A Debris Removal System and Method Based on Wind-Separated Multimodal Optical Detection

Abstract

This invention relates to a debris removal system and method based on multimodal optical detection using air separation. The system includes a feed duct, a primary visual inspection and removal unit, a secondary laser inspection and removal unit arranged sequentially along the material conveying direction of the feed duct, a debris collection unit connected to the feed duct, and a noise reduction and maintenance unit that encloses noise-generating components. This invention forms a redundant and complementary detection system through dual-modal optical detection using both vision and laser. Primary visual inspection quickly removes debris with obvious optical characteristics, while secondary laser inspection identifies foreign objects of the same color in blind spots of visual inspection based on the physical properties of the material surface. This significantly improves the overall debris detection and removal rate, ensuring the high purity of the finished product.

Description

Technical Field

[0001] This invention belongs to the field of material sorting and detection technology, specifically relating to a debris removal system and method based on wind-classified multimodal optical detection. Background Technology

[0002] Air separation feeding is a key step in tobacco processing. It utilizes the differences in aerodynamic properties between materials and impurities to achieve initial separation, providing a uniform and smooth material flow for subsequent optical inspection. Existing impurity removal technologies in the tobacco industry mostly adopt a single-camera visual inspection + pneumatic removal mode. This mode mainly consists of a primary inspection unit, an image processing unit, a primary removal unit, and a simple impurity collection device. The workflow is as follows: after the material enters the inspection area, the camera takes a picture, and after the algorithm identifies the impurities, it triggers an air valve to blow the impurities out, thus completing the removal.

[0003] However, the aforementioned existing technologies have many inherent defects in practical applications and can no longer meet the needs of high-quality tobacco leaf production: The detection dimension is limited and the false negative rate is high: relying solely on camera vision detection, the ability to distinguish light impurities that are similar in color and texture to tobacco leaves, such as white plastic film and light-colored synthetic fibers, is limited. Such foreign objects of the same color are very easy to miss, resulting in insufficient purity of the finished tobacco leaves. The system has no redundant detection mechanism and low reliability: the entire rejection process only has one chance to detect and reject. If the first rejection fails due to material overlap, abnormal camera exposure, algorithm judgment error or other reasons, the impurities will directly enter the clean material without any remedial measures. Severe noise pollution and harsh working environment: The high-speed rejection air valve is directly exposed to the outside of the equipment, and the high-frequency popping sound generated when the compressed air is injected has no sound insulation measures, resulting in a persistently high noise level at the production site; Poor air pressure stability affects the detection effect: The debris discharge channel is mostly an open or simple connection structure. When the rejection action occurs, it will disturb the airflow of the main air duct, destroy the stability of the wind speed and pressure in the feed air duct, and interfere with the subsequent material conveying and detection. Poor maintenance convenience and easy contamination of equipment: The air valve and material discharge channel are open structures, and the smoke and dust generated during operation can easily spread and contaminate the equipment. Moreover, cleaning and maintenance require dealing with complex exposed mechanical structures, which makes operation difficult and inefficient.

[0004] Therefore, this invention proposes a debris removal system and method based on wind-classification multimodal optical detection to solve the above-mentioned technical problems, so as to meet the actual needs of tobacco processing production, and can also be extended to other material wind-classification and sorting application scenarios. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: The debris removal system based on wind-separated multimodal optical detection includes a feeding air duct, a primary visual detection removal unit and a secondary laser detection removal unit arranged sequentially along the material conveying direction of the feeding air duct, a debris collection unit connected to the feeding air duct, and a noise reduction and maintenance unit that wraps the noise-generating components. The primary visual inspection and rejection unit includes a visual imaging component located in the visual inspection area of ​​the feed duct, an industrial control computer electrically connected to the visual imaging component, and a primary rejection execution component electrically connected to the industrial control computer. The visual imaging component acquires material flow images in the feed duct and transmits them to the industrial control computer. After the industrial control computer identifies the debris, it triggers the action of the primary rejection execution component to separate the debris from the feed duct to the debris collection unit. The secondary laser detection and rejection unit includes a laser detection component located in the laser detection area of ​​the feed duct and a secondary rejection execution component electrically connected to the laser detection component. The laser detection component performs laser scanning detection on the material after it has been processed by the primary visual detection and rejection unit. After identifying the missed rejection items, it triggers the action of the secondary rejection execution component to separate the missed rejection items from the feed duct to the debris collection unit.

[0006] As a preferred embodiment of the present invention, the debris collection unit includes a debris discharge channel, an air lock, and a debris bin. The debris discharge channel is connected to the inlet air duct to receive separated debris. The air lock is located at the outlet end of the debris discharge channel. The debris bin is connected to the outlet end of the air lock. The air lock is used to discharge debris and maintain stable air pressure in the inlet air duct. The noise reduction maintenance unit includes a frame body that encloses the primary rejection execution component and the secondary rejection execution component, as well as a sliding door that can be opened and closed on one side of the frame body.

[0007] As a preferred embodiment of the present invention, the visual imaging component includes an LED surface light source and a detection camera, wherein the detection camera is a linear array or area array camera, and the detection camera is electrically connected to an industrial control computer and transmits material flow images thereto.

[0008] As a preferred embodiment of the present invention, the laser detection component includes a laser box and a laser scanning line emitted by the laser box. The laser box integrates a laser line generator and a photoelectric image sensor. The laser scanning line emitted by the laser line generator is a structured light that spans the feed air duct. The photoelectric image sensor is installed at a preset angle and captures the laser line image after the material is modulated.

[0009] As a preferred embodiment of the present invention, the laser box analyzes the brightness, continuity and positional distortion of the laser line image to determine the physical properties of the material surface in order to identify lightweight impurities similar to the optical characteristics of tobacco leaves.

[0010] In a preferred embodiment of the present invention, both the primary rejection execution component and the secondary rejection execution component are rejection air valves controlled by high-speed solenoid valves. The industrial control computer sends a pulse trigger signal with a width of milliseconds to the primary rejection execution component, and the laser box sends a trigger signal to the secondary rejection execution component.

[0011] As a preferred embodiment of the present invention, the debris discharge channel is an inclined slide, and the airlock is a rotary discharge valve or a star feeder, which includes a rotor with multiple blades and a sealed housing that cooperates with the rotor. The rotor rotates at a constant speed to form a dynamic physical barrier to achieve sealed conveying of debris.

[0012] In a preferred embodiment of the present invention, the miscellaneous material bin is a funnel-shaped container, and the discharge end of the funnel-shaped container is connected to a miscellaneous material collection frame.

[0013] As a preferred embodiment of the present invention, the frame body is a metal structural frame, and the inner wall of the frame body is covered with a porous sound-absorbing material, which is one or more of centrifugal glass wool, rock wool or polyurethane foam, and the sliding door is a horizontal push-pull type or a flip type.

[0014] This invention also provides a method for debris removal based on wind-soring multimodal optical detection, comprising the following steps: S1. Air separation and initial visual inspection and rejection: The material is conveyed along the feed duct under the action of airflow. The visual imaging component of the initial visual inspection and rejection unit continuously collects the material flow image in the feed duct and transmits it to the industrial control computer for debris identification. After the debris is identified, a millisecond-level pulse signal is sent to the initial rejection execution component. The initial rejection execution component sprays compressed air to separate the debris from the feed duct and blow it into the debris drop channel of the connected debris collection unit. S2, Secondary Laser Inspection and Rejection: Materials rejected by the initial visual inspection continue to be conveyed along the feed duct. The laser inspection component of the secondary laser inspection and rejection unit emits a laser scanning line to perform a full-coverage scan of the material. The photoelectric image sensor captures the laser line image modulated by the material and transmits it to the laser box. The laser box analyzes the image features to identify missed lightweight debris. After the missed debris is identified, the secondary rejection execution component is triggered to separate the missed debris from the feed duct and blow it into the debris drop channel of the debris collection unit. S3. Debris collection and air pressure stabilization: Debris in the debris discharge channel is collected by gravity and slides into the airlock. The rotor of the airlock is driven by a motor to rotate at a constant speed. Through the dynamic sealing structure between the rotor blades and the shell, the debris is transported from the air separation duct system to the atmospheric pressure debris bin while maintaining the air pressure in the feed duct. Finally, it falls into the debris collection frame. S4. Noise Control and Convenient Maintenance: The noise generated by the primary and secondary rejection execution components is reflected multiple times by the sound-absorbing materials on the frame body and inner wall, thus consuming energy and achieving on-site noise attenuation. Operators can clean the rejection execution components, check the nozzles, or replace vulnerable parts by opening and closing the sliding door on the frame body to complete equipment maintenance.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention forms a redundant and complementary detection system through dual-modal optical detection using vision and laser. The first visual detection quickly removes impurities with obvious optical characteristics, while the second laser detection identifies foreign objects of the same color in the blind spot of visual detection based on the physical characteristics of the material surface. This significantly improves the overall detection and removal rate of impurities, ensuring the high purity of the finished product. The second laser detection, as a re-inspection and supplementary removal unit, accurately identifies and removes the impurities missed by the first detection, effectively compensating for the random error of a single detection. This allows the system to work stably even under complex working conditions such as material overlap and light interference, greatly reducing the probability of impurities escaping. 2. This invention achieves dynamic and sealed conveying of debris through an airlock. The high-precision seal between the rotor and the housing forms a physical barrier to prevent the airflow in the feed duct from being disturbed when the debris is discharged, thus maintaining the stability of the wind speed and pressure in the duct and ensuring the continuity and accuracy of material conveying and subsequent testing. 3. This invention encloses the main noise source, the air valve, within a metal frame covered with sound-absorbing material. Noise attenuation is achieved through sound wave reflection and energy consumption, effectively reducing the noise level at the production site from the sound source propagation path. Furthermore, the main frame is equipped with a sliding door that can be opened and closed quickly, providing operators with a convenient access to the equipment, facilitating the cleaning of the air valve, inspection of the nozzle, and replacement of vulnerable parts. At the same time, the enclosed structure reduces the pollution of the equipment by smoke and dust, extending the service life of the equipment. 4. Each unit of the present invention is modularly designed, with a simple and compact structure. It can be directly installed on existing air separation feeding equipment without the need for large-scale modification of the original equipment, thus reducing equipment upgrade costs. It is not only suitable for tobacco processing, but can also be extended to the air separation of other materials such as grain and chemical products, and has broad application prospects. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the internal side view structure of the present invention.

[0017] In the diagram: 1. Feed air duct; 2. Primary visual inspection rejection unit; 21. Visual imaging component; 211. Inspection camera; 22. Primary rejection execution component; 3. Secondary laser inspection rejection unit; 31. Laser inspection component; 311. Laser box; 312. Laser scanning line; 32. Secondary rejection execution component; 4. Debris collection unit; 41. Debris discharge channel; 42. Airlock; 43. Debris silo; 5. Noise reduction and maintenance unit; 51. Frame body; 52. Sliding door. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0019] like Figures 1-3 As shown, the present invention provides a debris removal system based on wind-sorting multimodal optical detection, including a feeding air duct 1, a primary visual detection removal unit 2 and a secondary laser detection removal unit 3 arranged sequentially along the material conveying direction of the feeding air duct 1, a debris collection unit 4 connected to the feeding air duct 1, and a noise reduction and maintenance unit 5 that wraps the noise-generating components. Specifically, the primary visual detection removal unit 2 is located on the front side of the frame body 51, and the secondary laser detection removal unit is located on the top of the frame body 51. The primary visual inspection rejection unit 2 includes a visual imaging component 21 located in the visual inspection area of ​​the feed duct 1, an industrial control computer electrically connected to the visual imaging component 21, and a primary rejection execution component 22 electrically connected to the industrial control computer. The primary rejection execution component 22 is installed in the visual inspection area of ​​the feed duct 1 and close to the bottom of the frame body 51. The visual imaging component 21 collects material flow images in the feed duct 1 and transmits them to the industrial control computer. After the industrial control computer identifies the debris, it triggers the action of the primary rejection execution component 22 to separate the debris from the feed duct 1 to the debris collection unit 4. The secondary laser detection rejection unit 3 includes a laser detection component 31 located in the laser detection area of ​​the feed duct 1 and a secondary rejection execution component 32 electrically connected to the laser detection component 31. The secondary rejection execution component 32 is installed in the laser detection area of ​​the feed duct 1 and is close to the end of the feed duct 1. The laser detection component 31 performs laser scanning detection on the material after it has been processed by the primary visual detection rejection unit 2. After identifying the missed rejects, it triggers the action of the secondary rejection execution component 32 to separate the missed rejects from the feed duct 1 to the debris collection unit 4.

[0020] The debris collection unit 4 includes a debris discharge channel 41, an air lock 42, and a debris bin 43. The debris discharge channel 41 is connected to the feed air duct 1 to receive the separated debris. The air lock 42 is located at the discharge end of the debris discharge channel 41. The debris bin 43 is connected to the discharge end of the air lock 42. The air lock 42 is used to discharge debris and maintain stable air pressure in the feed air duct 1. Specifically, the debris discharge channel 41 is an inclined slide, and the air lock 42 is a rotary discharge valve or a star feeder, which includes a rotor with multiple blades and a sealed shell that cooperates with the rotor. The rotor rotates at a constant speed to form a dynamic physical barrier to achieve sealed conveying of debris. The miscellaneous material bin 43 is a funnel-shaped container. The discharge end of the funnel-shaped container is connected to a miscellaneous material collection frame. After the miscellaneous material is discharged through the airlock 42, it is temporarily stored in the miscellaneous material bin 43 and eventually falls into the miscellaneous material collection frame. Among them, the debris discharge channel 41 is a metal slide with a preset tilt angle of 60°. The tilt angle design meets the requirement that the debris can slide smoothly to the air lock 42 feed port by gravity, thus avoiding the accumulation of debris. The airlock 42 is a rotary feeder or star feeder, consisting of a rotor with multiple blades inside and a sealed housing. A high-precision mechanical seal is used between the rotor and the housing to ensure a very small gap. The motor drives the rotor to rotate at a constant speed. The debris falls from the top feed port into the grid cavity between the blades. As the rotor rotates, the grid cavity carries the debris from the top to the bottom. The key is that because the rotor blades and the housing always maintain close contact, a dynamic physical barrier is formed between the upper feed port and the lower discharge port. This allows the debris to be continuously transported from the high-pressure or negative-pressure air duct system to the normal-pressure debris silo 43. The airflow in the air duct will not be short-circuited through the drop channel, thus maintaining the stability of the wind speed and pressure in the feed air duct 1. The debris discharged from the airlock 42 is temporarily stored in the debris silo 43 and finally guided to the external debris collection frame.

[0021] The noise reduction maintenance unit 5 includes a frame body 51 that encloses the primary rejection execution component 22 and the secondary rejection execution component 32, and a sliding door 52 that can be opened and closed on one side of the frame body 51. Specifically, the main frame 51 is a metal structure frame, and the inner wall of the main frame 51 is covered with porous sound-absorbing material, which is one or more of centrifugal glass wool, rock wool or polyurethane foam. The sliding door 52 is a horizontal sliding door or a flip-up sliding door. This design provides a direct and convenient access channel for the equipment. Operators can easily open the sliding door 52 without using tools or performing complicated disassembly to clean the air valve, check the nozzle blockage, or replace vulnerable parts, which greatly improves the efficiency of daily equipment maintenance and troubleshooting. The main frame 51 is a stainless steel metal structure frame that completely encloses the two rejection execution components. Its inner wall is covered with 50mm thick centrifugal glass wool sound-absorbing material. When the air valve noise is generated inside the frame, the sound waves are reflected multiple times in the sealed space. Its energy is consumed by the sound-absorbing material and converted into heat energy, thereby greatly reducing the noise intensity transmitted to the external environment.

[0022] In this embodiment of the invention, the visual imaging component 21 includes an LED surface light source and a detection camera 211. The detection camera 211 is located on the front side of the frame body 51. The detection camera 211 is a linear array or area array camera. The detection camera 211 is connected to an industrial control computer and transmits material flow images to it. Among them, the high-brightness LED surface light source provides uniform and stable illumination for the camera, avoiding shadow interference. The high-speed color detection camera 211 continuously acquires images of the tobacco material flow in the feed air duct 1 and transmits the images to the industrial control computer in real time. The industrial control computer has a pre-stored machine vision recognition algorithm trained based on tobacco leaf and debris samples. The algorithm analyzes the material flow image in real time from three dimensions: color, such as RGB or HSV space, texture, such as gray-level co-occurrence matrix extraction, and shape. When the image area features are found to be significantly different from the preset tobacco leaf model, such as the appearance of abnormal white blocks or blue threads, it is determined to be debris and its location is located.

[0023] In this embodiment of the invention, the laser detection component 31 includes a laser box 311 and a laser scanning line 312 emitted by the laser box 311. The laser box 311 is installed on the top of the frame body 51. The laser box 311 integrates a laser line generator and a photoelectric image sensor. The photoelectric image sensor is specifically a CMOS / CCD sensor. The laser scanning line 312 emitted by the laser line generator is a structured light that spans the feed air duct 1. The photoelectric image sensor is installed at a preset angle and captures the laser line image after the material is modulated. Among them, the laser scanning line 312 emitted by the laser line generator is an extremely fine and bright structured light that spans the entire feed air duct 1 and irradiates the material; the photoelectric image sensor is installed in the laser box 311 at a preset angle of 45° to capture the laser line image modulated on the material surface and transmit it to the laser box 311. The laser box 311 analyzes the brightness, continuity, and positional distortion of the laser line image to determine the physical properties of the material surface in order to identify lightweight impurities similar to the optical characteristics of tobacco leaves. Unlike camera imaging, this technology does not rely on color, but rather on the modulation of light by the surface morphology of an object. When material passes through a laser line, smooth debris surfaces produce regular, bright specular reflections, while rough tobacco surfaces produce diffuse reflections, forming an irregular, broken bright line. In addition, the height of the object's outline will cause the position of the laser line image on the sensor to shift. The system captures this modulated laser line image using a CMOS / CCD sensor installed at a specific angle. By analyzing the brightness, continuity, and positional distortion of the laser line in the image, the surface physical characteristics of the object can be accurately determined, thereby distinguishing debris with abnormal characteristics from the tobacco background.

[0024] In this embodiment of the invention, both the primary rejection execution component 22 and the secondary rejection execution component 32 are rejection air valves controlled by high-speed solenoid valves. The industrial control computer sends a pulse trigger signal with a millisecond width to the primary rejection execution component 22, and the laser box 311 sends a trigger signal to the secondary rejection execution component 32. Among them, after the industrial control computer identifies and locates the debris, it sends a pulse trigger signal with a millisecond width to the primary rejection execution component 22 at the corresponding position. The air valve opens instantly, and the precisely guided compressed air is sprayed to separate the debris from the tobacco material flow and blow it into the debris drop channel 41 of the debris collection unit 4. After the laser box 311 detects the missed debris, it sends a trigger signal to the secondary rejection execution component 32 at the corresponding position to complete the secondary precise rejection of the debris and blow the debris into the debris discharge channel 41.

[0025] This invention relates to a debris removal method based on wind-sorting multimodal optical detection, comprising the following steps: S1. Air separation and initial visual inspection and rejection: The material is conveyed along the feed duct 1 under the action of airflow. The visual imaging component 21 of the initial visual inspection and rejection unit 2 continuously collects the material flow image in the feed duct 1 and transmits it to the industrial control computer for debris identification. After the debris is identified, a millisecond-level pulse signal is sent to the initial rejection execution component 22. The initial rejection execution component 22 sprays compressed air to separate the debris from the feed duct 1 and blow it into the debris drop channel 41 of the connected debris collection unit 4. S2, Secondary laser inspection and fine rejection: The materials rejected by the initial visual inspection continue to be conveyed along the feed air duct 1. The laser inspection component 31 of the secondary laser inspection and rejection unit 3 emits a laser scanning line 312 to perform a full-coverage scan of the materials. The photoelectric image sensor captures the laser line image modulated by the materials and transmits it to the laser box 311. The laser box 311 analyzes the image features to identify the missed light debris. After the missed debris is identified, the secondary rejection execution component 32 is triggered to separate the missed debris from the feed air duct 1 and blow it into the debris drop channel 41 of the debris collection unit 4. S3. Debris collection and air pressure stabilization: Debris in the debris discharge channel 41 is collected by gravity and slides into the air lock 42. The rotor of the air lock 42 is driven by a motor to rotate at a constant speed. Through the dynamic sealing structure between the rotor blades and the shell, the debris is transported from the air separation channel system to the atmospheric pressure debris bin 43 under the premise of maintaining stable air pressure in the feed air duct 1, and finally falls into the debris collection frame. S4. Noise control and convenient maintenance: The noise generated by the primary rejection execution component 22 and the secondary rejection execution component 32 is reflected multiple times by the frame body 51 and the sound-absorbing material on the inner wall, and the energy is consumed, so as to achieve noise reduction on site. Operators can clean the rejection execution components, check the nozzles or replace vulnerable parts by opening and closing the sliding door 52 on the frame body 51 to complete equipment maintenance.

[0026] Of course, the above embodiments are not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A debris removal system based on wind-separated multimodal optical detection, characterized in that: It includes a feeding air duct (1), a primary visual inspection rejection unit (2) and a secondary laser inspection rejection unit (3) arranged sequentially along the material conveying direction of the feeding air duct (1), a debris collection unit (4) connected to the feeding air duct (1), and a noise reduction and maintenance unit (5) that wraps the noise generating components. The first visual inspection rejection unit (2) includes a visual imaging component (21) located in the visual inspection area of ​​the feed duct (1), an industrial control computer electrically connected to the visual imaging component (21), and a first rejection execution component (22) electrically connected to the industrial control computer. The visual imaging component (21) collects material flow images in the feed duct (1) and transmits them to the industrial control computer. After the industrial control computer identifies the debris, it triggers the action of the first rejection execution component (22) to separate the debris from the feed duct (1) to the debris collection unit (4). The secondary laser detection rejection unit (3) includes a laser detection component (31) located in the laser detection area of ​​the feed air duct (1) and a secondary rejection execution component (32) electrically connected to the laser detection component (31). The laser detection component (31) performs laser scanning detection on the material after it has been processed by the primary visual detection rejection unit (2). After identifying the missed rejection debris, it triggers the action of the secondary rejection execution component (32) to separate the missed rejection debris from the feed air duct (1) to the debris collection unit (4).

2. The debris removal system based on wind-separated multimodal optical detection according to claim 1, characterized in that: The debris collection unit (4) includes a debris discharge channel (41), an airlock (42), and a debris bin (43). The debris discharge channel (41) is connected to the feed air duct (1) to receive separated debris. The airlock (42) is located at the discharge end of the debris discharge channel (41). The debris bin (43) is connected to the discharge end of the airlock (42). The airlock (42) is used to discharge debris and maintain stable air pressure in the feed air duct (1). The noise reduction maintenance unit (5) includes a frame body (51) that encloses the primary rejection execution component (22) and the secondary rejection execution component (32), and a sliding door (52) that can be opened and closed on one side of the frame body (51).

3. The debris removal system based on wind-sorting multimodal optical detection according to claim 2, characterized in that: The visual imaging component (21) includes an LED surface light source and a detection camera (211). The detection camera (211) is a linear array or area array camera. The detection camera (211) is connected to an industrial control electromechanical system and transmits material flow images to it.

4. The debris removal system based on wind-separated multimodal optical detection according to claim 3, characterized in that: The laser detection component (31) includes a laser box (311) and a laser scanning line (312) emitted by the laser box (311). The laser box (311) integrates a laser line generator and a photoelectric image sensor. The laser scanning line (312) emitted by the laser line generator is a structured light that spans the feed air duct (1). The photoelectric image sensor is installed at a preset angle and captures the laser line image after the material is modulated.

5. The debris removal system based on wind-sorting multimodal optical detection according to claim 4, characterized in that: The laser box (311) analyzes the brightness, continuity and positional distortion of the laser line image to determine the physical properties of the material surface in order to identify lightweight impurities similar to the optical characteristics of tobacco leaves.

6. The debris removal system based on wind-sorting multimodal optical detection according to claim 5, characterized in that: Both the primary rejection execution component (22) and the secondary rejection execution component (32) are rejection air valves controlled by high-speed solenoid valves. The industrial control computer sends a pulse trigger signal with a millisecond width to the primary rejection execution component (22), and the laser box (311) sends a trigger signal to the secondary rejection execution component (32).

7. The debris removal system based on wind-sorting multimodal optical detection according to claim 2, characterized in that: The debris discharge channel (41) is a slide with an inclination angle, and the air lock (42) is a rotary discharge valve or a star feeder, which includes a rotor with multiple blades and a sealed shell that cooperates with the rotor. The rotor rotates at a constant speed to form a dynamic physical barrier to achieve sealed conveying of debris.

8. The debris removal system based on wind-separated multimodal optical detection according to claim 7, characterized in that: The miscellaneous material bin (43) is a funnel-shaped container, and the discharge end of the funnel-shaped container is connected to a miscellaneous material collection frame.

9. The debris removal system based on wind-sorting multimodal optical detection according to claim 2, characterized in that: The frame body (51) is a metal structure frame, and the inner wall of the frame body (51) is covered with porous sound-absorbing material, which is one or more of centrifugal glass wool, rock wool or polyurethane foam. The sliding door (52) is a horizontal push-pull type or a flip type.

10. A method for debris removal based on wind-separated multimodal optical detection, characterized in that: The debris removal system based on wind-sorting multimodal optical detection, as described in any one of claims 1-9, comprises the following steps: S1. Air separation and initial visual inspection and rejection: The material is conveyed along the feed duct (1) under the action of airflow. The visual imaging component (21) of the first visual inspection and rejection unit (2) continuously collects the material flow image in the feed duct (1) and transmits it to the industrial control computer for debris identification. After the debris is identified, a millisecond-level pulse signal is sent to the first rejection execution component (22). The first rejection execution component (22) sprays compressed air to separate the debris from the feed duct (1) and blow it into the debris drop channel (41) of the connected debris collection unit (4). S2, Secondary laser detection and fine rejection: The material rejected by the initial visual inspection continues to be conveyed along the feed air duct (1). The laser detection component (31) of the secondary laser detection and rejection unit (3) emits a laser scanning line (312) to scan the material in full coverage. The photoelectric image sensor captures the laser line image after the material is modulated and transmits it to the laser box (311). The laser box (311) analyzes the image features to identify the light debris that was missed. After the missed debris is identified, the action of the secondary rejection execution component (32) is triggered to separate the missed debris from the feed air duct (1) and blow it into the debris drop channel (41) of the debris collection unit (4). S3. Debris collection and air pressure stabilization: Debris in the debris discharge channel (41) is collected by gravity and slides into the air lock (42). The rotor of the air lock (42) is driven by the motor to rotate at a constant speed. Through the dynamic sealing structure between the rotor blades and the shell, the debris is transported from the air separation channel system to the atmospheric pressure debris bin (43) under the premise of maintaining the air pressure stability in the feed air duct (1), and finally falls into the debris collection frame. S4. Noise control and convenient maintenance: The noise generated by the primary rejection execution component (22) and the secondary rejection execution component (32) is reflected multiple times by the frame body (51) and the sound-absorbing material on the inner wall and consumes energy, so as to achieve noise attenuation on site. The operator can clean the rejection execution component, check the nozzle or replace the vulnerable parts by opening and closing the sliding door (52) on the frame body (51) to complete the equipment maintenance.

Images