Winnowing conveying control method and conveying equipment

Abstract

The embodiment of the invention discloses a winnowing conveying control method and conveying equipment, belongs to the technical field of plastic winnowing, and solves the problem that the overall efficiency of a winnowing machine is low during existing plastic winnowing. Images of materials to be selected on the conveying belt are obtained, and distribution information of plastics to be selected is determined based on pixel point information corresponding to the images of the materials to be selected; based on the distribution information of the to-be-selected plastics, determining the winnowing areas to which the plastics belong, and based on the plastic proportions corresponding to the winnowing areas, determining to-be-adjusted air ports in the winnowing machine; determining a reference tuyere associated with the to-be-adjusted tuyere, and constructing a parameter regulation and control function based on to-be-selected plastic data corresponding to the reference tuyere; outputting the air speed and the air outlet angle corresponding to the reference air port based on the parameter regulation and control function so as to regulate and control the to-be-regulated air port; and on the basis of the adjusted winnowing machine, winnowing is conducted on the to-be-selected plastic, plastic component detection is conducted on the winnowed material, and secondary regulation and control are conducted on the winnowing machine on the basis of the detection result.

Description

Technical Field

[0001] The present application relates to the technical field of air separation of plastics, and in particular to a control method and conveying equipment for air separation conveying. Background Art

[0002] In the field of plastic recycling and processing, air separators are widely used in the classification and screening of plastics as an efficient material separation device. The working principle of traditional air separators mainly relies on the power of airflow. By adjusting the wind speed and air outlet angle of the air outlet, plastic materials of different weights, shapes and materials are separated. In this process, the conveyor belt first spreads the plastic materials to be selected evenly and transports them to the air separation area. Then, the air separator releases airflow of specific intensity and direction through the preset air outlet to blow the materials, so that plastics with different characteristics are directed to different collection areas due to different forces.

[0003] However, the existing air separators face a significant problem in actual operation: the distribution of the plastic materials to be selected is often uneven, and the material properties such as density and shape vary greatly, resulting in extremely uneven workloads of the air outlets during the air separation process. Specifically, although some air outlets process less material, they still release a strong airflow, while some air outlets are overloaded due to processing too much or too heavy material, resulting in increased energy consumption of the equipment and reduced overall efficiency of the air separator. Summary of the invention

[0004] The embodiments of the present application provide a control method and conveying equipment for air separation conveying, which are used to solve the following technical problems: in the prior art, although some air outlets process less material, they still release airflow with greater intensity, while some air outlets are overloaded due to processing too much or too heavy material, resulting in increased energy consumption of the equipment and reduced overall efficiency of the air separator.

[0005] The present application embodiment adopts the following technical solutions:

[0006] The embodiment of the present application provides a control method for air selection and conveying. The method comprises: obtaining an image of a material to be selected on a conveyor belt, determining distribution information of plastics to be selected based on pixel information corresponding to the image of the material to be selected; determining the air selection area to which it belongs based on the distribution information of the plastics to be selected, and determining the air outlet to be adjusted on the air selector based on the plastic proportions corresponding to each air selection area; determining a reference air outlet associated with the air outlet to be adjusted, and constructing a parameter control function based on the plastic data to be selected corresponding to the reference air outlet; outputting the wind speed and air outlet angle corresponding to the reference air outlet based on the parameter control function, and regulating the air outlet to be adjusted based on the wind speed and the air outlet angle; air selecting the plastics to be selected based on the adjusted air selector, and performing plastic composition detection on the air selected material, and performing secondary control on the air selector based on the detection results.

[0007] The embodiments of the present application use image processing technology to obtain information about materials to be selected in real time, avoid errors and delays caused by manual intervention, and improve the accuracy and efficiency of data acquisition. By analyzing the proportion of plastics in different areas, the areas that need to be adjusted are identified, so that the air outlets can be adjusted in a targeted manner to optimize the air selection effect. Through correlation analysis, other air outlets that affect the effect of the air outlets to be adjusted are identified, and the data of these air outlets are used to construct a control function to achieve a more accurate control strategy. Through the parameter control function, the optimal wind speed and air outlet angle are calculated to achieve precise control of the air outlets to be adjusted, improve the efficiency and quality of air selection, balance the air selection task volume of each air outlet, and improve the overall performance of the air separator. Secondary control based on the test results can further optimize the performance of the air separator, improve the accuracy and efficiency of sorting, and form a closed-loop optimization process.

[0008] In one implementation of the present application, an image of the material to be selected on a conveyor belt is obtained, and distribution information of the plastic to be selected is determined based on pixel information corresponding to the image of the material to be selected, specifically including: determining each pixel in the output tensor corresponding to the image of the material to be selected, and determining the material category corresponding to each pixel based on the probability of the material category corresponding to each pixel; dividing adjacent pixels of the same material category to obtain pixel sets corresponding to different materials to be selected; in the pixel set, determining a reference pixel set belonging to the plastic category to obtain an image area of ​​the plastic to be selected based on the reference pixel set; marking the image area of ​​the plastic to be selected in the image of the material to be selected, and inputting the marked image into a recurrent neural network to determine the conveying order and conveying time correlation of the plastic to be selected on the conveyor belt through the recurrent neural network; obtaining the distribution information of the plastic to be selected based on the conveying order, conveying time correlation and the area of ​​the image area of ​​the plastic to be selected.

[0009] In one implementation of the present application, after determining the distribution information of the plastic to be selected based on the pixel point information corresponding to the image of the material to be selected, the method also includes: determining the shape of the plastic to be selected based on the distribution information of the plastic to be selected; dividing the plastics to be selected of the same shape into the same set to determine the plastic shape distribution information based on the number of plastics to be selected in each set; comparing the plastic shape distribution information with the plastic shape distribution information in a preset shape distribution table to obtain the air separator control coefficient corresponding to the reference plastic shape distribution information with the highest similarity; wherein the preset shape distribution table includes multiple reference plastic shape distribution information, and also includes air separator control coefficients corresponding to multiple reference plastic shape distribution information respectively.

[0010] In one implementation of the present application, based on the distribution information of the plastics to be selected, the air selection area to which it belongs is determined, and based on the distribution ratio corresponding to each air selection area, the air outlet to be adjusted on the air separator is determined, specifically including: based on the distribution information of the plastics to be selected, the placement area of ​​each plastic to be selected on the conveyor belt is determined; based on the number of air outlets corresponding to the air separator, the conveyor belt is divided into multiple air selection areas; based on the placement areas corresponding to each plastic to be selected, the plastic proportions corresponding to the multiple air selection areas are obtained; the plastic proportions corresponding to each air selection area are compared with a preset proportion threshold value, and when the plastic proportion is greater than the preset proportion threshold value, the air separator outlet corresponding to the air selection area is used as the air outlet to be adjusted.

[0011] In one implementation of the present application, a reference air outlet that is associated with the air outlet to be adjusted is determined, and a parameter control function is constructed based on the data of the plastic to be selected corresponding to the reference air outlet, which specifically includes: determining the reference air outlet adjacent to the air outlet to be adjusted, and obtaining the plastic proportion corresponding to the reference air outlet, so as to determine the proportion of adjustable plastics based on the difference between the plastic proportion and a preset proportion threshold; and, obtaining the placement area of ​​the plastic to be selected corresponding to the reference air outlet, so as to determine the air selection distance between the placement area and the air selection area of ​​the air outlet to be adjusted based on the placement area; and, based on the placement area of ​​the plastic to be selected corresponding to the reference air outlet, determining the plastic to be selected in a stacked state, and obtaining the plastic stacking distribution data based on the number of the plastic to be selected in the stacked state and the area of ​​the stacking area; and constructing a parameter control function based on the adjustable plastic proportion, the air selection distance and the plastic stacking distribution data.

[0012] In one implementation of the present application, a parameter control function is constructed based on the adjustable plastic proportion, distance and plastic accumulation distribution data, specifically including: the constructed wind speed control function is:

[0013]

[0014] The constructed air outlet angle control function is:

[0015]

[0016] Based on the wind speed control function and the wind outlet angle control function, a parameter control function is obtained, and the reference air outlet is controlled based on the output value of the parameter control function, wherein c is the wind speed of the reference air outlet; θ is the wind direction angle of the reference air outlet; p is the proportion of adjustable plastics; d is the wind selection distance; s is the plastic accumulation distribution data; v0 is the initial wind speed of the reference air outlet; θ0 is the initial wind direction angle of the reference air outlet; k1 is the first weight; k2 is the second weight; k3 is the third weight; k4 is the fourth weight; k5 is the fifth weight; k6 is the sixth weight; k7 is the seventh weight; k8 is the eighth weight; s d is the average bulk density of the selected plastics in a stacked state; sa is the area of ​​the accumulation region; is the first noise term; is the second noise term.

[0017] In one implementation of the present application, after constructing the parameter control function, the method also includes: determining the coefficient type of the air separator control coefficient; wherein the coefficient type includes speed type and angle type; adjusting the wind speed control function based on the control coefficient corresponding to the speed type; and adjusting the air outlet angle control function based on the control coefficient corresponding to the angle type.

[0018] In one implementation of the present application, the plastic component of the material after air selection is detected, so as to perform secondary control on the air separator based on the detection result, specifically including: performing random inspection on the impurity collection area after air selection, so as to obtain the plastic content based on the random inspection result; when the plastic content does not meet the preset content condition, inputting the plastic sample image in the impurity collection area into a preset plastic classification model, so as to output the plastic category corresponding to the impurity collection area based on the preset plastic classification model; determining the number of plastics corresponding to different plastic categories in the impurity area, so as to determine the category of plastic to be processed based on the number; determining the air outlet control data corresponding to the plastic category to be processed in the preset plastic information database, so as to perform secondary control on the air separator based on the air outlet control data.

[0019] In one implementation of the present application, a secondary control is performed on the air separator based on air outlet control data, specifically including: determining the wind speed difference and the angle difference according to the current air outlet data and the air outlet control data corresponding to the type of plastic to be processed; wherein the air outlet control data includes different air outlet speeds and different air outlet angles; adjusting each air outlet of the air separator based on the wind speed difference and the angle difference; re-sampling the impurity collection area after a preset time interval, and when the plastic content of the sampled plastic does not meet the preset content condition, selecting a new air outlet speed and a new air outlet angle from the air outlet control data to re-regulate the air separator; wherein the new air outlet speed is greater than the previously selected air outlet speed, and the new air outlet angle is greater than the previously selected air outlet angle.

[0020] An embodiment of the present application provides a wind selection and conveying device, which consists of a wind selection channel, a bracket, and a wind selection machine casing, and is characterized in that the device also includes: a conveyor belt, which is evenly divided into multiple wind selection areas along its width direction, and the conveyor belt is used to convey the material to be selected; an image monitoring device, which is arranged on the wind selection box, and the image monitoring device is used to obtain the image of the material to be selected on the conveyor belt; the wind selection box is arranged on the side of the image monitoring device facing the discharge direction of the conveyor belt, the top of the wind selection box is connected to the wind selection channel, and the bottom is provided with mounting holes corresponding to each wind selection area; a retractable air outlet, including an air duct that can be retractably installed in the mounting hole, and the upper end of the air duct is connected to the inner side of the wind selection box; a driving member, which can drive the air duct to move up and down.

[0021] At least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects: The embodiments of the present application obtain the information of the materials to be selected in real time through image processing technology, thus avoiding the errors and delays caused by manual intervention and improving the accuracy and efficiency of data acquisition. By analyzing the proportion of plastics in different areas, the areas that need to be adjusted are identified, so that the air outlets can be adjusted in a targeted manner to optimize the air selection effect. Through correlation analysis, other air outlets that affect the effect of the air outlets to be adjusted are identified, and the data of these air outlets are used to construct a control function to achieve a more accurate control strategy. Through the parameter control function, the optimal wind speed and air outlet angle are calculated to achieve precise control of the air outlets to be adjusted, improve the efficiency and quality of air selection, balance the air selection task volume of each air outlet, and improve the overall performance of the air separator. Secondary control based on the test results can further optimize the performance of the air separator, improve the accuracy and efficiency of sorting, and form a closed-loop optimization process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. In the drawings:

[0023] Figure 1 A flow chart of a control method for air separation and conveying provided in an embodiment of the present application;

[0024] Figure 2 A front schematic diagram of an air separation and conveying device provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the back side of a wind selection and conveying device provided in an embodiment of the present application;

[0026] Figure 4A side schematic diagram of an air separation and conveying equipment provided in an embodiment of the present application.

[0027] Reference numerals:

[0028] 101 winnowing channel, 102 image monitoring device, 103 winnowing box, 104 driving member, 105 retractable air outlet, 106 mounting hole, 107 bracket, 108 air outlet, 109 transmission belt, 110 winnowing machine housing. DETAILED DESCRIPTION

[0029] The embodiments of the present application provide a control method and conveying equipment for air separation conveying.

[0030] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0031] Figure 1 A flow chart of a control method for air separation and conveying provided in an embodiment of the present application, such as Figure 1 As shown, the control method of air selection conveying includes the following steps:

[0032] Step 101: Acquire an image of a material to be selected on a conveyor belt, and determine distribution information of plastics to be selected based on pixel information corresponding to the image of the material to be selected.

[0033] In one implementation of the present application, each pixel point in the output tensor corresponding to the image of the material to be selected is determined, and based on the probability of the material category corresponding to each pixel point, the material category corresponding to each pixel point is determined. Adjacent pixels of the same material category are divided to obtain pixel point sets corresponding to different materials to be selected. In the pixel point set, a reference pixel point set belonging to the plastic category is determined to obtain the image area of ​​the plastic to be selected based on the reference pixel point set. The image area of ​​the plastic to be selected is marked in the image of the material to be selected, and the marked image is input into a recurrent neural network to determine the conveying order and conveying time correlation of the plastic to be selected on the conveyor belt through the recurrent neural network. Based on the conveying order, conveying time correlation and the area of ​​the image area of ​​the plastic to be selected, the distribution information of the plastic to be selected is obtained.

[0034] Specifically, firstly, an image of the material to be selected on the conveyor belt is obtained, and an output tensor is generated. The output tensor is a digital representation of the image, which contains information about each pixel in the image. For each pixel in the output tensor, the system calculates the probability that the pixel belongs to different material categories based on a pre-trained model, such as a convolutional neural network, and assigns a most likely material category to each pixel based on these probabilities. The training process of the convolutional neural network is to take a preset image pixel sample as input, take the pixel category corresponding to the input sample as output, train the preset model, and obtain the convolutional neural network when the training result meets the requirements.

[0035] Furthermore, adjacent pixels belonging to the same material category are divided into a set, so that each set represents the area of ​​a specific material in the image. Among the multiple sets obtained, a pixel set of the plastic category is determined, and this plastic category set is the reference pixel set. The area corresponding to the reference pixel set is marked on the original image, that is, the plastic image area to be selected, so that it can be intuitively seen which parts are plastic materials.

[0036] Furthermore, the annotated image is input into a recurrent neural network. In the embodiment of the present application, the recurrent neural network is used to analyze the correlation between the conveying order and conveying time of plastic materials on the conveyor belt. Specifically, the recurrent neural network analyzes the plastic materials in the image, and determines the correlation between their conveying order and conveying time according to their position, shape and possible movement mode on the conveyor belt. At the same time, the embodiment of the present application also calculates the area of ​​each plastic image area to be selected, so as to determine the quantity and scale of the material. Finally, the distribution information of the plastic to be selected is generated by comprehensively considering the conveying order, conveying time correlation and area information. The distribution information in the embodiment of the present application is a specific report, which includes information such as the specific position, quantity, and expected arrival time of the plastic material on the conveyor belt.

[0037] In one implementation of the present application, the shape of the plastic to be selected is determined based on the distribution information of the plastic to be selected. The plastics to be selected of the same shape are divided into the same set, so as to determine the plastic shape distribution information based on the number of plastics to be selected in each set. The plastic shape distribution information is compared with the plastic shape distribution information in the preset shape distribution table to obtain the air separator control coefficient corresponding to the reference plastic shape distribution information with the highest similarity, wherein the preset shape distribution table includes a plurality of reference plastic shape distribution information, and also includes the air separator control coefficients corresponding to the plurality of reference plastic shape distribution information.

[0038] Specifically, based on the obtained distribution information of the selected plastics, including position, quantity, area, etc., the shape characteristics of each selected plastic are further analyzed. The embodiment of the present application obtains an accurate shape description of each selected plastic through image processing technology, such as edge detection. The selected plastics with the same shape are divided into the same set, that is, if the shape characteristics of two or more selected plastics are similar or matching, they will be classified into one category. For each shape set, the number of selected plastics therein is calculated to obtain the plastic shape distribution information.

[0039] Furthermore, the embodiment of the present application is provided with a preset shape distribution table, which contains a plurality of reference plastic shape distribution information and their corresponding air separator control coefficients. The currently obtained plastic shape distribution information is compared with the reference information in the preset table to find the match with the highest similarity. After determining the reference plastic shape distribution information with the highest similarity, the air separator control coefficient corresponding to the information is selected. This coefficient will be used to adjust the air separator settings of the air separator to optimize the separation effect of plastics of a specific shape.

[0040] Step 102: Based on the distribution information of the plastics to be selected, determine the air selection area to which it belongs, and determine the air outlet to be adjusted on the air separator based on the plastic proportion corresponding to each air selection area.

[0041] In one implementation of the present application, based on the distribution information of the plastics to be selected, the placement area of ​​each plastic to be selected on the conveyor belt is determined. Based on the number of air outlets corresponding to the air separator, the conveyor belt is divided into multiple air separation areas. Based on the placement areas corresponding to each plastic to be selected, the plastic proportions corresponding to the multiple air separation areas are obtained. The plastic proportions corresponding to each air separation area are compared with a preset proportion threshold. When the plastic proportion is greater than the preset proportion threshold, the air separator outlet corresponding to the air separation area is used as the air outlet to be adjusted.

[0042] Specifically, according to the obtained distribution information of the selected plastics, the specific placement area of ​​each selected plastic on the conveyor belt can be determined. According to the number of air outlets corresponding to the air separator, the conveyor belt is divided into multiple air selection areas. Each air selection area corresponds to one or more air outlets, which are responsible for air selection of the plastics in the area.

[0043] Furthermore, for each wind selection area, the proportion of the plastic to be selected in the area is calculated. The embodiment of the present application achieves this by counting the number or area of ​​the plastic in the area, and then dividing it by the area or number of the entire wind selection area to obtain the plastic proportion. The plastic proportion of each wind selection area is compared with a preset proportion threshold. This threshold is pre-set based on factors such as the performance of the wind separator, the physical properties of the plastic, and the expected separation effect. If the plastic proportion in a certain wind selection area exceeds this threshold, it means that there is too much plastic in the area, and additional wind power or a more sophisticated wind selection strategy may be required to ensure the separation effect.

[0044] Furthermore, when the proportion of plastic is greater than the preset proportion threshold, the air separator port corresponding to the air separation area is used as the air outlet to be adjusted. That is, the wind speed, wind direction or other parameters of these air outlets need to be adjusted to optimize the separation effect of the plastic in the area.

[0045] Step 103: determine a reference tuyere that is associated with the tuyere to be adjusted, and construct a parameter control function based on the candidate plastic data corresponding to the reference tuyere.

[0046] In one implementation of the present application, a reference air outlet adjacent to the air outlet to be adjusted is determined, and the plastic proportion corresponding to the reference air outlet is obtained, so as to determine the proportion of adjustable plastics based on the difference between the plastic proportion and the preset proportion threshold. Also, the placement area of ​​the selected plastic corresponding to the reference air outlet is obtained, so as to determine the air selection distance between the placement area and the air selection area of ​​the air outlet to be adjusted based on the placement area. Also, based on the placement area of ​​the selected plastic corresponding to the reference air outlet, the selected plastic in a stacked state is determined, and the plastic stacking distribution data is obtained based on the number of the selected plastics in the stacked state and the area of ​​the stacking area. A parameter control function is constructed based on the adjustable plastic proportion, the air selection distance, and the plastic stacking distribution data.

[0047] Specifically, after determining the air outlet to be adjusted, determine other air outlets adjacent to the air outlet. These air outlets are called reference air outlets. When the workload of the reference air outlet does not exceed the range, for each reference air outlet, obtain its corresponding plastic ratio, that is, the ratio of the number or area of ​​plastics in the air selection area where the air outlet is located to the total area of ​​the area. Calculate the difference between the reference air outlet plastic ratio and the preset ratio threshold. This difference reflects the degree of excess or shortage of plastics in the air selection area where the air outlet is located. Based on this difference, determine the adjustable plastic ratio, that is, the air outlet can be adjusted to accommodate the number of plastics in other areas without affecting the separation effect of the current area.

[0048] Furthermore, the placement area of ​​the selected plastics corresponding to the reference air outlet is obtained, and the distance between these areas and the wind selection area of ​​the air outlet to be adjusted is calculated. This distance is called the wind selection distance, which affects the attenuation and diffusion of wind force during the transmission process. For the placement area corresponding to the reference air outlet, the selected plastics in the stacked state are identified, that is, plastics piled together due to excessive quantity or irregular shape, and the number of plastics in the stacked state and the area of ​​the stacking area are calculated to obtain the plastic stacking distribution data. These data reflect the distribution of plastics on the conveyor belt. Based on the proportion of adjustable plastics, wind selection distance and plastic stacking distribution data, a parameter control function is constructed.

[0049] In one implementation of the present application, the constructed wind speed control function is:

[0050]

[0051] The constructed air outlet angle control function is:

[0052]

[0053] Based on the wind speed control function and the wind outlet angle control function, a parameter control function is obtained, and the reference air outlet is controlled based on the output value of the parameter control function.

[0054] Wherein, c is the wind speed of the reference vent; θ is the wind direction angle of the reference vent; p is the proportion of adjustable plastics; d is the wind selection distance; s is the plastic accumulation distribution data; v0 is the initial wind speed of the reference vent; θ0 is the initial wind direction angle of the reference vent; k1 is the first weight; k2 is the second weight; k3 is the third weight; k4 is the fourth weight; k5 is the fifth weight; k6 is the sixth weight; k7 is the seventh weight; k8 is the eighth weight; s d is the average bulk density of the selected plastics in the bulk state; s a is the area of ​​the accumulation region; is the first noise term; is the second noise term.

[0055] In addition to being able to adjust the plastic proportion and the wind selection distance, the embodiment of the present application introduces the stacking density and stacking area of ​​the selected plastics in a stacked state, taking the state of the materials into more comprehensive consideration. d The larger it is, the denser the accumulation is, and a higher wind speed is needed to break up the accumulation to ensure effective wind selection, so its coefficient k3 is positive. aThe larger the distance, the larger the airflow adjustment is needed, so its coefficient k4 is positive. When adjusting the wind speed and wind direction, the impact on the large accumulation area must be considered. In the wind speed control function, the distance d is taken as the inverse. This is because the closer the reference outlet is, the greater the impact on the outlet to be adjusted. Therefore, when adjusting the wind speed, the influence of the closer reference outlet is more significant.

[0056] Step 104: Output the wind speed and wind outlet angle corresponding to the reference air outlet based on the parameter control function, so as to control the air outlet to be adjusted based on the wind speed and wind outlet angle.

[0057] In one implementation of the present application, the coefficient type of the air selector control coefficient is determined; wherein the coefficient type includes a speed type and an angle type. Based on the control coefficient corresponding to the speed type, the wind speed control function is adjusted. Based on the control coefficient corresponding to the angle type, the air outlet angle control function is adjusted.

[0058] Specifically, the speed type control coefficient in the embodiment of the present application refers to a coefficient for adjusting the speed of the air separator. The wind speed control function can be adjusted by this coefficient to achieve precise control of the output wind speed of the air separator. For example, the coefficient can be multiplied by the wind speed control function. The angle type control coefficient in the embodiment of the present application refers to a coefficient for adjusting the angle of the air separator. The angle control function can be adjusted by this coefficient to achieve precise control of the output angle of the air separator. For example, the coefficient can be multiplied by the angle control function.

[0059] Step 105: Based on the adjusted air separator, the plastic to be selected is air-separated, and the plastic composition of the air-separated material is tested, so as to perform secondary regulation on the air separator based on the test results.

[0060] In one implementation of the present application, a random inspection is performed on the impurity collection area after air separation to obtain the plastic content based on the random inspection results. When the plastic content does not meet the preset content conditions, the plastic sample image in the impurity collection area is input into a preset plastic classification model to output the plastic category corresponding to the impurity collection area based on the preset plastic classification model. The number of plastics corresponding to different plastic categories in the impurity area is determined to determine the category of plastic to be processed based on the number. The air outlet control data corresponding to the plastic category to be processed is determined in the preset plastic information library to perform secondary control on the air separator based on the air outlet control data.

[0061] Specifically, in the impurity collection area after wind selection, multiple sampling points are randomly selected, and a certain amount of impurity samples are collected from each sampling point to detect the plastic content in the impurity samples. According to the test results, the average content of plastic in the impurity samples is calculated, and the average content is compared with the preset plastic content condition.

[0062] Furthermore, when the plastic content does not meet the preset conditions, the plastic sample image in the impurity collection area is input into a preset plastic classification model. The plastic classification model is based on image recognition technology and can identify different plastic categories in the impurities, and count the identified different plastic categories to determine the number of plastics of each category. The training process of the plastic classification model is to take plastic image samples of different categories as input, take the plastic category corresponding to the input sample as output, and train the preset neural network model to obtain the preset plastic classification model.

[0063] Furthermore, the categories of plastics to be processed are determined according to the quantity of each category of plastics and the preset processing priority, and the air outlet control data corresponding to the category of plastics to be processed are searched in the preset plastic information library, wherein the air outlet control data includes parameters such as the speed of the air separator and the opening of the air door. The air separator is secondary controlled according to the found air outlet control data, and the purpose of the control is to optimize the air separation process and improve the separation efficiency and purity of the category of plastics to be processed.

[0064] In one implementation of the present application, the wind speed difference and the angle difference are determined based on the current wind outlet data and the wind outlet control data corresponding to the type of plastic to be processed; wherein the wind outlet control data includes different wind outlet speeds and different wind outlet angles. Based on the wind speed difference and the angle difference, the wind outlets of the air separator are adjusted. After a preset time interval, the impurity collection area is re-inspected. If the plastic content of the inspection does not meet the preset content conditions, a new wind outlet speed and a new wind outlet angle are selected from the wind outlet control data to re-regulate the air separator. wherein the new wind outlet speed is greater than the previously selected wind outlet speed, and the new wind outlet angle is greater than the previously selected wind outlet angle.

[0065] Specifically, the current wind speed and air outlet angle of each air outlet of the air separator are recorded, and the air outlet control data corresponding to the type of plastic to be processed is searched from the preset plastic information library, where the air outlet control data includes different air outlet speeds and different air outlet angles. For each air outlet, the difference between the current wind speed and the required wind speed is calculated, and similarly, the difference between the current air outlet angle and the required air outlet angle is calculated. According to the calculated wind speed difference and angle difference, each air outlet of the air separator is adjusted.

[0066] Furthermore, during the adjustment process, the operating status of the air separator and the change in the plastic content in the impurity collection area are continuously monitored. After the air outlet is adjusted, the impurity collection area is re-inspected at preset intervals (such as 1 hour, 2 hours, etc.). According to the inspection results, it is determined whether the plastic content in the impurity collection area meets the preset conditions. If the plastic content still does not meet the preset conditions, a new air outlet speed and a new air outlet angle are selected from the air outlet control data. The new air outlet speed should be greater than the previously selected air outlet speed, and the new air outlet angle should also be greater than the previously selected air outlet angle. Based on the new air outlet speed and air outlet angle, the air separator is regulated for the second time. Through such a process, the air outlet setting of the air separator can be gradually optimized to improve the separation efficiency and purity of the plastic.

[0067] The air separation and conveying control method in the embodiment of the present application can also realize the air separation of different materials based on actual application requirements, for example, garbage can also be air separated.

[0068] Figure 2 This is a front view of a wind selection and conveying device provided in an embodiment of the present application. Figure 3 This is a schematic diagram of the back side of a wind selection and conveying device provided in an embodiment of the present application. Figure 4 This is a side view of a wind selection and conveying device provided in an embodiment of the present application. Figure 2 , Figure 3 as well as Figure 4 As shown, the air selection conveying equipment is composed of an air selection channel 101, a bracket 107, and an air selection machine housing 110. The air selection conveying equipment also includes: a conveyor belt 109, which is evenly divided into multiple air selection areas along its width direction, and the conveyor belt 109 is used to convey the materials to be selected. An image monitoring device 102, the image monitoring device 102 is arranged on the air selection box 103, and the image monitoring device 102 is used to obtain the image of the materials to be selected on the conveyor belt 109. The air selection box 103 is arranged on the side of the image monitoring device 102 facing the material discharging direction of the conveyor belt 109, and the top of the air selection box 103 is connected to the air selection channel 101, and the bottom is respectively provided with mounting holes 106 corresponding to each air selection area. The retractable air outlet 105 includes an air duct that can be retractably mounted on the mounting hole 106, and the upper end of the air duct is connected to the inner side of the air selection box 103; the driving member 104 can drive the air duct to move up and down.

[0069] Specifically, the air selection channel 101 on the air selection conveying device is used to introduce and distribute wind power, and the wind power is guided to the inside of the air selection box 103 through the air selection channel 101 to realize the air selection of the materials on the conveying belt 109. The bracket 107 is a frame that supports the entire air selection conveying device structure, which ensures that all components can be stably fixed in place. The air selection machine outer 110 is a shell that surrounds and protects the internal components of the air selection conveying device, which is used to reduce noise and prevent dust from leaking out. The conveying belt 109 is a component in the air selection conveying device for conveying the materials to be selected. It is tilted and arranged below the air selection conveying device. It is evenly divided into multiple air selection areas along its width direction so that the materials in each area can be independently screened. The image monitoring device 102, such as a camera, is arranged on the air selection box to obtain images of the materials to be selected on the conveying belt 109. These images are used for material identification and classification. The image monitoring device 102 is usually connected to a computer control system to realize the execution of the above method for automatic control and data analysis. The air separation box 103 is located on the side of the image monitoring device 102 facing the discharge direction of the conveyor belt 109. The top of the air separation box 103 is connected to the air separation channel 101, and the bottom is provided with mounting holes 106 corresponding to each air separation area. These mounting holes 106 are used to install the retractable air outlet 105. The retractable air outlet 105 includes an air duct and a driving member 104 that can be retractably mounted on the mounting hole 106. The upper end of the air duct is connected to the inner side of the air separation box 103 to provide wind to the air selection area. The driving member 104 (such as a cylinder, a motor, etc.) can drive the air duct to move up and down, thereby adjusting the opening size and position of the air outlet, so that the wind strength can be adjusted according to the nature of the material and the screening requirements.

[0070] Each embodiment in this application is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device, equipment, and non-volatile computer storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0071] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the embodiments of the present application may have various changes and variations. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A control method for air selection and conveying, characterized in that: The method comprises: Acquire an image of the material to be selected on the conveyor belt, and determine the distribution information of the plastic to be selected based on the pixel point information corresponding to the image of the material to be selected; Based on the distribution information of the plastics to be selected, the air selection areas to which they belong are determined, and based on the plastic proportions corresponding to the air selection areas, the air outlets to be adjusted on the air separator are determined; Determine a reference air outlet associated with the air outlet to be adjusted, and construct a parameter control function based on the selected plastic data corresponding to the reference air outlet; Outputting the wind speed and the wind outlet angle corresponding to the reference air outlet based on the parameter control function, so as to control the air outlet to be adjusted based on the wind speed and the wind outlet angle; Based on the adjusted air separator, the plastic to be selected is air-separated, and the plastic composition of the air-separated material is tested, so as to perform secondary regulation on the air separator based on the test results.

2. A control method for air selection and conveying according to claim 1, characterized in that: The acquiring of the image of the material to be selected on the conveyor belt and determining the distribution information of the plastic to be selected based on the pixel point information corresponding to the image of the material to be selected specifically includes: Determine each pixel point in the output tensor corresponding to the image of the material to be selected, and determine the material category corresponding to each pixel point based on the probability of the material category corresponding to each pixel point; Divide adjacent pixels of the same material category to obtain sets of pixels corresponding to different materials to be selected; Determine a reference pixel point set belonging to the plastic category in the pixel point set, so as to obtain a plastic image region to be selected based on the reference pixel point set; Marking the image area of ​​the plastic to be selected in the image of the material to be selected, and inputting the marked image into a recurrent neural network, so as to determine the conveying sequence and conveying time correlation of the plastic to be selected on the conveyor belt through the recurrent neural network; The distribution information of the plastic to be selected is obtained based on the conveying sequence, the conveying time correlation and the area of ​​the image region of the plastic to be selected.

3. A control method for air selection and conveying according to claim 1, characterized in that: After determining the distribution information of the plastic to be selected based on the pixel point information corresponding to the image of the material to be selected, the method further includes: Based on the distribution information of the plastic to be selected, determining the shape of the plastic to be selected; Classifying the selected plastics of the same shape into the same set, so as to determine the distribution information of the plastic shape based on the number of the selected plastics in each set; Comparing the plastic shape distribution information with the plastic shape distribution information in a preset shape distribution table to obtain the winnowing machine control coefficient corresponding to the reference plastic shape distribution information with the highest similarity; The preset shape distribution table includes a plurality of reference plastic shape distribution information and a plurality of air separator control coefficients corresponding to the reference plastic shape distribution information.

4. A control method for air selection and conveying according to claim 1, characterized in that: The method of determining the air selection area based on the distribution information of the plastics to be selected, and determining the air outlet to be adjusted on the air selection machine based on the plastic proportions corresponding to each of the air selection areas, specifically includes: Based on the distribution information of the plastics to be selected, determining a placement area of ​​each plastic to be selected on the conveyor belt; Based on the number of air outlets corresponding to the winnowing machine, the conveyor belt is divided into a plurality of winnowing areas; Based on the placement areas corresponding to the selected plastics, the plastic proportions corresponding to the plurality of wind selection areas are obtained; The plastic proportion corresponding to each of the air selection areas is compared with a preset proportion threshold. When the plastic proportion is greater than the preset proportion threshold, the air selection machine outlet corresponding to the air selection area is used as the air outlet to be adjusted.

5. A control method for air selection and conveying according to claim 4, characterized in that: The step of determining a reference air outlet associated with the air outlet to be adjusted and constructing a parameter control function based on the selected plastic data corresponding to the reference air outlet specifically includes: Determine a reference air outlet adjacent to the air outlet to be adjusted, and obtain the plastic proportion corresponding to the reference air outlet, so as to determine the adjustable plastic proportion based on the difference between the plastic proportion and the preset proportion threshold; And, obtaining a placement area of ​​the to-be-selected plastic corresponding to the reference air outlet, so as to determine an air selection distance between the placement area and the air selection area of ​​the to-be-adjusted air outlet based on the two; And, based on the placement area of ​​the candidate plastics corresponding to the reference tuyere, determining the candidate plastics in a stacked state, and obtaining the plastic stacking distribution data based on the number of the candidate plastics in the stacked state and the stacking area; A parameter control function is constructed based on the adjustable plastic proportion, the wind selection distance and the plastic accumulation distribution data.

6. A control method for air selection and conveying according to claim 5, characterized in that: The parameter control function is constructed based on the adjustable plastic proportion, the wind selection distance and the plastic accumulation distribution data, specifically including: The constructed wind speed control function is: The constructed air outlet angle control function is: Based on the wind speed control function and the wind outlet angle control function, the parameter control function is obtained, so as to control the reference air outlet based on the output value of the parameter control function; Wherein, c is the wind speed of the reference vent; θ is the wind direction angle of the reference vent; p is the proportion of adjustable plastics; d is the wind selection distance; s is the plastic accumulation distribution data; v0 is the initial wind speed of the reference vent; θ0 is the initial wind direction angle of the reference vent; k1 is the first weight; k2 is the second weight; k3 is the third weight; k4 is the fourth weight; k5 is the fifth weight; k6 is the sixth weight; k7 is the seventh weight; k8 is the eighth weight; s d is the average bulk density of the selected plastics in the bulk state; s a is the area of ​​the accumulation region; is the first noise term; is the second noise term.

7. A control method for air selection and conveying according to claim 3, characterized in that: After constructing the parameter control function, the method further includes: Determine the coefficient type of the winnowing machine control coefficient; wherein the coefficient type includes a speed type and an angle type; Adjusting the wind speed control function based on the control coefficient corresponding to the speed type; The air outlet angle control function is adjusted based on the control coefficient corresponding to the angle type.

8. A control method for air selection and conveying according to claim 1, characterized in that: The plastic component detection of the air-selected material is performed to perform secondary control on the air-selector based on the detection result, specifically including: Conduct random inspections on the impurity collection area after wind separation to obtain the plastic content based on the random inspection results; In the case where the plastic content does not meet the preset content condition, the plastic sample image in the impurity collection area is input into a preset plastic classification model, so as to output the plastic category corresponding to the impurity collection area based on the preset plastic classification model; Determining the quantity of plastics corresponding to different plastic categories in the impurity area, so as to determine the category of plastics to be processed based on the quantity; The air outlet control data corresponding to the type of plastic to be processed is determined in a preset plastic information database, so as to perform secondary control on the air separator based on the air outlet control data.

9. A control method for air selection and conveying according to claim 8, characterized in that: The secondary control of the air separator based on the air outlet control data specifically includes: Determine the wind speed difference and the angle difference according to the current wind outlet data and the wind outlet control data corresponding to the type of plastic to be processed; wherein the wind outlet control data includes different wind outlet speeds and different wind outlet angles; Based on the wind speed difference and the angle difference, adjusting each air outlet of the air separator; After a preset time interval, the impurity collection area is re-inspected. If the plastic content of the sampled plastic does not meet the preset content condition, a new air outlet speed and a new air outlet angle are selected from the air outlet control data to re-regulate the air separator; Among them, the new air outlet speed is greater than the previously selected air outlet speed, and the new air outlet angle is greater than the previously selected air outlet angle.

10. A wind selection and conveying device, the device is composed of a wind selection channel, a bracket, and a wind selection machine shell, characterized in that: The device also includes: A conveyor belt, wherein the conveyor belt is evenly divided into a plurality of air selection areas along its width direction, and the conveyor belt is used to convey materials to be selected; An image monitoring device, which is arranged on the winnowing box and is used to obtain an image of the material to be selected on the conveyor belt; A winnowing box is arranged on one side of the image monitoring device facing the discharging direction of the conveyor belt, the top of the winnowing box is connected to a winnowing channel, and the bottom is provided with mounting holes corresponding to each of the winnowing areas; A retractable air outlet, comprising an air duct retractably mounted on the mounting hole, wherein the upper end of the air duct is connected to the inner side of the air separation box; The driving member can drive the air duct to move up and down.

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