Detection method and device, equipment and storage medium

Abstract

The invention discloses a detection method, device and equipment and a storage medium. The method comprises the steps that a current change signal on a power supply circuit of ultrasonic welding equipment is detected; and according to the current change signal, the working state of the ultrasonic welding equipment is determined, and the working state is one of a normal pressing state and an abnormal state. According to the embodiment of the invention, the working state representing the welding effect of the equipment is determined by directly detecting the current change signal on the power supply loop of the ultrasonic welding equipment, so that the detection accuracy is improved, and the production cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of ultrasonic welding, and in particular to a detection method, device, equipment and storage medium. Background Art

[0002] In the application of ultrasonic welding technology, in order to ensure the welding quality, there are currently a variety of welding status detection methods, but these methods all have certain limitations and shortcomings.

[0003] First, a common detection scheme is to monitor the actual welding parameters (such as pressing time, amplitude, etc.) at the welding head end through the welding detection function of the ultrasonic welding equipment, and judge whether these parameters are within the preset range to evaluate whether the welding is normal. However, this method is highly dependent on intermediate devices such as relays to transmit and process detection signals. Once these devices are interfered with or damaged, it may cause signal distortion and misjudgment, and even allow unwelded products to enter the market. In addition, some ultrasonic equipment on the market does not have this detection function itself, which further increases the quality risk in the production process.

[0004] Another solution is to evaluate the welding effect by detecting the displacement distance of the ultrasonic probe. Although this method is intuitive, it is extremely difficult to control in situations where the welding size requirements are strict and the displacement threshold is narrow, and it is easy to cause high-frequency false alarms, affecting production efficiency.

[0005] Another option is to inspect the product after ultrasonic welding is completed, which can be visual inspection or other technical means. Although this method can accurately reflect the welding quality, the disadvantage of this solution is that the time to discover the problem will be delayed, and production cannot be adjusted in time, resulting in an expansion of the scope of abnormality. On the other hand, it increases additional testing costs.

[0006] In summary, the current ultrasonic welding detection schemes all have their own limitations and challenges, and there is an urgent need for a more direct, accurate and reliable detection method to improve the quality and efficiency of ultrasonic welding. Summary of the invention

[0007] The embodiments of the present application provide a detection method, apparatus, device and storage medium, which determine the working state characterizing the welding effect of the equipment by directly detecting the current change signal on the power supply circuit of the ultrasonic welding equipment, thereby improving the detection accuracy and reducing the production cost.

[0008] On the one hand, an embodiment of the present application provides a detection method, the method comprising:

[0009] Detect the current change signal on the power supply circuit of the ultrasonic welding equipment;

[0010] The working state of the ultrasonic welding device is determined according to the current change signal, and the working state is one of a normal pressing state and an abnormal state.

[0011] On the other hand, an embodiment of the present application provides a detection device, the device comprising:

[0012] A detection unit, used to detect a current change signal on a power supply circuit of an ultrasonic welding device;

[0013] The determination unit is used to determine the working state of the ultrasonic welding device according to the current change signal, and the working state is one of a normal pressing state and an abnormal state.

[0014] On the other hand, an embodiment of the present application provides a computer device, which includes a processor and a memory, wherein a computer program is stored in the memory, and the processor is used to execute the detection method described in any of the above embodiments by calling the computer program stored in the memory.

[0015] On the other hand, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program is suitable for being loaded by a processor to execute the detection method described in any of the above embodiments.

[0016] The embodiment of the present application detects the current change signal on the power supply circuit of the ultrasonic welding device; according to the current change signal, the working state of the ultrasonic welding device is determined, and the working state is one of a normal pressing state and an abnormal state. The embodiment of the present application directly detects the current change signal on the power supply circuit of the ultrasonic welding device to determine the working state that characterizes the welding effect of the device, thereby improving the detection accuracy and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the process of the detection method provided in the embodiment of the present application.

[0019] Figure 2 A circuit diagram of a detection circuit provided in an embodiment of the present application.

[0020] Figure 3 A schematic diagram of the structure of a current transformer provided in an embodiment of the present application.

[0021] Figure 4 This is a current waveform diagram corresponding to the standby state provided in an embodiment of the present application.

[0022] Figure 5 This is a current waveform diagram corresponding to the air pressure state provided in the embodiment of the present application.

[0023] Figure 6 This is a current waveform diagram corresponding to the normal pressing state provided in the embodiment of the present application.

[0024] Figure 7 This is a standard pressing waveform diagram corresponding to the normal pressing state provided in the embodiment of the present application.

[0025] Figure 8 A schematic diagram of the structure of a detection device provided in an embodiment of the present application.

[0026] Fig. 9 A schematic diagram of the structure of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0028] The embodiments of the present application provide a detection method, apparatus, device and storage medium. Specifically, the detection method of the embodiments of the present application can be performed by a computer device, wherein the computer device can be a terminal or a server or other device. The terminal can be a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart TV, a smart speaker, a wearable smart device, a smart car terminal or other devices, and the terminal can also include a client, which can be a financial client, a browser client or an instant messaging client, etc. The server can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content distribution network services, and basic cloud computing services such as big data and artificial intelligence platforms, but is not limited to this.

[0029] It should be noted that the order of description of the following embodiments is not intended to limit the priority order of the embodiments.

[0030] See also Figure 1 Figure 1A flow chart of the detection method provided in the embodiment of the present application. The method comprises the following steps:

[0031] Step 110, detecting a current change signal on a power supply circuit of an ultrasonic welding device;

[0032] Step 120: determining the working state of the ultrasonic welding device according to the current change signal, wherein the working state is one of a normal pressing state and an abnormal state.

[0033] By studying the current change model of the main power supply circuit of the ultrasonic welding equipment under different working conditions, the embodiment of the present application can design a detection circuit in a targeted manner. The current change signal on the power supply circuit of the ultrasonic welding equipment can be directly detected by the detection circuit, which can effectively avoid the influence of intermediate devices.

[0034] In some embodiments, the detecting the power supply current change information on the power supply circuit of the ultrasonic welding device includes: detecting the current change signal on the power supply line of the power supply circuit of the ultrasonic welding device through a current transformer in the detection circuit;

[0035] Determining the working state of the ultrasonic welding device according to the current change signal includes: performing signal processing on the current change signal through the detection circuit to obtain a target voltage; comparing the target voltage with a reference voltage; if the voltage comparison result is that the target voltage is greater than the reference voltage, determining that the working state of the ultrasonic welding device is a normal pressing state; or if the voltage comparison result is that the target voltage is less than or equal to the reference voltage, determining that the working state of the ultrasonic welding device is an abnormal state.

[0036] like Figure 2 As shown, one of the key components in the detection circuit 100 is a current transformer 10. The current transformer 10 is designed to detect the current change signal on the power supply line 20 (usually any one of the live wire or the neutral wire) of the power supply circuit of the ultrasonic welding equipment. For example, the power supply line 20 (any one of the live wire or the neutral wire) of the ultrasonic equipment passes through the induction coil of the current transformer 10. When the power supply line is energized, the current transformer 10 can sense the magnitude and change of the current on the power supply line 20, and then obtain the current change signal. For example, the current transformer 10 can be as follows Figure 3 The device shown.

[0037] like Figure 2As shown, the current change signal obtained from the current transformer 10 is converted into a voltage signal (i.e., a target voltage) that can be used for voltage comparison after signal processing by the detection circuit 100. Then, the target voltage is compared with a preset reference voltage. Among them, the reference voltage is obtained based on the research on the current characteristics of the power supply circuit of the ultrasonic welding equipment under the normal pressing state, and is used as a reference for judging the working state.

[0038] According to the voltage comparison result, the detection circuit 100 can automatically determine the working state of the ultrasonic welding device. If the voltage comparison result is that the target voltage is greater than the reference voltage, the working state of the ultrasonic welding device is determined to be a normal pressing state; or if the voltage comparison result is that the target voltage is less than or equal to the reference voltage, the working state of the ultrasonic welding device is determined to be an abnormal state, such as poor pressing, mechanical failure or power supply abnormality.

[0039] The embodiment of the present application directly monitors the current change signal on the power supply circuit of the ultrasonic welding equipment, avoiding the interference and errors that may be caused by intermediate devices, and improving the accuracy and reliability of detection. The detection circuit can provide real-time feedback on the working status of the equipment, provide operators with timely fault warnings and maintenance guidance, and help improve production efficiency and equipment safety. The design of the detection circuit has strong flexibility and scalability, and can be adjusted and optimized according to ultrasonic welding equipment of different models and specifications to meet application requirements in different scenarios.

[0040] In some embodiments, the detection circuit further includes a rectifier bridge stack, a first resistor, a second resistor, a first capacitor and a second capacitor, the input end of the rectifier bridge stack is connected to the current transformer, the positive output end of the rectifier bridge stack is respectively connected to the first end of the first resistor, the first end of the first capacitor, and the first end of the second resistor, the negative output end of the rectifier bridge stack is respectively connected to the second end of the first resistor, the second end of the first capacitor, the second end of the second capacitor, and the ground end, and the first end of the second capacitor is connected to the second end of the second resistor;

[0041] The signal processing of the current change signal by the detection circuit to obtain the target voltage includes: rectifying the current change signal by the rectifier bridge stack to convert the current change signal into a DC current signal; sampling the DC current signal by the first resistor to obtain a pulse voltage signal; filtering the pulse voltage signal by the first capacitor to obtain a filtered pulse voltage signal; integrating the filtered pulse voltage signal by the second capacitor to obtain the target voltage, wherein the second resistor is used to limit the charging current of the second capacitor.

[0042] like Figure 2As shown, the detection circuit 100 further includes a rectifier bridge D1 , a first resistor R1 , a second resistor R2 , a first capacitor C1 , and a second capacitor C2 .

[0043] Among them, the input end of the rectifier bridge stack D1 is directly connected to the current transformer 10, and is used to convert the current change signal (usually an AC signal) output by the current transformer 10 into a DC current signal. The positive output end of the rectifier bridge stack D1 is connected to the positive poles of multiple components, and the negative output end is connected to the negative poles of these components and the ground terminal GND. For example, the positive output end of the rectifier bridge stack D1 is respectively connected to the first end of the first resistor R1, the first end of the first capacitor C1, and the first end of the second resistor R2, and the negative output end of the rectifier bridge stack D1 is respectively connected to the second end of the first resistor R1, the second end of the first capacitor C1, the second end of the second capacitor C2, and the ground terminal GND.

[0044] The first resistor R1 is connected after the positive output terminal of the rectifier bridge D1, and is used to sample the rectified DC current signal, and generate a pulse voltage signal through the voltage division of the first resistor R1. The pulse voltage signal can be used to reflect the magnitude of the DC current. For example, the resistance value of the first resistor R1 can be 10KΩ.

[0045] The first capacitor C1 is connected in parallel to the first resistor R1, and its main function is to filter the pulse voltage signal, eliminate high-frequency noise and interference, and make the signal smoother and more stable. For example, the capacitance value of the first capacitor C1 can be 0.1uF.

[0046] Among them, the second resistor R2 and the second capacitor C2 form a simple RC integration circuit. For example, the resistance value of the second resistor R2 can be 510Ω, and the capacitance value of the second capacitor C2 can be 20uF. The second resistor R2 is connected before the second capacitor C2 to limit the charging current of the second capacitor C2 to prevent damage caused by excessive current. The second capacitor C2 integrates the filtered pulse voltage signal. As the wave welding time of the equipment accumulates, the voltage on the second capacitor C2 gradually increases, and finally reaches a balance to obtain a stable target voltage. This target voltage can more accurately reflect the characteristics of the original current change signal.

[0047] The detection circuit 100 processes the current change signal to obtain the target voltage. This processing may include rectification, sampling, filtering, integration and other steps to ensure the accuracy and stability of the signal. The entire signal processing process includes the following steps:

[0048] Rectification: The current change signal (AC signal) is rectified by the rectifier bridge stack D1 to convert the current change signal into a DC current signal to provide DC power for subsequent processing.

[0049] Sampling: The rectified DC current signal is sampled through the first resistor R1, and a pulse voltage signal is generated through the resistor voltage division effect. The pulse voltage signal carries the magnitude information of the DC current.

[0050] Filtering: The pulse voltage signal is filtered through the first capacitor C1 to obtain a filtered pulse voltage signal. High-frequency noise and interference are eliminated through filtering to make the signal smoother and more stable.

[0051] Integration: The filtered pulse voltage signal is integrated through the second capacitor C2. As the wave welding time of the equipment accumulates, the voltage on the second capacitor C2 gradually increases and tends to stabilize, and finally the target voltage is obtained. In this process, the second resistor R2 plays a role in limiting the charging current, protecting the safe operation of the capacitor and the entire circuit. Among them, the signal after preliminary rectification, sampling, and filtering is an intermittent pulse voltage signal, which is then gradually absorbed and stored by the large-capacity second capacitor C2. As the accumulated energy of the second capacitor C2 increases, the voltage value on the second capacitor C2 body also gradually rises until it reaches a stable state that is balanced with the energy consumption of the subsequent circuit. This process is essentially the integration and accumulation of the pulse voltage signal, thereby achieving signal smoothing and energy accumulation.

[0052] In some embodiments, the detection circuit further includes a third resistor, a fourth resistor, a fifth resistor, a comparator and a reference voltage source, wherein the first end of the third resistor is respectively connected to the second end of the second resistor, the first end of the second capacitor, and the positive input end of the comparator, the second end of the third resistor is respectively connected to the second end of the second capacitor, the first end of the reference voltage source, and the second fixed end of the fifth resistor, the first end of the fourth resistor is connected to a power supply, the second end of the fourth resistor is connected to the first fixed end of the fifth resistor, the second end of the reference voltage source is connected to the adjustable end of the fifth resistor, and the third end of the reference voltage source is connected to the first fixed pin of the fifth resistor and the negative input end of the comparator, wherein the third resistor is used to filter out interference signals on the positive input end of the comparator;

[0053] The voltage comparison of the target voltage with the reference voltage includes: obtaining the reference voltage through a voltage stabilizing circuit composed of the fourth resistor, the fifth resistor and the reference voltage stabilizing source; comparing the target voltage with the reference voltage through the comparator, and outputting a level corresponding to the voltage comparison result through the output end of the comparator; wherein, if the voltage comparison result is that the target voltage is greater than the reference voltage, the output end of the comparator outputs a high level, and it is determined that the working state of the ultrasonic welding equipment is a normal pressing state; or, if the voltage comparison result is that the target voltage is less than or equal to the reference voltage, the output end of the comparator outputs a low level, and it is determined that the working state of the ultrasonic welding equipment is an abnormal state.

[0054] like Figure 2 As shown, the detection circuit 100 also includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, a comparator U1 and a reference voltage source U2, the first end of the third resistor R3 is respectively connected to the second end of the second resistor R2, the first end of the second capacitor C2, and the positive input end of the comparator U1, the second end of the third resistor R3 is respectively connected to the second end of the second capacitor C2, the first end of the reference voltage source U2, and the second fixed end of the fifth resistor R5, the first end of the fourth resistor R4 is connected to the power supply, the second end of the fourth resistor R4 is connected to the first fixed end of the fifth resistor R5, the second end of the reference voltage source U2 is connected to the adjustable end of the fifth resistor R5, the third end of the reference voltage source U2 is connected to the first fixed pin of the fifth resistor R5 and the negative input end of the comparator U1, wherein the third resistor R3 is used to filter out interference signals on the positive input end of the comparator U1.

[0055] The third resistor R3 is connected between the common node of the second resistor R2 and the second capacitor C2 and the positive input terminal of the comparator U1. The main function of the third resistor R3 is to filter out any interference signal on the positive input terminal of the comparator U1 to ensure that the voltage signal input to the comparator U1 is pure and stable. For example, the resistance value of the third resistor R3 can be 10KΩ.

[0056] Among them, the fourth resistor R4 and the fifth resistor R5, these two resistors and the reference voltage regulator U2 together form a voltage regulator circuit. One end of the fourth resistor R4 is connected to the power supply VCC, and the other end is connected to the first fixed end of the fifth resistor R5. The second fixed end of the fifth resistor R5 is connected to the third resistor R3 and the first end of the reference voltage regulator U2 to form a voltage dividing point of the reference voltage. The second end (usually the adjustment end) of the reference voltage regulator U2 is connected to the adjustable end of the fifth resistor R5, which is used to adjust the specific value of the output reference voltage. The third end of the reference voltage regulator U2 is connected to the first fixed pin of the fifth resistor R5 and the negative input end of the comparator U1, as the reference voltage input of the comparator U1. For example, the resistance value of the fourth resistor R4 can be 510Ω.

[0057] For example, in view of the differences in the shell welding parameters of different products, the reference voltage needs to be flexibly adjusted to match the actual needs. In this circuit, the fifth resistor R5 is designed as an adjustable resistor. By finely adjusting its resistance, the reference voltage value can be accurately regulated. A common practice is to measure the actual voltage at the positive input terminal (i.e., pin 3) of the comparator U1 in the normal pressing state, and use 80% of this voltage value as the reference voltage setting benchmark, and achieve this target value by adjusting the resistance value of R5, thereby ensuring the stability and accuracy of the circuit.

[0058] For example, an oscilloscope can be used to measure the current change signal on the power supply circuit of the ultrasonic welding equipment under various working conditions, such as Figure 4 The current waveform corresponding to the standby state shown in FIG. Figure 5 The current waveform corresponding to the air pressure state shown in Figure 6 From the current waveform diagram corresponding to the normal pressing state shown in the figure, it can be clearly seen that the energy fluctuation on the main power supply circuit of the ultrasonic welding equipment will change significantly as the equipment is in different working states. Based on this, a detection circuit 100 can be designed to sample the current change signal of the power supply circuit of the ultrasonic welding equipment, and different voltage values ​​can be sampled according to the changes in the current change signal of the ultrasonic welding equipment in different working states. The reference voltage is set according to the different sampled voltage values, thereby realizing the corresponding logic judgment and control functions.

[0059] The reference voltage regulator U2 is a component that can provide a stable voltage output, and its output voltage is controlled by the internal circuit and the external adjustment terminal. In the detection circuit 100, the reference voltage regulator U2 is used to generate an accurate reference voltage for comparison by the comparator U1.

[0060] Among them, the comparator U1 is a component that can compare two input voltages and output the comparison result. Its positive input terminal (pin 3) receives the target voltage from the third resistor R3, and its negative input terminal (pin 2) receives the reference voltage from the reference voltage source U2. According to the magnitude relationship between the two input voltages, the comparator U1 will output corresponding high and low level signals.

[0061] For example, the process of performing a voltage comparison may include the following steps:

[0062] Obtaining a reference voltage: Obtaining a reference voltage through a voltage stabilizing circuit composed of a fourth resistor R4, a fifth resistor R5 and a reference voltage stabilizing source U1. This reference voltage is a reference for subsequent voltage comparison operations.

[0063] Voltage comparison: The target voltage (voltage signal after rectification, sampling, filtering, integration, etc.) is compared with the reference voltage through the comparator U1, and the comparator U1 outputs a corresponding level signal according to the size relationship between the two voltages.

[0064] Output result judgment: If the voltage comparison result is that the target voltage is greater than the reference voltage, the output end of the comparator U1 outputs a high level, indicating that the working state of the ultrasonic welding equipment is a normal pressing state. If the voltage comparison result is that the target voltage is less than or equal to the reference voltage, the output end of the comparator U1 outputs a low level, indicating that the working state of the ultrasonic welding equipment is an abnormal state.

[0065] In some embodiments, the detection circuit also includes a drive switch, a relay and a signal light, the first end of the drive switch is connected to the output end of the comparator, the second end of the drive switch is connected to the negative power supply pole of the relay, the third end of the drive switch is connected to the ground end of the relay, and the signal light is connected to the relay; the method also includes: if it is determined that the working state of the ultrasonic welding equipment is a normal pressing state, then the drive switch is turned on according to the high level to control the relay to be attracted and light up the signal light.

[0066] like Figure 2 As shown, the detection circuit 100 also includes a driving switch Q1, a relay RL1 and a signal light LED1. The first end of the driving switch Q1 is connected to the output end (pin 1) of the comparator U1, the second end of the driving switch Q1 is connected to the negative power supply electrode of the relay RL1, the third end of the driving switch Q1 is connected to the ground end of the comparator U1, and the signal light is connected to the relay RL1.

[0067] The driving switch Q1 is usually a MOS tube, which is used to control the on and off of the relay RL1 according to the control signal (high level or low level). Its first end is connected to the output end (pin 1) of the comparator U1 to receive the control signal; the second end is connected to the negative power supply electrode of the relay RL1, and the on and off of the relay RL1 is realized by controlling this end; the third end is connected to the ground end of the comparator U1 to form a control loop.

[0068] Among them, the relay RL1 has two sets of switches. The first set of switches is used to control the on and off of the indicator light LED1, and the second set of switches is used to provide an external interface (such as PLC+, PLC-) for realizing communication and control with external devices.

[0069] Among them, the signal light LED1 is used to indicate the working status of the ultrasonic welding equipment. When the relay RL1 is energized, LED1 is lit, indicating that the pressing is successful.

[0070] like Figure 2As shown, the detection circuit 100 may further include a diode D2, which is disposed between the second end of the driving switch Q1 and the positive power supply electrode of the relay RL1. The diode D2 is used to provide freewheeling current to the relay RL1 and to protect the driving switch Q1. The diode D2 serves as a freewheeling diode to protect the driving switch Q1 from reverse current shock when the relay RL1 is disconnected.

[0071] like Figure 2 As shown, the detection circuit 100 may further include a Zener diode D3, which is disposed between the first end of the driving switch Q1 and the third end of the driving switch Q1, and is used to limit the voltage across the driving switch Q1 (MOS tube) to prevent the MOS tube from being damaged by excessive voltage.

[0072] like Figure 2 As shown, the detection circuit 100 may further include a seventh resistor R7, one end of which is connected to a power supply, and the other end is connected to one end of the first set of switches of the control relay RL1, and the other end of the first set of switches is connected to the indicator light LED1. The seventh resistor R7 is used for current limiting, so as to provide a stable current to the indicator light LED1 when the first set of switches of the relay RL1 is closed, so as to ensure that the indicator light LED1 is illuminated within a normal working range, and at the same time prevent the indicator light LED1 or the relay RL1 from being damaged by excessive current. For example, the resistance value of the seventh resistor R7 may be 1KΩ.

[0073] If it is determined that the working state of the ultrasonic welding equipment is the normal pressing state, the switch Q1 is turned on according to the high level to control the relay RL1 to be attracted and light the signal light LED1.

[0074] For example, the ultrasonic welding equipment works intermittently. Only when the ultrasonic probe is pressed down to generate waves, a large energy fluctuation will be generated in its power supply circuit. At this time, the current transformer 10 can also sense a stronger energy pulse to charge the second capacitor C2. After the second capacitor C2 is charged, the voltage across the two ends of the second capacitor C2 increases. When the target voltage accumulated by the second capacitor C2 is higher than the reference voltage on the negative input end (pin 2) of the comparator U1 chip, the output end (pin 1) of the comparator U1 outputs a high level to turn on the drive switch Q1, and control the relay RL1 to power on. When the ultrasonic welding is completed, the probe stops emitting waves and rises. At this time, the ultrasonic welding equipment is in standby mode, and the energy in its power supply circuit decreases rapidly. The energy sensed by the current transformer 10 also decreases synchronously. Similarly, the energy of the second capacitor C2 is reduced, and the voltage across the two ends of the second capacitor C2 drops. After it is lower than the reference voltage, the output end (pin 1) of the comparator U1 outputs a low level, driving the switch Q1 to turn on and off, disconnecting the power supply circuit of the relay RL1, and resetting its state.

[0075] For example, two groups of signals are connected to the two sets of switches inside the relay RL1. The first set of switches is connected to the indicator LED1. When the relay RL1 is powered and energized, the indicator LED1 will be lit. The second set of switches is an external interface for external output (such as external PLC+, PLC-). This external interface can be used for external expansion, which is convenient for automatic control, such as external PLC or other control modules. When the output end (pin 1) of the comparator U1 outputs a low level, the state of the relay RL1 will not change, and the indicator LED1 and the external interface will not be triggered. At this time, the operator or the automation equipment cannot detect the signal of successful pressing, and it can be determined that the product is leaking pressure.

[0076] If the working state of the ultrasonic welding equipment is determined to be abnormal, the indicator LED1 will not be lit to remind the operator of the abnormal pressing, and the external interface will not be connected. External expansion equipment can use this as a signal model logic judgment.

[0077] The detection circuit 100 of the embodiment of the present application has a simple structure and low cost, and is easy to promote.

[0078] The embodiments of the present application can effectively avoid interference from various intermediate sensors or relays of the device itself, directly check the energy change (current change signal) of the ultrasonic welding equipment, and judge the working status of the equipment from the energy change.

[0079] In some embodiments, the detection circuit also includes a voltage divider circuit, which is connected to the output end of the comparator. The voltage divider circuit is used to divide the output voltage of the comparator, and the divided output voltage is used to turn on the drive switch.

[0080] like Figure 2 As shown, the detection circuit 100 also includes a voltage divider circuit, wherein the sixth resistor R6 and the eighth resistor R8 constitute a voltage divider circuit, and the voltage divider circuit is used to divide the voltage output from the output end (pin 1) of the comparator U1 to an appropriate voltage value, and the divided output voltage is used to turn on the drive switch Q1. For example, the resistance value of the sixth resistor R6 can be 10KΩ, and the resistance value of the eighth resistor R8 can be 10KΩ.

[0081] like Figure 2 As shown, in the detection circuit 100, in order to ensure that the output voltage (pin 1) of the comparator U1 can safely and effectively drive the drive switch Q1 (usually a MOS tube), a voltage divider circuit is designed in the circuit, which is composed of a sixth resistor R6 and an eighth resistor R8.

[0082] One end of the eighth resistor R8 is connected to the output end (pin 1) of the comparator U1, and the other end is connected to one end of the eighth resistor R8, forming the upper half of the voltage divider circuit.

[0083] One end of the sixth resistor R6 is connected to the eighth resistor R8, and the other end is connected to the ground terminal GND, forming the lower half of the voltage divider circuit.

[0084] For example, when the output terminal (pin 1) of the comparator U1 outputs a high level, the high level voltage will be divided by the sixth resistor R6 and the eighth resistor R8. Due to the series voltage-dividing characteristics of the resistors, the voltage after the voltage division will be lower than the original high level voltage, but the specific value depends on the resistance ratio of R6 and R8.

[0085] The divided voltage is sent to the first end of the driving switch Q1 to control the conduction state of the driving switch Q1. Since switching elements such as MOS tubes usually require a suitable voltage range to ensure reliable conduction or cutoff, the function of the voltage divider circuit is to adjust the voltage output by the comparator U1 to this suitable range.

[0086] The voltage applied to the control terminal of the drive switch Q1 can be limited by the voltage divider circuit to prevent damage to Q1 due to excessive voltage. Appropriate drive voltage helps the drive switch Q1 to work more stably and improve the reliability and stability of the circuit. By adjusting the resistance values ​​of R6 and R8, the voltage divider ratio can be flexibly changed to meet the requirements of different circuits for drive voltage.

[0087] The voltage divider circuit in the detection circuit 100 ensures that the output voltage of the comparator U1 can safely and effectively drive the drive switch Q1, thereby achieving control of the relay RL1 and the signal light LED1.

[0088] In some embodiments, the detecting the power supply current change information on the power supply circuit of the ultrasonic welding device includes: detecting the current change signal on the power supply line of the power supply circuit of the ultrasonic welding device through an oscilloscope;

[0089] Determining the working state of the ultrasonic welding device according to the current change signal includes: plotting the waveform of the power supply circuit change signal through the oscilloscope to obtain a target waveform diagram corresponding to the power supply circuit change signal; performing a graphical comparison between the target waveform diagram and a pressing standard waveform diagram corresponding to the normal pressing state; if the image comparison result is the same or similar, determining that the working state of the ultrasonic welding device is a normal pressing state; or if the image comparison result is not similar, determining that the working state of the ultrasonic welding device is an abnormal state.

[0090] For example, an oscilloscope is connected to the power supply line of the power supply circuit of the ultrasonic welding equipment to capture the current change signal in real time. The high precision and high-speed sampling capability of the oscilloscope can accurately record the change of current over time.

[0091] Then, the captured current change signal is plotted by an oscilloscope to generate a target waveform corresponding to the power supply circuit change signal. This waveform can intuitively show the dynamic change of current in the power supply circuit.

[0092] Then, the drawn target waveform is compared with the pre-set standard pressing waveform corresponding to the normal pressing state. This comparison is usually based on image processing technology, and is performed by calculating the similarity or difference between the two waveforms. For example, the standard pressing waveform can be Figure 7 The waveform shown.

[0093] If the target waveform and the pressing standard waveform show a high degree of similarity or match in the image comparison, it can be determined that the ultrasonic welding equipment is currently in a normal pressing state. This means that the power supply current change of the equipment is in line with expectations and the pressing process is proceeding normally.

[0094] If the target waveform and the lamination standard waveform show significant differences or mismatches in the image comparison, it can be determined that the ultrasonic welding equipment is currently in an abnormal state. This may indicate that the equipment is faulty, poor lamination or other problems, which require further inspection and repair.

[0095] Directly testing the target waveform on the power supply circuit avoids the interference and error that may be introduced by the components on the homemade circuit board, and improves the accuracy of judgment. By comparing the waveforms, the current changes can be observed intuitively, which is convenient for technicians to perform fault analysis and diagnosis.

[0096] As a high-precision test equipment, the purchase and maintenance cost of the oscilloscope is relatively high and may not be suitable for all application scenarios. Using an oscilloscope and image processing technology requires certain professional knowledge and skills, and has high requirements for operators.

[0097] In summary, although the investment cost is relatively high, the method of detecting the power supply current change signal of the ultrasonic welding equipment through an oscilloscope and combining it with the waveform comparison method has high accuracy and intuitiveness in judging the working status of the ultrasonic welding equipment, and is suitable for occasions with high requirements for detection accuracy.

[0098] All of the above technical solutions can be arbitrarily combined to form optional embodiments of the present application, which will not be described in detail here.

[0099] The embodiment of the present application detects the current change signal on the power supply circuit of the ultrasonic welding device; according to the current change signal, the working state of the ultrasonic welding device is determined, and the working state is one of a normal pressing state and an abnormal state. The embodiment of the present application directly detects the current change signal on the power supply circuit of the ultrasonic welding device to determine the working state that characterizes the welding effect of the device, thereby improving the detection accuracy and reducing the production cost.

[0100] In order to better implement the detection method of the present application embodiment, the present application embodiment also provides a detection device. Figure 8 , Figure 8 A schematic diagram of the structure of a detection device provided in an embodiment of the present application. The detection device 200 may include:

[0101] A detection unit 210, used to detect a current change signal on a power supply circuit of an ultrasonic welding device;

[0102] The determination unit 220 is used to determine the working state of the ultrasonic welding device according to the current change signal, and the working state is one of a normal pressing state and an abnormal state.

[0103] In some embodiments, the detection unit 210 may be used to: detect a current change signal on a power supply line of a power supply circuit of an ultrasonic welding device through a current transformer in the detection circuit;

[0104] The determining unit 220 may be used to:

[0105] Processing the current change signal by the detection circuit to obtain a target voltage;

[0106] Comparing the target voltage with a reference voltage;

[0107] If the voltage comparison result is that the target voltage is greater than the reference voltage, it is determined that the working state of the ultrasonic welding device is a normal pressing state; or

[0108] If the voltage comparison result is that the target voltage is less than or equal to the reference voltage, it is determined that the working state of the ultrasonic welding device is an abnormal state.

[0109] In some embodiments, the detection circuit further includes a rectifier bridge stack, a first resistor, a second resistor, a first capacitor and a second capacitor, the input end of the rectifier bridge stack is connected to the current transformer, the positive output end of the rectifier bridge stack is respectively connected to the first end of the first resistor, the first end of the first capacitor, and the first end of the second resistor, the negative output end of the rectifier bridge stack is respectively connected to the second end of the first resistor, the second end of the first capacitor, the second end of the second capacitor, and the ground end, and the first end of the second capacitor is connected to the second end of the second resistor;

[0110] When the determination unit 220 processes the current change signal through the detection circuit to obtain the target voltage, it can be used to: rectify the current change signal through the rectifier bridge stack to convert the current change signal into a DC current signal; sample the DC current signal through the first resistor to obtain a pulse voltage signal; filter the pulse voltage signal through the first capacitor to obtain a filtered pulse voltage signal; integrate the filtered pulse voltage signal through the second capacitor to obtain the target voltage, wherein the second resistor is used to limit the charging current of the second capacitor.

[0111] In some embodiments, the detection circuit further includes a third resistor, a fourth resistor, a fifth resistor, a comparator and a reference voltage source, wherein the first end of the third resistor is respectively connected to the second end of the second resistor, the first end of the second capacitor, and the positive input end of the comparator, the second end of the third resistor is respectively connected to the second end of the second capacitor, the first end of the reference voltage source, and the second fixed end of the fifth resistor, the first end of the fourth resistor is connected to a power supply, the second end of the fourth resistor is connected to the first fixed end of the fifth resistor, the second end of the reference voltage source is connected to the adjustable end of the fifth resistor, and the third end of the reference voltage source is connected to the first fixed pin of the fifth resistor and the negative input end of the comparator, wherein the third resistor is used to filter out interference signals on the positive input end of the comparator;

[0112] When the determination unit 220 performs voltage comparison on the target voltage and the reference voltage, it can be used to: obtain the reference voltage through the voltage stabilization circuit formed by the fourth resistor, the fifth resistor and the reference voltage stabilization source; perform voltage comparison on the target voltage and the reference voltage through the comparator, and output the voltage level corresponding to the voltage comparison result through the output terminal of the comparator;

[0113] Among them, if the voltage comparison result is that the target voltage is greater than the reference voltage, the output end of the comparator outputs a high level, and it is determined that the working state of the ultrasonic welding equipment is a normal pressing state; or, if the voltage comparison result is that the target voltage is less than or equal to the reference voltage, the output end of the comparator outputs a low level, and it is determined that the working state of the ultrasonic welding equipment is an abnormal state.

[0114] In some embodiments, the detection circuit further includes a drive switch, a relay and a signal light, wherein the first end of the drive switch is connected to the output end of the comparator, the second end of the drive switch is connected to the negative power supply electrode of the relay, the third end of the drive switch is connected to the ground end of the comparator, and the signal light is connected to the relay;

[0115] The detection device 200 may further include:

[0116] The control unit is used for, if it is determined that the working state of the ultrasonic welding equipment is a normal pressing state, turning on the driving switch according to the high level to control the relay to be attracted and lighting the signal light.

[0117] In some embodiments, the detection circuit also includes a voltage divider circuit, which is connected to the output end of the comparator. The voltage divider circuit is used to divide the output voltage of the comparator, and the divided output voltage is used to turn on the drive switch.

[0118] In some embodiments, the detection unit 210 may be used to: detect a current change signal on a power supply line of a power supply circuit of an ultrasonic welding device through an oscilloscope;

[0119] The determination unit 220 can be used to: draw the waveform of the power supply circuit change signal through the oscilloscope to obtain a target waveform diagram corresponding to the power supply circuit change signal; compare the target waveform diagram with the pressing standard waveform diagram corresponding to the normal pressing state; if the image comparison result is the same or similar, determine that the working state of the ultrasonic welding device is a normal pressing state; or if the image comparison result is not similar, determine that the working state of the ultrasonic welding device is an abnormal state.

[0120] All of the above technical solutions can be arbitrarily combined to form optional embodiments of the present application, which will not be described in detail here.

[0121] It should be understood that the detection device embodiment and the method embodiment may correspond to each other, and similar descriptions may refer to the method embodiment. To avoid repetition, no further description is given here. Specifically, the detection device may execute the above detection method embodiment, and the aforementioned and other operations and / or functions of each unit in the detection device respectively implement the corresponding processes of the above method embodiment, which will not be described here for the sake of brevity.

[0122] Optionally, the present application further provides a computer device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0123] Fig. 9 This is a schematic diagram of the structure of a computer device provided in an embodiment of the present application, and the computer device may be a terminal or a server. Fig. 9 As shown, the computer device 300 may include: a communication interface 301, a memory 302, a processor 303 and a communication bus 304. The communication interface 301, the memory 302, and the processor 303 communicate with each other through the communication bus 304. The communication interface 301 is used for the computer device 300 to communicate data with external devices. The memory 302 can be used to store software programs and modules, and the processor 303 runs the software programs and modules stored in the memory 302, such as the software programs of the corresponding operations in the aforementioned method embodiments.

[0124] Optionally, the processor 303 may call the software program and module stored in the memory 302 to perform the following operations:

[0125] Detect the current change signal on the power supply circuit of the ultrasonic welding equipment;

[0126] The working state of the ultrasonic welding device is determined according to the current change signal, and the working state is one of a normal pressing state and an abnormal state.

[0127] A person of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be completed by instructions, or by controlling related hardware through instructions. The instructions may be stored in a computer-readable storage medium and loaded and executed by a processor.

[0128] To this end, the present application embodiment provides a computer-readable storage medium, which stores multiple computer programs, which can be loaded by a processor to execute the steps in any detection method provided in the present application embodiment. The specific implementation of each of the above operations can be referred to the previous embodiments, which will not be repeated here.

[0129] The storage medium may include: a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0130] Since the computer program stored in the storage medium can execute the steps in any detection method provided in the embodiments of the present application, the beneficial effects that can be achieved by any detection method provided in the embodiments of the present application can be achieved. Please refer to the previous embodiments for details and will not be repeated here.

[0131] The embodiment of the present application also provides a computer program product, which includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the corresponding process in any one of the detection methods in the embodiment of the present application, which will not be described here for the sake of brevity.

[0132] The embodiment of the present application also provides a computer program, which includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the corresponding process in any detection method in the embodiment of the present application, which will not be described here for the sake of brevity.

[0133] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A detection method, characterized in that: The method comprises: Detect the current change signal on the power supply circuit of the ultrasonic welding equipment; The working state of the ultrasonic welding device is determined according to the current change signal, and the working state is one of a normal pressing state and an abnormal state.

2. The detection method according to claim 1, characterized in that The detecting of the power supply current change information on the power supply circuit of the ultrasonic welding device includes: Detecting a current change signal on a power supply line of a power supply circuit of an ultrasonic welding device by using a current transformer in the detection circuit; Determining the working state of the ultrasonic welding device according to the current change signal includes: Processing the current change signal by the detection circuit to obtain a target voltage; Comparing the target voltage with a reference voltage; If the voltage comparison result is that the target voltage is greater than the reference voltage, it is determined that the working state of the ultrasonic welding device is a normal pressing state; or If the voltage comparison result is that the target voltage is less than or equal to the reference voltage, it is determined that the working state of the ultrasonic welding device is an abnormal state.

3. The detection method according to claim 2, characterized in that The detection circuit also includes a rectifier bridge stack, a first resistor, a second resistor, a first capacitor and a second capacitor. The input end of the rectifier bridge stack is connected to the current transformer. The positive output end of the rectifier bridge stack is respectively connected to the first end of the first resistor, the first end of the first capacitor, and the first end of the second resistor. The negative output end of the rectifier bridge stack is respectively connected to the second end of the first resistor, the second end of the first capacitor, the second end of the second capacitor, and the ground end. The first end of the second capacitor is connected to the second end of the second resistor. The step of performing signal processing on the current change signal through the detection circuit to obtain a target voltage includes: The current change signal is rectified by the rectifier bridge stack to convert the current change signal into a direct current signal; The DC current signal is sampled and processed by the first resistor to obtain a pulse voltage signal; Filtering the pulse voltage signal through the first capacitor to obtain a filtered pulse voltage signal; The filtered pulse voltage signal is integrated by the second capacitor to obtain a target voltage, wherein the second resistor is used to limit a charging current of the second capacitor.

4. The detection method according to claim 3, characterized in that The detection circuit also includes a third resistor, a fourth resistor, a fifth resistor, a comparator and a reference voltage source, wherein the first end of the third resistor is respectively connected to the second end of the second resistor, the first end of the second capacitor and the positive input end of the comparator, the second end of the third resistor is respectively connected to the second end of the second capacitor, the first end of the reference voltage source and the second fixed end of the fifth resistor, the first end of the fourth resistor is connected to a power supply, the second end of the fourth resistor is connected to the first fixed end of the fifth resistor, the second end of the reference voltage source is connected to the adjustable end of the fifth resistor, the third end of the reference voltage source is connected to the first fixed pin of the fifth resistor and the negative input end of the comparator, wherein the third resistor is used to filter out interference signals on the positive input end of the comparator; The comparing the target voltage with a reference voltage comprises: Obtaining the reference voltage through a voltage stabilization circuit formed by the fourth resistor, the fifth resistor and the reference voltage stabilization source; Performing a voltage comparison between the target voltage and the reference voltage through the comparator, and outputting a level corresponding to the voltage comparison result through the output terminal of the comparator; Wherein, if the voltage comparison result is that the target voltage is greater than the reference voltage, the output terminal of the comparator outputs a high level, and it is determined that the working state of the ultrasonic welding equipment is a normal pressing state; Alternatively, if the voltage comparison result is that the target voltage is less than or equal to the reference voltage, the output terminal of the comparator outputs a low level, and it is determined that the working state of the ultrasonic welding device is an abnormal state.

5. The detection method according to claim 4, characterized in that: The detection circuit further includes a driving switch, a relay and a signal lamp, wherein a first end of the driving switch is connected to an output end of the comparator, a second end of the driving switch is connected to a negative power supply electrode of the relay, a third end of the driving switch is connected to a ground end of the comparator, and the signal lamp is connected to the relay; The method further comprises: If it is determined that the working state of the ultrasonic welding equipment is a normal pressing state, the driving switch is turned on according to the high level to control the relay to be attracted and light the signal light.

6. The detection method according to claim 5, characterized in that The detection circuit also includes a voltage divider circuit, which is connected to the output end of the comparator. The voltage divider circuit is used to divide the output voltage of the comparator, and the divided output voltage is used to turn on the drive switch.

7. The detection method according to claim 1, characterized in that The detecting of the power supply current change information on the power supply circuit of the ultrasonic welding device includes: Detecting the current change signal on the power supply line of the power supply circuit of the ultrasonic welding equipment through an oscilloscope; Determining the working state of the ultrasonic welding device according to the current change signal includes: The power supply circuit change signal is waveform-drawn by the oscilloscope to obtain a target waveform diagram corresponding to the power supply circuit change signal; Graphically comparing the target waveform with a standard pressing waveform corresponding to the normal pressing state; If the image comparison results are identical or similar, it is determined that the working state of the ultrasonic welding device is a normal pressing state; or If the image comparison result is not similar, it is determined that the working state of the ultrasonic welding device is abnormal.

8. A detection device, characterized in that: The device comprises: A detection unit, used to detect a current change signal on a power supply circuit of an ultrasonic welding device; The determination unit is used to determine the working state of the ultrasonic welding device according to the current change signal, and the working state is one of a normal pressing state and an abnormal state.

9. A computer device, characterized in that: The computer device includes a processor and a memory, wherein a computer program is stored in the memory, and the processor is used to execute the detection method according to any one of claims 1 to 7 by calling the computer program stored in the memory.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and the computer program is suitable for being loaded by a processor to execute the detection method according to any one of claims 1 to 7.

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