Aluminum alloy smelting temperature control method and system

Abstract

The present invention belongs to the field of intelligent control technology, and specifically relates to a method and system for controlling the temperature of aluminum alloy smelting, the method comprising: dividing the temperature image of the smelting area in the smelting furnace into the influence area of ​​each combustion-supporting fan according to the position and parameters of each combustion-supporting fan set in the smelting area, obtaining the segmentation effect of super-pixel segmentation of the influence area by different size parameters, calculating the temperature uniformity of the influence area according to the target size with the largest segmentation effect and the segmentation effect of the target size, correcting the air inlet speed of the combustion-supporting fan according to the temperature uniformity, and obtaining the corrected air inlet direction of the combustion-supporting fan according to the grayscale distribution concentration of all pixel points in each super-pixel corresponding to the target size of the influence area, so as to control the smelting temperature of the smelting furnace. The present invention effectively avoids the uneven composition and structure of the aluminum alloy during the smelting process, and improves the product quality.

Description

Technical Field

[0001] The present invention relates to the field of intelligent control technology, and more specifically, to a method and system for controlling the temperature of aluminum alloy smelting. Background Art

[0002] Temperature control is an important parameter in the aluminum alloy smelting process and plays a vital role in the quality of aluminum alloy. Therefore, the melting temperature needs to be controlled.

[0003] In the related technology, for example, a Chinese patent document with authorization announcement number CN115049673B discloses a method and system for controlling the melting temperature of an aluminum ingot, including: obtaining a grayscale image of an infrared image of the aluminum ingot at a current moment, segmenting each aluminum ingot region in the grayscale image, obtaining the melting degree of the aluminum ingot at a current moment according to the proportion of the area of ​​each aluminum ingot region at a current moment to the area of ​​the aluminum ingot region at an initial moment, the temperature difference between the actual melting temperature value of the aluminum ingot region and the melting temperature, obtaining a predicted value of the area change of the aluminum ingot region at a next moment according to the area and temperature value of each aluminum ingot region at a current moment and the area change of the aluminum ingot region at a current moment, obtaining a predicted value of the temperature of the aluminum ingot region at a next moment according to the predicted value of the area change of each aluminum ingot region at a next moment, the area change of the aluminum ingot region at a current moment and the temperature change at a current moment, and controlling the furnace temperature at a next moment according to the predicted value of the temperature change of each aluminum ingot region at a next moment, the area change of the aluminum ingot region at a current moment and the temperature change at a current moment.

[0004] In the related art, only the temperature difference is relied upon to predict and control the melting temperature, while other factors affecting the quality of the aluminum alloy are ignored, which affects the accuracy of the melting temperature control. Summary of the invention

[0005] In order to solve the above-mentioned technical problem of relying solely on temperature difference to predict and control the melting temperature, ignoring other factors affecting the quality of aluminum alloy, and affecting the accuracy of melting temperature control, the present invention provides solutions in the following aspects.

[0006] In a first aspect, the present invention provides a method for controlling the temperature of aluminum alloy smelting, comprising: collecting a temperature image of a smelting area in a smelting furnace; dividing the temperature image into influence areas of each combustion-supporting fan according to the position and parameters of each combustion-supporting fan arranged in the smelting area, wherein the parameters of the combustion-supporting fan include an air inlet direction and an air inlet speed; performing superpixel segmentation on the influence area according to different size parameters, and taking the mean of the grayscale distribution concentration of all pixel points in all superpixels corresponding to different size parameters as the segmentation effect of different size parameters; taking the size parameter with the largest segmentation effect as the target size; and calculating the influence area according to the target size and the parameters of the combustion-supporting fan. The segmentation effect of the target size is calculated, and the temperature uniformity of the affected area is calculated, which is positively correlated with the target size and the segmentation effect of the target size. When the temperature uniformity is less than the preset threshold, the air inlet speed of the combustion-supporting fan is corrected according to the temperature uniformity to obtain the corrected air inlet speed of each combustion-supporting fan, and according to the grayscale distribution concentration of all pixel points in each superpixel corresponding to the target size of the affected area, the angle between the line connecting the center point of each superpixel and the position of the combustion-supporting fan and the vertical direction is weighted to obtain the corrected air inlet direction of the combustion-supporting fan, so as to control the smelting temperature of the smelting furnace.

[0007] The present invention calculates the temperature uniformity of the influence area of ​​each combustion-supporting fan. When the temperature uniformity of the influence area of ​​the combustion-supporting fan is poor, the air inlet speed of the combustion-supporting fan is corrected according to the temperature uniformity. According to the grayscale distribution concentration of all pixel points in each superpixel corresponding to the target size of the influence area, the angle between the line connecting the center point of each superpixel and the position of the combustion-supporting fan and the vertical direction is weighted to obtain the corrected air inlet direction of the combustion-supporting fan. By adjusting the air inlet speed and air inlet direction of each combustion-supporting fan, the smelting temperature of the smelting furnace is controlled, so that the smelting area of ​​the smelting furnace achieves a more uniform temperature distribution. Through precise temperature control, the uneven composition and structure of the aluminum alloy during the smelting process can be effectively avoided, thereby improving product quality and saving energy.

[0008] Preferably, the temperature image is divided into influence areas of each combustion-supporting fan according to the position and parameters of each combustion-supporting fan arranged in the smelting area, including: calculating the degree of influence of each combustion-supporting fan on each pixel point according to the position and parameters of each combustion-supporting fan arranged in the smelting area; for any pixel point in the temperature image, the combustion-supporting fan corresponding to the maximum value of the influence degree is taken as the combustion-supporting fan to which the pixel point belongs, and the pixel point is taken as the target pixel point of the combustion-supporting fan to which the pixel point belongs; for any combustion-supporting fan, the area composed of all target pixels of the combustion-supporting fan is taken as the influence area of ​​the combustion-supporting fan.

[0009] Taking into account that the multiple combustion-supporting fans arranged in the smelting area have different degrees of influence on different positions of the smelting area due to their different positions and parameters, the present invention divides the temperature image into the influence area of ​​each combustion-supporting fan according to the position and parameters of each combustion-supporting fan, which can more effectively control and optimize the temperature distribution in the smelting process.

[0010] Preferably, the degree of influence of each combustion-supporting fan on each pixel satisfies the expression: ; In the formula, Indicates that the coordinates of the i-th combustion-supporting fan are The influence degree of the pixel point, x represents the horizontal coordinate of the pixel point, y represents the vertical coordinate of the pixel point, The coordinates are The angle between the pixel point and the position of the i-th combustion-supporting fan and the air inlet direction of the i-th combustion-supporting fan, Indicates that the i-th combustion-supporting fan and the coordinates are The distance of the pixel point, represents the air inlet speed of the ith combustion-supporting fan, represents the sine function, Represents an exponential function with a natural constant as its base.

[0011] Preferably, the temperature image is divided into influence areas of each combustion-supporting fan according to the position and parameters of each combustion-supporting fan arranged in the smelting area, including: recording the line segment between the position of the i-th combustion-supporting fan and the position of the j-th combustion-supporting fan as the line segment ; Calculate the first distance according to the parameters of the i-th combustion-supporting fan and the j-th combustion-supporting fan; The position at which the distance from the position of the i-th combustion-supporting fan is equal to the first distance is taken as the segmentation position; the segmentation position is perpendicular to the line segment The straight line is used as the dividing line between the position of the i-th combustion-supporting fan and the position of the j-th combustion-supporting fan; the temperature image is divided according to the dividing line between the positions of every two combustion-supporting fans to obtain the influence area of ​​each combustion-supporting fan.

[0012] Preferably, the first distance satisfies the expression: ; In the formula, represents the first distance, , Respectively represent the air inlet direction of the i-th and j-th combustion-supporting fans, Represents a line segment The angle with the vertical direction, represents the cosine function, , denote the air inlet speeds of the i-th and j-th combustion-supporting fans, respectively. Represents the distance between the position of the i-th combustion-supporting fan and the position of the j-th combustion-supporting fan.

[0013] Preferably, the grayscale distribution concentration of all pixels refers to a normalized result of the information entropy of the grayscale values ​​of all pixels, and the normalized result of the information entropy of the grayscale values ​​of all pixels is inversely proportional to the information entropy of the grayscale values ​​of all pixels.

[0014] Preferably, the temperature uniformity of the affected area satisfies the expression: ; In the formula, represents the temperature uniformity of the ith affected area, represents the target size of the i-th impact area, represents the segmentation effect of the target size of the i-th impact area, and K2 represents the second preset value.

[0015] The target size of the impact area and the segmentation effect of the target size can reflect the distribution of the color characteristics of the pixels in the impact area. Therefore, by calculating the temperature uniformity of the impact area through the target size of the impact area and the segmentation effect of the target size, the obtained result is more accurate.

[0016] Preferably, the corrected air inlet speed of the combustion-supporting fan satisfies the expression: ; In the formula, represents the corrected air inlet speed of the ith combustion-supporting fan, represents the temperature uniformity of the ith affected area, Indicates the preset threshold value, Represents the air inlet speed of the i-th combustion-supporting fan.

[0017] When the melting temperature distribution in the melting area is uneven, the fuel combustion can be evenly distributed by increasing the air inlet speed of the combustion-supporting fan, thereby making the melting temperature distribution in the melting area even. This can effectively avoid the uneven composition and structure of the aluminum alloy during the melting process, thereby improving product quality and saving energy.

[0018] Preferably, the corrected air inlet direction of the combustion-supporting fan satisfies the expression: ; In the formula, represents the corrected air inlet direction of the i-th combustion-supporting fan, represents the total number of all superpixels corresponding to the target size of the i-th impact area, represents the grayscale distribution concentration of all pixels in the t-th superpixel corresponding to the target size of the ith impact area, represents the angle between the vertical direction and the line connecting the center point of the t-th superpixel corresponding to the target size of the ith impact area and the position of the ith combustion-supporting fan, Represents the sum of the grayscale distribution concentrations of all pixels in all superpixels corresponding to the target size of the i-th impact area.

[0019] When the melting temperature distribution in the melting area is uneven, the air inlet direction of the combustion-supporting fan is directed toward the super-pixel area with the more uneven temperature distribution, and the air inlet volume in the area with uneven temperature distribution is increased, so that the fuel in the area burns evenly, and the melting temperature distribution in the melting area is uniform. This can effectively avoid the uneven composition and structure of aluminum alloys during the melting process, thereby improving product quality and saving energy.

[0020] In a second aspect, the present invention provides an aluminum alloy smelting temperature control system, which adopts the following technical solution:

[0021] A temperature control system for aluminum alloy melting includes: a processor and a memory, wherein the memory stores computer program instructions, and when the computer program instructions are executed by the processor, the above-mentioned aluminum alloy melting temperature control method is implemented.

[0022] By adopting the above technical solution, the above-mentioned aluminum alloy smelting temperature control method is generated into a computer program and stored in a memory so as to be loaded and executed by a processor, thereby manufacturing a terminal device based on the memory and the processor for easy use.

[0023] The beneficial effects of the present invention are:

[0024] The present invention calculates the temperature uniformity of the influence area of ​​each combustion-supporting fan. When the temperature uniformity of the influence area of ​​the combustion-supporting fan is poor, the air inlet speed of the combustion-supporting fan is corrected according to the temperature uniformity. According to the grayscale distribution concentration of all pixel points in each superpixel corresponding to the target size of the influence area, the angle between the line connecting the center point of each superpixel and the position of the combustion-supporting fan and the vertical direction is weighted to obtain the corrected air inlet direction of the combustion-supporting fan. By adjusting the air inlet speed and air inlet direction of each combustion-supporting fan, the smelting temperature of the smelting furnace is controlled, so that the smelting area of ​​the smelting furnace achieves a more uniform temperature distribution. Through precise temperature control, the uneven composition and structure of the aluminum alloy during the smelting process can be effectively avoided, thereby improving product quality and saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other purposes, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the detailed description below through the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0026] Figure 1 The figure is a flow chart schematically showing a method for controlling the temperature of aluminum alloy melting in the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0028] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] The embodiment of the present invention discloses a method for controlling the temperature of aluminum alloy smelting. Figure 1 , comprising steps S1 to S5:

[0030] The existing aluminum alloy melting temperature control technology only relies on temperature difference to predict and adjust the melting temperature, without fully considering the temperature uniformity problem at different positions in the melting furnace. The existing limitations thus affect the quality of the aluminum alloy finally produced.

[0031] The uniformity of temperature distribution at various positions in the smelting area of ​​the smelting furnace is not only affected by the positions of the burner, heat exchanger, combustion-supporting fan and other components at the beginning of the design, but also by the combined influence of the air inlet speed and air inlet direction of the combustion-supporting fan. This is mainly because: the combustion process of the fuel in the smelting furnace affects the distribution of the released heat, and uneven fuel combustion will lead to uneven temperature distribution. Among them, the combustion-supporting fan affects the combustion intensity of the fuel and the uniform delivery of heat through the ventilation effect.

[0032] In order to solve this problem, the present invention proposes a new method, namely, by calculating the temperature uniformity of the influence area of ​​each combustion-supporting fan, and adjusting the air inlet speed and air inlet direction of each combustion-supporting fan according to the temperature uniformity, by adjusting the air inlet speed and air inlet direction of each combustion-supporting fan, the smelting area of ​​the smelting furnace can achieve a more uniform temperature distribution, and through precise temperature control, the uneven composition and structure of the aluminum alloy during the smelting process can be effectively avoided, thereby improving product quality and saving energy.

[0033] S1. Acquire temperature images of the melting area in the melting furnace.

[0034] It should be noted that in order to control the smelting temperature of the smelting furnace, the temperature of each position in the smelting area of ​​the smelting furnace needs to be accurately collected, and the environment of metal smelting is complex. Therefore, the present invention adopts a contactless temperature collection method.

[0035] Specifically, at each sampling moment, a color CCD camera is used to take a bird's-eye view of the smelting area in the smelting furnace from directly above the smelting furnace to obtain a temperature image of the smelting area in the smelting furnace. The temperature image is an RGB image. Therefore, the pixel points in the temperature image have a red channel value R, a green channel value G, and a blue channel value B.

[0036] The color CCD camera outputs an RGB signal with temperature information through photoelectric conversion to obtain a temperature image of the smelting area in the smelting furnace. Therefore, the color characteristics of each pixel in the temperature image of the smelting area in the smelting furnace can reflect the temperature of each position in the smelting area.

[0037] Among them, the collection frequency can be set according to the actual application scenario and requirements. In order to ensure the quality and performance of the final product, the operator needs to frequently monitor and adjust the smelting temperature of the smelting furnace. This frequent temperature collection and adjustment can be achieved by increasing the collection frequency. Therefore, the present invention sets the collection frequency to 2 minutes / time, that is, the interval between every two sampling moments is 2 minutes.

[0038] S2. According to the position and parameters of each combustion-supporting fan arranged in the smelting area, the temperature image is divided into the influence area of ​​each combustion-supporting fan.

[0039] It should be noted that, for multiple combustion-supporting fans arranged in the smelting area, due to their different positions and parameters, the degree of influence on different positions of the smelting area is different. Therefore, the present invention divides the temperature image according to the position and parameters of each combustion-supporting fan to obtain the influence area of ​​each combustion-supporting fan.

[0040] Specifically, the temperature image is divided into influence areas of each combustion-supporting fan according to the position and parameters of each combustion-supporting fan arranged in the smelting area, wherein the parameters of the combustion-supporting fan include an air inlet direction and an air inlet speed.

[0041] In one embodiment, the temperature image is divided into influence areas of each combustion-supporting fan according to the position and parameters of each combustion-supporting fan arranged in the smelting area, including:

[0042] According to the position and parameters of each combustion-supporting fan set in the smelting area, the influence of each combustion-supporting fan on each pixel point is calculated; for any pixel point in the temperature image, the combustion-supporting fan corresponding to the maximum influence degree is taken as the combustion-supporting fan to which the pixel point belongs, and the pixel point is taken as the target pixel point of the combustion-supporting fan to which the pixel point belongs; for any combustion-supporting fan, the area composed of all the target pixels of the combustion-supporting fan is taken as the influence area of ​​the combustion-supporting fan.

[0043] The influence degree of each combustion-supporting fan on each pixel satisfies the expression:

[0044] ;

[0045] In the formula, Indicates that the coordinates of the i-th combustion-supporting fan are The influence degree of the pixel point, x represents the horizontal coordinate of the pixel point, y represents the vertical coordinate of the pixel point, The coordinates are The angle between the pixel point and the position of the i-th combustion-supporting fan and the air inlet direction of the i-th combustion-supporting fan, Indicates that the i-th combustion-supporting fan and the coordinates are The distance of the pixel point, represents the air inlet speed of the ith combustion-supporting fan, represents the sine function, Represents an exponential function with a natural constant as its base.

[0046] It should be noted that the greater the air inlet speed of the combustion-supporting fan, the larger the range it can affect and the greater the degree of influence on the pixel points; along the air inlet direction of the combustion-supporting fan, as the distance increases, the degree of influence on the pixel points decreases; and for the pixels at the same distance, the degree of influence on the pixel points located in the air inlet direction of the combustion-supporting fan is greater than the degree of influence on the pixel points deviating from the air inlet direction of the combustion-supporting fan; therefore, the coordinates are The angle between the pixel point and the position of the i-th combustion-supporting fan and the air inlet direction of the i-th combustion-supporting fan The smaller it is, the coordinates of the i-th combustion-supporting fan are The degree of influence of pixels The larger the value, the greater the value of the i-th combustion-supporting fan and the coordinates are The distance between pixels The smaller it is, the coordinates of the i-th combustion-supporting fan are The degree of influence of pixels The larger the air inlet speed of the i-th combustion-supporting fan is, the The larger the value is, the coordinates of the i-th combustion-supporting fan are The degree of influence of pixels The bigger.

[0047] In another embodiment, the temperature image is divided into influence areas of each combustion-supporting fan according to the position and parameters of each combustion-supporting fan arranged in the smelting area, including:

[0048] The line segment between the position of the i-th combustion-supporting fan and the position of the j-th combustion-supporting fan is denoted as the line segment ; Calculate the first distance according to the parameters of the i-th combustion-supporting fan and the j-th combustion-supporting fan; The position at which the distance from the position of the i-th combustion-supporting fan is equal to the first distance is taken as the segmentation position; the segmentation position is perpendicular to the line segment The straight line is used as the dividing line between the position of the i-th combustion-supporting fan and the position of the j-th combustion-supporting fan; the temperature image is divided according to the dividing line between the positions of every two combustion-supporting fans to obtain the influence area of ​​each combustion-supporting fan. For details, please refer to the segmentation process of the Thiessen polygon algorithm.

[0049] Wherein, the first distance satisfies the expression:

[0050] ;

[0051] In the formula, represents the first distance, , Respectively represent the air inlet direction of the i-th and j-th combustion-supporting fans, Represents a line segment The angle with the vertical direction, represents the cosine function, , denote the air inlet speeds of the i-th and j-th combustion-supporting fans, respectively. Represents the distance between the position of the i-th combustion-supporting fan and the position of the j-th combustion-supporting fan.

[0052] It should be noted that Indicates that the i-th combustion-supporting fan is along the line segment Direction of wind speed, Indicates that the jth combustion-supporting fan is along the line segment The greater the air inlet speed of the combustion-supporting fan, the greater the range it can affect. Therefore, the i-th combustion-supporting fan is along the line segment Direction of wind speed and The larger the ratio of , the farther the distance between the segmentation position and the position of the i-th combustion-supporting fan, that is, the first distance, is.

[0053] It should be noted that dividing the temperature image into the influence areas of each combustion-supporting fan can more effectively control and optimize the temperature distribution during the smelting process.

[0054] S3. Perform superpixel segmentation on the affected area according to different size parameters, calculate the segmentation effects of different size parameters, and obtain the target size according to the segmentation effects.

[0055] It should be noted that superpixel segmentation is a technology for regional segmentation of images, which mainly utilizes the distance characteristics and color characteristics of pixel points in the image. Therefore, the result of superpixel segmentation of the temperature image can reflect the distribution of pixel points in the temperature image, and then reflect the distribution of temperature in the smelting area.

[0056] Specifically, for any affected area, superpixel segmentation is performed on the affected area according to different size parameters, and the mean of the grayscale distribution concentration of all pixels in all superpixels corresponding to different size parameters is used as the segmentation effect of different size parameters; the size parameter with the largest segmentation effect is used as the target size.

[0057] The value ranges of different size parameters are , where K1 represents a first preset value, K2 represents a second preset value, and ; The first preset value and the second preset value can be set according to the actual application scenario and requirements, and the first preset value is required to be smaller than the second preset value. The present invention sets the first preset value to 5 and the second preset value to 20.

[0058] In one embodiment, the grayscale distribution concentration of all pixels refers to the normalized result of the information entropy of the grayscale values ​​of all pixels, and the normalized result of the information entropy of the grayscale values ​​of all pixels is inversely proportional to the information entropy of the grayscale values ​​of all pixels. For example, the normalized function The information entropy of the grayscale values ​​of all pixels is normalized, where exp() represents an exponential function with a natural constant as the base, x represents input, and y represents output.

[0059] In another embodiment, the grayscale distribution concentration of all pixels refers to the normalized result of the variance of the grayscale values ​​of all pixels, and the normalized result of the square of the grayscale values ​​of all pixels is inversely proportional to the variance of the grayscale values ​​of all pixels. For example, the normalized function Normalize the variance of the grayscale values ​​of all pixels, where exp() represents an exponential function with a natural constant as the base, x represents input, and y represents output.

[0060] It should be noted that a good superpixel division should maintain the consistency within the superpixel area, that is, the pixels within the same superpixel should be similar in color features; for the pixels within the superpixel, both the information entropy of the grayscale values ​​of all pixels and the variance of the grayscale values ​​of all pixels can reflect the difference in the grayscale values ​​of all pixels. The greater the difference, the smaller the concentration of the grayscale distribution of all pixels, and the worse the segmentation effect of the size parameter.

[0061] S4. Calculate the temperature uniformity of the affected area based on the target size and the segmentation effect of the target size.

[0062] Specifically, the temperature uniformity of the affected area is calculated according to the target size and the segmentation effect of the target size; the temperature uniformity is positively correlated with the target size and the segmentation effect of the target size.

[0063] The temperature uniformity of the affected area satisfies the expression:

[0064] ;

[0065] In the formula, represents the temperature uniformity of the ith affected area, represents the target size of the i-th impact area, represents the segmentation effect of the target size of the i-th impact area, and K2 represents the second preset value.

[0066] It should be noted that the target size of the impact area can reflect the distribution of the color characteristics of the pixels in the impact area. Therefore, the target size of the i-th impact area is The larger the value, the larger the local range of pixels with similar color features in the affected area. The temperature uniformity of the i-th affected area is The bigger, For target size Normalize; segmentation effect of the target size of the i-th impact area The larger the value, the better the temperature uniformity of the i-th affected area. The bigger.

[0067] S5. According to the temperature uniformity, a corrected air inlet speed and a corrected air inlet direction of each combustion-supporting fan are obtained to facilitate controlling the smelting temperature of the smelting furnace.

[0068] Specifically, in response to the temperature uniformity of the affected area being greater than or equal to a preset threshold, the air inlet speed and air inlet direction of the combustion-supporting fan corresponding to the affected area are not corrected; in response to the temperature uniformity of the affected area being less than the preset threshold, the air inlet speed of the combustion-supporting fan corresponding to the affected area is corrected according to the temperature uniformity to obtain the corrected air inlet speed of the combustion-supporting fan, and according to the grayscale distribution concentration of all pixels in each superpixel corresponding to the target size of the affected area, the angle between the line connecting the center point of each superpixel and the position of the combustion-supporting fan corresponding to the affected area and the vertical direction is weighted to obtain the corrected air inlet direction of the combustion-supporting fan corresponding to the affected area, so as to control the melting temperature of the melting furnace.

[0069] It should be noted that the present invention realizes the control of the smelting temperature of the smelting furnace by correcting the air inlet speed and air inlet direction of all combustion-supporting fans.

[0070] The preset threshold value may be set according to actual application scenarios and requirements. The present invention sets the preset threshold value to 0.6.

[0071] Among them, the corrected air inlet speed of the combustion-supporting fan satisfies the expression:

[0072] ;

[0073] In the formula, represents the corrected air inlet speed of the ith combustion-supporting fan, represents the temperature uniformity of the ith affected area, Indicates the preset threshold value, Represents the air inlet speed of the i-th combustion-supporting fan.

[0074] It should be noted that in the smelting area of ​​the smelting furnace, the temperature distribution in the smelting area is uneven due to the uneven combustion of the fuel. When it is less than the preset threshold, it means that the smelting temperature distribution in the smelting area is uneven. At this time, the air inlet speed of the combustion-supporting fan can be increased to make the fuel burn evenly, thereby making the smelting temperature distribution in the smelting area uniform; therefore, the temperature uniformity of the i-th influencing area The smaller the value, the corrected air inlet speed of the i-th combustion-supporting fan The bigger.

[0075] It should be further explained that when the melting temperature distribution in the melting area is uneven, the fuel combustion can be evenly distributed by increasing the air inlet speed of the combustion-supporting fan, thereby making the melting temperature distribution in the melting area uniform. This can effectively avoid the uneven composition and structure of the aluminum alloy during the melting process, thereby improving product quality and saving energy.

[0076] Among them, the corrected air inlet direction of the combustion-supporting fan satisfies the expression:

[0077] ;

[0078] In the formula, represents the corrected air inlet direction of the i-th combustion-supporting fan, represents the total number of all superpixels corresponding to the target size of the i-th impact area, represents the grayscale distribution concentration of all pixels in the t-th superpixel corresponding to the target size of the ith impact area, represents the angle between the vertical direction and the line connecting the center point of the t-th superpixel corresponding to the target size of the ith impact area and the position of the ith combustion-supporting fan, Represents the sum of the grayscale distribution concentrations of all pixels in all superpixels corresponding to the target size of the i-th impact area.

[0079] It should be noted that in the smelting area of ​​the smelting furnace, the temperature distribution in the smelting area is uneven due to the uneven combustion of the fuel. When it is less than the preset threshold, it means that the smelting temperature distribution in the smelting area is uneven. At this time, it is necessary to increase the air intake in the area with uneven temperature distribution to make the fuel in this area burn evenly, and then make the smelting temperature distribution in the smelting area uniform; therefore, the smaller the grayscale distribution concentration of all pixels in the tth superpixel corresponding to the target size of the i-th impact area, the more uneven the temperature distribution in the area corresponding to the superpixel, and the more the air intake direction of the combustion-supporting fan should be directed towards this area.

[0080] It should be further explained that when the melting temperature distribution in the melting area is uneven, the air inlet direction of the combustion-supporting fan is directed toward the super-pixel area with the more uneven temperature distribution, and the air inlet volume in the area with uneven temperature distribution is increased, so that the fuel in the area burns evenly, and the melting temperature distribution in the melting area is uniform, which can effectively avoid the uneven composition and structure of the aluminum alloy during the melting process, thereby improving product quality and saving energy.

[0081] An embodiment of the present invention further discloses an aluminum alloy smelting temperature control system, comprising a processor and a memory, wherein the memory stores computer program instructions, and when the computer program instructions are executed by the processor, an aluminum alloy smelting temperature control method according to the present invention is implemented.

[0082] The above system also includes other components well known to those skilled in the art, such as a communication bus and a communication interface, and their configuration and functions are known in the art, so they will not be described in detail here.

[0083] In the description of this specification, "plurality" or "several" means at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0084] Although this specification has shown and described a number of embodiments of the present invention, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art will conceive of many modifications, changes and alternatives without departing from the ideas and spirit of the present invention. It should be understood that in practicing the present invention, various alternatives to the embodiments of the present invention described herein may be employed.

Claims

1. A method for controlling the melting temperature of an aluminum alloy, characterized in that: include: Acquire temperature images of the melting area in the melting furnace; The temperature image is divided into the influence area of ​​each combustion-supporting fan according to the position and parameters of each combustion-supporting fan arranged in the smelting area. The parameters of the combustion-supporting fan include the air inlet direction and the air inlet speed. Perform superpixel segmentation on the affected area according to different size parameters, and take the mean of the grayscale distribution concentration of all pixels in all superpixels corresponding to different size parameters as the segmentation effect of different size parameters; take the size parameter with the largest segmentation effect as the target size; Calculating the temperature uniformity of the affected area according to the target size and the segmentation effect of the target size, wherein the temperature uniformity is positively correlated with the target size and the segmentation effect of the target size; When the temperature uniformity is less than a preset threshold, the air inlet speed of the combustion-supporting fan is corrected according to the temperature uniformity to obtain the corrected air inlet speed of each combustion-supporting fan. According to the grayscale distribution concentration of all pixels in each superpixel corresponding to the target size of the affected area, the angle between the line connecting the center point of each superpixel and the position of the combustion-supporting fan and the vertical direction is weighted to obtain the corrected air inlet direction of the combustion-supporting fan, so as to control the melting temperature of the melting furnace.

2. The aluminum alloy smelting temperature control method according to claim 1, characterized in that: According to the position and parameters of each combustion-supporting fan arranged in the smelting area, the temperature image is divided into the influence area of ​​each combustion-supporting fan, including: According to the position and parameters of each combustion-supporting fan arranged in the smelting area, the influence degree of each combustion-supporting fan on each pixel point is calculated; For any pixel point in the temperature image, the combustion-supporting fan corresponding to the maximum value of the influence degree is taken as the combustion-supporting fan to which the pixel point belongs, and the pixel point is taken as the target pixel point of the combustion-supporting fan to which the pixel point belongs; For any combustion-supporting fan, the area formed by all target pixel points of the combustion-supporting fan is taken as the influence area of ​​the combustion-supporting fan.

3. The aluminum alloy smelting temperature control method according to claim 2, characterized in that: The influence degree of each combustion-supporting fan on each pixel satisfies the expression: ； In the formula, Indicates that the coordinates of the i-th combustion-supporting fan are The influence degree of the pixel point, x represents the horizontal coordinate of the pixel point, y represents the vertical coordinate of the pixel point, The coordinates are The angle between the pixel point and the position of the i-th combustion-supporting fan and the air inlet direction of the i-th combustion-supporting fan, Indicates that the i-th combustion-supporting fan and the coordinates are The distance of the pixel point, represents the air inlet speed of the ith combustion-supporting fan, represents the sine function, Represents an exponential function with a natural constant as its base.

4. The aluminum alloy smelting temperature control method according to claim 1, characterized in that: According to the position and parameters of each combustion-supporting fan arranged in the smelting area, the temperature image is divided into the influence area of ​​each combustion-supporting fan, including: The line segment between the position of the i-th combustion-supporting fan and the position of the j-th combustion-supporting fan is denoted as the line segment ; Calculate the first distance according to the parameters of the i-th combustion-supporting fan and the j-th combustion-supporting fan; Line segment The position at which the distance from the position of the i-th combustion-supporting fan is equal to the first distance is taken as the segmentation position; the segmentation position is perpendicular to the line segment The straight line is used as the dividing line between the position of the i-th combustion-supporting fan and the position of the j-th combustion-supporting fan; The temperature image is divided according to the dividing line between the positions of every two combustion-supporting fans to obtain the influence area of ​​each combustion-supporting fan.

5. The aluminum alloy smelting temperature control method according to claim 4, characterized in that: The first distance satisfies the expression: ； In the formula, represents the first distance, , Respectively represent the air inlet direction of the i-th and j-th combustion-supporting fans, Represents a line segment The angle with the vertical direction, represents the cosine function, , denote the air inlet speeds of the i-th and j-th combustion-supporting fans, respectively. Represents the distance between the position of the i-th combustion-supporting fan and the position of the j-th combustion-supporting fan.

6. The aluminum alloy smelting temperature control method according to claim 1, characterized in that: The grayscale distribution concentration of all pixels refers to the normalized result of the information entropy of the grayscale values ​​of all pixels, and the normalized result of the information entropy of the grayscale values ​​of all pixels is inversely proportional to the information entropy of the grayscale values ​​of all pixels.

7. The aluminum alloy smelting temperature control method according to claim 1, characterized in that: The temperature uniformity of the affected area satisfies the expression: ； In the formula, represents the temperature uniformity of the ith affected area, represents the target size of the i-th impact area, represents the segmentation effect of the target size of the i-th impact area, and K2 represents the second preset value.

8. The aluminum alloy smelting temperature control method according to claim 1, characterized in that: The corrected air inlet speed of the combustion-supporting fan satisfies the expression: ； In the formula, represents the corrected air inlet speed of the ith combustion-supporting fan, represents the temperature uniformity of the ith affected area, Indicates the preset threshold value, Represents the air inlet speed of the i-th combustion-supporting fan.

9. The aluminum alloy smelting temperature control method according to claim 1, characterized in that: The corrected air inlet direction of the combustion-supporting fan satisfies the expression: ； In the formula, represents the corrected air inlet direction of the i-th combustion-supporting fan, represents the total number of all superpixels corresponding to the target size of the i-th impact area, represents the grayscale distribution concentration of all pixels in the t-th superpixel corresponding to the target size of the ith impact area, represents the angle between the vertical direction and the line connecting the center point of the t-th superpixel corresponding to the target size of the ith impact area and the position of the ith combustion-supporting fan, Represents the sum of the grayscale distribution concentrations of all pixels in all superpixels corresponding to the target size of the i-th impact area.

10. An aluminum alloy smelting temperature control system, characterized in that: include: A processor and a memory, wherein the memory stores computer program instructions, and when the computer program instructions are executed by the processor, an aluminum alloy smelting temperature control method according to any one of claims 1 to 9 is implemented.

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