Magnesium oxide extraction system for high power heating cables

Abstract

An embodiment of the present application provides a method for extracting magnesium oxide for high-power heating cables, the method comprising: acquiring a first velocity of a magnesium oxide particle group at an air outlet of a wind generating module in the first air selection and extraction device through the velocity acquisition module; acquiring a first image set of a material area adjacent to the air outlet through the image acquisition module; determining diameter distribution information of the magnesium oxide particle group according to the first image set; the processing module determining wind force generation parameters of the wind generating module according to the diameter distribution information, parameter information of a wind selection and extraction bin of the first air selection and extraction device, and the first velocity; using the wind force generation parameters to control the flow velocity and direction of the airflow generated by the wind generating module to perform air selection processing on the magnesium oxide particle group to obtain magnesium oxide particles of a preset diameter, which can be accurately screened by controlling the wind force generation parameters of the air selection and extraction device, thereby improving the accuracy of the obtained magnesium oxide particles.

Description

Technical Field

[0001] The present application relates to the technical field of magnesium oxide extraction, and in particular to a magnesium oxide extraction system for high-power heating cables. Background Art

[0002] Lightly burned magnesium oxide is a very important basic magnesium raw material, and the current demand for magnesium oxide is increasing. As the demand for magnesium oxide series products gradually changes from low quality to high quality, the accuracy of the particle size of magnesium oxide particles is also gradually increasing.

[0003] In the existing scheme, when screening magnesium oxide particles, the crushed magnesium oxide particles are usually transported to an ordinary air separation device for air separation. When the air separation device is air separation, it can usually only perform air separation according to preset parameters, which can be understood as primary air separation. The size of the magnesium oxide particles obtained is difficult to meet the high-precision requirements, resulting in low accuracy when extracting magnesium oxide particles. Summary of the invention

[0004] The embodiment of the present application provides a magnesium oxide extraction system for high-power heating cables, which can perform precise screening by controlling the wind force generation parameters of the wind selection extraction device, thereby improving the accuracy of the magnesium oxide particles obtained.

[0005] A first aspect of an embodiment of the present application provides a method for extracting magnesium oxide for a high-power heating cable, the method being applied to a magnesium oxide extraction system for a high-power heating cable, the magnesium oxide extraction for a high-power heating cable comprising a first wind selection extraction device, the first wind selection extraction device comprising a wind generation module, an image acquisition module, a speed acquisition module and a processing module, the method comprising:

[0006] The processing module collects the first velocity of the magnesium oxide particle group at the air outlet of the wind generating module in the first wind selection and extraction device through the velocity collection module;

[0007] The processing module collects a first image set of the material area adjacent to the air outlet through the image acquisition module;

[0008] The processing module determines the diameter distribution information of the magnesium oxide particles according to the first image set;

[0009] The processing module determines the wind force generation parameters of the wind force generation module according to the diameter distribution information, the parameter information of the wind selection and extraction bin of the first wind selection and extraction device, and the first speed;

[0010] The processing module uses the wind force generation parameters to control the flow velocity and direction of the airflow generated by the wind force generation module to perform wind selection on the magnesium oxide particle group to obtain magnesium oxide particles with a preset diameter.

[0011] In this example, the processing module collects the first velocity of the magnesium oxide particle group at the air outlet of the wind generating module in the first air selection and extraction device through the velocity acquisition module, the processing module collects the first image set of the material area adjacent to the air outlet through the image acquisition module, the processing module determines the diameter distribution information of the magnesium oxide particles according to the first image set, the processing module determines the wind generation parameters of the wind generating module according to the diameter distribution information, the parameter information of the wind selection and extraction bin of the first air selection and extraction device and the first velocity, the processing module uses the wind generation parameters to control the flow velocity and direction of the airflow generated by the wind generating module to perform air selection on the magnesium oxide particle group to obtain magnesium oxide particles of a preset diameter, therefore, the wind generation parameters can be accurately determined according to the first velocity of the magnesium oxide particles at the air outlet, the parameter information of the wind selection and extraction bin and the diameter distribution information of the magnesium oxide particle group, and the wind generation parameters are used to control the wind generating module to generate airflow for air selection to obtain magnesium oxide particles of a preset diameter, thereby improving the accuracy of magnesium oxide particles when being extracted.

[0012] In a possible implementation, the processing module determines the diameter distribution information of the magnesium oxide particles according to the first image set, including:

[0013] The processing module performs binarization processing on the first image in the first image set to obtain a first grayscale image set;

[0014] The processing module constructs a three-dimensional spatial distribution model of the magnesium oxide particle group according to the first grayscale image set;

[0015] The processing module extracts the diameter of the magnesium oxide particles from the three-dimensional spatial distribution model to obtain a first diameter set;

[0016] The processing module determines the diameter distribution information according to the first diameter set.

[0017] In a possible implementation, the processing module performs binarization processing on the first image in the first image set to obtain a first grayscale image set, including:

[0018] The processing module performs preliminary clustering processing on the pixels of the target image to obtain k pixel types, and the target image is any first image in the first image set;

[0019] The processing module divides the first image into regions according to the k pixel types to obtain k sub-image regions;

[0020] The processing module extracts the area of ​​each sub-image area to obtain k sub-area areas;

[0021] The processing module determines the gray value threshold of the corresponding sub-image area according to the areas of the k sub-areas, and obtains k reference gray value thresholds;

[0022] The processing module uses the reference grayscale thresholds corresponding to the k sub-image areas to perform binarization processing to obtain k sub-grayscale images;

[0023] The processing module performs splicing processing on the k sub-grayscale images to obtain a first grayscale image;

[0024] The processing module repeatedly executes the above steps from performing preliminary clustering processing on the pixels of the target image to obtain k pixel types to splicing the k sub-grayscale images to obtain the first grayscale image, until the first grayscale image set is obtained.

[0025] In a possible implementation, the processing module determines the wind force generation parameters of the wind force generation module according to the diameter distribution information, the parameter information of the wind selection and extraction bin of the first wind selection and extraction device, and the first speed, including:

[0026] The processing module determines the movement information of the magnesium oxide particles in the air when the magnesium oxide particles are sorted according to the parameter information of the air separation extraction bin and the first speed;

[0027] The processing module determines the acceleration information of the magnesium oxide particles in the magnesium oxide particle group according to the motion information;

[0028] The processing module determines the power value of the magnesium oxide particles according to the acceleration;

[0029] The processing module determines the group reference diameter information of the magnesium oxide particle group according to the diameter distribution information;

[0030] The processing module determines the air flow rate according to the reference diameter information and the power value;

[0031] The processing module determines the wind force generation parameter according to the air flow rate.

[0032] In a possible implementation, the processing module determines the movement information of the magnesium oxide particles in the air when the magnesium oxide particles are sorted according to the parameter information of the air separation extraction bin and the first speed, including:

[0033] The processing module determines the particle collision point between the air outlet of the wind generating module and the opposite inner wall according to the parameter information of the wind selection and extraction bin;

[0034] The processing module predicts the flight trajectory of the magnesium oxide particles according to the air outlet of the wind generating module, the particle collision point and the discharge port of the first air selection and extraction device to obtain a first predicted motion trajectory;

[0035] The processing module determines a first target distance between a particle collision point between an air outlet of the wind generating module and a corresponding inner wall from parameter information of the wind selection and extraction bin;

[0036] The processing module extracts the horizontal distance between the air outlet of the wind generating module and the material outlet of the first wind selecting and extracting device and the vertical distance between the air outlet of the wind generating module and the material outlet of the first wind selecting and extracting device from the parameter information of the wind selecting and extracting bin;

[0037] The processing module determines the predicted speed-time curve of the magnesium oxide particles that can fall into the discharge port of the first air separation and extraction device according to the first predicted motion trajectory, the first target distance, the horizontal distance, and the vertical distance to obtain the movement information of the magnesium oxide particles in the air.

[0038] In a possible implementation, the high-power heating cable magnesium oxide extraction further includes a bag dust collector, the discharge port of the first wind selection extraction device is connected to the feed port of the bag dust collector through a pipeline, and the processing module uses the wind force generation parameter to control the flow rate and direction of the airflow generated by the wind force generation module to perform wind selection on the magnesium oxide particle group to obtain magnesium oxide particles of a preset diameter, and the method further includes:

[0039] transporting the magnesium oxide particles of a preset diameter to a feed port of the bag filter;

[0040] The bag filter is used to perform air separation on magnesium oxide particles of a preset diameter to obtain target magnesium oxide particles.

[0041] In a possible implementation, the first air separation and extraction device further includes: a feeding component, a feeding controller, a discharge port, an air separation and extraction bin, a slag discharge port, and a feeding chute, wherein:

[0042] The feed controller is arranged in the cargo transmission channel of the feed component, and the control end of the feed controller is connected to the processing module; the output port of the feed component is arranged opposite to the feed chute, and the magnesium oxide particles fall into the first end of the feed chute from the output port, and the second end of the feed chute is arranged adjacent to the air outlet of the wind power generating module;

[0043] The air outlet is arranged opposite to the air selection and extraction bin, the material discharge port is arranged at the upper part of the air selection and extraction bin, and the material discharge port is used to receive the magnesium oxide particles screened by the airflow emitted through the air outlet; the acquisition part of the image acquisition module is arranged opposite to the feeding chute, and the speed acquisition module is arranged adjacent to the image acquisition module; the control port of the wind force generating module, the control port of the image acquisition module, and the control port of the speed acquisition module are connected to the processing module, and the processing module is arranged outside the feeding component. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 A structural schematic diagram of a magnesium oxide extraction system for a high-power heating cable is provided for an embodiment of the present application;

[0046] Figure 2A A schematic flow chart of a method for extracting magnesium oxide for high-power heating cables is provided for an embodiment of the present application;

[0047] Figure 2B A structural schematic diagram of a first air separation and extraction device is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0049] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0050] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0051] In order to better understand the magnesium oxide extraction system for high-power heating cables provided in the embodiment of the present application, the existing magnesium oxide extraction method is first briefly introduced below. As the accuracy of the diameter requirement of magnesium oxide particles increases, more accurate screening of magnesium oxide particles is required. In the existing scheme, when screening magnesium oxide particles, an ordinary air selection device is usually used for screening and extraction. The air selection and extraction device, for example, uses a fixed air flow rate to screen and extract magnesium oxide particles. Since the magnesium oxide particles need to be crushed after being made, the size of the magnesium oxide particles is also randomly distributed due to the large randomness of the crushing. After the magnesium oxide particle group enters the air selection device, its distribution state is diverse, which reduces the efficiency of screening and extraction using a fixed air flow rate, and also reduces the accuracy of screening and extraction.

[0052] In response to the above problems, an embodiment of the present application provides a method for extracting magnesium oxide for high-power heating cables, which can accurately determine the wind force generation parameters according to the first speed of the magnesium oxide particles at the air outlet, the parameter information of the air separation extraction bin, and the diameter distribution information of the magnesium oxide particle group, and use the wind force generation parameters to control the wind force generation module to generate airflow for air separation to obtain magnesium oxide particles of a preset diameter, thereby improving the accuracy of the magnesium oxide particles when being extracted.

[0053] See also Figure 1 , Figure 1 A schematic diagram of a magnesium oxide extraction system for a high-power heating cable is provided for an embodiment of the present application. Figure 1 As shown, the magnesium oxide extraction system for high-power heating cables includes a first air selection extraction device and a bag dust collector. The first air selection extraction device can be used to screen the crushed magnesium oxide particle group for the first time to obtain magnesium oxide particles with a diameter within a first preset diameter range. However, among the magnesium oxide particles within the first preset diameter range, there will be magnesium oxide particles with a diameter smaller than that required for actual use. The bag dust collector is used to extract and finally obtain magnesium oxide particles that meet the requirements. Among them, the first preset diameter range can be a diameter range less than 0.425mm. The diameter range of the magnesium oxide particles required for use can be 0.0425mm-0.425mm.

[0054] See also Figure 2A , Figure 2A The present invention provides a schematic flow diagram of a method for extracting magnesium oxide for high-power heating cables. Figure 2A As shown, the method is applied to a magnesium oxide extraction system for a high-power heating cable, the magnesium oxide extraction system for a high-power heating cable comprises a first wind selection extraction device, the first wind selection extraction device comprises a wind generation module, an image acquisition module, a speed acquisition module and a processing module, the method comprises:

[0055] 201. The processing module collects the first velocity of the magnesium oxide particle group at the air outlet of the wind generating module in the first air selection and extraction device through the velocity collection module.

[0056] Wherein, the processing module includes a processor, and the processor can execute the computer program in the processing module to realize the corresponding functions, etc. The speed acquisition module can be an infrared scanner, etc., which can scan and obtain the first speed of the magnesium oxide particle group at the air outlet of the wind generating module. The first speed of the magnesium oxide particle group can be the average speed of the magnesium oxide particles in the preset area at the air outlet, or it can be the average speed of some sampled magnesium oxide particles in the preset area obtained by sampling. The preset area can be a spatial area at a preset distance from the air outlet of the wind generating module, and the preset distance is set by empirical value or historical data.

[0057] 202. The processing module collects a first image set of a material area adjacent to the air outlet through the image collection module.

[0058] The image acquisition module can be a high-definition camera, a high-definition infrared camera, etc., which can acquire high-definition images of the material area. The high-definition image can be understood as an image with a resolution higher than a preset resolution threshold, and the preset resolution threshold is set by empirical values ​​or historical data. Since the magnesium oxide particles are three-dimensionally distributed in the air at the air outlet, the image acquisition module can include multiple images at this time, and images can be taken from multiple angles, thereby obtaining multiple first images to form a first image set.

[0059] 203. The processing module determines diameter distribution information of magnesium oxide particles according to the first image set.

[0060] The processing module can perform grayscale processing on the first image in the first image set to obtain a first grayscale image set, and use the first grayscale image set to construct a three-dimensional spatial distribution model of magnesium oxide particles, and finally determine the diameter distribution information of the magnesium oxide particles based on the three-dimensional spatial distribution model. Since the magnesium oxide particle group is three-dimensionally distributed, if a plane image is directly used to determine the diameter distribution information, occlusion will occur, thereby reducing the actual number of magnesium oxide particle diameters that can be obtained. Therefore, by constructing a three-dimensional spatial distribution model of the magnesium oxide particle group through the first image set, and determining the diameter distribution information from the three-dimensional spatial distribution model, the accuracy of determining the diameter distribution information can be greatly improved.

[0061] 204. The processing module determines the wind generation parameters of the wind generation module according to the diameter distribution information, the parameter information of the wind selection and extraction bin of the first wind selection and extraction device, and the first speed.

[0062] Among them, the processing module can determine the motion information of the magnesium oxide particles according to the parameter information of the air selection and extraction bin, and then determine the acceleration information of the magnesium oxide particles according to the motion information and the first speed, determine the power value of the magnesium oxide particles according to the acceleration information, and then determine the air flow rate according to the power value and the group reference diameter of the magnesium oxide particle group, and finally determine the wind force generation parameters according to the air flow rate. The wind force generation parameters include the flow rate of the gas and the direction of the airflow. The group reference diameter can be the maximum diameter within the dense distribution range of the diameter in the magnesium oxide particle group. For example, the dense distribution range of the diameter of the magnesium oxide particle group is 0.325mm-0.400mm, then 0.400mm can be determined as the group reference diameter. It should be noted that the group reference diameter should be smaller than the required diameter of the magnesium oxide particles. For example, if the required diameter of magnesium oxide is less than 0.425mm, then the group reference diameter should be less than 0.425mm. Therefore, the movement information and the first speed of the magnesium oxide particles can be determined according to the parameter information of the air separation extraction bin to estimate the dynamic value of the magnesium oxide particles. Finally, the air flow rate can be determined according to the dynamic value and the group reference diameter of the magnesium oxide particles, so as to determine the wind force generation parameters according to the air flow rate. Therefore, the wind force generation parameters are related to the group reference diameter and the first speed of the magnesium oxide particle group. This correlation is a strong direct correlation, which can greatly improve the accuracy of the obtained wind force generation parameters.

[0063] 205. The processing module uses the wind force generating parameters to control the velocity and direction of the airflow generated by the wind force generating module to perform air separation on the magnesium oxide particle group to obtain magnesium oxide particles with a preset diameter.

[0064] The wind generating module may be a device that can generate airflow, such as a blower or a magnetic suspension blower. The processing module controls the wind generating module to perform air selection according to the velocity and direction of the airflow, thereby obtaining magnesium oxide particles of a preset diameter. The preset diameter may be a diameter less than 0.425 mm.

[0065] In this example, the processing module collects the first velocity of the magnesium oxide particle group at the air outlet of the wind generating module in the first air selection and extraction device through the velocity acquisition module, the processing module collects the first image set of the material area adjacent to the air outlet through the image acquisition module, the processing module determines the diameter distribution information of the magnesium oxide particles according to the first image set, the processing module determines the wind generation parameters of the wind generating module according to the diameter distribution information, the parameter information of the wind selection and extraction bin of the first air selection and extraction device and the first velocity, the processing module uses the wind generation parameters to control the flow velocity and direction of the airflow generated by the wind generating module to perform air selection on the magnesium oxide particle group to obtain magnesium oxide particles of a preset diameter, therefore, the wind generation parameters can be accurately determined according to the first velocity of the magnesium oxide particles at the air outlet, the parameter information of the wind selection and extraction bin and the diameter distribution information of the magnesium oxide particle group, and the wind generation parameters are used to control the wind generating module to generate airflow for air selection to obtain magnesium oxide particles of a preset diameter, thereby improving the accuracy of magnesium oxide particles when being extracted.

[0066] In a possible implementation, the processing module determines the diameter distribution information of the magnesium oxide particles according to the first image set, including:

[0067] A1, the processing module performs binarization processing on the first image in the first image set to obtain a first grayscale image set;

[0068] A2, the processing module constructs a three-dimensional spatial distribution model of magnesium oxide particles according to the first grayscale image set;

[0069] A3, the processing module extracts the diameter of the magnesium oxide particles from the three-dimensional spatial distribution model to obtain a first diameter set;

[0070] A4. The processing module determines the diameter distribution information according to the first diameter set.

[0071] Among them, since the areas where magnesium oxide particles of different diameters are located will be greatly different, regional clustering can be performed. Since the diameter of magnesium oxide particles is very small, an extremely high-definition camera device is required for camera processing. At the same time, due to the resolution limitation of the camera device itself, some magnesium oxide particles will be misjudged as pixels, or magnesium oxide particles with a diameter less than a certain threshold will be judged as pixels of a large-diameter magnesium oxide particle. At this time, it is necessary to perform preliminary clustering processing on the pixels to obtain multiple types of pixel types. For example, the pixels of large-diameter magnesium oxide particles, the pixels of small-diameter magnesium oxide particles, magnesium oxide particles judged as single pixels, and smaller magnesium oxide particles that cannot be defined by pixels. Such magnesium oxide particles are too small in diameter. Because during screening, if the magnesium oxide particles that are much larger than their diameter in the diameter distribution information can be screened, they can usually flow into the discharge port with the airflow. Therefore, the influence of such magnesium oxide particles can be ignored.

[0072] The first image can be divided into regions according to the pixel type, and regions of large-diameter magnesium oxide particles, regions of small-diameter magnesium oxide particles, and background regions can be obtained. Different regions have different effects on each other's colors after they are formed, so the gray value threshold can be determined according to the area of ​​the region, and the determined gray value threshold is used for binarization processing to finally obtain the first gray image.

[0073] The position of the magnesium oxide particles in each first grayscale image can be corrected to obtain the three-dimensional position information and the three-dimensional shape of the magnesium oxide particles. A three-dimensional spatial distribution model is constructed based on the three-dimensional position information and the three-dimensional shape of the magnesium oxide particles. Among them, a general position correction and three-dimensional shape construction method can be used to obtain the three-dimensional position information of the magnesium oxide particles and construct the three-dimensional shape.

[0074] The maximum endpoint distance of the magnesium oxide particles in the three-dimensional spatial distribution model can be determined as the diameter of the magnesium oxide particles, thereby obtaining a first diameter set. The diameter distribution information of the first diameter set can be constructed using a general method for constructing distribution information based on diameter information.

[0075] In this example, the pixels of the first image are preliminarily clustered to obtain areas of large-diameter magnesium oxide particles, areas of small-diameter magnesium oxide particles, and background areas, and then grayscale processing is performed on different areas to obtain a first grayscale image. A three-dimensional spatial distribution model is then constructed based on the first grayscale image set, and a first diameter set is extracted from the three-dimensional spatial distribution model, and diameter distribution information is constructed. Therefore, adaptive grayscale processing can be performed according to different areas to improve the accuracy of grayscale processing, thereby improving the accuracy of subsequent determination of diameter distribution information.

[0076] In a possible implementation, the processing module uses the first grayscale threshold in the first grayscale threshold set to perform binarization processing on the corresponding first image to obtain a first grayscale image set, including:

[0077] B1, the processing module performs preliminary clustering processing on the pixels of the target image to obtain k pixel types, and the target image is any first image in the first image set;

[0078] B2, the processing module divides the first image into regions according to the k pixel types to obtain k sub-image regions;

[0079] B3, the processing module extracts the area of ​​each sub-image area to obtain k sub-area areas;

[0080] B4, the processing module determines the gray value threshold of the corresponding sub-image area according to the areas of the k sub-areas, and obtains k reference gray value thresholds;

[0081] B5, the processing module uses the reference grayscale thresholds corresponding to the k sub-image areas to perform binarization processing to obtain k sub-grayscale images;

[0082] B6, the processing module performs splicing processing on the k sub-grayscale images to obtain a first grayscale image;

[0083] B7. The processing module repeatedly executes the above steps from performing preliminary clustering processing on the pixels of the target image to obtain k pixel types to splicing the k sub-grayscale images to obtain the first grayscale image, until the first grayscale image set is obtained.

[0084] Among them, since the areas where magnesium oxide particles of different diameters are located will be greatly different, regional clustering can be performed. Since the diameter of magnesium oxide particles is very small, an extremely high-definition camera device is required for camera processing. At the same time, due to the resolution limitation of the camera device itself, some magnesium oxide particles will be misjudged as pixels, or magnesium oxide particles with a diameter less than a certain threshold will be judged as pixels of a large-diameter magnesium oxide particle. At this time, it is necessary to perform preliminary clustering processing on the pixels to obtain multiple types of pixel types. For example, the pixels of large-diameter magnesium oxide particles, the pixels of small-diameter magnesium oxide particles, magnesium oxide particles judged as single pixels, and smaller magnesium oxide particles that cannot be defined by pixels. Such magnesium oxide particles are too small in diameter. Because during screening, if the magnesium oxide particles that are much larger than their diameter in the diameter distribution information can be screened, they can usually flow into the discharge port with the airflow. Therefore, the influence of such magnesium oxide particles can be ignored.

[0085] Due to the different sizes of magnesium oxide particles, the corresponding colors will have some differences in brightness when shooting. Therefore, when the sub-image area determined according to the size distribution of magnesium oxide particles is binarized, the grayscale value threshold can be determined according to the area, so that a more accurate grayscale value threshold can be obtained. Since the pixel point type of each sub-image area is different, in each pixel point type, the larger the corresponding area, the larger the grayscale value threshold, and the smaller the area, the smaller the grayscale value threshold. At the same time, the intervals of grayscale value thresholds corresponding to different pixel point types are also different.

[0086] When the k sub-grayscale images are spliced ​​together, the splicing process may be performed according to the division positions when the first image is divided into regions, thereby obtaining the first grayscale image.

[0087] In this example, by preliminarily clustering the pixels of the first image, the areas of large-diameter magnesium oxide particles, small-diameter magnesium oxide particles, and background areas are obtained, and then grayscale processing is performed on different areas to obtain a first grayscale image. This can improve the accuracy of the first grayscale image when used for subsequent processing.

[0088] In a possible implementation, the processing module determines the wind force generation parameters of the wind force generation module according to the diameter distribution information, the parameter information of the wind selection and extraction bin of the first wind selection and extraction device, and the first speed, including:

[0089] C1. The processing module determines the movement information of the magnesium oxide particles in the air when the magnesium oxide particles are sorted according to the parameter information of the air separation extraction bin and the first speed;

[0090] C2. The processing module determines the acceleration information of the magnesium oxide particles in the magnesium oxide particle group according to the motion information;

[0091] C3, the processing module determines the power value of the magnesium oxide particles according to the acceleration;

[0092] C4, the processing module determines the group reference diameter information of the magnesium oxide particle group according to the diameter distribution information;

[0093] C5, the processing module determines the air flow rate according to the reference diameter information and the power value;

[0094] C6. The processing module determines the wind force generation parameter according to the air flow rate.

[0095] The parameter information of the wind selection and extraction bin may include the distance between each inner wall in the wind selection and extraction bin, the shape information of the inner wall, etc.

[0096] The processing module can determine the particle collision point between the magnesium oxide particles and the inner wall opposite to the air outlet according to the parameter information of the air selection extraction chamber. After colliding with the inner wall, the magnesium oxide particles will be rebounded and then move upward with the air flow until they fall into the outlet. Figure 2B As shown in . Therefore, the flight trajectory of the magnesium oxide particles can be predicted based on the collision point and the air outlet, the discharge port and the collision point of the wind generating module. Then, based on the first speed (which can be understood as the initial speed of the magnesium oxide particles), the motion trajectory and the parameter information of the wind selection and extraction bin, the predicted speed-time curve of the magnesium oxide particles that can fall into the discharge port of the first wind selection and extraction device is calculated, thereby obtaining the movement information of the magnesium oxide particles in the air.

[0097] The velocity-time curve can be derivatized to obtain an acceleration change curve of the magnesium oxide particles, and the acceleration change curve can be determined as acceleration information. The acceleration can be converted into a force to obtain a power value.

[0098] Then, the reference diameter information and the power value are used to determine the air velocity, and finally the air velocity is used to determine the wind force generation parameters. The wind force generation parameters include the velocity and direction of the airflow. Specifically, due to the different directions of the airflow, the lift generated by the magnesium oxide particles will also be different. Therefore, the wind force direction and flow velocity in the wind force generation parameters can be used for balancing, and then the reference diameter information and the power value are used to determine the air velocity, the optimal solution of the flow velocity and direction when the wind force generation module generates the airflow, so as to obtain the modified wind force generation parameters.

[0099] Specifically, the air flow rate can be calculated by referring to the diameter information and the power value using the method shown in the following formula:

[0100]

[0101] Among them, v1 is the air flow rate, v2 is the component of the particle along the air flow rate direction, F1 is the gravity of the magnesium oxide particle, F2 is the air buoyancy of the magnesium oxide particle, F3 is the dynamic value, d is the reference diameter information (the reference diameter information here is the reference diameter), ρ1 is the air density, and C is the lift coefficient.

[0102] In this example, the parameter information of the air separation extraction bin can be used to determine the movement information of the magnesium oxide particles in the air when the magnesium oxide particles are sorted, and then the acceleration information can be determined based on the movement information and the first speed. Finally, the air flow rate is determined by the power value and the group reference diameter information of the magnesium oxide particle group, and the wind force generation parameters are determined based on the air flow rate, thereby improving the accuracy of obtaining the wind force generation parameters.

[0103] In a possible implementation, the processing module determines the movement information of the magnesium oxide particles in the air when the magnesium oxide particles are sorted according to the parameter information of the air separation extraction bin and the first speed, including:

[0104] D1, the processing module determines the particle collision point between the air outlet of the wind generating module and the opposite inner wall from the parameter information of the wind selection and extraction bin;

[0105] D2, the processing module predicts the flight trajectory of the magnesium oxide particles according to the air outlet of the wind generating module, the particle collision point and the discharge port of the first air separation and extraction device to obtain a first predicted motion trajectory;

[0106] D3, the processing module determines the first target distance between the particle collision point between the air outlet of the wind generating module and the corresponding inner wall from the parameter information of the wind selection and extraction bin;

[0107] D4, the processing module extracts the horizontal distance between the air outlet of the wind power generating module and the material outlet of the first wind selection and extraction device and the vertical distance between the air outlet of the wind power generating module and the material outlet of the first wind selection and extraction device from the parameter information of the wind selection and extraction bin;

[0108] D5. The processing module determines the predicted speed-time curve of the magnesium oxide particles that can fall into the discharge port of the first air separation and extraction device according to the first predicted motion trajectory, the first target distance, the horizontal distance, and the vertical distance to obtain the movement information of the magnesium oxide particles in the air.

[0109] Among them, the initial air outlet direction of the extraction outlet and the initial gas flow rate can be used to determine the initial motion trajectory of the magnesium oxide particles according to the initial air outlet direction and the preset initial velocity of the magnesium oxide particles, and the contact point between the initial motion trajectory and the air outlet of the wind generating module and the relative inner wall is determined as the particle collision point. Since the magnesium oxide particles follow the parabolic motion rules after leaving the feed chute, the corresponding parabolic motion trajectory (i.e., the initial motion trajectory) can be determined according to the preset initial velocity, the initial air outlet direction and the initial gas flow rate, wherein the preset initial velocity is the minimum speed at which the magnesium oxide particles can cross the air selection extraction bin. The initial air outlet direction is the direction of the preset angle with the feed chute, and the preset angle is set by empirical values ​​or historical data.

[0110] The particle collision area is determined according to the particle collision point; the trajectory is predicted according to the particle collision area, the discharge port, and the air outlet to obtain a first predicted motion trajectory. The particle collision area can be a mapping area on the air outlet and the opposite inner wall of the wind generating module with the particle collision point as the center of the ellipse. In the mapping area, the major axis of the ellipse is the vertical direction and the minor axis of the ellipse is the horizontal direction. The vertical direction can be understood as the direction extending vertically when the air selection and extraction bin is placed horizontally, and the horizontal direction is the direction extending horizontally when the air selection and extraction bin is placed horizontally.

[0111] The lowest collision point in the collision area is taken as the lowest trajectory point, the highest collision point in the collision area is taken as the highest point of the collision trajectory, and the discharge port is taken as the end point. A curve is extended along the direction of the inner wall of the air separation and extraction bin to obtain the first sub-motion trajectory from the collision point to the discharge port. The air outlet is taken as the starting point, the lowest collision point is taken as the lowest trajectory point, and the highest collision point in the collision area is taken as the highest point of the collision trajectory. A parabolic trajectory is constructed to obtain the second sub-motion trajectory from the air outlet to the collision point. The two motion trajectories are spliced ​​to obtain the first predicted motion trajectory. The first motion trajectory can be figuratively regarded as the flow trajectory of the airflow. Specifically, Figure 2B The first target distance, horizontal distance, and vertical distance can be marked as shown in FIG. Figure 2B shown.

[0112] When the magnesium oxide particle moves along the first predicted motion trajectory, its first target distance, horizontal distance, and vertical distance can be calculated as the movement distance of the magnesium oxide particle, so that a speed time curve can be constructed in combination with a preset initial speed to obtain a predicted speed time curve.

[0113] In this example, the collision point can be predicted by the preset initial speed, initial airflow direction and size. After the collision point is predicted, the collision area is constructed, and then the first predicted motion trajectory is constructed based on the collision area and the discharge port and air outlet. Finally, the motion information of the magnesium oxide particles is determined based on the first predicted motion trajectory, etc., which can improve the accuracy of determining the motion information.

[0114] In a possible implementation, the high-power heating cable magnesium oxide extraction further includes a bag dust collector, the discharge port of the first wind selection extraction device is connected to the feed port of the bag dust collector through a pipeline, and the processing module uses the wind force generation parameter to control the flow rate and direction of the airflow generated by the wind force generation module to perform wind selection on the magnesium oxide particle group to obtain magnesium oxide particles of a preset diameter, and the method further includes:

[0115] E1. transporting the magnesium oxide particles of a preset diameter to the feed port of the bag filter;

[0116] E2. The magnesium oxide particles of a preset diameter are screened by the bag filter to obtain target magnesium oxide particles.

[0117] When the magnesium oxide particles of a preset diameter are subjected to air separation, the magnesium oxide particles with a diameter smaller than a second preset diameter may be screened out. The second preset diameter may be, for example, 0.0425 mm.

[0118] In one possible implementation, Figure 2B FIG. 2 shows a schematic diagram of the structure of a first wind selection and extraction device. Figure 2B As shown, the first air separation and extraction device also includes: a feeding component 1, a feeding controller 2, a discharge port 3, an air separation and extraction bin 4, a slag discharge port 5, and a feeding chute 6, wherein:

[0119] The feed controller 2 is arranged in the cargo transmission channel of the feed component 1, and the control end of the feed controller 2 is connected to the processing module 9; the output port of the feed component 1 is arranged opposite to the feed chute 6, and the magnesium oxide particles fall into the first end of the feed chute 6 from the output port, and the second end of the feed chute 6 is arranged adjacent to the air outlet 10 of the wind generating module (the whole component is not shown in the figure);

[0120] The air outlet 10 is arranged opposite to the air selection and extraction bin 4, and the discharge port 3 is arranged at the upper part of the air selection and extraction bin 4, and the discharge port 3 is used to receive the magnesium oxide particles after being screened by the airflow emitted through the air outlet 10; the acquisition part of the image acquisition module 7 is arranged opposite to the feeding chute 6, and the speed acquisition module 8 is arranged adjacent to the image acquisition module 7; the control port of the wind generating module, the control port of the image acquisition module 7, and the control port of the speed acquisition module 8 are connected to the processing module 9, and the processing module 9 is arranged outside the feeding component 1.

[0121] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0122] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0123] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be electrical or other forms.

[0124] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0125] In addition, the functional units in the various embodiments of the application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or in the form of software program modules.

[0126] If the integrated unit is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a memory, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, disk or optical disk and other media that can store program codes.

[0127] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable memory, which can include: a flash drive, a read-only memory, a random access memory, a magnetic disk or an optical disk, etc.

[0128] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for extracting magnesium oxide for high-power heating cables, characterized in that: The method is applied to a magnesium oxide extraction system for high-power heating cables, the magnesium oxide extraction system for high-power heating cables comprising a first wind selection and extraction device, the first wind selection and extraction device comprising a wind power generation module, an image acquisition module, a speed acquisition module and a processing module, the first wind selection and extraction device also comprising: a feeding component, a feeding controller, a discharge port, a wind selection and extraction bin, a slag discharge port, and a feeding chute, the method comprising: The processing module collects the first velocity of the magnesium oxide particle group at the air outlet of the wind generating module in the first wind selection and extraction device through the velocity collection module; The processing module collects a first image set of the material area adjacent to the air outlet through the image acquisition module; The processing module determines the diameter distribution information of the magnesium oxide particle group according to the first image set; The processing module determines the wind force generation parameters of the wind force generation module according to the diameter distribution information, the parameter information of the wind selection and extraction bin of the first wind selection and extraction device, and the first speed; The processing module uses the wind force generation parameters to control the velocity and direction of the airflow generated by the wind force generation module to perform air separation on the magnesium oxide particle group to obtain magnesium oxide particles with a preset diameter; The processing module determines the particle collision point between the air outlet of the wind generating module and the opposite inner wall according to the parameter information of the wind selection and extraction bin; The processing module predicts the flight trajectory of the magnesium oxide particles according to the air outlet of the wind generating module, the particle collision point and the discharge port of the first air selection and extraction device to obtain a first predicted motion trajectory; The processing module determines a first target distance between a particle collision point between an air outlet of the wind generating module and a corresponding inner wall from parameter information of the wind selection and extraction bin; The processing module extracts the horizontal distance between the air outlet of the wind generating module and the material outlet of the first wind selecting and extracting device and the vertical distance between the air outlet of the wind generating module and the material outlet of the first wind selecting and extracting device from the parameter information of the wind selecting and extracting bin; The processing module determines the predicted speed-time curve of the magnesium oxide particles that can fall into the discharge port of the first air separation and extraction device according to the first predicted motion trajectory, the first target distance, the horizontal distance, and the vertical distance to obtain the movement information of the magnesium oxide particles in the air.

2. The method for extracting magnesium oxide for high-power heating cables according to claim 1, characterized in that: The processing module determines the diameter distribution information of the magnesium oxide particle group according to the first image set, including: The processing module performs binarization processing on the first image in the first image set to obtain a first grayscale image set; The processing module constructs a three-dimensional spatial distribution model of the magnesium oxide particle group according to the first grayscale image set; The processing module extracts the diameter of the magnesium oxide particles from the three-dimensional spatial distribution model to obtain a first diameter set; The processing module determines the diameter distribution information according to the first diameter set.

3. The method for extracting magnesium oxide for high-power heating cables according to claim 2, characterized in that: The processing module performs binarization processing on the first image in the first image set to obtain a first grayscale image set, including: The processing module performs preliminary clustering processing on the pixels of the target image to obtain k pixel types, and the target image is any first image in the first image set; The processing module divides the first image into regions according to the k pixel types to obtain k sub-image regions; The processing module extracts the area of ​​each sub-image area to obtain k sub-area areas; The processing module determines the gray value threshold of the corresponding sub-image area according to the areas of the k sub-areas to obtain k reference gray value thresholds; The processing module uses the reference grayscale thresholds corresponding to the k sub-image areas to perform binarization processing to obtain k sub-grayscale images; The processing module performs splicing processing on the k sub-grayscale images to obtain a first grayscale image; The processing module repeatedly executes the above steps from performing preliminary clustering processing on the pixels of the target image to obtain k pixel types to splicing the k sub-grayscale images to obtain the first grayscale image, until the first grayscale image set is obtained.

4. The method for extracting magnesium oxide for high-power heating cables according to any one of claims 1 to 3, characterized in that: The processing module determines the wind force generation parameters of the wind force generation module according to the diameter distribution information, the parameter information of the wind selection and extraction bin of the first wind selection and extraction device, and the first speed, including: The processing module determines the movement information of the magnesium oxide particles in the air when the magnesium oxide particles are sorted according to the parameter information of the air separation extraction bin and the first speed; The processing module determines the acceleration information of the magnesium oxide particles in the magnesium oxide particle group according to the motion information; The processing module determines the power value of the magnesium oxide particles according to the acceleration; The processing module determines the group reference diameter information of the magnesium oxide particle group according to the diameter distribution information; The processing module determines the air flow rate according to the reference diameter information and the power value; The processing module determines the wind force generation parameter according to the air flow rate.

5. The method for extracting magnesium oxide for high-power heating cables according to claim 1, characterized in that: The high-power heating cable magnesium oxide extraction also includes a bag dust collector, the discharge port of the first wind selection extraction device is connected to the feed port of the bag dust collector through a pipeline, and the processing module uses the wind force generation parameter to control the flow rate and direction of the airflow generated by the wind force generation module to perform wind selection on the magnesium oxide particle group to obtain magnesium oxide particles with a preset diameter. The method also includes: transporting the magnesium oxide particles of a preset diameter to a feed port of the bag filter; The bag filter is used to screen magnesium oxide particles of a preset diameter to obtain target magnesium oxide particles.

6. The method for extracting magnesium oxide for high-power heating cables according to claim 1, characterized in that: The feed controller is arranged in the cargo transmission channel of the feed component, and the control end of the feed controller is connected to the processing module; the output port of the feed component is arranged opposite to the feed chute, and the magnesium oxide particles fall into the first end of the feed chute from the output port, and the second end of the feed chute is arranged adjacent to the air outlet of the wind power generating module; The air outlet is arranged opposite to the air selection and extraction bin, the material discharge port is arranged at the upper part of the air selection and extraction bin, and the material discharge port is used to receive the magnesium oxide particles screened by the airflow emitted through the air outlet; the acquisition part of the image acquisition module is arranged opposite to the feeding chute, and the speed acquisition module is arranged adjacent to the image acquisition module; the control port of the wind force generating module, the control port of the image acquisition module, and the control port of the speed acquisition module are connected to the processing module, and the processing module is arranged outside the feeding component.

Images