阅读说明：本技术 测试ping电流的方法、相应的测试ping电流的电路及其应用 (Method for testing PING current, corresponding circuit for testing PING current and application thereof ) 是由 吴建新 范卫平 王珂 于 2019-10-08 设计创作，主要内容包括：本发明涉及一种测试PING电流的方法、相应的测试PING电流的电路及其应用,其中,采用所述的方法,可通过求取待测电路输出的电流中电流值大于门限值的电流的平均值,以得到所述的待测电路输出的PING电流的平均电流值。相应的电路在测试过程中无需高级的示波器,通过简单的电路即可完成测试,同时对测试人员没有技术方面的要求,整个操作过程十分简便,可以非常容易地获取待测电路输出的PING电流的平均电流值。采用本发明的测试PING电流的方法、相应的测试PING电流的电路及其应用,可大大减小了测试对于人员的依赖,有效提高PING电流的测试效率,同时有效节约测试成本。(The invention relates to a method for testing PING current, a corresponding circuit for testing PING current and application thereof, wherein by adopting the method, the average value of the current with the current value larger than a threshold value in the current output by a circuit to be tested can be obtained by calculating the average value of the current output by the circuit to be tested. The corresponding circuit does not need a high-level oscilloscope in the test process, the test can be completed through a simple circuit, meanwhile, the technical requirements on testers do not exist, the whole operation process is very simple and convenient, and the average current value of the PING current output by the circuit to be tested can be very easily obtained. By adopting the method for testing the PING current, the corresponding circuit for testing the PING current and the application thereof, the dependence of the test on personnel can be greatly reduced, the testing efficiency of the PING current is effectively improved, and the testing cost is effectively saved.)

1. A method for testing PING current, characterized in that the method comprises:

and solving the average value of the currents with the current values larger than the threshold value in the currents output by the circuit to be tested so as to obtain the average current value of the PING current output by the circuit to be tested, wherein the threshold value is equal to n times of the average value of the currents output by the circuit to be tested, and n is a system preset value.

2. The method as claimed in claim 1, wherein the step of averaging the currents with the current value greater than the threshold value from the currents output by the circuit under test to obtain the average current value of the PING current output by the circuit under test comprises the steps of:

(1) measuring the current output by the circuit to be measured;

(2) calculating the average value of the current output by the circuit to be tested, multiplying the average value of the current output by the circuit to be tested by a system preset value n, and determining the threshold value;

(3) and calculating the average value of the currents with the current values larger than the threshold value in the currents output by the circuit to be tested to obtain the average current value of the PING current output by the circuit to be tested.

3. A method of testing PING current according to claim 2, wherein step (1) is preceded by the steps of:

and (0.1) providing stable voltage for the circuit to be tested.

4. A method for testing PING current according to claim 2, further comprising the step of, between step (1) and step (2):

and (1.1) continuously reading the current output by the circuit to be tested in a preset time period.

5. A method for testing PING current according to claim 2, further comprising the step of, between step (2) and step (3):

and (2.1) comparing the current output by the circuit to be tested with the threshold value to obtain the current of which the current value is greater than the threshold value in the current output by the circuit to be tested.

6. A circuit for testing PING current is characterized in that the circuit for testing PING current comprises a main control module, a power supply, a measuring module and a circuit to be tested;

the main control module controls the power supply and the measuring module to supply power to the circuit to be tested, and the main control module obtains the current output by the circuit to be tested through the power supply and the measuring module and obtains the average current value of the PING current output by the circuit to be tested through analyzing the current output by the circuit to be tested.

7. The circuit for testing PING current of claim 6, wherein the power supply and measurement module comprises a power supply unit and a measurement unit;

the main control module controls the power supply unit to supply power to the circuit to be tested, and the main control module obtains the current output by the circuit to be tested through the measuring unit.

8. The circuit for testing PING current of claim 6, wherein the power supply and measurement module comprises a programmable power supply with data reading capability.

9. The circuit for testing PING current of claim 6, wherein the master control module is comprised of an upper computer.

10. A method for implementing a PING current test based on the PING current test circuit of claim 6, the method comprising:

(a1) the main control module controls the power supply and the measuring module to provide stable voltage for the circuit to be measured;

(a2) the power supply and measurement module measures the current output by the circuit to be measured;

(a3) the main control module continuously reads the current output by the circuit to be tested in a preset time period through the power supply and the measuring module;

(a4) the main control module calculates the average value of the current output by the circuit to be tested, and multiplies the average value of the current output by the circuit to be tested by a system preset value n to determine the threshold value;

(a5) the main control module compares the current output by the circuit to be tested with the threshold value to obtain the current of which the current value is greater than the threshold value in the current output by the circuit to be tested;

(a6) and the main control module calculates the average value of the currents with the current values larger than the threshold value in the currents output by the circuit to be tested to obtain the average current value of the PING current output by the circuit to be tested.

Technical Field

The invention relates to the field of electricity, in particular to the field of measurement of electrical parameters, and particularly relates to a method for testing PING current, a corresponding circuit for testing PING current and application of the circuit.

Background

PING current is a key indicator for the system, and this data is needed for marketing and various certifications; this value is typically measured during operation to facilitate software and hardware personnel to optimize, depending on the situation, to reduce the magnitude of the PING signal to reduce the standby power consumption of the system. The PING current has short duration and stable amplitude, and has obvious difference compared with the current in other working states in the system.

In the prior art, a relatively high-grade oscilloscope is generally adopted to test the PING current in the system through a current probe, and although the testing method can realize the testing of the PING current, the testing method has higher requirements corresponding to professional literacy of testers and equipment, and specifically comprises the following steps:

1) the requirement on a tester is high, and the oscilloscope needs to be used skillfully;

2) a relatively sophisticated oscilloscope and a precision current probe are required, which are relatively expensive.

For the two reasons, the feasibility of testing the PING current is limited.

Disclosure of Invention

The present invention is directed to overcoming at least one of the above-mentioned disadvantages of the prior art and providing a method for testing PING current, a corresponding circuit for testing PING current and applications thereof, which is easy to implement, easy to operate and does not require high testing costs.

To achieve the above and other objects, the present invention provides a method for testing PING current, a corresponding circuit for testing PING current and its application as follows:

the method for testing the PING current is mainly characterized by comprising the following steps:

and solving the average value of the currents with the current values larger than the threshold value in the currents output by the circuit to be tested so as to obtain the average current value of the PING current output by the circuit to be tested, wherein the threshold value is equal to n times of the average value of the currents output by the circuit to be tested, and n is a system preset value.

Preferably, the calculating an average value of currents with current values larger than a threshold value in the currents output by the circuit to be tested to obtain an average current value of the PING current output by the circuit to be tested includes the following steps:

(1) measuring the current output by the circuit to be measured;

(2) calculating the average value of the current output by the circuit to be tested, multiplying the average value of the current output by the circuit to be tested by a system preset value n, and determining the threshold value;

(3) and calculating the current value in the current output by the circuit to be tested to be larger than the threshold value to obtain the average current value of the PING current output by the circuit to be tested.

More preferably, the step (1) further comprises the following steps:

and (0.1) providing stable voltage for the circuit to be tested.

More preferably, the following steps are further included between step (1) and step (2):

and (1.1) continuously reading the current output by the circuit to be tested in a preset time period.

More preferably, the following steps are further included between step (2) and step (3):

and (2.1) comparing the current output by the circuit to be tested with the threshold value to obtain the current of which the current value is greater than the threshold value in the current output by the circuit to be tested.

A circuit for testing PING current is mainly characterized in that the circuit for testing PING current comprises a main control module, a power supply, a measuring module and a circuit to be tested;

the main control module controls the power supply and the measuring module to supply power to the circuit to be tested, and the main control module obtains the current output by the circuit to be tested through the power supply and the measuring module and obtains the average current value of the PING current output by the circuit to be tested through analyzing the current output by the circuit to be tested.

Preferably, the power supply and measurement module comprises a power supply unit and a measurement unit;

the main control module controls the power supply unit to supply power to the circuit to be tested, and the main control module obtains the current output by the circuit to be tested through the measuring unit.

Preferably, the power supply and measurement module is composed of a programmable power supply with a data reading function.

Preferably, the main control module is composed of an upper computer.

A method for realizing PING current testing based on the circuit for testing PING current is mainly characterized in that the method comprises the following steps:

(a1) the main control module controls the power supply and the measuring module to provide stable voltage for the circuit to be measured;

(a2) the power supply and measurement module measures the current output by the circuit to be measured;

(a3) the main control module continuously reads the current output by the circuit to be tested in a preset time period through the power supply and the measuring module;

(a4) the main control module calculates the average value of the current output by the circuit to be tested, and multiplies the average value of the current output by the circuit to be tested by a system preset value n to determine the threshold value;

(a5) the main control module compares the current output by the circuit to be tested with the threshold value to obtain the current of which the current value is greater than the threshold value in the current output by the circuit to be tested;

(a6) and the main control module calculates the average value of the currents with the current values larger than the threshold value in the currents output by the circuit to be tested to obtain the average current value of the PING current output by the circuit to be tested.

By adopting the method for testing the PING current, the corresponding circuit for testing the PING current and the application thereof, the average current value of the PING current output by the circuit to be tested is obtained by calculating the average value of the currents with the current values larger than the threshold value in the currents output by the circuit to be tested. The testing process does not need a high-grade oscilloscope, the testing can be completed through a simple circuit, the testing cost is effectively saved, meanwhile, the technical requirements on testers do not exist, the whole operation process is very simple and convenient, the average current value of the PING current output by the circuit to be tested can be very easily obtained, the dependence of the testing on the personnel is greatly reduced, and the testing efficiency of the PING current is effectively improved.

Drawings

Fig. 1 is a block diagram of a circuit for testing PING current in an embodiment of the invention.

FIG. 2 is a diagram illustrating a current output by a circuit under test during a standby condition for a period of time according to an embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to specific embodiments.

The method for testing the PING current comprises the following steps:

the method comprises the following steps of calculating the average value of currents with the current value larger than a threshold value in the currents output by a circuit to be tested so as to obtain the average current value of the PING current output by the circuit to be tested, wherein the threshold value is equal to n times of the average value of the currents output by the circuit to be tested, and n is a system preset value:

(0.1) providing stable voltage for the circuit to be tested;

(1) measuring the current output by the circuit to be measured;

(1.1) continuously reading the current output by the circuit to be tested within a preset time period;

(2) calculating the average value of the current output by the circuit to be tested, multiplying the average value of the current output by the circuit to be tested by a system preset value n, and determining the threshold value;

(2.1) comparing the current output by the circuit to be tested with the threshold value to obtain the current of which the current value is greater than the threshold value in the current output by the circuit to be tested;

(3) and calculating the average value of the currents with the current values larger than the threshold value in the currents output by the circuit to be tested to obtain the average current value of the PING current output by the circuit to be tested.

In the testing process, the system preset value n is generally selected to be 1.5 to 5, that is, the threshold value is generally selected to be 1.5 times to 5 times of the average value of the current output by the circuit to be tested, and preferably 2 times of the average value of the current output by the circuit to be tested.

In one embodiment, a circuit for implementing the method is provided, and the circuit for testing the PING current comprises a main control module, a power supply, a measuring module and a circuit to be tested;

the main control module controls the power supply and the measuring module to supply power to the circuit to be tested, and the main control module obtains the current output by the circuit to be tested through the power supply and the measuring module and obtains the average current value of the PING current output by the circuit to be tested through analyzing the current output by the circuit to be tested.

The power supply and measurement module can be composed of a power supply unit and a measurement unit (the measurement unit can be formed by a current acquisition card in the prior art), or a programmable power supply with a data reading function can be selected to form the power supply and measurement module.

If the power supply and the measuring module formed by the power supply unit and the measuring unit are selected, the main control module controls the power supply unit to supply power to the circuit to be measured, and the main control module obtains the current output by the circuit to be measured through the measuring unit.

When the selected programmable power supply does not have the data reading function, the current output by the circuit to be tested can be tested by adopting a measuring unit consisting of a current acquisition card, the current information output by the circuit to be tested is reflected to the main control module in real time, and the main control module carries out final processing on the current information so as to obtain the average current value of the PING current.

In this embodiment, a programmable power supply with a data reading function is selected to form the power supply and the measurement module.

The programmable power supply is used for providing specified direct current voltage (for example, 5V voltage) for the circuit to be tested under the control of the upper computer and feeding back current information output by the current circuit to be tested.

The programmable power supply with data reading function in the prior art can display the currently output voltage and current information, that is, the voltage and current information provided to the circuit to be tested, on its operation interface (since the programmable power supply is connected in series with the circuit to be tested, the current information displayed on the programmable power supply is the current information output by the circuit to be tested). The tester can see the corresponding information in the display module of the programmable power supply. This is a common function of most programmable power supplies. The programmable power supply provides an interface that can be accessed using an upper computer. The power supply which provides an interface and can read information through an upper computer is used in the embodiment. Such power supplies are also currently common, being on the order of thousands of dollars in price, and are relatively inexpensive and less prone to damage than the tens of thousands of power probes used in advanced oscilloscopes.

In this embodiment, the main control module is composed of an upper computer, and the upper computer may be composed of a general PC or other control device that performs a corresponding control function, and is configured to control the programmable power supply and read information output by the programmable power supply.

The specific circuit diagram can be seen in fig. 1, and the test upper computer in the diagram is the upper computer.

The method for testing the PING current by the circuit for testing the PING current comprises the following steps:

(a1) the main control module controls the power supply and the measuring module to provide stable voltage for the circuit to be measured;

(a2) the power supply and measurement module measures the current output by the circuit to be measured;

(a3) the main control module continuously reads the current output by the circuit to be tested in a preset time period through the power supply and the measuring module;

(a4) the main control module calculates the average value of the current output by the circuit to be tested, and multiplies the average value of the current output by the circuit to be tested by a system preset value n to determine the threshold value;

(a5) the main control module compares the current output by the circuit to be tested with the threshold value to obtain the current of which the current value is greater than the threshold value in the current output by the circuit to be tested;

(a6) and the main control module calculates the average value of the currents with the current values larger than the threshold value in the currents output by the circuit to be tested to obtain the average current value of the PING current output by the circuit to be tested.

The method for testing the PING current, the corresponding circuit for testing the PING current and the application of the circuit for testing the PING current in the embodiment can also calculate the average value of the PING current under the condition that an oscilloscope and a current probe are not needed, so that the cost can be effectively saved, and the testing efficiency can be improved.

For better understanding, the circuit in the above embodiment is taken as an example, and a specific test example is taken for illustration:

(1) the upper computer controls the programmable power supply to continuously output constant 5V voltage to the circuit to be tested;

(2) the programmable power supply continuously reads the output current of the circuit to be tested and transmits the corresponding test result to the upper computer;

(3) the upper computer selects the current output by the circuit to be tested within a preset time (such as 1 minute) for analysis;

(5) calculating the average value of the current output by the circuit to be tested within a preset time (such as 1 minute);

(6) and finding out points with output current being 2 times of the average current value from the current output by the circuit to be tested within a preset time (such as 1 minute), and averaging the current values of the points to obtain the average current value of the PING current output by the circuit to be tested within the preset time (since the amplitude of the PING current is generally stable, the obtained average current value of the PING current can be regarded as the value of the PING current).

In the standby condition of the system, the output current can be referred to as fig. 2, the part with the higher amplitude in fig. 2 shows the current value of the PING current in the current output by the circuit to be tested, and the part with the lower amplitude shows the current value of the current output by the circuit to be tested, which is not the PING current (mainly for representing the presentation form of the PING current in fig. 2, the current value of 3 total currents in the current output by the circuit to be tested is drawn in the figure and is greater than the threshold value, but the actual test condition is not limited to this), as can be seen from fig. 2, the current output in the general condition is maintained at a relatively lower level, and when the PING current occurs, the current is suddenly increased and maintained at an amplitude for a period of time, and the duration is relatively short. The method for testing the PING current, the corresponding circuit for testing the PING current and the application thereof are designed based on characteristics and are used for solving the average value of the PING current output by a system.

In a system, PING current is a relatively large signal, for example, up to several tens of milliamperes, and the average current of the overall output of the circuit is on the order of several milliamperes. According to practice and test comparison, when the threshold value is selected to be 2 times of the average value of the current output by the circuit to be tested, the test results obtained in time and amplitude are consistent with the test result obtained by the oscilloscope. If the judgment is performed by using the judgment condition which is only larger than the average current, the judgment result is affected by some glitches, and therefore, in this embodiment, the judgment condition is selected to be 2 times of the average current. Of course, in other embodiments, a judgment condition around 2 times or slightly higher than 2 times may be used as the selection threshold.

The current value of the PING current is a key index for the system, and the data is needed for the system to market and to be certified. Software and hardware personnel can correspondingly optimize the circuit according to the test result of the average value of the PING current, reduce the amplitude of the PING signal under the condition of ensuring the PING signal to be useful so as to reduce the standby power consumption of the system, and meanwhile, in the process of testing a production line, the average value of the PING current can be calculated through the test method and the test circuit in the embodiment so as to judge whether the circuit to be tested meets the standard or not.

Because the power supply is an indispensable device in the process of testing the PING current in the prior art, the testing method and the corresponding circuit in the invention are equivalent to no additional equipment in the testing process, and an oscilloscope and a current probe which are needed in the prior art are not needed, so that the testing cost is effectively saved.

By adopting the method for testing the PING current, the corresponding circuit for testing the PING current and the application thereof, the average value of the current at the point of which the current value is greater than the preset multiple of the average value of the current output by the circuit to be tested in the current output by the circuit to be tested is obtained, so that the average current value of the PING current output by the circuit to be tested is obtained. The testing process does not need a high-grade oscilloscope, the testing can be completed through a simple circuit, the testing cost is effectively saved, meanwhile, the technical requirements on testers do not exist, the whole operation process is very simple and convenient, the average current value of the PING current output by the circuit to be tested can be very easily obtained, the dependence of the testing on the personnel is greatly reduced, and the testing efficiency of the PING current is effectively improved.

In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.