CN100406899C - A power simulation device for testing - Google Patents

Abstract

The present invention relates to a power simulation device for testing, the device includes an abnormal simulation control module, wherein the device also includes a main control module, the main control module is used to control the abnormal simulation control module and Provide various combinations of abnormal analog control modules; the primary power is input to the corresponding abnormal analog control module, and under the control of the main control module, the abnormal analog control module processes the input primary power and outputs the secondary power to system under test. The multi-power supply combination abnormality and tolerance test device of the present invention is a test tool with multiple power supply outputs, capable of simulating power supply abnormalities and combined control of multi-channel power supply abnormalities, and is used for the stability and fault tolerance of the hardware system. Limit test to verify the tolerance of the system circuit to the discrete performance of the board's power supply system and the stability and security of the hardware system when multiple or multiple abnormal phenomena occur at the same time for each power supply.

Description

A power simulation device for testing

technical field

The invention relates to a power supply system testing technology, in particular to a power simulation device for testing.

Background technique

In a communication system, since various chips have different requirements for power supply specifications, multiple different power supplies are used on the same single board to meet the requirements of various chips. In order to ensure the safe and stable operation of the communication system, it is very important to test the various power supplies mentioned above. It has a very large impact on the stability and security of the communication system, so it is more difficult to test the power supply.

In the existing testing technology, the abnormal simulation test can only be performed on the communication system loaded with a single power supply, such as simulating the slowness of power-on or power-off, and simulating the undervoltage or overvoltage.

Obviously, there are many shortcomings in the above-mentioned prior art, mainly comprising:

1. Although it is possible to conduct a simulation test on a single power supply, it is impossible to test multiple power supplies at the same time;

2. Since only one power supply is fault simulated, it is impossible to test items that require multiple power supplies to act at the same time or have abnormal changes at the same time, such as partial power failure of the system under test, local overvoltage and undervoltage anomalies, and power-on sequence anomalies. ;

3. There is no function of testing the real-time voltage or current of the secondary power supply and the function of simulating the sudden change of the load of the system under test;

4. Only the abnormal simulation of a single power supply is realized, so the test efficiency is extremely low in the test for multi-power supply systems.

technical content

The invention provides a power supply simulation device for testing, so as to overcome the shortcoming that the existing testing technology cannot simultaneously load multiple power supplies for testing.

In order to solve the above problems, the present invention provides the following technical solutions:

A power simulation device for testing, comprising: a plurality of abnormal simulation control modules and a main control module, wherein the main control module is used to control the abnormal simulation control modules and provide various abnormal simulation control modules The change combination of modules; the primary power supply is input to the corresponding abnormal analog control module, and under the control of the main control module, the abnormal analog control module processes the input primary power supply and outputs the secondary power supply to the system under test.

The device further includes: a program-controlled variable load module for providing variable load.

The control signal from the main control module is input to the program-controlled variable load module, and the required variable load output by the program-controlled variable load module is connected to the system under test, which consists of several program-controlled variable loads suitable for different power sources board composition.

The main control module is connected with the background control computer to receive the pre-set test program.

The abnormal analog control module is composed of several abnormal analog control unit boards for providing different common voltage values, and each abnormal analog control unit board further includes:

Programmable power supply module, used to provide output voltages of different specifications;

A preloaded circuit module is used to enable the programmable power supply module to maintain a normal voltage output when the load of the system under test is too light;

The digital-to-analog conversion and adjustment module is used to perform slow-change control, superimposed ripple control, and overvoltage and undervoltage control on the output voltage of the program-controlled power supply module;

A momentary interruption control module, used for momentary interruption or momentary drop control of the output power of the program-controlled power supply module;

The microcontroller module is used to control the above-mentioned modules.

The abnormal analog control module may also include an EMI (Electromagnetic Interference: Electromagnetic Interference) filter module for filtering the primary power supply and a voltage and current measurement module for real-time measurement of voltage and current values.

The program-controlled variable load board further includes a microcontroller for control and a resistance-capacitance matrix for realizing variable loads and a programmable relay or field effect tube or an electronic switch matrix. Under the action of the main control module, the relay or the field effect tube or the electronic switch matrix is controlled, and under the control of different switching combinations of the relay, the field effect tube or the electronic switch matrix, the resistance-capacitance matrix generates a corresponding combination and The output is a variable load that can be connected to the system under test.

The program-controlled variable load board refers to one or both of the program-controlled variable load board suitable for primary power supply and the program-controlled variable load board suitable for secondary power supply.

The device also includes a primary power on-off controller for realizing the primary power instantaneous interruption function.

The present invention provides a power supply simulation device for testing, which satisfies the performance assessment of power supply adaptability, fault tolerance and tolerance of a multi-power supply tested system by controlling a plurality of power supply control unit modules with abnormal simulation functions; The abnormal simulation of voltage value The control unit board can complete the simulation of partial power failure or partial voltage deviation of the system under test through a certain way of cooperative control. Simulation, instantaneous drop function of local power supply, and each abnormal simulation control unit board has real-time voltage and current detection function and ripple simulation function; the device also has load simulation function for primary power supply and secondary power supply.

In general, the present invention has the following advantages:

1. Any combination of multiple power supplies can be realized, and functions such as partial power-off and timing changes between different power supplies can be adjusted by program control;

2. It can realize the simulation function of instantaneous load change;

3. Make the abnormal test of the power supply that simulates the complete power supply system perfect, flexible and efficient.

4. Solve the problems of mutual interference, high current switching, load simulation and high current detection in the test.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the overall block diagram of the present invention;

Fig. 2 is a system architecture block diagram of an embodiment of the present invention;

Fig. 3 is a structural block diagram of the abnormal simulation control unit board in the embodiment of the present invention;

Fig. 4 is a structural block diagram of a program-controlled variable load board in an embodiment of the present invention.

Detailed ways

As shown in Figure 1, the power simulation device used for testing of the present invention is mainly composed of a main control module, an abnormal simulation control module, a program-controlled variable load module, a -48V power on-off controller and commonly used auxiliary circuit modules.

As shown in Figure 2, the abnormal analog control module used to provide various combinations of abnormal power changes in this embodiment consists of seven voltages of 5V, 3.3V, 2.5V, 1.8V, 1.5V, -5V, +-15V The abnormal analog control unit board composition.

As shown in Figure 3, the abnormal analog control unit boards that respectively provide various voltage values include: microcontroller module, program-controlled power supply module of corresponding specifications, preloading circuit module, digital-to-analog conversion and adjustment module, instantaneous control module, voltage and current Measurement module and EMI filter module. After the primary power supply is filtered by the EMI filter module, it enters the program-controlled power supply module to convert it into a voltage of corresponding specifications. The voltage enters the instantaneous interruption control module to make the power supply have the function of instantaneous interruption or instantaneous drop. The processed voltage is used as the secondary power supply. Output to the system under test; the control signal of the main control module is input to the microcontroller module, and then the microcontroller module controls the programmable power supply module, preloading circuit module, voltage and current measurement module, digital-to-analog conversion and adjustment module, and instantaneous Control module; the digital-to-analog conversion and adjustment module is output to the program-controlled power module to realize voltage slow-change control, superimposed ripple control, overvoltage and under-voltage output control functions; the preloading circuit module is connected to the output terminal of the program-controlled power module to realize the program-controlled power module When the load of the system under test is too light, it can still maintain the function of normal voltage output; the voltage and current measurement module is connected to the output terminal of the programmable power supply module to measure the voltage and current in real time.

As shown in Figure 2, the program-controlled variable load module for providing variable load in this embodiment consists of a program-controlled variable load board suitable for -48V primary power supply and a program-controlled variable load board suitable for secondary power supply.

As shown in Figure 4, each program-controlled variable load board includes a microcontroller, a high-current relay matrix and a resistance-capacitance load matrix. Its microcontroller controls the high-current relay matrix under the action of the main control module. Under the control of different switching combinations of the high-current relay matrix, the resistance-capacitance matrix generates a corresponding combination and the output can be connected to the system under test, which is suitable for different power supplies. variable load.

As shown in Figure 2, in this embodiment, the -48V power supply on-off controller that can realize the -48V primary power supply instantaneous interruption function, the -48V primary power supply is input to the -48V power supply on-off controller, and the role of the main control module is Next, output the processing results to the system under test.

The primary power required to be input in this embodiment is a -48V power supply.

When it is necessary to test the hardware system, the test device for simulating the abnormality and tolerance of multiple power supply combinations provided in this embodiment can replace each power supply applied on the actual circuit, and the power supply in this embodiment will be used according to the power supply situation and test requirements of the system under test. All or part of the outputs of the -48V power on-off controller, the abnormal analog control unit board of each voltage value and each program-controlled variable load board are connected to the system under test to provide the power supply and load required for the test.

The testing process consists of the following steps:

First, the main control module is connected to the background control computer through a pair of network ports and a pair of serial ports to receive preset test programs.

Second, the microcontroller in the main control module acts as the master of the communication channel, the microcontrollers in each abnormal analog control unit board and each program-controlled variable load board act as slaves, and the master distinguishes each power supply abnormality according to the address of each board The analog control unit board and the program-controlled variable load board are used to transmit instructions and data to realize real-time and combined control of each abnormal analog control unit board and program-controlled variable load board;

The micro-controllers in each power supply abnormality analog control unit board respectively control the program-controlled power supply module, pre-loading module, digital-to-analog conversion and adjustment module, instantaneous interruption control module, and voltage and current measurement module in the board according to the received instructions and data. Make all or part of the modules work so that the output voltage of this board has one or more of the following real-time states:

Output one of 5V, 3.3V, 2.5V, 1.8V, 1.5V, -5V, +-15V;

The output voltage realizes gradual changes, superimposed ripples, and changes in overvoltage and undervoltage;

Instantaneous interruption or drop of output voltage;

The output voltage still maintains the normal voltage output when the load of the system under test is too light.

The main control module combines the output voltage status of the abnormal analog control unit board of each voltage value, so as to realize the stability and safety test when the system under test is subjected to any combination of abnormal changes of multiple power sources.

In addition, the program-controlled variable load module can be activated when the system under test needs to connect a load. The microprocessor in each program-controlled variable load board in the program-controlled variable load module receives the instructions of the main control module, and controls the high-current relay matrix of this board to make it generate the required switching combination. Under the control of switching combinations, the resistance-capacitance matrix generates corresponding combinations and outputs variable loads that can be connected to the system under test.

Again, when the system under test needs to be connected to the -48V primary power supply, the -48V power supply on-off controller can be started. After receiving the command from the main control, it is turned on or off to meet the needs of the system under test for the -48V primary power supply.

The EMI filter module and the voltage and current measurement module in the abnormal analog control module of this embodiment are optional modules, and the high-current relay matrix in the program-controlled variable load module can also use a high-current FET matrix or a high-current electronic switch matrix.

The test device for simulating abnormal combination of multiple power supplies provided in this embodiment can replace each power supply applied on the actual circuit when testing the hardware system, and evaluate the stability and safety of the hardware system according to a certain combination relationship and program of abnormal simulation. sex.

Claims (8)

1. power supply analogue means of testing usefulness, this device includes unusual simulation control module, it is characterized in that, this device also includes the main control module, and described main control module is used for described unusual simulation control module is controlled and provided the variation combination of various unusual simulation control modules; Primary power source inputs to corresponding unusual simulation control module, and under the control of main control module, this is simulated control module unusually the primary power source of input is handled, and exports secondary power supply to system under test (SUT).

2. a kind of power supply analogue means of testing usefulness as claimed in claim 1 is characterized in that this device also further includes:

The Programmable and Variable load blocks is used to provide variable load; Import this Programmable and Variable load blocks from the control signal of described main control module, the required variable load of this Programmable and Variable load blocks output is connected to system under test (SUT).

3. a kind of power supply analogue means of testing usefulness as claimed in claim 1 or 2 is characterized in that described main control module links to each other with the backstage control computer, to receive pre-set test procedure.

4. a kind of power supply analogue means of testing usefulness as claimed in claim 1 or 2 is characterized in that, described unusual simulation control module provides the unusual analog controlling unit plate of different common voltage values to form by several.

5. a kind of power supply analogue means of testing usefulness as claimed in claim 4 is characterized in that, described unusual analog controlling unit plate further comprises:

The programmable power supply module, it has program control adjustable, and output different size voltage;

The prestrain circuit module is used to make described programmable power supply module still can keep normal voltage output when the system under test (SUT) underload;

Digital-to-analog conversion and adjusting module are used for the output voltage of described programmable power supply module is carried out gradual control, the control of stack ripple, overvoltage/undervoltage control;

The hit control module is used for that out-put supply to described programmable power supply module carries out instantaneous interruption or moment is fallen control;

Micro controller module is used to control above-mentioned each module.

6. a kind of power supply analogue means of testing usefulness as claimed in claim 5, it is characterized in that described unusual simulation control module can also comprise the EMI filtration module and the voltage and current measurement module that is used for real-time measuring voltage current value that is used for primary power source is carried out filtering.

7. a kind of power supply analogue means of testing usefulness as claimed in claim 2, it is characterized in that, described Programmable and Variable load board further includes the microcontroller that is used to control and is used to realize capacitance-resistance matrix and program-controlled relay or the field effect transistor or the electronic switch matrix of variable load, this microcontroller is controlled described relay or field effect transistor or electronic switch matrix under the effect of described main control module, under the different switching combining control of this relay or field effect transistor or electronic switch matrix, described capacitance-resistance matrix produces corresponding combination and exports the variable load that can link to each other with system under test (SUT).

8. a kind of power supply analogue means of testing usefulness as claimed in claim 1 is characterized in that this device also includes the primary power source on-off controller that is used to realize primary power source hit function.

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