A device for detecting the state of solid particles in a reactor and use thereof

Abstract

The application relates to a detection device for the state of solid particles in a reactor and the use thereof, to solve the problem that high-speed moving solid particles in the reactor cannot be detected on line, the detection device comprising: a probe arranged in the reactor, a telecentric lens, an image capturing device arranged in cooperation with the telecentric lens, a laser, a calibration plate, a synchronizer and an output and control system; the image capturing device, the synchronizer and the laser are sequentially connected; the output and control system is connected with the telecentric lens, the image capturing device, the laser and the synchronizer; and the probe and the telecentric lens are coaxially arranged. The detection device provided by the application can on-line observe high-speed moving micro-particles by using laser and a telecentric lens, and the boundary of the particles can be accurately and completely distinguished based on the reflection of the particles on the reflecting plate under the excitation of the laser beam, and the detection device is suitable for most working conditions.

Description

Technical Field

[0001] This invention relates to the field of particle characteristic measurement, specifically to a device for detecting the state of solid particles in a reactor and its application, and more particularly to a device for detecting the state of solid particles in a stirred tank or a stirred membrane reactor and its application. Background Technology

[0002] Currently, catalyst recycling and multiphase reactions are typically carried out within stirred reactors. However, with the improvement of catalyst performance and the reduction of catalyst size, membrane fouling has become a major problem limiting the reaction and separation efficiency of stirred-tube membrane reactors. Unlike conventional stirred reactors, this reactor involves the filtration and suspension of catalyst particles. On the one hand, the accumulation of catalyst particles on the membrane surface reduces membrane flux and affects separation efficiency; on the other hand, uneven distribution of the catalyst within the reactor affects reaction efficiency. Stirring can regulate multiphase flow and shear rate within the reactor, thereby suppressing particle accumulation and membrane fouling near the membrane. Therefore, studying the multiphase flow and filtration processes within stirred-tube membrane reactors, understanding the particle motion patterns, particle distribution, and membrane fouling mechanisms near the membrane at the particle scale, and obtaining methods for controlling membrane fouling are of great significance for the design, optimization, and scale-up of stirred-tube membrane reactors.

[0003] Studies on the microscopic morphology and structure of membrane fouling often employ ex-situ observation techniques, such as scanning electron microscopy and atomic force microscopy. While these techniques can analyze the surface or internal structure of the fouled membrane layer, they cannot provide an accurate and complete reflection of the dynamic processes of membrane fouling because they cannot perform online analysis.

[0004] Online observation techniques better reflect the dynamic changes of membrane fouling layers, more closely resembling real-world conditions. Precise characterization of these dynamic processes, especially at the micrometer or submicrometer scale, is crucial for confirming the mechanisms and models related to membrane fouling layer formation. Direct observation is a powerful, non-destructive, online method for observing particle deposition, adhesion, and cake formation on the membrane surface. However, due to limitations in the working distance of microscope objectives, direct observation can only be used to observe membrane fouling under cross-flow and dead-end filtration conditions. Therefore, observation of the formation process of membrane fouling in stirred membrane reactors remains insufficient.

[0005] For example, CN105738648A discloses an online method for measuring particle velocity in a multiphase system. Combining multiple exposure technology and image processing methods, it can measure the velocity distribution of particles such as bubbles, droplets, or solids within a multiphase reactor. However, the telecentric lens used has a relatively low magnification and a large field of view, resulting in limited image information for smaller particles and an inability to accurately describe the boundaries of microscopic particles. Furthermore, due to the limitations of small industrial cameras, it cannot measure particles moving at high speeds.

[0006] It is evident that further research is needed to observe the microscopic particles in high-speed systems within multiphase reactors. Summary of the Invention

[0007] In view of the problems existing in the prior art, the purpose of the present invention is to provide a device for detecting the state of solid particles in a reactor and its application, so as to solve the problem that high-speed moving solid particles in a reactor cannot be detected online dynamically.

[0008] To achieve this objective, the present invention adopts the following technical solution:

[0009] In a first aspect, the present invention provides a device for detecting the state of solid particles in a reactor, the device comprising: a probe disposed in the reactor, a telecentric lens, an image capture device configured with the telecentric lens, a laser, a calibration plate, a synchronizer, and an output and control system;

[0010] The image capture device, synchronizer, and laser are connected in sequence;

[0011] The output and control system is connected to the telecentric lens, image capture device, laser, and synchronizer;

[0012] The probe and the telecentric lens are coaxially arranged.

[0013] The detection device provided by this invention utilizes a laser and a telecentric lens. It captures images of particles based on the excitation of reflected light from a laser beam illuminating a reflector, followed by image processing using image capture software. This method enables online observation of high-speed moving microscopic particles, accurately and completely distinguishing particle boundaries, and is applicable to most working conditions.

[0014] Once the particle trajectory is captured by the image capture device, the tracer particles' velocity is calculated using a cross-correlation algorithm—that is, by measuring displacement changes within an extremely short time interval. Due to the excellent tracking ability of the tracer particles, their velocity is approximately equal to the velocity of the liquid phase. Specifically, by adding 40-60 micrometer quartz sand particles and 5-15 micrometer tracer particles, simultaneous measurement of local flow field particle velocimetry and particle tracking techniques can be achieved under laser beam illumination. For large solid particles, median filtering is used to reduce background noise, adjust image contrast, identify the center coordinates and radius, and calculate the particle velocity by measuring displacement changes within an extremely short time.

[0015] In this invention, the laser is configured to enable the image capture device to capture and photograph particles. The laser is positioned such that it can pass through the probe to expose the solid particles to light.

[0016] In this invention, the magnification of the telecentric lens is 2-10 times, for example, it can be 2 times, 3 times, 4 times, 5 times, 6 times, 7 times, 8 times, 9 times or 10 times, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0017] In this invention, the telecentric lens has a pixel count of 1 million, 2 million, or other megapixel telecentric lenses.

[0018] In this invention, the output and control system includes a computer and an xyz three-axis fine-tuning displacement platform, etc.

[0019] As a preferred technical solution of the present invention, the diameter of the probe is 3-5mm, for example, it can be 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm or 5mm, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0020] Preferably, the probe is equipped with a reflector.

[0021] As a preferred technical solution of the present invention, a silicone layer is provided on the surface of the reflector;

[0022] Preferably, the thickness of the silicone layer on the surface of the reflector is 0.5-1.5mm, for example, it can be 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm, 1mm, 1.05mm, 1.1mm, 1.15mm, 1.2mm, 1.25mm, 1.3mm, 1.35mm, 1.4mm, 1.45mm or 1.5mm, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0023] As a preferred technical solution of the present invention, the laser includes a single-cavity high-frequency short-pulse laser;

[0024] Preferably, the laser is equipped with a laser collimating beam expander and a laser sheet-mounted shaping lens.

[0025] As a preferred technical solution of the present invention, the shooting modes of the image capture device include single-frame shooting and continuous shooting.

[0026] In a second aspect, the present invention provides the use of the detection device as described in the first aspect, the use of which includes using the detection device to detect the motion state, packing state and microscopic parameters of solid particles in a reactor.

[0027] Specifically, the steps include the following:

[0028] (1) Fix the calibration plate, adjust the exposure time of the image capture device and the energy value of the laser to the corresponding preset values, and then adjust the calibration plate to be located at the focal plane through the output and control system, and control the image capture device to take pictures;

[0029] (2) Adjust the shooting mode of the image capture device to single frame shooting mode and adjust the exposure time and frame rate of the image capture device so that the maximum displacement of the particle reaches the standard value. Then adjust the pulse time and pulse period of the laser to synchronize the laser with the image capture device. Adjust the brightness so that the gray value of the obtained image reaches the preset value. Control the image capture device to shoot continuously. Process the images obtained by continuous shooting to obtain the motion state, accumulation state and micro parameters of the solid particles.

[0030] In this invention, the process of processing the obtained image can be as follows:

[0031] The image processing methods are as follows:

[0032] (1) First, the actual size of a single pixel in the image is determined by using a calibration board;

[0033] (2) Preprocess the obtained photos: image subtraction; image noise reduction (median filtering); image segmentation (threshold segmentation); image enhancement (grayscale transformation, histogram transformation);

[0034] (3) Select the area to be measured;

[0035] (4) Particle recognition: The digital mask method distinguishes the background and particles based on grayscale. The process includes obtaining the correlation coefficient map by calculating the cross-correlation coefficient, then performing binarization on the image, then identifying the position of the particles based on the pixels, calculating the size and center coordinates of the particles, the peak grayscale inside the particles, and the grayscale value of the particle center point.

[0036] (5) Velocity calculation: Each particle in the images of the same particle in two consecutive exposures is identified and located to determine its trajectory, and the velocity is calculated using a cross-correlation algorithm.

[0037] As a preferred technical solution of the present invention, the preset exposure time of the image capturing device in step (1) is 30-100μs, for example, it can be 30μs, 32μs, 34μs, 36μs, 38μs, 40μs, 42μs, 44μs, 46μs, 48μs, 50μs, 52μs, 54μs, 56μs, 58μs, 60μs, 62μs, 64μs, 66μs, 68μs, 70μs, 72μs, 74μs, 76μs, 78μs, 80μs, 82μs, 84μs, 86μs, 88μs, 90μs, 92μs, 94μs, 96μs, 98μs, or 100μs, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0038] Preferably, the preset energy value of the laser in step (1) is 1-3J, for example, it can be 1J, 1.1J, 1.2J, 1.3J, 1.4J, 1.5J, 1.6J, 1.7J, 1.8J, 1.9J, 2J, 2.1J, 2.2J, 2.3J, 2.4J, 2.5J, 2.6J, 2.7J, 2.8J, 2.9J or 3J, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0039] As a preferred technical solution of the present invention, the maximum displacement standard value of the particle in step (2) is 2-3 times the particle diameter, for example, it can be 2 times, 2.1 times, 2.2 times, 2.3 times, 2.4 times, 2.5 times, 2.6 times, 2.7 times, 2.8 times, 2.9 times or 3 times, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0040] Preferably, the pulse time of the laser in step (2) is 50-100μs, for example, it can be 50μs, 52μs, 54μs, 56μs, 58μs, 60μs, 62μs, 64μs, 66μs, 68μs, 70μs, 72μs, 74μs, 76μs, 78μs, 80μs, 82μs, 84μs, 86μs, 88μs, 90μs, 92μs, 94μs, 96μs, 98μs or 100μs, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0041] Preferably, the pulse period of the laser in step (2) is 1500-2500Hz, for example, it can be 1500Hz, 1550Hz, 1600Hz, 1650Hz, 1700Hz, 1750Hz, 1800Hz, 1850Hz, 1900Hz, 1950Hz, 2000Hz, 2050Hz, 2100Hz, 2150Hz, 2200Hz, 2250Hz, 2300Hz, 2350Hz, 2400Hz, 2450Hz or 2500Hz, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0042] As a preferred technical solution of the present invention, in step (2), a calibration plate is used to determine the size of a single pixel in the image during the processing of the continuously captured images;

[0043] Preferably, the processing of the continuously captured images in step (2) includes preprocessing;

[0044] Preferably, the preprocessing includes image subtraction, image noise reduction, image segmentation, and image enhancement performed sequentially;

[0045] Preferably, the microscopic parameters of the solid particles in step (2) include the velocity of the solid particles, the particle size of the solid particles, and the distribution state of the solid particles.

[0046] As a preferred technical solution of the present invention, the application includes using the detection device to detect the motion state, stacking state and microscopic parameters of solid particles in the reactor.

[0047] Specifically, the steps include the following:

[0048] (1) Fix the calibration plate, adjust the exposure time of the image capture device and the energy value of the laser to the corresponding preset values, and then adjust the calibration plate to be located at the focal plane through the output and control system, and control the image capture device to take pictures;

[0049] (2) Adjust the shooting mode of the image capture device to single-frame shooting mode and adjust the exposure time and frame rate of the image capture device so that the maximum displacement of the particle reaches the standard value. Then adjust the pulse time and pulse period of the laser to synchronize the laser with the image capture device. Adjust the brightness so that the gray value of the obtained image reaches the preset value. Control the image capture device to continuously shoot. Process the images obtained by continuous shooting to obtain the motion state, accumulation state and micro parameters of the solid particles.

[0050] The preset exposure time of the image capture device in step (1) is 30-100 μs; the preset energy of the laser is 1-3 J.

[0051] The maximum displacement standard value of the particle in step (2) is 2-3 times the particle diameter; the pulse time of the laser is 50-100μs; the pulse period of the laser is 1500-2500Hz; in the processing of the continuously captured images, a calibration plate is used to determine the size of a single pixel in the image; the processing of the continuously captured images includes preprocessing; the preprocessing includes image subtraction, image noise reduction, image segmentation and image enhancement performed sequentially; the microscopic parameters of the solid particles include the velocity of the solid particles, the particle diameter of the solid particles and the distribution state of the solid particles.

[0052] Compared with existing technical solutions, the present invention has the following beneficial effects:

[0053] (1) The detection device provided by the present invention solves the problem that the microscope can only be used to observe cross-flow filtration and dead-end filtration in the past through comprehensive design of the detection device; the invasive probe has a small diameter and causes less disturbance to the flow field;

[0054] (2) The measurement system was applied to the stirred built-in membrane reactor, which can observe micro particles at high speed; it can accurately and dynamically observe the deposition of micro particles (particle boundaries) on the membrane surface; and the micro parameters of the particles (velocity, particle size, distribution, solid content, etc.) can be obtained after post-processing. Attached Figure Description

[0055] Figure 1 This is a schematic diagram of the device for detecting the state of solid particles inside a reactor provided in Embodiment 1 of the present invention;

[0056] Figure 2 This is a schematic diagram of the probe used in Embodiment 1 of the present invention;

[0057] Figure 3 This is a photograph of the image obtained in Application Example 2 of the present invention;

[0058] Figure 4 This is a photograph of the particle motion diagram obtained in Example 3 of the present invention;

[0059] Figure 5 It is a photograph of the result image described in Example 3 of the present invention;

[0060] Figure 6 This is a photograph of the result image obtained in Example 4 of the present invention;

[0061] Figure 7 This is the velocity distribution diagram of the particles obtained in Application Example 4 of the present invention.

[0062] In the diagram: 1-reactor, 2-probe, 2.1-silicone layer, 2.2-planar intensifying lens, 3-telecentric lens, 4-image capture device, 5-synchronizer, 6-laser, 7-tubular membrane.

[0063] The present invention will now be described in further detail. However, the examples described below are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims. Detailed Implementation

[0064] To better illustrate the present invention and facilitate understanding of its technical solutions, typical but non-limiting embodiments of the present invention are as follows:

[0065] Example 1

[0066] This embodiment provides a device for detecting the state of solid particles inside a reactor, such as... Figure 1 As shown, the detection device includes: a probe 2, a telecentric lens 3, an image capture device 4 configured with the telecentric lens 3, a laser 6, a calibration plate, a synchronizer 5, and an output and control system, all installed inside the reactor 1.

[0067] The image capture device 4, synchronizer 5, and laser 6 are connected in sequence;

[0068] The output and control system is connected to the telecentric lens 3, the image capture device 4, the laser 6 and the synchronizer 5;

[0069] The probe 2 and the telecentric lens 3 are coaxially arranged;

[0070] The probe 2 has a diameter of 3-5mm, specifically 4mm in this embodiment; the probe 2 is equipped with a reflector; a silicone layer 2.1 is disposed on the surface of the reflector; the thickness of the silicone layer 2.1 disposed on the surface of the reflector is 0.5-1.5mm, specifically 1mm in this embodiment. Figure 2 As shown, probe 2 is equipped with a planar intensifying lens 2.2;

[0071] The laser 6 includes a single-cavity high-frequency short-pulse laser 6; the laser 6 is equipped with a laser collimating beam expander and a laser sheet-mounted shaping lens; the image capturing device 4 has shooting modes including single-frame shooting and continuous shooting.

[0072] In this embodiment, the calibration plate is used to determine the relationship between pixels and actual distances, and can be a measuring tool such as a ruler.

[0073] In this embodiment, in order to further observe the state of solid particles on the membrane surface during the reaction process, a matching tubular membrane 7 or other commonly used membranes in the art can be installed in the reactor 1.

[0074] In this embodiment, the output and control system includes a computer and an xyz three-axis fine-tuning displacement platform, etc.

[0075] Application Example 1

[0076] This application example provides a device for detecting the state of solid particles in the reactor as described in Example 1. The purpose of the device includes detecting the motion state, packing state and microscopic parameters of solid particles in the reactor.

[0077] Specifically, the steps include the following:

[0078] (1) Fix the calibration plate, adjust the exposure time of the image capture device and the energy value of the laser to the corresponding preset values, and then adjust the calibration plate to be located at the focal plane through the output and control system, and control the image capture device to take pictures;

[0079] (2) Adjust the shooting mode of the image capture device to single-frame shooting mode and adjust the exposure time and frame rate of the image capture device so that the maximum displacement of the particle reaches the standard value. Then adjust the pulse time and pulse period of the laser to synchronize the laser with the image capture device. Adjust the brightness so that the gray value of the obtained image reaches the preset value. Control the image capture device to continuously shoot. Process the images obtained by continuous shooting to obtain the motion state, accumulation state and micro parameters of the solid particles.

[0080] The preset exposure time of the image capture device in step (1) is 30-100 μs; the preset energy of the laser is 1-3 J.

[0081] The maximum displacement standard value of the particle in step (2) is 2-3 times the particle diameter; the pulse time of the laser is 50-100μs; the pulse period of the laser is 1500-2500Hz; in the processing of the continuously captured images, a calibration plate is used to determine the size of a single pixel in the image; the processing of the continuously captured images includes preprocessing; the preprocessing includes image subtraction, image noise reduction, image segmentation and image enhancement performed sequentially; the microscopic parameters of the solid particles include the velocity of the solid particles, the particle diameter of the solid particles and the distribution state of the solid particles.

[0082] Examples of specific reactor applications are as follows:

[0083] Application Example 2

[0084] The telecentric lens parameters are: magnification 10, working distance 100mm; high-speed camera (image capture device) parameters are: resolution 1 megapixel, frame rate 9500fps, exposure time 30μs; the laser energy preset value is 2J. The reactor is a stirred tank reactor. The solid particles used are spherical silica particles with a particle size of 50μm (2g / L) and 10μm silver-plated hollow glass microsphere tracer particles (0.1g / L). The titanium powder sintered film tube is the same as above. The laser source emits a beam with a diameter of approximately 2mm.

[0085] The maximum displacement standard value of the particles is set to 2.5 times the particle size; the pulse time of the laser is set to 70μs; and the pulse period of the laser is set to 2000Hz.

[0086] Using the above measurement method, median filtering was used to separate tracer particles and spherical silica particles in the original image, and large particles were removed by image subtraction. The velocity of the tracer particles, i.e., the velocity of the dispersed phase, was processed using PIVlab software; the velocity of the spherical silica particles, i.e., the velocity of both the dispersed and continuous phases, was processed using PTVlab. The resulting image is shown below. Figure 3 As shown in the figure, the velocity of the particles and the velocity of the flow field can be seen. By superimposing the fluid diagram and the particle diagram, the instantaneous flow field of the solid and liquid phases can be displayed more intuitively. Through analysis, the interaction relationship between the particles and the flow field can be seen.

[0087] Application Example 3

[0088] A 10x telecentric lens with the same parameters as above was used. High-speed camera (image capture device) parameters: same as above, frame rate 2000fps, exposure time 100μs; laser energy preset value 1J. The experiment was conducted in a flat-bottomed acrylic stirring tank with an inner diameter T = 240mm, and a stirring speed of 400r / min. The static liquid level height H = T, the stirring impeller was a downward-pressing six-bladed impeller with a diameter D = T / 3 and a height from the bottom C = T / 3. Four baffles were evenly distributed around the stirring tank, with a baffle width B = T / 10. A stainless steel tube with a probe and a reflector was used, made of silicone. The solid particles used were spherical silica particles with a diameter of approximately 50μm, 2g / L. A 30mm long tube was sintered with 10μm titanium powder.

[0089] The maximum displacement standard value of the particles is set to twice the particle diameter; the pulse time of the laser is set to 100μs; and the pulse period of the laser is set to 1500Hz.

[0090] Particles are deposited on the membrane surface by applying negative pressure to the system. A laser beam with a diameter of approximately 2 mm is emitted. Using the above method, a particle deposition process diagram is obtained, and the resulting particle motion diagram is shown below. Figure 4 The resulting image is as described above. Figure 5 As shown in the figure, the particle accumulation process can be observed. By statistically analyzing the particle accumulation area, the particle accumulation rate and the particle coverage of the membrane surface can be calculated.

[0091] Application Example 4

[0092] The telecentric lens parameters are: magnification 3, working distance 100mm; high-speed camera (image capture device) parameters are the same as above, frame rate 1000fps, exposure time 100μs. The reactor is a stirred tank. A square trough is added outside the stirred tank. The solid particles used are spherical silica with a particle size of approximately 50μm, 2g / L. The titanium powder sintered into the film tube is the same as above. The laser source emits light at a thickness of approximately 1mm.

[0093] The maximum displacement standard value of the particles is set to 3 times the particle diameter; the pulse time of the laser is set to 50μs; and the pulse period of the laser is set to 2500Hz.

[0094] Using the above measurement method, with sufficient laser energy, the velocity and solids content at any location within the stirred tank can be measured and analyzed. The particle velocity can be obtained through processing with PIVlab software. The solids content at this location is then calculated by statistically analyzing the particle size. The resulting image is shown below. Figure 6 As shown, the velocity distribution diagram of the obtained particles is as follows: Figure 7 As shown, Figure 6 The particle size statistics of the particles obtained are shown in Table 1. By calculating the solid content and particle velocity at different locations, the local solid content and velocity distribution in the reactor can be obtained.

[0095] Table 1

[0096] Particle size index Particle size (mm) Minimum particle size 0.0356 Maximum particle size 0.0452 Average particle size 0.0447

[0097] The present invention is described in detail through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions for the components used in the present invention, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0098] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0099] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0100] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A device for detecting the state of solid particles inside a reactor, characterized in that, The detection device includes: an invasive probe installed in the reactor, a telecentric lens, an image capture device configured with the telecentric lens, a laser, a calibration plate, a synchronizer, and an output and control system; The image capture device, synchronizer, and laser are connected in sequence; The output and control system is connected to the telecentric lens, image capture device, laser, and synchronizer; The invasive probe and telecentric lens are coaxially arranged, while the invasive probe and laser are not coaxially arranged. A reflector is provided at the front end of the invasive probe, and a silicone layer is provided on the surface of the reflector. The laser includes a single-cavity high-frequency short-pulse laser. The diameter of the invasive probe is 3-5 mm. The particles are excited by the reflected light from the laser beam irradiating the reflector and thus imaged by the image capture device.

2. The detection device as described in claim 1, characterized in that, The thickness of the silicone layer on the surface of the reflector is 0.5-1.5 mm.

3. The detection device as described in claim 1, characterized in that, The laser is equipped with a laser collimating beam expander and a laser sheet-mounted shaping lens.

4. The detection device as described in claim 1, characterized in that, The image capture device has two shooting modes: single-frame shooting and continuous shooting.

5. The use of a detection device as described in any one of claims 1-4, characterized in that, The applications include using the detection device to detect the motion state, packing state, and microscopic parameters of solid particles within the reactor. Specifically, the steps include the following: (1) Fix the calibration plate, adjust the exposure time of the image capture device and the energy value of the laser to the corresponding preset values, and then adjust the calibration plate to be located at the focal plane through the output and control system, and control the image capture device to take pictures; (2) Adjust the shooting mode of the image capture device to single frame shooting mode and adjust the exposure time and frame rate of the image capture device so that the maximum displacement of the particles reaches the standard value. Then adjust the pulse time and pulse period of the laser to synchronize the laser with the image capture device. Adjust the brightness so that the gray value of the obtained image reaches the preset value. Control the image capture device to shoot continuously. Process the images obtained by continuous shooting to obtain the motion state, accumulation state and micro parameters of the solid particles.

6. The use as described in claim 5, characterized in that, The preset exposure time of the image capture device in step (1) is 30-100μs.

7. The use as described in claim 5, characterized in that, The preset energy value of the laser in step (1) is 1-3J.

8. The use as described in claim 5, characterized in that, The maximum displacement standard value of the particles in step (2) is 2-3 times the particle diameter.

9. The use as described in claim 5, characterized in that, The pulse duration of the laser in step (2) is 50-100 μs.

10. The use as described in claim 5, characterized in that, The pulse period of the laser in step (2) is 1500-2500Hz.

11. The use as described in claim 5, characterized in that, In step (2), a calibration board is used to determine the size of a single pixel in the image during the processing of the continuously captured images.

12. The use as described in claim 5, characterized in that, Step (2) involves processing the images obtained from continuous shooting, including preprocessing.

13. The use as described in claim 12, characterized in that, The preprocessing includes image subtraction, image noise reduction, image segmentation, and image enhancement performed sequentially.

14. The use as described in claim 5, characterized in that, The microscopic parameters of the solid particles in step (2) include the velocity of the solid particles, the particle size of the solid particles, and the distribution state of the solid particles.

15. The use as described in claim 5, characterized in that, The applications include using the detection device to detect the motion state, packing state, and microscopic parameters of solid particles within the reactor. Specifically, the steps include the following: (1) Fix the calibration plate, adjust the exposure time of the image capture device and the energy value of the laser to the corresponding preset values, and then adjust the calibration plate to be located at the focal plane through the output and control system, and control the image capture device to take pictures; (2) Adjust the shooting mode of the image capture device to single frame shooting mode and adjust the exposure time and frame rate of the image capture device so that the maximum displacement of the particle reaches the standard value. Then adjust the pulse time and pulse period of the laser to synchronize the laser with the image capture device. Adjust the brightness so that the gray value of the obtained image reaches the preset value. Control the image capture device to shoot continuously. Process the images obtained by continuous shooting to obtain the motion state, accumulation state and micro parameters of the solid particles. The preset exposure time of the image capture device in step (1) is 30-100 μs; the preset energy of the laser is 1-3 J. The maximum displacement standard value of the particle in step (2) is 2-3 times the particle diameter; the pulse time of the laser is 50-100μs; the pulse period of the laser is 1500-2500Hz; in the processing of the continuously captured images, a calibration plate is used to determine the size of a single pixel in the image; the processing of the continuously captured images includes preprocessing; the preprocessing includes image subtraction, image noise reduction, image segmentation and image enhancement performed sequentially; the microscopic parameters of the solid particles include the velocity of the solid particles, the particle diameter of the solid particles and the distribution state of the solid particles.

Images