0081] Based on the above technical solution, optionally, the measuring device further includes a signal acquisition module and a mapping relationship calibration module. The signal acquisition module is used to control multiple second incident light signals to be incident on the gas chambers where the corresponding aerosol particles of known concentration are located, and to collect the second transmitted light signals that pass through each aerosol particle of known concentration; wherein, the concentrations of the aerosol particles of each known concentration are different; the mapping relationship calibration module is used to calibrate and form a preset mapping relationship between the incident light intensity, the transmitted light intensity and the aerosol particle concentration based on the incident light intensity of the second incident light signal and the transmitted light intensity of the second transmitted light signal.

[0082] Optionally, the mapping relationship calibration module may specifically include a first mapping relationship determination unit, which is used to determine a preset mapping relationship between incident light intensity, transmitted light intensity and aerosol particle concentration based on the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal.

[0083] Optionally, the mapping relationship calibration module may specifically include a second mapping relationship determination unit, which is used to determine a preset mapping relationship between incident light intensity, transmitted light intensity and aerosol particle concentration based on the logarithm of the first ratio to base 10; wherein, the first ratio is the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal.

[0084] Optionally, the second mapping relationship determination unit may specifically include a second mapping relationship determination subunit, which is used to determine the preset mapping relationship between incident light intensity, transmitted light intensity and aerosol particle concentration according to the calculation formula C=-[lg(I1 / I0)] / k; where C represents the concentration of aerosol particles of known concentration, I0 represents the incident light intensity of the second incident light signal, I1 represents the transmitted light intensity of the second transmitted light signal, and k represents the linear mapping coefficient.

[0085] Optionally, the concentration measurement module 320 may specifically include a concentration measurement unit, which is used to determine the concentration D of the aerosol particles to be measured according to the calculation formula D=-[lg(I3 / I2)] / k; where I2 represents the incident light intensity of the first incident light signal and I3 represents the transmitted light intensity of the first transmitted light signal.

[0086] Optionally, the mapping relationship calibration module may specifically include a third mapping relationship determination unit, which is used to define the correspondence between each first ratio and the concentration of the corresponding known concentration of aerosol particles as coordinate points, and to perform curve fitting to obtain a preset mapping relationship between incident light intensity, transmitted light intensity and aerosol particle concentration; wherein, the first ratio is the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal.

[0087] The aerosol particle concentration measuring device provided in the embodiments of the present invention can execute the aerosol particle concentration measuring method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of executing the method.

[0088] Figure 6 This is a schematic diagram of the structure of a terminal device provided in an embodiment of the present invention. The terminal device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The terminal device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0089] like Figure 6As shown, the terminal device 100 includes one or more processors 110 and a storage device communicatively connected to the processors 110. The storage device may be a read-only memory (ROM) 120, a random access memory (RAM) 130, etc. The storage device stores computer programs executable by one or more processors. The processors 110 can perform various appropriate actions and processes based on the computer programs stored in the ROM 120 or loaded from storage unit 180 into the RAM 130. The RAM 130 may also store various programs and data required for the operation of the terminal device 100. The processors 110, ROM 120, and RAM 130 are interconnected via a bus 140. An input / output (I / O) interface 150 is also connected to the bus 140.

[0090] Multiple components in terminal device 100 are connected to I / O interface 150, including: input unit 160, such as keyboard, mouse, etc.; output unit 170, such as various types of displays, speakers, etc.; storage unit 180, such as disk, optical disk, etc.; and communication unit 190, such as network card, modem, wireless transceiver, etc. Communication unit 190 allows terminal device 100 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0091] Processor 110 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 110 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 110 performs the various methods and processes described above, such as methods for measuring aerosol particle concentration.

[0092] In some embodiments, the method for measuring aerosol particle concentration may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 180. In some embodiments, part or all of the computer program may be loaded and / or installed on terminal device 100 via ROM 120 and / or communication unit 190. When the computer program is loaded into RAM 130 and executed by processor 110, one or more steps of the method for measuring aerosol particle concentration described above may be performed. Alternatively, in other embodiments, processor 110 may be configured to perform the method for measuring aerosol particle concentration by any other suitable means (e.g., by means of firmware).

[0093] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0094] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0095] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0096] To provide interaction with a user, the systems and techniques described herein can be implemented on a terminal device having: a display device for displaying information to the user (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor); and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the terminal device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0097] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0098] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0099] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0100] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method of measuring the concentration of aerosol particles, characterized by, The method comprises the following steps: controlling a first incident light signal to be incident on a gas cavity in which aerosol particles with a to-be-measured concentration are located, and collecting a first transmitted light signal transmitted through the aerosol particles with the to-be-measured concentration; determining the concentration of the aerosol particles with the to-be-measured concentration according to the incident light intensity of the first incident light signal, the transmitted light intensity of the first transmitted light signal, and a preset mapping relationship between the incident light intensity, the transmitted light intensity, and the concentration of the aerosol particles; before determining the concentration of the aerosol particles with the to-be-measured concentration according to the incident light intensity of the first incident light signal, the transmitted light intensity of the first transmitted light signal, and the preset mapping relationship between the incident light intensity, the transmitted light intensity, and the concentration of the aerosol particles, the method further comprises the following steps: controlling a plurality of second incident light signals to be incident on a plurality of gas cavities in which aerosol particles with known concentrations are located respectively, and collecting a plurality of second transmitted light signals transmitted through the aerosol particles with the known concentrations respectively; wherein the concentrations of the aerosol particles with the known concentrations are different from each other; calibrating the preset mapping relationship between the incident light intensity, the transmitted light intensity, and the concentration of the aerosol particles according to the incident light intensity of the second incident light signal and the transmitted light intensity of the second transmitted light signal; the step of calibrating the preset mapping relationship between the incident light intensity, the transmitted light intensity, and the concentration of the aerosol particles according to the incident light intensity of the second incident light signal and the transmitted light intensity of the second transmitted light signal comprises the following steps: determining the preset mapping relationship between the incident light intensity, the transmitted light intensity, and the concentration of the aerosol particles according to the logarithm value with a base of 10 of the first ratio; wherein the first ratio is a ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal; the step of determining the preset mapping relationship between the incident light intensity, the transmitted light intensity, and the concentration of the aerosol particles according to the logarithm value with a base of 10 of the first ratio comprises the following steps: determining the preset mapping relationship between the incident light intensity, the transmitted light intensity, and the concentration of the aerosol particles according to a calculation formula C=-[lg(I1 / I0)] / k; wherein C represents the concentration of the aerosol particles with the known concentration, I0 represents the incident light intensity of the second incident light signal, I1 represents the transmitted light intensity of the second transmitted light signal, and k represents a linear mapping coefficient.

2. The measurement method according to claim 1, characterized in that, the step of determining the concentration of the aerosol particles with the to-be-measured concentration according to the incident light intensity of the first incident light signal, the transmitted light intensity of the first transmitted light signal, and the preset mapping relationship between the incident light intensity, the transmitted light intensity, and the concentration of the aerosol particles comprises the following steps: determining the concentration D of the aerosol particles with the to-be-measured concentration according to a calculation formula D=-[lg(I3 / I2)] / k; wherein I2 represents the incident light intensity of the first incident light signal, and I3 represents the transmitted light intensity of the first transmitted light signal.

3. The measurement method according to claim 1, characterized in that, the step of calibrating the preset mapping relationship between the incident light intensity, the transmitted light intensity, and the concentration of the aerosol particles according to the incident light intensity of the second incident light signal and the transmitted light intensity of the second transmitted light signal comprises the following steps: The first ratio is defined as a coordinate point in relation to the concentration of the aerosol particles of the known concentration, and curve fitting is performed to obtain a preset mapping relationship between the incident light intensity, the transmitted light intensity and the concentration of the aerosol particles; wherein the first ratio is the ratio of the transmitted light intensity of the second transmitted light signal to the incident light intensity of the second incident light signal.

4. An aerosol particle concentration measuring device, characterized by, The measurement device is used to perform the aerosol particle concentration measurement method as claimed in any one of claims 1-3. The signal acquisition module is configured to control a first incident light signal to be incident into a gas cavity in which the aerosol particles of the to-be-measured concentration are located, and to acquire a first transmitted light signal transmitted through the aerosol particles of the to-be-measured concentration. The concentration measurement module is configured to determine the concentration of the aerosol particles of the to-be-measured concentration according to the incident light intensity of the first incident light signal, the transmitted light intensity of the first transmitted light signal, and a preset mapping relationship between the incident light intensity, the transmitted light intensity and the concentration of the aerosol particles.

5. A terminal device, characterized by, One or more processors; A storage device configured to store one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the aerosol particle concentration measurement method as claimed in any one of claims 1-3. The program is executed by the processor to implement the aerosol particle concentration measurement method as claimed in any one of claims 1-3.

6. A computer-readable storage medium having stored thereon a computer program, characterized in that, ​

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