A control method, device, medium and product of an ultrasonic welding power supply

Abstract

The embodiment of the application relates to the technical field of ultrasonic waves, and discloses a control method, equipment, medium and product of an ultrasonic welding power supply. The method comprises the following steps: after completing a welding preparation action, performing pressure processing on a welding head, and performing rapid frequency sweeping to obtain a frequency sweeping curve; obtaining a phase difference range according to the frequency sweeping curve to obtain a maximum value and a minimum value of the phase difference; calculating a target phase difference according to the maximum value and the minimum value of the phase difference; selecting a frequency corresponding to the target phase difference as an initial working frequency; and performing ultrasonic frequency tracking control on the ultrasonic welding power supply by using the initial working frequency and taking the target phase difference as a phase difference control target. By using the scheme, the control parameters of the ultrasonic welding power supply can be more in line with actual working requirements, and the obtained control result is more ideal and meets the requirements of different actual welding scenes.

Description

Technical Field

[0001] This application relates to the field of ultrasonic technology, and in particular to a control method, equipment, medium, and product for an ultrasonic welding power source. Background Technology

[0002] In recent years, with the rapid development of science and technology, ultrasonic welding technology has been applied more and more widely.

[0003] Existing digital ultrasonic welding power supply frequency tracking control typically employs a closed-loop control method with a voltage-current phase difference of 0 as the control objective. However, under load, especially heavy load, situations where a voltage-current phase difference of 0 may not exist within the ultrasonic power supply's operating frequency range may arise. In such cases, traditional frequency closed-loop control will malfunction, leading to overcurrent or overvoltage alarms from the generator. Related technologies often use load frequency tracking methods to adjust the detection frequency, but the adjustment direction of the frequency and phase difference is fixed. In actual operation, dynamic changes in the load cause the resonant frequency to vary in different directions. Therefore, it is impossible to achieve reasonable control of the welding power supply based on actual operating conditions. Summary of the Invention

[0004] One objective of this application is to provide a control method, device, medium, and product for an ultrasonic welding power source, at least to address the problem of difficulty in determining welding power source parameters under varying load conditions. This application involves applying pressure to the welding head after welding preparation and performing a rapid frequency sweep to obtain a sweep curve; obtaining the phase difference range from the sweep curve, and determining the maximum and minimum values ​​of the phase difference; calculating the target phase difference based on the maximum and minimum values ​​of the phase difference; selecting the frequency corresponding to the target phase difference as the initial operating frequency; and using the initial operating frequency and the target phase difference as the phase difference control target to perform ultrasonic frequency tracking control of the ultrasonic welding power source. By adopting this scheme, frequency sweeping can be performed based on the pressure of the welding head during actual welding, and the initial operating frequency and target phase difference of the welding operation can be determined based on the information obtained from the frequency sweep. This allows the control parameters of the ultrasonic welding power source to better meet actual working requirements, resulting in more ideal control results that satisfy the needs of different actual welding scenarios.

[0005] To achieve the above objectives, some embodiments of this application provide the following aspects:

[0006] In a first aspect, some embodiments of this application also provide a method for controlling an ultrasonic welding power source, including:

[0007] After completing the welding preparation steps, pressure is applied to the welding head, and a rapid frequency sweep is performed to obtain the frequency sweep curve.

[0008] The phase difference range is obtained based on the frequency sweep curve, and the maximum and minimum values ​​of the phase difference are obtained.

[0009] Calculate the target phase difference based on the maximum and minimum values ​​of the phase difference;

[0010] Select the frequency corresponding to the target phase difference as the initial operating frequency;

[0011] Using the initial operating frequency and the target phase difference as the phase difference control target, ultrasonic frequency tracking control is performed on the ultrasonic welding power supply.

[0012] Secondly, some embodiments of this application also provide an electronic device, the electronic device comprising: one or more processors; and a memory storing computer program instructions, which, when executed, cause the processor to perform the steps of the method described above.

[0013] Thirdly, some embodiments of this application also provide a computer-readable medium having computer program instructions stored thereon, which can be executed by a processor to implement the method described above.

[0014] Fourthly, some embodiments of this application also provide a computer program product, including a computer program / instructions that, when executed by a processor, implement the steps of the method described above.

[0015] Compared with related technologies, the solution provided in this application involves applying pressure to the welding head after completing the welding preparation process and performing a rapid frequency sweep to obtain a frequency sweep curve. The phase difference range is then obtained based on the frequency sweep curve, yielding the maximum and minimum values ​​of the phase difference. A target phase difference is calculated based on these values. The frequency corresponding to the target phase difference is selected as the initial operating frequency. Using the initial operating frequency and the target phase difference as the phase difference control target, ultrasonic frequency tracking control of the ultrasonic welding power supply is performed. By adopting this solution, frequency sweeping can be performed based on the pressure of the welding head during the actual welding process. The initial operating frequency and target phase difference are determined based on the information obtained from the frequency sweep, thereby making the control parameters of the ultrasonic welding power supply more consistent with actual working requirements, resulting in more ideal control results that meet the needs of different actual welding scenarios. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1This is an exemplary flowchart of a control method for an ultrasonic welding power source provided according to some embodiments of this application;

[0018] Figure 2 This is a schematic diagram of a sweep frequency waveform under ideal conditions according to some embodiments of this application;

[0019] Figure 3 This is a schematic diagram of a frequency sweep waveform showing a reduced phase control range after loading, according to some embodiments of this application.

[0020] Figure 4 This is a schematic diagram of a zero-phase sweep frequency waveform with no phase difference after loading, provided according to some embodiments of this application.

[0021] Figure 5 An exemplary structural diagram of the electronic device is disclosed. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] First Embodiment

[0024] The first embodiment of this application relates to a method for controlling an ultrasonic welding power source. For example... Figure 1 As shown, the method is executed by a management tool and may include the following steps:

[0025] Step S101: After completing the welding preparation, pressure is applied to the welding head and a rapid frequency sweep is performed to obtain the frequency sweep curve.

[0026] Ultrasonic welding utilizes high-frequency vibration waves transmitted to the surfaces of two objects to be welded. Under pressure, the surfaces rub against each other, causing fusion between molecular layers. An ultrasonic generator converts 50 / 60 Hz current into 15, 20, 30, or 40 kHz electrical energy. This high-frequency energy is then converted into mechanical motion of the same frequency by a transducer. This mechanical motion is then transmitted to the welding head via an amplitude converter. The welding head transfers the received vibrational energy to the joint of the workpieces to be welded. In this area, the vibrational energy is converted into heat energy through friction, melting the plastic. Welding methods include fusion welding, where the ultrasonic welding head, vibrating at ultra-high frequency, under moderate pressure, causes frictional heat to instantly melt and join the two plastic surfaces. Riveting welding involves pressing the ultrasonic welding head, vibrating at ultra-high frequency, against the protruding tip of a plastic part, causing it to instantly heat and melt into a rivet shape, mechanically joining materials of different materials together. Embedding: Using the transmission of the welding head and appropriate pressure, metal parts are instantly squeezed into pre-drilled plastic holes and fixed at a certain depth. Molding: A concave welding head is pressed against the outer ring of the plastic part. After the welding head emits ultrasonic ultra-high frequency vibrations, the plastic melts and molds, encapsulating the metal object and fixing it in place. Spot welding: Two pieces of plastic are fused together at specific points without the need for pre-designed weld lines, or for larger workpieces or workpieces where pre-designed weld lines are not suitable, achieving a fusion effect through spot welding. Cutting and sealing: Utilizing the principle of instantaneous ultrasonic vibration, synthetic fiber fabrics are cut. It has advantages such as fast welding speed, high welding strength, good sealing performance, low cost, cleanliness and no pollution, and stable welding process.

[0027] Ultrasonic welding power supply control primarily aims to ensure the stable and efficient output of high-frequency electrical energy from the ultrasonic welding power supply. This energy drives the transducer to generate stable mechanical vibrations, thereby achieving high-quality ultrasonic welding. Simultaneously, precise power supply control allows for the adjustment of welding parameters based on different welding materials, workpiece shapes, and welding requirements, optimizing the welding process, improving welding efficiency and quality, and extending equipment lifespan. Automatic frequency tracking is crucial because the resonant frequency of the ultrasonic transducer can drift with changes in ambient temperature and load. Automatic frequency tracking technology monitors the transducer's operating frequency in real time and automatically adjusts the output frequency of the ultrasonic power supply to maintain it near the transducer's resonant frequency, ensuring maximum mechanical vibration efficiency and improving welding effect and stability. Power control precisely controls the output power of the ultrasonic power supply based on the characteristics of the welding material, workpiece thickness, and dimensions to provide appropriate welding energy. Power control methods include constant power control and time-power control, which can be achieved by adjusting parameters such as the power supply's output voltage and current to ensure consistent welding quality. Phase difference control monitors and controls the phase difference between the voltage and current across the ultrasonic transducer to optimize energy transfer and conversion during welding. By adjusting the phase difference, the transducer can better absorb and convert electrical energy into mechanical energy, improving welding efficiency and quality.

[0028] Welding preparation refers to a series of preparatory work that needs to be completed before welding operations, including but not limited to preparing welding materials, inspecting welding equipment, and cleaning the surface of the workpiece, with the aim of creating favorable conditions for subsequent welding operations.

[0029] The welding head is a component in welding equipment that directly contacts the workpiece and transmits energy to achieve welding. Its shape, material, and performance affect the welding quality and effect.

[0030] A frequency sweep curve is a curve obtained through frequency sweeping operations. It reflects the relationship between a physical quantity (such as voltage, current, amplitude, etc.) and frequency within a certain frequency range. In ultrasonic welding, it can be used to analyze and evaluate relevant characteristics during the welding process.

[0031] This solution ensures that all welding preparation steps are performed according to requirements and specifications, reaching a state ready for the next welding operation. This is achieved through the step-by-step inspection and confirmation of each preparatory step. Applying pressure to the welding head ensures close contact between the welding head and the workpiece, guaranteeing effective energy transfer. This pressure is typically obtained by setting and controlling the required pressure value using a pressure regulating device within the welding equipment. Specifically, specialized instruments or equipment can be used to perform continuous frequency scanning within a certain frequency range within a short period to obtain the corresponding frequency sweep curve. The data acquisition method involves the frequency sweep instrument automatically collecting and recording data according to the set frequency range and scanning speed.

[0032] Figure 2 This is a schematic diagram of a sweep frequency waveform under ideal conditions provided according to some embodiments of this application. Figure 3 This is a schematic diagram of a frequency sweep waveform showing a reduced phase control range after loading, according to some embodiments of this application. Figure 4 This is a schematic diagram of a zero-phase sweep frequency waveform with no phase difference provided in some embodiments of this application.

[0033] In one embodiment, optionally, pressure is applied to the welding head and a rapid frequency sweep is performed, including:

[0034] Perform a rapid frequency sweep when the welding head is pressed down to the predetermined position;

[0035] or,

[0036] When the pressure applied to the welding head reaches the predetermined pressure, a rapid frequency sweep is performed.

[0037] When the welding head is pressed down to the predetermined position, a rapid frequency sweep is performed. This can be achieved using a specific drive device, such as a cylinder or electric actuator, to move the welding head vertically downwards until it reaches the pre-set position. This predetermined position is determined based on factors such as the shape and size of the workpiece and the requirements of the welding process. The purpose is to ensure a suitable contact state between the welding head and the workpiece for effective transmission of ultrasonic energy. The rapid frequency sweep operation is initiated the instant the welding head is pressed down to the predetermined position or within a very short time afterward. Frequency sweep refers to the rapid change of the frequency output by the ultrasonic power supply within a certain range. Typically, it starts from a value below the transducer's resonant frequency, gradually increases to a value above the resonant frequency, and then rapidly returns to the starting frequency, repeating this process. By rapidly sweeping the frequency, the optimal resonant frequency of the transducer under the current welding condition can be found, allowing the transducer to output the maximum mechanical vibration amplitude, thereby improving welding efficiency and quality.

[0038] Pressing the welding head down to the predetermined position is a prerequisite for rapid frequency sweeping. Only when the welding head is in the correct position can the resonant frequency matching the current welding conditions be accurately obtained during frequency sweeping. Inaccurate pressing position may lead to uneven contact pressure or unsuitable contact area between the welding head and the workpiece, thus affecting the frequency sweep results and subsequent welding effect.

[0039] When the pressure applied to the welding head reaches the predetermined pressure, a rapid frequency sweep is performed. This can be achieved using a pressure control system, such as a pneumatic regulating valve or a hydraulic pump, to gradually increase the pressure applied to the welding head until the preset pressure value is reached. This predetermined pressure is calculated based on factors such as the characteristics of the welding material, the thickness and strength of the workpiece, ensuring close contact between the workpiece and the welding head during welding without causing damage due to excessive pressure or excessive wear of the welding head. Once the pressure applied to the welding head reaches the predetermined pressure, the rapid frequency sweep process immediately begins. Similar to the frequency sweep at the predetermined pressure point, the output frequency of the ultrasonic power supply is rapidly changed within a certain frequency range to find the optimal resonant frequency of the transducer, thereby obtaining the strongest mechanical vibration effect and ensuring welding quality.

[0040] Preset pressure is a key factor in triggering rapid frequency sweep. Frequency sweeping is only performed when the pressure reaches the set value. This ensures that the welding head always transmits energy with the optimal combination of pressure and frequency during the welding process, enabling the workpiece to achieve good welding results under suitable pressure and vibration conditions. If frequency sweeping is performed before the pressure reaches the preset value, insufficient contact between the welding head and the workpiece may lead to poor ultrasonic energy transmission, thus affecting the welding quality.

[0041] This solution, through its setup, allows for the determination of the phase-frequency curve via frequency sweep before welding begins. The phase control range is then extracted, and a suitable target phase and corresponding frequency are selected as the initial operating frequency. Subsequent operation uses this target phase as the control objective for frequency tracking. This solution requires a rapid frequency sweep before ultrasonic welding and is suitable for metal and plastic welding where applying pressure to the welding head and workpiece increases the load, ensuring that there is no zero phase difference between voltage and current within the operating frequency range.

[0042] Step S102: Obtain the phase difference range based on the frequency sweep curve, and obtain the maximum and minimum values ​​of the phase difference;

[0043] The phase difference range refers to the range of phase differences at different frequencies during the frequency sweep process. It reflects the changes in the phase relationship between relevant physical quantities during welding and is of great significance for analyzing and controlling welding quality.

[0044] The maximum and minimum values ​​refer to the maximum and minimum values ​​within the phase difference range, respectively. These two values ​​can clearly define the boundaries of phase difference changes and help to further understand the characteristics and patterns of the welding process.

[0045] This scheme analyzes and extracts information about the phase difference range from the sweep frequency curve. The determination method is to process and analyze the correspondence between the frequency and the phase difference reflected by the sweep frequency curve to determine the range of phase difference values.

[0046] Step S103: Calculate the target phase difference based on the maximum and minimum values ​​of the phase difference;

[0047] The target phase difference can be a desired phase difference value calculated from the maximum and minimum values ​​of the phase difference according to a specific calculation method or requirement. This value will be used for subsequent operations such as ultrasonic welding power supply control to optimize the welding effect.

[0048] This method uses a specific mathematical formula or algorithm to calculate the target phase difference by substituting the maximum and minimum values ​​of the phase difference. The calculation can be performed manually or automatically using computer software based on a preset calculation method.

[0049] Step S104: Select the frequency corresponding to the target phase difference as the initial operating frequency;

[0050] The target phase difference, which can be the calculated desired phase difference value, is a key reference for selecting the initial operating frequency.

[0051] In ultrasonic welding, frequency refers to the frequency of ultrasonic vibration. It is closely related to welding energy, welding effect, etc. Different frequencies may be suitable for different welding materials and welding requirements.

[0052] The initial operating frequency can refer to the initial frequency value set when ultrasonic welding begins. The selection of this value will directly affect the initial welding effect and the subsequent welding process, and is usually determined based on factors such as the target phase difference.

[0053] The initial operating frequency is determined by using the frequency corresponding to the phase difference with the target. This is done by searching the sweep curve or relevant data records to find the frequency value corresponding to the phase difference with the target, and then using that value as the initial operating frequency.

[0054] Step S105: Using the initial operating frequency and the target phase difference as the phase difference control target, ultrasonic frequency tracking control is performed on the ultrasonic welding power supply.

[0055] Ultrasonic frequency tracking control is a control method that adjusts the output frequency of the ultrasonic welding power source in real time according to set parameters such as the target phase difference during ultrasonic welding, so that the actual phase difference is as close as possible to the target phase difference. This method can effectively improve welding quality and stability.

[0056] The determined initial operating frequency is applied to the parameter settings of the ultrasonic welding power source, causing it to output ultrasonic vibration energy at that frequency. This is obtained by operating the frequency setting function of the ultrasonic welding power source and inputting or selecting the corresponding initial operating frequency value.

[0057] Setting the target phase difference as the target value for phase difference control provides a clear control direction and target requirement for ultrasonic frequency tracking control. This is determined by setting and storing the specific value of the target phase difference as a control parameter within the ultrasonic frequency tracking control system.

[0058] The ultrasonic frequency tracking control operation is initiated and implemented, enabling the ultrasonic welding power supply to automatically adjust its output frequency according to the actual welding conditions and the target phase difference requirements. This is achieved by monitoring the actual phase difference in real time during the welding process and comparing it with the target phase difference. Based on the comparison result, the output frequency of the ultrasonic welding power supply is automatically adjusted to realize dynamic tracking and control of the phase difference.

[0059] The solution provided in this application involves applying pressure to the welding head after completing welding preparation and performing a rapid frequency sweep to obtain a frequency sweep curve. The phase difference range is then obtained from the frequency sweep curve, yielding the maximum and minimum values ​​of the phase difference. A target phase difference is calculated based on these values. The frequency corresponding to the target phase difference is selected as the initial operating frequency. Using this initial operating frequency and the target phase difference as the phase difference control target, ultrasonic frequency tracking control of the ultrasonic welding power supply is performed. By adopting this solution, frequency sweeping can be performed based on the pressure of the welding head during the actual welding process. The initial operating frequency and target phase difference are determined based on the information obtained from the frequency sweep, thereby making the control parameters of the ultrasonic welding power supply more consistent with actual working requirements, resulting in more ideal control results that meet the needs of different actual welding scenarios.

[0060] In one embodiment, optionally, calculating the target phase difference based on the maximum and minimum values ​​of the phase difference includes:

[0061] The average of the maximum and minimum phase differences is taken as the target phase difference.

[0062] In this scheme, specifically, the target phase difference can be taken as the middle value of the phase difference range, that is, (maximum phase difference + minimum phase difference) / 2.

[0063] The method of determining the target phase difference in this scheme is simple to calculate and meets the requirements for welding power supply control.

[0064] In one embodiment, optionally, calculating the target phase difference based on the maximum and minimum values ​​of the phase difference includes:

[0065] Calculate the difference between the maximum and minimum values ​​of the phase difference;

[0066] The target phase difference is determined based on the difference in the magnitude of the change, the minimum value of the phase difference, and a preset adjustment coefficient.

[0067] In another approach, the phase increment can be determined by the difference in the magnitude of the change and a preset adjustment coefficient, and then added to the minimum value of the phase difference to obtain the final target phase difference.

[0068] This solution allows for more controllable calculation of the target phase difference and improves calculation accuracy by setting preset adjustment coefficients.

[0069] In one embodiment, optionally, determining the target phase difference based on the difference in variation amplitude, the minimum value of the phase difference, and a preset adjustment coefficient includes:

[0070] The following formula is used for calculation;

[0071] Target phase difference = k × difference in change amplitude + minimum value;

[0072] Where k is a preset adjustment coefficient.

[0073] Here, k is an adjustment coefficient, ranging from 0 to 1, used to select the position of the target phase difference. The smaller the value of k, the closer the target phase difference is to the minimum value; the larger the value of k, the closer the target phase difference is to the maximum value. When k = 0.5, the implementation process is the same as the previous scheme. Usually, the range of k is 0.4-0.5, which can be adjusted according to the actual test results.

[0074] This solution, by performing a frequency sweep to determine the target phase difference and initial operating frequency before ultrasonic welding, can better address the problem of poor frequency tracking effect or inability to track the frequency correctly due to large loads in traditional methods. The principle of this method is clear, and the operation is simple and easy to implement.

[0075] Furthermore, some embodiments of this application also provide an electronic device. The electronic device can be various forms of digital computer, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, etc. The electronic device can also be various forms of mobile devices, such as personal digital assistants, cellular phones, smartphones, wearable devices, and other similar computing devices.

[0076] The electronic device includes: one or more processors; and a memory storing computer program instructions that, when executed, cause the processor to perform the steps of the methods provided in any one or more of the above embodiments. Figure 5 An exemplary structural diagram of the electronic device is disclosed. For example... Figure 5 As shown, the electronic device includes one or more processors 501, a memory 502, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components are interconnected via different buses and can be mounted on a common motherboard or otherwise as required. The processors can process instructions executed within the electronic device, including instructions stored in or on memory to display graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some other embodiments, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple electronic devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). The components, their connections and relationships, and their functions shown herein are merely examples and are not intended to limit the implementation of the present application described and / or claimed herein.

[0077] The electronic device may further include an input device 503 and an output device 504. The processor 501, memory 502, input device 503, and output device 504 can be connected via a bus or other means. Figure 5 Taking the example of a connection between China and Israel via a bus.

[0078] Input device 503 can receive input numerical or character information, and generate key signal inputs related to user settings and function control of the electronic device, such as a touch screen, keypad, mouse, trackpad, touchpad, joystick, one or more mouse buttons, trackball, joystick, etc. Output device 504 may include a display device, auxiliary lighting device (e.g., LED), and haptic feedback device (e.g., vibration motor). The display device may include, but is not limited to, a liquid crystal display (LCD), a light-emitting diode (LED) display, and a plasma display. In some embodiments, the display device may be a touch screen.

[0079] To provide interaction with the user, the electronic device can be a computer. The computer has: a display device for displaying information to the user (e.g., a cathode-ray tube (CRT) or an LCD monitor); and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the computer. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0080] In this embodiment, a computer-readable medium stores a computer program / instructions that, when executed by a processor, implement the steps of the methods provided in any one or more of the above embodiments. This computer-readable medium may be included in the electronic device described in the above embodiments; or it may exist independently and not assembled into that device. The aforementioned computer-readable medium carries one or more computer-readable instructions.

[0081] The memory 502 can serve as a non-transitory computer-readable storage medium, used to store non-transitory software programs, non-transitory computer-executable programs, and modules. The processor 501 executes various server functions and data processing by running the non-transitory software programs, instructions, and modules stored in the memory 502, thereby implementing the program instructions / modules corresponding to the methods provided in any one or more of the embodiments described above in this application.

[0082] Memory 502 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the electronic device. Furthermore, memory 502 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory 502 may optionally include memory remotely located relative to processor 501, and these remote memories may be connected to the electronic device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0083] It should be noted that the computer-readable medium described in this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM, or flash memory), optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0084] Computer-readable media include both permanent and non-permanent, removable and non-removable media, which can store information by any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change random-access memory (PRAM), static random-access memory (SRAM), dynamic random-access memory (DRAM), other types of random-access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, read-only optical disc (CD-ROM), digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0085] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0086] In the above embodiments, all or part of the implementation can be achieved through software, hardware, firmware, or any combination thereof. For example, it can be implemented using an Application-Specific Integrated Circuit (ASIC), a general-purpose computer, or any other similar hardware device. In some embodiments, the software program of this application can be executed by a processor to implement the above steps or functions. Similarly, the software program of this application (including related data structures) can be stored in a computer-readable recording medium, such as RAM memory, magnetic or optical drives, floppy disks, and similar devices. In addition, some steps or functions of this application can be implemented in hardware, for example, as circuitry that cooperates with a processor to perform the various steps or functions.

[0087] The computer program product provided in this application includes one or more computer programs / instructions. When executed by a processor, these computer programs / instructions generate, in whole or in part, the processes or functions described in this application. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state drive, SSD, etc.).

[0088] The flowcharts or block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of devices, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using a dedicated hardware-specific system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0089] The scope of this application is defined by the appended claims rather than the foregoing description, and is therefore intended to encompass all variations falling within the meaning and scope of equivalents of the claims. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices recited in a device claim may also be implemented by a single unit or device in software or hardware. Terms such as "first," "second," etc., are used only for distinguishing descriptions and do not indicate any particular order, nor should they be construed as indicating or implying relative importance.

[0090] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily made by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims, and the above embodiments should be regarded as exemplary and non-limiting.

Claims

1. A method for controlling an ultrasonic welding power source, characterized in that, The method includes: After completing the welding preparation steps, pressure is applied to the welding head, and a rapid frequency sweep is performed to obtain the frequency sweep curve. The phase difference range is obtained based on the frequency sweep curve, and the maximum and minimum values ​​of the phase difference are obtained. Calculate the target phase difference based on the maximum and minimum values ​​of the phase difference; Select the frequency corresponding to the target phase difference as the initial operating frequency; Using the initial operating frequency and the target phase difference as the phase difference control target, ultrasonic frequency tracking control is performed on the ultrasonic welding power supply.

2. The method according to claim 1, characterized in that, Pressure is applied to the welding head, and a rapid frequency sweep is performed, including: Perform a rapid frequency sweep when the welding head is pressed down to the predetermined position; or, When the pressure applied to the welding head reaches the predetermined pressure, a rapid frequency sweep is performed.

3. The method according to claim 1, characterized in that, Calculating the target phase difference based on the maximum and minimum values ​​of the phase difference includes: The average of the maximum and minimum phase differences is taken as the target phase difference.

4. The method according to claim 1, characterized in that, Calculating the target phase difference based on the maximum and minimum values ​​of the phase difference includes: Calculate the difference between the maximum and minimum values ​​of the phase difference; The target phase difference is determined based on the difference in the magnitude of the change, the minimum value of the phase difference, and a preset adjustment coefficient.

5. The method according to claim 4, characterized in that, The target phase difference is determined based on the difference in amplitude, the minimum value of the phase difference, and a preset adjustment coefficient, including: The following formula is used for calculation; Target phase difference = k × difference in change amplitude + minimum value; Where k is a preset adjustment coefficient.

6. The method according to claim 1, characterized in that, Before calculating the target phase difference based on the maximum and minimum values ​​of the phase difference, the method further includes: It identifies whether the minimum phase difference is less than a set threshold; If so, then the target phase difference of the ultrasonic welding power source is determined to be 0.

7. The method according to claim 6, characterized in that, After identifying whether the minimum phase difference is less than a set threshold, the method further includes: If not, the target phase difference is calculated based on the maximum and minimum values ​​of the phase difference.

8. An electronic device, characterized in that, The electronic device includes: One or more processors; and A memory storing computer program instructions, which, when executed, cause the processor to perform the steps of the method as described in any one of claims 1 to 7.

9. A computer-readable medium having a computer program / instructions stored thereon, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the method according to any one of claims 1 to 7.

10. A computer program product comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the method according to any one of claims 1 to 7.

Images