Method, device and system for measuring fuel spray aerosol based on total light scattering

Abstract

The application discloses a kind of based on full light scattering fuel spray aerosol measurement method, device and system, belong to internal combustion engine laser detection field, the measurement method includes: control light source generates preset light beam and is irradiated the distribution area where oil fog aerosol particle is located, the light path area that the preset light beam passes through the distribution area is evenly divided into multiple lattices;Utilize multiple distribution in the measurement region outside photoelectric sensor receives scattering light intensity;The scattering light intensity is brought into the preset equation that characterizes the relationship between scattering characteristic and aerosol particle distribution and is solved, obtains the distribution parameter of oil fog aerosol particle in each lattice.The application can extract the distribution parameter of oil fog aerosol particle from the scattering characteristic of accurately captured oil fog aerosol, realizes the real-time monitoring of concentration and particle size distribution;The method has the advantages of strong real-time, wide measurement range and high accuracy.

Description

Technical Field

[0001] This invention belongs to the field of laser detection of internal combustion engines, and more specifically, relates to a method, device and system for measuring fuel spray aerosols based on full-path scattering. Background Technology

[0002] In internal combustion engines, the fuel injection system atomizes liquid fuel into tiny fuel mist aerosol particles, making fuel injection atomization a core component of the combustion process. The atomized fuel mist aerosol rapidly evaporates within the cylinder and mixes thoroughly with air, ensuring complete and efficient combustion. The quality of fuel injection atomization directly affects combustion efficiency, engine power, fuel consumption, and the generation of harmful emissions (such as NOx, CO, and unburned hydrocarbons). Furthermore, good atomization can improve engine response and stability. Therefore, accurately measuring the real-time concentration and particle size distribution of fuel injection atomization is crucial for optimizing injector design, suppressing soot generation, and meeting China VI / Euro VII emission regulations.

[0003] Currently, the main methods for measuring and analyzing the concentration and particle size distribution of oil mist aerosols include high-speed microscopy, laser diffraction, and optical scattering. High-speed microscopy uses a high-speed CCD camera to capture transient images of the spray field and extracts the droplet size distribution through image processing. While this method can directly obtain spatial distribution characteristics, it is limited by the optical diffraction limit, making it difficult to accurately measure aerosol particles smaller than 5 μm. When measuring aerosol particles smaller than 2 μm, the edge detection error can reach ±30%. Laser diffraction utilizes the Fraunhofer diffraction principle to invert the aerosol particle size distribution, suitable for online measurement in the 10-2000 μm particle size range. However, this method is based on the Fraunhofer approximation theory and ignores the phase information of Mie scattering; when the particle size is smaller than 10 μm, the inversion error increases exponentially. The measurement optical path of laser diffraction requires a fixed optical path, which cannot adapt to the spatial diffusion characteristics of the fuel injection atomization process, resulting in severe signal attenuation in the edge region and poor accuracy. In summary, existing technologies cannot accurately monitor the distribution of oil mist aerosols in real time. Summary of the Invention

[0004] In view of the above-mentioned defects or improvement needs of the prior art, the present invention provides a method, device and system for measuring fuel spray aerosol based on full optical path scattering. Its purpose is to achieve accurate real-time monitoring of concentration and particle size distribution by accurately capturing the scattering characteristics of oil mist aerosol, and solve the technical problem that the prior art cannot accurately monitor the distribution of oil mist aerosol in real time.

[0005] To achieve the above objectives, according to one aspect of the present invention, a method for measuring fuel spray aerosols based on full-path scattering is provided, comprising:

[0006] S1: Control the light source to generate a preset light beam to irradiate the distribution area where the oil mist aerosol particles are located, and divide the optical path area traversed by the preset light beam through the distribution area into equal parts. k Each grid;

[0007] S2: Utilize n A photoelectric sensor distributed outside the measurement area receives the scattered light intensity. I PD1 , I PD2 ,..., I PDn ], I PDi For the first i The intensity of scattered light received by each photoelectric sensor i ={1,..., n}; the intensity of the scattered light [ I PD1 , I PD2 ,..., I PDn Substitute into the preset equation:

[0008] ;

[0009] The solution is performed to obtain the distribution parameters of the oil mist aerosol particles in each of the aforementioned grids. These distribution parameters include: the first... j Aerosol concentration within each cell C Nj and particle size distribution function , j ={1,..., k};

[0010] in, d The particle size of the aerosol particles is [value missing]. d min The minimum particle size of aerosol particles. d max This represents the maximum particle size of the aerosol particles. I 0 ( d , θ ij Let be the intensity of single-particle scattered light from the aerosol in the j-th lattice at the i-th photoelectric sensor. μ j For the first j The median particle size distribution in each grid cell, σ j For the first j The standard deviation of the particle size distribution in each grid cell; ωj For the first j The light transmittance of each grid cell.

[0011] Furthermore, the preset beam is a single-wavelength beam, and the optical path region is evenly divided. k A grid with different light transmittance; S2 includes:

[0012] When using n =4 k When one of the photoelectric sensors receives the scattered light intensity, the scattered light intensity is substituted into the preset equation for solution, to obtain the accurate solution of the distribution parameters of oil mist aerosol particles in each of the grids, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance ω j ;

[0013] When using n <4 k When one of the photoelectric sensors receives the scattered light intensity, an optimization algorithm is used to solve the preset equation to obtain the optimal solution for the distribution parameters of oil mist aerosol particles in each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance ω j .

[0014] Furthermore, the preset beam is m The optical path region is divided into sections with light beams of different wavelengths emitted in subsequent transmissions. k A grid with different light transmittance; S2 includes:

[0015] When using n = (4) k -1) / m When the photoelectric sensor receives the scattered light intensity, it substitutes the scattered light intensity into the preset equation to solve for the accurate solution of the distribution parameters of oil mist aerosol particles in each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance ω j ;

[0016] When using n < (4) k -1) / mWhen the photoelectric sensor receives the scattered light intensity, it substitutes the scattered light intensity into the preset equation and uses an optimization algorithm to solve it, obtaining the optimal solution for the distribution parameters of oil mist aerosol particles in each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance ω j .

[0017] Furthermore, the preset beam is a single-wavelength beam, and the optical path region is averaged as follows: k The light transmittance coefficients are the same and are known to be . α The grid; S2 includes:

[0018] When using n =3 k When the photoelectric sensor receives the scattered light intensity, it substitutes the scattered light intensity and the transmittance coefficient α into the preset equation to solve for the accurate solution of the distribution parameters of oil mist aerosol particles in each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C Nj and particle size distribution function ;

[0019] When using n <3 k When the photoelectric sensor receives the scattered light intensity, it combines the scattered light intensity with the transmittance. Substitute α The preset equations are solved using an optimization algorithm to obtain optimized solutions for the distribution parameters of oil mist aerosol particles within each grid, including: k aerosol concentration within each of the aforementioned grids C Nj and particle size distribution function .

[0020] Furthermore, the preset beam is m The optical path region is divided into two average segments, each emitted with a different wavelength. k Each has the same transmittance coefficient and is known to be [value missing]. α The grid; S2 includes:

[0021] When using n =3 k / m When the photoelectric sensor receives the scattered light intensity, it combines the scattered light intensity with the transmittance. Substitute α Solving the preset equation yields accurate solutions for the distribution parameters of oil mist aerosol particles within each of the grid cells, including: kaerosol concentration within each of the aforementioned grids C Nj and particle size distribution function ;

[0022] When using n <3 k / m When the photoelectric sensor receives the scattered light intensity, it combines the scattered light intensity with the transmittance. Substitute α The preset equations are solved using an optimization algorithm to obtain optimized solutions for the distribution parameters of oil mist aerosol particles within each grid, including: k aerosol concentration within each of the aforementioned grids C Nj and particle size distribution function .

[0023] Furthermore, the preset beam is m The optical path region is divided into two average segments, each emitted with a different wavelength. k A grid with the same light transmittance; S2 includes:

[0024] When using n =(3) k When the photoelectric sensors receive the scattered light intensity (+1) / m, the scattered light intensity is substituted into the preset equation for solution, to obtain the accurate solution of the distribution parameters of oil mist aerosol particles in each of the grids, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance;

[0025] When using n <(3) k +1) / m When the photoelectric sensor receives the scattered light intensity, it substitutes the scattered light intensity into the preset equation and uses an optimization algorithm to solve it, obtaining the optimal solution for the distribution parameters of oil mist aerosol particles in each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance.

[0026] According to another aspect of the present invention, a fuel spray aerosol measuring device based on full-path optical scattering is provided, comprising:

[0027] The irradiation module controls the light source to generate a preset light beam to irradiate the distribution area of ​​the oil mist aerosol particles, and divides the optical path region traversed by the preset light beam through the distribution area into equal parts. k Each grid;

[0028] The receiving module is used to utilize n A photoelectric sensor distributed outside the measurement area receives the scattered light intensity. I PD1 , I PD2 ,..., I PDn ], I PDi For the first i The intensity of scattered light received by each photoelectric sensor i ={1,..., n}; the intensity of the scattered light [ I PD1 , I PD2 ,..., I PDn Substitute into the preset equation:

[0029] ;

[0030] The solution is performed to obtain the distribution parameters of the oil mist aerosol particles in each of the aforementioned grids. These distribution parameters include: the first... j Aerosol concentration within each cell C Nj and particle size distribution function , j ={1,..., k};

[0031] in, d The particle size of the aerosol particles is [value missing]. d min The minimum particle size of aerosol particles. d max This represents the maximum particle size of the aerosol particles. I 0 ( d , θ ij Let be the intensity of single-particle scattered light from the aerosol in the j-th lattice at the i-th photoelectric sensor. μ j For the first j The median particle size distribution in each grid cell, σ j For the first j The standard deviation of the particle size distribution in each grid cell; ω j For the first j The light transmittance of each grid cell.

[0032] According to another aspect of the present invention, a fuel spray aerosol measurement system based on full optical path scattering is provided, comprising: a light source, n photoelectric sensors, a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the steps of the measurement method.

[0033] According to another aspect of the invention, a computer-readable storage medium is provided having a computer program stored thereon, the computer program being executed by a processor as steps of the measurement method.

[0034] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0035] (1) This invention provides a method for measuring fuel spray aerosols based on full-path scattering. The method involves controlling a light source to generate a preset light beam that illuminates the distribution area of ​​the fuel spray aerosol particles. The optical path of the preset light beam through the distribution area is divided into multiple grids. Multiple photoelectric sensors distributed outside the measurement area receive the scattered light intensity. The scattered light intensity is then substituted into a preset equation characterizing the relationship between the scattered light intensity and the aerosol particle distribution parameters to obtain the distribution parameters of the fuel spray aerosol particles in each grid. This invention can extract the distribution parameters of fuel spray aerosol particles from the precisely captured scattering characteristics of fuel spray aerosols, enabling real-time monitoring of aerosol particle concentration and size distribution. This method has advantages such as high real-time performance, wide measurement range, and high accuracy. Attached Figure Description

[0036] Figure 1 This is a flowchart of the fuel spray aerosol measurement method provided in Embodiment 1 of the present invention.

[0037] Figure 2 This is an environmental schematic diagram of a fuel spray aerosol measurement method provided in Embodiment 1 of the present invention.

[0038] Figure 3 This is another environmental schematic diagram of the fuel spray aerosol measurement method provided in Embodiment 1 of the present invention. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Example 1

[0041] This embodiment provides a method for measuring fuel spray aerosols based on full-path optical scattering, such as... Figure 1 As shown, it includes: S1: Controlling the light source to generate a preset light beam to irradiate the distribution area where the oil mist aerosol particles are located, and dividing the optical path region through which the preset light beam passes through the distribution area into equal parts. k One grid; S2: Utilize n A photoelectric sensor distributed outside the measurement area receives the scattered light intensity. I PD1 , I PD2 ,..., I PDn ], I PDi For the first i The intensity of scattered light received by each photoelectric sensor i ={1,..., n}; the intensity of the scattered light [ I PD1 , I PD2 ,..., I PDn Substitute into the preset equation:

[0042] ;

[0043] The solution is performed to obtain the distribution parameters of the oil mist aerosol particles in each of the aforementioned grids. These distribution parameters include: the first... j Aerosol concentration within each cell C Nj and particle size distribution function , j ={1,..., k};in, d The particle size of the aerosol particles is [value missing]. d min The minimum particle size of aerosol particles. d max This represents the maximum particle size of the aerosol particles. I 0 ( d , θ ij Let be the intensity of single-particle scattered light from the aerosol in the j-th lattice at the i-th photoelectric sensor. μ j For the first j The median particle size distribution in each grid cell, σ j For the first j The standard deviation of the particle size distribution in each grid cell; ω j For the first jThe light transmittance of each grid cell.

[0044] Furthermore, the preset beam is a single-wavelength beam, and the optical path region is evenly divided. k A grid with different light transmittance; S2 includes: when using n =4 k When one of the photoelectric sensors receives the scattered light intensity, the scattered light intensity is substituted into the preset equation for solution, to obtain the accurate solution of the distribution parameters of oil mist aerosol particles in each of the grids, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance ω j When using n <4 k When one of the photoelectric sensors receives the scattered light intensity, an optimization algorithm is used to solve the preset equation to obtain the optimal solution for the distribution parameters of oil mist aerosol particles in each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance ω j .

[0045] Furthermore, the preset beam is m The optical path region is divided into sections with light beams of different wavelengths emitted in subsequent transmissions. k A grid with different light transmittance; S2 includes: when using n = (4) k -1) / m When the photoelectric sensor receives the scattered light intensity, it substitutes the scattered light intensity into the preset equation for solution, obtaining an accurate solution for the distribution parameters of oil mist aerosol particles in each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance ω j When using n < (4) k -1) / m When the photoelectric sensor receives the scattered light intensity, it substitutes the scattered light intensity into the preset equation and uses an optimization algorithm to solve it, obtaining the optimal solution for the distribution parameters of oil mist aerosol particles in each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C NjParticle size distribution function and transmittance ω j .

[0046] Furthermore, the preset beam is a single-wavelength beam, and the optical path region is averaged as follows: k The light transmittance coefficients are the same and are known to be . α The grid; S2 includes: when using n =3 k When the photoelectric sensor receives the scattered light intensity, it substitutes the scattered light intensity and the transmittance coefficient α into the preset equation to solve for an accurate solution of the distribution parameters of the oil mist aerosol particles in each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C Nj and particle size distribution function When using n <3 k When the photoelectric sensor receives the scattered light intensity, it combines the scattered light intensity with the transmittance. Substitute α The preset equations are solved using an optimization algorithm to obtain optimized solutions for the distribution parameters of oil mist aerosol particles within each grid, including: k aerosol concentration within each of the aforementioned grids C Nj and particle size distribution function .

[0047] Furthermore, the preset beam is m The optical path region is divided into two average segments, each emitted with a different wavelength. k Each has the same transmittance coefficient and is known to be [value missing]. α The grid; S2 includes: when using n =3 k / m When the photoelectric sensor receives the scattered light intensity, it combines the scattered light intensity with the transmittance. Substitute α Solving the preset equation yields accurate solutions for the distribution parameters of oil mist aerosol particles within each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C Nj and particle size distribution function When using n <3 k / m When the photoelectric sensor receives the scattered light intensity, it combines the scattered light intensity with the transmittance. Substitute α The preset equations are solved using an optimization algorithm to obtain optimized solutions for the distribution parameters of oil mist aerosol particles within each grid, including: kaerosol concentration within each of the aforementioned grids C Nj and particle size distribution function .

[0048] Furthermore, the preset beam is m The optical path region is divided into two average segments, each emitted with a different wavelength. k A grid with the same light transmittance; S2 includes: when using n =(3) k When the photoelectric sensors receive the scattered light intensity (+1) / m, the scattered light intensity is substituted into the preset equation for solution, to obtain the accurate solution of the distribution parameters of oil mist aerosol particles in each of the grids, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance. When using n <(3) k +1) / m When the photoelectric sensor receives the scattered light intensity, it substitutes the scattered light intensity into the preset equation and uses an optimization algorithm to solve it, obtaining the optimal solution for the distribution parameters of oil mist aerosol particles in each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance.

[0049] The following describes a method for measuring fuel spray aerosols using a practical parameter as an example.

[0050] like Figure 2 The diagram shows a schematic of aerosol concentration and particle size distribution measurements. The entire optical path is divided into 6 grids, and the upper and lower limits of the particle size distribution function are shown. d max and d min Using 1000 nm and 10 nm as the reference wavelengths, and a single-wavelength laser as the light source, the particle size distribution function is... This can be described using a log-normal distribution model:

[0051] .

[0052] To measure the concentration and particle size distribution across six grid cells throughout the entire optical path, 23 photoelectric sensors were deployed outside the measurement area. Based on the scattered light intensity measured by the photoelectric sensors, the following equation can be derived:

[0053] ;

[0054] inn Take 23, k Take 6.

[0055] By solving the above equations C N , μ and σ The aerosol concentration and particle size distribution across the entire optical path measurement area can then be obtained. Preferably, within the allowable range of measurement accuracy, the transmittance can be considered... ω j =1, then the number of unknown measurands in the equation is reduced from 23 to 18. The reduction of unknown measurands simplifies the solution of the equation and also reduces the number of photoelectric sensors to 18.

[0056] Preferably, the light source can emit light beams of multiple wavelengths. If the light source can emit three different wavelengths, the number of photoelectric sensors can be reduced to eight. When the transmittance... ω j When the value is 1, the number of photoelectric sensors can be reduced to 6.

[0057] Preferably, when the number of photoelectric sensors is small and the equation cannot be solved directly, optimization algorithms such as artificial bee colony algorithm (ABC), particle swarm optimization algorithm (PSO), and genetic algorithm (GA) can be used to solve the unknown measurand in the equation, and regularization methods can be used to limit the conditions and eliminate abnormal solutions.

[0058] like Figure 3 The diagram illustrates another method for measuring aerosol concentration and particle size distribution. Concentration and particle size distribution can be measured in any grid cell within the entire optical path measurement area. The photoelectric sensor can be placed anywhere, and the angle at which the scattered light intensity is received can be a spatial angle.

[0059] Example 2

[0060] This embodiment provides a fuel spray aerosol measurement device based on full-path scattering, including an irradiation module and a receiving module. The irradiation module controls a light source to generate a preset light beam to irradiate the distribution area of ​​the fuel mist aerosol particles, and divides the optical path region traversed by the preset light beam through the distribution area into equal parts. k Each cell. The receiving module is used to utilize... n A photoelectric sensor distributed outside the measurement area receives the scattered light intensity. I PD1 , I PD2 ,..., I PDn ], I PDi For the first i The intensity of scattered light received by each photoelectric sensori ={1,..., n}; the intensity of the scattered light [ I PD1 , I PD2 ,..., I PDn Substitute into the preset equation:

[0061] ;

[0062] The solution is performed to obtain the distribution parameters of the oil mist aerosol particles in each of the aforementioned grids. These distribution parameters include: the first... j Aerosol concentration within each cell C Nj and particle size distribution function , j ={1,..., k};in, d The particle size of the aerosol particles is [value missing]. d min The minimum particle size of aerosol particles. d max This represents the maximum particle size of the aerosol particles. I 0 ( d , θ ij Let be the intensity of single-particle scattered light from the aerosol in the j-th lattice at the i-th photoelectric sensor. μ j For the first j The median particle size distribution in each grid cell, σ j For the first j The standard deviation of the particle size distribution in each grid cell; ω j For the first j The light transmittance of each grid cell.

[0063] Example 3

[0064] This embodiment provides a fuel spray aerosol measurement system based on full optical path scattering, including: a light source, n photoelectric sensors, a memory, and a processor. The memory stores a computer program, and the processor executes the steps of the measurement method when executing the computer program.

[0065] Example 4

[0066] This embodiment provides a computer-readable storage medium storing a computer program thereon, wherein the computer program, when executed by a processor, contains the steps of the measurement method.

[0067] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for measuring fuel spray aerosols based on full-path optical scattering, characterized in that, include: S1: Control the light source to generate a preset light beam to irradiate the distribution area where the oil mist aerosol particles are located, and divide the optical path area traversed by the preset light beam through the distribution area into equal parts. k Each grid; S2: Utilize n A photoelectric sensor distributed outside the measurement area receives the intensity of scattered light. I PD1 , I PD2 ,..., I PDn ], I PDi For the first i The intensity of scattered light received by each photoelectric sensor i ={1,..., n }; the intensity of the scattered light [ I PD1 , I PD2 ,..., I PDn Substitute into the preset equation: ； The solution is performed to obtain the distribution parameters of the oil mist aerosol particles in each of the aforementioned grids. These distribution parameters include: the first... j Aerosol concentration within each cell C Nj and particle size distribution function , j ={1,..., k }; in, d The particle size of the aerosol particles is [value missing]. d min The minimum particle size of aerosol particles. d max This represents the maximum particle size of the aerosol particles. I 0 ( d , θ ij Let be the intensity of single-particle scattered light from the aerosol in the j-th lattice at the i-th photoelectric sensor. μ j For the first j The median particle size distribution in each grid cell, σ j For the first j The standard deviation of the particle size distribution in each grid cell; ω j For the first j The light transmittance of each grid cell.

2. The method for measuring fuel spray aerosol as described in claim 1, characterized in that, The preset beam is a single-wavelength beam, and the optical path region is divided into evenly... k A grid with different light transmittance; S2 includes: When using n = (4) k -1) When the photoelectric sensor receives the scattered light intensity, it substitutes the scattered light intensity into the preset equation to solve for the accurate solution of the distribution parameters of oil mist aerosol particles in each of the grids, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance ω j ; When using n <4 k When one of the photoelectric sensors receives the scattered light intensity, an optimization algorithm is used to solve the preset equation to obtain an optimal solution for the distribution parameters of oil mist aerosol particles in each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance ω j .

3. The method for measuring fuel spray aerosol as described in claim 1, characterized in that, The preset beam is m The optical path region is divided into sections with light beams of different wavelengths emitted in subsequent transmissions. k A grid with different light transmittance; S2 includes: When using n = (4) k -1) / m When the photoelectric sensor receives the scattered light intensity, it substitutes the scattered light intensity into the preset equation to solve for the accurate solution of the distribution parameters of oil mist aerosol particles in each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance ω j ; When using n < (4) k -1) / m When the photoelectric sensor receives the scattered light intensity, it substitutes the scattered light intensity into the preset equation and uses an optimization algorithm to solve it, obtaining the optimal solution for the distribution parameters of oil mist aerosol particles in each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance ω j .

4. The method for measuring fuel spray aerosol as described in claim 1, characterized in that, The preset beam is a single-wavelength beam, and the optical path region is divided into average sections. k The light transmittance coefficients are the same and are known to be . α The grid; S2 includes: When using n =3 k When the photoelectric sensor receives the scattered light intensity, it substitutes the scattered light intensity and the transmittance coefficient α into the preset equation to solve for the accurate solution of the distribution parameters of oil mist aerosol particles in each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C Nj and particle size distribution function ; When using n <3 k When the photoelectric sensor receives the scattered light intensity, it combines the scattered light intensity with the transmittance. alpha generation enter The preset equations are solved using an optimization algorithm to obtain optimized solutions for the distribution parameters of oil mist aerosol particles within each grid, including: k aerosol concentration within each of the aforementioned grids C Nj and particle size distribution function .

5. The method for measuring fuel spray aerosol as described in claim 1, characterized in that, The preset beam is m The optical path region is divided into two average segments, each emitted with a different wavelength. k Each has the same transmittance coefficient and is known to be [value missing]. α The grid; S2 includes: When using n =3 k / m When the photoelectric sensor receives the scattered light intensity, it combines the scattered light intensity with the transmittance. α Substitution Solving the preset equation yields accurate solutions for the distribution parameters of oil mist aerosol particles within each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C Nj and particle size distribution function ; When using n <3 k / m When the photoelectric sensor receives the scattered light intensity, it combines the scattered light intensity with the transmittance. α Substitution The preset equations are solved using an optimization algorithm to obtain optimized solutions for the distribution parameters of oil mist aerosol particles within each grid, including: k aerosol concentration within each of the aforementioned grids C Nj and particle size distribution function .

6. The method for measuring fuel spray aerosol as described in claim 1, characterized in that, The preset beam is m The optical path region is divided into two average segments, each emitted with a different wavelength. k A grid with the same light transmittance; S2 includes: When using n =(3 k When the photoelectric sensors receive the scattered light intensity (+1) / m, the scattered light intensity is substituted into the preset equation for solution, to obtain the accurate solution of the distribution parameters of oil mist aerosol particles in each of the grids, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance; When using n <(3) k +1) / m When the photoelectric sensor receives the scattered light intensity, it substitutes the scattered light intensity into the preset equation and uses an optimization algorithm to solve it, obtaining the optimal solution for the distribution parameters of oil mist aerosol particles in each of the grid cells, including: k aerosol concentration within each of the aforementioned grids C Nj Particle size distribution function and transmittance.

7. A fuel spray aerosol measuring device based on full-path optical scattering, characterized in that, include: The irradiation module controls the light source to generate a preset light beam to irradiate the distribution area of ​​the oil mist aerosol particles, and divides the optical path region traversed by the preset light beam through the distribution area into equal parts. k Each grid; The receiving module is used to utilize n A photoelectric sensor distributed outside the measurement area receives the intensity of scattered light. I PD1 , I PD2 ,..., I PDn ], I PDi For the first i The intensity of scattered light received by each photoelectric sensor i ={1,..., n }; the intensity of the scattered light [ I PD1 , I PD2 ,..., I PDn Substitute into the preset equation: ； The solution is performed to obtain the distribution parameters of the oil mist aerosol particles in each of the aforementioned grids. These distribution parameters include: the first... j Aerosol concentration within each cell C Nj and particle size distribution function , j ={1,..., k }; in, d The particle size of the aerosol particles is [value missing]. d min The minimum particle size of aerosol particles. d max This represents the maximum particle size of the aerosol particles. I 0 ( d , θ ij Let be the intensity of single-particle scattered light from the aerosol in the j-th lattice at the i-th photoelectric sensor. μ j For the first j The median particle size distribution in each grid cell, σ j For the first j The standard deviation of the particle size distribution in each grid cell; ω j For the first j The light transmittance of each grid cell.

8. A fuel spray aerosol measurement system based on full-path optical scattering, characterized in that, include: The device comprises a light source, n photoelectric sensors, a memory, and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the measurement method according to any one of claims 1 to 6.

9. 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 according to any one of claims 1 to 6.

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