Mulch film detection and hook tooth removal system

Abstract

This invention discloses a plastic film detection and hook-tooth removal system. The system includes a detection area, a control area, and a removal area, primarily for detecting and removing plastic film from cotton seeds. The detection area collects and transmits various types of polarized light; the control area processes and analyzes the polarization characteristics of the polarized light to determine whether a removal command is issued and the target coordinates; the removal area receives the command and coordinates and controls the rotation of the corresponding hook-tooth racks to hook the plastic film above the collection channel. Under the action of the plastic film brush, the plastic film detaches from the hook-tooth racks and falls into the plastic film collection channel. This invention achieves integrated cotton seed detection and removal. In terms of plastic film detection, it utilizes the difference in polarization characteristics between cotton seeds and plastic film for differentiation, eliminating the need for image processing and improving the accuracy of the actuators. In terms of plastic film removal, considering the actual impurity content of the cotton seeds, a hook-tooth assembly is used as the actuator to ensure effective removal.

Description

Technical Field

[0001] This invention relates to the field of cotton seed mulch film detection and removal, mainly targeting the detection and removal of transparent or semi-transparent mulch film, specifically a mulch film detection and hook-tooth removal system. Background Technology

[0002] With the introduction of cotton harvesters, foreign fibers such as plastic film inevitably mix into the cotton during mechanized harvesting. The presence of these foreign fibers directly affects cotton quality and the quality of subsequent cotton processing products, even causing significant economic losses for many cotton textile enterprises. To address this issue, systems for removing foreign fibers from seed cotton have emerged, primarily involving manual and machine cleaning. Manual cleaning is effective but suffers from high labor costs, low efficiency, and limited continuous operation. Existing seed cotton foreign fiber removal devices can handle most foreign fibers except for transparent plastic film; however, due to the similar color of transparent plastic film to cotton, traditional technologies struggle to identify it. Some companies have begun using polarized light and image processing technology at the lint stage to identify and remove transparent plastic film. However, because the plastic film is broken up during seed cotton cleaning and distributed in small pieces within the lint, the detection equipment's performance is unstable, the identification process is complex, and the equipment cost is high. Summary of the Invention

[0003] To address the issues of unstable performance and high equipment costs in cotton seed film identification, this invention provides a cotton seed film detection and hook-tooth removal system. By defining a detection area, a control area, and a removal area, and based on the different effects of cotton seed film and cotton seed on polarized light, the system aims to reduce equipment costs, enhance machine cotton seed film identification and removal capabilities, and reduce the amount of manual labor required.

[0004] This invention provides a plastic film detection and hook-tooth removal system, mainly for detecting and removing plastic film from cotton seeds. The system includes a detection area, a control area, and a removal area. The detection area collects reflected and transmitted polarized light. The control area processes and calculates the polarization characteristics of the polarized light and compares them with polarization characteristics in a database. If no abnormalities are found, the data is stored; if abnormalities are found, a removal command and target coordinates are issued. The removal area receives the removal command and target coordinates and controls the corresponding hook-tooth rack to rotate, hooking the plastic film above the collection channel. Under the action of the plastic film brush, the plastic film detaches from the hook-tooth rack and falls into the plastic film collection channel.

[0005] In this invention, a reflected polarized light receiver, a seed cotton main channel wall, a transmitted polarized light receiver, a transmitted polarized light information transmission line, a seed cotton main channel, a lower reflected polarized light receiver, and a reflected polarized light information transmission line are arranged within the detection area.

[0006] In this invention, the optical analysis module, the command transmission line, and the clearing control module are located within the control area.

[0007] In this invention, the left hook tooth drive device, the left hook tooth group, the left blocking device, the right blocking device, the right hook tooth group, the outer wall of the cleaning device, the right hook tooth drive device, the right mulch film brush disc, the right hook tooth cleaning instruction conveying line, the right mulch film collection channel, the seed cotton discharge channel, the seed cotton discharge channel wall, the left mulch film collection channel, the left hook tooth cleaning instruction conveying line, and the left mulch film brush disc are arranged in the cleaning area.

[0008] In this invention, the working process includes the following steps:

[0009] (1) The upper reflective polarized light receiver, the transmission polarized light receiver, and the lower reflective polarized light receiver receive reflected polarized light and transmission polarized light. The polarization information of each polarized light is transmitted to the optical analysis module in the control area through the transmission polarized light information transmission line and the reflection polarized light information transmission line.

[0010] (2) The polarization signal conditioner in the optical analysis module is responsible for conditioning and converting the polarization characteristic signal. The polarization signal input device is responsible for summarizing the conditioned reflected and transmitted polarized light information and inputting it into the polarization characteristic computer. The polarization characteristic computer is responsible for receiving the processed signal, analyzing the polarization characteristic information of the reflected and transmitted polarized light, and displaying the statistical data on the polarization characteristic display. During the polarization characteristic computer analysis process, the obtained polarization characteristic information will be compared with the polarization characteristic information contained in the database.

[0011] (3) If there is no abnormality during the comparison process, the data is saved and the following steps are not performed; if there is an abnormality, the polarization feature computer in the optical analysis module will determine the location of the polarization effect concentration based on the optical feature information: if the target mulch film is located in the left half or middle of the channel, the removal command and the location coordinates are sent to the removal control module as control signals, and the corresponding left hook tooth group will be driven to rotate; if the target mulch film is located in the right half of the channel, the location coordinates and the removal command are sent to the removal control module as control signals, and the corresponding right hook tooth group will be driven to rotate; if the target mulch film is distributed in both the left and right parts of the channel, the location coordinates and the removal command are sent to the removal control module as control signals, and the corresponding left hook tooth group and right hook tooth group will be driven to rotate simultaneously.

[0012] (4) After an abnormality occurs, the optical analysis module sends a control command and target coordinates to the clearing control module through the command transmission line. The clearing control module converts and conditions the control signal and sends a clearing command to the left hook tooth drive device and / or the right hook tooth drive device.

[0013] (5) The hook teeth of the corresponding hook teeth group rotate to hook the plastic film and bring it to the top of the corresponding collection channel;

[0014] (6) The plastic film is detached from the hook and toothed rack under the action of the right plastic film brush and / or the left plastic film brush and falls into the collection channel, thus completing the work.

[0015] In this invention, the database contains two types of data: a basic polarization information database and a supplementary polarization information database. The basic polarization information database is acquired during non-practical applications. Acquisition is performed without plastic film mulch; seed cotton is placed in the detection area, and the data is collected by a polarization receiving device and stored in the control unit of the optical analysis module. This polarization information is then compiled into the basic polarization information database. The supplementary polarization information database is acquired during actual applications. During actual applications, if the input polarization information is determined to be normal by the optical analysis module, this polarization information is stored in the control unit of the optical analysis module. This polarization information is then compiled into the supplementary polarization information database.

[0016] In this invention, the correspondence between impurities in the seed cotton mulch film and the hook teeth in the hook tooth group is mainly calculated based on the seed cotton flow velocity.

[0017] In this invention, the hook tooth group is divided into a left hook tooth group and a right hook tooth group. Each hook tooth group consists of several hook tooth rack arrays, and the length is slightly greater than 50% of the channel width. Each hook tooth rack can work independently. At the same time, the control area will send targeted control commands according to the location of the target mulch film, driving the left or right hook tooth rack to minimize the amount of cotton that is hooked away. Attached Figure Description

[0018] Figure 1 This is an example structural diagram of a preferred embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the workflow of the present invention;

[0020] Figure 3 This is a schematic diagram of the detection area according to a preferred embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the control area according to a preferred embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the clearing area according to a preferred embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the optical analysis module according to a preferred embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the clearing control module according to a preferred embodiment of the present invention.

[0025] Figure label:

[0026] Detection area (1), control area (2), cleaning area (3), upper reflective polarized light receiver (1-1), seed cotton main channel wall (1-2), transmitted polarized light receiver (1-3), transmitted polarized light information transmission line (1-4), seed cotton main channel (1-5), lower reflective polarized light receiver (1-6), reflected polarized light information transmission line (1-7), optical analysis module (2-1), command transmission line (2-2), cleaning control module (2-3), left hook tooth drive device (3-1), left hook tooth Group (3-2), left blocking device (3-3), right blocking device (3-4), right hook tooth group (3-5), outer wall of cleaning device (3-6), right hook tooth drive device (3-7), right plastic film brush disc (3-8), right hook tooth cleaning instruction conveying line (3-9), right plastic film collection channel (3-10), seed cotton discharge channel (3-11), seed cotton discharge channel wall (3-12), left plastic film collection channel (3-13), left hook tooth cleaning instruction conveying line (3-14), left plastic film brush disc (3-15). Implementation

[0027] The present invention will now be further described with reference to the accompanying drawings showing the preferred embodiments and workflow of the present invention. It should be noted that the detection area (1) and control area (2) of the present invention are not limited to the following example structural diagram, but can be implemented in other forms that meet the system execution requirements.

[0028] It should also be noted that the exemplary structural diagrams described in this invention are exaggerated for clarity, and the shape and size of the exemplary structures may be modified according to manufacturing techniques and / or permissible errors. Therefore, the exemplary structural diagrams of the inventive concept are not limited to the specific shapes shown in the figures, but may include other shapes that may be produced according to the manufacturing process. The areas illustrated in the figures have general characteristics and are used to illustrate specific shapes of components. Therefore, this should not be considered as limiting the scope of the inventive concept.

[0029] At the same time, it should be understood that within the control area (2) of the present invention, when the component is referred to as "connected" to another part, the component may be directly connected to the other component, or there may be an intermediate component.

[0030] It should also be understood that the example structural composition within the control area (2) of this invention is illustrated in plan view form, where the plan view is an idealized exemplary illustration. Therefore, in actual manufacturing processes, for example, deviations may exist from the illustrated shape, relative angles, and positions. Therefore, the areas shown in the figures are schematic, and their shapes are not intended to illustrate the actual shape of the area of ​​the device, nor are they intended to limit the scope of the exemplary embodiments.

[0031] Please see Figure 1 and Figure 2 As shown, Figure 1 This is an example structural diagram of the present invention; Figure 2 This is a schematic diagram of the workflow of the present invention. The detection and removal system of the present invention includes: a detection area (1), a control area (2), and a removal area (3). The detection area (1) is used to collect reflected polarized light and transmitted polarized light; the control area (2) is used to process and calculate the polarization characteristics of the polarized light and compare it with the polarization characteristics contained in the database. If there is no abnormality, the data is stored and retained. If there is an abnormality, a removal command and target coordinates are issued; the removal area (3) is used to receive the removal command and target coordinates and control the corresponding hook rack to rotate, hooking the mulch film above the collection channel. Under the action of the mulch film brush, the mulch film is detached from the hook rack and falls into the collection channel.

[0032] To further understand the structural features of the present invention, the actual execution process of the present invention will be described below. The working process of the present invention includes the following steps:

[0033] (1) Please refer to Figure 1 as well as Figure 3 As shown, and paired with Figure 2 As shown: Seed cotton reaches the detection area (1) through the main seed cotton channel (1-5). The polarized light source enters the seed cotton to generate reflected polarized light and transmitted polarized light. The upper reflected polarized light receiver (1-1), the transmitted polarized light receiver (1-3), and the lower reflected polarized light receiver (1-6) collect the reflected polarized light and transmitted polarized light. Each polarized light signal is transmitted to the optical analysis module (2-1) in the control area (2) through the transmitted polarized light information transmission line (1-4) and the reflected polarized light information transmission line (1-7).

[0034] (2) Please refer to Figure 1 , Figure 4 as well as Figure 6 As shown, and paired with Figure 2As shown: After receiving the signal, the optical analysis module (2-1) in the control area (2) processes and converts the polarization signal using the polarization signal conditioner within the optical analysis module (2-1). The polarization signal input device is responsible for summarizing the information of reflected polarized light and transmitted polarized light and inputting the information into the polarization characteristic computer. The polarization characteristic computer analyzes the acquired polarization characteristic signal and compares it with the database information, displaying the results on the polarization characteristic display. During this process, if there are no abnormalities, the computer stores the data in the database; if there are abnormalities, the polarization characteristic computer in the optical analysis module (2-1) will determine the location of the polarization effect concentration based on the optical characteristic information and obtain the coordinates of the target ground film location. If the target mulch film is located in the left half or middle of the channel, the coordinates of the location and the removal command are sent as control signals to the removal control module (2-3), which will then drive the rack of the corresponding left hook tooth group (3-2) to rotate. If the target mulch film is located in the right half of the channel, the coordinates of the location and the removal command are sent as control signals to the removal control module (2-3), which will then drive the rack of the corresponding right hook tooth group (3-5) to rotate. If the target mulch film is distributed in both the left and right halves of the channel, the coordinates of the location and the removal command are sent as control signals to the removal control module (2-3), which will then simultaneously drive the racks of the corresponding left hook tooth group (3-2) and right hook tooth group (3-5) to rotate.

[0035] (3) Please refer to Figure 4 , Figure 6 as well as Figure 7 As shown, and paired with Figure 2 As shown: When the optical analysis module (2-1) detects an anomaly, it will send a control signal to the clearing control module (2-3) through the command transmission line (2-2). The control signal is converted into a clearing signal by the control signal conversion device. The clearing signal is processed into a clearing command by the conditioner and output by the clearing control module.

[0036] (4) Please refer to Figure 1 as well as Figure 5 As shown, and paired with Figure 2 As shown: The cleaning control module (2-3) sends a cleaning command to the left hook tooth drive device (3-1) or / and the right hook tooth drive device (3-7) via the left hook tooth cleaning command transmission line (3-14) and / or the right hook tooth cleaning command transmission line (3-9). Then, the corresponding hook teeth in the left hook tooth group (3-2) or / and the right hook tooth group (3-5) rotate, hooking the target mulch film into the mulch film brush. Under the action of the mulch film brush, the target mulch film falls into the left collection channel (3-13) or / and the right collection channel (3-10), thus completing the mulch film cleaning process.

[0037] Specifically, such as Figure 3As shown, the upper reflective polarized light receiver (1-1), the seed cotton main channel wall (1-2), the transmission polarized light receiver (1-3), the transmission polarized light information transmission line (1-4), the seed cotton main channel (1-5), the lower reflective polarized light receiver (1-6), and the reflective polarized light information transmission line (1-7) are set in the detection area (1).

[0038] Specifically, such as Figure 4 As shown, the optical analysis module (2-1), the command transmission line (2-2), and the clearing control module (2-3) are located in the control area (2).

[0039] Specifically, such as Figure 5 As shown, the left hook tooth drive device (3-1), left hook tooth group (3-2), left blocking device (3-3), right blocking device (3-4), right hook tooth group (3-5), outer wall of the cleaning device (3-6), right hook tooth drive device (3-7), right plastic film brush (3-8), right hook tooth cleaning instruction conveying line (3-9), right plastic film collection channel (3-10), seed cotton discharge channel (3-11), seed cotton discharge channel wall (3-12), left plastic film collection channel (3-13), left hook tooth cleaning instruction conveying line (3-14), and left plastic film brush (3-15) are set in the cleaning area (3).

[0040] Specifically, such as Figure 6 As shown, the polarization signal input device, polarization signal conditioner, polarization feature display, and polarization feature computer are located within the optical analysis module (2-1). The reflected polarization signal and the transmitted polarization signal are transmitted to the polarization signal conditioner via the transmitted polarization light information transmission line (1-4) and the reflected polarization light information transmission line (1-7). The polarization signal conditioner is connected to the polarization feature computer, which is connected to the polarization feature display. Control signals are output from the polarization feature computer.

[0041] Specifically, such as Figure 7 As shown, the control signal conversion device and the clearing signal conditioner are installed in the clearing control module (2-3). The control signal from the computer is received by the control signal conversion device, which is connected to the clearing signal conditioner. The clearing signal conditioner is connected to the left hook tooth drive device (3-1) and the right hook tooth drive device (3-7) respectively through the left hook tooth clearing command transmission line (3-14) and / or the right hook tooth clearing command transmission line (3-9).

[0042] The present invention has the following implementation and technical effects:

[0043] Firstly, the present invention provides a plastic film detection and hook-tooth removal system, comprising a detection area (1), a control area (2), and a removal area (3). The detection area (1) is used to collect reflected polarized light and transmitted polarized light; the control area (2) is used to process and analyze the polarization characteristics of the polarized light and compare it with the polarization characteristics contained in the database. If there is no abnormality, the data is stored and retained; if there is an abnormality, a removal command and target coordinates are issued; the removal area (3) is used to receive the removal command and target coordinates and control the corresponding hook-tooth rack to rotate, hooking the plastic film above the collection channel. Under the action of the plastic film brush, the plastic film is detached from the hook-tooth rack and falls into the collection channel.

[0044] Secondly, the plastic film detection and hook-tooth removal system provided by this invention, in terms of plastic film detection, is based on the different effects of plastic film and seed cotton on linearly polarized light. The optical analysis module (2-1) analyzes the received polarization characteristics to determine whether plastic film is present. In terms of plastic film detection, it is freed from image processing, which reduces the cost of instruments and further enhances the efficiency of detection and removal.

[0045] Thirdly, the automated seed cotton mulch film detection and removal system provided by this invention addresses the issue of high impurity content and diverse types of impurities in machine-harvested seed cotton. By combining the actual impurity content and types of impurities, a hook-tooth assembly is used as the actuating element. A mulch film brush disc separates the mulch film from the hook teeth, achieving integrated detection and removal while ensuring effective removal and interference resistance in the removal area. This effectively reduces repetitive manual actions and further lowers labor costs.

Claims

1. A system for detecting and removing plastic film from cotton seeds, characterized in that, The system includes: The detection area (1) includes an upper reflective polarized light receiver (1-1), a seed cotton main channel wall (1-2), a transmitted polarized light receiver (1-3), a transmitted polarized light information transmission line (1-4), a seed cotton main channel (1-5), a lower reflective polarized light receiver (1-6), and a reflective polarized light information transmission line (1-7). The control area (2) includes an optical analysis module (2-1), an instruction delivery line (2-2), and a clearing control module (2-3). The cleaning area (3), located below the detection area (1), includes a left hook tooth drive device (3-1), a left hook tooth group (3-2), a left blocking device (3-3), a right blocking device (3-4), a right hook tooth group (3-5), the outer wall of the cleaning device (3-6), a right hook tooth drive device (3-7), a right plastic film brush (3-8), a right hook tooth cleaning instruction conveying line (3-9), a right plastic film collection channel (3-10), a seed cotton discharge channel (3-11), a seed cotton discharge channel wall (3-12), a left plastic film collection channel (3-13), a left hook tooth cleaning instruction conveying line (3-14), and a left plastic film brush (3-15). In the detection area (1), the reflected polarized light information transmission line (1-7) is connected to the upper reflected polarized light receiver (1-1) and the lower reflected polarized light receiver (1-6), which are distributed on both sides of the polarized light source; the transmitted polarized light receiver (1-3) is located on the right side of the seed cotton main channel (1-5), and the upper reflected polarized light receiver (1-1) and the lower reflected polarized light receiver (1-6) are located on the left side of the seed cotton main channel (1-5); the transmitted polarized light receiver (1-3) is connected to the transmitted polarized light information transmission line (1-4); In the control area (2), the command transmission line (2-2) connects the optical analysis module (2-1) and the clearing control module (2-3). The optical analysis module (2-1) is connected to the reflected polarized light information transmission line (1-7) and the transmitted polarized light information transmission line (1-4). In the cleaning area (3), the left hook tooth drive device (3-1) and the right hook tooth drive device (3-7) are connected to the outside of the outer wall (3-6) of the cleaning device. The left hook tooth drive device (3-1) is connected to the left hook tooth cleaning instruction conveying line (3-14), and the right hook tooth drive device (3-7) is connected to the right hook tooth cleaning instruction conveying line (3-9). The left blocking device (3-3) and the right blocking device (3-4) are connected to the inside of the outer wall (3-6) of the cleaning device. The left hook tooth group (3-2) and the left plastic film brush (3-15) are installed in the left plastic film collection channel (3-13). Above the right mulch film collection channel (3-10), the right hook tooth group (3-5) and the right mulch film brush disc (3-8) are installed above the right mulch film collection channel (3-10); the left blocking device (3-3) is located above the left hook tooth group (3-2), and the left mulch film brush disc (3-15) is located below the left hook tooth group (3-2); the right blocking device (3-4) is located above the left hook tooth group (3-2), and the right mulch film brush disc (3-8) is located below the right hook tooth group (3-5); the left and right hook tooth groups can rotate to hook the mulch film above the corresponding collection channel, and the mulch film is detached from the hook tooth group under the action of the mulch film brush disc and falls into the corresponding collection channel; The seed cotton discharge channel (3-11) is composed of the seed cotton discharge channel wall (3-12) and is located between the left plastic film collection channel (3-13) and the right plastic film collection channel (3-10); the other end of the left hook tooth removal command conveyor line (3-14) and the right hook tooth removal command conveyor line (3-9) are connected to the removal control module (2-3).

2. The mulch film detection and tine-type removal system according to claim 1, characterized in that, The detection area (1) is used to collect reflected polarized light and transmitted polarized light; The upper reflective polarized light receiver (1-1), the transmission polarized light receiver (1-3), and the lower reflective polarized light receiver (1-6) are used to receive reflected and transmitted polarized light. The seed cotton main channel wall (1-2) is used to form the seed cotton main channel (1-5). The transmitted polarized light information transmission line (1-4) and the reflected polarized light information transmission line (1-7) are used to transmit transmitted and reflected polarized light information. The main channels for seed cotton (1-5) are used to restrict the movement trajectory of seed cotton containing plastic film.

3. The plastic film detection and hook-tooth removal system according to claim 1, characterized in that, The control area (2) is used to process and calculate the polarization characteristics of polarized light and compare them with the polarization characteristics contained in the database. If there is no abnormality, the data is stored and retained. If there is an abnormality, a clearing command and target coordinates are issued. The optical analysis module (2-1) consists of a polarization signal conditioner, a polarization signal input device, a polarization feature computer, and a polarization feature display. It converts, processes, summarizes, analyzes, and displays the polarization light feature information of the detection area (1). The instruction transmission line (2-2) is used to transmit instructions from the optical analysis module (2-1) to the clearing control module (2-3). The clearing control module (2-3) consists of a control signal conversion device and a clearing signal conditioner. It is used to receive control signals from the optical analysis module (2-1) and convert, process and output the signals to the clearing area (3).

4. The mulch film detection and tine weeding system of claim 1, wherein, The clearing area (3) is used to receive clearing instructions and location coordinates and control the rotation of the corresponding hook tooth group to hook the mulch film above the collection channel. The mulch film is detached from the hook tooth group under the action of the mulch film brush and falls into the collection channel. The left hook tooth drive device (3-1) and the right hook tooth drive device (3-7) are used to receive the clearing command from the control area (2) and drive the hook tooth group to rotate. The left hook tooth group (3-2) and the right hook tooth group (3-5) are both arranged by several hook tooth arrays, which can work independently and have a length slightly greater than 50% of the channel width, and are used to directly remove the target mulch film; The left blocking device (3-3) and the right blocking device (3-4) are both composed of two long brushes and a frame, used to block the seed cotton and prevent the seed cotton from entering the hook tooth area. The outer wall (3-6) of the cleaning device is used to protect the internal structure and form the outer wall of the right mulch film collection channel (3-10) and the left mulch film collection channel (3-13); The right mulch film brush disc (3-8) and the left mulch film brush disc (3-15) are both composed of a base plate and a plastic brush, located above the collection channel, and are used to separate the hook toothed strip from the target mulch film so that the mulch film falls into the collection channel. The right hook tooth clearing command transmission line (3-9) and the left hook tooth clearing command transmission line (3-14) are respectively used to transmit the clearing command and target coordinates from the control area (2) to the right hook tooth drive device (3-7) and the left hook tooth drive device (3-1). The right mulch film collection channel (3-10) and the left mulch film collection channel (3-13) are used to collect the target mulch film removed by the right hook tooth group (3-5) and the left hook tooth group (3-2), respectively. The seed cotton discharge channel (3-11) is used to transport the seed cotton after the plastic film has been removed to other areas; The seed cotton discharge channel wall (3-12) is used to form the seed cotton discharge channel (3-11) and simultaneously form the inner wall of the right mulch film collection channel (3-10) and the left mulch film collection channel (3-13).

5. The mulch detection and tine weeding system of claim 4, wherein, The work process includes the following steps: (1) The upper reflective polarized light receiver (1-1), the transmission polarized light receiver (1-3), and the lower reflective polarized light receiver (1-6) receive reflected polarized light and transmission polarized light. The polarization information is transmitted to the optical analysis module (2-1) of the control area (2) through the transmission polarized light information transmission line (1-4) and the reflection polarized light information transmission line (1-7). (2) The polarization signal conditioner in the optical analysis module (2-1) is responsible for conditioning and converting the polarization characteristic signal. The polarization signal input device is responsible for summarizing the conditioned reflected polarized light and transmitted polarized light information and inputting it into the polarization characteristic computer. The polarization characteristic computer is responsible for receiving the processed signal, analyzing the polarization characteristic information of reflected and transmitted polarized light, and displaying the statistical data on the polarization characteristic display. During the analysis process of the polarization characteristic computer, the obtained polarization characteristic information will be compared with the polarization characteristic information contained in the database. (3) If there is no abnormality during the comparison process, the data is saved and the following steps are not performed; if there is an abnormality, the polarization feature computer in the optical analysis module (2-1) will determine the location of the polarization effect concentration based on the optical feature information: if the target film is located in the left half or middle of the channel, the removal command and the location coordinates are sent to the removal control module (2-3) as control signals, and the corresponding left hook tooth group (3-2) will be driven to rotate; if the target film is located in the right half of the channel, the location coordinates and the removal command are sent to the removal control module (2-3) as control signals, and the corresponding right hook tooth group (3-5) will be driven to rotate; if the target film is distributed in both the left and right parts of the channel, the location coordinates and the removal command are sent to the removal control module (2-3) as control signals, and the corresponding left hook tooth group (3-2) and right hook tooth group (3-5) will be driven to rotate simultaneously. (4) After an abnormality occurs, the optical analysis module (2-1) sends a control command and target coordinates to the clearing control module (2-3) through the command transmission line (2-2). The clearing control module (2-3) converts and conditions the control signal and sends a clearing command to the left hook tooth drive device (3-1) and / or the right hook tooth drive device (3-7). (5) The hook teeth of the corresponding hook teeth group rotate to hook the plastic film and bring it to the top of the corresponding collection channel; (6) The plastic film is detached from the hook and toothed rack under the action of the right plastic film brush plate (3-8) and / or the left plastic film brush plate (3-15) and falls into the collection channel, thus completing the work.

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