Temperature monitoring system for flowing molten metal

Abstract

The invention relates to the technical field of temperature measurement, in particular to a temperature monitoring system for flowing molten metal. Comprising an obtaining module configured to obtain a temperature value and a flowing speed of a temperature monitoring point in flowing molten metal collected by a temperature sensor; the first determining module is configured to determine a plurality of target temperature monitoring points closest to the target position point; the construction module is configured to construct a Lagrange basis polynomial corresponding to the target temperature monitoring point; the second determination module is configured to determine the weight corresponding to the target temperature monitoring point according to the flowing speed of the target temperature monitoring point; and the third determination module is configured to obtain the temperature value of the target position point according to the weight corresponding to the target temperature monitoring point, the temperature value and the Lagrange basis polynomial so as to monitor the temperature value of the target position point. According to the technical scheme, the real-time performance of monitoring the temperature of the target position point in the flowing metal can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of temperature measurement, and in particular to a temperature monitoring system for flowing molten metal. Background Art

[0002] Flowing molten metal refers to metal or metal alloy in liquid state in industrial production and scientific experiments. Flowing molten metal can be used to cast various metal products, such as automobile parts and parts of mechanical equipment; or, flowing molten metal can be used to fill welds during welding; metal ore can be reduced to flowing molten metal during the smelting process to achieve metal purification.

[0003] The temperature of the flowing metal in the container can be measured by using temperature sensors such as thermocouples. However, due to the different distances between different parts of the flowing metal and the heat source, or the different heat dissipation conditions of different parts of the flowing metal, there are differences in temperature between different parts of the flowing metal.

[0004] In order to measure the temperature of different parts of the flowing metal, in the relevant technology, for example, in the Chinese patent application document with publication number CN115717942A, a liquid metal temperature and liquid level measuring device is provided, including a controller, a temperature measuring device and a driving mechanism, the temperature measuring device is vertically arranged, the driving mechanism is transmission-connected to the temperature measuring device, and is used to drive the temperature measuring device to move up and down; the temperature measuring device and the driving mechanism are respectively communication-connected to the controller.

[0005] In the related art, the position of the temperature measuring device is changed to measure different parts of the liquid metal in the container, but it is difficult to achieve real-time measurement of the temperature of different parts of the liquid metal, and the real-time monitoring of the temperature of different parts of the liquid metal is low. Summary of the invention

[0006] In order to overcome the problem of low real-time performance in monitoring the temperature of different parts of liquid metal in the related art, the present application provides a temperature monitoring system for flowing molten metal, including: an acquisition module, configured to acquire the temperature value of a temperature monitoring point in the flowing molten metal collected by a temperature sensor, and acquire the flow speed of the flowing molten metal at the temperature monitoring point, wherein the temperature monitoring point is a position point in the flowing molten metal contacted by the temperature sensor; a first determination module, configured to determine a plurality of target temperature monitoring points closest to the target position point from a plurality of temperature monitoring points; the target position point is a position point in the flowing molten metal that is not contacted by the temperature sensor; any position point of contact; a construction module, configured to take the position coordinates of the target temperature monitoring point as an independent variable, and the temperature value of the target temperature monitoring point as a dependent variable, to construct a Lagrangian basis polynomial corresponding to the target temperature monitoring point; a second determination module, configured to determine the weight corresponding to the target temperature monitoring point according to the flow velocity of the target temperature monitoring point; a third determination module, configured to perform weighted summation on the Lagrangian basis polynomials of multiple target temperature monitoring points according to the weight and temperature value corresponding to the target temperature monitoring point, to obtain the temperature value of the target position point, so as to monitor the temperature value of the target position point.

[0007] In this way, multiple target temperature monitoring points closest to the target position point are determined from multiple temperature monitoring points, and Lagrange basis polynomials corresponding to the target temperature monitoring points are constructed. In combination with the flow velocity of the target temperature monitoring points, Lagrange interpolation polynomials are obtained. The temperature value of the target position point can be obtained according to the Lagrange interpolation polynomials corresponding to the multiple target temperature monitoring points. Compared with changing the position measured by the temperature sensor, obtaining the temperature value of the target position point improves the real-time performance of temperature acquisition. Therefore, the real-time performance of monitoring the temperature of the target position point in the flowing metal can be improved.

[0008] Optionally, the second determination module is further configured to perform the following steps: determine the average flow velocity of the flowing metal liquid at multiple temperature monitoring points based on the flow velocity of the flowing metal liquid at multiple temperature monitoring points; use the ratio between the flow velocity of the target temperature monitoring point and the average flow velocity as the local flow coefficient of the target temperature monitoring point; obtain the correlation coefficient between the temperature value of the target temperature monitoring point and the other nearest temperature monitoring points, and use the ratio of the correlation coefficient to the local flow coefficient as the weight corresponding to the target temperature monitoring point.

[0009] In this way, the ratio of the correlation coefficient to the local flow coefficient is used as the weight corresponding to the target temperature monitoring point, so that the obtained weight can comprehensively consider the correlation coefficient between different temperature monitoring points and the influence of the fluidity of the flowing metal liquid on the temperature value, so as to obtain a more accurate temperature value of the target position point.

[0010] Optionally, the second determination module is also configured to perform the following steps: taking a data set of historical temperature values ​​of the target temperature monitoring point within a historical time period as a first data set, and taking a data set of historical temperature values ​​of other temperature monitoring points closest to the target temperature monitoring point within the historical time period as a second data set; taking the Pearson correlation coefficient between the first data set and the second data set as the correlation coefficient between the target temperature monitoring point and the other nearest temperature monitoring points in temperature values.

[0011] In this way, the Pearson correlation coefficient can better characterize the correlation between the temperature values ​​of two different temperature monitoring points in the historical time period, so as to more accurately determine the temperature value of the target location point at the current moment.

[0012] Optionally, the temperature value of the target location point is obtained by: , is the temperature value corresponding to the position coordinate d of the target position point, N is the number of target temperature monitoring points, is the temperature value of the i-th target temperature monitoring point, norm is the normalization processing function, is the weight corresponding to the i-th target temperature monitoring point, is the value of the Lagrange basis polynomial corresponding to the i-th target temperature monitoring point at the position coordinate d.

[0013] In this way, the flow velocity of the flowing metal liquid at the temperature monitoring point is determined based on the flow velocity of the flowing metal liquid at multiple flow velocity monitoring points adjacent to the temperature monitoring point. Even if the temperature monitoring point and the flow velocity monitoring point are located at different positions in the flowing metal liquid, the flow velocity of the flowing metal liquid at the temperature monitoring point can be better determined.

[0014] Optionally, the acquisition module is also configured to perform the following steps: acquiring the flow velocity of the flowing metal liquid at multiple flow velocity monitoring points through a flow velocity sensor; the flow velocity monitoring point is a position point where the flow velocity sensor directly measures the flow velocity, and the flow velocity includes the flow direction and the flow rate; determining the flow velocity of the flowing metal liquid at the temperature monitoring point based on the flow velocity of the flowing metal liquid at multiple flow velocity monitoring points adjacent to the temperature monitoring point.

[0015] The flow velocity sensor can be an ultrasonic flowmeter. Since the flow size or flow rate at different positions inside the flowing metal liquid may be different, the flow velocity at the flow velocity monitoring point can be measured by contacting the detection point of the flow velocity sensor with the flow velocity monitoring point inside the flowing metal liquid.

[0016] The flow velocity monitoring points can be located at different horizontal or vertical positions inside the flowing metal liquid, so as to realize multi-level measurement of the flow velocity inside the flowing metal liquid; or, since the flow of the flowing metal liquid mainly comes from the inflow or outflow of the flowing metal liquid, the flow velocity monitoring points can be set at key positions such as the outlet or inlet of the flowing metal liquid, and corresponding flow velocity monitoring points can be adaptively set at other positions in the flowing metal liquid except for the key positions. The embodiments of the present application will not be repeated here.

[0017] In this way, the flow velocity of the flowing metal liquid at the temperature monitoring point is determined based on the flow velocity of the flowing metal liquid at multiple flow velocity monitoring points adjacent to the temperature monitoring point. Even if the temperature monitoring point and the flow velocity monitoring point are located at different positions in the flowing metal liquid, the flow velocity of the flowing metal liquid at the temperature monitoring point can be better determined.

[0018] Optionally, the Lagrange basis polynomial corresponding to the target temperature monitoring point is obtained by: , is the value of the Lagrange basis polynomial corresponding to the i-th target temperature monitoring point at the position coordinate d, N is the number of target temperature monitoring points, is the position coordinate of the jth target temperature monitoring point, Is the multiplication operator.

[0019] Optionally, the system also includes a prompt module, which is configured to perform the following steps: determining a target temperature range corresponding to the position coordinates of the target location point from multiple temperature ranges; and when the temperature value of the target location point is outside the target temperature range, outputting a prompt message, wherein the prompt message is used to prompt that the temperature value of the target location point is outside the target temperature range.

[0020] Optionally, the system also includes a display module, and the third determination module is further configured to perform the following steps: generating a temperature distribution map of the flowing molten metal based on the temperature values ​​of multiple target position points in the flowing molten metal and the temperature values ​​of multiple temperature monitoring points; the temperature distribution map includes the temperature values ​​of different position points inside the container of the flowing molten metal; and sending the temperature distribution map to the display module so that the display module displays the temperature distribution map.

[0021] In this way, by displaying the temperature distribution diagram on the display module, the user can more intuitively observe the possible temperature anomalies in the flowing molten metal. Compared with the user's own analysis of the temperature distribution in the flowing molten metal, the difficulty of the user to monitor the temperature of the flowing molten metal can be reduced.

[0022] The technical solution provided by the embodiments of the present application may include the following beneficial effects: determining multiple target temperature monitoring points closest to the target position point from multiple temperature monitoring points, and constructing Lagrangian basis polynomials corresponding to the target temperature monitoring points, so as to obtain Lagrangian interpolation polynomials in combination with the flow velocity of the target temperature monitoring points, and the temperature value of the target position point can be obtained according to the Lagrangian interpolation polynomials corresponding to the multiple target temperature monitoring points. Compared with changing the position measured by the temperature sensor, the temperature value of the target position point is obtained, which improves the real-time performance of temperature acquisition, and therefore can improve the real-time performance of monitoring the temperature of the target position point in the flowing metal.

[0023] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0025] Figure 1 is a schematic structural diagram of a temperature monitoring system for flowing molten metal according to an exemplary embodiment; Figure 2 is a schematic structural diagram of another temperature monitoring system for flowing molten metal according to an exemplary embodiment; Figure 3 It is a schematic structural diagram of another temperature monitoring system for flowing molten metal according to an exemplary embodiment. DETAILED DESCRIPTION

[0026] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application.

[0027] First, the application scenario of the embodiment of the present application is briefly introduced. In the application scenario of the present application, in a container of liquid flowing metal, due to the different distances between different parts of the flowing metal and the heat source, for example, the temperature of the liquid metal closer to the heat source is higher; or the heat dissipation conditions of different parts of the flowing metal are different, for example, the heat dissipation conditions at the outlet of the container of flowing metal may be better, resulting in different actual temperatures in different parts of the flowing metal liquid.

[0028] Since the actual temperatures of different parts of the flowing molten metal are different, the temperature is mainly measured by contacting the temperature measuring point of the temperature sensor with the flowing molten metal. In order to achieve measurement of different parts of the flowing molten metal, the position of the temperature sensor for temperature measurement can be changed. However, changing the position of the temperature sensor takes a certain amount of time, and at the same time, only one position point inside the flowing molten metal can be measured, making it difficult to measure the temperature of multiple positions inside the flowing molten metal at the same time.

[0029] Even if more temperature sensors are used to measure the temperature of multiple points inside the flowing molten metal at the same time, the temperature sensors can only measure the temperature of the points they touch relatively accurately. It will be difficult to obtain the temperature values ​​of the points not touched by the temperature sensors. Therefore, it is difficult to achieve real-time monitoring of the temperature of different points inside the flowing molten metal.

[0030] In view of the above technical problems, the present application provides a temperature monitoring system for flowing molten metal, which can monitor the temperature of different points inside a container of flowing molten metal. Figure 1 is a schematic structural diagram of a temperature monitoring system for flowing molten metal according to an exemplary embodiment. Figure 1 As shown, the temperature monitoring system 1000 of flowing molten metal includes: an acquisition module 1100 , a first determination module 1200 , a construction module 1300 , a second determination module 1400 and a third determination module 1500 .

[0031] The acquisition module 1100 is configured to acquire the temperature value of a temperature monitoring point in the flowing metal liquid collected by the temperature sensor, and to acquire the flow velocity of the flowing metal liquid at the temperature monitoring point, wherein the temperature monitoring point is a position point in the flowing metal liquid contacted by the temperature sensor.

[0032] The acquisition module 1100 can acquire the temperature value of the temperature monitoring point at the current moment, and acquire the flow velocity of the flowing metal liquid at the temperature monitoring point at the current moment. The flow velocity of the flowing metal liquid may include the flow direction and flow rate during the flow.

[0033] By acquiring the temperature value and the flow velocity by the acquisition module 1100, it is possible to facilitate the other modules of the temperature monitoring system 1000 of the flowing metal liquid to call the temperature value and the flow velocity, so as to determine the acquisition of the temperature value of any position point in the flowing metal liquid at the current moment. Among them, the temperature sensor can be a thermocouple sensor, an optical fiber sensor or the like.

[0034] The first determination module 1200 is configured to determine a plurality of target temperature monitoring points that are closest to a target position point from a plurality of temperature monitoring points; the target position point is any position point in the flowing molten metal that is not contacted by a temperature sensor.

[0035] The temperature monitoring points in the flowing metal liquid can be distributed at different horizontal or vertical positions in the flowing metal liquid to obtain the temperature of positions at different levels in the flowing metal liquid. The number of temperature monitoring points of the flowing metal liquid can be set according to actual needs.

[0036] For example, multiple temperature sensors may be provided at the outlet position, the inlet position and other positions inside the container of the flowing molten metal to obtain the temperature values ​​of multiple temperature monitoring points of the flowing molten metal.

[0037] The target position point is any position point in the flowing metal liquid that is not contacted by the temperature sensor. Since the target position point is not in direct contact with the temperature sensor, for example, the target position point is not within the distance range where the temperature sensor can implement temperature monitoring, the temperature value of the target position point cannot be accurately measured by the temperature sensor. In this way, multiple target temperature monitoring points closest to the target position point can be selected to obtain the temperature value of the target position point.

[0038] The number of the selected multiple target temperature monitoring points closest to the target location point can be determined according to actual needs. For example, the number of the multiple target temperature monitoring points can be between 3 and 6.

[0039] The construction module 1300 is configured to construct a Lagrange basis polynomial corresponding to the target temperature monitoring point by taking the position coordinates of the target temperature monitoring point as an independent variable and the temperature value of the target temperature monitoring point as a dependent variable.

[0040] Since the selected multiple target temperature monitoring points are the multiple temperature monitoring points closest to the target position point, there is a certain correlation between the temperature value of the target position point and the temperature values ​​of the multiple target temperature monitoring points. In order to facilitate the determination of the temperature value of the target position point, the Lagrange basis polynomial can be constructed according to the position coordinates and the temperature value.

[0041] The Lagrange basis polynomial is a component of the Lagrange interpolation polynomial in the Lagrange interpolation method, and different data points have corresponding Lagrange basis polynomials; for example, when the number of target temperature monitoring points corresponding to the target position point is 4, 4 Lagrange basis polynomials corresponding to the 4 target temperature monitoring points can be obtained, so as to determine the temperature value corresponding to the target position point according to the values ​​of the target position point in these 4 Lagrange basis polynomials.

[0042] The second determination module 1400 is configured to determine a weight corresponding to the target temperature monitoring point according to a flow velocity of the target temperature monitoring point.

[0043] The flow condition of the flowing metal liquid affects the heat conduction of the flowing metal liquid, so that the flow condition of the flowing metal liquid affects the temperature of different positions in the flowing metal liquid, or the fluidity of the liquid metal is different at different temperatures, so that the flow condition of the liquid metal can reflect the temperature of the liquid metal. Therefore, the target temperature monitoring point can be assigned a corresponding weight according to the flow velocity of the target temperature monitoring point in order to determine the temperature value of the target position point.

[0044] The third determination module 1500 is configured to perform weighted summation of the Lagrangian basis polynomials of multiple target temperature monitoring points according to the weights and temperature values ​​corresponding to the target temperature monitoring points to obtain the temperature value of the target location point to monitor the temperature value of the target location point.

[0045] By performing weighted summation on the Lagrangian basis polynomials of multiple target temperature monitoring points, the influence of the temperature values ​​of multiple target temperature monitoring points adjacent to the target location point on the temperature value of the target location point can be fully considered, thereby achieving real-time acquisition of the temperature value of the target location point.

[0046] Through the temperature monitoring system 1000 of flowing molten metal provided in the embodiment of the present application, multiple target temperature monitoring points closest to the target position point are determined from multiple temperature monitoring points, and Lagrange basis polynomials corresponding to the target temperature monitoring points are constructed. In combination with the flow velocity of the target temperature monitoring points, Lagrange interpolation polynomials are obtained. The temperature value of the target position point can be obtained according to the Lagrange interpolation polynomials corresponding to the multiple target temperature monitoring points. Compared with changing the position measured by the temperature sensor, the real-time performance of temperature acquisition is improved. Therefore, the real-time performance of monitoring the temperature of the target position point in the flowing metal can be improved.

[0047] In one embodiment, the second determination module 1400 is further configured to perform the following steps: determine the average flow velocity of the flowing metal liquid at multiple temperature monitoring points based on the flow velocity of the flowing metal liquid at multiple temperature monitoring points; use the ratio between the flow velocity of the target temperature monitoring point and the average flow velocity as the local flow coefficient of the target temperature monitoring point; obtain the correlation coefficient between the target temperature monitoring point and the other nearest temperature monitoring points in terms of temperature value, and use the ratio of the correlation coefficient to the local flow coefficient as the weight corresponding to the target temperature monitoring point.

[0048] There is a certain correlation between the temperatures of the flowing molten metal at different positions in the container, and the degree of correlation between different adjacent positions is different. For example, the correlation between the temperature values ​​of two adjacent positions close to the heat source is usually greater than the correlation between the temperature values ​​of two adjacent positions far from the heat source.

[0049] The flowing metal liquid has a certain fluidity in the container. For example, the container of the flowing metal liquid may include an inlet for adding the flowing metal liquid to the container, and an outlet for discharging the flowing metal liquid from the container, so that the fluidity at different positions of the flowing metal liquid is different, and the fluidity between adjacent positions is correlated, so that the heat conduction efficiency achieved between adjacent positions has a certain correlation, and thus the temperature values ​​between adjacent positions in the flowing metal liquid are correlated.

[0050] The lower the fluidity in the flowing metal liquid, the more uniform the temperature distribution near the temperature monitoring point, and the ratio between the flow velocity of the target temperature monitoring point and the average flow velocity can reflect the difference between the fluidity level of the flowing metal liquid at the target temperature monitoring point and the average fluidity level. Therefore, a higher weight can be assigned to the target temperature monitoring point with a lower flow velocity, thereby increasing the contribution of the target temperature monitoring point with a more uniform temperature distribution to the calculation of the temperature value of the target position point; conversely, a lower weight can be assigned to the target temperature monitoring point with a higher flow velocity, thereby reducing the contribution of the target temperature monitoring point with a more uniform temperature distribution to the calculation of the temperature value of the target position point.

[0051] In this way, the ratio of the correlation coefficient to the local fluidity coefficient is used as the weight corresponding to the target temperature monitoring point, so that the obtained weight can comprehensively consider the correlation coefficient between different temperature monitoring points and the influence of the fluidity of the flowing metal liquid on the temperature value, so as to obtain a more accurate temperature value of the target position point.

[0052] In one embodiment, the second determination module 1400 is also configured to perform the following steps: taking the historical temperature value data set of the target temperature monitoring point within the historical time period as the first data set, and taking the historical temperature value data set of other temperature monitoring points closest to the target temperature monitoring point within the historical time period as the second data set; taking the Pearson correlation coefficient between the first data set and the second data set as the correlation coefficient between the target temperature monitoring point and the other nearest temperature monitoring points in temperature value.

[0053] For example, the historical time period may be the time period 5 minutes before the current moment, or the historical time period may be the same moment as the working state of the container of flowing molten metal at the current moment, and the working state of the container of flowing molten metal may be determined according to the inflow rate and outflow rate of the flowing molten metal in the container of flowing molten metal; the specific duration of the historical time period may also be set according to actual needs, and the embodiment of the present application does not impose any limitation on the duration of the historical time period.

[0054] In this way, the Pearson correlation coefficient can better characterize the correlation between the temperature values ​​of two different temperature monitoring points in the historical time period, so as to more accurately determine the temperature value of the target location point at the current moment.

[0055] In one embodiment, the Lagrange basis polynomial corresponding to the target temperature monitoring point is obtained by: , is the value of the Lagrange basis polynomial corresponding to the i-th target temperature monitoring point at the position coordinate d, N is the number of target temperature monitoring points, is the position coordinate of the jth target temperature monitoring point, Is the multiplication operator.

[0056] A three-dimensional coordinate system can be established for the container of flowing molten metal. For example, the center of the bottom surface of the container of flowing molten metal can be taken as the coordinate origin, the vertical direction can be taken as the z-axis of the three-dimensional coordinate system, and the x-axis and y-axis of the three-dimensional coordinate system can be adaptively determined to determine the position coordinates of different positions in the flowing molten metal in the three-dimensional coordinate system.

[0057] For example, when there are three target temperature monitoring points, the coordinates of the three target temperature monitoring points are (x1, y1, z1), (x2, y2, z2), and (x3, y3, z3), respectively. The Lagrange basis polynomial of the first target temperature monitoring point is , when applied to three-dimensional coordinates, , substitute the coordinates of the three target temperature monitoring points, , substituting the position coordinates of the target position point, the value of the Lagrange basis polynomial corresponding to the first target temperature monitoring point at the target position point can be obtained.

[0058] When the denominator of the Lagrangian basis polynomial is 0, the target temperature monitoring point involved in the construction of the Lagrangian polynomial can be re-determined; or, a preset value can be added to the denominator term in the Lagrangian polynomial, such as 0.01 and 0.02, which are small values ​​relative to the position coordinates, to avoid the situation where the denominator is 0 in the Lagrangian polynomial.

[0059] In this way, the Lagrangian basis polynomial corresponding to the target temperature monitoring point can be determined, so as to obtain the temperature value corresponding to the target position point according to the multiple Lagrangian basis polynomials corresponding to the multiple target temperature monitoring points corresponding to the target position point.

[0060] In one embodiment, the temperature value of the target location point is obtained by: , is the temperature value corresponding to the position coordinate d of the target position point, N is the number of target temperature monitoring points, is the temperature value of the i-th target temperature monitoring point, norm is the normalization processing function, is the weight corresponding to the i-th target temperature monitoring point, is the value of the Lagrange basis polynomial corresponding to the i-th target temperature monitoring point at the position coordinate d.

[0061] By substituting the position coordinates of the target position point into the Lagrange basis polynomial of the i-th target temperature monitoring point, the value of the Lagrange basis polynomial of the i-th target temperature monitoring point at the target position can be obtained. According to the weights and temperature values ​​of different target temperature monitoring points and the values ​​of the Lagrange basis polynomials corresponding to the target temperature monitoring points at the target position point, the temperature value of the target position point can be obtained, thereby realizing the acquisition of the temperature values ​​of other position points other than the position points monitored by the temperature sensor.

[0062] In one embodiment, the acquisition module 1100 is further configured to perform the following steps: acquiring the flow velocity of the flowing metal liquid at multiple flow velocity monitoring points through a flow velocity sensor; the flow velocity monitoring point is a position point where the flow velocity sensor directly measures the flow velocity, and the flow velocity includes the flow direction and the flow rate; determining the flow velocity of the flowing metal liquid at the temperature monitoring point based on the flow velocity of the flowing metal liquid at multiple flow velocity monitoring points adjacent to the temperature monitoring point.

[0063] The flow velocity of the flowing metal liquid at the flow velocity monitoring point can be obtained by an ultrasonic flow velocity sensor, and the flow velocity may include the flow direction and the flow rate; the flow velocity monitoring point and the temperature monitoring point can be located at different positions in the flowing metal liquid, thereby realizing more flexible monitoring of the temperature and flow velocity in the flowing metal liquid.

[0064] The flow rate monitoring point and the temperature monitoring point may also be located at the same position in the flowing molten metal. For example, the temperature sensor and the flow rate sensor may be coupled to simultaneously acquire the flow velocity and temperature values ​​at the same monitoring position.

[0065] For example, since the fluidity of the flowing metal at a position point is affected by the fluidity of other surrounding position points, and the flow velocity includes the flow direction and the flow rate, the vector summation result of the flow velocities of multiple flow velocity monitoring points adjacent to the temperature monitoring point can be used as the flow velocity of the flowing metal liquid at the temperature monitoring point.

[0066] In this way, the flow velocity of the flowing metal liquid at the temperature monitoring point is determined based on the flow velocity of the flowing metal liquid at multiple flow velocity monitoring points adjacent to the temperature monitoring point. Even if the temperature monitoring point and the flow velocity monitoring point are located at different positions in the flowing metal liquid, the flow velocity of the flowing metal liquid at the temperature monitoring point can be better determined.

[0067] In one embodiment, Figure 2 As shown, the temperature monitoring system 1000 for flowing molten metal also includes a prompt module 1600, which is configured to perform the following steps: determining a target temperature range corresponding to the position coordinates of a target position point from a plurality of temperature ranges; and when the temperature value of the target position point is outside the target temperature range, outputting a prompt message, wherein the prompt message is used to prompt that the temperature value of the target position point is outside the target temperature range.

[0068] For example, since the position of the flowing molten metal from the heat source is different, the temperature range of different positions in the container of the flowing molten metal is different. The temperature range corresponding to different positions in the flowing molten metal can be determined after actual measurement or simulation testing based on the metal type of the flowing metal and the distance from the heat source; for example, the temperature range of aluminum in a liquid state can be between 650°C and 850°C.

[0069] In this way, the temperature value of the target location point can be monitored in real time according to the target temperature range corresponding to the target location point, so that the supervisor can find possible abnormalities in the flowing metal.

[0070] In one embodiment, Figure 3 As shown, the temperature monitoring system 1000 for flowing molten metal also includes a display module 1700, and the third determination module 1500 is also configured to perform the following steps: generating a temperature distribution diagram of the flowing molten metal according to the temperature values ​​of multiple target position points in the flowing molten metal and the temperature values ​​of multiple temperature monitoring points; the temperature distribution diagram includes the temperature values ​​of different position points inside the container of the flowing molten metal; and sending the temperature distribution diagram to the display module 1700 so that the display module 1700 displays the temperature distribution diagram.

[0071] For example, a display device can be set up on the floor where the container of flowing metal is located. The display device is communicated with the third determination module 1500 to obtain the temperature values ​​of different target position points in the flowing metal liquid determined by the third determination module 1500. The display device can also be communicated with the acquisition module 1100 to obtain the temperature values ​​of different temperature monitoring points in the flowing metal liquid, so as to obtain the temperature values ​​of different positions in the flowing metal liquid in an all-round manner.

[0072] The display module 1700 can be connected to the third determination module 1500 for communication, and receive the temperature distribution map sent by the third determination module 1500. Through the temperature distribution map, the user can more intuitively observe the temperature anomalies that may exist in the flowing molten metal. For example, the temperature distribution map can display position points with different temperature values ​​in different colors, or the temperature distribution map can display position points within the temperature range and position points outside the temperature range in different display styles.

[0073] In this way, by displaying the temperature distribution diagram on the display module, the user can more intuitively observe the possible temperature anomalies in the flowing molten metal. Compared with the user's own analysis of the temperature distribution in the flowing molten metal, the difficulty of the user to monitor the temperature of the flowing molten metal can be reduced.

[0074] It should be understood that the features of some embodiments of the various applications described herein may be combined with each other, unless specifically stated otherwise.

[0075] Although terms such as "first", "second", and "third" may be used herein to describe various components, parts, regions, layers, or sections, these components, parts, regions, layers, or sections are not limited to these terms. Instead, these terms are only used to distinguish one component, part, region, layer, or section from another component, part, region, layer, or section. Therefore, without departing from the teachings of the examples described herein, the first component, part, region, layer, or section mentioned in the examples may also be referred to as the second component, part, region, layer, or section.

[0076] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description herein, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0077] In addition, the word "exemplary" is used herein to mean serving as an example, instance, or diagram. Any aspect or design described herein as "exemplary" is not necessarily to be understood as being advantageous over other aspects or designs. Instead, the use of the word exemplary is intended to present concepts in a concrete manner. As used herein, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or".

[0078] Likewise, although the present application has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding this specification and the accompanying drawings. With particular regard to the various functions performed by the components (e.g., elements, resources, etc.) described above, unless otherwise noted, the terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific functions of the described components, even if not structurally equivalent to the disclosed structures.

[0079] In addition, while particular features of the present application may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations as may be desired and advantageous for any given or particular application.

[0080] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary technical means in the art that are not disclosed in the present application, and the specification and embodiments are only considered as exemplary.

[0081] It will be appreciated that the present application is not limited to the exact construction that has been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof.

Claims

1. A temperature monitoring system for flowing molten metal, characterized in that: include: an acquisition module, configured to acquire a temperature value of a temperature monitoring point in the flowing metal liquid collected by the temperature sensor, and to acquire a flow velocity of the flowing metal liquid at the temperature monitoring point, wherein the temperature monitoring point is a position point in the flowing metal liquid contacted by the temperature sensor; A first determination module is configured to determine a plurality of target temperature monitoring points closest to a target position point from a plurality of temperature monitoring points; the target position point is any position point in the flowing metal liquid that is not contacted by the temperature sensor; A construction module is configured to take the position coordinates of the target temperature monitoring point as an independent variable and the temperature value of the target temperature monitoring point as a dependent variable to construct a Lagrange basis polynomial corresponding to the target temperature monitoring point; A second determination module is configured to determine a weight corresponding to the target temperature monitoring point according to a flow velocity of the target temperature monitoring point; The third determination module is configured to perform weighted summation of the Lagrange basis polynomials of multiple target temperature monitoring points according to the weights and temperature values ​​corresponding to the target temperature monitoring points to obtain the temperature value of the target position point so as to monitor the temperature value of the target position point.

2. The temperature monitoring system for flowing molten metal according to claim 1, characterized in that: The second determining module is further configured to perform the following steps: Determining an average flow velocity of the flowing metal liquid at the multiple temperature monitoring points according to the flow velocity of the flowing metal liquid at the multiple temperature monitoring points; The ratio between the flow velocity at the target temperature monitoring point and the average flow velocity is used as the local flow coefficient at the target temperature monitoring point; The correlation coefficient between the target temperature monitoring point and the nearest other temperature monitoring points in terms of temperature value is obtained, and the ratio of the correlation coefficient to the local flow coefficient is used as the weight corresponding to the target temperature monitoring point.

3. The temperature monitoring system for flowing molten metal according to claim 2, characterized in that: The second determining module is further configured to perform the following steps: The historical temperature value data set of the target temperature monitoring point within the historical time period is used as the first data set, and the historical temperature value data set of other temperature monitoring points closest to the target temperature monitoring point within the historical time period is used as the second data set; The Pearson correlation coefficient between the first data set and the second data set is used as the correlation coefficient between the temperature values ​​of the target temperature monitoring point and other nearest temperature monitoring points.

4. The temperature monitoring system for flowing molten metal according to claim 1, characterized in that: The temperature value of the target location point is obtained by: , is the temperature value corresponding to the position coordinate d of the target position point, N is the number of target temperature monitoring points, is the temperature value of the i-th target temperature monitoring point, norm is the normalization processing function, is the weight corresponding to the i-th target temperature monitoring point, is the value of the Lagrange basis polynomial corresponding to the i-th target temperature monitoring point at the position coordinate d.

5. The temperature monitoring system for flowing molten metal according to claim 1, characterized in that: The acquisition module is further configured to perform the following steps: The flow velocity of the flowing metal liquid at a plurality of flow velocity monitoring points is obtained by a flow velocity sensor; the flow velocity monitoring point is a position point where the flow velocity is directly measured by the flow velocity sensor, and the flow velocity includes a flow direction and a flow rate; The flow velocity of the flowing metal liquid at the temperature monitoring point is determined according to the flow velocity of the flowing metal liquid at a plurality of flow velocity monitoring points adjacent to the temperature monitoring point.

6. The temperature monitoring system for flowing molten metal according to claim 1, characterized in that: The Lagrange basis polynomial corresponding to the target temperature monitoring point is obtained in the following way: , is the value of the Lagrange basis polynomial corresponding to the i-th target temperature monitoring point at the position coordinate d, N is the number of target temperature monitoring points, is the position coordinate of the jth target temperature monitoring point, Is the multiplication operator.

7. The temperature monitoring system for flowing molten metal according to claim 1, characterized in that: The system further comprises a prompt module, wherein the prompt module is configured to perform the following steps: Determine a target temperature range corresponding to the position coordinates of the target position point from a plurality of temperature ranges; When the temperature value of the target position point is outside the target temperature range, prompt information is output, where the prompt information is used to prompt that the temperature value of the target position point is outside the target temperature range.

8. The temperature monitoring system for flowing molten metal according to claim 1, characterized in that: The system further includes a display module, and the third determination module is further configured to perform the following steps: Generating a temperature distribution diagram of the flowing molten metal according to temperature values ​​of a plurality of target positions and temperature values ​​of a plurality of temperature monitoring points in the flowing molten metal; the temperature distribution diagram includes temperature values ​​of different positions inside a container of the flowing molten metal; The temperature distribution graph is sent to the display module so that the display module displays the temperature distribution graph.

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