Power adapter detection method and system, terminal and medium

Abstract

The invention discloses a power adapter detection method and system, a terminal and a medium, and relates to the technical field of power adapter detection. According to the main technical scheme, the test starting voltage and the test ending voltage of the power adapter are determined; adjusting the input voltage of the power adapter, gradually increasing from the test starting voltage to the test ending voltage, and collecting the performance parameters of the power adapter in real time; according to the acquired performance parameters and the corresponding input voltage, constructing a performance parameter change curve of the performance parameters along with the change of the input voltage; extracting a performance parameter maximum value and a performance parameter minimum value from the performance parameter change curve; whether the performance parameter maximum value and the performance parameter minimum value meet the performance parameter threshold value or not is judged; if yes, marking the power adapter as a qualified product; and if not, marking the power adapter as an unqualified product. The purposes of reducing casual inspection omission hidden defect risks, meeting batch factory inspection and reducing after-sales maintenance cost and brand reputation risks are expected to be achieved.

Description

Technical Field

[0001] This invention relates to the field of power adapter testing technology, specifically to a power adapter testing method, system, terminal, and medium. Background Technology

[0002] A power adapter, also known as an AC-DC power adapter, is a device that converts input AC power into output DC power. A power adapter typically consists of a casing, a power transformer, and a rectifier circuit. Its working principle is to transform the input AC power through the transformer and then convert it into DC power through the rectifier.

[0003] With the widespread application of fast charging technology, the safety performance of power adapters faces significant challenges. Damage or malfunction of the power adapter during operation can damage both the electronic device and the adapter itself, and in severe cases, even cause safety accidents. Therefore, how to test the performance of power adapters before they leave the factory to ensure their quality is a pressing technical issue that needs to be addressed. Summary of the Invention

[0004] The purpose of this invention is to provide a power adapter testing method, system, terminal, and medium, which solves the problem of how to test the performance of power adapters before they leave the factory to ensure the quality of power adapters.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] Firstly, a power adapter testing method is provided, including the following operations:

[0007] Based on the rated input voltage of the power adapter, determine the test start voltage and test end voltage of the power adapter; wherein the test start voltage is less than or equal to the minimum value of the rated input voltage, and the test end voltage is greater than or equal to the maximum value of the rated input voltage;

[0008] Adjust the input voltage of the power adapter, gradually increasing it from the test start voltage to the test end voltage, and collect the performance parameters of the power adapter in real time;

[0009] Based on the collected performance parameters and corresponding input voltage, construct a performance parameter variation curve as the input voltage changes;

[0010] Extract the maximum and minimum values ​​of the performance parameters from the performance parameter variation curves;

[0011] Determine whether the maximum and minimum values ​​of the performance parameters both meet the performance parameter thresholds; if yes, mark the power adapter as a qualified product; if not, mark the power adapter as an unqualified product.

[0012] A further proposed approach is to include no-load performance parameters and load performance parameters in the performance parameters.

[0013] A further proposed solution is to perform the following operations when collecting the no-load performance parameters in real time:

[0014] Ensure the output of the power adapter is unloaded.

[0015] Adjust the input voltage of the power adapter, gradually increasing it from the test start voltage to the test end voltage, and collect the no-load performance parameters of the power adapter in real time.

[0016] Based on the collected no-load performance parameters and the corresponding input voltage, a curve showing the change of no-load performance parameters with the input voltage is constructed.

[0017] Extract the maximum and minimum values ​​of the no-load performance parameters from the no-load performance parameter variation curve;

[0018] Determine whether the maximum and minimum values ​​of the no-load performance parameters both meet the no-load performance parameter thresholds; if yes, mark the power adapter as a qualified product; if not, mark the power adapter as an unqualified product.

[0019] A further proposed solution is to perform the following operations when collecting the load performance parameters in real time:

[0020] S100, determine the voltage step value based on the test start voltage and the test end voltage;

[0021] S200, Set the initial value of the input voltage of the power adapter, wherein the initial value is the test start voltage;

[0022] S300 gradually increases the load on the power adapter output from no load to full load and collects the load performance parameters of the power adapter in real time.

[0023] S400 constructs a load change curve of load performance parameters as the load changes based on the collected load performance parameters and the corresponding load.

[0024] S500: Extract the maximum and minimum values ​​of the load performance parameters from the load change curve, and determine whether the maximum and minimum values ​​of the load performance parameters both meet the load performance parameter threshold. If yes, proceed to S600; otherwise, mark the power adapter as a non-conforming product.

[0025] S600, Set the current value of the input voltage of the voltage adapter, wherein the current value is the sum of the initial value and the voltage step value;

[0026] S700, take the current value as the initial value, and repeat steps S200 to S600 until the current value is greater than the test termination voltage, and mark the power adapter as a qualified product.

[0027] A further proposed solution is that the performance parameters include output voltage, input current, output current, power, efficiency, cold start delay time, power-off output sustain time, output voltage rise time, as well as ripple and noise.

[0028] In a second aspect, a power adapter detection system is provided, the system being adapted to the method described in the first aspect, the system comprising:

[0029] A first processing module is configured to determine the test start voltage and test end voltage of the power adapter based on the rated input voltage of the power adapter; wherein the test start voltage is less than or equal to the minimum value of the rated input voltage, and the test end voltage is greater than or equal to the maximum value of the rated input voltage.

[0030] The second processing module is used to adjust the input voltage of the power adapter, gradually increasing it from the test start voltage to the test end voltage, and to collect the performance parameters of the power adapter in real time.

[0031] The construction module is used to construct a performance parameter variation curve of the performance parameters as the input voltage changes, based on the collected performance parameters and the corresponding input voltage.

[0032] The extraction module is used to extract the maximum and minimum values ​​of the performance parameters from the performance parameter change curve;

[0033] The judgment module is used to determine whether the maximum and minimum values ​​of the performance parameters both meet the performance parameter thresholds; if yes, the power adapter is marked as a qualified product; if no, the power adapter is marked as an unqualified product.

[0034] A further improvement is that the system also includes a testing module, which includes ceramic capacitors and electrolytic capacitors.

[0035] Thirdly, a terminal is provided, including a processor and a memory, the memory being used to store processor-executable instructions; wherein the processor is configured to invoke the instructions stored in the memory to perform the method as described in the first aspect.

[0036] Fourthly, a computer-readable storage medium is provided that stores computer program instructions thereon, which, when executed by a processor, implement the method described in the first aspect.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] On the one hand, full-voltage range scanning can detect anomalies in power adapters at critical voltage points (such as low-voltage startup), such as sudden drops or oscillations in output voltage, aiming to reduce the risk of overlooking hidden defects during spot checks. On the other hand, automated testing processes replace manual spot checks, shortening the time for each test, aiming to meet the requirements for batch factory testing. Furthermore, early screening of defective products aims to reduce after-sales maintenance costs and brand reputation risks. Attached Figure Description

[0039] Figure 1 This is a flowchart illustrating a power adapter detection method in this embodiment. Detailed Implementation

[0040] The invention will now be further described with reference to the accompanying drawings.

[0041] Example 1: This example provides a power adapter detection method, including the following operations:

[0042] S10. Determine the test start voltage and test end voltage of the power adapter based on the rated input voltage of the power adapter; wherein the test start voltage is less than or equal to the minimum value of the rated input voltage, and the test end voltage is greater than or equal to the maximum value of the rated input voltage;

[0043] For example, during implementation, the rated input voltage of the power adapter under test is obtained. For instance, the rated input voltage of the power adapter is a standard 100-240V AC. Based on the rated input voltage of the power adapter under test, the test start voltage is set to be ≤ the rated minimum, such as 90V, and the test end voltage is set to be ≥ the rated maximum, such as 264V. This aims to cover voltage fluctuations that may occur in actual use (such as grid fluctuations or low-voltage scenarios), thereby ensuring that the power adapter can still operate stably under extreme input conditions.

[0044] S20. Adjust the input voltage of the power adapter, gradually increasing it from the test start voltage to the test end voltage, and collect the performance parameters of the power adapter in real time;

[0045] In this embodiment, the performance parameters include output voltage, input current, output current, power, efficiency, cold start delay time, power-off output sustain time, output voltage rise time, and ripple and noise.

[0046] For example, during implementation, a programmable AC power source is used as the input source. The output terminal of the programmable AC power source is connected to the input terminal of the power adapter, so that the initial output voltage of the programmable AC power source is equal to the test start voltage. The output voltage of the programmable AC power source is then gradually increased from the test start voltage to the test termination voltage with a preset voltage step value.

[0047] Furthermore, after the output voltage of the programmable AC power supply increases by one voltage step and stabilizes, the performance parameters of the power adapter are collected. These performance parameters include output voltage, input current, output current, power, efficiency, cold start delay time, power-off output hold-up time, output voltage rise time, as well as ripple and noise.

[0048] S30. Based on the collected performance parameters and the corresponding input voltage, construct a performance parameter variation curve as the performance parameters change with the input voltage;

[0049] For example, during implementation, the collected performance parameters are fitted with the corresponding input voltages to obtain performance parameter variation curves as the input voltage changes. A corresponding curve is generated for each performance parameter, such as the output voltage variation curve as the input voltage changes.

[0050] S40. Extract the maximum and minimum values ​​of the performance parameters from the performance parameter variation curves;

[0051] S50. Determine whether the maximum and minimum values ​​of the performance parameters both meet the performance parameter thresholds; if yes, mark the power adapter as a qualified product; if not, mark the power adapter as an unqualified product.

[0052] For example, during implementation, the maximum and minimum values ​​of the performance parameters are extracted from the performance parameter variation curve. These values ​​are then compared to preset performance parameter threshold ranges. If both the maximum and minimum values ​​meet the threshold, the power adapter is considered a qualified product. If the maximum value does not meet the threshold, but the minimum value does, the power adapter is considered an unqualified product. Similarly, if both the maximum and minimum values ​​do not meet the threshold, the power adapter is considered an unqualified product. For instance, if the output voltage threshold is within ±5% of the nominal value (e.g., 5.0V ± 0.25V, meaning the output voltage threshold is 4.75–5.25V), then when the maximum output voltage is 5.3V and the minimum is 4.8V, the power adapter is considered an unqualified product. The power adapter is considered unqualified when the maximum output voltage is 5.2V and the minimum output voltage is 4.7V. The power adapter is considered unqualified when the maximum output voltage is 5.3V and the minimum output voltage is 4.7V. The power adapter is considered qualified when the maximum output voltage is 5.2V and the minimum output voltage is 4.8V.

[0053] On the one hand, full-voltage range scanning can detect anomalies in power adapters at critical voltage points (such as low-voltage startup), such as sudden drops or oscillations in output voltage, aiming to reduce the risk of overlooking hidden defects during spot checks. On the other hand, automated testing processes replace manual spot checks, shortening the time for each test, aiming to meet the requirements for batch factory testing. Furthermore, early screening of defective products aims to reduce after-sales maintenance costs and brand reputation risks.

[0054] In this embodiment, the performance parameters include no-load performance parameters and load performance parameters.

[0055] For example, in implementation, performance parameters include no-load performance parameters and load performance parameters. Specifically, performance parameters include no-load output voltage, no-load input current, no-load output current, no-load power, no-load efficiency, no-load cold start delay time, no-load shutdown output sustain time, no-load output voltage rise time, and no-load ripple and noise, etc., as well as load output voltage, load input current, load output current, load power, load efficiency, load cold start delay time, load shutdown output sustain time, load output voltage rise time, and load ripple and noise, etc. No-load testing captures hidden startup faults (such as abnormal cold start delay at 90V), while load testing exposes dynamic load adaptability defects (such as output voltage oscillation during current jumps), aiming to reduce the sampling omission rate and thus improve the safety performance of power adapter products.

[0056] In this embodiment, when collecting the no-load performance parameters in real time, the following operations are performed:

[0057] L100. Ensures the power adapter's output is unloaded.

[0058] For example, during implementation, all loads at the output of the power adapter are disconnected so that the output of the power adapter is in an unloaded state.

[0059] L200. Adjust the input voltage of the power adapter, gradually increasing it from the test start voltage to the test end voltage, and collect the no-load performance parameters of the power adapter in real time.

[0060] For example, during implementation, with the power adapter's output in an unloaded state, the output voltage of the programmable AC power supply is gradually increased from the test start voltage to the test termination voltage using preset voltage step values. After each voltage step increase and stabilization of the programmable AC power supply's output voltage, the unloaded performance parameters of the power adapter are collected. These unloaded performance parameters include unloaded output voltage, unloaded input current, unloaded output current, unloaded power, unloaded efficiency, unloaded cold start delay time, unloaded shutdown output sustain time, unloaded output voltage rise time, and unloaded ripple and noise.

[0061] L300. Based on the collected no-load performance parameters and the corresponding input voltage, construct the no-load performance parameter variation curve as the input voltage changes;

[0062] For example, during implementation, the input voltage is used as the horizontal axis and the no-load performance parameter is used as the vertical axis. The curve is fitted using the least squares method to obtain the curve of the no-load performance parameter changing with the input voltage.

[0063] L400. Extract the maximum and minimum values ​​of the no-load performance parameters from the no-load performance parameter variation curve;

[0064] L500. Determine whether the maximum and minimum values ​​of the no-load performance parameters both meet the no-load performance parameter thresholds; if yes, mark the power adapter as a qualified product; if not, mark the power adapter as an unqualified product.

[0065] For example, during implementation, the maximum and minimum values ​​of the no-load performance parameters are extracted from the no-load performance parameter variation curve. These values ​​are then compared to preset no-load performance parameter threshold ranges. If both the maximum and minimum values ​​meet the threshold, the power adapter is considered a qualified product. If the maximum value does not meet the threshold, but the minimum value does, the power adapter is considered an unqualified product. Similarly, if both the maximum and minimum values ​​do not meet the threshold, the power adapter is considered an unqualified product. For example, the no-load power threshold is less than or equal to 0.3W, the no-load carrier ripple and noise threshold is less than or equal to 200mV, the no-load output voltage threshold is greater than or equal to 4.75V, the no-load output voltage threshold is less than or equal to 5.25V, the no-load cold start delay time threshold is less than or equal to 300ms, and the no-load efficiency threshold is greater than or equal to 68.17%.

[0066] In this embodiment, when collecting the load performance parameters in real time, the following operations are performed:

[0067] S100, determine the voltage step value based on the test start voltage and the test end voltage;

[0068] For example, during implementation, the voltage step value is determined based on the difference between the test start voltage and the test end voltage, such that the difference between the test start voltage and the test end voltage is N voltage step values. Here, N is an integer. For instance, if the test start voltage is 90V and the test end voltage is 264V, the difference between the test end voltage and the test start voltage is 174V. Assuming the voltage step value is 3V, then N = 174V / 3V = 58.

[0069] S200, Set the initial value of the input voltage of the power adapter, wherein the initial value is the test start voltage;

[0070] For example, during implementation, the initial input voltage of the power adapter is set to the test start voltage. That is, the initial input voltage is 90V.

[0071] S300 gradually increases the load on the power adapter output from no load to full load and collects the load performance parameters of the power adapter in real time.

[0072] For example, during implementation, with the initial input voltage of the power adapter at 90V, the load at the power adapter output is gradually increased from no load to full load. During this process, the load performance parameters of the power adapter are collected in real time. These load performance parameters include load output voltage, load input current, load output current, load power, load efficiency, load cold start delay time, load shutdown output sustaining time, load output voltage rise time, and load ripple and noise.

[0073] S400 constructs a load change curve of load performance parameters as the load changes based on the collected load performance parameters and the corresponding load.

[0074] For example, during implementation, the input voltage is used as the horizontal axis and the load performance parameter is used as the vertical axis. The curve is fitted using the least squares method to obtain the load performance parameter variation curve when the input voltage is 90V.

[0075] S500: Extract the maximum and minimum values ​​of the load performance parameters from the load change curve, and determine whether the maximum and minimum values ​​of the load performance parameters both meet the load performance parameter threshold. If yes, proceed to S600; otherwise, mark the power adapter as a non-conforming product.

[0076] For example, during implementation, the maximum and minimum values ​​of the load performance parameters are extracted from the load performance parameter change curve. These values ​​are then compared to preset load performance parameter threshold ranges. If both the maximum and minimum values ​​meet the load performance parameter thresholds, the process proceeds to step S600. If the maximum value does not meet the load performance parameter threshold, but the minimum value does, the power supply is considered a non-compliant product. Similarly, if both the maximum and minimum values ​​do not meet the load performance parameter thresholds, the power supply is considered a non-compliant product.

[0077] S600, Set the current value of the input voltage of the voltage adapter, wherein the current value is the sum of the initial value and the voltage step value;

[0078] For example, during implementation, when the initial input voltage of the power adapter is 90V, and both the maximum and minimum values ​​of the load performance parameters meet the load performance parameter thresholds, the current value of the voltage adapter's input voltage is set. The current value of the input voltage is the sum of the initial value and the voltage step value. That is, the current value of the input voltage is 93V.

[0079] S700, take the current value as the initial value, and repeat steps S200 to S600 until the current value is greater than the test termination voltage, and mark the power adapter as a qualified product.

[0080] For example, during implementation, the initial value of the input voltage is replaced with the current value, and steps S200 to S600 are executed repeatedly. The loop terminates when the current input voltage value exceeds the test termination voltage, and the power adapter is marked as a qualified product. This structure allows for the detection of various load performance parameters as the load increases from no-load to full-load under different input voltages. The aim is to improve the comprehensiveness of power adapter performance testing, thereby further enhancing power adapter safety and reducing after-sales maintenance costs and brand reputation risks.

[0081] Example 2: This example provides a power adapter testing system. The system is applicable to the method described in the first aspect. The system includes a first processing module, a second processing module, a construction module, an extraction module, and a judgment module. The first processing module is used to determine the test start voltage and test end voltage of the power adapter based on the rated input voltage of the power adapter; wherein the test start voltage is less than or equal to the minimum value of the rated input voltage, and the test end voltage is greater than or equal to the maximum value of the rated input voltage. The second processing module is used to adjust the input voltage of the power adapter, gradually increasing it from the test start voltage to the test end voltage, and to collect the performance parameters of the power adapter in real time. The construction module is used to construct a performance parameter variation curve of the performance parameters as a function of the input voltage based on the collected performance parameters and the corresponding input voltage. The extraction module is used to extract the maximum and minimum values ​​of the performance parameters from the performance parameter variation curve. The judgment module is used to determine whether the maximum and minimum values ​​of the performance parameters both meet the performance parameter thresholds; if yes, the power adapter is marked as a qualified product; if not, the power adapter is marked as a non-qualified product.

[0082] The power adapter testing system in this embodiment, on the one hand, can detect anomalies in the power adapter at critical voltage points (such as sudden drops or oscillations in output voltage) through full-voltage range scanning, aiming to reduce the risk of overlooking hidden defects during random inspections. On the other hand, the automated testing process replaces manual random inspections, shortening the time for each test, aiming to meet the requirements for batch factory testing. Furthermore, it can screen out defective products at an early stage, aiming to reduce after-sales maintenance costs and brand reputation risks.

[0083] In this embodiment, the system further includes a testing module, which includes ceramic capacitors and electrolytic capacitors.

[0084] For example, during implementation, when testing the output ripple voltage under rated input and output conditions (25°C), the oscilloscope is selected with a 20MHz bandwidth limit, and during testing, a 0.1uF ceramic capacitor and a 10uF electrolytic capacitor are connected in parallel at the output of the power adapter.

[0085] This embodiment provides a terminal, including a processor and a memory, the memory being used to store processor-executable instructions; wherein the processor is configured to invoke the instructions stored in the memory to execute the method as described in the first aspect.

[0086] This embodiment also provides a computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the method described in the first aspect.

[0087] Although the invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter arrangement within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A method for testing a power adapter, characterized in that, Includes the following operations: Based on the rated input voltage of the power adapter, determine the test start voltage and test end voltage of the power adapter; wherein the test start voltage is less than or equal to the minimum value of the rated input voltage, and the test end voltage is greater than or equal to the maximum value of the rated input voltage; Adjust the input voltage of the power adapter, gradually increasing it from the test start voltage to the test end voltage, and collect the performance parameters of the power adapter in real time; Based on the collected performance parameters and corresponding input voltage, construct a performance parameter variation curve as the input voltage changes; Extract the maximum and minimum values ​​of the performance parameters from the performance parameter variation curves; Determine whether the maximum and minimum values ​​of the performance parameters both meet the performance parameter thresholds; if yes, mark the power adapter as a qualified product; if not, mark the power adapter as an unqualified product.

2. The power adapter testing method according to claim 1, characterized in that, The performance parameters include no-load performance parameters and load performance parameters.

3. The power adapter testing method according to claim 2, characterized in that, When collecting the no-load performance parameters in real time, perform the following operations: Ensure the output of the power adapter is unloaded. Adjust the input voltage of the power adapter, gradually increasing it from the test start voltage to the test end voltage, and collect the no-load performance parameters of the power adapter in real time. Based on the collected no-load performance parameters and the corresponding input voltage, a curve showing the change of no-load performance parameters with the input voltage is constructed. Extract the maximum and minimum values ​​of the no-load performance parameters from the no-load performance parameter variation curve; Determine whether the maximum and minimum values ​​of the no-load performance parameters both meet the no-load performance parameter threshold. If so, mark the power adapter as a qualified product; If not, mark the power adapter as a non-conforming product.

4. The power adapter testing method according to claim 3, characterized in that, When collecting the load performance parameters in real time, perform the following operations: S100, determine the voltage step value based on the test start voltage and the test end voltage; S200, Set the initial value of the input voltage of the power adapter, wherein the initial value is the test start voltage; S300 gradually increases the load on the power adapter output from no load to full load and collects the load performance parameters of the power adapter in real time. S400 constructs a load change curve of load performance parameters as the load changes based on the collected load performance parameters and the corresponding load. S500: Extract the maximum and minimum values ​​of the load performance parameters from the load change curve, and determine whether the maximum and minimum values ​​of the load performance parameters both meet the load performance parameter threshold. If yes, proceed to S600; otherwise, mark the power adapter as a non-conforming product. S600, Set the current value of the input voltage of the voltage adapter, wherein the current value is the sum of the initial value and the voltage step value; S700, take the current value as the initial value, and repeat steps S200 to S600 until the current value is greater than the test termination voltage, and mark the power adapter as a qualified product.

5. The power adapter testing method according to claim 1, characterized in that: The performance parameters include output voltage, input current, output current, power, efficiency, cold start delay time, power-off output hold time, output voltage rise time, as well as ripple and noise.

6. A power adapter testing system, characterized in that, The system is applicable to the method as described in any one of claims 1-5, and the system comprises: A first processing module is configured to determine the test start voltage and test end voltage of the power adapter based on the rated input voltage of the power adapter; wherein the test start voltage is less than or equal to the minimum value of the rated input voltage, and the test end voltage is greater than or equal to the maximum value of the rated input voltage. The second processing module is used to adjust the input voltage of the power adapter, gradually increasing it from the test start voltage to the test end voltage, and to collect the performance parameters of the power adapter in real time. The construction module is used to construct a performance parameter variation curve of the performance parameters as the input voltage changes, based on the collected performance parameters and the corresponding input voltage. The extraction module is used to extract the maximum and minimum values ​​of the performance parameters from the performance parameter change curve; The judgment module is used to determine whether the maximum and minimum values ​​of the performance parameters both meet the performance parameter thresholds; if yes, the power adapter is marked as a qualified product; if no, the power adapter is marked as an unqualified product.

7. The system according to claim 6, characterized in that: It also includes a testing module, which comprises ceramic capacitors and electrolytic capacitors.

8. A terminal, characterized in that, include: A processor and a memory, wherein the memory is used to store processor-executable instructions; The processor is configured to invoke instructions stored in the memory to execute the method as described in any one of claims 1-5.

9. A computer-readable storage medium having computer program instructions stored thereon, characterized in that, When the computer program instructions are executed by the processor, they implement the method as described in any one of claims 1-5.

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