A pressure calibration method, system, device, and storage medium

Abstract

The application discloses a pressure calibration method, system, device and storage medium, and the method comprises the following steps: determining the design driving information of a driver, and obtaining the stable current information of a motor according to the design driving information; obtaining the input pressure information and test output pressure information of a welding head, and obtaining a parameter calculation formula according to the input pressure information, the test output pressure information and the stable current information; obtaining the output current information corresponding to the welding head according to the input pressure information and the parameter calculation formula; obtaining the actual output pressure information according to the output current information; and completing the pressure calibration of the wire bonding machine when the input pressure information and the actual output pressure information meet preset requirements. The current changes towards stability when the welding head moves, the conversion formula of the input pressure and the output current is determined, the output current is obtained through the input pressure, the welding head output pressure is obtained, the actual output pressure is consistent with the input pressure, and the pressure calibration precision of the wire bonding machine is improved.

Description

Technical Field

[0001] This invention relates to the field of wire bonding equipment, and more particularly to a pressure calibration method, system, device, and storage medium. Background Technology

[0002] In the current semiconductor wire bonding machine welding process, different welding materials require different welding processes, which makes the pressure accuracy requirement very high. Therefore, the pressure calibration method is crucial. The more accurate the calibration pressure, the easier the debugging will be.

[0003] In the existing technology, some manufacturers will calibrate the pressure before leaving the factory. Usually, only a few commonly used pressures are calibrated. Generally, the relationship between the current command and the actual welding force is calibrated by injecting current into the welding head motor, and only the welding force coefficient is determined to form the welding force calibration.

[0004] However, existing technologies for calibrating wire bonding machines rely solely on the welding force coefficient to determine the relationship between current and welding force. This leads to an inaccurate relationship between input pressure and output current, resulting in discrepancies between the actual output pressure and the input pressure. Consequently, the pressure calibration accuracy of the wire bonding machine is low, affecting the welding effect during operation.

[0005] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide a pressure calibration method, system, device and storage medium, which aims to achieve consistency between input pressure and actual output pressure, thereby improving the pressure calibration accuracy of the wire bonding machine and ensuring the welding effect of the wire bonding machine.

[0007] The technical solution of the present invention is as follows:

[0008] In a first aspect, the present invention provides a pressure calibration method applied to a wire bonding machine, the wire bonding machine comprising a motor, a driver, and a welding head; the method comprising:

[0009] Determine the design drive information of the driver, and obtain the stable current information of the motor based on the design drive information;

[0010] The input pressure information and test output pressure information of the welding head are obtained, and the parameter calculation formula of the wire bonding machine is obtained based on the input pressure information, the test output pressure information and the stable current information.

[0011] Based on the input pressure information and the parameter calculation formula, the output current information corresponding to the welding head is obtained;

[0012] Based on the output current information, the actual output pressure information of the wire bonding machine is obtained;

[0013] When the input pressure information and the actual output pressure information meet the preset requirements, the pressure calibration of the wire bonding machine is completed.

[0014] In one implementation, the input pressure information includes a first input pressure, the test output pressure information includes the actual first test output pressure, and the parameter conversion formula is a linear relationship formula between input pressure and output current.

[0015] The step of obtaining the parameter calculation formula for the wire bonding machine based on the input pressure information, the test output pressure information, and the stable current information includes:

[0016] Based on the stable current information, the first calibration parameters of the wire bonding machine are determined;

[0017] The second calibration parameters of the wire bonding machine are determined based on the first input pressure and the first test output pressure.

[0018] The parameter calculation formula is obtained based on the first calibration parameter and the second calibration parameter.

[0019] In one implementation, the stable current information includes current data corresponding to multiple nodes when the welding head moves at a constant speed;

[0020] The step of determining the first calibration parameters of the wire bonding machine based on the stable current information includes:

[0021] Based on the current data corresponding to the multiple nodes, the stable output current of the motor is determined;

[0022] The value of the stable output current is used as the first calibration parameter.

[0023] In one implementation, determining the second calibration parameter of the wire bonding machine based on the first input pressure and the first test output pressure includes:

[0024] Obtain the initial parameters of the wire bonding machine;

[0025] The product of the initial parameter and the first test output pressure is used as an intermediate value;

[0026] The quotient of the intermediate value and the first input pressure is used as the second calibration parameter.

[0027] In one implementation, the output current information includes a first output current, and the actual output pressure information includes a first actual output pressure;

[0028] The step of obtaining the output current information corresponding to the welding head based on the input pressure information and the parameter calculation formula includes:

[0029] Substitute the first input pressure into the parameter calculation formula to obtain the first output current corresponding to the first input pressure;

[0030] Determining the actual output pressure information of the wire bonding machine based on the output current information includes:

[0031] The first actual output pressure is obtained based on the first output current.

[0032] In one implementation, the step of completing the pressure calibration of the wire bonding machine when the input pressure information and the actual output pressure information meet preset requirements includes:

[0033] Obtain the allowable pressure error range of the welding head;

[0034] The difference between the first input pressure and the first actual output pressure is taken as the actual error;

[0035] When the actual error is within the allowable pressure error range, the actual output pressure of the wire bonding machine after pressure calibration is determined to be accurate.

[0036] In one implementation, the design driving information is design current loop parameters; the method further includes:

[0037] When the actual output pressure information does not meet the preset requirements with the designed output pressure information, the design current loop parameters of the driver are updated, and the updated design current loop parameters are used as the design current loop parameters. The process continues to execute the steps of obtaining the stable current information of the motor based on the design current loop parameters, obtaining the parameter calculation formula of the wire bonding machine based on the input pressure information, the test output pressure information, and the stable current information, obtaining the output current information corresponding to the welding head based on the input pressure information and the parameter calculation formula, and obtaining the actual output pressure information of the wire bonding machine based on the output current information, until the input pressure information and the actual output pressure information meet the preset requirements, and the pressure calibration of the wire bonding machine is determined to be completed.

[0038] Secondly, the present invention provides a pressure calibration system, comprising:

[0039] The determination module is used to determine the design drive information of the driver and obtain the stable current information of the motor based on the design drive information;

[0040] The calculation module is used to acquire the input pressure information and test output pressure information of the welding head, and to obtain the parameter calculation formula of the wire bonding machine based on the input pressure information, the test output pressure information and the stable current information.

[0041] The input module is used to obtain the output current information corresponding to the welding head based on the input pressure information and the parameter calculation formula;

[0042] The output module is used to obtain the actual output pressure information of the wire bonding machine based on the output current information;

[0043] The determination module is used to complete the pressure calibration of the wire bonding machine when the input pressure information and the actual output pressure information meet the preset requirements.

[0044] Thirdly, the present invention provides an electronic device, comprising:

[0045] At least one processor, and at least one memory communicatively connected to the processor;

[0046] The memory stores computer-executed instructions;

[0047] The processor executes computer execution instructions stored in the memory to implement the method as described in any one of the above statements.

[0048] Fourthly, the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any of the preceding claims.

[0049] Beneficial Effects: This invention provides a pressure calibration method, system, device, and storage medium. The method is applied to a wire bonding machine, which includes a motor, a driver, and a welding head. The method includes: determining the design drive information of the driver and obtaining the stable current information of the motor based on the design drive information; acquiring the input pressure information and test output pressure information of the welding head, and obtaining the parameter calculation formula of the wire bonding machine based on the input pressure information, the test output pressure information, and the stable current information; obtaining the output current information corresponding to the welding head based on the input pressure information and the parameter calculation formula; obtaining the actual output pressure information of the wire bonding machine based on the output current information; and completing the pressure calibration of the wire bonding machine when the input pressure information and the actual output pressure information meet preset requirements. By adjusting the driver, the current change of the motor tends to stabilize when the welding head moves. Based on the linear function relationship between input pressure and output current, the conversion formula between input pressure and output current is determined. The output current obtained from the input pressure is used to control the output pressure of the welding head by the motor, thereby making the actual output pressure consistent with the input pressure. This improves the pressure calibration accuracy of the wire bonding machine and ensures the welding effect of the wire bonding machine. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is a flowchart of the pressure calibration method of the present invention;

[0052] Figure 2 This is another flowchart of the pressure calibration method of the present invention;

[0053] Figure 3 This is a schematic diagram of the pressure calibration system of the present invention;

[0054] Figure 4 This is a schematic diagram of the electronic device of the present invention. Detailed Implementation

[0055] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the technical solutions in the embodiments of this invention 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 invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0056] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0057] In related technologies, some manufacturers calibrate the pressure before shipping. Usually, only a few commonly used pressures are calibrated, which is not very accurate and the precision is not high. The less commonly used pressures are even less accurate. Generally, the welding force is calibrated by injecting current into the welding head motor, calibrating the relationship between the current command and the actual welding force, and determining the welding force coefficient.

[0058] However, existing technologies for calibrating wire bonding machines rely solely on the welding force coefficient to determine the relationship between current and welding force. This leads to inaccurate relationships between input pressure and output current, resulting in discrepancies between actual output pressure and input pressure. Consequently, the pressure calibration accuracy of the wire bonding machine is low, affecting the welding performance during operation.

[0059] To address the aforementioned issues, the pressure calibration method provided by this invention is applied to a wire bonding machine. By adjusting the driver, the current change of the motor tends to stabilize when the welding head moves. Based on the linear function relationship between input pressure and output current, the conversion formula between input pressure and output current is determined. The output current obtained from the input pressure is used to control the output pressure of the welding head by the motor, thereby making the actual output pressure consistent with the input pressure. This improves the pressure calibration accuracy of the wire bonding machine and ensures the welding effect of the wire bonding machine.

[0060] It is worth noting that the welding force and current are not directly proportional, but rather a linear function (e.g., Y = AX + B, where X is the input pressure, Y is the output current, A is the slope, and B is the intercept).

[0061] The following is an introduction to wire bonding machines used in pressure calibration methods:

[0062] The wire bonding machine includes a motor, a driver, and a welding head. The motor drives the welding head to move, thereby outputting pressure to the workpiece to be welded. During calibration, a pressure sensor is installed on the welding head to detect the actual output pressure of the welding head.

[0063] It is understandable that the motor and the driver are two components of an electric motor system. The motor is a device that converts electrical energy into mechanical energy; the driver (also known as a motor driver or motor controller) is the control device for the operation of the motor. It accepts control signals from external sources (such as chips or processors) and converts the signals into current, voltage, or pulse signals that the motor can understand, thereby realizing the control of the motor.

[0064] The technical solution of the present invention will be described in detail below with reference to specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0065] Figure 1 This is a flowchart illustrating a pressure calibration method provided in an embodiment of the present invention. Figure 1 As shown, the execution subject of the method is a chip, and the method includes:

[0066] Step S100: Determine the design drive information of the driver, and obtain the stable current information of the motor based on the design drive information.

[0067] In one implementation, the design driving information includes design current loop parameters, and the stable current information includes current data corresponding to multiple nodes when the welding head moves at a constant speed; step S100 specifically includes:

[0068] Step S110: Determine the stable current range of the motor;

[0069] Step S120: When the difference between the current data corresponding to each two adjacent nodes is within the current stability range, the current loop parameter of the driver is used as the design current loop parameter.

[0070] Specifically, under the initial current loop parameters of the driver, the driver controls the motor to make the welding head move at a constant speed within the upper and lower limits. The change in motor current during the constant speed change of the welding head is detected, and the initial current loop parameters are adjusted according to the motor current change until the change in motor current during the constant speed movement of the welding head tends to stabilize (i.e., the current change is within the current stability range). In this embodiment, the current stability range is ±10mA. When the difference between the current values ​​of any two adjacent nodes is within ±10mA, the current change is considered to be stabilizing. Thus, the current current loop parameters are used as the design current loop parameters so that the driver can use these design current loop parameters to control the motor to drive the welding head movement.

[0071] It's important to note that adjusting the current loop parameters of the driver is crucial for ensuring the stability and accuracy of current changes. Current loop parameters refer to the relevant parameters used to control the current in the motor driver, including the proportional gain (KPC) and integral gain (KIC). When the welding head of the wire bonding machine moves at a constant speed, current stability is paramount. The purpose of current loop control is to compare the driver's output current with the set value and adjust it based on the error, making the output current as close to the set value as possible. Adjusting the current loop parameters improves the accuracy and stability of current control. The process of adjusting current loop parameters typically involves changing parameters such as the proportional gain and integral time, observing the current response speed and stability. Appropriate adjustments to these parameters can make current changes smoother and more stable, reducing current fluctuations. Adjusting the driver's current loop parameters is necessary to ensure current stability. This allows for more precise current control, guaranteeing the stability of the pressure applied by the welding head. Simultaneously, a stable current also contributes to improved welding quality and stability.

[0072] When the welding head of a wire bonding machine moves at a constant speed, the current change in the motor tends to stabilize in order to calibrate the pressure relationship of the welding force. This principle is based on the linear relationship between pressure and current. The force generated by the welding head during operation is produced by the pressure provided by the motor. When current passes through the motor, the motor generates a certain torque, driving the welding head to move. If the current is stable enough, the motor torque will also tend to stabilize, thus ensuring high stability of the pressure applied by the welding head. By calibrating the pressure relationship of the welding force, the linear relationship between the input and output pressure can be ensured, which is to guarantee the stability of the welding quality. Therefore, when calibrating the welding force, it is necessary to ensure the stability of the current to guarantee high accuracy and stability of the pressure applied by the welding head.

[0073] Step S200: Obtain the input pressure information and test output pressure information of the welding head, and obtain the parameter calculation formula of the wire bonding machine based on the input pressure information, the test output pressure information and the stable current information.

[0074] In one implementation, the input pressure information includes a first input pressure, the test output pressure information includes the actual first test output pressure, and the parameter conversion formula is a linear relationship formula between input pressure and output current.

[0075] Based on the linear function relationship between the input pressure of the welding head and the output current of the motor, the preliminary parameter calculation formula is set as Y = AX + B, where X is the input pressure, Y is the output current, A is the second calibration parameter (i.e., slope), and B is the first calibration parameter (i.e., intercept).

[0076] Step S200 specifically includes:

[0077] Step S210: Determine the first calibration parameters of the wire bonding machine based on the stable current information.

[0078] In one implementation, the stable current information includes current data corresponding to multiple nodes when the welding head moves at a constant speed; step S210 specifically includes:

[0079] Step S211: Determine the stable output current of the motor based on the current data corresponding to the multiple nodes.

[0080] Specifically, after the motor current changes tend to stabilize when the welding head moves at a constant speed, the stable output current of the motor is determined from the stable current data (i.e., current value). In this embodiment, the median value of the current data corresponding to multiple nodes is taken as the stable output current; however, it is not limited to this, and the average value of the current data corresponding to multiple nodes can also be taken as the stable output current.

[0081] Step S212: Use the value of the stable output current as the first calibration parameter.

[0082] Specifically, the intermediate value of the stable current value determined above is taken as Y in Y=AX+B, and the corresponding current value is when the pressure is 0 grams. In other words, the value of the first calibration parameter (i.e. intercept) is equal to the intermediate value of this current value, thereby determining the first calibration parameter B.

[0083] Step S220: Determine the second calibration parameters of the wire bonding machine based on the first input pressure and the first test output pressure.

[0084] In one implementation, step S220 specifically includes:

[0085] Step S221: Obtain the initial parameters of the wire bonding machine;

[0086] Step S222: Use the product of the initial parameter and the first test output pressure as an intermediate value;

[0087] Step S223: Use the quotient of the intermediate value and the first input pressure as the second calibration parameter.

[0088] Specifically, in this embodiment, the initial parameter a of the wire bonding machine is set to 0.5, and the input pressure / output pressure = a / A. In other words, the second calibration parameter A (i.e. the calibrated slope) = a output pressure / input pressure.

[0089] Furthermore, the median value = 0.5 * the first test output pressure;

[0090] The second calibration parameter A = 0.5 * first test output pressure / first input pressure.

[0091] It is understandable that the first test output pressure is the actual output pressure measured by the pressure sensor.

[0092] Step S230: Obtain the parameter calculation formula based on the first calibration parameter and the second calibration parameter.

[0093] Based on the second calibration parameter A and the first calibration parameter B, the linear function relationship between the input pressure and the output current can be obtained, i.e., the parameter calculation formula: Y = AX + B.

[0094] Step S300: Based on the input pressure information and the parameter calculation formula, obtain the output current information corresponding to the welding head.

[0095] In one implementation, the output current information includes a first output current, and the actual output pressure information includes a first actual output pressure; step S300 specifically includes:

[0096] Step S310: Substitute the first input pressure into the parameter calculation formula to obtain the first output current corresponding to the first input pressure.

[0097] Specifically, in one embodiment, the first input pressure described above can be substituted into the obtained parameter calculation formula, that is, substituting the first input pressure into the formula yields the calibrated first output current. The first output current Y1 = A * first input pressure + B.

[0098] Step S400: Obtain the actual output pressure information of the wire bonding machine based on the output current information.

[0099] In one implementation, step S400 specifically includes:

[0100] Step S410: Obtain the first actual output pressure based on the first output current.

[0101] Specifically, the driver provides the first output current to the motor, and the pressure sensor measures the first actual pressure of the welding head.

[0102] In another implementation, the input pressure information further includes a second input pressure, and the actual output pressure information includes a second actual output pressure; step S300 further includes:

[0103] Step S320: Substitute the first input pressure into the parameter calculation formula to obtain the second output current corresponding to the first input pressure;

[0104] Step 400 further includes:

[0105] Step S340: Obtain the second actual output pressure based on the second output current.

[0106] Specifically, steps S320 and S310 are based on the same principle, and steps S420 and S410 are based on the same principle, so they will not be repeated here.

[0107] It is understandable that steps 310 and 410 exist simultaneously, as do steps 320 and 420. Either or both of these two sets of steps can be used to ensure that the input pressure and the actual output pressure are consistent.

[0108] Step S500: When the input pressure information and the actual output pressure information meet the preset requirements, the pressure calibration of the wire bonding machine is completed.

[0109] In one implementation, step S500 specifically includes:

[0110] Step S510: Obtain the allowable pressure error range of the welding head;

[0111] Step S520: The difference between the first input pressure and the first actual output pressure is taken as the actual error;

[0112] Step S530: When the actual error is within the allowable pressure error range, it is determined that the actual output pressure of the wire bonding machine after pressure calibration is accurate.

[0113] Specifically, in this embodiment, the allowable pressure error range is ±1 gram. That is to say, as long as the difference between the input pressure and the actual output pressure is within ±1 gram, the pressure calibration is completed, and the actual output pressure after pressure calibration is judged to be accurate.

[0114] In one implementation, the design current loop parameters include proportional gain; the method further includes the step of:

[0115] Step S600: When the actual output pressure information and the design output pressure information do not meet the preset requirements, the design current loop parameters of the driver are updated, and the updated design current loop parameters are used as the design current loop parameters. The process continues to obtain the stable current information of the motor based on the design current loop parameters, obtain the parameter calculation formula of the wire bonding machine based on the input pressure information, the test output pressure information, and the stable current information, obtain the output current information corresponding to the welding head based on the input pressure information and the parameter calculation formula, and obtain the actual output pressure information of the wire bonding machine based on the output current information, until the input pressure information and the actual output pressure information meet the preset requirements, and the pressure calibration of the wire bonding machine is determined to be completed.

[0116] Specifically, in step S500, if it is determined that the actual output pressure after pressure calibration is inaccurate, the design current loop parameters of the driver are readjusted, and the proportional gain (KPC) of the driver is further adjusted. Steps S100, S200, S300, and S400 are repeated until the actual output pressure after pressure calibration in S500 is accurate.

[0117] It is worth noting that the pressure calibration method of the present invention generates the intercept of the basic formula by adjusting the current loop parameters, and then substitutes the input pressure and output pressure into the formula to calculate the calibrated slope and generate the final parameter calculation formula. This method can ensure the stability and consistency of welding quality by performing precise pressure calibration on the wire bonding machine, ensuring that the input pressure and output pressure are consistent with each other, with an error within ±1 gram, thereby improving the welding accuracy and welding efficiency.

[0118] Compared to existing pressure calibration methods, which produce less accurate pressure measurements and thus make calibration more difficult, this technical solution is simple to apply and operate, and provides high-accuracy pressure calibration. This effectively improves welding quality and efficiency, reduces welding defects and the number of reprocessing operations, and lowers production costs.

[0119] It is understood that the formula Y = AX + B (X - input pressure, Y - output current, A - slope, B - intercept) of this invention is a simplified formula. Based on this, the parameter calculation formula can be further updated. For example, the updated parameter calculation formula can be expressed as: Y = AX + B + C, or Y = AX + BX + C.

[0120] like Figure 2 As shown, the pressure calibration method of the present invention will be further described below through specific embodiments:

[0121] First, detect the current changes during the upper and lower limit movements, and adjust the current loop parameters to stabilize the current changes during uniform movement. The median value of the stable current at this point corresponds to the current value when the pressure is 0 grams, which is the intercept in the formula Y = AX + B (X - input pressure, Y - output current, A - slope, B - intercept). Use a pressure sensor to measure the actual output pressure, and substitute the input and output pressures into the formula (input pressure / output pressure = a / A, where a is the slope in the default parameters and A is the calibrated slope) to calculate the slope, generating the formula Y = AX + B (X - input pressure, Y - output current, A - slope, B - intercept). After confirming the formula, input the pressure again for verification to ensure that the input pressure and the measured output pressure are consistent, with an error within ±1 gram.

[0122] Figure 3 This is a schematic diagram of the structure of a pressure calibration method system provided by the present invention. Figure 3 As shown, the pressure calibration method system of this embodiment may include:

[0123] The acquisition module 501 is used to determine the design drive information of the driver and obtain the stable current information of the motor based on the design drive information;

[0124] The calculation module 502 is used to acquire the input pressure information and test output pressure information of the welding head, and to obtain the parameter calculation formula of the wire bonding machine based on the input pressure information, the test output pressure information and the stable current information.

[0125] Substitute into module 503 to obtain the output current information corresponding to the welding head based on the input pressure information and the parameter calculation formula;

[0126] The output module 504 is used to obtain the actual output pressure information of the wire bonding machine based on the output current information;

[0127] The determination module 505 is used to complete the pressure calibration of the wire bonding machine when the input pressure information and the actual output pressure information meet preset requirements.

[0128] Figure 4 This is a schematic diagram of the hardware structure of an electronic device provided by the present invention. For example... Figure 4 As shown, the electronic device provided in this embodiment includes:

[0129] At least one processor 601 and a memory 602. The processor 601 and the memory 602 are connected via a bus 603.

[0130] In a specific implementation, at least one processor 601 executes computer execution instructions stored in the memory 602, causing at least one processor 601 to execute the pressure calibration method in the above method embodiment.

[0131] The specific implementation process of processor 601 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0132] In the above Figure 4 In the illustrated embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0133] The memory may include high-speed RAM, and may also include non-volatile storage (NVM), such as at least one disk storage.

[0134] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0135] The present invention also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the pressure calibration method of the above-described method embodiments.

[0136] The aforementioned computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0137] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0138] One embodiment of this application provides a computer program product, including a computer program that, when executed by a processor, implements the features described in this application. Figure 1 and Figure 2 The pressure calibration method provided in any of the corresponding embodiments.

[0139] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0140] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A pressure calibration method, characterized in that, The method is applied to a wire bonding machine, which includes a motor, a driver, and a bonding head; the method includes: Determine the design drive information of the driver, and obtain the stable current information of the motor based on the design drive information; The input pressure information and test output pressure information of the welding head are obtained, and the parameter calculation formula of the wire bonding machine is obtained based on the input pressure information, the test output pressure information and the stable current information. Based on the input pressure information and the parameter calculation formula, the output current information corresponding to the welding head is obtained; Based on the output current information, the actual output pressure information of the wire bonding machine is obtained; When the input pressure information and the actual output pressure information meet the preset requirements, the pressure calibration of the wire bonding machine is completed. The input pressure information includes a first input pressure, the test output pressure information includes the actual first test output pressure, and the parameter calculation formula is a linear relationship formula between input pressure and output current. The step of obtaining the parameter calculation formula for the wire bonding machine based on the input pressure information, the test output pressure information, and the stable current information includes: Based on the stable current information, the first calibration parameters of the wire bonding machine are determined; The second calibration parameters of the wire bonding machine are determined based on the first input pressure and the first test output pressure. The parameter calculation formula is obtained based on the first calibration parameter and the second calibration parameter.

2. The pressure calibration method according to claim 1, characterized in that, The stable current information includes current data corresponding to multiple nodes when the welding head moves at a constant speed. The step of determining the first calibration parameters of the wire bonding machine based on the stable current information includes: Based on the current data corresponding to the multiple nodes, the stable output current of the motor is determined; The value of the stable output current is used as the first calibration parameter.

3. The pressure calibration method according to claim 1, characterized in that, The step of determining the second calibration parameters of the wire bonding machine based on the first input pressure and the first test output pressure includes: Obtain the initial parameters of the wire bonding machine; The product of the initial parameter and the first test output pressure is used as an intermediate value; The quotient of the intermediate value and the first input pressure is used as the second calibration parameter.

4. The pressure calibration method according to claim 1, characterized in that, The output current information includes a first output current, and the actual output pressure information includes a first actual output pressure. The step of obtaining the output current information corresponding to the welding head based on the input pressure information and the parameter calculation formula includes: Substitute the first input pressure into the parameter calculation formula to obtain the first output current corresponding to the first input pressure; Determining the actual output pressure information of the wire bonding machine based on the output current information includes: The first actual output pressure is obtained based on the first output current.

5. The pressure calibration method according to claim 4, characterized in that, When the input pressure information and the actual output pressure information meet preset requirements, the pressure calibration of the wire bonding machine is completed, including: Obtain the allowable pressure error range of the welding head; The difference between the first input pressure and the first actual output pressure is taken as the actual error; When the actual error is within the allowable pressure error range, the actual output pressure of the wire bonding machine after pressure calibration is determined to be accurate.

6. The pressure calibration method according to claim 1, characterized in that, The design driving information is the design current loop parameters; the method further includes: When the actual output pressure information and the input pressure information do not meet the preset requirements, the design current loop parameters of the driver are updated, and the updated design current loop parameters are used as the design current loop parameters. The process continues to execute the following steps: obtaining the stable current information of the motor based on the design current loop parameters; obtaining the parameter calculation formula of the wire bonding machine based on the input pressure information, the test output pressure information, and the stable current information; obtaining the output current information corresponding to the welding head based on the input pressure information and the parameter calculation formula; obtaining the actual output pressure information of the wire bonding machine based on the output current information; until the input pressure information and the actual output pressure information meet the preset requirements, the pressure calibration of the wire bonding machine is determined to be complete.

7. A pressure calibration system, characterized in that, The pressure calibration system is used to implement the pressure calibration method according to any one of claims 1-6, and the pressure calibration system comprises: The determination module is used to determine the design drive information of the driver and obtain the stable current information of the motor based on the design drive information; The calculation module is used to obtain the input pressure information and test output pressure information of the welding head, and to obtain the parameter calculation formula of the wire bonding machine based on the input pressure information, the test output pressure information and the stable current information. The input module is used to obtain the output current information corresponding to the welding head based on the input pressure information and the parameter calculation formula; The output module is used to obtain the actual output pressure information of the wire bonding machine based on the output current information; The determination module is used to complete the pressure calibration of the wire bonding machine when the input pressure information and the actual output pressure information meet the preset requirements.

8. An electronic device, characterized in that, include: At least one processor, and at least one memory communicatively connected to the processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory to implement the method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1 to 6.

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