Power supply diagnosis system

Abstract

The utility model provides a power supply diagnosis system which comprises a power supply module to be tested, a diagnosis module and a load module. The to-be-tested power supply module comprises a to-be-tested power supply. The diagnosis module comprises a first control unit, a switching unit and a resistor unit. The switching unit is electrically connected with the power supply to be tested, the resistor unit and the load module, and the first control unit is electrically connected with the switching unit. When current calibration needs to be carried out on the to-be-tested power supply, connection between the to-be-tested power supply and the load module can be established through the switching unit, and current calibration is carried out by using a constant current mode of the load module without using an additional calibration board, so that the operation difficulty and cost are reduced. And the load module also has a constant voltage mode, a constant power mode and a constant resistance mode, so that different voltage and current test requirements can be met, and the test scene range of the diagnosis system is expanded.

Description

Technical Field

[0001] This utility model relates to the field of power supply testing technology, specifically to a power supply diagnostic system. Background Technology

[0002] The diagnostic board is a diagnostic tool specifically designed to evaluate the status of programmable power supplies and signals on PGB boards. It applies a simulated load to generate current in the power supply and measures the output voltage and current for voltage and current detection. By setting different voltage output values, different current values ​​are generated. Finally, the measured voltage and current values ​​are compared with theoretical values; if they are within the allowable error range, the power supply is considered normal.

[0003] However, the analog loads in current diagnostic boards are usually resistors with fixed resistance values, which introduces errors when calibrating the power supply current. For example, to obtain 10A of current at 1.8V, ten 1.8Ω resistors need to be connected in parallel to 0.18Ω as the power supply load in the diagnostic board. However, the resistance of the layout traces and the on-resistance of the switches on the power supply will introduce errors in the current test results. In order to accurately calibrate the current, an additional calibration board is required to calibrate the power supply current, which increases the difficulty and cost of operation. Utility Model Content

[0004] This invention provides a power supply diagnostic system. When current calibration of the power supply under test is required, a connection between the power supply under test and the load module can be established through a switching unit. Current calibration is then performed using the constant current mode of the load module, eliminating the need for an additional calibration board and reducing operational complexity and cost. Furthermore, the load module also features constant voltage, constant power, and constant resistance modes to meet diverse voltage and current testing requirements, thus expanding the testing scenario range of the diagnostic system.

[0005] This utility model provides a power supply diagnostic system, which includes a power supply under test (UTP) module, a diagnostic module, and a load module. The UTP module includes a power supply under test, and the diagnostic module includes a first control unit, a switching unit, and a resistor unit. The switching unit is electrically connected to the UTP, the resistor unit, and the load module, respectively. The first control unit is electrically connected to the switching unit. The first control unit is configured to control the switching unit to operate, thereby forming a first diagnostic path between the UTP, the switching unit, and the resistor unit, or forming a second diagnostic path between the UTP, the switching unit, and the load module. The load module is configured to operate in one of the following modes: constant voltage mode, constant current mode, constant power mode, and constant resistance mode.

[0006] In some embodiments, the diagnostic module further includes a communication unit; the first control unit is also communicatively connected to the load module through the communication unit; the first control unit is also configured to control the operating mode of the load module.

[0007] In some embodiments, the switching unit includes: a first switching subunit, a second switching subunit, and a third switching subunit; the first switching subunit is electrically connected to the first control unit, the second switching subunit, and the third switching subunit respectively; the second switching subunit is also electrically connected to the power supply under test and the resistor unit respectively; the third switching subunit is also electrically connected to the power supply under test and the load module respectively; wherein, the first switching subunit is configured to receive an enable signal controlled by the first control unit and output the enable signal to the second switching subunit or the third switching subunit; the second switching subunit is configured to establish a connection between the power supply under test and the resistor unit based on the enable signal; the third switching subunit is configured to establish a connection between the power supply under test and the load module based on the enable signal.

[0008] In some embodiments, the first switching subunit includes a relay; a first terminal of the relay is electrically connected to an auxiliary power supply, a second terminal of the relay is electrically connected to ground, a third terminal of the relay is electrically connected to the second switching subunit, a fourth terminal of the relay is electrically connected to the third switching subunit, and a fifth terminal of the relay is used to receive the enable signal.

[0009] In some embodiments, the second switching subunit includes a first field-effect transistor (FET), and the third switching subunit includes a second FET; a first terminal of the first FET is electrically connected to the resistor unit, a second terminal of the first FET is electrically connected to the power supply under test, a third terminal of the first FET is electrically connected to the third terminal of the first switching subunit, a first terminal of the second FET is electrically connected to the load module, a second terminal of the second FET is electrically connected to the power supply under test, and a third terminal of the second FET is electrically connected to the fourth terminal of the first switching subunit.

[0010] In some embodiments, the diagnostic module further includes a voltage sampling unit; the voltage sampling unit is electrically connected to the power supply under test and the switching unit, and the voltage sampling unit is also communicatively connected to the first control unit.

[0011] In some embodiments, the power supply module under test further includes a first current sampling unit, which is electrically connected to the power supply under test and is also electrically connected to the switching unit; and / or, the diagnostic module further includes a second current sampling unit, which is electrically connected to the power supply under test and is also electrically connected to the switching unit.

[0012] In some embodiments, the power supply module under test further includes a second control unit; the second control unit is electrically connected to the power supply under test, and the second control unit is also communicatively connected to the first control unit.

[0013] In some embodiments, the diagnostic module further includes a banana plug socket; the switching unit is electrically connected to the load module via the banana plug socket.

[0014] In some embodiments, the diagnostic module further includes a circuit board and screws; the first control unit, the switching unit, and the resistor unit are all disposed on the circuit board, and the banana plug socket is fixed to the circuit board by the screws.

[0015] The beneficial effects of the power supply diagnostic system provided in this embodiment of the present invention are as follows: The power supply diagnostic system provided in this embodiment of the present invention includes: a power supply under test module, a diagnostic module, and a load module. The power supply under test module includes the power supply under test, and the diagnostic module includes a first control unit, a switching unit, and a resistor unit; the switching unit is electrically connected to the power supply under test, the resistor unit, and the load module respectively, and the first control unit is electrically connected to the switching unit; the first control unit is configured to control the operation of the switching unit, so that the power supply under test, the switching unit, and the resistor unit form a first diagnostic path, or, so that the power supply under test, the switching unit, and the load module form a second diagnostic path; wherein, the load module is configured to operate in one of the following modes: constant voltage mode, constant current mode, constant power mode, and constant resistance mode. When current calibration of the power supply under test is required, the connection between the power supply under test and the load module can be established through the switching unit, and the constant current mode of the load module can be used for current calibration, eliminating the need for an additional calibration board, reducing the difficulty and cost of operation. Furthermore, the load module also has constant voltage mode, constant power mode, and constant resistance mode, which can meet different voltage and current testing requirements and improve the testing scenario range of the diagnostic system. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 A structural block diagram of a power supply diagnostic system provided in an embodiment of this application;

[0018] Figure 2 A structural block diagram of another power diagnostic system provided in an embodiment of this application;

[0019] Figure 3 A structural block diagram of another power supply diagnostic system provided in the embodiments of this application;

[0020] Figure 4 This is a partial structural diagram of a power supply diagnostic system provided in an embodiment of this application;

[0021] Figure 5 A structural diagram of a first switch subunit provided in an embodiment of this application;

[0022] Figure 6 A structural diagram of a second switch subunit and a third switch subunit provided in an embodiment of this application;

[0023] Figure 7 A structural block diagram of another power diagnostic system provided in the embodiments of this application;

[0024] Figure 8 A structural block diagram of the fifth power supply diagnostic system provided in the embodiments of this application;

[0025] Figure 9 A structural block diagram of the sixth power supply diagnostic system provided in the embodiments of this application;

[0026] Figure 10 This is a structural block diagram of the seventh power supply diagnostic system provided in the embodiments of this application. Detailed Implementation

[0027] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "electrically connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "inner," "outer," "bottom," etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items. Furthermore, technical features involved in the different embodiments of this invention described below may be combined with each other as long as they do not conflict with each other.

[0029] This utility model provides a power supply diagnostic system, see reference. Figure 1 The power diagnostic system includes: a power supply module under test 100, a diagnostic module 200, and a load module 300.

[0030] The power supply module 100 includes a power supply under test 110, and the diagnostic module 200 includes a first control unit 210, a switching unit 220, and a resistor unit 230. The switching unit 220 is electrically connected to the power supply under test 110, the resistor unit 230, and the load module 300, respectively. The first control unit 210 is electrically connected to the switching unit 220. The first control unit 210 is configured to control the switching unit 220 to form a first diagnostic path between the power supply under test 110, the switching unit 220, and the resistor unit 230, or to form a second diagnostic path between the power supply under test 110, the switching unit 220, and the load module 300. The load module 300 is configured to operate in one of the following modes: constant voltage mode, constant current mode, constant power mode, and constant resistance mode.

[0031] The power supply under test 110 refers to a power supply with programmable voltage or current output.

[0032] The first control unit 210 includes a field-programmable gate array (FPGA). It is responsible for receiving instructions, processing data, and controlling the working state of the switching unit 220 to control the diagnostic process of the power supply 110 under test.

[0033] The switching unit 220 refers to a device that, under the control of the first control unit 210, can establish a connection between the power supply under test 110 and the resistor unit 230 and disconnect the connection between the power supply under test 110 and the load module 300, or establish a connection between the power supply under test 110 and the load module 300 and disconnect the connection between the power supply under test 110 and the resistor unit 230. It may include devices such as a switching switch.

[0034] Resistor unit 230 refers to a device that includes one or more fixed resistors. In resistor unit 230, the fixed resistors can be connected in series or in parallel, so that resistor unit 230 can provide a fixed resistance value for the first diagnostic path to simulate a load for power supply diagnostics.

[0035] The load module 300 can be a programmable electronic load with constant voltage mode, constant current mode, constant power mode, and constant resistance mode. The load module 300 has a first terminal and a second terminal. The first terminal is electrically connected to the switching unit 220, and the second terminal is grounded. In constant voltage mode, the voltage between the first and second terminals of the load module 300 is a constant value. In constant current mode, the current flowing through the load module 300 is a constant value. In constant power mode, the load module 300 operates at a constant power; that is, the product of the current flowing through the load module 300 and the voltage across the load module 300 is the set power value. In constant resistance mode, the resistance of the load module 300 is a constant value, and the current flowing through the load module 300 and the voltage across the load module 300 change linearly to match this resistance value.

[0036] In this diagnostic system, when the resistance value of the resistor unit 230 in the first diagnostic path cannot meet the test requirements of the power supply under test 110, the first control unit 210 can control the switching unit 220 to establish a connection between the power supply under test 110 and the load module 300, thereby forming a second diagnostic path. In this way, the load module 300 can operate in one of the modes of constant voltage mode, constant current mode, constant power mode and constant resistance mode, which meets the test requirements of the power supply under test 110 and improves the test scenario range of the diagnostic system.

[0037] Furthermore, in some implementations, when current calibration of the power supply 110 under test is required, after forming the second diagnostic path, the load module 300 can be set to constant current mode. In this mode, the current in the second diagnostic path should theoretically be the constant current value set by the load module 300, and the load resistance, trace resistance, and on-resistance of the switching transistor can be ignored. This allows the current flowing through the load module 300 to be set to operate at multiple target current values, and the measured current values ​​in the circuit can be obtained at different target current values. The current calibration parameters of the power supply 110 under test can be obtained through the error between the multiple target current values ​​and the corresponding measured current values ​​for current calibration. The specific calibration process can be found in existing technologies and is not limited here. Therefore, by using the second diagnostic path and the constant current mode of the load module 300, current calibration of the power supply 110 under test can be performed without the need for an additional calibration board, reducing operational difficulty and cost.

[0038] In some of these embodiments, see Figure 2The diagnostic module 200 also includes a communication unit 240. The first control unit 210 is also communicatively connected to the load module 300 via the communication unit 240. The first control unit 210 is also configured to control the operating mode of the load module 300.

[0039] The communication unit 240 can be an interface module that adopts the RS232 serial communication standard. Specifically, the first control unit 210 and the communication unit 240 transmit data using the UART communication protocol, and the communication unit 240 and the load module 300 transmit data using the RS232 communication protocol, thereby realizing communication between the first control unit 210 and the load module 300.

[0040] In this embodiment, by making the first control unit 210 communicatively connected to the load module 300, when the power supply under test 110 is tested using the second diagnostic path, the first control unit 210 can directly control the working mode of the load module 300 to meet the corresponding test requirements.

[0041] In some of these embodiments, see Figure 3 The switching unit 220 includes a first switching subunit 221, a second switching subunit 222, and a third switching subunit 223. The first switching subunit 221 is electrically connected to the first control unit 210, the second switching subunit 222, and the third switching subunit 223. The second switching subunit 222 is also electrically connected to the power supply under test 110 and the resistor unit 230. The third switching subunit 223 is also electrically connected to the power supply under test 110 and the load module 300. The first switching subunit 221 is configured to receive an enable signal from the first control unit 210 and output the enable signal to either the second switching subunit 222 or the third switching subunit 223. The second switching subunit 222 is configured to establish a connection between the power supply under test 110 and the resistor unit 230 based on the enable signal. The third switching subunit 223 is configured to establish a connection between the power supply under test 110 and the load module 300 based on the enable signal.

[0042] The enable signal is a level signal that can be used to control the conduction of the second switch subunit 222 and the third switch subunit 223. For example, it can be a high-level signal. In practical applications, the enable signal can be a low-level signal, which is related to the device selection of the second switch subunit 222 and the third switch subunit 223.

[0043] Specifically, the enable signal can be directly controlled and output to the first switching subunit 221 by the first control unit 210, or it can be generated by the first control unit 210 controlling the switching unit and output to the first switching subunit via the switching unit. The switching unit includes at least one switching device selected from NPN transistors, MOSFETs, and multiplexers. The switching unit is electrically connected to the first control unit 210, the first power supply, and the first switching subunit 221. The first power supply is provided by a power source other than the power supply under test, meaning the first power supply and the power supply under test 110 are independent of each other. The voltage of the first power supply is set as needed. Figure 4 As shown, the switching unit includes an NPN transistor Q3, a PMOS transistor Q4, resistors R3, R4, and R5. The base of the NPN transistor Q3 is connected to the first control unit 210 through resistor R3, the emitter of the NPN transistor is grounded, the collector of the NPN transistor is connected to the gate of the PMOS transistor Q4 through resistor R4, the source of the PMOS transistor Q4 is connected to the first power supply VTT1, the gate of the PMOS transistor Q4 is connected to the source of the PMOS transistor Q4 through resistor R5, and the drain of the PMOS transistor Q4 is connected to the first switching subunit 221.

[0044] If the first control unit 210 controls the switch unit to turn off, such as controlling the NPN transistor Q3 to turn off, then the PMOS transistor Q4 will turn off, causing the connection between the first power supply VTT1 and the first switch subunit 221 to be disconnected. The first switch subunit 221 cannot receive the enable signal. At this time, the second switch subunit 222 and the third switch subunit 223 are both in the off state, and the first diagnostic path and the second diagnostic path cannot be formed. If the first control unit 210 controls the switching unit to conduct, such as controlling the NPN transistor Q3 to conduct, then the PMOS transistor Q4 conducts, establishing a connection between the first power supply and the first switching subunit 221. This causes the first power supply VTT1 to output a high-level signal (enable signal) to the first switching subunit 221. If the first switching subunit 221 outputs the enable signal to the second switching subunit 222 at this time, the second switching subunit 222 conducts after receiving the high-level signal, establishing a connection between the power supply under test 110 and the resistor unit 230, forming a first diagnostic path. At this time, the third switching subunit 223 is in the off state. If the first switching subunit 221 outputs the enable signal to the third switching subunit 223 at this time, the third switching subunit 223 conducts after receiving the high-level signal, establishing a connection between the power supply under test 110 and the load module 300, forming a second diagnostic path. At this time, the second switching subunit 222 is in the off state.

[0045] In this embodiment, by setting the above-mentioned switch subunit, the power supply can be tested by switching between the first diagnostic path and the second diagnostic path.

[0046] In some of these embodiments, see Figure 5 The first switch subunit 221 includes a relay 2211. The first terminal of the relay 2211 is electrically connected to the auxiliary power supply 140, the second terminal of the relay 2211 is electrically connected to ground GND, the third terminal of the relay 2211 is electrically connected to the second switch subunit 222, the fourth terminal of the relay 2211 is electrically connected to the third switch subunit 223, and the fifth terminal of the relay 2211 is used to receive the enable signal EN.

[0047] The auxiliary power supply 140 is independent of the power supply under test 110. The auxiliary power supply 140 can be set inside the power supply module 100 under test, and the voltage of the auxiliary power supply 140 can be set according to actual needs.

[0048] Relay 2211 can be a single-pole double-throw (SPDT) relay or a double-pole double-throw (DPDT) relay, and its configuration can be adjusted according to the number of power supplies 110 under test. Taking a SPDT relay as an example, the first terminal of relay 2211 is the positive terminal of the SPDT relay coil, the second terminal of relay 2211 is the negative terminal of the SPDT relay coil, the third terminal of relay 2211 is the normally closed contact of the SPDT relay, the fourth terminal of relay 2211 is the normally open contact of the SPDT relay, and the fifth terminal of relay 2211 is the moving contact of the SPDT relay. When the first control unit 210 controls the switching unit to output the enable signal EN or the first control unit 210 directly outputs the enable signal EN, if the auxiliary power supply 140 outputs a voltage signal to the positive terminal of the coil, the moving contact will move from the normally closed position to the normally open position, causing the normally closed contact to open and the normally open contact to close, thus establishing a connection between the enable signal EN and the third switching subunit 223. When the auxiliary power supply 140 is de-energized, i.e. the coil is de-energized, the moving contact will return to the normally closed position, causing the normally open contact to open and the normally closed contact to close, thus establishing a connection between the enable signal EN and the second switch subunit 222.

[0049] As can be seen, by setting relay 2211, and by controlling whether the enable signal EN is output to relay 2211 through the first control unit 210, and controlling whether the auxiliary power supply 140 supplies power to the positive terminal of the coil of relay 2211, the connection between the enable signal and different switching sub-units can be switched, thereby forming a first diagnostic path or a second diagnostic path.

[0050] In some of these embodiments, see Figure 6The second switch subunit 222 includes a first field-effect transistor Q1, and the third switch subunit 223 includes a second field-effect transistor Q2. The first terminal of the first field-effect transistor Q1 is electrically connected to the resistor unit 230, the second terminal of the first field-effect transistor Q1 is electrically connected to the power supply under test 110, the first terminal of the second field-effect transistor Q2 is electrically connected to the load module 300, the second terminal of the second field-effect transistor Q2 is electrically connected to the power supply under test 110, the third terminal of the first field-effect transistor Q1 is electrically connected to the third terminal of the first switch subunit 221, and the third terminal of the second field-effect transistor Q2 is electrically connected to the fourth terminal of the first switch subunit 221.

[0051] like Figure 6 As shown, the first field-effect transistor Q1 can be a first dual-N-channel MOSFET, and the second field-effect transistor Q2 can be a second dual-N-channel MOSFET. The first terminal of the first field-effect transistor Q1 is the source S1 of the first dual-N-channel MOSFET, the second terminal of the first field-effect transistor Q1 is the source S2 of the first dual-N-channel MOSFET, and the third terminal of the first field-effect transistor Q1 is the gate G1 and gate G2 of the first dual-N-channel MOSFET. The first terminal of the second field-effect transistor Q2 is the source S1 of the second dual-N-channel MOSFET, the second terminal of the second field-effect transistor Q2 is the source S2 of the second dual-N-channel MOSFET, and the third terminal of the second field-effect transistor Q2 is the gate G1 and gate G2 of the second dual-N-channel MOSFET. The drains D1 and D2 of the first dual-N-channel MOSFET and the drains D1 and D2 of the second dual-N-channel MOSFET can be left floating.

[0052] In this circuit, if the first switching subunit 221 establishes a connection between the enable signal and the first field-effect transistor Q1, that is, the first field-effect transistor Q1 receives the enable signal (such as a high-level signal) output by the first switching subunit 221, the first field-effect transistor Q1 is turned on, establishing a connection between the power supply under test 110 and the resistor unit 230, forming a first diagnostic path; if the first switching subunit 221 establishes a connection between the enable signal and the second field-effect transistor Q2, that is, the second field-effect transistor Q2 receives the enable signal (such as a high-level signal) output by the first switching subunit 221, the second field-effect transistor Q2 is turned on, establishing a connection between the power supply under test 110 and the load module 300, forming a second diagnostic path.

[0053] As can be seen, by controlling the conduction and cutoff of the first field-effect transistor Q1 and the second field-effect transistor Q2 through the first switch subunit 221, the first diagnostic path (the connection between the power supply under test 110 and the resistor unit 230) or the second diagnostic path (the connection between the power supply under test 110 and the load module 300) can be flexibly selected, so that the circuit can switch according to different test requirements or working scenarios.

[0054] In some implementations, participation Figure 6The second switch subunit 222 also includes a pull-down resistor R1, and the third switch subunit 223 also includes a pull-down resistor R2. By setting the pull-down resistors R1 and R2, the first field-effect transistor Q1 and the second field-effect transistor Q2 can be reliably turned off when they do not receive a high-level signal or receive noise, thereby improving the reliability of the circuit operation.

[0055] In some of these embodiments, see Figure 7 The diagnostic module 200 also includes a voltage sampling unit 250. The voltage sampling unit 250 is electrically connected to the power supply under test 110 and the switching unit 220, respectively, and is also communicatively connected to the first control unit 210.

[0056] The voltage sampling unit 250 is a device that can measure the output voltage of the power supply 110 under test. Its specific structure can refer to existing technology and is not limited here. The voltage sampling unit 250 and the first control unit 210 can be connected via SPI bus communication.

[0057] In this embodiment, by setting a voltage sampling unit 250, the first control unit 210 can obtain the output voltage of the power supply 110 under test obtained through the voltage sampling unit 250, so as to diagnose whether the power supply 110 under test is normal.

[0058] In some of these embodiments, see Figure 8 The power supply module under test 100 also includes a first current sampling unit 120, which is electrically connected to the power supply under test 110 and also electrically connected to the switching unit 220; and / or, see [reference] Figure 9 The diagnostic module 200 also includes a second current sampling unit 260, which is electrically connected to the power supply under test 110 and is also electrically connected to the switching unit 220.

[0059] The first current sampling unit 120 and the second current sampling unit 260 both refer to devices that can measure the output current of the power supply 110 under test, that is, devices that can measure the current of the first diagnostic path and the second diagnostic path. Their specific structures can refer to the prior art and are not limited here.

[0060] In this embodiment, by incorporating a first current sampling unit 120 into the power supply module 100 under test, and / or by setting a second current sampling unit 260 in the diagnostic module 200, and subsequently connecting the first current sampling unit 120 and the second current sampling unit 260 to the first control unit 210, the first control unit 210 can obtain the output current of the power supply 110 under test through the aforementioned current sampling units to diagnose whether the power supply 110 under test is normal.

[0061] In some of these embodiments, see Figure 10 The power supply module under test 100 also includes a second control unit 130; the second control unit 130 is electrically connected to the power supply under test 110, and the second control unit 130 is also communicatively connected to the first control unit 210.

[0062] The second control unit 130 may be a microcontroller unit (MCU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), a microcontroller, an advanced reduced instruction set computer (ARM), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of these components.

[0063] In this embodiment, the second control unit 130 can communicate with the first control unit 210, such as by using an SPI bus communication connection, to receive instructions from the first control unit 210 to control the power supply under test 110 to work, so that the power supply under test 110 works according to the set voltage and / or current, so as to ensure that the system can perform the corresponding test process.

[0064] In some implementations, participation Figure 10 The second control unit 130 is also communicatively connected to the first current sampling unit 120. For example, the two can be connected via an SPI bus. In this way, the second control unit 130 can obtain the output current of the power supply under test 110 through the first current sampling unit 120 and send the output current to the first control unit 210 so that the first control unit 210 can obtain the output current and perform the diagnostic process for the power supply under test 110.

[0065] In some embodiments, the diagnostic module 200 also includes a banana plug socket; the switching unit 220 is electrically connected to the load module 300 via the banana plug socket.

[0066] Banana plug sockets, also commonly known as banana plug sockets or banana connectors, have metal contact pieces inside the socket that make tight contact with the metal clamping part of the banana plug, forming a reliable electrical connection. By utilizing the banana plug socket electrical connection switching unit 220 and the load module 300, testers can quickly establish or disconnect the connection between the diagnostic module 200 and the load module 300. Furthermore, the banana plug socket has good insulation properties, preventing exposed wires and improving the safety and reliability of the circuit connection.

[0067] In some embodiments, the diagnostic module 200 further includes a circuit board and screws; the first control unit 210, the switching unit 220 and the resistor unit 230 are all disposed on the circuit board, and the banana plug socket is fixed to the circuit board by screws.

[0068] Circuit boards, also known as printed circuit boards (PCBs), are typically made of insulating materials such as epoxy fiberglass boards.

[0069] In this embodiment, the banana plug socket is fixed to the circuit board with screws, which can securely assemble the banana plug socket to the circuit board and prevent the banana plug socket from loosening or falling off.

[0070] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above, which are not provided in detail for the sake of brevity; although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A power supply diagnostic system, characterized by, The application relates to a power supply module, a diagnosis module and a load module. The power supply module comprises a power supply to be tested, the diagnosis module comprises a first control unit, a switching unit and a resistance unit. The switching unit is electrically connected with the power supply to be tested, the resistance unit and the load module respectively, and the first control unit is electrically connected with the switching unit. The first control unit is configured to control the switching unit to work, so that the power supply to be tested, the switching unit and the resistance unit form a first diagnosis path, or the power supply to be tested, the switching unit and the load module form a second diagnosis path. The load module is configured to work in one of a constant voltage mode, a constant current mode, a constant power mode and a constant resistance mode. The diagnosis module further comprises a communication unit.

2. The power supply diagnostic system of claim 1, wherein The first control unit is further communicatively connected with the load module through the communication unit. The first control unit is further configured to control the working mode of the load module. The switching unit comprises a first switching subunit, a second switching subunit and a third switching subunit.

3. The power diagnostic system of claim 1, wherein The first switching subunit is electrically connected with the first control unit, the second switching subunit and the third switching subunit respectively, the second switching subunit is further electrically connected with the power supply to be tested and the resistance unit respectively, and the third switching subunit is further electrically connected with the power supply to be tested and the load module respectively. The first switching subunit is configured to receive an enable signal output by the first control unit and output the enable signal to the second switching subunit or the third switching subunit. The second switching subunit is configured to establish a connection between the power supply to be tested and the resistance unit based on the enable signal. The third switching subunit is configured to establish a connection between the power supply to be tested and the load module based on the enable signal. The first switching subunit comprises a relay.

4. The power diagnostic system of claim 3, wherein The first end of the relay is electrically connected with an auxiliary power supply, the second end of the relay is electrically connected with the ground, the third end of the relay is electrically connected with the second switching subunit, the fourth end of the relay is electrically connected with the third switching subunit, and the fifth end of the relay is used for receiving the enable signal. The second switching subunit comprises a first field effect transistor, and the third switching subunit comprises a second field effect transistor.

5. The power diagnostic system of claim 3, wherein The first end of the first field effect transistor is electrically connected with the resistance unit, the second end of the first field effect transistor is electrically connected with the power supply to be tested, the third end of the first field effect transistor is electrically connected with the third end of the first switching subunit, the first end of the second field effect transistor is electrically connected with the load module, the second end of the second field effect transistor is electrically connected with the power supply to be tested, and the third end of the second field effect transistor is electrically connected with the fourth end of the first switching subunit. The diagnosis module further comprises a voltage sampling unit.

6. The power supply diagnostic system of any of claims 1-5, wherein, The voltage sampling unit is electrically connected with the power supply to be tested and the switching unit respectively, and the voltage sampling unit is communicatively connected with the first control unit. ​ 7. The power supply diagnostic system of any one of claims 1-5, wherein: the power supply under test further comprises a first current sampling unit, the first current sampling unit is electrically connected with the power supply under test, and the first current sampling unit is further electrically connected with the switching unit; and / or, the diagnostic module further comprises a second current sampling unit, the second current sampling unit is electrically connected with the power supply under test, and the second current sampling unit is further electrically connected with the switching unit.

8. The power supply diagnostic system of any of claims 1-5, wherein, the power supply under test further comprises a second control unit; the second control unit is electrically connected with the power supply under test, and the second control unit is further communicatively connected with the first control unit.

9. The power supply diagnostic system of any of claims 1-5, wherein, the diagnostic module further comprises a banana plug socket; the switching unit is electrically connected with the load module through the banana plug socket.

10. The power diagnostic system of claim 9, wherein, the diagnostic module further comprises a circuit board and a screw; the first control unit, the switching unit, and the resistance unit are all arranged on the circuit board, and the banana plug socket is fixed on the circuit board through the screw.

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