Glass tempering bending forming equipment and temperature control system thereof

Abstract

The present application relates to the technical field of glass forming, in particular to a glass tempering and bending forming equipment and a temperature control system thereof, which can flexibly control the temperature of local areas by heating different glass heating areas with different heating elements, thereby ensuring the temperature uniformity control ability of glass heating; based on the similar neighborhood temperature of each glass heating area, the abnormal heating areas are analyzed and screened from the bottom and top of the glass respectively; further considering the possible misjudgment of abnormal heating areas when a large range of temperature anomalies occurs, the calculation of heating control temperature is carried out on the abnormal heating areas and the genus area in the topological structure of the abnormal connected area which may be regarded as a normal heating area according to the temperature deviation between adjacent glass heating areas, so that the accuracy of the heating control temperature of each glass heating area is higher, and the effect of temperature control on the glass heating process according to the heating control temperature is better.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of glass forming, in particular to a glass tempering and bending forming equipment and a temperature control system thereof. BACKGROUND

[0002] The core process of glass tempering and bending forming is to heat the glass to the softening temperature range, press and bend through the mold, and quickly cool and set. Since the softening and bending processes of glass are extremely sensitive to temperature. Therefore, high-precision regulation and control of temperature during this process is the core link to ensure the quality and production efficiency of glass products.

[0003] In the prior art, when controlling the temperature, the prior art usually uses a unified heat source to heat the entire glass. However, the glass is not flat when it is heated and bent. Due to the lack of local control of the heating temperature of the glass, the actual heating process of the glass is not uniform in temperature. Inconsistent temperature causes thermal stress in adjacent areas of the glass due to expansion. Non-uniform stress leads to insufficient tempering strength or abnormal stress distribution, which reduces the impact resistance of the finished product and causes through cracks. That is, the method of directly heating the entire glass in the prior art has poor temperature control effect, and cannot guarantee the production quality of the glass. SUMMARY

[0004] In order to solve the technical problem of poor temperature control effect of the method of directly heating the entire glass in the prior art, the purpose of the present application is to provide a glass tempering and bending forming equipment and a temperature control system thereof, and the technical scheme adopted is as follows:

[0005] The first aspect of the present application provides a glass tempering and bending forming equipment temperature control system, comprising:

[0006] A data acquisition and preprocessing module is configured to acquire the bottom temperature value and the top temperature value of each local area in each glass heating area corresponding to each heating element during the heating process of the same piece of glass.

[0007] An abnormal heating area screening module is configured to determine the temperature uniformity of each glass heating area according to the distribution uniformity of the bottom temperature value and the top temperature value of each local area, determine the adjustment necessity of each glass heating area according to the similarity of the bottom temperature value and the top temperature value on the whole and the boundary between adjacent glass heating areas, and the similarity of the temperature uniformity, and screen out abnormal heating areas according to the adjustment necessity.

[0008] The temperature control module is used to combine all adjacent abnormal heating areas to determine an abnormal communication area; according to the topological structure genus condition of the abnormal communication area and the temperature deviation condition between adjacent glass heating areas, the heating control temperature of each glass heating area is determined; and the glass heating process is controlled according to the heating control temperature.

[0009] Further, the temperature uniformity acquisition process comprises:

[0010] According to the standard deviation of the bottom temperature value of all local areas in each glass heating area, the corresponding bottom temperature dispersion is determined; according to the standard deviation of the top temperature value of all local areas in each glass heating area, the corresponding top temperature dispersion is determined; according to the difference between the bottom temperature value and the top temperature value of each local area, the corresponding temperature reference difference value is determined; and according to the standard deviation of the temperature reference difference value of all local areas in each glass heating area, the temperature difference value dispersion is determined.

[0011] The sum value between the bottom temperature dispersion, the top temperature dispersion and the temperature difference value dispersion is negatively correlated to map, and the temperature uniformity of each glass heating area is determined.

[0012] Further, the adjustment necessity acquisition process comprises:

[0013] According to the mean value of the bottom temperature value of all local areas located at the boundary in each glass heating area, the corresponding bottom boundary temperature is determined; according to the mean value of the top temperature value of all local areas located at the boundary in each glass heating area, the corresponding top boundary temperature is determined; and after the bottom boundary temperature, the top boundary temperature and the temperature uniformity are arranged horizontally in turn, the temperature feature vector of each glass heating area is obtained; and other glass heating areas within the preset neighborhood range of each glass heating area are taken as corresponding adjacent heating areas.

[0014] According to the similarity between the temperature feature vector of each glass heating area and the temperature feature vector of each adjacent heating area, the temperature adjustment characteristic value of each glass heating area is determined; and according to the deviation condition of the bottom boundary temperature and the top boundary temperature between each glass heating area and the adjacent heating area, the overall adjustment weight of each glass heating area is determined.

[0015] The product between the overall adjustment weight and the temperature adjustment characteristic value is normalized to determine the adjustment necessity of each glass heating area.

[0016] Further, the temperature adjustment characteristic value acquisition process comprises:

[0017] constructing a reference temperature matrix and an adjacent temperature matrix for each glass heating region; all row vectors of the reference temperature matrix are a temperature feature vector of each glass heating region and temperature feature vectors of all adjacent heating regions; all row vectors of the adjacent temperature matrix are temperature feature vectors of all adjacent heating regions of each glass heating region;

[0018] calculating a covariance matrix of the reference temperature matrix to obtain a reference covariance matrix; calculating a covariance matrix of the adjacent temperature matrix to obtain an adjacent covariance matrix; determining a temperature adjustment feature value of each glass heating region according to a product between a negative correlation mapping value of a matrix trace of the reference covariance matrix and a matrix trace of the adjacent covariance matrix.

[0019] Further, the obtaining process of the overall adjustment weight comprises:

[0020] In each glass heating region, determining a bottom temperature range of each glass heating region according to a difference between a maximum value of bottom temperature values of all local regions and a minimum value of bottom temperature values of all local regions; determining a reference bottom mean value according to a mean value of bottom boundary temperatures of all adjacent heating regions of each glass heating region; determining a corresponding bottom temperature boundary difference according to a difference between a bottom boundary temperature of each glass heating region and the reference bottom mean value; determining a bottom adjustment weight according to a ratio between the bottom temperature boundary difference and the bottom temperature range; determining a top adjustment weight of each glass heating region according to an obtaining principle of the bottom adjustment weight; determining an overall adjustment weight according to a sum value between the bottom adjustment weight and the top adjustment weight.

[0021] Further, the obtaining process of the abnormal heating region comprises:

[0022] determining the abnormal heating region by performing abnormal detection on adjustment necessity of all glass heating regions through a Z-score abnormal detection algorithm.

[0023] Further, the obtaining process of the heating control temperature comprises:

[0024] obtaining an initial control temperature value of a corresponding heating element of each glass heating region; sequentially taking each abnormal heating region as a target region; taking other glass heating regions within a preset neighborhood range of the target region as comparative heating regions;

[0025] The difference between the bottom boundary temperature of the contrast heating area and the bottom boundary temperature of the target area is taken as a bottom boundary temperature difference; the difference between the top boundary temperature of the contrast heating area and the top boundary temperature of the target area is taken as a top boundary temperature difference; a contrast adjustment influence value of the contrast heating area is determined according to the average value between the bottom boundary temperature difference and the top boundary temperature difference; a temperature adjustment influence value of each contrast heating area is determined according to the sum value between the initial regulation temperature value of each contrast heating area and the corresponding contrast adjustment influence value; a corresponding local adjustment influence value is determined according to the product between the negative correlation mapping value of the regulation necessity of each contrast heating area and the temperature adjustment influence value; and a heating regulation temperature of the target area is determined according to the cumulative value of the local adjustment influence values of all contrast heating areas.

[0026] The glass heating area corresponding to the genus of the abnormal connected region is taken as a genus region; and other glass heating areas outside the abnormal heating region and the genus region are taken as normal heating regions;

[0027] All normal heating regions adjacent to the abnormal connected region corresponding to the genus region are taken as reference heating regions; a temperature correction value of the genus region is determined according to the distance and temperature deviation direction between the genus region and the reference heating regions and the overall bottom temperature of the reference heating regions; and a heating regulation temperature of the genus region is determined according to the sum value between the initial regulation temperature value of the genus region and the temperature correction value.

[0028] A corresponding heating adjustment temperature is determined according to the initial regulation temperature value of each normal heating region.

[0029] Further, the temperature correction value acquisition process comprises:

[0030] A reference adjustment influence value of each reference heating region is determined according to the acquisition principle of the contrast adjustment influence value of the contrast heating area; and the reference adjustment influence value is input into a sign function to output a regulation direction value of each reference heating region.

[0031] The distance between each reference heating area and the genus area is taken as a reference influence distance; a heating influence distance is determined according to the mean value of the reference influence distances of all reference heating areas; a corresponding distance weight is determined according to the ratio between the reference influence distance of each reference heating area and the heating influence distance; a temperature influence amplitude of each reference heating area is determined according to the product between the distance weight and the regulation direction value; an overall influence amplitude of the genus area is determined according to the mean value of the temperature influence amplitudes of all reference heating areas; a temperature normal deviation value of the genus area is determined according to the difference between the mean value of the bottom boundary temperatures of all normal heating areas and the bottom boundary temperature of the genus area; and a temperature correction value of the genus area is determined according to the product between the temperature normal deviation value and the temperature influence amplitude.

[0032] Further, the process of temperature control on the glass heating process according to the heating regulation temperature comprises:

[0033] The temperature of the heating element of each abnormal heating area is adjusted to the corresponding heating regulation temperature.

[0034] The application also proposes a glass tempering and bending forming equipment, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of any one of the glass tempering and bending forming equipment temperature control systems when executing the computer program.

[0035] The application has the following beneficial effects:

[0036] The application first heats different glass heating areas by different heating elements, thereby flexibly controlling the temperature of local areas and ensuring the temperature uniformity control ability of glass heating; then analyzes the neighborhood temperature similarity of each glass heating area from the glass bottom and top respectively, thereby screening out abnormal heating areas; further, considering that the abnormal heating area may be misjudged when a large range of temperature abnormalities occurs, the temperature correction value of the abnormal heating area and the genus area in the topological structure of the abnormal connected area which may be regarded as a normal heating area is further calculated according to the temperature deviation between adjacent glass heating areas, so that the accuracy of the heating regulation temperature of each glass heating area is higher, and the effect of temperature control on the glass heating process according to the heating regulation temperature is better. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, and the advantages thereof, below will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

[0038] Figure 1 A glass tempering and bending forming equipment temperature control system structure diagram provided by an embodiment of the present application;

[0039] Figure 2 A glass tempering and bending forming equipment structure diagram provided by an embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined purpose, the specific embodiments, structures, features and effects of the glass tempering and bending forming equipment and its temperature control system according to the present application will be described in detail below with reference to the drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment, and the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form. In addition, the terms "first", "second" are used for description purposes only, and cannot be understood as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features with "first", "second" can be explicitly or implicitly included one or more features.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0042] The specific scheme of the glass tempering and bending forming equipment and its temperature control system provided by the present application will be described in detail below with reference to the drawings.

[0043] The present application provides a glass tempering and bending forming equipment temperature control system, please refer to Figure 1 , which shows a glass tempering and bending forming equipment temperature control system structure diagram provided by an embodiment of the present application, comprising: data acquisition preprocessing module 101, abnormal heating area screening module 102 and temperature control module 103.

[0044] The data acquisition preprocessing module 101 is used to acquire the bottom temperature value and the top temperature value of each local area in the glass heating area corresponding to each heating element during the heating process of the same piece of glass.

[0045] Place the glass on the processing table and start the heating furnace to heat the glass. The heating furnace heats the glass by evenly placing heating elements (resistance heating), and each heating element can be individually temperature-controlled. Ensure that the temperature is controllable and uniform during heating. Use an infrared thermal imager to monitor the temperature of the bottom of the processed glass to obtain a bottom infrared image; use an infrared thermal imager to monitor the temperature of the bottom of the processed glass to obtain a top infrared image; in one specific implementation of the embodiment of the application, the bottom infrared image is evenly divided into at least two glass heating regions, all of which are rectangular in shape and size; then each heating element is corresponded to the centroid of each corresponding glass heating region, so that each heating element corresponds to a glass heating region. In one specific implementation of the embodiment of the application, each glass heating region is divided into 25 local regions in a 5x5 division manner, all of which are rectangular in shape and size. The implementer can adjust the division method of the glass heating region and the division method of the local region in each glass heating region according to the specific implementation environment, which will not be described further here.

[0046] Further, a preset number of sampling points are uniformly arranged in each local region of the bottom infrared image, the temperature of all sampling points in each local region is determined based on the bottom infrared image, and the bottom temperature value of each local region is determined according to the mean value of the temperature values of all sampling points in each local region. The top temperature value of each local region is determined according to the mean value of the temperature values of all sampling points in each local region in the top infrared image. It should be noted that the bottom infrared image and the top infrared image are in a front and back relationship, so their corresponding local regions are mutually used, and the bottom temperature value and the top temperature value of each local region are calculated based on this; the preset number of sampling points is set to 25, which can be adjusted according to the specific implementation environment.

[0047] The abnormal heating region screening module 102 is configured to determine the temperature uniformity of each glass heating region according to the distribution uniformity of the bottom temperature value and the top temperature value of each local region; determine the adjustment necessity of each glass heating region according to the similarity of the bottom temperature value and the top temperature value between adjacent glass heating regions in the whole and on the boundary, and the similarity of the temperature uniformity; and screen out abnormal heating regions according to the adjustment necessity.

[0048] Because the furnace first heats the bottom of the glass during the heating process, the temperature inside the glass is raised by heat transfer, and then the temperature spreads to the top surface of the glass. During the heating process, thermal stress is generated inside the glass, and if the temperature distribution of the bottom and the top is uneven, the thermal expansion of the glass at each part will be inconsistent, thereby generating uneven stress. Therefore, when the upper and lower surfaces of the glass are uniformly heated, it means that the glass is uniformly heated inside at this time, and uniform heating ensures that the glass can uniformly deform during the subsequent bending process of the glass, thereby forming the required curvature and shape. Therefore, the uniform heating of the upper and lower surfaces of each glass heating area is further analyzed, and the temperature uniformity of each glass heating area is determined according to the distribution uniformity of the bottom temperature value and the top temperature value of each local area, and the temperature uniformity is used to measure the uniformity characteristics of the corresponding heating element for heating the glass heating area.

[0049] Preferably, in a specific implementation manner of the embodiment of the present application, the temperature uniformity acquisition process includes: determining the corresponding bottom temperature dispersion according to the standard deviation of the bottom temperature value of all local areas in each glass heating area; determining the corresponding top temperature dispersion according to the standard deviation of the top temperature value of all local areas in each glass heating area; determining the corresponding temperature reference difference value according to the difference value between the bottom temperature value and the top temperature value of each local area; and determining the temperature difference dispersion according to the standard deviation of the temperature reference difference value of all local areas in each glass heating area.

[0050] The standard deviation represents the dispersion characteristics of a group of data, so the greater the bottom temperature dispersion, the worse the uniformity of the bottom temperature of the glass heating area, and the smaller the temperature uniformity should be. Correspondingly, the greater the top temperature dispersion, the worse the uniformity of the top temperature of the glass heating area, and the smaller the temperature uniformity should be. In addition, if the distribution of the temperature reference difference value of each local area is more uneven, it means that the temperature transfer from the bottom to the top of each local temperature is uneven, which makes the correlation between the top temperature and the bottom temperature worse in uniformity. The greater the temperature difference dispersion, the smaller the overall temperature uniformity. Therefore, according to the correlation, the sum of the bottom temperature dispersion, the top temperature dispersion and the temperature difference dispersion is negatively related, and the temperature uniformity of each glass heating area is determined.

[0051] Preferably, in some possible implementation manners of the embodiment of the present application, the temperature uniformity acquisition process is represented by a formula as follows: A k = 1 - Norm(σ' k × σ" k × Δσ k ); wherein A k is the temperature uniformity of the kth glass heating area, σ'k is the standard deviation of the bottom temperature values of all local regions in the kth glass heating region, that is, the corresponding bottom temperature dispersion; σ k is the standard deviation of the top temperature values of all local regions in the kth glass heating region, that is, the corresponding top temperature dispersion; Δσ k is the standard deviation of the temperature reference difference values of all local regions in the kth glass heating region, that is, the corresponding temperature difference dispersion; Norm() is a linear normalization function, and the normalization method can be adjusted according to the specific implementation environment, and will not be described further herein.

[0052] In order to make the thermal stress uniform in the glass heating process, it is necessary to reduce the temperature difference between each glass heating region of the bottom glass or each glass heating region of the top glass as much as possible; and the temperature uniformity reflects the up-down temperature difference of the region and the characteristics of the temperature distribution, so the characteristic deviation between each glass heating region and the adjacent glass heating region can be characterized by the determined adjustment necessity according to the similar situation of the bottom temperature value and the top temperature value on the whole and the boundary and the similar situation of the temperature uniformity, so that the greater the adjustment necessity, the more necessary it is to adjust the temperature of the heating element.

[0053] Preferably, in some possible implementation manners of the embodiment of the present application, the adjustment necessity acquisition process comprises:

[0054] determining the corresponding bottom boundary temperature according to the mean value of the bottom temperature values of all local regions located at the boundary in each glass heating region; determining the corresponding top boundary temperature according to the mean value of the top temperature values of all local regions located at the boundary in each glass heating region; and arranging the bottom boundary temperature, the top boundary temperature and the temperature uniformity in turn in the transverse direction to obtain the temperature feature vector of each glass heating region; and taking other glass heating regions within a preset neighborhood range of each glass heating region as the corresponding adjacent heating regions. For adjacent glass heating regions, if there is a high similarity in temperature between the local regions located at the boundary, it indicates that the two adjacent glass heating regions have a high consistency in temperature on the boundary, and the adjacent temperature is relatively uniform, so the temperature feature vector is constructed in combination with the top boundary temperature, the bottom boundary temperature and the temperature uniformity representing the temperature uniformity, so as to more accurately measure the consistency of the temperature features between the adjacent glass heating regions. In one specific implementation manner of the embodiment of the present application, the preset neighborhood range is set to an eight-neighborhood range, which can be adjusted according to the specific implementation environment.

[0055] After obtaining the temperature characteristics of the element, the temperature-related characteristics of the glass heating region adjacent thereto should be consistent. If the consistency between the adjacent glass heating regions is destroyed, such as a large temperature difference between the adjacent heating positions of the glass bottom, the temperature of the position needs to be adjusted. The greater the difference, the greater the need to adjust the heating control temperature of the heating element. However, since the heating element has a concentrated heating position during the heating of the glass, heat spreads to other positions of the same bottom, resulting in a temperature difference, which is a normal phenomenon. In this case, it is verified whether the difference between the heating region and the adjacent heating region is small, and whether the temperature control of all adjacent heating regions shows strong consistency, so as to determine whether to adjust the temperature of the heating element.

[0056] According to the similarity between the temperature characteristic vector of each glass heating region and the temperature characteristic vector of each adjacent heating region, a temperature adjustment characteristic value of each glass heating region is determined; wherein the process of obtaining the temperature adjustment characteristic value includes: constructing a reference temperature matrix and an adjacent temperature matrix of each glass heating region; all row vectors of the reference temperature matrix are the temperature characteristic vectors of each glass heating region and all adjacent heating regions; all row vectors of the adjacent temperature matrix are the temperature characteristic vectors of all adjacent heating regions of each glass heating region; a covariance matrix of the reference temperature matrix is calculated to obtain a reference covariance matrix; a covariance matrix of the adjacent temperature matrix is calculated to obtain an adjacent covariance matrix; according to the product between the negative correlation mapping value of the matrix trace of the reference covariance matrix and the matrix trace of the adjacent covariance matrix, the temperature adjustment characteristic value of each glass heating region is determined, so that the greater the temperature adjustment characteristic value, the more inconsistent the temperature characteristics of the corresponding glass heating region and the adjacent heating region, and the greater the adjustment necessity.

[0057] Based on the properties of the covariance matrix, the smaller the matrix trace of the reference covariance matrix, the higher the consistency of the temperature characteristics between the corresponding glass heating region and each adjacent heating region; similarly, since the adjacent temperature matrix is composed of the temperature characteristic vectors of all adjacent heating regions of each glass heating region, the smaller the matrix trace of the corresponding reference covariance matrix, the higher the consistency of the temperature characteristics between each adjacent heating region; therefore, for any glass heating region, if the matrix trace of the corresponding reference covariance matrix is small and the matrix trace of the adjacent covariance matrix is large, it means that the corresponding glass heating region does not meet the temperature characteristics in its neighborhood, and the temperature characteristics of the glass heating region are more abnormal, and the necessity of adjusting the heating temperature of the corresponding heating element is greater. It should be noted that the calculation of the covariance matrix and the trace of the matrix is a technical means known to those skilled in the art, which will not be further limited and elaborated here.

[0058] In a specific implementation of the embodiment of the present application, the process of obtaining the temperature adjustment characteristic value is expressed by a formula as follows: k = exp(-tr′ k ) x tr″ k ; wherein S k is the temperature adjustment characteristic value of the kth glass heating area; tr′ k is the trace of the adjacent covariance matrix of the kth glass heating area; tr″ k is the trace of the reference covariance matrix of the kth glass heating area; and exp() is an exponential function with a natural constant as the base.

[0059] However, if the adjacent heating area of the glass heating area itself has a large temperature difference, that is, the adjacent heating area itself has an anomaly, the matrix trace of the reference covariance matrix and the matrix trace of the adjacent covariance matrix will both increase, which reduces the reference value of the obtained temperature adjustment characteristic value. Therefore, the deviation of the boundary temperature difference between the adjacent glass heating areas compared to the temperature difference of the glass heating area itself is analyzed, and the overall adjustment weight of each glass heating area is determined according to the deviation of the bottom boundary temperature and the top boundary temperature between each glass heating area and the adjacent heating area.

[0060] Preferably, in some possible implementation manners of the embodiment of the present application, the process of obtaining the overall adjustment weight comprises:

[0061] In each glass heating area, the bottom temperature range of each glass heating area is determined according to the difference between the maximum value of the bottom temperature values of all local areas and the minimum value of the bottom temperature values of all local areas; the reference bottom mean value is determined according to the mean value of the bottom boundary temperatures of all adjacent heating areas of each glass heating area; and the corresponding bottom temperature boundary difference is determined according to the difference between the bottom boundary temperature of each glass heating area and the reference bottom mean value.

[0062] For each glass heating area, if the deviation between the size feature of the bottom boundary temperature of all adjacent heating areas and the bottom boundary temperature of itself exceeds the corresponding bottom temperature range, it indicates that the overall boundary temperature deviation of the adjacent heating area exceeds the normal fluctuation range of the corresponding glass heating area, and the reliability of the temperature feature in the process of calculating the temperature adjustment feature value of each adjacent heating area is lower, and the reliability of the corresponding temperature adjustment feature value should be lower, and therefore the bottom adjustment weight is further determined according to the ratio between the bottom temperature boundary difference and the bottom temperature range, so that the smaller the bottom adjustment weight is, the lower the reliability of the corresponding temperature adjustment feature value is. It should be noted that, in order to ensure that the calculation result is meaningful, when performing fractional operation, the denominator needs to be added by a parameter adjustment factor greater than 0 to prevent the denominator from being 0, and the value of the parameter adjustment factor is set by the implementer according to the actual situation, and the parameter adjustment factor is set to 0.1 in the present application.

[0063] Further, according to the acquisition principle of the bottom adjustment weight, the top adjustment weight of each glass heating area is determined; specifically: in each glass heating area, the top temperature range of each glass heating area is determined according to the difference between the maximum value of the top temperature value of all local areas and the minimum value of the top temperature value of all local areas; the reference top mean value is determined according to the mean value of the top boundary temperature of all adjacent heating areas of each glass heating area; the corresponding top temperature boundary difference is determined according to the difference between the top boundary temperature of each glass heating area and the reference top mean value; the top adjustment weight is determined according to the ratio between the top temperature boundary difference and the top temperature range; the acquisition principle of the top adjustment weight is the same as that of the bottom adjustment weight, which will not be described further. Finally, the overall adjustment weight is determined according to the sum value between the bottom adjustment weight and the top adjustment weight by combining the bottom adjustment weight and the top adjustment weight, so that the higher the overall adjustment weight is, the higher the reliability of the corresponding temperature adjustment feature value is, and therefore the temperature adjustment feature value is further weighted by the overall adjustment weight. The product between the overall adjustment weight and the temperature adjustment feature value is normalized to determine the adjustment necessity of each glass heating area.

[0064] In one specific implementation manner of the embodiment of the present application, the acquisition process of the adjustment necessity is represented by a formula as follows: B k = Norm(S k × (E ′ k + E ′ k ′ )); wherein B k is the adjustment necessity of the kth glass heating area; S k is the temperature adjustment feature value of the kth glass heating area; E′ k E is the bottom adjustment weight of the kth glass heating area ′ k ′ E is the top adjustment weight of the kth glass heating area ′ k +E ′ k ′ E is the overall adjustment weight of the kth glass heating area.

[0065] Further, the abnormal heating area is screened based on the adjustment necessity. The above describes the analysis of the adjustment necessity of the glass heating area of each heating element, but due to the actual heating of the glass heating and bending forming, there may be a case of uneven heat supply or different thickness, which may result in that although the glass heating area of a part of the position corresponds to a smaller adjustment necessity, it does not mean that the heating temperature of the heating element of the glass heating area does not need to be adjusted, and the whole glass needs to be maintained consistent in the temperature control process of heating to avoid uneven thermal stress.

[0066] Preferably, in some possible implementation manners of the embodiments of the present application, the acquisition process of the abnormal heating area comprises: performing abnormal detection on the adjustment necessities of all the glass heating areas by a Z-score abnormal detection algorithm to determine and screen out the abnormal heating area. The Z-score abnormal detection algorithm is used to globally detect all the glass heating areas to more accurately screen out the abnormal heating area. It should be noted that the Z-score abnormal detection algorithm is a technical means known to those skilled in the art, which will not be further limited and described herein.

[0067] The temperature control module 103 is configured to combine all the adjacent abnormal heating areas to determine an abnormal connected area, determine a heating control temperature of each glass heating area according to the topological structure genus of the abnormal connected area and the temperature deviation between adjacent glass heating areas, and control the glass heating process according to the heating control temperature.

[0068] After all the abnormal heating areas are determined, the mutually connected abnormal heating areas are further merged to determine the merged abnormal connected areas. Since in the global inspection process, the detected abnormal heating areas are areas where the temperature is excessive, after the abnormal heating areas are merged to obtain the abnormal connected areas, the abnormal connected areas can have a genus. Although the genus is not an abnormal heating area, the appearance of the genus usually indicates that the corresponding abnormal connected domain represents a large range of temperature abnormalities, and only the region with excessive temperature change is represented. The genus inside it also needs to be adjusted in temperature. Therefore, in order to determine a more accurate heating control temperature, the heating control temperature of each glass heating area is further determined according to the genus of the topological structure of the abnormal connected area and the temperature deviation between adjacent glass heating areas.

[0069] Preferably, in some possible implementation manners of the embodiments of the present application, the heating control temperature acquisition process comprises:

[0070] The initial control temperature value of the heating element corresponding to each glass heating area is obtained; each abnormal heating area is sequentially taken as a target area; other glass heating areas within a preset neighborhood range of the target area are taken as comparative heating areas. The comparative heating area is a glass heating area adjacent to the target area, and the temperature of the comparative heating area can be used to correct the temperature of the target area. It should be noted that the initial control temperature value of the heating element is the temperature value set by the heating element corresponding to each glass heating area before this temperature control.

[0071] The difference between the bottom boundary temperature of the comparative heating area and the bottom boundary temperature of the target area is taken as the bottom boundary temperature difference; the difference between the top boundary temperature of the comparative heating area and the top boundary temperature of the target area is taken as the top boundary temperature difference; the average value between the bottom boundary temperature difference and the top boundary temperature difference is used to determine the comparative adjustment influence value of the comparative heating area; the sum of the initial control temperature value of each comparative heating area and the corresponding comparative adjustment influence value is taken as the temperature adjustment influence value of each comparative heating area.

[0072] Since the temperature of the comparative heating area is used to correct the temperature of the target area, the average value of the bottom boundary temperature difference and the top boundary temperature difference is used to determine the basis quantity for temperature correction of the target area, that is, the comparative adjustment influence value. Based on the comparative adjustment influence value and the initial control temperature value, the temperature adjustment influence value of each comparative heating area is determined, that is, the temperature adjustment influence value to which the target area should be adjusted under the reference of the corresponding comparative heating area.

[0073] Further, it is necessary to consider that the contrast heating area of the target area has different adjustment necessities, when the adjustment necessity is larger, it means that the necessity of temperature adjustment of the corresponding contrast heating area is larger, and then the reference value of the corresponding temperature adjustment influence value will be reduced, on the contrary, when the adjustment necessity is smaller, it means that the temperature adjustment necessity of the corresponding contrast heating area is smaller, and then the reference value of the corresponding temperature adjustment influence value will be improved, therefore, further according to the product of the negative correlation mapping value of the adjustment necessity of each contrast heating area and the temperature adjustment influence value, the corresponding local adjustment influence value is determined, and according to the cumulative value of the local adjustment influence values of all contrast heating areas, the heating control temperature of the target area is determined.

[0074] In a specific implementation manner of the embodiment of the present application, the acquisition process of the heating control temperature of the target area w is expressed by a formula as follows: Wherein, H w is the heating control temperature of the target area w; N w is the number of contrast heating areas of the target area w; B w,i is the adjustment necessity of the i th contrast heating area corresponding to the target area w; softmax() is a softmax function, which is used for normalizing all 1-B w,i of the target area w; C w,i is the contrast adjustment influence value of the i th contrast heating area corresponding to the target area w; is the initial control temperature value of the target area w; is the temperature adjustment influence value of the i th contrast heating area corresponding to the target area w. is the local adjustment influence value of the i th contrast heating area corresponding to the target area w; and then according to the acquisition process of the heating control temperature of the target area w, the heating adjustment temperature of each abnormal heating area is determined.

[0075] Further, the glass heating area corresponding to the genus of the abnormal connected region is taken as a genus region; the abnormal heating region and other glass heating regions outside the genus region are taken as normal heating regions; for the genus region, i.e., the region that is not abnormal in the above abnormal heating region determination process but still needs to be adjusted, there is usually a large range of abnormalities in the neighborhood of the genus region, so the temperature characteristics of the surrounding glass heating regions cannot be relied on for temperature regulation; in order to more accurately regulate the temperature, the distance between the genus region and the normal heating region is further taken as a weight and combined with the temperature characteristics of the normal heating region for temperature regulation. All normal heating regions adjacent to the abnormal connected region corresponding to the genus region are taken as reference heating regions; according to the distance between the genus region and the reference heating region, the temperature deviation direction, and the overall bottom temperature of the reference heating region, a temperature correction value of the genus region is determined.

[0076] Preferably, in a specific implementation of an embodiment of the present application, the temperature correction value acquisition process includes:

[0077] According to the acquisition principle of the comparative adjustment influence value of the comparative heating region, a reference adjustment influence value of each reference heating region is determined; the reference adjustment influence value is input into a sign function to output a regulation direction value of each reference heating region; the distance between each reference heating region and the genus region is taken as a reference influence distance; according to the average of the reference influence distances of all reference heating regions, a heating influence distance is determined; according to the ratio between the reference influence distance of each reference heating region and the heating influence distance, a corresponding distance weight is determined; according to the product between the distance weight and the regulation direction value, a temperature influence amplitude of each reference heating region is determined.

[0078] First, for the genus region, if the overall normal heating region of the abnormal connected region boundary is closer, it means that the genus region is closer to the outside, so the glass temperature adjustment at this position can be realized through the temperature adjustment of the adjacent position, and therefore the heating temperature adjustment at this position should be smaller; further, according to this feature, the distance weight of each reference heating region located at the abnormal connected region boundary is calculated; further, when simply adjusting the temperature based on the neighborhood, the direction of the temperature needs to be determined, so the sign function is used to determine the regulation direction of the temperature influence of each reference heating region on the genus region; thereby, the distance weight and the regulation direction value are further combined to determine the temperature influence amplitude of each reference heating region, and then the average of the temperature influence amplitudes of all reference heating regions is determined to determine the overall influence amplitude of the genus region, so that the overall influence amplitude can represent the direction of the temperature adjustment of the genus region and the closeness of the overall normal heating region of the abnormal connected region boundary, so that the represented temperature regulation weight is more accurate.

[0079] Further, based on the temperature difference between the bottom boundary of the normal heating area and the defect area, the basic value of the temperature regulation, i.e., the temperature normal deviation value, is determined; then, the overall influence amplitude representing the temperature regulation weight is combined for weighting to determine the more accurate temperature correction value corresponding to the defect area; since the heating element directly affects the bottom temperature, the temperature normal deviation value of the defect area is determined according to the difference between the mean value of the bottom boundary temperature of all normal heating areas and the bottom boundary temperature of the defect area, and the basic value of the temperature adjustment is determined through the overall deviation of the bottom temperature of the defect area compared with the normal area; the temperature correction value of the defect area is determined according to the product between the temperature normal deviation value and the temperature influence amplitude.

[0080] In a specific implementation manner of the embodiment of the present application, the process of obtaining the temperature correction value is expressed by a formula as follows: Wherein, F v is the temperature correction value of the vth defect area; is the mean value of the temperature influence amplitude of all reference heating areas corresponding to the vth defect area, i.e., the overall influence amplitude; is the mean value of the bottom boundary temperature of all normal heating areas; T v is the bottom boundary temperature of the vth defect area; || is the absolute value symbol; is the temperature normal deviation value of the vth defect area.

[0081] After the temperature correction value is determined, the heating regulation temperature of the defect area is determined according to the sum value between the initial regulation temperature value of the defect area and the temperature correction value; the heating adjustment temperature corresponding to each normal heating area is determined according to the initial regulation temperature value of each normal heating area; the temperature characteristics of the normal heating area are normal, so the temperature regulation of the heating element corresponding thereto is not needed. Thus, the heating regulation temperature of each glass heating area is determined, and finally the temperature of each abnormal heating area is adjusted to the corresponding heating regulation temperature. It should be noted that the calculation and adjustment of the heating regulation temperature of the embodiment of the present application is performed every 30 seconds, and the interval time can be adjusted according to the specific implementation environment, which is not limited and described further herein.

[0082] To sum up, the glass tempering and bending forming equipment temperature control system first heats different glass heating areas through different heating elements, so as to flexibly control the temperature of the local area, and ensure the glass heating temperature uniformity control ability; then based on the neighborhood temperature similarity of each glass heating area, the bottom and top of the glass are analyzed respectively, so as to screen out the abnormal heating area; further considering that when a larger range of temperature abnormalities occurs, the abnormal heating area may be misjudged, therefore further according to the temperature deviation between adjacent glass heating areas, the heating control temperature of the abnormal heating area and the genus area in the topological structure of the abnormal connected area which may be regarded as a normal heating area is calculated, so that the accuracy of the heating control temperature of each glass heating area is higher, and the effect of temperature control on the glass heating process according to the heating control temperature is better.

[0083] The embodiment of the present application also provides a glass tempering and bending forming equipment, please refer to Figure 2 which shows a glass tempering and bending forming equipment structure schematic diagram provided by an embodiment of the present application, the glass tempering and bending forming equipment comprises a memory 201, a processor 202 and a computer program 203 stored in the memory 201 and running on the processor 202, wherein when the processor 202 executes the computer program 203, the glass tempering and bending forming equipment can execute any one of the glass tempering and bending forming equipment temperature control systems introduced above.

[0084] The embodiment of the present application also provides a computer program product, when the computer program product runs on the computer equipment, so that the computer equipment can execute any one of the glass tempering and bending forming equipment temperature control systems introduced above.

[0085] The embodiment of the present application also provides a computer readable storage medium, and the computer readable storage medium stores computer program code, when the computer program code runs on the computer equipment, so that the computer equipment can execute any one of the glass tempering and bending forming equipment temperature control systems introduced above.

[0086] In the embodiments provided in the present application, it should be understood that the computer equipment, computer program product and computer readable storage medium provided are all used to execute the corresponding method provided above, and thus the beneficial effects that can be achieved are referred to the beneficial effects of the method provided above, which will not be described here.

[0087] It should be noted that: the sequence of the above embodiments of the present application is only for description, and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multi-task processing and parallel processing are also possible or may be advantageous.

[0088] The various embodiments described in this specification are presented by way of example, and each embodiment is not inherently more important than any other embodiment. To the extent that any embodiment is directed to a distinct, independently applicable inventive concept, it is to be understood that the inventive concept(s) can be realized in a multitude of alternative ways. Each embodiment is presented for the purpose of illustrating one or more aspects of the inventive concept(s), and the application should not be construed as requiring that the inventive concept(s) be limited to only those embodiments.

Claims

1. A glass tempering and bending forming apparatus temperature control system, characterized by, The system comprises: a data acquisition preprocessing module, configured to acquire a bottom temperature value and a top temperature value of each local region in a glass heating region corresponding to each heating element during heating of the same piece of glass; an abnormal heating region screening module, configured to determine a temperature uniformity of each glass heating region according to a distribution uniformity of the bottom temperature value and the top temperature value of each local region, determine an adjustment necessity of each glass heating region according to a similarity of the bottom temperature value and the top temperature value on the whole and the boundary and a similarity of the temperature uniformity between adjacent glass heating regions, and screen out an abnormal heating region according to the adjustment necessity; a temperature control module, configured to determine an abnormal connected region by merging all adjacent abnormal heating regions, determine a heating control temperature of each glass heating region according to a topological structure genus of the abnormal connected region and a temperature deviation between adjacent glass heating regions, and control a temperature of a glass heating process according to the heating control temperature.

2. A glass tempering bending forming apparatus temperature control system according to claim 1, characterized in that, The temperature uniformity acquisition process comprises: determining a bottom temperature dispersion of each glass heating region according to a standard deviation of the bottom temperature value of all local regions in the glass heating region, determining a top temperature dispersion of each glass heating region according to a standard deviation of the top temperature value of all local regions in the glass heating region, determining a temperature reference difference value of each local region according to a difference between the bottom temperature value and the top temperature value of the local region, and determining a temperature difference value dispersion of each glass heating region according to a standard deviation of the temperature reference difference value of all local regions in the glass heating region; performing negative correlation mapping on a sum value between the bottom temperature dispersion, the top temperature dispersion and the temperature difference value dispersion to determine the temperature uniformity of each glass heating region.

3. The glass tempering bending forming apparatus temperature control system according to claim 1, characterized in that, The adjustment necessity acquisition process comprises: determining a bottom boundary temperature of each glass heating region according to a mean value of the bottom temperature value of all local regions located at the boundary in the glass heating region, determining a top boundary temperature of each glass heating region according to a mean value of the top temperature value of all local regions located at the boundary in the glass heating region, sequentially horizontally arranging the bottom boundary temperature, the top boundary temperature and the temperature uniformity to obtain a temperature feature vector of each glass heating region, and taking other glass heating regions within a preset neighborhood range of each glass heating region as corresponding adjacent heating regions; determining a temperature adjustment feature value of each glass heating region according to a similarity between the temperature feature vector of each glass heating region and the temperature feature vector of each adjacent heating region, and determining an overall adjustment weight of each glass heating region according to a deviation of the bottom boundary temperature and the top boundary temperature between each glass heating region and the adjacent heating region; performing normalization on a product between the overall adjustment weight and the temperature adjustment feature value to determine the adjustment necessity of each glass heating region.

4. The glass tempering bending forming apparatus temperature control system according to claim 3, characterized in that, The temperature adjustment feature value acquisition process comprises: constructing a reference temperature matrix and an adjacency temperature matrix of each glass heating region; all row vectors of the reference temperature matrix are a temperature eigenvector of each glass heating region and temperature eigenvectors of all adjacent heating regions; all row vectors of the adjacency temperature matrix are temperature eigenvectors of all adjacent heating regions of each glass heating region; calculating a covariance matrix of the reference temperature matrix to obtain a reference covariance matrix; calculating a covariance matrix of the adjacency temperature matrix to obtain an adjacency covariance matrix; determining a temperature adjustment eigenvalue of each glass heating region according to a product between a negative correlation mapping value of a matrix trace of the reference covariance matrix and a matrix trace of the adjacency covariance matrix.

5. The glass tempering bending forming apparatus temperature control system according to claim 3, characterized in that, The acquisition process of the overall adjustment weight comprises: In each glass heating region, determining a bottom temperature range of each glass heating region according to a difference between a maximum value of bottom temperature values of all local regions and a minimum value of bottom temperature values of all local regions; determining a reference bottom mean value according to a mean value of bottom boundary temperatures of all adjacent heating regions of each glass heating region; determining a corresponding bottom temperature boundary difference according to a difference between a bottom boundary temperature of each glass heating region and the reference bottom mean value; determining a bottom adjustment weight according to a ratio between the bottom temperature boundary difference and the bottom temperature range; determining a top adjustment weight of each glass heating region according to an acquisition principle of the bottom adjustment weight; determining an overall adjustment weight according to a sum value between the bottom adjustment weight and the top adjustment weight.

6. A glass tempering and bending forming apparatus temperature control system according to claim 1, wherein, The acquisition process of the abnormal heating region comprises: determining the abnormal heating region by performing abnormal detection on adjustment necessity of all glass heating regions through a Z-score abnormal detection algorithm.

7. The glass tempering bending forming apparatus temperature control system according to claim 3, characterized in that, The acquisition process of the heating control temperature comprises: obtaining an initial control temperature value of a corresponding heating element of each glass heating region; sequentially taking each abnormal heating region as a target region; taking other glass heating regions within a preset neighborhood range of the target region as comparative heating regions; taking a difference between a bottom boundary temperature of the comparative heating region and a bottom boundary temperature of the target region as a bottom boundary temperature difference; taking a difference between a top boundary temperature of the comparative heating region and a top boundary temperature of the target region as a top boundary temperature difference; determining a comparative adjustment influence value of the comparative heating region according to a mean value between the bottom boundary temperature difference and the top boundary temperature difference; taking a sum value between the initial control temperature value of each comparative heating region and a corresponding comparative adjustment influence value as a temperature adjustment influence value of each comparative heating region; determining a local adjustment influence value corresponding to each comparative heating region according to a product between a negative correlation mapping value of adjustment necessity of each comparative heating region and the temperature adjustment influence value; determining a heating control temperature of the target region according to an accumulated value of the local adjustment influence values of all comparative heating regions; taking a glass heating region corresponding to a genus of the abnormal connected region as a genus region; taking other glass heating regions outside the abnormal heating region and the genus region as normal heating regions; The normal heating area adjacent to the abnormal connected area corresponding to the genus region is taken as a reference heating area; a temperature correction value of the genus region is determined according to the distance between the genus region and the reference heating area, the temperature deviation direction and the overall bottom temperature of the reference heating area; and a heating control temperature of the genus region is determined according to the sum of the initial control temperature value of the genus region and the temperature correction value. An initial control temperature value of each normal heating area is determined.

8. A glass tempering bending forming apparatus temperature control system according to claim 7, characterized in that, The temperature correction value is obtained by the following process: A reference adjustment influence value of each reference heating area is determined according to the principle of obtaining the comparison adjustment influence value of the comparison heating area; and the reference adjustment influence value is input into a sign function to output a control direction value of each reference heating area. The distance between each reference heating area and the genus region is taken as a reference influence distance; a heating influence distance is determined according to the average of the reference influence distances of all the reference heating areas; a distance weight of each reference heating area is determined according to the ratio between the reference influence distance of each reference heating area and the heating influence distance; a temperature influence amplitude of each reference heating area is determined according to the product of the distance weight and the control direction value; an overall influence amplitude of the genus region is determined according to the average of the temperature influence amplitudes of all the reference heating areas; a temperature normal deviation value of the genus region is determined according to the difference between the average of the bottom boundary temperatures of all the normal heating areas and the bottom boundary temperature of the genus region; and a temperature correction value of the genus region is determined according to the product of the temperature normal deviation value and the temperature influence amplitude.

9. The glass tempering and bending forming apparatus temperature control system of claim 1, wherein, The process of controlling the temperature of the glass during heating according to the heating control temperature comprises: The temperature of the heating element of each abnormal heating area is adjusted to the corresponding heating control temperature.

10. A glass tempering bending forming apparatus, the apparatus comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the computer program to realize the steps of the glass tempering and bending forming equipment temperature control system according to any one of claims 1-9.

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