Dual-optical-path dynamic image granularity and particle shape analyzer

Abstract

The invention provides a dual-optical-path dynamic image granularity and particle shape analyzer which comprises a dynamic image acquisition device, the dynamic image acquisition device comprises an upper bottom plate, a channel support is arranged at the top of the upper bottom plate, dustproof glass is arranged on the two sides of the channel support, a dispersing channel is further arranged in the channel support, a discharging channel is arranged in the dispersing channel, and the discharging channel is communicated with the channel. A feeding channel is formed in the upper bottom plate, focusing maintaining glass is arranged on the two sides of the feeding channel, a flat light source and a camera installation frame are installed on the top of the upper bottom plate, the camera installation frame and the flat light source are located on the two sides of the channel support respectively, a ZOOM camera and a BASE camera are arranged on the camera installation frame, the ZOOM camera is connected with a large-magnification double-telecentric lens, and the BASE camera is connected with a small-magnification lens. According to the invention, the high-speed camera, the large-magnification double-telecentric lens and the ZOOM camera which are provided with two groups of lenses with different magnifications are matched with each other to shoot small particles, and the small-magnification lens and the BASE camera are matched with each other to shoot large particles, so that the measurement range of the particle size of the particles is widened.

Description

Technical Field

[0001] This invention relates to the field of particle size and shape analysis technology, and more specifically, to a dual-optical-path 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 production. 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-diameter particles. Therefore, we propose an improvement: a dual-path dynamic image particle size and shape analyzer. Summary of the Invention

[0003] This invention provides a dual-optical-path dynamic image particle size and shape analyzer, including a dynamic image acquisition device. The dynamic image acquisition device includes an upper base plate, a channel support is provided on the top of the upper base plate, and dustproof glass is provided on both sides of the channel support. A dispersion channel is also provided in the channel support, and a feeding channel is provided in the dispersion channel. Focusing and holding glass is provided on both sides of the feeding channel. A flat panel light source and a camera mounting bracket are installed on the top of the upper base plate. The camera mounting bracket and the flat panel light source are respectively located on both sides of the channel support. A ZOOM camera and a BASE camera are installed on the camera mounting bracket. The ZOOM camera is connected to a high-magnification dual telecentric lens, and the BASE camera is connected to a low-magnification lens. The high-magnification dual telecentric lens and the ZOOM camera work together to photograph small particles, and the low-magnification lens and the BASE camera work together to photograph large particles.

[0004] As a preferred technical solution of this application, the camera mounting bracket is equipped with a ZOOM camera base and a BASE camera base. The ZOOM camera is mounted on the bottom of the ZOOM camera base, and the BASE camera is fixed on the BASE camera base. The upper base plate is provided with a guide groove for mounting the camera mounting bracket. The camera mounting bracket can be moved back and forth along the guide groove to adjust the focus. The inner side of the mounting bracket is also provided with a guide groove. The ZOOM camera base and the BASE camera base can be moved up and down along the guide groove on the inner side of the camera mounting bracket to adjust the field of view of the ZOOM camera and the BASE camera.

[0005] As a preferred technical solution of this application, the channel support is provided with a dispersing channel positioning hole, and the dispersing channel is provided with a dispersing channel positioning pin. The dispersing channel is placed from the upper left corner to the lower right corner, and the dispersing channel positioning pin is inserted into the dispersing channel positioning hole.

[0006] As a preferred technical solution of this application, a dustproof glass baffle is provided on the inner side of the channel support, and a gap is provided between the dustproof glass baffle and the channel support. The dustproof glass is installed in the gap by pulling it up and down.

[0007] As a preferred technical solution of this application, a guide groove is provided on the inner side of the dispersion channel, and the feeding channel is inserted into the dispersion channel along the guide groove on the inner side of the dispersion channel.

[0008] 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 a focusing and holding glass baffle is installed at the bottom of the feeding channel, and the focusing and holding glass is fixed by the focusing and holding glass baffle.

[0009] As a preferred technical solution of this application, the top of the feeding channel is provided with a feeding port, which is funnel-shaped.

[0010] As a preferred technical solution of this application, the bottom of the upper base plate is connected to the lower base plate, and the top of the lower base plate is a sample recovery box located directly below the channel support. The sample recovery box is used to collect the samples after testing.

[0011] As a preferred technical solution of this application, the top of the upper base plate is provided with a feeding structure for feeding material into the feeding channel; the feeding structure includes a funnel lifting device provided on the upper base plate, a funnel connected to the funnel lifting device, a feeding trough below the funnel, and the end of the feeding trough away from the funnel is located above the feeding channel.

[0012] As a preferred technical solution of this application, a feeder bracket is installed on the top of the upper base plate, a shock-absorbing pad is installed on the top of the feeder bracket, a feeder counterweight is installed on the top of the shock-absorbing pad, a linear vibrating feeder is connected to the top of the feeder counterweight, and a feeding trough is installed on the linear vibrating feeder.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: In the scheme of this application: This invention employs two sets of high-speed cameras with different magnification lenses. The high-magnification dual telecentric lens and the ZOOM camera work together to capture small particles, while the low-magnification lens and the BASE camera work together to capture large particles. This expands the measurement range of particle size and improves the accuracy of particle shape parameters. Attached Figure Description

[0014] Figure 1 A cross-sectional structural schematic diagram of the dual-optical-path dynamic image particle size and shape analyzer provided in this application; Figure 2 A schematic diagram of the dustproof glass baffle and dustproof glass structure provided in this application; Figure 3 This is a schematic diagram of the distributed channel and channel support structure provided in this application; Figure 4 This is a schematic diagram of the material feeding channel and the dispersion channel structure provided in this application; Figure 5 A schematic diagram of the feeding channel and focusing glass provided in this application; Figure 6 Schematic diagrams of three different spacing feeding channel structures provided in this application; Figure 7 This is a schematic diagram of the distributed channel and calibration plate structure provided in this application; Figure 8 This is a schematic diagram of the calibration plate installation structure provided in this application; Figure 9 This is a schematic diagram of the camera mounting bracket structure provided in this application; Figure 10 The image shows a screenshot taken by the dual-optical-path dynamic image particle size and shape analyzer provided in this application.

[0015] The image shows: 1. Funnel; 2. Funnel lifting device; 3. Linear vibrating feeder; 4. Feeder counterweight; 5. Shock-absorbing pad; 6. Feeder bracket; 7. Control circuit board; 8. Upper base plate; 9. Lower base plate; 10. Power switch; 11. Feeding trough; 12. Flat panel light source; 13. Sample recovery box; 14. Discharge channel; 15. Focusing glass; 16. Dustproof glass; 17. High magnification dual telecentric lens; 18. ZOOM camera; 19. Low magnification lens; 20. BASE camera; 21. Channel bracket; 22. Dispersion channel; 23. Camera mounting bracket; 24. Dispersion channel positioning hole; 25. Dispersion channel positioning pin; 26. Focusing glass baffle; 27. Calibration plate; 28. ZOOM camera base; 29. ​​BASE camera base; 30. Discharge port; 31. Dustproof glass baffle. Detailed Implementation

[0016] 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 of the present invention. 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 scope of protection of the present invention.

[0017] 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.

[0018] 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.

[0019] Example 1, please refer to Figures 1-9 A dual-path dynamic image particle size and shape analyzer includes a dynamic image acquisition device. The dynamic image acquisition device includes an upper base plate 8, with a channel support 21 on the top of the upper base plate 8. Dustproof glass 16 is installed on both sides of the channel support 21. A dispersion channel 22 is also provided within the channel support 21, and a replaceable feeding channel 14 is provided within the dispersion channel 22. Focusing and holding glass 15 is installed on both sides of the feeding channel 14. A flat panel light source 12 and a camera mounting bracket 23 are mounted on the top of the upper base plate 8. 12 are located on both sides of the channel bracket 21. A ZOOM camera 18 and a BASE camera 20 are installed on the camera mounting bracket 23. The ZOOM camera 18 is connected to a high-magnification dual telecentric lens 17, and the BASE camera 20 is connected to a low-magnification lens 19. The high-magnification dual telecentric lens 17 and the ZOOM camera 18 work together to capture small particles, while the low-magnification lens 19 and the BASE camera 20 work together to capture large particles. This expands the measurement range of particle size, improves the accuracy of particle shape parameters, and eliminates the need for frequent lens replacements.

[0020] Reference Figure 9 The camera mounting bracket 23 is bolted to a ZOOM camera base 28 and a BASE camera base 29. The ZOOM camera 18 is mounted on the bottom of the ZOOM camera base 28, and the BASE camera 20 is bolted to the BASE camera base 29. The upper base plate 8 is provided with a guide groove for mounting the camera mounting bracket 23 with bolts. The camera mounting bracket 23 can be moved back and forth along the guide groove to adjust the focus. The inner side of the camera mounting bracket 23 is also provided with a guide groove for bolts to pass through. The ZOOM camera base 28 and the BASE camera base 29 can be moved up and down along the guide groove on the inner side of the camera mounting bracket 23 to adjust the field of view of the ZOOM camera 18 and the BASE camera 20.

[0021] Reference Figure 3 The diagram shows the installation of the dispersing channel 22 and the channel bracket 21. The channel bracket 21 is provided with a dispersing channel positioning hole 24, and the dispersing channel 22 is provided with a dispersing channel positioning pin 25. The dispersing channel 22 is placed from the upper left corner to the lower right corner. The dispersing channel positioning pin 25 is inserted into the dispersing channel positioning hole 24. The dispersing channel 22 is accurately positioned through the three-point positioning function.

[0022] A dustproof glass baffle 31 is provided on the inner side of the channel support 21. There is a gap between the dustproof glass baffle 31 and the channel support 21. The dustproof glass 16 is installed in the gap by pulling it up and down.

[0023] A guide groove is provided on the inner side of the dispersion channel 22. The feeding channel 14 is inserted into the dispersion channel 22 along the guide groove on the inner side of the dispersion channel 22, and can be replaced, such as... Figure 6 The diagram shows three different spacings of the feeding channels 14, from left to right: 5mm spacing, 10mm spacing, and 20mm spacing. Small-diameter particles use the 5mm spacing feeding channel 14, medium-diameter particles use the 10mm spacing feeding channel 14, and large-diameter particles use the 20mm spacing feeding channel 14. The focusing and holding glass 15 can prevent particles from splashing during the falling process, keep the falling particles within the lens depth of field, and improve the clarity of the captured particle image.

[0024] The feeding channel 14 is provided with a gap for installing the focusing and holding glass 15. The focusing and holding glass 15 is inserted into the gap of the feeding channel 14 from bottom to top, and a focusing and holding glass baffle 26 is installed at the bottom of the feeding channel 14. The focusing and holding glass 15 is fixed by the focusing and holding glass baffle 26.

[0025] It also includes a calibration plate 27, which is placed in the guide groove inside the dispersion channel 22 when adjusting the optical path, and is removed to install the feeding channel 14 when in use.

[0026] Furthermore, a dual-optical-path, dual-camera collaborative working mode is adopted, with the ZOOM camera 18 positioned above the BASE camera 20. When falling particles pass through the measurement area, both the ZOOM camera 18 and the BASE camera 20 simultaneously capture the falling particles. Due to the different heights of the ZOOM camera 18 and the BASE camera 20, the field of view of the ZOOM camera 18 is above the field of view of the BASE camera 20; therefore, the fields of view of the ZOOM camera 18 and the BASE camera 20 are separate. Figure 10 As shown, based on the defined particle size thresholds, the ZOOM camera 18 and the high-magnification dual telecentric lens 17 capture and retain images of small-sized particles, while the low-magnification lens 19 and the BASE camera 20 capture and retain images of large-sized particles, so as to simultaneously measure small-sized and large-sized particles. Finally, the host computer software statistically analyzes the particle images captured by the ZOOM camera 18 and the BASE camera 20 and gives a summary measurement result. Figure 10 In the diagram, point A is marked as the field of view of the BASE camera 20, point B is marked as the field of view of the ZOOM camera 18, and point C is marked as the magnified field of view of the ZOOM camera 18.

[0027] The dual-optical-path, dual-camera collaborative working mode significantly expands the instrument's measurement range, enabling simultaneous measurement of both small and large particle sizes. 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 lens magnification with 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.

[0028] Furthermore, a discharge port 30 is provided at the top of the discharge channel 14. The discharge port 30 is funnel-shaped, and the discharge port 30 is designed to facilitate the sample falling into the discharge channel 14.

[0029] Furthermore, the position of the dustproof glass 16 corresponds to the positions of the dispersion channel 22, the feeding channel 14, the focus holding glass 15, the high-magnification dual telecentric lens 17, and the low-magnification lens 19.

[0030] Furthermore, the bottom of the upper base plate 8 is connected to the lower base plate 9, and the top of the lower base plate 9 is a sample recovery box 13 located directly below the channel bracket 21. The sample recovery box 13 is used to collect the samples after testing.

[0031] Example 2 further optimizes the dual-optical-path dynamic image particle size and shape analyzer provided in Example 1. Specifically, as follows: Figure 1 As shown, a feeding structure is provided on the top of the upper base plate 8, which is used to feed materials to the feeding channel 14.

[0032] Furthermore, the feeding structure includes a funnel lifting device 2 installed on the upper base plate 8. A funnel 1 is connected to the funnel lifting device 2. A feeding trough 11 is located below the funnel 1, and the end of the feeding trough 11 away from the funnel 1 is located above the feeding channel 14. The funnel lifting device 2 can provide support for the funnel 1 and realize the adjustment of the height of the funnel 1.

[0033] Furthermore, a feeder bracket 6 is installed on the top of the upper base plate 8, a shock-absorbing pad 5 is installed on the top of the feeder bracket 6, a feeder counterweight 4 is installed on the top of the shock-absorbing pad 5, and a linear vibrating feeder 3 is connected to the top of the feeder counterweight 4. A feeding groove 11 is installed on the linear vibrating feeder 3. The shock-absorbing pad 5 is made of highly elastic rubber material, which can absorb the vibration energy of the linear vibrating feeder 3. Combined with the inertial damping effect of the feeder counterweight 4, it effectively prevents vibration from being transmitted to precision components such as cameras and lenses. The linear vibrating feeder 3 makes the sample slide evenly along the feeding groove 11 through high-frequency vibration. Its vibration parameters are adjustable, and the feeding speed can be controlled according to the particle size, so that the particles entering the measurement area are evenly distributed, improving the efficiency and accuracy of image recognition.

[0034] Furthermore, a control circuit board 7 is installed on the upper base plate 8. The linear vibrating feeder 3, the ZOOM camera 18, the BASE camera 20, and the flat light source 12 are all connected to the control circuit board 7. The control circuit board 7 integrates a microprocessor, which enables coordinated control of the various components.

[0035] Furthermore, the control circuit board 7 is also connected to a power switch 10, which is mounted on the lower base plate 9.

[0036] The usage process of the dual-optical-path dynamic image particle size and shape analyzer provided by this invention is as follows: First, the sample is poured into funnel 1. The sample in funnel 1 enters the feeding trough 11. Then, the frequency and amplitude of the linear vibrating feeder 3 are adjusted so that the sample falls into the discharge port 30 and into the discharge channel 14. After passing through the focusing and holding glass 15, it finally falls into the sample recovery box 13. The falling speed of the particles is adjusted so that when the particles fall into the discharge channel 14, the total projected area of ​​the particles in the images taken by the ZOOM camera 18 and the BASE camera 20 accounts for about 1% of the image area.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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 invention according to the specific circumstances.

[0038] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention 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 specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A dual-optical-path dynamic image particle size and shape analyzer, characterized in that, The system includes a dynamic image acquisition device, comprising an upper base plate (8), a channel bracket (21) on the top of the upper base plate (8), dustproof glass (16) on both sides of the channel bracket (21), a dispersion channel (22) in the channel bracket (21), a feeding channel (14) in the dispersion channel (22), focusing and holding glass (15) on both sides of the feeding channel (14), a flat panel light source (12) and a camera mounting bracket (23) on the top of the upper base plate (8), and a camera... The mounting bracket (23) and the flat light source (12) are located on both sides of the channel bracket (21). The camera mounting bracket (23) is equipped with a ZOOM camera (18) and a BASE camera (20). The ZOOM camera (18) is connected to a high-magnification dual telecentric lens (17), and the BASE camera (20) is connected to a low-magnification lens (19). The high-magnification dual telecentric lens (17) and the ZOOM camera (18) work together to photograph small particles, and the low-magnification lens (19) and the BASE camera (20) work together to photograph large particles.

2. The dual-optical-path dynamic image particle size and shape analyzer according to claim 1, characterized in that, The camera mounting bracket (23) is equipped with a ZOOM camera base (28) and a BASE camera base (29). The ZOOM camera (18) is mounted on the bottom of the ZOOM camera base (28), and the BASE camera (20) is fixed on the BASE camera base (29). The upper base plate (8) is provided with a guide groove for mounting the camera mount (23). The camera mount (23) can be moved back and forth along the guide groove to adjust the focus. The inner side of the camera mount (23) is also provided with a guide groove. The ZOOM camera base (28) and BASE camera base (29) can be moved up and down along the guide groove on the inner side of the camera mount (23) to adjust the field of view of the ZOOM camera (18) and BASE camera (20).

3. The dual-optical-path dynamic image particle size and shape analyzer according to claim 1, characterized in that, The channel support (21) is provided with a dispersing channel positioning hole (24), and the dispersing channel (22) is provided with a dispersing channel positioning pin (25). The dispersing channel (22) is placed from the upper left corner to the lower right corner, and the dispersing channel positioning pin (25) is inserted into the dispersing channel positioning hole (24). The dispersing channel (22) is accurately positioned through the three-point positioning function.

4. The dual-optical-path dynamic image particle size and shape analyzer according to claim 2, characterized in that, A dustproof glass baffle (31) is provided on the inner side of the channel support (21). A gap is provided between the dustproof glass baffle (31) and the channel support (21). The dustproof glass (16) is installed in the gap by pulling up and down.

5. The dual-optical-path dynamic image particle size and shape analyzer according to claim 1, characterized in that, The inner side of the dispersion channel (22) is provided with a guide groove, and the feeding channel (14) is inserted into the dispersion channel (22) along the guide groove on the inner side of the dispersion channel (22).

6. The dual-optical-path dynamic image particle size and shape analyzer according to claim 1, characterized in that, The feeding channel (14) is provided with a gap for installing the focusing and holding glass (15). The focusing and holding glass (15) is inserted into the gap of the feeding channel (14) from bottom to top, and a focusing and holding glass baffle (26) is installed at the bottom of the feeding channel (14). The focusing and holding glass (15) is fixed by the focusing and holding glass baffle (26).

7. The dual-optical-path dynamic image particle size and shape analyzer according to claim 1, characterized in that, The top of the feeding channel (14) is provided with a feeding port (30), which is funnel-shaped.

8. The dual-optical-path dynamic image particle size and shape analyzer according to claim 1, characterized in that, The bottom of the upper base plate (8) is connected to the lower base plate (9), and the top of the lower base plate (9) is a sample recovery box (13) located directly below the channel bracket (21). The sample recovery box (13) is used to collect the sample after testing.

9. The dual-optical-path dynamic image particle size and shape analyzer according to claim 1, characterized in that, The top of the upper base plate (8) is provided with a feeding structure for feeding material into the feeding channel (14). The feeding structure includes a funnel lifting device (2) provided on the upper base plate (8), a funnel (1) connected to the funnel lifting device (2), a feeding trough (11) below the funnel (1), and the end of the feeding trough (11) away from the funnel (1) is located above the feeding channel (14).

10. The dual-optical-path dynamic image particle size and shape analyzer according to claim 9, characterized in that, The top of the upper base plate (8) is equipped with a feeder bracket (6), the top of the feeder bracket (6) is equipped with a shock-absorbing pad (5), the top of the shock-absorbing pad (5) is equipped with a feeder counterweight (4), the top of the feeder counterweight (4) is connected to a linear vibrating feeder (3), and a feeding trough (11) is installed on the linear vibrating feeder (3).

11. The dual-optical-path 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 (18) is above the field of view of the BASE camera (20). The fields of view of the ZOOM camera (18) and the BASE camera (20) are separate, avoiding mutual interference between particles of different sizes during imaging. The high-magnification dual telecentric lens (17) and the ZOOM camera (18) capture and retain images of small-sized particles, while the low-magnification lens (19) and the BASE camera (20) capture and retain images of large-sized particles, so as to simultaneously measure small-sized and large-sized particles. Finally, the host computer software statistically analyzes the particle images captured by the ZOOM camera (18) and the BASE camera (20) according to the divided particle size threshold, and gives the summary measurement results.

Images