A method, system, apparatus, and medium for controlling a gold-tin alloy powder preparation process

Abstract

The application discloses a gold-tin alloy powder preparation process control method, system, device and medium, relates to the technical field of metal powder preparation, and comprises the following steps: acquiring the actually measured quantity of gold-tin powder in a second vacuum chamber per unit time; acquiring the actually measured particle size of the gold-tin powder in the second vacuum chamber per unit time; obtaining a powder yield evaluation value according to the actually measured quantity and the actually measured particle size; determining whether the powder yield evaluation value is greater than a preset powder yield threshold value, and if not, inputting the powder yield evaluation value into a preset PID control model to obtain a correction amount of a preset initial key control parameter; wherein the initial key control parameter comprises a vibration frequency of a vibration generating device, an air pressure in a first vacuum chamber, a crucible temperature and an inert gas concentration; and according to the correction amount, the application has the advantages of being capable of effectively controlling the uniformity of powder particle size and improving the powder yield.

Description

Technical Field

[0001] This application relates to the field of metal powder preparation technology, and in particular to a method, system, equipment and medium for controlling the preparation process of gold-tin alloy powder. Background Technology

[0002] Gold-tin alloy powder is widely used in high-end fields such as microelectronic packaging and optoelectronic devices due to its excellent thermal conductivity, electrical conductivity, and welding reliability. Current methods for preparing gold-tin alloy powder mainly employ atomization and mechanical grinding, with atomization being the most widely used due to its high preparation efficiency. However, traditional atomization methods suffer from problems such as poor powder particle size uniformity and lag in process parameter control.

[0003] Currently, gold-tin solution can be discharged and formed into powder using ultrasonic vibration in a vacuum environment. However, the key control parameters of the preparation device are mostly preset fixed values, which cannot be dynamically adjusted according to the actual particle size during the powder formation process. This results in large fluctuations in the particle size of the prepared gold-tin alloy powder, making it difficult to stably control it within the target particle size range, i.e., low powder yield, which increases the preparation cost. Summary of the Invention

[0004] The main objective of this application is to provide a method, system, equipment, and medium for controlling the preparation process of gold-tin alloy powder, aiming to solve the technical problem that existing methods for preparing gold-tin alloy powder are difficult to effectively control the uniformity of powder particle size, resulting in low powder yield.

[0005] To achieve the above objectives, this application provides a method for controlling the preparation process of gold-tin alloy powder, which is used to control a powder preparation device. The powder preparation device includes a first vacuum chamber and a second vacuum chamber located below the first vacuum chamber. Both the first and second vacuum chambers are filled with inert gas. A vibration generating device is provided on the side wall of the first vacuum chamber. A crucible for holding molten gold-tin and whose temperature is controllable is provided at the bottom of the first vacuum chamber. A nozzle communicating with the second vacuum chamber is provided at the bottom of the crucible. The nozzle is used to drip molten gold-tin into the second vacuum chamber to form gold-tin powder.

[0006] The method includes the following steps:

[0007] The measured quantity of gold-tin powder in the second vacuum chamber was obtained per unit time;

[0008] The measured particle size of gold-tin powder in the second vacuum chamber was obtained per unit time;

[0009] Based on the measured quantity and measured particle size, obtain the powder yield evaluation value;

[0010] If the powder yield assessment value is greater than the preset powder yield threshold, then return to the measured quantity of gold-tin powder obtained in the second vacuum chamber per unit time; otherwise, input the powder yield assessment value into the preset PID control model to obtain the correction amount of the preset initial key control parameters. The initial key control parameters include the vibration frequency of the vibration generator, the air pressure in the first vacuum chamber, the crucible temperature, and the inert gas concentration.

[0011] Based on the correction amount, obtain the corrected key control parameters.

[0012] Optionally, a powder yield evaluation value is obtained based on the measured quantity and measured particle size, including:

[0013] Obtain the quantity difference Δn between the measured quantity and the preset ideal quantity;

[0014] The first particle size dataset and the second particle size dataset are selected from the measured particle size. The first particle size dataset consists of several measured particle sizes that are greater than the maximum value of the preset ideal particle size range, and the second particle size dataset consists of several measured particle sizes that are less than the minimum value of the ideal particle size range.

[0015] Obtain the first average value of the first particle size dataset and the second average value of the second particle size dataset;

[0016] Obtain a first difference between a first average value and a preset standard particle size, and obtain a second difference between a second average value and a standard particle size; wherein, both the first difference and the second difference are absolute values;

[0017] The larger of the first and second differences is output as the particle size difference Δd;

[0018] Input the quantity difference Δn and particle size difference Δd into the preset powder yield evaluation model to obtain the powder yield evaluation value Q.

[0019] Optionally, the expression for the powder yield evaluation model is:

[0020] Q = 1 / (K1·Δn + K2·Δd);

[0021] In the formula, K1 is the first adjustment coefficient and K2 is the second adjustment coefficient.

[0022] Optionally, the corrections include a pressure correction ΔP, a crucible temperature correction ΔT, an inert gas concentration correction ΔC, and a vibration frequency correction Δf, and satisfy the following coupling compensation equation:

[0023] ΔP=α·ΔT+β·ΔC+γ·Δf;

[0024] In the formula, α is the first coupling coefficient matrix, β is the second coupling coefficient matrix, and γ is the third coupling coefficient matrix.

[0025] Optionally, the measured quantity of gold-tin powder in the second vacuum chamber is obtained per unit time, including:

[0026] Acquire continuous images of gold-tin powder in the second vacuum chamber per unit time;

[0027] The continuous images were preprocessed to identify the measured quantity of gold-tin powder.

[0028] Optionally, the measured particle size of the gold-tin powder in the second vacuum chamber is obtained per unit time, including:

[0029] The process parameters of gold-tin powder during the preparation process are obtained at preset intervals within a unit of time; wherein, the preset time is the interval between gold-tin droplet discharges.

[0030] Input the process parameters into the preset particle size prediction model to obtain the first predicted particle size of the gold-tin powder;

[0031] Acquire continuous images of gold-tin powder in the second vacuum chamber per unit time;

[0032] The continuous images are preprocessed to identify the second predicted particle size of the corresponding gold-tin powder;

[0033] The average of the first and second predicted particle sizes is output as the measured particle size of the gold-tin powder.

[0034] Optionally, the expression for the particle size prediction model is:

[0035]

[0036] In the formula, D is the first predicted particle size, K is the material constant, σ is the surface tension of the gold-tin melt, ρ1 is the density of the gold-tin melt, g is the gravitational acceleration, f is the vibration frequency, ρ2 is the gas density of the inert gas in the first vacuum chamber, μ1 is the viscosity of the gold-tin melt, and μ2 is the gas viscosity of the inert gas in the first vacuum chamber.

[0037] To achieve the above objectives, this application also provides a gold-tin alloy powder preparation process control system for controlling a powder preparation device. The powder preparation device includes a first vacuum chamber and a second vacuum chamber located below the first vacuum chamber. Both the first and second vacuum chambers are filled with inert gas. A vibration generating device is provided on the side wall of the first vacuum chamber. A crucible for holding molten gold-tin and whose temperature is controllable is provided at the bottom of the first vacuum chamber. A nozzle communicating with the second vacuum chamber is provided at the bottom of the crucible. The nozzle is used to drip molten gold-tin into the second vacuum chamber to form gold-tin powder.

[0038] The system includes:

[0039] The quantity monitoring module is used to obtain the measured quantity of gold-tin powder in the second vacuum chamber per unit time.

[0040] The particle size monitoring module is used to obtain the measured particle size of gold-tin powder in the second vacuum chamber per unit time.

[0041] The powder yield evaluation module is used to obtain the powder yield evaluation value based on the measured quantity and measured particle size.

[0042] The data processing module is used to determine whether the powder yield evaluation value is greater than the preset powder yield threshold. If so, it returns to the measured quantity of gold-tin powder obtained in the second vacuum chamber per unit time. If not, it inputs the powder yield evaluation value into the preset PID control model to obtain the correction amount of the preset initial key control parameters. The initial key control parameters include the vibration frequency of the vibration generator, the air pressure in the first vacuum chamber, the crucible temperature, and the inert gas concentration.

[0043] The parameter correction module is used to obtain the corrected key control parameters based on the correction amount.

[0044] To achieve the above objectives, this application also provides a computer device, which includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the above-described method.

[0045] To achieve the above objectives, this application also provides a computer-readable storage medium storing a computer program, wherein a processor executes the computer program to implement the above-described method.

[0046] The beneficial effects that this application can achieve are as follows:

[0047] This application continuously monitors the measured quantity and particle size of gold-tin powder produced in the second vacuum chamber within a unit time. The measured quantity characterizes the continuity of gold-tin powder production, while the measured particle size primarily characterizes particle size uniformity. Therefore, based on the changes in the measured quantity and particle size, a comprehensive estimate of the gold-tin powder yield can be obtained, and a yield threshold is set. If the yield assessment value is greater than the yield threshold, it indicates that the yield requirement is met, and monitoring continues in the next unit time. Conversely, if the yield is less than the threshold, the yield requirement is not met. In this case, the yield assessment value is input into a preset PID control model to calculate the yield. The correction amount is based on the preset initial key control parameters, which simultaneously take into account multiple core parameters such as the vibration frequency of the vibration generator, the air pressure in the first vacuum chamber, the crucible temperature, and the inert gas concentration. Thus, the above parameters are simultaneously corrected and adjusted to obtain the corrected key control parameters to control the powder preparation device to perform corresponding actions. Therefore, this application can dynamically monitor the powder yield based on the combined changes in the measured quantity and measured particle size of gold and tin powder, and dynamically adjust each key control parameter. It has strong adaptability and improves the uniformity of gold and tin powder particle size, that is, it improves the powder yield. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0049] Figure 1 This is a schematic flowchart illustrating a method for controlling the preparation process of gold-tin alloy powder according to an embodiment of this application.

[0050] Figure 2 This is a schematic diagram of the powder preparation apparatus in an embodiment of this application;

[0051] Figure 3 This is a schematic diagram of the computer device structure of the hardware operating environment involved in the embodiments of this application.

[0052] Figure label:

[0053] 110 - First vacuum chamber, 120 - Second vacuum chamber, 130 - Vibration generating device, 140 - Crucible.

[0054] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0056] It should be noted that if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0057] Example 1

[0058] Reference Figures 1-2 This embodiment provides a method for controlling the preparation process of gold-tin alloy powder, which is used to control the powder preparation device. The powder preparation device includes a first vacuum chamber 110 and a second vacuum chamber 120 located below the first vacuum chamber 110. Both the first vacuum chamber 110 and the second vacuum chamber 120 are filled with inert gas. A vibration generating device 130 is provided on the side wall of the first vacuum chamber 110. A crucible 140 for holding gold-tin melt and with controllable temperature is provided at the bottom of the first vacuum chamber 110. A nozzle communicating with the second vacuum chamber 120 is provided at the bottom of the crucible 140. The nozzle is used to drip gold-tin melt into the second vacuum chamber 120 to form gold-tin powder.

[0059] The method includes the following steps:

[0060] The measured quantity of gold-tin powder in the second vacuum chamber 120 was obtained per unit time;

[0061] The measured particle size of gold-tin powder in the second vacuum chamber 120 was obtained per unit time;

[0062] Based on the measured quantity and measured particle size, obtain the powder yield evaluation value;

[0063] If the powder yield assessment value is greater than the preset powder yield threshold, then return to the measured quantity of gold-tin powder in the second vacuum chamber 120 per unit time; otherwise, input the powder yield assessment value into the preset PID control model to obtain the correction amount of the preset initial key control parameters. The initial key control parameters include the vibration frequency of the vibration generator 130, the air pressure in the first vacuum chamber 110, the temperature of the crucible 140, and the concentration of inert gas.

[0064] Based on the correction amount, obtain the corrected key control parameters.

[0065] In this embodiment, by continuously monitoring the measured quantity and particle size of gold-tin powder formed in the second vacuum chamber 120 per unit time, the measured quantity characterizes the continuity of gold-tin powder output, while the measured particle size primarily characterizes particle size uniformity. Therefore, based on the changes in the measured quantity and measured particle size, a comprehensive estimate of the gold-tin powder yield can be obtained, and a yield threshold is set. If the yield assessment value is greater than the yield threshold, it indicates that the yield requirement is met, and monitoring continues in the next unit time. Conversely, if it is less than the threshold, the yield requirement is not met. In this case, the yield assessment value is input into a preset PID control model to calculate the yield. Based on the preset correction amount of the initial key control parameters, and considering multiple core parameters such as the vibration frequency of the vibration generator 130, the air pressure in the first vacuum chamber 110, the temperature of the crucible 140, and the concentration of inert gas, the above parameters are simultaneously corrected and adjusted to obtain the corrected key control parameters to control the powder preparation device to perform corresponding actions. Therefore, this embodiment can dynamically monitor the powder yield based on the combined changes in the measured quantity and measured particle size of gold and tin powder, and dynamically adjust each key control parameter. It has strong adaptability and improves the uniformity of gold and tin powder particle size, that is, it improves the powder yield.

[0066] It should be noted that the working principle of the above-mentioned powder preparation device is as follows: the vibration generating device 130 generates regular vibration on the first vacuum chamber 110, and uses the inert gas medium in the first vacuum chamber 110 to transmit the vibration, thereby generating vibration pressure on the gold and tin melt in the crucible 140, causing the gold and tin melt to be discharged from the dropper at the bottom of the crucible 140. The inner diameter of the dropper is extremely small, thus forming extremely fine gold and tin droplets that enter the second vacuum chamber 120. Since there is no air fluctuation in the second vacuum chamber 120, the gold and tin droplets gradually cool and solidify during the falling process to form spherical gold and tin powder with high sphericity.

[0067] The expression for the above PID control model is:

[0068]

[0069] In the formula, u(t) is the correction amount corresponding to at least one of the vibration frequency, the gas pressure in the first vacuum chamber 110, the temperature of the crucible 140, and the concentration of inert gas; e(t) is the powder yield deviation, that is, the difference between the powder yield assessment value and the powder yield threshold; Kp is the proportional coefficient used to control the response speed; Ki is the integral coefficient used to eliminate steady-state error; and Kd is the differential coefficient used to suppress rapid changes. Therefore, the parameters can be automatically adjusted according to the real-time powder yield deviation to make the powder particle size more stable.

[0070] As an optional implementation, a powder yield evaluation value is obtained based on the measured quantity and measured particle size, including:

[0071] Obtain the quantity difference Δn between the measured quantity and the preset ideal quantity;

[0072] The first particle size dataset and the second particle size dataset are selected from the measured particle size. The first particle size dataset consists of several measured particle sizes that are greater than the maximum value of the preset ideal particle size range, and the second particle size dataset consists of several measured particle sizes that are less than the minimum value of the ideal particle size range.

[0073] Obtain the first average value of the first particle size dataset and the second average value of the second particle size dataset;

[0074] Obtain a first difference between a first average value and a preset standard particle size, and obtain a second difference between a second average value and a standard particle size; wherein, both the first difference and the second difference are absolute values;

[0075] The larger of the first and second differences is output as the particle size difference Δd;

[0076] Input the quantity difference Δn and particle size difference Δd into the preset powder yield evaluation model to obtain the powder yield evaluation value Q.

[0077] In this embodiment, the powder yield is evaluated based on the difference between the actual data (including quantity and particle size) of the monitored gold-tin powder and the ideal data. The ideal quantity set in this embodiment is the quantity of gold-tin powder that is continuously and uniformly discharged under ideal conditions. However, in reality, due to the influence of the preparation environment and equipment, it is difficult to maintain this ideal state. Therefore, the actual quantity of gold-tin powder is generally less than the quantity of gold-tin powder. The difference Δn between the two quantities can characterize the continuity of gold-tin powder discharge. When calculating the particle size deviation, considering that the particle size of the discharged gold-tin powder may be both greater than and less than the ideal particle size range, the corresponding first particle size dataset and second particle size dataset are first selected. The dataset is used to calculate the first and second average values. If the first or second particle size dataset contains only one measured particle size data, the measured particle size data is output as the corresponding first or second average value. Then, the difference between the first and second average values ​​and the standard particle size (which can be the median of the ideal particle size range) is calculated. The larger of the two differences better represents the degree of deviation. Therefore, the larger of the first and second differences is output as the particle size difference Δd. Finally, the quantity difference Δn and the particle size difference Δd are input into the preset powder yield evaluation model to quantitatively calculate the powder yield evaluation value Q. The calculation is accurate and reliable, providing an effective data reference.

[0078] As an optional implementation method, the expression for the powder yield evaluation model is:

[0079] Q = 1 / (K1·Δn + K2·Δd);

[0080] In the formula, K1 is the first adjustment coefficient and K2 is the second adjustment coefficient.

[0081] In this embodiment, a larger quantity difference Δn and a larger particle size difference Δd both indicate a low powder yield. Therefore, Δn and Δd are inversely proportional to Q. At the same time, the quantity difference Δn and the particle size difference Δd are converted and adjusted by the first adjustment coefficient K1 and the second adjustment coefficient K2, respectively, so that the differences with different unit attributes can be superimposed. Furthermore, weighting coefficients can be assigned to the first adjustment coefficient K1 and the second adjustment coefficient K2 to characterize the degree of influence of quantity and particle size on the powder yield, thereby accurately quantifying and calculating the powder yield evaluation value Q.

[0082] As an optional implementation, the correction amounts include a pressure correction ΔP, a crucible 140 temperature correction ΔT, an inert gas concentration correction ΔC, and a vibration frequency correction Δf, and satisfy the following coupling compensation equation:

[0083] ΔP=α·ΔT+β·ΔC+γ·Δf;

[0084] In the formula, α is the first coupling coefficient matrix, β is the second coupling coefficient matrix, and γ is the third coupling coefficient matrix.

[0085] In this embodiment, since the key control parameters are related to each other, when one parameter changes, the other parameters may need to change accordingly to maintain the balance of the preparation process. For example, after adjusting the temperature of crucible 140, the gas pressure also needs to be adjusted accordingly. Based on the above-mentioned coupling compensation equation, the adjustment method and adjustment amount of each key control parameter can be coupled and compensated to avoid imbalance caused by over-adjustment of a single parameter, which would affect the powder yield. This further improves the accuracy of powder yield control.

[0086] As an optional implementation, obtaining the measured quantity of gold-tin powder within the second vacuum chamber 120 per unit time includes:

[0087] Acquire continuous images of gold-tin powder within the second vacuum chamber 120 per unit time;

[0088] The continuous images were preprocessed to identify the measured quantity of gold-tin powder.

[0089] In this embodiment, a CMOS high-speed camera can be installed at a corresponding position on the side wall of the second vacuum chamber 120 to acquire continuous images of gold-tin powder inside the second vacuum chamber 120. Each continuous image contains multiple gold-tin powder features, and there should be no overlapping gold-tin powder features between adjacent continuous images. Therefore, the camera acquisition frequency can be set according to the gold-tin solution discharge frequency. Then, the continuous images are preprocessed (including binarization, noise reduction, image enhancement, etc.) to facilitate the identification and extraction of gold-tin powder features, so as to identify the measured quantity of gold-tin powder in each image.

[0090] As an optional implementation, obtaining the measured particle size of gold-tin powder within the second vacuum chamber 120 per unit time includes:

[0091] The process parameters of gold-tin powder during the preparation process are obtained at preset intervals within a unit of time; wherein, the preset time is the interval between gold-tin droplet discharges.

[0092] Input the process parameters into the preset particle size prediction model to obtain the first predicted particle size of the gold-tin powder;

[0093] Acquire continuous images of gold-tin powder within the second vacuum chamber 120 per unit time;

[0094] The continuous images are preprocessed to identify the second predicted particle size of the corresponding gold-tin powder;

[0095] The average of the first and second predicted particle sizes is output as the measured particle size of the gold-tin powder.

[0096] In this embodiment, when calculating the measured particle size of gold-tin powder, multiple corresponding process parameters are first input into the particle size prediction model to calculate the first predicted particle size of the gold-tin powder. At the same time, combined with machine vision recognition technology, the second predicted particle size of the corresponding gold-tin powder is calculated by collecting continuous images. A continuous image can contain multiple gold-tin powders, so the second predicted particle size of multiple gold-tin powders can be calculated separately. Then, the average value of the first predicted particle size and the corresponding second predicted particle size is output as the measured particle size of a certain gold-tin powder. This embodiment uses two calculation methods to comprehensively calculate the particle size, which reduces the error of a single calculation method, improves the calculation accuracy, and provides an accurate data basis for subsequent judgment on whether to trigger parameter correction.

[0097] As an optional implementation, the expression for the particle size prediction model is:

[0098]

[0099] In the formula, D is the first predicted particle size, K is the material constant (generally 0.85 for gold-tin alloys), σ is the surface tension of the gold-tin melt, ρ1 is the density of the gold-tin melt, g is the gravitational acceleration, f is the vibration frequency, ρ2 is the gas density of the inert gas in the first vacuum chamber 110, μ1 is the viscosity of the gold-tin melt, and μ2 is the gas viscosity of the inert gas in the first vacuum chamber 110.

[0100] In this embodiment, the gold-tin solution is prepared by placing gold-tin raw material rods above crucible 140 and then heating the rods to melt them within crucible 140. When the melted gold-tin raw material rods form droplets within crucible 140, they affect the surface tension of the molten gold-tin. The properties of the molten gold-tin and the gas environment are also taken into consideration. Therefore, in the above formula, the parameter within the square root is based on the gold-tin droplet breakage mechanism. Surface tension, density, and gravity affect droplet stability, while vibration frequency and gas density determine the degree of breakage. High-frequency vibration and low gas density promote droplet refinement. The parameter within parentheses is related to droplet deformation resistance; when the molten liquid viscosity is high or the gas viscosity is low, the droplets are more difficult to deform, resulting in larger particle sizes. The K value needs to be calibrated according to the material, and may need adjustment for different alloys or process conditions. Thus, the particle size of the gold-tin powder is accurately estimated based on the above formula, providing a more accurate data basis for subsequent determination of whether parameter correction is triggered.

[0101] In summary, this embodiment combines powder yield calculation, parameter adjustment, and compensation coupling, which work together to precisely control powder particle size, thereby effectively improving powder yield.

[0102] Example 2

[0103] Based on the same inventive concept as the foregoing embodiments, this embodiment also provides a gold-tin alloy powder preparation process control system for controlling a powder preparation device. The powder preparation device includes a first vacuum chamber 110 and a second vacuum chamber 120 located below the first vacuum chamber 110. Both the first vacuum chamber 110 and the second vacuum chamber 120 are filled with inert gas. A vibration generating device 130 is provided on the side wall of the first vacuum chamber 110. A crucible 140 for holding molten gold-tin and whose temperature is controllable is provided at the bottom of the first vacuum chamber 110. A nozzle communicating with the second vacuum chamber 120 is provided at the bottom of the crucible 140. The nozzle is used to drip molten gold-tin into the second vacuum chamber 120 to form gold-tin powder.

[0104] The system includes:

[0105] The quantity monitoring module is used to obtain the measured quantity of gold-tin powder in the second vacuum chamber 120 per unit time;

[0106] The particle size monitoring module is used to obtain the measured particle size of gold-tin powder in the second vacuum chamber 120 per unit time.

[0107] The powder yield evaluation module is used to obtain the powder yield evaluation value based on the measured quantity and measured particle size.

[0108] The data processing module is used to determine whether the powder yield evaluation value is greater than the preset powder yield threshold. If so, it returns to the measured quantity of gold-tin powder in the second vacuum chamber 120 per unit time. If not, it inputs the powder yield evaluation value into the preset PID control model to obtain the correction amount of the preset initial key control parameters. The initial key control parameters include the vibration frequency of the vibration generator 130, the air pressure in the first vacuum chamber 110, the temperature of the crucible 140, and the concentration of inert gas.

[0109] The parameter correction module is used to obtain the corrected key control parameters based on the correction amount.

[0110] The explanations and examples of the modules in this embodiment can be found in the methods of the foregoing embodiments, and will not be repeated here.

[0111] Example 3

[0112] Based on the same inventive concept as the foregoing embodiments, this embodiment provides a computer device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the above-described method.

[0113] As an optional implementation method, refer to Figure 3 , Figure 3This is a schematic diagram of the computer device structure of the hardware operating environment involved in this embodiment. The computer device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to realize communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard. Optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk storage device. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0114] Those skilled in the art will understand that Figure 3 The structure shown does not constitute a limitation on the computer device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0115] like Figure 3 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a data storage module, a network communication module, a user interface module, and electronic programs.

[0116] exist Figure 3 In the computer device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the computer device of this embodiment can be set in the computer device. The computer device calls the gold-tin alloy powder preparation process control system stored in the memory 1005 through the processor 1001 and executes the gold-tin alloy powder preparation process control method provided in the above embodiment.

[0117] Example 4

[0118] Based on the same inventive concept as the foregoing embodiments, this embodiment provides a computer-readable storage medium storing a computer program, and a processor executes the computer program to implement the above-described method.

[0119] In some embodiments, the computer-readable storage medium may be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, flash memory, magnetic surface memory, optical disk, or CD-ROM; or it may be a variety of devices including one or any combination of the above-mentioned memories.

[0120] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method of controlling a process for preparing a gold-tin alloy powder, characterized by, The powder preparation device is used to control the powder preparation device, which includes a first vacuum chamber and a second vacuum chamber located below the first vacuum chamber. Both the first and second vacuum chambers are filled with inert gas. A vibration generating device is provided on the side wall of the first vacuum chamber. A crucible for holding molten gold and tin and whose temperature is controllable is provided at the bottom of the first vacuum chamber. A nozzle communicating with the second vacuum chamber is provided at the bottom of the crucible. The nozzle is used to drip molten gold and tin into the second vacuum chamber to form gold and tin powder. The method includes the following steps: The measured quantity of gold-tin powder in the second vacuum chamber was obtained per unit time; The measured particle size of gold-tin powder in the second vacuum chamber was obtained per unit time; Based on the measured quantity and measured particle size, a powder yield evaluation value is obtained; this includes: obtaining the quantity difference Δn between the measured quantity and the preset ideal quantity; filtering out a first particle size dataset and a second particle size dataset from the measured particle sizes; wherein, the first particle size dataset consists of several measured particle sizes that are greater than the maximum value of the preset ideal particle size range, and the second particle size dataset consists of several measured particle sizes that are less than the minimum value of the ideal particle size range; obtaining the first average value of the first particle size dataset and the second average value of the second particle size dataset; obtaining the first difference between the first average value and the preset standard particle size, and obtaining the second difference between the second average value and the standard particle size; wherein, both the first difference and the second difference are absolute values; outputting the larger of the first difference and the second difference as the particle size difference Δd; inputting the quantity difference Δn and the particle size difference Δd into a preset powder yield evaluation model to obtain the powder yield evaluation value Q; If the powder yield assessment value is greater than the preset powder yield threshold, then return to the measured quantity of gold-tin powder obtained in the second vacuum chamber per unit time; otherwise, input the powder yield assessment value into the preset PID control model to obtain the correction amount of the preset initial key control parameters. The initial key control parameters include the vibration frequency of the vibration generator, the air pressure in the first vacuum chamber, the crucible temperature, and the inert gas concentration. Based on the correction amount, obtain the corrected key control parameters.

2. The method for controlling the preparation process of gold-tin alloy powder as described in claim 1, characterized in that, The expression for the powder yield evaluation model is: Q = 1 / (K1·Δn + K2·Δd); In the formula, K1 is the first adjustment coefficient and K2 is the second adjustment coefficient.

3. The method for controlling the preparation process of gold-tin alloy powder as described in claim 1 or 2, characterized in that, The corrections include pressure correction ΔP, crucible temperature correction ΔT, inert gas concentration correction ΔC, and vibration frequency correction Δf, and satisfy the following coupled compensation equations: ΔP=α·ΔT+β·ΔC+γ·Δf; In the formula, α is the first coupling coefficient matrix, β is the second coupling coefficient matrix, and γ is the third coupling coefficient matrix.

4. The method of claim 1, wherein the gold-tin alloy powder production process is controlled by the steps of: The measured quantity of gold-tin powder in the second vacuum chamber per unit time includes: ​ Acquire continuous images of gold-tin powder in the second vacuum chamber per unit time; The continuous images were preprocessed to identify the measured quantity of gold-tin powder.

5. The method for controlling the preparation process of gold-tin alloy powder as described in claim 1, characterized in that, The measured particle size of gold-tin powder in the second vacuum chamber was obtained per unit time, including: The process parameters of gold-tin powder during the preparation process are obtained at preset intervals within a unit of time; wherein, the preset time is the interval between gold-tin droplet discharges. Input the process parameters into the preset particle size prediction model to obtain the first predicted particle size of the gold-tin powder; Acquire continuous images of gold-tin powder in the second vacuum chamber per unit time; The continuous images are preprocessed to identify the second predicted particle size of the corresponding gold-tin powder; The average of the first and second predicted particle sizes is output as the measured particle size of the gold-tin powder.

6. The method for controlling the preparation process of gold-tin alloy powder as described in claim 5, characterized in that, The expression for the particle size prediction model is: In the formula, D is the first predicted particle size, K is the material constant, σ is the surface tension of the gold-tin melt, ρ1 is the density of the gold-tin melt, g is the gravitational acceleration, f is the vibration frequency, ρ2 is the gas density of the inert gas in the first vacuum chamber, μ1 is the viscosity of the gold-tin melt, and μ2 is the gas viscosity of the inert gas in the first vacuum chamber.

7. A control system for the preparation process of gold-tin alloy powder, characterized in that, The powder preparation device is used to control the powder preparation device, which includes a first vacuum chamber and a second vacuum chamber located below the first vacuum chamber. Both the first and second vacuum chambers are filled with inert gas. A vibration generating device is provided on the side wall of the first vacuum chamber. A crucible for holding molten gold and tin and whose temperature is controllable is provided at the bottom of the first vacuum chamber. A nozzle communicating with the second vacuum chamber is provided at the bottom of the crucible. The nozzle is used to drip molten gold and tin into the second vacuum chamber to form gold and tin powder. The system includes: The quantity monitoring module is used to obtain the measured quantity of gold-tin powder in the second vacuum chamber per unit time. The particle size monitoring module is used to obtain the measured particle size of gold-tin powder in the second vacuum chamber per unit time. The powder yield evaluation module is used to obtain a powder yield evaluation value based on the measured quantity and measured particle size. This includes: obtaining the quantity difference Δn between the measured quantity and the preset ideal quantity; filtering out a first particle size dataset and a second particle size dataset from the measured particle sizes; wherein the first particle size dataset consists of several measured particle sizes that are greater than the maximum value of the preset ideal particle size range, and the second particle size dataset consists of several measured particle sizes that are less than the minimum value of the ideal particle size range; obtaining a first average value of the first particle size dataset and a second average value of the second particle size dataset; obtaining a first difference between the first average value and the preset standard particle size, and obtaining a second difference between the second average value and the standard particle size; wherein both the first and second differences are absolute values; outputting the larger of the first and second differences as the particle size difference Δd; and inputting the quantity difference Δn and the particle size difference Δd into a preset powder yield evaluation model to obtain the powder yield evaluation value Q. The data processing module is used to determine whether the powder yield evaluation value is greater than the preset powder yield threshold. If so, it returns to the measured quantity of gold-tin powder obtained in the second vacuum chamber per unit time. If not, it inputs the powder yield evaluation value into the preset PID control model to obtain the correction amount of the preset initial key control parameters. The initial key control parameters include the vibration frequency of the vibration generator, the air pressure in the first vacuum chamber, the crucible temperature, and the inert gas concentration. The parameter correction module is used to obtain the corrected key control parameters based on the correction amount.

8. A computer device, comprising: The computer device includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement a method for controlling the preparation process of gold-tin alloy powder as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and a processor executes the computer program to realize the gold-tin alloy powder preparation process control method in any one of claims 1-6.

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