Dual optical path multi-dispersion mode dynamic image particle size and shape analyzer

Abstract

The application provides a double-light-path multi-dispersion-mode dynamic image particle size and shape analyzer, which comprises an upper bottom plate and a channel support arranged on the upper bottom plate, dustproof glass is arranged on both sides of the channel support, and a dispersion channel is further arranged in the channel support; the dispersion channel comprises a free-fall dispersion channel, a wet dispersion channel and a compressed gas dispersion channel; a parallel light source is arranged on one side of the channel support on the top of the upper bottom plate, and a ZOOM camera and a BASE camera are arranged on the other side; the BASE camera is connected with a small-magnification double-telecentric lens, and the ZOOM camera is connected with a large-magnification double-telecentric lens. The double-light-path multi-dispersion-mode dynamic image particle size and shape analyzer is designed, optical systems adopt two groups of high-speed cameras equipped with different magnification lenses, namely, a ZOOM camera and a BASE camera; the large-magnification double-telecentric lens and the ZOOM camera are matched to measure small particles, the small-magnification double-telecentric lens and the BASE camera are matched to measure large particles, and the measurement range of particle size is widened.

Description

Technical Field

[0001] This utility model relates to the field of particle size and shape analysis technology, and more specifically, to a dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer. Background Technology

[0002] Particle size and shape are fundamental indicators reflecting particle characteristics, determining their physical, chemical, and mechanical properties. To control product quality, particle size and shape parameters need to be measured during the production process. Currently, most commonly used image-based measuring instruments are single-path systems with fixed magnification, making it difficult to accurately measure both small and large particles. Furthermore, for fine powder samples and liquid samples that cannot be uniformly dispersed during free fall, a single free fall dispersion mode is insufficient. Therefore, we have made improvements and proposed a dual-path, multi-dispersion mode dynamic image particle size and shape analyzer. Utility Model Content

[0003] This utility model provides a dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer, including an upper base plate and a channel support mounted on the upper base plate. The channel support is provided with a replaceable sample dispersion channel. A ZOOM camera and a BASE camera are located on the top of the upper base plate, on one side of the replaceable sample dispersion channel. The BASE camera is connected to a low-magnification dual telecentric lens, and a second reflector is provided on the side of the low-magnification dual telecentric lens away from the BASE camera. The ZOOM camera is connected to a high-magnification dual telecentric lens, and a second beam splitter is provided on the side of the high-magnification dual telecentric lens away from the ZOOM camera. A first parallel light source and a second parallel light source are provided on the other side of the replaceable sample dispersion channel. A first reflector is provided on one side of the first parallel light source, and a first beam splitter is provided on one side of the second parallel light source.

[0004] As a preferred technical solution of this application, a narrow-band filter is provided between the second reflector and the second beam splitter.

[0005] As a preferred technical solution of this application, a camera mounting bracket is provided on the upper base plate by bolts, and two camera bases are installed in the camera mounting bracket by bolts. The ZOOM camera and the BASE camera are respectively fixed to the two camera bases by bolts. The upper base plate is provided with guide grooves for mounting the camera mount with bolts. The camera mount can be moved back and forth along the guide grooves to adjust the focus. The inner side of the camera mount is also provided with guide grooves for bolts to pass through. Moving the camera base up and down along the guide grooves on the inner side of the camera mount can adjust the field of view of the ZOOM camera and the BASE camera.

[0006] As a preferred technical solution of this application, the channel support is provided with a dispersion channel positioning hole, and the replaceable sample dispersion channel is provided with a dispersion channel positioning pin. The dispersion channel positioning pin is inserted into the dispersion channel positioning hole to realize the positioning of the replaceable sample dispersion channel.

[0007] As a preferred technical solution of this application, the channel bracket is provided with a sample outlet socket, and mounting holes are provided on both sides of the channel bracket. A dustproof glass bracket is installed in the mounting holes, and a dustproof glass is installed in the dustproof glass bracket. A plastic pressure ring and a retaining ring for fixing the dustproof glass are also installed in the dustproof glass bracket.

[0008] As a preferred technical solution of this application, the replaceable sample dispersion channel includes a dry free-fall dispersion channel installed in a channel support. The dry free-fall dispersion channel includes a feeding channel, with focusing and holding glass installed on both sides of the feeding channel, and a feeding port provided at the top of the feeding channel.

[0009] As a preferred technical solution of this application, the feeding channel is provided with a gap for installing the focusing and holding glass. The focusing and holding glass is inserted into the gap of the feeding channel from bottom to top, and the feeding channel is also provided with a focusing and holding glass baffle for fixing the focusing and holding glass.

[0010] As a preferred technical solution of this application, a guide groove is provided on the inner side of the dry free fall dispersion channel, and the feeding channel is inserted into the dry free fall dispersion channel along the guide groove on the inner side of the dry free fall dispersion channel.

[0011] As a preferred technical solution of this application, a feeding device is provided on the top of the base plate. The feeding device includes a funnel lifting device provided on the top of the upper base plate, and a funnel is connected to the funnel lifting device. The feeding device also includes a vibrating feeder bracket provided on the top of the upper base plate. A shock-absorbing pad is provided on the top of the vibrating feeder bracket. A feeder counterweight is installed on the top of the shock-absorbing pad. A linear vibrating feeder is connected to the feeder counterweight. A replaceable feeding trough is installed on the top of the linear vibrating feeder. As a preferred technical solution of this application, the replaceable sample dispersion channel includes a wet dispersion channel installed in a channel support. The wet dispersion channel has an inlet, a sample testing window and an outlet. The sample enters from the inlet, passes through the sample testing window and flows out from the outlet. As a preferred technical solution of this application, the replaceable sample dispersion channel includes a compressed gas dispersion channel installed in a channel support. The compressed gas dispersion channel also has an inlet, a sample testing window, and an outlet. The sample enters from the inlet, passes through the sample testing window, and is ejected from the outlet.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: In the scheme of this application: 1. This utility model designs a dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer. The optical system uses two sets of high-speed cameras equipped with lenses of different magnification, namely a ZOOM camera and a BASE camera. The high-magnification dual telecentric lens and the ZOOM camera are used together to photograph small particles, while the low-magnification dual telecentric lens and the BASE camera are used together to photograph large particles, which broadens the measurement range of particle size and improves the accuracy of particle shape parameters. 2. This application features a replaceable sample dispersion channel. When measuring large particles or easily dispersed samples, a dry free-fall dispersion channel can be used; when measuring fine particles that are prone to agglomeration, a compressed gas dispersion channel can be used to disperse the particles using a high-speed airflow; when measuring liquid samples, a wet dispersion channel can be used to disperse the sample into the liquid (usually water), and the sample is uniformly dispersed by ultrasonic stirring before measurement, avoiding measurement deviations caused by sample agglomeration. Attached Figure Description

[0013] Figure 1 A cross-sectional schematic diagram of the dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer provided in this application; Figure 2 A top view schematic diagram of the dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer provided in this application; Figure 3 This is a schematic diagram of the channel support structure provided in this application; Figure 4 This is a schematic diagram of the dustproof glass support structure provided in this application; Figure 5 A schematic diagram of the dry free-fall dispersion channel and channel support structure provided in this application; Figure 6 A schematic diagram of the material feeding channel and free fall dispersion channel provided in this application; Figure 7 A schematic diagram of the feeding channel and focusing glass provided in this application; Figure 8 Schematic diagrams of two different spacing feeding channel structures provided in this application; Figure 9 A schematic diagram of the dry free-fall dispersion channel and calibration plate structure provided in this application; Figure 10 This is a schematic diagram of the calibration plate installation structure provided in this application; Figure 11 This is a schematic diagram of the structure of the wet dispersion channel and channel support provided in this application; Figure 12 A cross-sectional structural schematic diagram of the wet dispersion channel provided in this application; Figure 13 This is a schematic diagram of the structure of the compressed gas dispersion channel and channel support provided in this application; Figure 14 A cross-sectional structural schematic diagram of the compressed gas dispersion channel provided in this application; Figure 15 This is a schematic diagram of the camera mounting bracket structure provided in this application; Figure 16 The dual-path optical path diagram provided in this application; Figure 17 Another dual-path optical path diagram provided in this application; Figure 18 This application provides yet another dual-path optical path diagram.

[0014] Figure label: 1. Funnel; 2. Funnel lifting device; 3. Linear vibrating feeder; 4. Feeder counterweight; 5. Shock-absorbing pad; 6. Vibrating feeder bracket; 7. Upper base plate; 8. Lower base plate; 9. Power switch; 10. Replaceable feeding trough; 11. Discharge channel; 12. Focusing and holding glass; 13. Dustproof glass; 14. Sample recovery box; 15. Control circuit board; 16. First parallel light source; 17. Second parallel light source; 18. First reflector; 19. First beam splitter; 20. Camera mounting bracket; 21. Second beam splitter; 22. Narrow-band filter; 23. Second reflector; 24. 25. High-magnification dual telecentric lens; 26. ZOOM camera; 27. Low-magnification dual telecentric lens; 28. BASE camera; 29. ​​Dry free-fall dispersion channel; 30. Wet dispersion channel; 31. Compressed gas dispersion channel; 32. Channel support; 33. Sample outlet socket; 34. Positioning hole; 35. Positioning pin; 36. Dustproof glass support; 37. Plastic retaining ring; 38. Snap ring retaining ring; 39. Focusing glass baffle; 40. Feed port; 41. Sample inlet; 42. Sample outlet; 43. Sample testing window; 44. Calibration plate; 45. Camera base; 46. Lens support bracket. Detailed Implementation

[0015] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0016] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0017] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0018] Example 1, please refer to Figure 1 A dual-path multi-dispersion mode dynamic image particle size and shape analyzer includes an upper base plate 7 and a channel support 31 disposed on the upper base plate 7. The channel support 31 is provided with a replaceable sample dispersion channel. A ZOOM camera 25 and a BASE camera 27 are disposed on the top of the upper base plate 7 and located on one side of the channel support 31. The BASE camera 27 is connected to a low-magnification dual telecentric lens 26, and a second reflector 23 is disposed on the side of the low-magnification dual telecentric lens 26 away from the BASE camera 27. The ZOOM camera 25 is connected to a high-magnification dual telecentric lens 24, and a second beam splitter 21 is disposed on the side of the high-magnification dual telecentric lens 24 away from the ZOOM camera 25. A first parallel light source 16 and a second parallel light source 17 are disposed on the other side of the replaceable sample dispersion channel. A first reflector 18 is disposed on one side of the first parallel light source 16, and a first beam splitter 19 is disposed on one side of the second parallel light source 17.

[0019] Reference Figure 15 A camera mounting bracket 20 is installed on the upper base plate 7 by bolts. Two camera bases 44 are installed in the camera mounting bracket 20 by bolts. The ZOOM camera 25 and the BASE camera 27 are respectively fixed to the two camera bases 44 by bolts. The upper base plate 7 is provided with a guide groove for mounting the camera mount 20 with bolts. The camera mount 20 can be moved back and forth along the guide groove to adjust the focus. The inner side of the camera mount 20 is also provided with a guide groove for the bolts to pass through. The camera base 44 can be moved up and down along the guide groove on the inner side of the camera mount 20 to adjust the field of view of the ZOOM camera 25 and the BASE camera 27.

[0020] Two lens support brackets 45 are bolted to the upper base plate 7. The two lens support brackets 45 are respectively connected to the high-magnification double telecentric lens 24 and the low-magnification double telecentric lens 26.

[0021] The channel bracket 31 is provided with a sample outlet socket 32. Both sides of the channel bracket 31 are provided with mounting holes. A dustproof glass bracket 35 is installed in the mounting holes. A dustproof glass 13 is installed in the dustproof glass bracket 35. A plastic pressure ring 36 and a retaining ring 37 for fixing the dustproof glass 13 are also installed in the dustproof glass bracket 35.

[0022] The channel support 31 is provided with a dispersion channel positioning hole 33, and the replaceable sample dispersion channel is provided with a dispersion channel positioning pin 34. The dispersion channel positioning pin 34 is inserted into the dispersion channel positioning hole 33 to realize the positioning of the replaceable sample dispersion channel.

[0023] During use, as particles pass through the measurement area, the high-magnification dual telecentric lens 24 and ZOOM camera 25, and the low-magnification dual telecentric lens 26 and BASE camera 27 simultaneously capture images of the falling particles. The BASE camera 27 and ZOOM camera 25 are installed at different heights, with the field of view of ZOOM camera 25 above that of BASE camera 27. The fields of view of ZOOM camera 25 and BASE camera 27 are separate. Based on the defined particle size threshold, the high-magnification dual telecentric lens 24 and ZOOM camera 25 capture and retain images of small-diameter particles, while the low-magnification dual telecentric lens 26 and BASE camera 27 capture and retain images of large-diameter particles. Finally, the host computer software statistically analyzes the particle images captured by ZOOM camera 25 and BASE camera 27 and provides a summary measurement result.

[0024] The dual-optical-path, dual-camera collaborative working mode significantly expands the instrument's measurement range, enabling it to simultaneously cover the measurement needs of both small and large-diameter particles. This solves the problem of traditional single-optical-path instruments requiring frequent lens changes or parameter adjustments when measuring particles of different sizes, greatly improving measurement efficiency. Furthermore, by specifically matching the lens magnification with the particle size, particles of different sizes can be clearly visualized in the image, reducing measurement errors caused by lens magnification mismatch and improving the accuracy of particle size and shape analysis. In addition, the separate field of view avoids mutual interference between particles of different sizes during imaging.

[0025] Furthermore, such as Figure 1 As shown, a narrowband filter 22 is disposed between the second reflector 23 and the second beam splitter 21. The introduction of the narrowband filter 22 can accurately select light of specific wavelengths, effectively filter ambient light, stray light and interference bands in the light source, and greatly improve the signal-to-noise ratio of the image. This significantly enhances the contrast between the particles and the background, makes the particle edge contours sharper, provides high-quality raw data for subsequent image recognition algorithms, and reduces the problems of misjudgment and missed judgment of particles caused by image blur or noise.

[0026] Example 2 further optimizes the dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer provided in Example 1, such as... Figures 2-10As shown, the replaceable sample dispersion channel includes a dry free-fall dispersion channel 28 installed in the channel support 31. The dry free-fall dispersion channel 28 further includes a feeding channel 11, specifically providing feeding channels 11 with two spacings of 5 mm and 10 mm to adapt to the falling and dispersion requirements of particles of different sizes. Focusing and holding glass 12 is installed on both sides of the feeding channel 11.

[0027] The top of the feeding channel 11 is provided with a feeding port 39.

[0028] The feeding channel 11 is provided with a gap for installing the focusing and holding glass 12. The focusing and holding glass 12 is inserted into the gap of the feeding channel 11 from bottom to top, and the feeding channel 11 is also provided with a focusing and holding glass baffle 38 for fixing the focusing and holding glass 12.

[0029] A guide groove is provided on the inner side of the dry free fall dispersion channel 28, and the feeding channel 11 is inserted into the dry free fall dispersion channel 28 along the guide groove on the inner side of the dry free fall dispersion channel 28.

[0030] The positioning pin 34 is set on the dry free fall dispersion channel 28, which is placed from the upper left corner to the lower right corner. The positioning pin 34 is inserted into the positioning hole 33, and the dry free fall dispersion channel 28 is accurately positioned through the three-point positioning.

[0031] It also includes a calibration plate 43, which is placed in the guide groove inside the dry free fall dispersion channel 28 when adjusting the optical path, and is removed to install the feeding channel 11 when in use.

[0032] Furthermore, a feeding device is provided on the top of the upper base plate 7. The feeding device includes a funnel lifting device 2 located on the top of the upper base plate 7, and a funnel 1 is connected to the funnel lifting device 2. The funnel lifting device 2 can adapt to samples of different sizes by adjusting the height of the funnel 1, so that the samples can fall quickly from the funnel 1 into the replaceable feeding trough 10.

[0033] Furthermore, such as Figure 2As shown, the feeding device also includes a vibratory feeder bracket 6 set on the top of the upper base plate 7. A shock-absorbing pad 5 is set on the top of the vibratory feeder bracket 6, and a feeder counterweight 4 is installed on the top of the shock-absorbing pad 5. A linear vibratory feeder 3 is connected to the feeder counterweight 4. A replaceable feeding trough 10 is installed on the top of the linear vibratory feeder 3, and a distance is left between the replaceable feeding trough 10 and the funnel 1. The linear vibratory feeder 3 can achieve uniform and continuous conveying and dispersion of particles by adjusting the frequency and amplitude, avoiding the "arching" or "interruption" of particles in the traditional gravity feeding method, and ensuring the stability of particle distribution in the measurement area. The shock-absorbing pad 5 effectively isolates the vibration source from the influence of other parts of the instrument, prevents imaging blurring or component loosening caused by resonance, and improves the stability of the system. The feeder counterweight 4 enhances the inertia of the vibration system, makes the vibration frequency more stable, and further optimizes the uniformity of feeding. During measurement, the sample is first poured into funnel 1. The funnel 1 is then slowly raised using the funnel lifting device 2, allowing the particles to be measured to enter the replaceable feeding trough 10. The frequency and amplitude of the linear vibrating feeder 3 are then adjusted to allow the particles to fall into the feeding channel 11. After passing through the feeding channel composed of two focusing and holding glass pieces 12, the particles finally fall into the sample recovery box 14, used to collect the measured particle samples for subsequent processing or reuse. The falling speed of the particles is adjusted so that when the particles fall into the feeding channel, the total projected area of ​​the particles in the image captured by the camera occupies approximately 1% of the image area. Below the replaceable sample feeding channel, there is also a sample recovery box 14, located at the end of the sample feeding channel. like Figure 8 The diagram shows two different spacing feeding channels 11. Small-diameter particles use a 5mm spacing feeding channel 11, while medium-diameter particles use a 10mm spacing feeding channel 11. The focusing and holding glass 12 is set to prevent particles from splashing during their fall, keeping the falling particles within the lens's depth of field and improving the clarity of the captured particle images. The dedicated feeding channels 11 designed for different particle sizes achieve precise control of the particle's movement trajectory. The small-pitch feeding channel 11 can constrain the lateral diffusion of small-diameter particles, while the large-pitch feeding channel 11 provides ample movement space for medium-diameter particles, avoiding frequent collisions between particles and the channel walls and ensuring that they pass through the measurement area in a stable posture.

[0034] Example 3 further optimizes the dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer provided in Example 1, such as... Figures 11-12 As shown, the replaceable sample dispersion channel includes a wet dispersion channel 29 installed in the channel bracket 31. A positioning pin 34 is set on the wet dispersion channel 29. The wet dispersion channel 29 is placed from the upper left corner to the lower right corner. The positioning pin 34 is inserted into the positioning hole 33. The wet dispersion channel 29 is accurately positioned through the three-point positioning. An external wet ultrasonic disperser is used to uniformly disperse particulate samples into a liquid medium, and the dispersed sample is transported to the wet dispersion channel 29 through a circulation conveying system. The wet dispersion channel 29 has an inlet 40, a sample testing window 42, and an outlet 41. The sample enters from the inlet 40, passes through the sample testing window 42, and flows out from the outlet 41. During this process, dual cameras with dual lenses simultaneously take pictures from the sample testing window 42 to acquire particle images. The flow rate of the tested particles is adjusted so that when the particles flow through the channel, the total projected area of ​​the particles in the image captured by the camera occupies approximately 1% of the image area. The external wet ultrasonic disperser can effectively break up particle agglomeration through high-frequency vibration, achieving uniform dispersion and avoiding particle size misjudgment caused by agglomerates in dry measurement; the circulating conveying system ensures that the sample continuously flows through the measurement channel, realizing continuous dynamic measurement and improving sample representativeness.

[0035] Example 4 further optimizes the dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer provided in Example 1, such as... Figures 13-14 As shown, the replaceable sample dispersion channel includes a compressed gas dispersion channel 30 installed in the channel bracket 31. A positioning pin 34 is set on the compressed gas dispersion channel 30. The compressed gas dispersion channel 30 is placed from the upper left corner to the lower right corner. The positioning pin 34 is inserted into the positioning hole 33. The compressed gas dispersion channel 30 is accurately positioned through the three-point positioning function.

[0036] An external compressed gas disperser is used to generate a high-speed airflow to blow the particle sample into the compressed gas dispersion channel 30 to achieve particle dispersion. The compressed gas dispersion channel 30 has an inlet 40, a sample testing window 42, and an outlet 41. The sample enters from the inlet 40, passes through the sample testing window 42, and is ejected from the outlet 41. During this process, dual cameras with dual lenses simultaneously take pictures from the sample testing window 42 to acquire particle images. The blowing speed of the tested particles is adjusted so that when the particles are blown through the channel, the total projected area of ​​the particles in the image captured by the camera occupies approximately 1% of the image area. Forced dispersion of particles is achieved through high-speed airflow, which is especially suitable for particles with high density, poor flowability or easy adhesion, and can effectively prevent particles from depositing or agglomerating in the channel.

[0037] Furthermore, a lower base plate 8 is provided at the bottom of the upper base plate 7, and a power switch 9 is installed on the lower base plate 8.

[0038] Furthermore, a control circuit board 15 is also installed on the upper base plate 7, and the power switch 9 is connected to the control circuit board 15. The first parallel light source 16, the second parallel light source 17, the ZOOM camera 25, and the BASE camera 27 are all connected to the control circuit board 15.

[0039] This application provides multiple shooting optical paths, as detailed below: Shooting light path Figure 16 As shown, Figure 16 In the diagram, point A is marked as the field of view of the BASE camera 27, point B is marked as the field of view of the ZOOM camera 25, and point C is marked as the magnified field of view of the ZOOM camera 25. The first parallel light source 16 is red light, and the second parallel light source 17 is green light. At this time, the narrowband filter 22 is a narrowband pass filter, which can only allow short-wavelength green light to pass through, thereby reducing the diffraction effect when small particles are irradiated by light and improving the clarity of the acquired particle image.

[0040] Shooting light path Figure 17 As shown, Figure 17 In the diagram, point A represents the field of view of the BASE camera 27, point B represents the field of view of the ZOOM camera 25, and point C represents the magnified field of view of the ZOOM camera 25. At this time, both the first parallel light source 16 and the second parallel light source 17 emit white light. The first beam splitter 19 and the second beam splitter 21 use perforated mirrors. The design of the perforated mirrors optimizes the optical path structure of the measurement, enabling the light to efficiently illuminate the particles being measured, while reducing light loss caused by reflection and improving the imaging contrast.

[0041] Shooting light path Figure 18 As shown, Figure 18 In the image, point A is marked as the field of view of the BASE camera 27, point B is marked as the field of view of the ZOOM camera 25, and point C is marked as the magnified field of view of the ZOOM camera 25. At this time, both the first parallel light source 16 and the second parallel light source 17 are white light. The first beam splitter 19 and the second beam splitter 21 are mirrors with anti-reflection coatings. The anti-reflection coating of the mirrors significantly reduces the reflection loss of light and improves the light transmittance, so that high-speed moving particles can still maintain a clear outline in the image.

[0042] Due to the different camera installation heights, the field of view of the ZOOM camera 25 is above that of the BASE camera 27, and the fields of view of the ZOOM camera 25 and the BASE camera 27 are separate. According to the defined particle size threshold, the high-magnification dual telecentric lens 24 and the ZOOM camera 25 capture and retain images of small-sized particles, while the low-magnification dual telecentric lens 26 and the BASE camera 27 capture and retain images of large-sized particles. Finally, the host computer software statistically analyzes the particle images captured by the ZOOM camera 25 and the BASE camera 27 and provides a summary measurement result.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer, characterized in that, The system includes an upper base plate (7) and a channel support (31) mounted on the upper base plate (7). The channel support (31) contains a replaceable sample dispersion channel. The top of the upper base plate (7) is equipped with a ZOOM camera (25) and a BASE camera (27) located on one side of the channel support (31). The BASE camera (27) is connected to a low-magnification dual telecentric lens (26), and a second reflector (23) is provided on the side of the low-magnification dual telecentric lens (26) away from the BASE camera (27). The ZOOM camera (25) is connected to a high-magnification dual telecentric lens (24), and a second beam splitter (21) is provided on the side of the high-magnification dual telecentric lens (24) away from the ZOOM camera (25). A first parallel light source (16) and a second parallel light source (17) are provided on the other side of the channel support. A first reflector (18) is provided on one side of the first parallel light source (16), and a first beam splitter (19) is provided on one side of the second parallel light source (17).

2. The dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer according to claim 1, characterized in that, A narrow-band filter (22) is provided between the second reflector (23) and the second beam splitter (21).

3. The dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer according to claim 1, characterized in that, A camera mounting bracket (20) is provided on the upper base plate (7) by bolts. Two camera bases (44) are installed in the camera mounting bracket (20) by bolts. The ZOOM camera (25) and BASE camera (27) are respectively fixed to the two camera bases (44) by bolts. The upper base plate (7) is provided with a guide groove for mounting the camera mounting bracket (20) with bolts. The camera mounting bracket (20) can be moved back and forth along the guide groove to adjust the focus. The inner side of the camera mounting bracket (20) is also provided with a guide groove for the bolts to pass through. The camera base (44) can be moved up and down along the guide groove on the inner side of the camera mounting bracket (20) to adjust the field of view of the ZOOM camera (25) and the BASE camera (27).

4. The dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer according to claim 1, characterized in that, The channel support (31) is provided with a dispersion channel positioning hole (33), and the replaceable sample dispersion channel is provided with a dispersion channel positioning pin (34). The dispersion channel positioning pin (34) is inserted into the dispersion channel positioning hole (33) to realize the positioning of the replaceable sample dispersion channel.

5. The dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer according to claim 1, characterized in that, The channel bracket (31) is provided with a sample outlet socket (32). Both sides of the channel bracket (31) are provided with mounting holes. A dustproof glass bracket (35) is installed in the mounting holes. A dustproof glass (13) is installed in the dustproof glass bracket (35). A plastic pressure ring (36) and a retaining ring (37) for fixing the dustproof glass (13) are also installed in the dustproof glass bracket (35).

6. The dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer according to any one of claims 1-5, characterized in that, The replaceable sample dispersion channel includes a dry free fall dispersion channel (28) installed in the channel support (31). The dry free fall dispersion channel (28) includes a feeding channel (11). Focusing and holding glass (12) is installed on both sides of the feeding channel (11). A feeding port (39) is provided at the top of the feeding channel (11).

7. The dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer according to claim 6, characterized in that, The feeding channel (11) is provided with a gap for installing the focusing and holding glass (12). The focusing and holding glass (12) is inserted into the gap of the feeding channel (11) from bottom to top. The feeding channel (11) is also provided with a focusing and holding glass baffle (38) for fixing the focusing and holding glass (12).

8. The dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer according to claim 6, characterized in that, The dry free fall dispersion channel (28) is provided with a guide groove on the inner side, and the feeding channel (11) is inserted into the dry free fall dispersion channel (28) along the guide groove on the inner side of the dry free fall dispersion channel (28).

9. The dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer according to claim 6, characterized in that, The top of the upper base plate (7) is provided with a feeding device, which includes a funnel lifting device (2) provided on the top of the upper base plate (7), and a funnel (1) is connected to the funnel lifting device (2); the feeding device also includes a vibrating feeder bracket (6) provided on the top of the upper base plate (7), a shock-absorbing pad (5) provided on the top of the vibrating feeder bracket (6), a feeder counterweight (4) installed on the top of the shock-absorbing pad (5), and a linear vibrating feeder (3) connected to the feeder counterweight (4), and a replaceable feeding trough (10) installed on the top of the linear vibrating feeder (3).

10. The dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer according to any one of claims 1-5, characterized in that, The replaceable sample dispersion channel includes a wet dispersion channel (29) installed in a channel support (31). The wet dispersion channel (29) has an inlet (40), a sample testing window (42), and an outlet (41). The sample enters from the inlet (40), passes through the sample testing window (42), and flows out from the outlet (41).

11. The dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer according to any one of claims 1-5, characterized in that, The replaceable sample dispersion channel includes a compressed gas dispersion channel (30) installed in a channel bracket (31). The compressed gas dispersion channel (30) also has an inlet (40), a sample testing window (42), and an outlet (41). The sample enters from the inlet (40), passes through the sample testing window (42), and is ejected from the outlet (41).

12. The dual-optical-path multi-dispersion mode dynamic image particle size and shape analyzer according to claim 1, characterized in that, The dual-optical-path dual-camera collaborative working mode is adopted. The field of view of the ZOOM camera (25) is above the field of view of the BASE camera (27). The fields of view of the ZOOM camera (25) and the BASE camera (27) are separate, avoiding mutual interference between particles of different sizes during imaging. The high-magnification dual telecentric lens (24) and the ZOOM camera (25) capture and retain images of small-diameter particles, while the low-magnification dual telecentric lens (26) and the BASE camera (27) capture and retain images of large-diameter particles. Therefore, it can simultaneously cover the measurement needs of both small-diameter and large-diameter particles. Finally, the host computer software statistically analyzes the particle images captured by the ZOOM camera (25) and the BASE camera (27) according to the defined particle size thresholds and provides a summary measurement result.

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