Multistage gradient filtration spinneret for alumina precursor solution and filtration control method

Abstract

The application relates to a multistage gradient filter spinneret of an alumina precursor solution and a filtering control method, relates to the field of alumina fiber preparation, and the method comprises the following steps: acquiring video information at each spinning hole of the spinneret, the use time length of a filter screen and the spinning time length of continuous spinning; determining a first target spinning hole with overflow around the spinning hole and a second target spinning hole with blockage from the video information; determining the shape of the fiber spun out of the spinning hole from the video information, and determining a third target spinning hole with abnormal shape; and determining the use progress of the filter screen based on the first target spinning hole, the second target spinning hole, the third target spinning hole, the use time length of the filter screen and the spinning time length. The application has the effect that workers can accurately know whether the filter screen needs to be replaced.

Description

Technical Field

[0001] This application relates to the field of alumina fiber preparation, and in particular to a multi-stage gradient filter spinneret and filtration control method for alumina precursor solutions. Background Technology

[0002] Alumina fiber is a type of fiber made from alumina. High-performance inorganic fibers with aluminum as the main component possess properties such as high temperature resistance (up to 1600℃ or higher), oxidation resistance, corrosion resistance, high strength, and high modulus. They are widely used in aerospace, high-temperature insulation, composite material reinforcement, and industrial kiln linings. Their preparation methods mainly include the sol-gel method. This method typically involves first mixing an aluminum source (such as aluminum chloride, aluminum isopropoxide, etc.) with a silicon source to prepare a spinnable sol. Spinning aids (such as polyvinylpyrrolidone) are added to adjust the viscosity to obtain a spinning solution. Then, dry spinning is used to extrude the spinning solution through a spinneret, where the solvent evaporates in hot air to form fibers, thus forming gel fibers.

[0003] Because the spinning solution contains impurities of different sizes, it needs to be filtered through multiple layers of filter screens. During the spinning process, long-term use of the filter screens can lead to their failure. Impurities can then pass through the filter screens and enter the spinneret holes, affecting the spinning quality. Since the filter screens are located inside the spinning equipment, it is inconvenient for staff to monitor their usage progress, making it difficult for them to accurately determine whether the filter screens need to be replaced. Summary of the Invention

[0004] To enable staff to accurately determine whether the filter needs to be replaced, this application provides a multi-stage gradient filter spinneret for alumina precursor solutions and a filtration control method.

[0005] In a first aspect, this application provides a multi-stage gradient filtration control method for alumina precursor solutions, employing the following technical solution:

[0006] A multi-stage gradient filtration control method for alumina precursor solutions includes:

[0007] Acquire video information at each spinneret hole on the spinneret, the usage time of the filter screen, and the continuous spinnereting time;

[0008] The video information identified a first target spinneret with overflow around it and a second target spinneret that was blocked.

[0009] The shape of the fibers ejected from the spinneret is determined from the video information, and a third target spinneret with an abnormal shape is identified.

[0010] determine the use progress of the filter screen based on the first target spinneret hole, the second target spinneret hole, the third target spinneret hole, the use time length of the filter screen and the spinning time length.

[0011] By adopting the technical solutions, the video information at each spinneret hole of the spinneret plate is acquired to know the specific situation of each spinneret hole, the use time length of the filter screen and the spinning time length of the spinneret plate are acquired to analyze the use progress of the filter screen, the first target spinneret hole and the second target spinneret hole are determined from the video information, the first target spinneret hole has overflow around, which is caused by the foreign matter entering the spinneret hole, the second target spinneret hole is completely blocked by the foreign matter, the first target spinneret hole and the second target spinneret hole represent the use progress of the filter screen to a certain extent, the form of the fiber jetted from each spinneret hole is determined from the video information, the form is the form of the fiber jetted from the spinneret hole when the spinneret hole works, if the form is abnormal, it is affected by the foreign matter, and thus the third target spinneret hole with abnormal form is determined, and finally the accurate use progress of the filter screen is determined based on the first target spinneret hole, the second target spinneret hole, the third target spinneret hole, the use time length of the filter screen and the spinning time length, so that the filter screen can be replaced when the use progress of the filter screen reaches the set use progress.

[0012] In another possible implementation manner, the determining of the form of the fiber jetted from the spinneret hole from the video information and the second target spinneret hole with abnormal form includes:

[0013] determining the fiber feature jetted from each spinneret hole in each frame of the video information;

[0014] determining the width of the fiber feature, and performing curve fitting on the fiber feature to obtain a curve line representing the form of the fiber feature;

[0015] determining a first similarity between the curve line corresponding to each spinneret hole in each frame and a preset curve line, and calculating a second similarity between the curve lines corresponding to each spinneret hole in adjacent two frames;

[0016] determining a first abnormal score of each spinneret hole based on the first similarity, the second similarity and the width of the fiber feature;

[0017] determining the spinneret hole with the first abnormal score reaching a preset score threshold as the second target spinneret hole.

[0018] In another possible implementation manner, the determining of the first abnormal score of each spinneret hole based on the first similarity, the second similarity and the width of the fiber feature includes:

[0019] determine a first similarity average value of each spinneret based on the first similarity of each spinneret per frame of picture;

[0020] determine a second similarity variance of each spinneret based on the second similarity of all adjacent two frames of picture of each spinneret;

[0021] determine a difference value between the width of the fiber feature and a preset width, and determine a product of the second similarity variance and the difference value;

[0022] determine a ratio of the product and the first similarity average value, the ratio representing a first abnormality score of each spinneret.

[0023] In another possible implementation manner, the determining the usage progress of the filter screen based on the first target spinneret, the second target spinneret, the third target spinneret, the filter screen usage time length and the spinneret time length comprises:

[0024] determine an area of the overflow around the first target spinneret, and determine a total area of all the overflow around the first target spinneret;

[0025] determine a first number of the second target spinneret and a second number of the third target spinneret, the third spinneret being a spinneret with overflow and abnormal fiber ejection form;

[0026] determine a second abnormality score of each third target spinneret based on the area of the overflow of the third spinneret and the first abnormality score;

[0027] determine a second abnormality score average value of the second abnormality score of all the third target spinneret;

[0028] determine a third abnormality score of the spinneret as a whole based on the total area, the first number, the second number and the second abnormality score average value;

[0029] determine a fourth abnormality score of the filter screen based on the filter screen usage time length and the spinneret time length;

[0030] determine the usage progress of the filter screen based on the third abnormality score and the fourth abnormality score.

[0031] In another possible implementation manner, the determining the usage progress of the filter screen based on the third abnormality score and the fourth abnormality score comprises:

[0032] determine a total abnormality score based on the third abnormality score, the fourth abnormality score and respective corresponding weights;

[0033] determine the usage progress of the filter screen based on the total abnormality score and a preset function.

[0034] In another possible implementation manner, the method further includes:

[0035] If the use progress reaches a preset progress threshold, prompt information is output.

[0036] In a second aspect, the application provides a multi-stage gradient filtration spinneret for an alumina precursor solution, which adopts the following technical solution:

[0037] The multi-stage gradient filtration spinneret for the alumina precursor solution comprises a base, a spinneret arranged on the base, a first camera device arranged on the spinneret, and a second camera device arranged on the spinneret.

[0038] A plurality of rows of spinneret holes are arranged on the spinneret, and the plurality of rows of spinneret holes are arranged in a ring shape.

[0039] The plurality of rows of spinneret holes are located between the first camera device and the second camera device, and the second camera device is located at the center of the spinneret.

[0040] A plurality of slots are arranged on the base, and different filtration precision filtration screens are sequentially arranged in the plurality of slots.

[0041] The first camera device and the second camera device collect video information at each spinneret hole and send the video information to an electronic device, so that the electronic device obtains the video information at each spinneret hole on the spinneret, the use duration of the filtration screen, and the spinning duration of continuous spinning, determines a first target spinneret hole with overflow around the spinneret hole from the video information, determines the form of the fiber spun out of the spinneret hole from the video information, and determines a second target spinneret hole with abnormal form, and determines the use progress of the filtration screen based on the first target spinneret hole, the second target spinneret hole, the use duration of the filtration screen, and the spinning duration.

[0042] By adopting the above technical solution, the first camera device and the second camera device are arranged on the outer side and the inner side of the plurality of rows of spinneret holes of the spinneret, so that the video information at each spinneret hole can be more comprehensively and in detail collected, a plurality of slots are arranged on the base, and different filtration precision filtration screens are sequentially arranged in each slot, so that different sizes of impurities can be comprehensively filtered out, the influence on the spun fiber and the spinneret hole is reduced, and after the electronic device obtains the video information, the first target spinneret hole, the second target spinneret hole, and the third target spinneret hole are determined according to the record and description of the first aspect, and the use progress of the accurate filtration screen is comprehensively determined according to the first target spinneret hole, the second target spinneret hole, the third target spinneret hole, the use duration of the filtration screen, and the spinning duration, so that the filtration screen can be replaced by the staff when the filtration screen reaches the set use progress.

[0043] In another possible implementation manner, the number of the first camera devices is four, and the four first camera devices are uniformly distributed along the center of the spinneret at equal angles.

[0044] In another possible implementation manner, a micro motor is arranged at the center of the spinneret, and the second camera device is located on an output shaft of the micro motor.

[0045] In another possible implementation manner, a plurality of supporting blocks are arranged on the base, each supporting block is located between two adjacent slots, and each supporting block is connected to the sidewall of the base through a connecting sheet.

[0046] In a third aspect, the present application provides an electronic device, which adopts the technical scheme as follows:

[0047] An electronic device, comprising:

[0048] at least one processor;

[0049] a memory;

[0050] at least one application program, wherein the at least one application program is stored in the memory and is configured to be executed by the at least one processor, and the at least one processor is configured to execute the multi-stage gradient filtration control method of the alumina precursor solution according to any one of the possible implementation manners of the first aspect.

[0051] In a fourth aspect, the present application provides a computer readable storage medium, which adopts the technical scheme as follows:

[0052] A computer readable storage medium, when the computer program is executed in the computer, the computer executes the multi-stage gradient filtration control method of the alumina precursor solution according to any one of the first aspect.

[0053] In summary, the present application includes at least one of the following beneficial technical effects:

[0054] The video information of each spinning hole of the spinneret is obtained, so as to know the specific situation of spinning of each spinning hole. The use time of the filter screen and the spinning time of the spinneret are obtained, so as to analyze the use progress of the filter screen. The first target spinning hole and the second target spinning hole are determined from the video information. The first target spinning hole has overflow around it, which is caused by foreign matter entering the spinning hole and affecting spinning. The second target spinning hole is a spinning hole completely blocked by foreign matter. The first target spinning hole and the second target spinning hole represent the use condition and use progress of the filter screen to some extent. The form of the fiber spun from each spinning hole in the video information is determined. The form is the form of the fiber spun when the spinning hole works. If the form is abnormal, it means that the spinning hole is affected by foreign matter. Therefore, the third target spinning hole with abnormal form is determined. Finally, the use progress of the filter screen is determined according to the first target spinning hole, the second target spinning hole, the third target spinning hole, the use time of the filter screen and the spinning time, so that the filter screen can be replaced when the filter screen reaches the set use progress. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 FIG. 1 is a flowchart of a multistage gradient filtration control method of an alumina precursor solution according to an embodiment of the present application.

[0056] Figure 2 FIG. 2 is a structural diagram of a spinneret controlled by a multistage gradient filtration control method of an alumina precursor solution according to an embodiment of the present application.

[0057] Figure 3 FIG. 3 is a sectional view of a spinneret controlled by a multistage gradient filtration control method of an alumina precursor solution according to an embodiment of the present application.

[0058] Figure 4 FIG. 4 is a structural diagram of an electronic device according to an embodiment of the present application.

[0059] The drawings show that: 1, base; 11, slot; 2, spinneret; 21, spinning hole; 31, first camera device; 32, second camera device; 4, micro motor; 51, support block; 52, connecting piece; 6, electronic device; 61, processor; 62, bus; 63, memory; 64, transceiver. DETAILED DESCRIPTION

[0060] The present application will be further described in detail below with reference to the drawings.

[0061] Those skilled in the art can make modifications to the present embodiment without creative contribution after reading the present specification, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

[0062] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0063] In addition, the term "and / or" in the present application is only used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects unless otherwise specified.

[0064] The embodiments of the present application will be described in further detail below with reference to the drawings of the specification.

[0065] The embodiments of the present application provide a multi-stage gradient filtration control method of an alumina precursor solution, which is executed by an electronic device, which can be a server or a terminal device. The server can be a physical server, a server cluster composed of multiple physical servers or a distributed system, or a cloud server providing cloud computing services. The terminal device can be a smart phone, a tablet computer, a notebook computer, a desktop computer, etc., but is not limited thereto. The terminal device and the server can be directly or indirectly connected through wired or wireless communication, and the embodiments of the present application do not limit this. As shown in FIG. 1, the method comprises steps S101, S102, S103 and S104, wherein, Figure 1

[0066] S101, acquiring video information at each spinning hole of a spinneret, usage time length of a filter screen and spinning time length of continuous spinning.

[0067] For the embodiments of the present application, refer to Figure 2 and Figure 3 ​The spinneret 2 is circular, and a plurality of rows of spinneret holes 21 are arranged on the surface of the spinneret 2. The plurality of rows of spinneret holes 21 are annularly distributed. A plurality of first camera devices 31 can be arranged on the spinneret 2. The plurality of first camera devices 31 are located outside the plurality of rows of spinneret holes 21. Specifically, the number of the first camera devices 31 can be four. The four first camera devices 31 are equiangularly distributed along the center of the spinneret 2. A second camera device 32 is arranged at the center of the spinneret 2. The second camera device 32 can be a panoramic camera or a common camera. If the second camera device 32 is a common camera, a micro motor 4 can be arranged at the center of the spinneret 2. The second camera device 32 is fixed to the output shaft of the micro motor 4. The micro motor 4 is connected to a power supply. The micro motor 4 rotates, and the second camera device 32 rotates. The second camera device 32 collects video information of the plurality of rows of spinneret holes 21 from the inside of the plurality of rows of spinneret holes 21. The first camera devices 31 collect video information of the plurality of rows of spinneret holes 21 from the outside of the plurality of rows of spinneret holes 21. Therefore, the video information is more comprehensive, and each spinneret hole 21 can be covered.

[0068] When the staff replaces the filter screen, the staff can input the replacement time point of the filter screen into the electronic device through the visual operation interface. The electronic device can collect the current time through a local clock or the Internet, and then subtract the replacement time point of the filter screen from the current time to obtain the use time length of the filter screen. Because there are different sizes of foreign matters in the alumina precursor spinning solution, different filter screens with different filtering precision need to be combined to obtain a multi-stage gradient filter screen. Similarly, the electronic device can be connected to a spinning device such as a spinning box through a wire. When it is detected that the spinning box starts to operate, the starting operation time point is recorded, and the continuous spinning time length is obtained by subtracting the operation time point from the current time.

[0069] S102, determine the first target spinneret hole with overflow around the spinneret hole and the second target spinneret hole with blockage from the video information.

[0070] For the embodiment of the present application, the video information records the specific performance of each spinneret hole during spinning. Therefore, the electronic device can determine the first target spinneret hole with overflow around the spinneret hole by analyzing the video information. The overflow around the spinneret hole indicates that foreign matters enter the spinneret hole, which affects the extrusion of the spinning solution from the spinneret hole, and then overflow occurs. The spinning solution cools down to form overflow around the spinneret hole. Therefore, the filter screen filtering condition and use progress can be analyzed according to the determined first target spinneret hole. The second target spinneret hole is the spinneret hole with blockage. The spinneret hole is blocked because foreign matters enter the spinneret hole. Therefore, the filter screen filtering condition and use progress can be analyzed according to the determined second target spinneret hole.

[0071] Specifically, the electronic device can input the video information into the trained network model for foreign matter detection, so as to identify whether there is overflow around the spinneret. Or by performing edge detection on the video information, whether there is overflow around the spinneret is analyzed. The electronic device can input the video information into the trained network model for fiber feature detection, so as to identify the blocked spinneret, i.e., the second target spinneret. The network model can be a convolutional neural network model or a recurrent neural network model.

[0072] S103, determining the shape of the fiber jetted from the spinneret from the video information, and determining a third target spinneret with abnormal shape.

[0073] For the embodiments of the present application, the electronic device analyzes the video information to determine the shape of the fiber jetted from each spinneret. After the electronic device determines the second target spinneret that is blocked, it no longer analyzes the shape of the fiber jetted from the second target spinneret. The shape of the fiber jetted from the spinneret also indicates whether the spinneret is running abnormally, so the electronic device determines a third target spinneret with abnormal shape. The abnormal shape of the fiber jetted from the spinneret indicates that foreign matter has entered the spinneret, which affects the shape of the fiber jetted from the spinneret. Therefore, determining the third target spinneret also facilitates the analysis of the filtering condition and the use progress of the filter screen.

[0074] S104, determining the use progress of the filter screen based on the first target spinneret, the second target spinneret, the third target spinneret, the use time length of the filter screen, and the jetting time length.

[0075] In summary, the first target spinneret, the second target spinneret, the third target spinneret, the use time length of the filter screen, and the continuous jetting time length of the spinneret are all key factors affecting the use condition and use progress of the filter screen. Therefore, the electronic device can determine the accurate use progress of the filter screen by comprehensively analyzing the above five factors. After the electronic device determines the accurate use progress, the staff can timely replace the filter screen that reaches the set use progress.

[0076] In one possible implementation of the embodiments of the present application, step S103 of determining the shape of the fiber jetted from the spinneret from the video information, and determining a third target spinneret with abnormal shape, specifically includes step S1031 (not shown in the figure), step S1032 (not shown in the figure), step S1033 (not shown in the figure), step S1034 (not shown in the figure), and step S1035 (not shown in the figure), wherein,

[0077] S1031, determining the fiber features of each spinneret jetted in each frame of the video information.

[0078] For the embodiment of the present application, the electronic device parses each frame of picture from the video information, first performs denoising processing on each frame of picture, then performs gray scale transformation on each frame of picture after denoising to obtain a gray scale image, then determines the position where the gray scale value jumps from the gray scale image to further determine the edge profile of the fiber feature spouted by each spinneret hole in each frame of picture, and the edge profile is the fiber feature spouted by each spinneret hole in each frame of picture.

[0079] S1032, determine the width of the fiber feature, and perform curve fitting on the fiber feature to obtain a curve line representing the spouting shape of the fiber feature.

[0080] For the embodiment of the present application, the electronic device counts the number of pixels in the width direction of the fiber feature at each position to obtain the width in the width direction at each position, then averages the width at each position to obtain a width average value, and the width average value represents the width of the fiber feature more accurately. The greater the difference between the width and the standard width of the spouted fiber, the greater the possibility of abnormal spouting shape of the fiber. The electronic device performs approximate fitting on the edge profile of the fiber feature to obtain a curve line representing the spouting shape of the fiber feature. It is more convenient to analyze the third target spinneret hole with abnormal shape through the curve line.

[0081] S1033, determine the first similarity between the curve line corresponding to each spinneret hole in each frame of picture and a preset curve line, and calculate the second similarity between the curve lines corresponding to each spinneret hole in adjacent two frames of picture.

[0082] For the embodiment of the present application, the electronic device calculates the similarity between the curve line of each spinneret hole in each frame of picture and the preset curve line to obtain the first similarity. The preset curve line represents the curve line when the spouted fiber shape is normal, and the electronic device can calculate the Euclidean distance (point-by-point difference square sum) or cosine similarity between the curve line and the preset curve line to obtain the first similarity. The electronic device can calculate the second similarity between the curve lines of each spinneret hole in adjacent two frames of picture in the same way. The first similarity represents the closeness between the spouted fiber shape in each frame of picture and the standard spouted fiber shape. The higher the first similarity, the more normal the spouting fiber shape of the spinneret hole. The higher the second similarity, the more stable the spouted fiber shape over time, the smaller the change amplitude, and the more normal the spouting fiber shape of the spinneret hole.

[0083] S1034, determine the first abnormal score of each spinneret hole based on the first similarity, the second similarity, and the width of the fiber feature.

[0084] For the embodiment of the present application, in summary, the first similarity, the second similarity, and the width are all key factors affecting whether the spouting fiber shape of the spinneret hole is abnormal, so the electronic device determines the first abnormal score representing the abnormal degree of each spinneret hole according to the first similarity and the above three factors.

[0085] S1035, determine the spinneret whose first abnormal score reaches the preset score threshold as the third target spinneret.

[0086] For the embodiments of the present application, the preset score threshold is a critical point for determining whether the abnormality degree of the fiber jetted by the spinneret is too large. The electronic device compares the first abnormal score of each spinneret with the preset score threshold to determine the spinneret reaching the preset score threshold, and the spinneret reaching the preset score threshold indicates that the abnormality degree of the fiber jetted by the spinneret is too large, which is the third target spinneret with abnormal fiber form. The third target spinneret is determined more accurately through the comprehensive analysis of the first similarity, the second similarity and the width.

[0087] In one possible implementation of the embodiments of the present application, the step S1034 of determining the first abnormal score of each spinneret based on the first similarity, the second similarity and the width of the fiber feature includes steps Sa (not shown in the figure), step Sb (not shown in the figure), step Sc (not shown in the figure) and step Sd (not shown in the figure), wherein,

[0088] Sa, determine the first similarity average value of each spinneret based on the first similarity of each frame of each spinneret.

[0089] For the embodiments of the present application, the electronic device calculates the first similarity average value of each spinneret through the average value calculation formula based on the first similarity of all frames of each spinneret. The first similarity average value represents the closeness of the overall fiber form jetted by the spinneret to the standard fiber form in the process of the fiber form changing over time. The higher the first similarity average value is, the more normal the operation of the spinneret is, and the more normal the fiber form jetted by the spinneret is.

[0090] Sb, determine the second similarity variance of each spinneret based on the second similarity of all adjacent two frames of each spinneret.

[0091] For the embodiments of the present application, the electronic device calculates the second similarity variance of each spinneret through the variance calculation formula based on the second similarity of all adjacent two frames of each spinneret. The greater the second similarity variance is, the more dramatic the change of the fiber form jetted by the spinneret in the process of the fiber form changing over time is, the more unstable the fiber form is, the more abnormal the operation of the spinneret is, and the more abnormal the fiber form jetted by the spinneret is.

[0092] Sc, determine the difference between the width of the fiber feature and the preset width, and determine the product of the second similarity variance and the difference.

[0093] For the embodiments of the present application, the preset width is taken as the standard width of the fiber jetted out of the spinneret, the electronic device obtains the difference between the width of the fiber jetted out of each spinneret and the preset width by subtracting the preset width and taking the absolute value, the greater the difference, the greater the difference between the width of the fiber jetted out and the standard width, the more serious the influence of the foreign matter in the spinneret, the more abnormal the operation of the spinneret, and the more abnormal the shape of the fiber jetted out. The electronic device obtains the product by multiplying the second similarity variance by the difference. The greater the product, the more abnormal the operation of the spinneret and the more abnormal the shape of the fiber jetted out.

[0094] Sd, determine the ratio of the product to the first similarity average value.

[0095] Wherein, the ratio represents the first abnormal score of each spinneret.

[0096] For the embodiments of the present application, the electronic device obtains the ratio by dividing the product obtained in step Sc by the first similarity average value, the product is the numerator, and the first similarity average value is the denominator, so the greater the ratio, the greater the abnormality of the spinneret. Conversely, the smaller the abnormality. The ratio is more accurate to represent the first abnormal score of each spinneret.

[0097] In one possible implementation of the embodiments of the present application, the usage progress of the filter screen is determined based on the first target spinneret, the second target spinneret, the third target spinneret, the usage time length of the filter screen, and the spinning time length in step S104, and specifically includes steps S1041 (not shown in the figure), S1042 (not shown in the figure), S1043 (not shown in the figure), S1044 (not shown in the figure), S1045 (not shown in the figure), S1046 (not shown in the figure), and S1047 (not shown in the figure), wherein,

[0098] S1041, determine the area of the overflow around the first target spinneret, and determine the total area of the overflow around all the first target spinnerets.

[0099] For the embodiments of the present application, the electronic device performs edge detection on each first target spinneret and the surrounding area in the video information to obtain the contour of the overflow around each first target spinneret, counts the number of pixels in the contour range to obtain the area of the overflow around each first target spinneret, that is, the number of pixels in the contour range represents the area. The greater the area, the more serious the overflow of the spinneret, and the greater the total area obtained by summing the areas of the overflow around all the first target spinnerets, the more serious the overflow of the spinneret as a whole, and the worse the filtering effect of the filter screen, and the closer the usage progress of the filter screen to the upper limit.

[0100] S1042, determine the first number of the second target spinneret and the second number of the third target spinneret.

[0101] The third spinneret is a spinneret with overflow and abnormal fiber ejection.

[0102] For the embodiments of the present application, the greater the first number of the second target spinneret, the more spinnerets are blocked, the more the foreign matter passing through the filter screen affects the spinnerets on the spinneret plate, the worse the filtering effect of the filter screen, and the closer the use progress of the filter screen to the upper limit. The third target spinneret is a spinneret with overflow and abnormal fiber ejection, and such a spinneret is at the critical point of being blocked. The greater the second number of the third target spinneret, the more the foreign matter passing through the filter screen affects the spinnerets on the spinneret plate, the worse the filtering effect of the filter screen, and the closer the use progress to the upper limit.

[0103] S1043, determining a second abnormal score of each third target spinneret based on the area of overflow of the third spinneret and the first abnormal score.

[0104] For the embodiments of the present application, the area of overflow and the first abnormal score are both key factors affecting the abnormal degree of the third target spinneret. Therefore, the staff can set the respective coefficients of the area and the first abnormal score and store them in the local storage medium in the electronic device. The electronic device can obtain the second abnormal score of each third target spinneret by weighting the area and the first abnormal score with the respective coefficients.

[0105] S1044, determining a second abnormal score average of the second abnormal scores of all the third target spinnerets.

[0106] For the embodiments of the present application, the electronic device calculates the second abnormal score average of the second abnormal scores of all the third target spinnerets by the average value calculation formula. The greater the second abnormal score average, the more serious the abnormal degree of all the third target spinnerets as a whole, and the higher the abnormal degree of the spinneret plate as a whole, and the more serious the influence of the foreign matter passing through the filter screen.

[0107] S1045, determining a third abnormal score about the spinneret plate as a whole based on the total area, the first number, the second number, and the second abnormal score average.

[0108] For the embodiments of the present application, in summary, the total area of the overflow on the spinneret, the first number, the second number, and the average value of the second abnormality score are all key factors affecting the overall abnormality degree of the spinneret, i.e., key factors affected by foreign matter. The staff can set respective corresponding coefficients for the total area, the first number, the second number, and the average value of the second abnormality score and store them in the local storage medium in the electronic device, and the electronic device calls the respective corresponding coefficients to perform weighted calculation on the total area, the first number, the second number, and the average value of the second abnormality score to obtain a third abnormality score about the overall abnormality degree of the spinneret (affected by foreign matter). The third abnormality score of the spinneret as a whole is more accurate through comprehensive determination of factors such as the total area of the overflow.

[0109] S1046, determining a fourth abnormality score about the filter screen based on the filter screen use duration and the spinning duration.

[0110] For the embodiments of the present application, the longer the use duration of the filter screen, the greater the probability that the filter screen reaches the use upper limit. The greater the spinning duration of the spinneret, the more seriously affected by foreign matter passing through the filter screen, the worse the filtering effect of the filter screen, and the greater the probability of reaching the use upper limit. Therefore, the staff can set respective corresponding coefficients for the use duration and the spinning duration and store them, and the electronic device calls the respective corresponding coefficients to perform weighted calculation on the filter screen use duration and the spinning duration to obtain a fourth abnormality score representing the filtering effect of the filter screen. The greater the fourth abnormality score, the worse the filtering effect of the filter screen, and the greater the probability of approaching the use upper limit.

[0111] S1047, determining the use progress of the filter screen based on the third abnormality score and the fourth abnormality score.

[0112] In summary, the third abnormality score and the fourth abnormality score are both key factors representing the use progress of the filter screen, so the electronic device can accurately determine the use progress of the filter screen by comprehensively analyzing the third abnormality score and the fourth abnormality score.

[0113] In one possible implementation of the embodiments of the present application, in step S1047, the use progress of the filter screen is determined based on the third abnormality score and the fourth abnormality score, specifically including step one and step two, wherein,

[0114] Step one, determining a total abnormality score based on the third abnormality score, the fourth abnormality score, and respective corresponding weights.

[0115] For the embodiments of the present application, the third abnormality score and the fourth abnormality score are both key factors affecting the use progress of the filter screen, i.e., key factors of the abnormality degree of the filter screen. The staff sets respective corresponding weights for the third abnormality score and the fourth abnormality score, and stores the weights in the electronic device, and the electronic device calls the respective corresponding coefficients to perform weighted calculation on the third abnormality score and the fourth abnormality score to obtain a total abnormality score.

[0116] Step two, determining the use progress of the filter screen based on the total abnormal score and a preset function.

[0117] For the embodiment of the present application, the total abnormal score is the score representing the use progress, so the staff can obtain the preset function in advance according to a large number of experiments and calculations. The preset function is a function for determining the use progress of the filter screen through the total abnormal score. The electronic device substitutes the total abnormal score into the preset function to calculate the use progress of the filter screen.

[0118] In one possible implementation of the embodiment of the present application, step S104 is followed by step S105 (not shown in the figure), in which,

[0119] S105, if the use progress reaches a preset progress threshold, outputting a prompt information.

[0120] For the embodiment of the present application, the preset progress threshold is a critical point when the use progress of the filter screen reaches the upper limit. The electronic device compares the determined use progress with the preset progress threshold. If the preset progress threshold is reached, it means that the filter screen reaches the use upper limit and needs to be replaced. The electronic device can send a short message text information of "filter screen needs to be replaced" to the terminal device of the staff, or control the alarm device such as the indicator light and the buzzer to work to output the prompt information. Through the output of the prompt information, the staff can know in time that the filter screen reaches the use upper limit, and then replace it in time, reducing the influence of foreign matters on the quality of the sprayed fibers.

[0121] The above embodiment introduces the multi-stage gradient filtration control method of the alumina precursor solution from the perspective of method flow. The following embodiment introduces a multi-stage gradient filtration spinneret for the alumina precursor solution. For details, see the following embodiment.

[0122] The embodiment of the present application provides a multi-stage gradient filtration spinneret for the alumina precursor solution, such as Figure 2 and Figure 3As shown, the multi-stage gradient filtration spinneret 2 of the alumina precursor solution can specifically include a base 1 and a spinneret 2, the spinneret 2 is circular, a plurality of rows of spinneret holes 21 are arranged on the spinneret 2, and the plurality of rows of spinneret holes 21 are arranged in a ring shape. The base 1 and the spinneret 2 can be threadedly connected, and the base 1 is fixed on a spinning device such as a spinning box. A plurality of first camera devices 31 are further fixedly connected to the spinneret 2, specifically four first camera devices 31, the four first camera devices 31 are located on the outside of the plurality of rows of spinneret holes 21, and the four first camera devices 31 are distributed at equal angles along the center of the spinneret 2. The first camera device 31 faces the spinneret hole 21, and one first camera device 31 corresponds to collecting video information of the spinneret hole 21 within a range of 90°. A second camera device 32 is arranged at the center of the spinneret 2, the second camera device 32 can be a panoramic camera, or the second camera device 32 can be a common camera, if the second camera device 32 is a common camera, a micro motor 4 can be arranged at the center, the second camera device 32 is fixed on the output shaft of the micro motor 4, the micro motor 4 is connected with a power supply through wires, so as to supply power to the micro motor 4. The micro motor 4 drives the second camera device 32 to rotate, so that the second camera device 32 collects video information of the spinneret hole 21 from the inside of the plurality of rows of spinneret holes 21, and the first camera device 31 and the second camera device 32 are double collected, so as to collect video information of each spinneret hole 21 in detail and comprehensively. The first camera device 31 and the second camera device 32 collect video information at each spinneret hole 21, and the electronic device is wirelessly connected with the first camera device 31 and the second camera device 32, so that the electronic device 6 obtains the video information, and then the electronic device 6 accurately determines the use progress of the filter screen according to the content recorded in the above method embodiment.

[0123] Referring to Figure 2 and Figure 3 , a plurality of insertion slots 11 are arranged on the base 1, the plurality of insertion slots 11 are used to place filter screens with different filtering accuracies, so as to realize multi-gradient filtration. A support block 51 is arranged between each adjacent two insertion slots 11, and the support block 51 is fixedly connected with the inner side of the base 1 through a connecting piece 52. When the filter screen is inserted into the insertion slot 11, the filter screen abuts against the support block 51, and the spinning solution passes through the filter screen under the action of pressure, the filter screen deforms under the action of force, but under the action of the support block 51, the filter screen in contact with the support block 51 is pushed by the support block 51, the deformation of the filter screen is reduced, the filter screen is not easy to be damaged, and the use durability of the filter screen is improved.

[0124] In the embodiment of the present application, an electronic device is provided, as shown in Figure 4 , Figure 4The electronic device 6 shown includes a processor 61 and a memory 63. The processor 61 and the memory 63 are connected, such as through a bus 62. Optionally, the electronic device 6 can also include a transceiver 64. It should be noted that the transceiver 64 is not limited to one in actual applications, and the structure of the electronic device 6 does not constitute a limitation on the embodiments of the present application.

[0125] The processor 61 can be a CPU (Central Processing Unit, central processor), a general-purpose processor, a DSP (Digital Signal Processor, data signal processor), an ASIC (Application Specific Integrated Circuit, application specific integrated circuit), an FPGA (Field Programmable Gate Array, field programmable gate array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in combination with the disclosure of the present application. The processor 61 can also be a combination of computing functions, such as one or more microprocessor combinations, combinations of DSP and microprocessor, etc.

[0126] The bus 62 can include a channel for transmitting information between the above-mentioned components. The bus 62 can be a PCI (Peripheral Component Interconnect, peripheral component interconnect) bus or an EISA (Extended Industry Standard Architecture, extended industry standard architecture) bus, etc. The bus 62 can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 4 In the figure, only one thick line is used to represent, but it does not mean that there is only one bus or one type of bus.

[0127] The memory 63 can be a ROM (Read Only Memory) or other type of static storage device that can store static information and instructions, a RAM (Random Access Memory) or other type of dynamic storage device that can store information and instructions, an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical disk storage, a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

[0128] The memory 63 is configured to store application program codes for implementing the solutions of the present application, and the processor 61 is configured to control the execution of the application program codes. The processor 61 is configured to execute the application program codes stored in the memory 63 to implement the content shown in the foregoing method embodiments.

[0129] The electronic device includes, but is not limited to, a mobile terminal such as a mobile phone, a notebook computer, a digital broadcast receiver, a PDA (Personal Digital Assistant), a PAD (Tablet Personal Computer), a PMP (Portable Multimedia Player), a car terminal (e.g., a car navigation terminal), and the like, and a stationary terminal such as a digital TV, a desktop computer, and the like. It can also be a server or the like. Figure 4 The electronic device shown is merely an example and should not impose any limitation on the functions and use range of the embodiments of the present application.

[0130] The computer readable storage medium provided in the embodiment of the present application stores a computer program, and when the computer program runs on a computer, the computer can execute the corresponding content in the foregoing method embodiment. Compared with the related art, the video information at each spinning hole of the spinneret is acquired in the embodiment of the present application, which facilitates knowing the specific situation of spinning at each spinning hole. The use time length of the filter screen and the spinning time length of the continuous spinning of the spinneret facilitate subsequent analysis of the use progress of the filter screen. The first target spinning hole and the second target spinning hole are determined from the video information. The first target spinning hole has overflow around it, which belongs to the adverse effect of foreign matter entering the spinning hole on spinning. The second target spinning hole is a spinning hole completely blocked by foreign matter. The first target spinning hole and the second target spinning hole both represent the use condition and use progress of the filter screen to some extent. The form of the fiber spun from each spinning hole in the video information is determined. The form is the form of the fiber spun when the spinning hole works. If the form is abnormal, it means that the spinning hole is affected by foreign matter. Therefore, the third target spinning hole with an abnormal form is determined. Finally, the accurate use progress of the filter screen is determined according to the first target spinning hole, the second target spinning hole, the third target spinning hole, the use time length of the filter screen and the spinning time length, so that the filter screen can be replaced by the staff when the filter screen reaches the set use progress.

[0131] It should be understood that, although each step in the flowchart of the accompanying drawings is shown in sequence according to the direction of the arrow, these steps are not necessarily executed in sequence according to the direction of the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and they can be executed in other sequences. Moreover, at least part of the steps in the flowchart of the accompanying drawings can include multiple sub-steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence is not necessarily sequential, but can be executed alternately or alternately with at least part of other steps or sub-steps or stages of other steps.

[0132] The above is only some embodiments of the present application. It should be pointed out that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the present application.

Claims

1. A multi-stage gradient filtration control method for alumina precursor solutions, characterized in that, include: Acquire video information at each spinneret hole on the spinneret, the usage time of the filter screen, and the continuous spinnereting time; The video information identified a first target spinneret with overflow around it and a second target spinneret that was blocked. The shape of the fibers ejected from the spinneret is determined from the video information, and a third target spinneret with an abnormal shape is identified. The usage progress of the filter screen is determined based on the first target spinneret, the second target spinneret, the third target spinneret, the filter screen usage time, and the spinneret duration.

2. The multi-stage gradient filtration control method for alumina precursor solution according to claim 1, characterized in that, Determining the shape of the fibers ejected from the spinneret from the video information, and identifying a third target spinneret with an abnormal shape, includes: Determine the fiber characteristics ejected from each spinneret in each frame of the video information; The width of the fiber feature is determined, and curve fitting is performed on the fiber feature to obtain a curve bar characterizing the ejection morphology of the fiber feature; Determine the first similarity between the curve corresponding to each spinneret in each frame and the preset curve, and calculate the second similarity between the curve corresponding to each spinneret in two adjacent frames; A first anomaly score is determined for each spinneret based on the first similarity, the second similarity, and the width of the fiber feature; The spinneret that has reached the preset score threshold is identified as the third target spinneret.

3. The multi-stage gradient filtration control method for alumina precursor solution according to claim 2, characterized in that, The determination of the first anomaly score for each spinneret based on the first similarity, the second similarity, and the width of the fiber characteristics includes: The first similarity average value for each spinneret hole is determined based on the first similarity of each frame. The second similarity variance for each spinneret hole is determined based on the second similarity of all two adjacent frames for each spinneret hole; Determine the difference between the width of the fiber feature and the preset width, and determine the product of the second similarity variance and the difference; Determine the ratio of the product to the first similarity average value, the ratio representing the first anomaly score of each spinneret orifice.

4. The multi-stage gradient filtration control method for alumina precursor solution according to claim 3, characterized in that, The process of determining the usage progress of the filter screen based on the first target spinneret, the second target spinneret, the third target spinneret, the filter screen usage time, and the spinneret duration includes: Determine the area of ​​the spill around the first target spinneret orifice, and determine the total area of ​​the spill around all the first target spinneret orifices; Determine the first number of second target spinnerets and the second number of third target spinnerets, wherein the third target spinnerets are spinnerets that have overflow and whose ejected fibers have abnormal shapes; The second anomaly score for each third target spinneret is determined based on the area of ​​the overflow from the third target spinneret and the first anomaly score. Determine the average of the second anomaly scores for all third target spinnerets; A third abnormal score is determined for the spinneret as a whole based on the total area, the first quantity, the second quantity, and the average of the second abnormal scores; A fourth anomaly score for the filter is determined based on the filter usage time and the spinning time. The usage progress of the filter screen is determined based on the third and fourth anomaly scores.

5. The multi-stage gradient filtration control method for alumina precursor solution according to claim 4, characterized in that, The process of determining the usage progress of the filter screen based on the third and fourth anomaly scores includes: The total anomaly score is determined based on the third anomaly score, the fourth anomaly score, and their respective weights. The usage progress of the filter is determined based on the total anomaly score and a preset function.

6. The multi-stage gradient filtration control method for alumina precursor solution according to claim 1, characterized in that, The method further includes: If the usage progress reaches a preset progress threshold, a prompt message will be output.

7. A multi-stage gradient filter spinneret for alumina precursor solutions, characterized in that: Includes a base, a spinneret mounted on the base, a first camera device mounted on the spinneret, and a second camera device mounted on the spinneret. The spinneret has multiple rows of spinneret holes arranged in a ring shape. The multiple rows of spinneret holes are located between the first camera device and the second camera device, with the second camera device located at the center of the spinneret plate. The base is provided with multiple slots, and filters with different filtration precisions are placed in the multiple slots in sequence. The first camera device and the second camera device collect video information at each spinneret hole and send the video information to an electronic device, so that the electronic device can obtain the video information at each spinneret hole on the spinneret plate, the usage time of the filter screen, and the continuous spinneret duration. From the video information, the electronic device determines the first target spinneret hole where there is overflow around the spinneret hole, determines the shape of the fiber ejected from the spinneret hole, and determines the second target spinneret hole with an abnormal shape. Based on the first target spinneret hole, the second target spinneret hole, the usage time of the filter screen, and the spinneret duration, the electronic device determines the usage progress of the filter screen.

8. The multi-stage gradient filter spinneret for the alumina precursor solution according to claim 7, characterized in that: The number of the first camera devices is four, and the four first camera devices are evenly distributed at equal angles along the center of the spinneret.

9. The multi-stage gradient filter spinneret for the alumina precursor solution according to claim 7, characterized in that: A miniature motor is located at the center of the spinneret, and the second camera device is located on the output shaft of the miniature motor.

10. The multi-stage gradient filter spinneret for the alumina precursor solution according to claim 7, characterized in that: The base is provided with multiple support blocks, each support block is located between two adjacent slots, and each support block is connected to the side wall of the base through a connecting piece.

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