Test system applied to power supply network module

Abstract

The utility model discloses a test system applied to a power supply network module, and the system comprises an upper computer, the first end of which receives a test trigger instruction, the second end of which provides a test control instruction, and the control end of which receives a test signal or a signal to be monitored; a first end of the fault detection module receives the test control instruction, a second end provides a to-be-monitored signal, and a control end provides a target fault signal; the first end of the incubator receives the test control instruction, and the second end provides a target temperature; the first end of the load module receives the test control instruction, and the second end provides a target load signal; and the power supply is provided with a first end and a second end, the first end receives the test control instruction, and the second end provides a target voltage signal. According to the utility model, the temperature box and the fault detection module are combined in the test system, and a simulation test environment closer to a real vehicle working environment can be provided, so that the accuracy and the reliability of a test result are improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle testing technology, specifically a testing system applied to power network modules. Background Technology

[0002] Currently, the main testing method for Power Network Guardian (PNG) modules during the R&D phase is signal-level verification, typically using CAN signal simulation and low-voltage signals for functional and logic verification. However, due to the significant differences between the testing environment and the real vehicle environment, the accuracy and reliability of the test results are affected, leading to problems in real vehicle testing for PNGs that have passed testing during the R&D phase. Utility Model Content

[0003] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by this utility model is how to improve the testing accuracy and reliability of power network modules.

[0004] To address at least one of the aforementioned technical problems, this utility model discloses a testing system for power network modules.

[0005] According to one aspect of this disclosure, a test system for a power network module is provided, comprising:

[0006] The host computer has a first terminal, a second terminal, and a control terminal. The first terminal receives test trigger commands, the second terminal provides test control commands, and the control terminal receives test signals or signals to be monitored.

[0007] The fault detection module has a first terminal, a second terminal, and a control terminal, wherein the first terminal receives the test control command, the second terminal provides the target fault signal, and the control terminal provides the signal to be monitored.

[0008] The temperature chamber has a first end and a second end, wherein the first end receives the test control command and the second end provides the target temperature;

[0009] The load module has a first end and a second end, wherein the first end receives the test control command and the second end provides the target load signal;

[0010] The power supply has a first terminal and a second terminal, wherein the first terminal receives the test control command and the second terminal provides the target voltage signal.

[0011] Implementing this utility model has the following beneficial effects:

[0012] In this invention, by incorporating a temperature chamber with low-temperature and high-temperature simulation functions, and a fault detection unit capable of simulating fault signals and monitoring the test system in real time, the PNG can simulate different faults and extreme temperature environments during testing. Furthermore, the load module provides the device under test with a current signal closer to the real-vehicle environment, thus making the PNG's testing environment more closely resemble the real-vehicle environment, thereby improving the accuracy and reliability of the test results. Simultaneously, the inclusion of the temperature chamber and fault detection unit allows the test system to be applied to a wider temperature range and more fault-related testing environments, thereby increasing the richness of the test system's applicable scenarios. The fault detection module can also collect the physical and simulated signals corresponding to the PNG in real time and analyze them in conjunction with the host computer, improving the real-time performance of PNG fault diagnosis. Attached Figure Description

[0013] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 The system architecture diagram corresponding to the testing system provided in the embodiments of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the fault detection module provided in an embodiment of the present invention. Detailed Implementation

[0016] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of them. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or server that comprises a series of steps or units, not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0018] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0019] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0020] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0021] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0022] Figure 1 This diagram illustrates the architecture of a test system applied to a power network module; please refer to [link / reference]. Figure 1 A test system for power network modules may include:

[0023] The host computer has a first terminal, a second terminal, and a control terminal. The first terminal receives test trigger commands, the second terminal provides test control commands, and the control terminal receives test signals or signals to be monitored.

[0024] The fault detection module has a first terminal, a second terminal, and a control terminal, wherein the first terminal receives the test control command, the second terminal provides the signal to be monitored, and the control terminal provides the target fault signal;

[0025] The temperature chamber has a first end and a second end, wherein the first end receives the test control command and the second end provides the target temperature;

[0026] The load module has a first end and a second end, wherein the first end receives the test control command and the second end provides the target load signal;

[0027] The power supply has a first terminal and a second terminal, wherein the first terminal receives the test control command and the second terminal provides the target voltage signal.

[0028] The testing system also includes a CAN module; the testing system is used to test the device under test.

[0029] The fault detection module is connected to the host computer via the CAN module; the temperature chamber, the load module, and the power supply are connected to the host computer via serial ports.

[0030] In one specific embodiment, the test system may include at least a host computer, a temperature chamber, a fault detection module, a load module, and a power supply; the device under test may be a PNG.

[0031] The host computer can be any computer system capable of controlling the test system's corresponding test timing and signal interaction, and analyzing the test results. The host computer can include a first terminal, a second terminal, and a control terminal. The first terminal can receive test trigger commands to enable the test system to perform tests on the device under test. These test trigger commands can be issued by the user through interaction with the host computer, or automatically generated by the host computer based on a preset test timing sequence, which can be modified according to different requirements. The second terminal is used to provide test control commands to the fault detection module via the CAN module, and to provide test control commands to the temperature chamber, load module, and power supply via the serial port. In the test control instructions, temperature simulation instructions for controlling the test temperature, fault simulation instructions for providing test interference faults, voltage adjustment instructions for providing test voltage signals, and current adjustment instructions for providing test current signals may be included. The control terminal receives test signals to determine and analyze the test results of the PNG test based on the test signals, or the control terminal receives signals to be monitored, which correspond to the operating signals of the device under test, such as voltage, current, switching signals, and CAN signals. By acquiring the signals to be monitored, it is determined whether there are abnormal monitoring signals and possible fault information, and fault prompt information including fault information is generated.

[0032] The fault detection module may include a first end, a second end, and a control end. The first end is connected to the host computer via a CAN module to receive fault simulation commands from the test control commands, so that the fault detection module can generate a target fault signal according to the fault simulation commands. The control end is used to provide the target fault signal to the device under test, thereby providing a simulated test environment that is closer to the actual vehicle operating conditions. In addition, the fault detection module can also acquire the physical operating signals and bus signals of the device under test in real time, and send them to the host computer as the signals to be monitored through the second end, so as to realize the monitoring of the operating status of the device under test through the host computer.

[0033] Figure 2 This is a schematic diagram of the structure of the fault detection module provided in the embodiment of this utility model; as shown below. Figure 2 As shown, the fault detection module includes a control unit, a signal output unit, a signal acquisition unit, and a communication unit. The control unit is used to control the fault detection module to acquire the monitoring signal corresponding to the device under test, and to provide the target fault signal to the device under test. The signal output unit includes a switch signal output unit and an analog signal output unit. The signal acquisition unit includes a switch signal acquisition unit, an analog signal acquisition unit, a thermocouple acquisition unit, and a current signal acquisition unit. The fault detection module also includes a device triggering unit.

[0034] The signal output unit provides the target fault signal to the device under test; the signal acquisition unit is used to acquire the monitoring signal corresponding to the device under test; and the communication unit is connected to the CAN module and provides the test signal to the host computer through the CAN module.

[0035] In one specific embodiment, the fault detection module is used to simulate a bus environment to generate interference signals for the CAN module, such as repeated sleep / wake cycles, or bus faults like high bus load, open circuits, or short circuits—the target fault signals. The fault detection module is also used to acquire physical signals and bus signals of the device under test in real time—the test monitoring signals—and to use a host computer to analyze these signals to make erroneous judgments and provide alerts for abnormal signals and potential faults. Therefore, to achieve the above functions of the fault detection module, it can be configured to include a signal output unit, a signal acquisition unit, and a communication unit.

[0036] For the control unit, it is used to control the operation of each unit in the fault detection module. For example, after receiving the test control command, the control signal output unit generates the target fault signal and provides the target fault signal to the device under test through the communication unit; or, the control signal acquisition unit acquires the monitoring signal corresponding to the device under test and sends the monitoring signal to the host computer through the communication unit.

[0037] For the signal output unit, after receiving the fault simulation command, under the control of the control unit, it provides the target fault signal to the device under test through the communication unit according to the fault simulation command. The signal output unit may include a switch signal output unit and an analog signal output unit. The target fault signal may include at least a short circuit fault signal, an open circuit fault signal, and a voltage fault signal. The switch signal output unit is used to control the switch signal to create faults such as short circuit and open circuit, and generate the corresponding short circuit fault signal and open circuit fault signal. The analog signal output unit is used to realize the analog voltage output to create a power supply fault and generate a voltage fault signal.

[0038] The signal acquisition unit is used to acquire the monitored signal under the control of the control unit and transmit the monitored signal to the host computer through the communication unit to analyze possible faults or abnormalities in the device under test. The monitored signal can be the signal of the device under test operating under a specific test environment. The signal acquisition unit can include a switch signal acquisition unit, an analog signal acquisition unit, a thermocouple acquisition unit, and a current signal acquisition unit. The monitored signal can include high / low level signals, test voltage signals, test current signals, and test temperatures. The switch signal acquisition unit is used to acquire and determine the corresponding high / low level signals of the device under test, and to detect ignition signals, switch on / off states, and wake-up signals, etc. The high / low level signals can be either high or low level signals. The analog signal acquisition unit is used to acquire the test voltage signal of the device under test, with a test range of 0–80V. The thermocouple acquisition unit is used to acquire the test temperature of the device under test, with a test range of -40℃ to 120℃. The current signal acquisition unit is used to acquire the test current signal of the device under test, with a test range of 0–100A, and can be used to detect the current flowing through the MOSFET in the device under test.

[0039] The communication unit is used to transmit signals between the fault detection module and other devices; the communication unit can support CAN / LI N / CANFD communication; in this invention, it is preferably connected to a CAN module, through which the monitored signal is provided to the host computer.

[0040] The device triggering unit can implement high / low side power supply function to output PWM signal (pulse width modulation signal), which can be used to wake up the sleep device under test, thereby realizing the simulation of test scenario of repeated sleep and wake-up.

[0041] The device under test (DUT) can be connected to a fault detection module, a load module, and a power supply, and placed inside a temperature chamber to receive target fault signals, target load signals, and target voltage signals, thereby simulating a specific test environment and specific test faults. The DUT operates under this specific test environment and generates test signals corresponding to that environment. Signal transmission between the host computer and the DUT can be achieved through a CAN module or test harness, allowing the test signals to be sent to the host computer for processing and analysis to obtain the test results.

[0042] The temperature chamber has a first terminal and a second terminal. The first terminal connects to a host computer via a CAN module to receive temperature simulation commands from the host computer and generate a target temperature based on these commands. The second terminal provides the target temperature to the device under test, creating a target temperature environment that more closely approximates real-world vehicle operating conditions. The target temperature range is -40℃ to 120℃. By controlling the temperature chamber to provide a testing environment of -40℃ to 120℃ through the host computer, the functionality and performance of the PNG (Physical Equipment Required) can be verified under extremely cold and hot environments. This improves the richness and reliability of the test results and expands the application scenarios of the testing system.

[0043] The load module has a first terminal and a second terminal. The first terminal connects to the host computer via a CAN module to receive current adjustment commands from the host computer and generate a target load signal based on the current adjustment commands. The second terminal is used to provide the target load signal to the device under test, allowing the test environment to vary over a wider range, thus more closely resembling real-vehicle operating conditions. The load module can be an I8514C+, with an adjustable current range of 0–240A corresponding to the target load signal. By setting up a load module that provides a large current signal, high-load scenarios under real-vehicle operating conditions are simulated, thereby improving the richness and reliability of test results and expanding the application scenarios of the test system.

[0044] The power supply has a first terminal and a second terminal. The first terminal connects to the host computer via a CAN module to receive voltage adjustment commands from the host computer and generate a target voltage signal based on the commands. The second terminal provides the target voltage signal to the device under test, allowing the test environment to vary over a wider range, thus more closely resembling real-vehicle operating conditions. The power supply can be an IT6512C, and the target voltage signal corresponds to a voltage range of 0–80V. The host computer, through control of the power supply and load module, can also provide information on overvoltage, undervoltage, and voltage fluctuation abnormalities.

[0045] The testing system also includes a test harness;

[0046] The fault detection module, the load module, and the power supply are all connected to the device under test via the test harness. Additionally, the device under test is also connected to the host computer via the CAN module.

[0047] In one specific embodiment, the test system also includes a test harness. While the specific type of test harness is not specified, it should be a harness capable of connecting to the device under test (DUT) and enabling communication between the DUT and other modules or structures within the test system. The test harness connects the DUT to the fault detection module, temperature chamber, load module, and power supply, respectively, allowing the DUT to receive target temperature, target load signals, target fault signals, and target voltage signals. This provides the DUT with a simulated test environment more closely resembling that of a real vehicle.

[0048] The device under test is connected to the control terminal of the host computer via a CAN module, so that the test signals generated by the device under test in the simulated test environment can be sent to the host computer via the CAN module, and the host computer can analyze the test signals to obtain the test results. Since the test process is performed in a simulated test environment that is more similar to the real vehicle environment, the accuracy of the test results can be improved.

[0049] As can be seen from the embodiments provided by this utility model, by adding a temperature chamber with low-temperature and high-temperature simulation functions and a fault detection unit capable of simulating fault signals and monitoring the test system in real time to the test system, the PNG can simulate different faults and extreme temperature environments during the test. In addition, the load module can provide the device under test with a current signal that is closer to the actual vehicle environment, thereby making the test environment of the PNG closer to the actual vehicle environment, thus improving the accuracy and reliability of the test results. At the same time, due to the setting of the temperature chamber and the fault detection unit, the test system can be applied to a wider temperature range and test environments corresponding to more faults, thereby improving the richness of the test system's applicable scenarios; the setting of the fault detection module can also collect the physical signals and analog signals corresponding to the PNG in real time and analyze them in conjunction with the host computer to improve the real-time performance of PNG fault judgment.

[0050] It should be noted that the various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technological improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A test system for power network modules, characterized in that, The system includes: The host computer has a first terminal, a second terminal, and a control terminal. The first terminal receives test trigger commands, the second terminal provides test control commands, and the control terminal receives test signals or signals to be monitored. The fault detection module has a first terminal, a second terminal, and a control terminal, wherein the first terminal receives the test control command, the second terminal provides the signal to be monitored, and the control terminal provides the target fault signal; The temperature chamber has a first end and a second end, wherein the first end receives the test control command and the second end provides the target temperature; The load module has a first end and a second end, wherein the first end receives the test control command and the second end provides the target load signal; The power supply has a first terminal and a second terminal, wherein the first terminal receives the test control command and the second terminal provides the target voltage signal.

2. The test system for a power network module according to claim 1, characterized in that, The testing system also includes a CAN module; The fault detection module is connected to the host computer via the CAN module.

3. The test system for power network modules according to claim 1, characterized in that, The testing system also includes a test harness; The fault detection module, the load module, and the power supply are all connected to the device under test via the test harness.

4. The test system for a power network module according to claim 3, characterized in that, The fault detection module includes: The control unit is used to control the fault detection module to collect the monitoring signal corresponding to the device under test, and to control the fault detection module to generate the target fault signal. A signal output unit is used to provide the target fault signal to the device under test; A signal acquisition unit is used to acquire the monitored signal corresponding to the device under test. The communication unit is connected to the CAN module, receives the test control commands provided by the host computer through the CAN module, and provides the signal to be monitored to the host computer.

5. A test system for a power network module according to claim 4, characterized in that... The signal output unit includes a switch signal output unit and an analog signal output unit; The target fault signals include short-circuit fault signals, open-circuit fault signals, and voltage fault signals; The switch signal output unit is used to generate and output the short-circuit fault signal and / or the open-circuit fault signal; The analog signal output unit is used to generate and output the voltage fault signal.

6. The test system for a power network module according to claim 4, characterized in that, The signal acquisition unit includes a switch signal acquisition unit, an analog signal acquisition unit, a thermocouple acquisition unit, and a current signal acquisition unit; The signals to be monitored include high and low level signals, test voltage signals, test current signals, and test temperature; The switch signal acquisition unit is used to acquire and determine the level signal; The analog signal acquisition unit is used to acquire the test voltage signal; The thermocouple acquisition unit is used to acquire the test temperature; The current signal acquisition unit is used to acquire the test current signal.

7. A test system for a power network module according to claim 4, characterized in that, The fault detection module also includes a device triggering unit; The device triggering unit provides a pulse width modulation signal to trigger the dormant device under test.

8. A test system for a power network module according to claim 1, characterized in that, The target voltage signal corresponds to a voltage range of 0~80V.

9. A test system for a power network module according to claim 1, characterized in that, The current range corresponding to the target load signal is 0~240A.

10. A test system for a power network module according to claim 1, characterized in that, The target temperature corresponds to a temperature range of -40℃ to 120℃.

Images