CN104965139A - Method and terminal for intelligently detecting adapter performance - Google Patents

Abstract

The invention discloses a method and a terminal for intelligently detecting the performance of an adapter. The method includes: in the adapter performance detection mode, respectively sampling the no-load voltage U1 of the adapter and loading a load resistance at the output end of the power supply of the adapter. The actual working voltage U2 at both ends of the load resistor, and the performance of the adapter is determined according to the no-load voltage U1 and the actual working voltage U2. The present invention respectively samples the no-load voltage U1 of the adapter and the actual working voltage U2 at both ends of the load resistance after loading the load resistance, and can determine whether the performance of the adapter is qualified according to the no-load voltage U1 and the actual working voltage U2 , which is very convenient, and avoids problems such as shortening battery life by connecting the charging circuit and battery of the terminal to an adapter with poor performance, which greatly improves the user's product experience.

Description

A method and terminal for intelligently detecting adapter performance

technical field

The invention relates to the technical field of circuit parameter detection, in particular to a method for intelligently detecting the performance of an adapter, and to a terminal for intelligently detecting the performance of the adapter.

Background technique

The popularization of smart phones and the open development of android have led to the rapid development of mobile phones. Not only are fake mobile phones emerging in endlessly, but also fake accessories are everywhere. Usually, it is very expensive to buy better accessories without buying qualified products. Headache. This is the case with counterfeit adapters on the market. After buying the adapter, it breaks down within a few days after returning home, or the performance does not meet the requirements at all, which violates the interests of many consumers. There are many factors that affect the performance of the adapter, such as: the level of technology, the materials used, etc., which directly or indirectly affect the size of the internal resistance of the adapter, that is, the equivalent loss resistance of the line loss when the adapter is working. Generally speaking, the internal resistance The smaller the size, the better the adapter performance. However, the internal resistance of the adapter cannot be known by observing the appearance of the adapter or judging the weight of the adapter, lacking an effective means of detecting the performance of the adapter.

Contents of the invention

Embodiments of the present invention provide a method and a terminal for intelligently detecting adapter performance to solve the above technical problems.

For reaching this purpose, the present invention adopts following technical scheme:

In the first aspect, the embodiment of the present invention provides a method for intelligently detecting adapter performance, including:

The terminal is connected to the power supply through the adapter;

In the adapter performance detection mode, the no-load voltage U1 of the adapter and the actual working voltage U2 at both ends of the load resistance after the load resistance is loaded at the power supply output end of the adapter are respectively obtained by sampling;

According to the no-load voltage U1 and the actual working voltage U2, the performance of the adapter is determined.

Preferably, the step: in the adapter performance detection mode, respectively sample the no-load voltage U1 of the adapter and the actual working voltage U2 at both ends of the load resistor after the load resistor is loaded at the power output of the adapter, specifically include:

After the terminal enters the adapter performance detection mode, the no-load voltage U1 of the adapter is obtained by sampling;

Read the correspondence between the pre-established nominal output current and the load resistance required to be loaded from the memory;

According to the corresponding relationship and the pre-input nominal output current of the adapter, determine the load resistance to be loaded;

Controlling the power output terminal of the adapter to connect to a determined load resistance, so as to energize the load resistance;

The actual working voltage U2 at both ends of the load resistor is obtained by sampling.

Preferably, the step: determining the performance of the adapter according to the no-load voltage U1 and the actual working voltage U2, specifically includes:

Judging whether the value of U1-U2 is less than or equal to a preset voltage threshold;

If so, determine that the performance of the adapter is qualified, and display a notification message that the performance of the adapter is qualified on the display screen of the terminal;

Otherwise, it is determined that the performance of the adapter is unqualified, and a notification message that the performance of the adapter is unqualified is displayed on the display screen of the terminal.

Preferably, the step: determining the performance of the adapter according to the no-load voltage U1 and the actual working voltage U2, specifically includes:

Calculate and obtain the resistance value of the internal resistance of the adapter according to U1, U2 and the resistance value of the loaded load resistance;

The resistance value of the internal resistance of the adapter is displayed on the display screen of the terminal.

Preferably, the step: after the terminal is connected to the power supply through the adapter, further includes:

Detect whether the adapter performance detection function of the terminal is enabled;

If so, the control terminal enters the adapter performance detection mode;

Otherwise, the control terminal enters the battery charging mode.

Preferably, the step: after the control terminal enters the battery charging mode, further includes:

Charge the battery of the terminal.

Preferably, the step: before the terminal connects to the power supply through the adapter, further includes:

preset a voltage threshold;

Pre-establish the correspondence between the nominal output current and the load resistance required to be loaded;

storing the corresponding relationship and the voltage threshold in a memory of the terminal.

Preferably, the step: before the terminal connects to the power supply through the adapter, further includes:

Input the nominal output current of the adapter to be tested in advance.

In the second aspect, the embodiment of the present invention also provides a terminal for intelligently detecting adapter performance, including:

The adapter performance parameter detection circuit is used to respectively sample the no-load voltage U1 of the adapter and load the load resistance at the power output end of the adapter when the terminal is connected to the power supply through the adapter and works in the adapter performance detection mode The actual working voltage U2 at both ends of the load resistance, and send the sampled U1 and U2 to the numerical processing module of the terminal;

A numerical processing module, configured to determine the performance of the adapter according to the no-load voltage U1 and the actual working voltage U2.

Preferably, the terminal further includes a working mode switching switch, a memory, and a current parameter input module;

The working mode switching switch is used to connect the power input end of the adapter performance parameter detection circuit to the power output end of the adapter after the terminal enters the adapter performance detection mode;

The current parameter input module is used for the user to input the nominal output current of the adapter to be detected;

The memory is used to store the correspondence between the pre-established nominal output current and the load resistance to be loaded, and the nominal output current of the adapter input by the user through the current parameter input module;

The adapter performance parameter detection circuit includes a load switch, a load resistor and a voltage sampling module;

The voltage sampling module is used to sample the no-load voltage U1 of the adapter after the terminal enters the adapter performance detection mode, and send it to the numerical processing module;

The numerical processing module is also used to read the corresponding relationship and the nominal output current of the adapter input by the user from the memory after receiving the no-load voltage U1 sent by the voltage sampling module; The corresponding relationship and the nominal output current determine the load resistance to be loaded; and are also used to send a switch control signal to the load switch to turn on the determined load resistance after the load resistance to be loaded is determined;

The load switch is used to control the power output terminal of the adapter to connect to a certain load resistance after receiving the switch control signal, so as to energize the load resistance;

The voltage sampling module is also used to sample the actual working voltage U2 at both ends of the load resistor after the load resistor is powered on, and send it to the value processing module.

Preferably, the terminal further includes a display screen;

The determining the performance of the adapter according to the no-load voltage U1 and the actual working voltage U2 specifically includes:

The numerical processing module judges whether the value of U1-U2 is less than or equal to a preset voltage threshold; if so, it determines that the performance of the adapter is qualified, and sends a control signal indicating that the performance of the adapter is qualified to the display screen of the terminal; otherwise, it determines that the performance of the adapter is unqualified , sending a control signal indicating that the performance of the display adapter is unqualified to the display screen of the terminal;

The display screen is used to display the notification information of the qualified performance of the adapter on the display screen of the terminal if the control signal of the qualified performance of the display adapter is received; The notification message that the performance of the adapter is unqualified is displayed on the screen.

Preferably, the determining the performance of the adapter according to the no-load voltage U1 and the actual working voltage U2 specifically includes:

The numerical processing module calculates the resistance value of the internal resistance of the adapter according to U1, U2 and the resistance value of the loaded load resistance, and sends it to the display screen;

The display screen is also used to display the resistance value of the adapter's internal resistance if the calculated resistance value of the adapter's internal resistance is received.

Preferably, the terminal further includes a performance detection function switch, a working mode control module, a charging circuit and a battery;

The performance detection function switch is used to enable or disable the adapter performance detection function of the terminal; wherein, the switch state of the performance detection function switch includes the switch state of enabling the adapter performance detection function of the terminal and the switch of disabling the adapter performance detection function of the terminal state;

The working mode control module is also used to obtain the switching state of the performance detection function switch after the power supply is connected through the adapter, and judge whether the adapter performance detection function of the terminal is enabled; if so, send the adapter performance to the working mode switching switch The power input end of the parameter detection circuit is connected to the switch control signal of the power output end of the adapter, and the control terminal enters the adapter performance detection mode; otherwise, a switch control is sent to the working mode switching switch to connect the power input end of the charging circuit to the power output end of the adapter signal, the control terminal enters the battery charging mode;

The charging circuit is used to charge the battery after the terminal enters the battery charging mode;

Wherein, the determining whether the adapter performance detection function of the terminal is enabled specifically includes:

If the obtained switch state is the switch state of enabling the adapter performance detection function of the terminal, it is determined that the adapter performance detection function of the terminal is enabled;

If the acquired switch state is the switch state of disabling the adapter performance detection function of the terminal, it is determined that the adapter performance detection function of the terminal is not enabled.

Preferably, the terminal also includes:

A voltage threshold setting module, configured to preset a voltage threshold;

The corresponding relationship setting module is used to pre-establish the corresponding relationship between the nominal output current and the load resistance to be loaded.

The circuit parameter input module is used for the user to input the nominal output current of the adapter to be detected.

Preferably, the voltage threshold is 0.2 volts.

Beneficial effects brought by the technical solution provided by the embodiment of the present invention: the present invention sets an adapter performance parameter detection circuit on the terminal, and when the user chooses to enter the adapter performance detection mode, the no-load voltage U1 of the adapter is respectively sampled through the adapter performance parameter detection circuit And the actual working voltage U2 at both ends of the load resistance after loading the load resistance, and according to the no-load voltage U1 and the actual working voltage U2, determine the performance of the adapter, and judge whether the performance of the adapter is qualified, which is very convenient and avoids The charging circuit of the terminal and the battery are connected to an adapter with poor performance, which shortens the battery life and other problems, which greatly improves the user's product experience.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained according to the content of the embodiment of the present invention and these drawings without any creative effort.

FIG. 1 is a functional block diagram of a terminal for intelligently detecting adapter performance provided by an embodiment of the present invention.

Fig. 2 is a flowchart of a method for intelligently detecting adapter performance provided by an embodiment of the present invention.

In the figure: 10, terminal; 11, working mode control module; 12, working mode switching switch; 13, charging circuit; 14, battery; 15, numerical processing module; 16, memory; 17, circuit parameter input module; 18, performance 19. Display screen; 20. Adapter performance parameter detection circuit; 21. Load switch; 22. Voltage sampling module; 23. Load resistance; 30. Adapter; 40. Power supply.

detailed description

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only the technical solutions of the present invention. Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to FIG. 1 . FIG. 1 is a functional block diagram of a terminal 10 for intelligently detecting adapter performance provided by an embodiment of the present invention. The terminal 10 provided by the embodiment of the present invention includes a mobile phone, an electronic book reader, an MP3 (Moving Picture Experts Group Audio Layer III, moving picture expert compression standard audio layer 3) player, an MP4 (Moving Picture Experts Group Audio Layer IV, moving picture Expert compression standard audio level 4) Players, laptops, tablets, etc.

Terminal 10 specifically includes: working mode control module 11, working mode switching switch 12, charging circuit 13, battery 14, numerical processing module 15, memory 16, circuit parameter input module 17, performance detection function switch 18, display screen 19 and adapter performance Parameter detection circuit 20.

Wherein, the adapter performance parameter detection circuit 20 includes a load switch 21 , a voltage sampling module 22 and a load resistor 23 .

Specifically, the third terminal of the working mode switching switch 12 is respectively connected to the power output terminal of the adapter and the level signal sampling terminal of the working mode control module 11 , and the third terminal of the working mode switching switch 12 is the charging interface of the terminal 10 . The first end of the working mode switch 12 is connected to the power input end of the charging circuit 13, the second end of the working mode switching switch 12 is connected to the power input end of the adapter performance parameter detection circuit 20, and the fourth end of the working mode switching switch 12 is connected to the working The control signal output terminal of the mode control module 11.

More specifically, the working mode switching switch 12 can be a relay or a contactor. For ease of understanding, the third end of the working mode switching switch 12 is a movable contact, and the first end of the working mode switching switch 12 is a normally closed contact. The second end of the changeover switch 12 is a normally open contact.

When the charging interface of the terminal 10 is connected to the power supply 40 through the adapter 30, the level signal sampling terminal of the working mode control module 11 samples a high-level signal, starts to work, and detects in real time whether the adapter performance detection function is enabled, that is, according to the performance detection The switch state of function switch 18 judges whether the adapter performance detection function is opened; If so, send the control signal of starting work to numerical processing module 15, and provide high level for the fourth end of work mode switch 12, control work mode switch 12 The movable contact of the working mode switching switch 12 and the normally open contact are connected, and the control terminal 10 works in the adapter performance parameter detection mode; otherwise, a low level is provided for the fourth end of the working mode switching switch 12 to control the switching of the working mode The movable contact of the switch 12 is connected with the normally closed contact of the working mode switching switch 12, and the control terminal 10 works in the battery charging mode. Wherein, the switch state of the performance detection function switch 18 includes a switch state of enabling the terminal adapter performance detection function and a switch state of disabling the terminal adapter performance detection function.

Among them, the performance detection function switch 18 can be implemented in a variety of ways, such as setting a switch key on the terminal 10, or a built-in switch function button in the human-computer interaction interface of the terminal 10, which is used for the user to selectively open or close the terminal 10. Adapter performance parameter detection function.

Specifically, the adapter performance parameter detection circuit 20 may include one or more load resistors 23. In this embodiment, the load resistors 23 include a first load resistor R1, a second load resistor R2, and a third load resistor R3. The first terminal of the load switch 21 is connected to the first terminal of the first load resistor R1, the second terminal of the load switch 21 is connected to the first terminal of the second load resistor R2, and the third terminal of the load switch 21 is connected to the terminal of the third load resistor R3. The first end, the second end of the first load resistor R1 , the second load resistor R2 and the third load resistor R3 are grounded. The fourth terminal of the load switch 21 is connected to the switch control signal output terminal of the numerical processing module 15, the fifth terminal of the load switch 21 is connected to the positive input terminal of the voltage sampling module 22, and the negative input terminal of the voltage sampling module 22 is grounded.

In this implementation, the load switch 21 can be implemented by a multiplex switch or a multiplexer. For easy understanding, the fifth terminal of the load switch 21 is a movable contact, and the first terminal or the second terminal or the third terminal of the load switch 21 is a static contact. The fourth terminal of the load switch 21 is a switch control terminal, which is used to control the connection or conduction of the movable contact and the corresponding static contact of the load switch 21 according to the switch control signal sent by the numerical processing module 15 .

The positive input terminal of the voltage sampling module 22 is connected to the fifth terminal of the load switch 21 , and the negative input terminal of the voltage sampling module 22 is grounded, wherein the fifth terminal of the load switch 21 is the power input terminal of the adapter performance parameter detection circuit 20 . For ease of understanding, the voltage sampling module 22 is a voltmeter or a related device for measuring voltage.

When the terminal 10 is working in the adapter performance parameter detection mode, the power input terminal of the adapter performance parameter detection circuit 20 and the power output terminal of the adapter 30 are connected, and at this time, the movable contact of the load switch 21 is not connected with any static contact , the load switch 21 is in the off state, and the voltage U1 sampled by the voltage sampling module 22 at this time is the no-load voltage of the adapter 30 .

After the numerical processing module 15 receives the control signal to start working, it starts to work, and obtains the no-load voltage U1 of the adapter obtained by sampling from the voltage sampling module 22; reads the pre-stored nominal output current and the required loaded voltage from the memory 16. The corresponding relationship between the load resistors 23; and according to the corresponding relationship and the nominal output current of the pre-input adapter 30, determine the load resistor 23 to be loaded; send the switch to connect the determined load resistor 23 to the load switch 21 control signal.

After the load switch 21 receives the switch control signal sent by the numerical processing module 15, the movable contact of the load switch 21 is controlled to connect the static contact connected to the first end of the determined load resistor 23, so that the adapter is the determined The load resistor 23 supplies power. After the load resistor 23 is powered on, the voltage sampling module 22 samples to obtain the actual working voltage U2 at both ends of the load resistor 23 after the load resistor 23 is powered on.

Numerical processing module 15 obtains the actual operating voltage U2 at both ends of the load resistance 23 that is obtained after sampling from voltage sampling module 22; Judge whether the value of U1-U2 is less than or equal to the preset voltage threshold; If so, send display adapter performance to display screen 19 If the control signal is qualified; otherwise, send a control signal indicating that the performance of the adapter is unqualified to the display screen 19 .

Adapters on the market mainly include adapters with a nominal output current of 1A (ampere), adapters with a nominal output current of 1.5A, and adapters with a nominal output current of 2A, which are used in different charging scenarios. For example, mobile phones generally use Adapters with a nominal output current of 1A, while tablet computers generally use adapters with a nominal output current of 2A. In different charging scenarios, the resistance value of the terminal 10 is different when charging. The load resistance 23 of an adapter with a nominal output current of 1A is preset to 5 ohms, and the load resistance of an adapter with a nominal output current of 1.5A is preset. is 3.33 ohms, and the load resistance 23 of an adapter with a nominal output current of 2A is 2.5 ohms.

In this embodiment, the first load resistor R1 is a 5 ohm resistor, the second load resistor R2 is a 3.33 ohm resistor, the third load resistor R3 is a 2.5 ohm resistor, and the voltage threshold is 0.2 volts.

Specifically, if the nominal output current of the adapter is 1A, and the terminal 10 is working in the adapter performance parameter detection mode, the load switch 21 controls the movable contact of the load switch 21 to connect to the first terminal connected to the first load resistor R1. Static contacts. Numerical processing module 15 obtains and samples from voltage sampling module 22 and obtains no-load voltage U1 and the actual working voltage U2 of both ends after the first load resistance R1 is energized respectively; Judging whether the value of U1-U2 is less than or equal to 0.2 volts; If so, to display screen 19 Send a control signal indicating that the performance of the display adapter is qualified; otherwise, send a control signal indicating that the performance of the display adapter is unqualified to the display screen 19 .

The display screen 19 is used to display the notification information of the unqualified performance of the adapter on the display screen of the terminal if the control signal of the unqualified performance of the display adapter is received; Notification message that the adapter performance is qualified.

In addition, the numerical processing module 15 is also used to calculate the line loss power and internal resistance of the adapter 30 according to U1, U2 and the resistance value of the loaded load resistor 23, and send them to the display screen 19; To the line loss power, the line loss power and internal resistance of the adapter 30 are displayed.

Specifically, when the terminal 10 works in the battery charging mode, the power output end of the adapter 30 and the power input end of the charging circuit 13 are connected, and the adapter 30 charges the battery 14 .

It should be noted that, in this embodiment, since the adapter 30 has a certain internal resistance R when charging the terminal 30 , the _internal resistance R is the line resistance _of the adapter 30 . When the terminal 10 is charged through the adapter 30, the charging circuit 13 and the battery 14 of the terminal 10 are equivalent to electric equipment, which is equivalent to a load with a certain resistance value, and the load with a certain resistance value is defined as a charging resistance, and the charging The resistance value of the resistor can be obtained through measurement. Assuming that when the terminal is charging, the resistance value of the charging resistor is R _load , through the relationship It can be seen that when the R _load is constant, the value of U1-U2 is proportional _to the size of R, therefore, the smaller the value of U1-U2, _the smaller the R, and the better the performance of the adapter 30. Therefore, the performance of the adapter can be judged by detecting the values of U1-U2. In addition, the internal resistance R _{of the} adapter 30 and the line loss power of the adapter 30 can also be calculated. The present invention can determine the performance of the adapter 30 only according to the no-load voltage U1 and the actual working voltage U2, and the method of sampling the no-load voltage U1 and the actual working voltage U2 is also very convenient, wherein the numerical processing module 15 can use the terminal 10 CPU, so the implementation of this program only needs to add a few switching elements and resistors, without the need to set up complex electronic circuits on the terminal 10, the cost is relatively low, and it does not have much impact on the layout of the PCB of the terminal 10; The adapter used only needs performance testing, which greatly improves the user's product experience.

Please refer to FIG. 2 . FIG. 2 is a flowchart of a method for intelligently detecting adapter performance provided by an embodiment of the present invention. The methods include:

S100. Preliminarily establish a corresponding relationship between the nominal output current and the load resistance to be loaded.

This step is a preset step. In different application scenarios, the charging voltage and operating current of the terminal 10 when the adapters 30 with different nominal output currents correspond to different terminals 10 are respectively measured, and the calculation shows that different terminals 10 correspond to different adapters 30 The charging resistance is used to establish a corresponding relationship between a nominal output current and the load resistance 23 that needs to be loaded. The resistance value of the load resistor 23 is obtained by calculating the corresponding relationship and the nominal output current of the adapter, and then the corresponding load resistor 23 to be loaded is known.

S101, pre-input the nominal output current of the adapter 30 to be detected.

When the user needs to check whether the performance of the adapter 30 meets the requirements, the nominal output current of the adapter 30 to be tested can be input through the circuit parameter input module 17 of the terminal 10 .

S102 , the terminal 10 connects to the power supply 40 through the adapter 30 .

After the nominal output current is input, the charging interface of the terminal 10 can be connected to the power output end of the adapter 30 through the power line or data line, and at the same time, the power input end of the adapter 30 is connected to the power supply 40, wherein the power supply 40 provides 220-volt AC power.

S110. Detect whether the adapter performance detection function of the terminal 10 is enabled; if yes, go to step S140; otherwise, go to step S120.

After the charging interface of the terminal 10 is connected to the power supply 40 through the adapter 30, the level signal sampling terminal of the working mode control module 11 samples a high-level signal and starts to work, and detects in real time whether the adapter performance detection function is turned on. The processing module 15 sends a control signal to start working, and controls the movable contact of the working mode switching switch 12 and the normally open contact of the working mode switching switch 12 to be connected, and the control terminal 10 works in the adapter performance parameter detection mode; otherwise, the control work The movable contact of the mode switching switch 12 and the normally closed contact of the working mode switching switch 12 are connected, and the control terminal 10 works in the battery charging mode.

S120, the control terminal 10 enters the battery charging mode.

Specifically, when the terminal 10 works in the battery charging mode, the power output terminal of the control adapter 30 and the power input terminal of the charging circuit 13 are connected.

S130, charging the battery of the terminal 10.

After the power output end of the adapter 30 and the power input end of the charging circuit 13 are connected, the adapter 30 supplies power to the charging circuit 13 , and then charges the battery 14 .

S140. The control terminal enters the adapter performance detection mode;

When the terminal 10 works in the adapter performance parameter detection mode, the power input terminal of the adapter performance parameter detection circuit 20 and the power output terminal of the adapter 30 are connected.

S150 , sampling to obtain the no-load voltage U1 of the adapter 30 .

After the power input terminal of the adapter performance parameter detection circuit 20 and the power output terminal of the adapter 30 are connected, at this time, the movable contact of the load switch 21 is not connected with any static contact, the load switch 21 is in the off state, and the voltage The voltage U1 sampled by the sampling module 22 at this time is the no-load voltage of the adapter 30 .

S160. Read the correspondence between the pre-stored nominal output current and the load resistance 23 to be loaded from the memory 16 .

After the numerical processing module 15 receives the control signal to start working, it starts working, and after obtaining the no-load voltage U1 of the adapter 30 sampled from the voltage sampling module 22, it reads the pre-stored nominal output current and Correspondence between load resistors 23 to be loaded.

S170. Determine the resistance value of the load resistor 23 to be loaded according to the corresponding relationship and the pre-input nominal output current of the adapter.

The numerical processing module 15 determines the load resistance 23 to be loaded according to the corresponding relationship and the pre-input nominal output current of the adapter 30 ; and sends a switch control signal to the load switch 21 to turn on the determined load resistance 23 .

S180. Connect the power output terminal of the adapter to the load resistor 23 corresponding to the determined resistance value to supply power to the load resistor.

After the load switch 21 receives the switch control signal sent by the numerical processing module 15, the movable contact of the load switch 21 is controlled to connect the static contact connected to the first end of the determined load resistor 23, so that the adapter is the determined The load resistor 23 supplies power.

S190. Sampling and obtaining the actual working voltage U2 at both ends of the load resistor after being energized.

After the load resistor 23 is powered on, the voltage sampling module 22 samples to obtain the actual working voltage U2 at both ends of the load resistor 23 after the load resistor 23 is powered on.

S200. Determine whether the value of U1-U2 is less than or equal to a preset voltage threshold; if yes, go to step S210; otherwise, go to step S220.

Numerical processing module 15 obtains the actual operating voltage U2 at both ends of the load resistance 23 that is obtained after sampling from voltage sampling module 22; Judge whether the value of U1-U2 is less than or equal to the preset voltage threshold; If so, send display adapter performance to display screen 19 If the control signal is qualified, go to step S210; otherwise, send a control signal indicating that the performance of the display adapter is unqualified to the display screen 19, and go to step S220.

S210. Display a notification message that the performance of the adapter is qualified on the display screen 19 of the terminal 10.

If the display screen 19 receives the control signal indicating that the performance of the adapter is qualified, it will immediately display a notification message that the performance of the adapter is qualified on the display screen 19 .

S220. Display a notification message that the performance of the adapter is unqualified on the display screen 19 of the terminal 10.

If the display screen 19 receives the control signal indicating that the performance of the adapter is qualified, it will immediately display a notification message that the performance of the adapter is unqualified on the display screen 19 .

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned embodiments can be completed by hardware, and can also be completed by instructing related hardware through a program. The program can be stored in a computer-readable storage medium, and the storage medium can include Memory 16, magnetic disk or optical disk, etc.

It can be understood that the order of the steps in the above method is not fixed, and the exchange of the order of the steps in the basic idea of the present invention should be within the protection scope of the present invention.

In this embodiment, after step S190, step S230 is further included.

S230 , according to the resistance value of U1 , U2 and the loaded load resistance 23 , calculate the resistance value of the internal resistance of the adapter 30 and the line loss power during operation, and send it to the display screen 19 .

The numerical processing module 15 is also used to calculate the resistance value of the internal resistance of the adapter 30 and the line loss power during operation according to the resistance value of U1, U2 and the loaded load resistance 23, as follows:

When the terminal 10 is charged by the adapter 30, if the resistance value of the load resistor 23 is R _{load 1} , the relationship It can be known that when the R _{loads 1} , U1, and U2 are constant, the internal resistance R _{of the} adapter 30 can be calculated, and the power loss of the line when the adapter 30 is working is When R _is known, W _{load 1} can also be known by calculation.

S240, displaying the resistance value of the internal resistance of the adapter 30 and the line loss power during operation on the display screen 19 of the terminal 10.

If the display screen receives the resistance value of the internal resistance of the adapter 30 and the line loss power during operation sent by the numerical processing module 15, the resistance value of the internal resistance of the adapter 30 and the line loss power during operation are displayed on the display screen 19.

The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. limits.

Claims (15)

1. A method for intelligently detecting adapter performance, comprising: The terminal is connected to the power supply through the adapter; In the adapter performance detection mode, the no-load voltage U1 of the adapter and the actual working voltage U2 at both ends of the load resistance after the load resistance is loaded at the power supply output end of the adapter are respectively obtained by sampling; According to the no-load voltage U1 and the actual working voltage U2, the performance of the adapter is determined. 2. The method according to claim 1, characterized in that, the step: in the adapter performance detection mode, respectively sample the no-load voltage U1 of the adapter and the voltage U1 after the load resistance is loaded on the power supply output end of the adapter The actual working voltage U2 at both ends of the load resistor specifically includes: After the terminal enters the adapter performance detection mode, the no-load voltage U1 of the adapter is obtained by sampling; Read the correspondence between the pre-established nominal output current and the load resistance required to be loaded from the memory; According to the corresponding relationship and the pre-input nominal output current of the adapter, determine the load resistance to be loaded; Controlling the power output terminal of the adapter to connect to a determined load resistance, so as to energize the load resistance; The actual working voltage U2 at both ends of the load resistor is obtained by sampling. 3. The method according to claim 1, wherein the step: determining the performance of the adapter according to the no-load voltage U1 and the actual working voltage U2, specifically comprising: Judging whether the value of U1-U2 is less than or equal to a preset voltage threshold; If so, determine that the performance of the adapter is qualified, and display a notification message that the performance of the adapter is qualified on the display screen of the terminal; Otherwise, it is determined that the performance of the adapter is unqualified, and a notification message that the performance of the adapter is unqualified is displayed on the display screen of the terminal. 4. The method according to claim 1, wherein the step: determining the performance of the adapter according to the no-load voltage U1 and the actual working voltage U2, specifically comprising: Calculate and obtain the resistance value of the internal resistance of the adapter according to U1, U2 and the resistance value of the loaded load resistance; The resistance value of the internal resistance of the adapter is displayed on the display screen of the terminal. 5. The method according to claim 1, characterized in that, the step: after the terminal is connected to the power supply through the adapter, further comprising: Detect whether the adapter performance detection function of the terminal is enabled; If so, the control terminal enters the adapter performance detection mode; Otherwise, the control terminal enters the battery charging mode. 6. The method according to claim 5, characterized in that, the step: after controlling the terminal to enter the battery charging mode, further comprising: Charge the battery of the terminal. 7. The method according to any one of claims 1 to 6, characterized in that the step: before the terminal connects to the power supply through the adapter, further includes: preset a voltage threshold; Pre-establish the correspondence between the nominal output current and the load resistance required to be loaded; storing the corresponding relationship and the voltage threshold in a memory of the terminal. 8. The method according to any one of claims 1 to 6, characterized in that the step: before the terminal is connected to a power supply through an adapter, further includes: Input the nominal output current of the adapter to be tested in advance. 9. A terminal for intelligently detecting adapter performance, comprising: The adapter performance parameter detection circuit is used to respectively sample the no-load voltage U1 of the adapter and load the load resistance at the power output end of the adapter when the terminal is connected to the power supply through the adapter and works in the adapter performance detection mode The actual working voltage U2 at both ends of the load resistance, and send the sampled U1 and U2 to the numerical processing module of the terminal; A numerical processing module, configured to determine the performance of the adapter according to the no-load voltage U1 and the actual working voltage U2. 10. The terminal according to claim 9, further comprising a working mode switching switch, a memory, and a current parameter input module; The working mode switching switch is used to connect the power input end of the adapter performance parameter detection circuit to the power output end of the adapter after the terminal enters the adapter performance detection mode; The current parameter input module is used for the user to input the nominal output current of the adapter to be detected; The memory is used to store the correspondence between the pre-established nominal output current and the load resistance to be loaded, and the nominal output current of the adapter input by the user through the current parameter input module; The adapter performance parameter detection circuit includes a load switch, a load resistor and a voltage sampling module; The voltage sampling module is used to sample the no-load voltage U1 of the adapter after the terminal enters the adapter performance detection mode, and send it to the numerical processing module; The numerical processing module is also used to read the corresponding relationship and the nominal output current of the adapter input by the user from the memory after receiving the no-load voltage U1 sent by the voltage sampling module; The corresponding relationship and the nominal output current determine the load resistance to be loaded; and are also used to send a switch control signal to the load switch to turn on the determined load resistance after the load resistance to be loaded is determined; The load switch is used to control the power output terminal of the adapter to connect to a certain load resistance after receiving the switch control signal, so as to energize the load resistance; The voltage sampling module is also used to sample the actual working voltage U2 at both ends of the load resistor after the load resistor is powered on, and send it to the value processing module. 11. The terminal according to claim 9, further comprising a display screen; The determining the performance of the adapter according to the no-load voltage U1 and the actual working voltage U2 specifically includes: The numerical processing module judges whether the value of U1-U2 is less than or equal to a preset voltage threshold; if so, it determines that the performance of the adapter is qualified, and sends a control signal indicating that the performance of the adapter is qualified to the display screen of the terminal; otherwise, it determines that the performance of the adapter is unqualified , sending a control signal indicating that the performance of the display adapter is unqualified to the display screen of the terminal; The display screen is used to display the notification information of the qualified performance of the adapter on the display screen of the terminal if the control signal of the qualified performance of the display adapter is received; The notification message that the performance of the adapter is unqualified is displayed on the screen. 12. The terminal according to claim 9, wherein the determining the performance of the adapter according to the no-load voltage U1 and the actual working voltage U2 specifically includes: The numerical processing module calculates the resistance value of the internal resistance of the adapter according to U1, U2 and the resistance value of the loaded load resistance, and sends it to the display screen; The display screen is also used to display the resistance value of the adapter's internal resistance if the calculated resistance value of the adapter's internal resistance is received. 13. The terminal according to claim 9, further comprising a performance detection function switch, a working mode control module, a charging circuit and a battery; The performance detection function switch is used to enable or disable the adapter performance detection function of the terminal; wherein, the switch state of the performance detection function switch includes the switch state of enabling the adapter performance detection function of the terminal and the switch of disabling the adapter performance detection function of the terminal state; The working mode control module is also used to obtain the switching state of the performance detection function switch after the power supply is connected through the adapter, and judge whether the adapter performance detection function of the terminal is enabled; if so, send the adapter performance to the working mode switching switch The power input end of the parameter detection circuit is connected to the switch control signal of the power output end of the adapter, and the control terminal enters the adapter performance detection mode; otherwise, a switch control is sent to the working mode switching switch to connect the power input end of the charging circuit to the power output end of the adapter signal, the control terminal enters the battery charging mode; The charging circuit is used to charge the battery after the terminal enters the battery charging mode; Wherein, the determining whether the adapter performance detection function of the terminal is enabled specifically includes: If the obtained switch state is the switch state of enabling the adapter performance detection function of the terminal, it is determined that the adapter performance detection function of the terminal is enabled; If the acquired switch state is the switch state of disabling the adapter performance detection function of the terminal, it is determined that the adapter performance detection function of the terminal is not enabled. 14. The terminal according to any one of claims 9 to 13, further comprising: A voltage threshold setting module, configured to preset a voltage threshold; The corresponding relationship setting module is used to pre-establish the corresponding relationship between the nominal output current and the load resistance to be loaded. The circuit parameter input module is used for the user to input the nominal output current of the adapter to be detected. 15. The terminal according to claim 14, wherein the voltage threshold is 0.2 volts.