Device and method for measuring mass flow rate of gas-solid two-phase flow based on scattered light imaging

Abstract

The invention relates to the technical field of two-phase flow mass flow rate measurement, in particular to a gas-solid two-phase flow mass flow rate measurement device and method based on scattered light imaging. The measuring device comprises an orthogonal laser light source module used for outputting two laser beams which are orthogonal to each other and coincide with the cross section and the longitudinal section of a gas-solid two-phase flow field; the different-magnification scattered light capturing module is used for capturing a longitudinal section conventional-resolution image sequence and a longitudinal section high-resolution image sequence of a longitudinal section visual angle illuminated by the laser beam coinciding with the longitudinal section of the gas-solid two-phase flow field; the cross section scattered light capturing module is used for capturing a cross section conventional resolution image sequence of a cross section visual angle illuminated by the laser beam coinciding with the cross section of the gas-solid two-phase flow field; and the image processing module is used for receiving and processing the longitudinal section conventional resolution image sequence, the longitudinal section high resolution image sequence and the cross section conventional resolution image sequence to obtain the solid phase mass flow rate of the gas-solid two-phase flow.

Description

Technical Field

[0001] The invention relates to the technical field of two-phase flow mass flow rate measurement, and in particular to a device and method for measuring the mass flow rate of a gas-solid two-phase flow based on scattered light imaging. Background Art

[0002] The gas-solid two-phase flow transport mode in which solid powder particles are carried by moving airflow is widely used in important industrial scenarios such as power production, automated pharmaceutical processes, metal smelting, and in complex working conditions such as the fuel delivery process of power output devices. Measuring the process parameters of gas-solid two-phase flow (such as mass flow rate, solid phase flow field distribution, etc.) is of great significance for saving production costs, optimizing production processes, and improving production efficiency.

[0003] At present, the main technical solutions for measuring the process parameters of gas-solid two-phase flow (particle flow rate and mass flow rate, etc.) can be divided into acoustic method, electrical method and optical method. The acoustic method uses artificially controlled sound sources to emit sound waves with specific parameters (frequency, sound intensity). When the sound waves pass through the fluid, they will attenuate and other changes. This change characteristic can be associated with the process parameters such as the content of solid particles, particle size, and flow rate in the gas-solid two-phase flow, and then used to measure the mass flow rate. The correlation model developed based on the acoustic method is greatly affected by the measurement conditions, and even some deviations from the working conditions will cause the model to fail; and the measurement model is mostly based on a single particle size distribution assumption, which does not conform to the actual situation of most flow states. The electrical method uses a specific method to collect, process and analyze the characteristic information such as charge intensity and polarity generated by the collision / friction between the moving solid particles and the conveying pipeline and the surrounding scattered particles. With the help of tools such as principal component analysis and machine learning, the mass flow rate of the gas-solid two-phase flow is matched with the above-mentioned electrical-related characteristic information, and then a solid phase mass flow rate measurement model for the gas-solid two-phase flow is established. In practical applications, on the one hand, electrical measurement requires adaptive processing of the transmission pipeline (for example, the measuring pipe section needs to be replaced with insulating material, etc.); on the other hand, this method is affected by environmental conditions (temperature, humidity, etc.), differences in solid phase particle parameters, and other conditions, resulting in poor universality.

[0004] The optical method is developed based on the characteristics of light scattering and attenuation in non-uniform media. According to the measurement principle, it can be divided into transmission method and scattering method. Among them, the transmission method measures the degree of light attenuation caused by the gas-solid two-phase flow through the detector to obtain parameters such as solid content, and further calculates the mass flow rate; the scattering method inverts the concentration parameters of solid particles by capturing the scattered light intensity based on the correlation between the scattered light intensity and the particle size constructed by the calibration test. The measurement advantage of the optical method is that it can obtain the real solid particle information of the gas-solid two-phase flow by capturing the optical signal through image collectors such as CCD cameras, and then can process and obtain solid concentration distribution, solid particle size, content and mass flow rate, etc., but it is limited by the strong reflection characteristics of the optical signal under high particle concentration. The current technical method is only applicable to working conditions with low solid particle content. The above analysis shows that the existing measurement method cannot meet the test requirements of gas-solid two-phase flow with high concentration particle distribution under complex conditions. Summary of the invention

[0005] The object of the present invention is to provide a method to solve the problem that the optical measurement method in the prior art cannot meet the gas-solid two-phase flow test requirements of high-concentration particle distribution under complex conditions.

[0006] In order to solve the above problems, the technical solution of the device for measuring the mass flow rate of gas-solid two-phase flow based on scattered light imaging of the present invention is: A device for measuring the mass flow rate of a gas-solid two-phase flow based on scattered light imaging, an orthogonal laser light source module for outputting two laser beams that are orthogonal to each other and coincide with the cross-section and longitudinal section of the gas-solid two-phase flow field; A different magnification scattered light capture module is used to capture a longitudinal section conventional resolution image sequence and a longitudinal section high resolution image sequence of a longitudinal section view illuminated by a laser beam coincident with a longitudinal section of a gas-solid two-phase flow field; A cross-sectional scattered light capture module for capturing a cross-sectional conventional resolution image sequence of a cross-sectional viewpoint illuminated by a laser beam coinciding with a cross section of a gas-solid two-phase flow field; The image processing module is used to receive and process the longitudinal section conventional resolution image sequence, the longitudinal section high resolution image sequence and the cross section conventional resolution image sequence to obtain the solid phase mass flow rate of the gas-solid two-phase flow.

[0007] Furthermore, the image processing module includes a high-resolution reconstruction module and a high-resolution reconstruction data processing module. The high-resolution reconstruction module extracts high-order optical mapping of scattered light characteristics of solid phase particles in the longitudinal section conventional resolution image sequence and the longitudinal section high-resolution image sequence based on the cGAN-ResNet dual network deep learning algorithm, and establishes a high-resolution reconstruction model; The high-resolution reconstruction data processing module processes the conventional-resolution image sequence of the longitudinal section and the conventional-resolution image sequence of the cross section based on the high-resolution reconstruction model to obtain the high-resolution reconstruction data of the longitudinal section and the high-resolution reconstruction data of the cross section, and obtains the solid phase mass flow rate of the gas-solid two-phase flow based on the high-resolution reconstruction data of the longitudinal section and the high-resolution reconstruction data of the cross section.

[0008] Furthermore, the high-resolution reconstruction data processing module includes a solid phase particle three-dimensional space distribution module, a solid phase particle velocity field distribution module and a solid phase particle mass distribution module. The solid-phase particle three-dimensional spatial distribution module obtains the three-dimensional spatial distribution of solid-phase particles in the overlapping area of ​​the longitudinal section conventional resolution image sequence and the cross-sectional conventional resolution image sequence based on the longitudinal section high-resolution reconstruction data and the cross-sectional high-resolution reconstruction data; The solid-phase particle velocity field distribution module is used to process the high-resolution reconstruction data of the longitudinal section to obtain the radial distribution of the velocity value of the solid-phase particle flow in the longitudinal section, and then obtain the velocity field distribution of the solid-phase particle flow in the cross section; The solid phase particle mass distribution module is used to process the cross-section high-resolution reconstruction data to obtain the solid phase particle mass distribution within the cross-section.

[0009] Furthermore, the solid-phase particle velocity field distribution module includes: based on the cross-correlation particle velocity solution algorithm, processing the longitudinal section high-resolution reconstruction data to obtain the radial distribution of velocity values ​​in the longitudinal section of the solid-phase particle flow, and calculating the velocity field distribution of the solid-phase particle flow in the cross section based on the circumferential equality assumption; The solid-phase particle mass distribution module includes: based on the local scattered light relative light intensity algorithm, processing the cross-section high-resolution reconstruction data to obtain the relative light intensity distribution within the cross-section, and establishing an inversion model between the local relative light intensity and the solid-phase particle mass distribution according to the three-dimensional spatial distribution of the solid-phase particles in the overlapping area, and then calculating the solid-phase particle mass distribution in the entire cross-section based on the relative light intensity distribution.

[0010] Furthermore, the high-resolution reconstruction module includes an image module, a cGAN network module, an inter-frame matching module and a ResNet network module. The image module is used to receive a conventional resolution image sequence and a longitudinal section high resolution image sequence, and to crop the longitudinal section conventional resolution image sequence according to the spatial correspondence between the two image sequences, and to input the cropping result into the cGAN network module; The cGAN network module is used to receive the cropping result and extract the image features of the longitudinal section conventional resolution image sequence, obtain the imitation image close to the longitudinal section high resolution image sequence by processing the image features and output it to the inter-frame matching module; The inter-frame matching module is used to receive the imitation image of the longitudinal section high-resolution image sequence and the longitudinal section high-resolution image sequence, and obtain the spatial position distribution of the solid phase particles based on the inter-frame matching inversion, and input the spatial position distribution into the ResNet network module; The ResNet network module is used to receive the spatial position distribution, determine the difference area between the imitation image of the longitudinal section high-resolution image sequence and the longitudinal section high-resolution image sequence, and transmit it to the cGAN network module, so that the cGAN network module can be automatically optimized.

[0011] Furthermore, the high-resolution reconstruction module includes an image module, a cGAN network module, an inter-frame matching module and a ResNet network module. The image module is used to receive a conventional resolution image sequence and a longitudinal section high resolution image sequence, and to crop the longitudinal section conventional resolution image sequence according to the spatial correspondence between the two image sequences, and to input the cropping result into the cGAN network module; The cGAN network module is used to receive the cropping result and extract the image features of the longitudinal section conventional resolution image sequence, obtain the imitation image close to the longitudinal section high resolution image sequence by processing the image features and output it to the inter-frame matching module; The inter-frame matching module is used to receive the longitudinal section high-resolution image sequence imitation image, and calculate the spatial position distribution of the solid phase particles according to the longitudinal section high-resolution image sequence, and input the spatial position distribution into the ResNet network module; The ResNet network module is used to receive the spatial position distribution, determine the difference area between the imitation image of the longitudinal section high-resolution image sequence and the longitudinal section high-resolution image sequence, and transmit it to the cGAN network module, so that the cGAN network module can be automatically optimized.

[0012] Furthermore, the amplified scattered light capture module is arranged in a direction perpendicular to the longitudinal section of the gas-solid two-phase flow field, and makes the capture field of view coincide with the laser irradiation area of ​​the laser beam that coincides with the longitudinal section of the gas-solid two-phase flow field; the cross-sectional scattered light capture module is arranged in a direction deviating from the gas-solid two-phase flow field, and makes the capture field of view coincide with the laser irradiation area of ​​the laser beam that coincides with the cross-section of the gas-solid two-phase flow field.

[0013] Furthermore, the amplified scattered light capture module comprises: A longitudinal section conventional resolution image sequence acquisition module is used to capture the scattered light signals emitted by solid phase particles when irradiated by the laser beam at the longitudinal section viewing angle and perform a primary amplification on the signals, and acquire the longitudinal section conventional resolution image sequence after the primary amplification; A longitudinal section high-resolution image sequence acquisition module is used to perform a second amplification on the longitudinal section conventional-resolution image sequence after the initial amplification at the longitudinal section viewing angle, and acquire the longitudinal section high-resolution image sequence after the second amplification; The cross-sectional scattered light capture module comprises: The cross-sectional normal-resolution image sequence acquisition module is used to capture the scattered light signals emitted by solid-phase particles when irradiated by the laser beam at a cross-sectional perspective and perform a primary amplification on the signals, and to acquire the cross-sectional normal-resolution image sequence after the primary amplification.

[0014] Furthermore, the longitudinal section conventional resolution image sequence acquisition module includes a primary amplification module, a spectroscopic module and a first image acquisition module, wherein the spectroscopic module is connected to the primary amplification module and to the first image acquisition module; The longitudinal section high-resolution image sequence acquisition module includes a secondary amplification module and a second image acquisition module, wherein the secondary amplification module is connected to the light splitting module and to the second image acquisition module; The cross-sectional conventional resolution image sequence acquisition module comprises an adjustable multiplication module and a third image acquisition module connected thereto.

[0015] Furthermore, the orthogonal laser light source module includes a first laser, a first cylindrical shaping optical path, a second laser and a second cylindrical shaping optical path, the first laser and the first cylindrical shaping optical path are used to form a laser beam that coincides with the longitudinal section of the gas-solid two-phase flow field; the second laser and the second cylindrical shaping optical path are used to form a laser beam that coincides with the cross-section of the gas-solid two-phase flow field.

[0016] The present invention also provides a method for measuring the mass flow rate of gas-solid two-phase flow based on scattered light imaging, and the technical solution adopted is: A method for measuring the mass flow rate of a gas-solid two-phase flow based on scattered light imaging comprises the following steps: S1, outputting two laser beams that are orthogonal to each other and coincide with the cross section and longitudinal section of the gas-solid two-phase flow field through an orthogonal laser light source module; S2, capturing a longitudinal section conventional resolution image sequence and a longitudinal section high resolution image sequence of a longitudinal section perspective illuminated by one of the two laser beams through a scattered light capture module with different magnification, and obtaining radial characteristics of solid phase particle flow; S3, capturing a cross-sectional conventional resolution image sequence of a cross-sectional viewpoint illuminated by a laser beam that coincides with the cross-sectional view of the gas-solid two-phase flow field through a cross-sectional scattered light capture module, and obtaining the diffraction characteristics and position distribution of solid phase particles; S4, receiving and processing the longitudinal section normal resolution image sequence, the longitudinal section high resolution image sequence and the cross section normal resolution image sequence through an image processing module to obtain the solid phase mass flow rate of the gas-solid two-phase flow.

[0017] Compared with the prior art, the device and method for measuring the mass flow rate of gas-solid two-phase flow based on scattered light imaging of the present application, by setting an orthogonal laser light source module to output two laser beams that are orthogonal to each other and coincide with the cross-section and longitudinal section of the gas-solid two-phase flow field, and by using a different-magnification scattered light capture module to capture a longitudinal section conventional resolution image sequence and a longitudinal section high-resolution image sequence at the longitudinal section viewing angle illuminated by the laser beam coincident with the longitudinal section of the gas-solid two-phase flow field, and by using a cross-section scattered light capture module to capture a cross-section conventional resolution image sequence at the cross-section viewing angle illuminated by the laser beam coincident with the cross-section of the gas-solid two-phase flow field, thereby realizing multi-field coupling of different magnifications and different observation viewing angles, and being able to take into account the different flow characteristics of dilute / dense phase and low / high-speed gas-solid two-phase flow, and obtain precise The accurate mass flow rate measurement has a wide range of applicable working conditions and high measurement accuracy, and meets the gas-solid two-phase flow test requirements with high particle concentration distribution under complex conditions. The visualized measurement results obtained by the measuring device and method can be used to analyze flow process parameters such as the instantaneous concentration distribution of solid particles and the velocity field distribution, and can serve the theoretical research on the control and optimization of gas-solid two-phase flow. The key equipment in the orthogonal laser light source module, the amplified scattered light capture module, and the cross-sectional scattered light capture module used in the measuring device and method are not sensitive to environmental conditions such as noise, temperature / humidity, and electromagnetic interference in the measurement environment, and can be applied to most industrial production environments. The measuring device and method are developed based on the principle of optical method. As a non-invasive measurement technology, it does not interfere with the gas-solid two-phase flow field during the measurement process.

[0018] The image processing module includes a high-resolution reconstruction module and a high-resolution reconstruction data processing module. The high-resolution reconstruction module extracts high-order optical mapping of solid-phase particle scattering light characteristics in the longitudinal section conventional resolution image sequence and the longitudinal section high-resolution image sequence based on the cGAN-ResNet dual network deep learning algorithm, and establishes a high-resolution reconstruction model; the high-resolution reconstruction data processing module processes the longitudinal section conventional resolution image sequence and the cross-section conventional resolution image sequence based on the high-resolution reconstruction model to obtain the longitudinal section high-resolution reconstruction data and the cross-section high-resolution reconstruction data, and obtains the solid phase mass flow rate of the gas-solid two-phase flow based on the high-resolution reconstruction data, and further improves the accuracy of the solid phase mass flow rate measurement based on the cGAN-ResNet dual network deep learning algorithm.

[0019] The amplified scattered light capture module is arranged in a direction perpendicular to the longitudinal section of the gas-solid two-phase flow field, and makes the captured field of view coincide with the laser irradiation area of ​​the laser beam that coincides with the longitudinal section of the gas-solid two-phase flow field; the cross-sectional scattered light capture module is arranged in a direction deviating from the gas-solid two-phase flow field, and makes the captured field of view coincide with the laser irradiation area of ​​the laser beam that coincides with the cross-section of the gas-solid two-phase flow field, so that the captured conventional resolution image has the largest field of view and can completely cover the radial direction of the powder flow, and all scattered light images in the captured high-resolution image can clearly distinguish the diffraction characteristics and position distribution of the particles, thereby improving the measurement accuracy.

[0020] The different-magnification scattered light capture module includes: a longitudinal section conventional resolution image sequence acquisition module, which is used to collect the longitudinal section conventional resolution image sequence after the initial amplification of the scattered light signal emitted by the solid phase particles when irradiated by the laser beam at the longitudinal section viewing angle; a longitudinal section high-resolution image sequence acquisition module, which is used to collect the longitudinal section high-resolution image sequence after the images in the longitudinal section conventional resolution image sequence after the initial amplification at the longitudinal section viewing angle; and a cross-sectional scattered light capture module includes: a cross-sectional conventional resolution image sequence acquisition module, which is used to collect the cross-sectional conventional resolution image sequence after the initial amplification of the scattered light signal emitted by the solid phase particles when irradiated by the laser beam at the cross-sectional viewing angle, thereby realizing the coupling of fields of view with different magnifications and improving the accuracy of the mass flow rate measurement obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of an open gas-solid two-phase flow mass flow rate measurement scheme in a gas-solid two-phase flow mass flow rate measurement device based on scattered light imaging according to an embodiment of the present invention; Figure 2 It is a schematic diagram of a closed gas-solid two-phase flow mass flow rate measurement scheme in a gas-solid two-phase flow mass flow rate measurement device based on scattered light imaging according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the calibration test layout involved in the closed gas-solid two-phase flow measurement scheme in the gas-solid two-phase flow mass flow rate measurement device based on scattered light imaging in an embodiment of the present invention; Figure 4 It is a schematic diagram of an image processing algorithm in an image processing module in a device for measuring the mass flow rate of a gas-solid two-phase flow based on scattered light imaging according to an embodiment of the present invention; Figure 5 It is a flow chart of high-resolution reconstruction model training in a device for measuring gas-solid two-phase flow mass flow rate based on scattered light imaging according to an embodiment of the present invention; In the figure, 1-first laser; 2-first reflector; 3-first plano-concave lens; 4-first plano-convex lens; 5-first plano-concave cylindrical mirror; 6-first bandpass filter; 7-primary magnifying lens; 8-beam splitter; 9-dual-frame camera; 10-secondary magnifying end; 11-first CCD camera; 12-first sheet-like laser beam; 13-gas-solid two-phase flow generator; 14-computer; 15-second laser; 16-second reflector; 17-second plano-concave lens ; 18-second plano-convex lens; 19-second plano-concave cylindrical mirror; 20-second thin sheet laser beam; 21-second bandpass filter; 22-adjustable multiplication lens; 23-second CCD camera; 24-timing controller; 25-first three-way signal connector; 26-second three-way signal connector; 27-third three-way signal connector; 28-transparent pipe section; 29-gas-solid two-phase flow transport channel; 30-square calibration chessboard; 31-export transport section. DETAILED DESCRIPTION

[0022] As cited in the background technology, the optical measurement method in the prior art cannot meet the test requirements of gas-solid two-phase flow with high-concentration particle distribution under complex conditions. Therefore, the present invention provides a gas-solid two-phase flow mass flow rate measurement device based on scattered light imaging, including: an orthogonal laser light source module, used to output two laser beams, and make the two laser beams orthogonal to each other and coincide with the cross-section and longitudinal section of the gas-solid two-phase flow field, so as to achieve field coupling of different observation angles; a different-magnification scattered light capture module, used to capture the longitudinal section conventional resolution image sequence and the longitudinal section high-resolution image sequence of the longitudinal section perspective illuminated by the laser beam coincident with the longitudinal section of the gas-solid two-phase flow field; a cross-section scattered light capture module, used to capture the longitudinal section perspective illuminated by the laser beam coincident with the longitudinal section of the gas-solid two-phase flow field; The cross-sectional conventional resolution image sequence of the cross-sectional perspective illuminated by the laser beam with overlapping cross-sectional views of the solid two-phase flow field realizes the coupling of fields of view with different magnifications; the image processing module is used to receive and process the longitudinal section conventional resolution image sequence, the longitudinal section high resolution image sequence and the cross-sectional conventional resolution image sequence, taking into account the different flow characteristics of dilute / dense phase and low / high speed gas-solid two-phase flow, and then obtain the accurate solid phase mass flow rate of the gas-solid two-phase flow. It has a wide range of applicable working conditions and high measurement accuracy, and meets the gas-solid two-phase flow test needs with high concentration particle distribution under complex conditions.

[0023] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] The following describes a device and method for measuring the mass flow rate of a gas-solid two-phase flow based on scattered light imaging according to an embodiment of the present application with reference to the accompanying drawings.

[0026] Combine the following Figure 1 , the gas-solid two-phase flow mass flow rate measuring device based on scattered light imaging provided in the present application is described in detail.

[0027] Reference Figure 1 , a device for measuring the mass flow rate of a gas-solid two-phase flow based on scattered light imaging, comprising an orthogonal laser light source module, a scattered light capture module with different magnifications, a cross-section scattered light capture module and an image processing module. The orthogonal laser light source module is used to output two laser beams that are orthogonal to each other and coincide with the cross section and longitudinal section of the gas-solid two-phase flow field; the scattered light capture module with different magnifications is arranged in a direction perpendicular to the longitudinal section of the gas-solid two-phase flow field, and makes the capture field of view coincide with the laser irradiation area of ​​the laser beam that coincides with the longitudinal section of the gas-solid two-phase flow field, and is used to capture a longitudinal section conventional resolution image sequence and a longitudinal section high resolution image sequence of the longitudinal section perspective illuminated by the laser beam that coincides with the longitudinal section of the gas-solid two-phase flow field; the cross-section The surface scattered light capture module is arranged in a direction deviating from the gas-solid two-phase flow field, and makes the capture field of view coincide with the laser irradiation area of ​​the laser beam that coincides with the cross-section of the gas-solid two-phase flow field, and is used to capture the cross-sectional normal-resolution image sequence of the cross-sectional view angle illuminated by the laser beam that coincides with the cross-section of the gas-solid two-phase flow field; the image processing module is used to receive and process the longitudinal section normal-resolution image sequence, the longitudinal section high-resolution image sequence and the cross-sectional normal-resolution image sequence to obtain the solid phase mass flow rate of the gas-solid two-phase flow.

[0028] Specifically, the amplified scattered light capture module includes: a longitudinal section conventional resolution image sequence acquisition module, which is used to capture the scattered light signal emitted by the solid phase particles when they are irradiated by the laser beam at the longitudinal section viewing angle and perform the initial amplification on it, and collect the longitudinal section conventional resolution image sequence after the initial amplification; a longitudinal section high-resolution image sequence acquisition module, which is used to perform the secondary amplification on the longitudinal section conventional resolution image sequence after the initial amplification at the longitudinal section viewing angle, and collect the longitudinal section high-resolution image sequence after the secondary amplification; the cross-sectional scattered light capture module includes a cross-sectional conventional resolution image sequence acquisition module, which is used to capture the scattered light signal emitted by the solid phase particles when they are irradiated by the laser beam at the cross-sectional viewing angle and perform the initial amplification on it, and collect the cross-sectional conventional resolution image sequence after the initial amplification.

[0029] In a specific embodiment of the present application, an orthogonal laser light source module includes a first laser 1, a first cylindrical shaping optical path, a second laser 15 and a second cylindrical shaping optical path. The first laser 1 and the first cylindrical shaping optical path are used to form a first thin sheet laser beam that coincides with the longitudinal section of the gas-solid two-phase flow field. The second laser 15 and the second cylindrical shaping optical path are used to form a second thin sheet laser beam that coincides with the cross-section of the gas-solid two-phase flow field. The two thin sheet laser beams are orthogonal to each other and have different wavelengths. Specifically, the laser output wavelengths of the first laser 1 and the second laser 15 are both within the visible light wavelength range (400-700nm), and the wavelength difference between the two is about 100nm; the lasers output by the first laser 1 and the second laser 15 are circular light beams with a diameter of about 7mm; the first cylindrical shaping optical path is composed of a first reflector 2, a first plano-concave lens 3, a first plano-convex lens 4, and a first plano-concave cylindrical mirror 5; the second cylindrical shaping optical path is similar to the first cylindrical shaping optical path, and specifically consists of a second reflector 16, a second plano-concave lens 17, a second plano-convex lens 18 and a second plano-concave cylindrical mirror 19. When performing optical measurement, the circular light beam output by the first laser 1 has its optical path adjusted by the first reflector 2, is expanded by the first plano-concave lens 3, has its beam diameter adjusted by the first plano-convex lens 4, and is two-dimensionally shaped by the first plano-concave cylindrical mirror 5 to form a first thin sheet-like laser light beam 12 with adjustable thickness; similar to the above process, the circular light beam output by the second laser 15 can output a second thin sheet-like laser light beam 20 after optical path shaping; in the area to be measured in the gas-solid two-phase flow field, the first thin sheet-like laser light beam 12 and the second thin sheet-like laser light beam 20 should be kept strictly orthogonal, and the two should coincide with the cross-section and longitudinal section of the flow field.

[0030] In a specific embodiment of the present application, the longitudinal section conventional resolution image sequence acquisition module includes a primary amplification module, a spectroscopic module and a first image acquisition module, the spectroscopic module is connected to the primary amplification module and connected to the first image acquisition module; the longitudinal section high resolution image sequence acquisition module includes a secondary amplification module and a second image acquisition module, the secondary amplification module is connected to the spectroscopic module and connected to the second image acquisition module; the cross-sectional conventional resolution image sequence acquisition module includes an adjustable multiplication module and a third image acquisition module connected thereto. Specifically, the amplified scattered light capture module also includes a first bandpass filter 6, which is used to filter optical signals other than the wavelength of the light output by the first laser 1, and is installed at the front end of the amplified scattered light capture module; the longitudinal section conventional resolution image sequence acquisition module includes a primary amplification lens 7, a spectrometer 8 and a dual-frame camera 9; the longitudinal section high resolution image sequence acquisition module includes a secondary amplification end 10 and a first CCD camera 11. The cross-sectional scattered light capture module also includes a second bandpass filter 21, which is used to filter optical signals other than the wavelength of the light output by the second laser 15, and should be installed at the front end of the cross-sectional scattered light capture module during measurement; the cross-sectional conventional resolution image sequence acquisition module includes an adjustable multiplication lens 22 and a second CCD camera 23. Among them, the image processing module is connected to the dual-frame camera 9, the first CCD camera 11 and the second CCD camera 23, and the first CCD camera 11 and the second CCD camera 23 are externally triggered image signal receivers with high resolution; the dual-frame camera 9 can quickly capture two consecutive frames of field of view images within a time interval of 50-400ns.

[0031] When optical measurement is performed, the solid particles in the gas-solid two-phase flow are illuminated by the two mutually orthogonal thin-sheet light sources mentioned above, and scattered light signals are emitted to the surroundings; in the longitudinal section perspective, the scattered light signal carrying the spatial distribution information of the solid particles first passes through the first bandpass filter 6 to filter out stray signals, and after the primary amplification by the primary magnifying lens 7, the spectrometer 8 divides the captured longitudinal section conventional resolution image sequence into two, wherein one image in the image sequence is directly captured by the double-frame camera 9 to obtain the longitudinal section conventional resolution image sequence of the longitudinal section perspective; the other image is secondary amplified by the secondary amplifying end 10, and then captured by the first CCD camera 11 to obtain the longitudinal section high-resolution image sequence of the longitudinal section perspective, and transmitted to the image processing module. In the cross-sectional perspective, the scattered light signal first passes through the second bandpass filter 21 to filter out stray signals, and after optical amplification by the adjustable multiplying lens 22, the optical signal is captured by the second CCD camera 23 to obtain the cross-sectional conventional resolution image sequence of the cross-sectional perspective, and transmitted to the image processing module. All scattered light images in the longitudinal section conventional resolution image sequence and the cross-sectional conventional resolution image sequence have a large field of view and can completely cover the radial direction of powder flow; all scattered light images in the longitudinal section high-resolution image sequence can clearly distinguish the diffraction characteristics and position distribution of the particles.

[0032] The image processing module is used to receive and process the longitudinal section conventional resolution image sequence, the longitudinal section high resolution image sequence and the cross section conventional resolution image sequence to obtain the solid phase mass flow rate of the gas-solid two-phase flow. Specifically, the image processing module is a high-performance computer 14, which is connected to the first CCD camera 11, the second CCD camera 23 and the double-frame camera 9 during measurement. Its function is to receive the images captured by the above devices and use the built-in image reading, processing and algorithm to process them to obtain the solid phase mass flow rate of the gas-solid two-phase flow.

[0033] In another embodiment of the present application, the device for measuring the mass flow rate of gas-solid two-phase flow based on scattered light imaging further includes a timing control module for outputting an external trigger signal containing timing information and controlling each module to act according to timing logic. The timing control module is a timing controller 24, which is used to output an external trigger signal containing timing information to optical devices such as the first laser 1, the second laser 15, the first CCD camera 11, the second CCD camera 23, and the dual-frame camera 9, and control the above-mentioned devices to act strictly according to the timing logic through the external trigger signal.

[0034] In a specific embodiment of the present application, Figure 4As shown, the image processing module includes a high-resolution reconstruction module and a high-resolution reconstruction data processing module. The high-resolution reconstruction module extracts high-order optical mapping of solid-phase particle scattering light characteristics in the longitudinal section conventional resolution image sequence and the longitudinal section high-resolution image sequence based on the cGAN-ResNet dual network deep learning algorithm, and establishes a high-resolution reconstruction model; the high-resolution reconstruction data processing module processes the longitudinal section conventional resolution image sequence and the cross-section conventional resolution image sequence based on the high-resolution reconstruction model to obtain the longitudinal section high-resolution reconstruction data and the cross-section high-resolution reconstruction data, and obtains the solid phase mass flow rate of the gas-solid two-phase flow according to the longitudinal section high-resolution reconstruction data and the cross-section high-resolution reconstruction data.

[0035] Specifically, the high-resolution reconstruction data processing module includes a solid-phase particle three-dimensional spatial distribution module, a solid-phase particle velocity field distribution module and a solid-phase particle mass distribution module. The solid-phase particle three-dimensional spatial distribution module obtains the three-dimensional spatial distribution of solid-phase particles in the overlapping area of ​​the longitudinal section conventional resolution image sequence and the cross-sectional conventional resolution image sequence based on the longitudinal section high-resolution reconstruction data and the cross-sectional high-resolution reconstruction data; the solid-phase particle velocity field distribution module is used to process the longitudinal section high-resolution reconstruction data to obtain the radial distribution of the velocity value of the solid-phase particle flow in the longitudinal section, and then obtain the velocity field distribution of the solid-phase particle flow in the cross section; the solid-phase particle mass distribution module is used to process the cross-sectional high-resolution reconstruction data to obtain the solid-phase particle mass distribution in the cross section.

[0036] The solid-phase particle velocity field distribution module includes: based on the cross-correlation particle velocity solution algorithm, the high-resolution reconstruction data of the longitudinal section is processed to obtain the radial distribution of the velocity value in the longitudinal section of the solid-phase particle flow, and the velocity field distribution of the solid-phase particle flow in the cross section is calculated based on the circumferential equality assumption; the solid-phase particle mass distribution module includes: based on the local scattered light relative intensity algorithm, the high-resolution reconstruction data of the cross-section is processed to obtain the relative light intensity distribution in the cross section, and according to the three-dimensional spatial distribution of the solid-phase particles in the overlapping area, the inversion model between the local relative light intensity and the solid-phase particle mass distribution is established, and then the solid-phase particle mass distribution in the entire cross section is calculated based on the relative light intensity distribution. Finally, the instantaneous mass flow rate of the solid-phase particle flow can be calculated in combination with the velocity field distribution in the cross section.

[0037] Reference Figure 4 The image processing algorithm process involved in the present invention is specifically as follows: First, the longitudinal section conventional resolution image sequence A, the longitudinal section high resolution image sequence B and the cross section conventional resolution image sequence C read into the computer 14 are classified and stored in different folders; the longitudinal section conventional resolution image sequence A and the longitudinal section high resolution image sequence B are extracted, the image sequence A is cropped according to the spatial correspondence between the two image sequences, and the obtained results are imported into the dual network deep learning algorithm (cGAN-ResNet) embedded in the processing terminal, and the high-order optical mapping of the particle scattered light characteristics implicit in the longitudinal section conventional resolution image and the longitudinal section high resolution image is obtained by training the model, and a high-resolution reconstruction model is obtained; Secondly, the full-frame longitudinal section conventional resolution image sequence A and the cross-sectional conventional resolution image sequence C are imported into the high-resolution reconstruction model for processing, and the longitudinal section high-resolution reconstruction result D (corresponding to image sequence A) and the cross-sectional high-resolution reconstruction result E (corresponding to image sequence C) can be obtained. That is, under the original field of view size of image sequence A and image sequence C, the clarity of the particles in the image reaches the high-resolution level of image sequence B; Next, based on the high-resolution reconstruction results D and E obtained in the previous step, the spatial position information of the particles in the image is extracted and obtained using the grayscale information in the high-resolution reconstruction results D and E, and then the three-dimensional spatial distribution M of the particles in the overlapping area of ​​the two images can be calculated; Then, the cross-correlation-based particle velocity solution algorithm embedded in the computer 14 is used to process the high-resolution reconstruction result D of the longitudinal section to obtain the radial distribution of the velocity value in the longitudinal section of the solid phase particle flow, and the velocity field distribution of the particle flow in the cross section is calculated based on the circumferential equality assumption; Next, the local scattered light relative intensity algorithm embedded in the computer 14 is used to process the cross-sectional high-resolution reconstruction result E to obtain the relative intensity distribution L in the cross section, and an inversion model between the local relative intensity and the particle mass distribution is established according to the particle spatial distribution M in the overlapping area, and then the particle mass distribution in the entire cross section is calculated based on the relative intensity distribution L; Finally, the instantaneous mass flow rate of the solid phase powder particle flow can be calculated based on the velocity field distribution in the cross section.

[0038] In another specific embodiment of the present application, Figure 5As shown, the high-resolution reconstruction module includes an image module, a cGAN network module, an inter-frame matching module and a ResNet network module. The image module is used to receive a conventional resolution image sequence and a longitudinal section high-resolution image sequence, and to crop the longitudinal section conventional resolution image sequence according to the spatial correspondence between the two image sequences, and to input the cropping result into the cGAN network module; the cGAN network module is used to receive the cropping result and extract the image features of the longitudinal section conventional resolution image sequence, and to obtain a replica image close to the longitudinal section high-resolution image sequence by processing the image features and output it to the inter-frame matching module; the inter-frame matching module is used to receive the replica image of the longitudinal section high-resolution image sequence and the longitudinal section high-resolution image sequence, and to obtain the spatial position distribution of the solid phase particles based on the inter-frame matching inversion, and to input the spatial position distribution into the ResNet network module; the ResNet network module is used to receive the spatial position distribution, determine the difference area between the replica image of the longitudinal section high-resolution image sequence and the longitudinal section high-resolution image sequence, and transmit it to the cGAN network module, so that the cGAN network module can be automatically optimized. After multiple cycles, the high-order optical mapping of the particle scattered light characteristics hidden in the conventional resolution and high-resolution images can be obtained, and a high-resolution reconstruction model can be obtained.

[0039] Reference Figure 5 The specific process of high-resolution reconstruction model training involved in the present invention is as follows: The high-resolution reconstruction module based on the cGAN-ResNet dual network deep learning algorithm includes image cropping, cGAN network, inter-frame matching program, and ResNet network. First, the longitudinal section conventional resolution image sequence A and the longitudinal section high-resolution image sequence B are stored in the memory of the computer 14; the algorithm automatically extracts the longitudinal section conventional resolution image sequence A and the longitudinal section high-resolution image sequence B, and crops the longitudinal section conventional resolution image sequence A according to the spatial correspondence between the two image sequences; secondly, the cropped result will be directly imported into the cGAN network, which extracts the image features of the longitudinal section conventional resolution image sequence A through a multi-layer convolutional network, and optimizes the weight parameters through the principle of fastest gradient descent to output a replica image close to the longitudinal section high-resolution image sequence B; then, the longitudinal section high-resolution The replica image of image sequence B and the longitudinal section high-resolution image sequence B are input into the inter-frame matching algorithm to calculate the spatial position distribution of the powder, and the result is imported into the ResNet network for comparison. The difference area between the replica image of the longitudinal section high-resolution image sequence B and the longitudinal section high-resolution image sequence B is determined through the U-net structure built into ResNet, and converted into binary information and transmitted to the cGAN network to enable the cGAN network to achieve automatic optimization. Finally, through multiple cycles, the high-order optical mapping of the particle scattering light characteristics implicit in the conventional resolution and high-resolution images can be obtained, and a high-resolution reconstruction model can be obtained.

[0040] The present invention provides a measurement scheme for measuring the mass flow rate of an open gas-solid two-phase flow using the above device. When the open gas-solid two-phase flow is measured using the device and method, it is only necessary to determine the measurement area in the jet free development area of ​​the gas-solid two-phase flow according to the measurement field of view of the first CCD camera 11, the second CCD camera 23 and the double-frame camera 9. Figure 1 The measurement scheme schematic diagram is shown in the measurement scheme diagram, wherein the output wavelength of the first laser 1 is 455nm, and the output wavelength of the second laser 15 is 532nm, as follows: First, install the first laser 1 at a suitable position directly above the gas-solid two-phase flow generator 13, and keep the output direction of the 455nm laser the same as the flow direction of the gas-solid two-phase flow. Install and fix the above lenses in the vertical downward direction in the order of the first reflector 2, the first plano-concave lens 3, the first plano-convex lens 4, and the first plano-concave cylindrical mirror 5, wherein the first reflector 2 is installed at a vertical 45° tilt to correct the direction of the horizontally output laser beam to vertically downward. The first plano-concave lens 3, the first plano-convex lens 4, and the first plano-concave cylindrical mirror 5 are all installed horizontally, and a circular beam with a diameter of 7mm can be shaped into a first thin sheet laser beam 12 with a thickness of 2mm and a length of 5cm. By adjusting the position of the above lenses, the first thin sheet laser beam 12 is aligned with the longitudinal section of the center of the gas-solid two-phase flow area; Install the second laser 15 at a suitable position on the left side of the gas-solid two-phase flow generator 13, and keep the output direction of the 532nm laser the same as the flow direction of the gas-solid two-phase flow. Install the second reflector 16, the second plano-concave lens 17, the second plano-convex lens 18 and the second plano-concave cylindrical mirror 19 in the order of the above lenses in the horizontal direction perpendicular to the flow direction of the two-phase flow, wherein the second reflector 16 is installed at a horizontal angle of 45° to correct the direction of the laser beam parallel to the flow direction of the two-phase flow to a direction perpendicular to the flow direction of the two-phase flow, and the second plano-concave lens 17, the second plano-convex lens 18 and the second plano-concave cylindrical mirror 19 are all installed vertically, which can shape the circular beam with a diameter of 7mm into a second thin sheet laser beam 20 with a thickness of 2mm and a length of 5cm. By adjusting the positions of the above lenses, the second thin sheet laser beam 20 is aligned with the cross section of the gas-solid two-phase flow area; Adjust the positions of the first laser 1, the second laser 15 and their respective attached optical paths to ensure that the overlapping area of ​​the first sheet-shaped laser beam 12 and the second sheet-shaped laser beam 20 reaches 2 mm×2 mm×5 cm; Secondly, the optical axis of the amplified scattered light capture module is aligned with the center position of the first quasi-thin sheet laser beam 12 and fixed, and a bandpass filter with a transmission center wavelength of 460nm and a bandwidth of 25nm is selected as the first bandpass filter 6 and fixed to the front end of the primary magnifying lens 7, and the optical axes of the two are kept coincident; the optical axis of the cross-sectional scattered light capture module is aligned with the center of the cross-sectional area of ​​the gas-solid two-phase flow, and then the optical axis is offset 30° to the left in the horizontal plane and the module is translated to the left as a whole for a certain distance, so that the cross-sectional scattered light capture module avoids the gas-solid two-phase flow area, and a bandpass filter with a transmission center wavelength of 532nm and a bandwidth of 25nm is selected as the second bandpass filter 21 and fixed to the front end of the adjustable multiplying lens 22, and the optical axes of the two are kept coincident; Then, the timing controller 24 is used to output a 5V square wave signal for triggering the laser, CCD camera, double-frame camera 9 and other devices. The first three-way signal connector 25 is used to connect the channel 1 of the timing controller 24, and the output signal of the channel is divided into two, one of which is directly connected to the first laser 1, and the other is distributed to the first CCD camera 11 and the double-frame camera 9 through the second three-way signal connector 26. The third three-way signal connector 27 is used to connect the channel 2 of the timing controller 24, and the output signal of the channel is distributed to the second laser 15 and the second CCD camera 23.

[0041] Next, the first CCD camera 11 , the dual-frame camera 9 and the second CCD camera 23 are connected to the computer 14 using a communication optical cable to ensure that the images captured by each camera are efficiently transmitted and classified and saved in the computer 14 .

[0042] Then, each device is turned on and put in standby mode, and the synchronous trigger logic is set in the timing controller 24 at a frequency of 10 Hz to realize the synchronous action of the first laser 1, the second laser 15, the first CCD camera 11, the second CCD camera 23 and the dual-frame camera 9; click the start button of the timing controller 24, and each device starts to act. At this time, the gas-solid two-phase flow generator 13 is turned on to stably output the gas-solid two-phase flow in an open space. Wait for about 10 seconds, turn off the timing controller 24, and then turn off the gas-solid two-phase flow generator 13 to complete the image capture of the gas-solid two-phase flow.

[0043] Note: The above mentioned frequency of 10Hz and waiting time of 10s are assumed values ​​and can be changed according to actual measurement requirements.

[0044] Next, a longitudinal section conventional resolution image sequence A and a longitudinal section high resolution image sequence B are extracted in the computer 14, and the longitudinal section conventional resolution image sequence A is cropped according to the spatial correspondence between the two image sequences, and the obtained results are imported into the cGAN-ResNet dual network deep learning algorithm, and the high-order optical mapping of the particle scattered light characteristics implicit in the conventional resolution and high-resolution images is obtained by training the model, and a high-resolution reconstruction model is obtained; Then, the full-frame longitudinal section conventional resolution image sequence A and the cross-sectional conventional resolution image sequence C are imported into the high-resolution reconstruction model for processing, and the longitudinal section high-resolution reconstruction result D (corresponding to the image sequence A) and the cross-sectional high-resolution reconstruction result E (corresponding to the image sequence C) can be obtained. That is, under the original field of view size of the image sequence A and the image sequence C, the clarity of the particles in the image reaches the high-resolution level of the image sequence B; Next, based on the high-resolution reconstruction results D and E obtained in the previous step, the spatial position information of the particles in the image is extracted and obtained using the grayscale information in the high-resolution reconstruction results D and E, and then the three-dimensional spatial distribution M of the particles in the overlapping area of ​​the two images can be calculated; Then, the cross-correlation-based particle velocity solution algorithm embedded in the computer 14 is used to process the high-resolution reconstruction result D of the longitudinal section to obtain the radial distribution of the velocity value in the longitudinal section, and the velocity field distribution of the particle flow in the cross section is calculated based on the circumferential equality assumption; Next, the local scattered light relative intensity algorithm embedded in the computer 14 is used to process the cross-sectional high-resolution reconstruction result E to obtain the relative intensity distribution L in the cross section, and an inversion model between the local relative intensity and the particle mass distribution is established according to the particle spatial distribution M in the overlapping area, and then the particle mass distribution in the entire cross section is calculated based on the relative intensity distribution L; Finally, the instantaneous mass flow rate of the solid phase powder particle flow can be calculated based on the velocity field distribution in the cross section.

[0045] The present invention also proposes a measurement scheme for measuring the mass flow rate of a closed gas-solid two-phase flow using the above device. Figure 2 , Figure 3 As shown in the figure, closed gas-solid two-phase flow mostly exists as flow in a pipe. Before measurement, the original pipe in the measurement area should be replaced with a transparent pipe, and the imaging distortion caused by the transparent pipe should be considered during measurement. The detailed measurement steps are as follows: First, in the corresponding area of ​​the measurement area, the original pipe section material is replaced with a transparent pipe of appropriate length, and the installation and sealing work are completed to ensure that each camera can observe the longitudinal and cross-sectional flow characteristics of the gas-solid two-phase flow from the outside; First, the outlet transport section 31 connected to the gas-solid two-phase flow generator 13 is disassembled and replaced with a transparent pipe section 28, and the outlet of the transparent pipe section 28 is connected to the gas-solid two-phase flow transport channel 29 to form a closed gas-solid two-phase flow, and the installation and sealing work are completed to ensure that each camera can observe the longitudinal section and cross-sectional flow characteristics of the gas-solid two-phase flow from the outside; Secondly, according to the first four steps of the measurement scheme for mass flow rate measurement of open gas-solid two-phase flow, the installation and commissioning of the measurement device are completed; Next, before measuring the gas-solid two-phase flow, remove the debris in the pipe, install the square calibration chessboard 30 on the transparent pipe section 28, and its position should coincide with the first sheet-shaped laser beam 12. Without turning on the laser, use the first CCD camera 11 and the dual-frame camera 9 to shoot the square chessboard calibration object using natural light illumination to obtain the calibration original image; Then, after completing the above operations, the calibration plate of the square calibration chessboard 30 is horizontally rotated 90° so that its position coincides with the second sheet-shaped laser beam 20. Without turning on the laser, the square chessboard calibration object is photographed using the first CCD camera 11, the second CCD camera 23 and the dual-frame camera 9 using natural light illumination to obtain a calibration original image; Next, the above original image and the square chessboard standard image are input into the camera imaging distortion correction algorithm. Through the transformation between the pixel coordinate system and the world coordinate system, the intrinsic and extrinsic parameters of the three cameras are calculated, and then the radial distortion correction and tangential distortion correction of each camera are completed respectively, so that the imaging effect of each camera is consistent with the open system. Finally, according to the last 6 steps of the above-mentioned open gas-solid two-phase flow mass flow rate measurement scheme, the flow characteristic image capture and image post-processing of the gas-solid two-phase flow are completed, and the instantaneous mass flow rate of the powder particle flow can be calculated.

[0046] Using the above-mentioned gas-solid two-phase flow mass flow rate measuring device based on scattered light imaging, the present invention also provides a gas-solid two-phase flow mass flow rate measuring method based on scattered light imaging, and the gas-solid two-phase flow mass flow rate measuring method based on scattered light imaging comprises the following steps: Firstly, an orthogonal laser light source module is used to output two laser beams that are orthogonal to each other and coincide with the cross section and longitudinal section of the gas-solid two-phase flow field; Secondly, the longitudinal section conventional resolution image sequence and the longitudinal section high resolution image sequence of the longitudinal section view illuminated by one of the two laser beams are captured by the scattered light capture module with different magnification, so as to obtain the radial characteristics of the solid phase particle flow; Then, a cross-sectional scattered light capture module is used to capture a cross-sectional conventional resolution image sequence of a cross-sectional viewpoint illuminated by a laser beam that coincides with the cross-sectional area of ​​the gas-solid two-phase flow field, and the diffraction characteristics and position distribution of the solid phase particles are obtained; Finally, the image processing module receives and processes the longitudinal section normal resolution image sequence, the longitudinal section high resolution image sequence and the cross section normal resolution image sequence to obtain the solid phase mass flow rate of the gas-solid two-phase flow.

[0047] Here, those skilled in the art can understand that the specific operations of each step in the above-mentioned method for measuring the mass flow rate of gas-solid two-phase flow based on scattered light imaging have been described in the above reference. Figures 1 to 5 The above description has been introduced in detail in the description of the measurement device of the mass flow rate of gas-solid two-phase flow based on scattered light imaging, so its repeated description will be omitted.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A device for measuring the mass flow rate of gas-solid two-phase flow based on scattered light imaging. It is characterized in that include: An orthogonal laser light source module is used to output two laser beams that are orthogonal to each other and coincide with the cross-section and longitudinal section of the gas-solid two-phase flow field; A different magnification scattered light capture module is used to capture a longitudinal section conventional resolution image sequence and a longitudinal section high resolution image sequence of a longitudinal section view illuminated by a laser beam coincident with a longitudinal section of a gas-solid two-phase flow field; A cross-sectional scattered light capture module for capturing a cross-sectional conventional resolution image sequence of a cross-sectional viewpoint illuminated by a laser beam coinciding with a cross section of a gas-solid two-phase flow field; The image processing module is used to receive and process the longitudinal section conventional resolution image sequence, the longitudinal section high resolution image sequence and the cross section conventional resolution image sequence to obtain the solid phase mass flow rate of the gas-solid two-phase flow.

2. The device for measuring the mass flow rate of gas-solid two-phase flow based on scattered light imaging according to claim 1, It is characterized in that The image processing module includes a high-resolution reconstruction module and a high-resolution reconstruction data processing module. The high-resolution reconstruction module extracts high-order optical mapping of scattered light characteristics of solid phase particles in the longitudinal section conventional resolution image sequence and the longitudinal section high-resolution image sequence based on the cGAN-ResNet dual network deep learning algorithm, and establishes a high-resolution reconstruction model; The high-resolution reconstruction data processing module processes the conventional-resolution image sequence of the longitudinal section and the conventional-resolution image sequence of the cross section based on the high-resolution reconstruction model to obtain the high-resolution reconstruction data of the longitudinal section and the high-resolution reconstruction data of the cross section, and obtains the solid phase mass flow rate of the gas-solid two-phase flow based on the high-resolution reconstruction data of the longitudinal section and the high-resolution reconstruction data of the cross section.

3. The device for measuring the mass flow rate of gas-solid two-phase flow based on scattered light imaging according to claim 2, It is characterized in that The high-resolution reconstruction data processing module includes a solid phase particle three-dimensional space distribution module, a solid phase particle velocity field distribution module and a solid phase particle mass distribution module. The solid-phase particle three-dimensional spatial distribution module obtains the three-dimensional spatial distribution of solid-phase particles in the overlapping area of ​​the longitudinal section conventional resolution image sequence and the cross-sectional conventional resolution image sequence based on the longitudinal section high-resolution reconstruction data and the cross-sectional high-resolution reconstruction data; The solid-phase particle velocity field distribution module is used to process the high-resolution reconstruction data of the longitudinal section to obtain the radial distribution of the velocity value of the solid-phase particle flow in the longitudinal section, and then obtain the velocity field distribution of the solid-phase particle flow in the cross section; The solid phase particle mass distribution module is used to process the cross-section high-resolution reconstruction data to obtain the solid phase particle mass distribution within the cross-section.

4. The device for measuring the mass flow rate of gas-solid two-phase flow based on scattered light imaging according to claim 3, It is characterized in that The solid phase particle velocity field distribution module includes: based on the cross-correlation particle velocity solution algorithm, processing the longitudinal section high-resolution reconstruction data to obtain the radial distribution of velocity values ​​in the longitudinal section of the solid phase particle flow, and calculating the velocity field distribution of the solid phase particle flow in the cross section based on the circumferential equality assumption; The solid-phase particle mass distribution module includes: based on the local scattered light relative light intensity algorithm, processing the cross-section high-resolution reconstruction data to obtain the relative light intensity distribution within the cross-section, and establishing an inversion model between the local relative light intensity and the solid-phase particle mass distribution according to the three-dimensional spatial distribution of the solid-phase particles in the overlapping area, and then calculating the solid-phase particle mass distribution in the entire cross-section based on the relative light intensity distribution.

5. The device for measuring the mass flow rate of gas-solid two-phase flow based on scattered light imaging according to claim 2, It is characterized in that The high-resolution reconstruction module includes an image module, a cGAN network module, an inter-frame matching module and a ResNet network module. The image module is used to receive a conventional resolution image sequence and a longitudinal section high resolution image sequence, and to crop the longitudinal section conventional resolution image sequence according to the spatial correspondence between the two image sequences, and to input the cropping result into the cGAN network module; The cGAN network module is used to receive the cropping result and extract the image features of the longitudinal section conventional resolution image sequence, obtain the imitation image close to the longitudinal section high resolution image sequence by processing the image features and output it to the inter-frame matching module; The inter-frame matching module is used to receive the imitation image of the longitudinal section high-resolution image sequence and the longitudinal section high-resolution image sequence, and obtain the spatial position distribution of the solid phase particles based on the inter-frame matching inversion, and input the spatial position distribution into the ResNet network module; The ResNet network module is used to receive the spatial position distribution, determine the difference area between the imitation image of the longitudinal section high-resolution image sequence and the longitudinal section high-resolution image sequence, and transmit it to the cGAN network module, so that the cGAN network module can be automatically optimized.

6. The device for measuring the mass flow rate of gas-solid two-phase flow based on scattered light imaging according to claim 1, It is characterized in that The amplified scattered light capture module is arranged in a direction perpendicular to the longitudinal section of the gas-solid two-phase flow field, and makes the capture field of view coincide with the laser irradiation area of ​​the laser beam that coincides with the longitudinal section of the gas-solid two-phase flow field; the cross-sectional scattered light capture module is arranged in a direction deviating from the gas-solid two-phase flow field, and makes the capture field of view coincide with the laser irradiation area of ​​the laser beam that coincides with the cross-section of the gas-solid two-phase flow field.

7. The device for measuring the mass flow rate of gas-solid two-phase flow based on scattered light imaging according to claim 6, It is characterized in that The amplified scattered light capture module comprises: A longitudinal section conventional resolution image sequence acquisition module is used to capture the scattered light signals emitted by solid phase particles when irradiated by the laser beam at the longitudinal section viewing angle and perform a primary amplification on the scattered light signals, and acquire the longitudinal section conventional resolution image sequence after the primary amplification; A longitudinal section high-resolution image sequence acquisition module is used to perform a second amplification on the longitudinal section conventional-resolution image sequence after the initial amplification at the longitudinal section viewing angle, and acquire the longitudinal section high-resolution image sequence after the second amplification; The cross-sectional scattered light capture module comprises: The cross-sectional normal-resolution image sequence acquisition module is used to capture the scattered light signals emitted by solid-phase particles when irradiated by the laser beam at a cross-sectional perspective and perform a primary amplification on the signals, and to acquire the cross-sectional normal-resolution image sequence after the primary amplification.

8. The device for measuring the mass flow rate of gas-solid two-phase flow based on scattered light imaging according to claim 7, It is characterized in that The longitudinal section conventional resolution image sequence acquisition module comprises a primary amplification module, a spectroscopic module and a first image acquisition module, wherein the spectroscopic module is connected to the primary amplification module and to the first image acquisition module; The longitudinal section high-resolution image sequence acquisition module includes a secondary amplification module and a second image acquisition module, wherein the secondary amplification module is connected to the light splitting module and to the second image acquisition module; The cross-sectional conventional resolution image sequence acquisition module comprises an adjustable multiplication module and a third image acquisition module connected thereto.

9. The device for measuring the mass flow rate of gas-solid two-phase flow based on scattered light imaging according to claim 8, It is characterized in that The orthogonal laser light source module includes a first laser, a first cylindrical shaping light path, a second laser and a second cylindrical shaping light path. The first laser and the first cylindrical shaping light path are used to form a laser beam that coincides with the longitudinal section of the gas-solid two-phase flow field; the second laser and the second cylindrical shaping light path are used to form a laser beam that coincides with the cross-section of the gas-solid two-phase flow field.

10. Measurement method of gas-solid two-phase flow mass flow rate based on scattered light imaging, It is characterized in that The device for measuring the mass flow rate of gas-solid two-phase flow based on scattered light imaging according to any one of claims 1 to 9 comprises the following steps: S1, outputting two laser beams that are orthogonal to each other and coincide with the cross section and longitudinal section of the gas-solid two-phase flow field through an orthogonal laser light source module; S2, capturing a longitudinal section conventional resolution image sequence and a longitudinal section high resolution image sequence of a longitudinal section perspective illuminated by one of the two laser beams through a scattered light capture module with different magnification, and obtaining radial characteristics of solid phase particle flow; S3, capturing a cross-sectional conventional resolution image sequence of a cross-sectional viewpoint illuminated by a laser beam that coincides with the cross-sectional view of the gas-solid two-phase flow field through a cross-sectional scattered light capture module, and obtaining the diffraction characteristics and position distribution of solid phase particles; S4, receiving and processing the longitudinal section normal resolution image sequence, the longitudinal section high resolution image sequence and the cross section normal resolution image sequence through an image processing module to obtain the solid phase mass flow rate of the gas-solid two-phase flow.

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