A vehicle onboard networked controller test system

Abstract

The utility model embodiment provides a kind of vehicle-mounted networking controller test system, comprising: microcontroller and respectively through signal transmission channel and microcontroller electric connection's controller communication module, display module, CAN channel control module, power conversion module, controller power module, airbag simulation module, key simulation module, LED simulation module, reserved resistive load simulation module;The voltage output end of power conversion module is respectively electrically connected with the power input end of microcontroller, the power input end of controller communication module, the power input end of display module, the power input end of CAN channel control module, the power input end of controller power module, the power input end of airbag simulation module, the power input end of key simulation module, the power input end of LED simulation module and the power input end of reserved resistive load simulation module, shorten the test system development and debugging time, improve the efficiency of controller development and test.

Description

Technical Field

[0001] This utility model relates to the field of vehicle controller testing technology, and more specifically, to a vehicle network controller testing system. Background Technology

[0002] With the rapid development of new energy vehicles, automobiles are gradually evolving into intelligent interconnected terminals. As a core communication module, the Telematics Box (TBOX) faces increasingly stringent requirements for functionality and reliability. During development, the TBOX must undergo rigorous standardized testing to verify its performance, including communication protocol compatibility, network stability, and environmental adaptability. However, existing testing technologies have the following problems:

[0003] First, customized development is inefficient: For different models of vehicle networking controllers, it is necessary to design a dedicated test system and supporting equipment, and to carry out customized development and debugging based on the specific communication interface, protocol and electrical parameters of the controller. This results in a long test system development cycle, which seriously restricts the development progress of the controller.

[0004] Second, the reliability of the test system is insufficient: the newly developed test system lacks sufficient experimental verification, and the stability of its own hardware is questionable. If abnormal phenomena occur during the test, it is difficult to quickly locate whether it is a defect in the test system or a fault in the controller under test, which increases the complexity of troubleshooting and affects the accuracy of the test results.

[0005] Third, poor resource reusability: Existing testing solutions lack standardized and modular design, and the compatibility between different testing systems is low, resulting in repeated investment in equipment and high testing costs.

[0006] Therefore, there is an urgent need for a universal and highly reliable vehicle network controller testing system to solve the problems of low testing efficiency, insufficient system reliability and resource waste in the existing technology, thereby accelerating the product development process. Utility Model Content

[0007] This application provides a vehicle networking controller testing system to solve at least one of the problems in the prior art.

[0008] According to an embodiment of this application, a vehicle network controller test system is provided, including: a microcontroller, a controller communication module, a display module, a CAN channel control module, a power conversion module, a controller power supply module, an airbag simulation module, a button simulation module, an LED simulation module, and a reserved resistive load simulation module;

[0009] The controller communication module, the display module, the CAN channel control module, the power conversion module, the controller power supply module, the airbag simulation module, the button simulation module, the LED simulation module, and the reserved resistive load simulation module are all electrically connected to the microcontroller through signal transmission channels. The voltage output terminal of the power conversion module is electrically connected to the power input terminals of the microcontroller, the controller communication module, the display module, the CAN channel control module, the controller power supply module, the airbag simulation module, the button simulation module, the LED simulation module, and the reserved resistive load simulation module, respectively.

[0010] In some embodiments of this application, the power conversion module includes a primary DC power supply module, a first secondary DC power supply module, a second secondary DC power supply module, and a secondary adjustable DC power supply module;

[0011] The voltage output terminal of the primary DC power supply module is electrically connected to the voltage input terminals of the first secondary DC power supply module, the second secondary DC power supply module, and the secondary adjustable DC power supply module, respectively. The voltage output terminal of the first secondary DC power supply module is electrically connected to the power input terminals of the microcontroller, the controller communication module, the display module, the CAN channel control module, the button simulation module, the LED simulation module, and the reserved resistive load simulation module, respectively. The voltage output terminal of the second secondary DC power supply module is electrically connected to the power input terminal of the airbag simulation module. The voltage output terminal of the secondary adjustable DC power supply module is electrically connected to the power input terminal of the controller power supply module.

[0012] In some embodiments of this application, the controller power supply module includes a power positive controllable switch, a power negative controllable switch, and an IGN controllable switch;

[0013] The two ends of the power supply positive controllable switch are electrically connected to the positive output terminal of the secondary adjustable DC power supply module of the power conversion module and the positive input terminal of the vehicle network controller under test, respectively. The two ends of the power supply negative controllable switch are electrically connected to the negative output terminal of the secondary adjustable DC power supply module of the power conversion module and the negative input terminal of the vehicle network controller under test, respectively. The two ends of the IGN controllable switch are electrically connected to the positive output terminal of the secondary adjustable DC power supply module of the power conversion module and the IGN input terminal of the vehicle network controller under test, respectively. Furthermore, the power supply positive controllable switch, the power supply negative controllable switch, and the IGN controllable switch are all electrically connected to the microcontroller through signal transmission channels.

[0014] In some embodiments of this application, the controller power supply module further includes a power supply current detection and control module;

[0015] The power supply current detection and control module is located between the controllable positive switch of the power supply and the positive input terminal of the vehicle network controller under test, and the power supply current detection and control module is electrically connected to the microcontroller through a signal transmission channel.

[0016] In some embodiments of this application, the button simulation module includes a button controller and a plurality of button sub-simulation modules. Each button sub-simulation module is electrically connected to the button controller through a signal transmission channel, and the button controller is electrically connected to the microcontroller through a signal transmission channel. The voltage output terminal of the power conversion module is electrically connected to the power input terminal of the button controller and the power input terminal of each button sub-simulation module.

[0017] In some embodiments of this application, each of the button sub-simulation modules includes a button sub-simulation power supply module, a button sub-simulation communication module, a button sub-simulation controllable switch, a button resistive load simulation module, a first button port, and a second button port.

[0018] The voltage input terminal of the button-simulated power supply module is electrically connected to the voltage output terminal of the power conversion module. The voltage output terminal of the button-simulated power supply module is electrically connected to the power input terminal of the button-simulated communication module and the power input terminal of the button-simulated resistive load module, respectively. The button-simulated communication module is electrically connected to the microcontroller and the button-simulated resistive load module, respectively, through a signal transmission channel. The button controller is electrically connected to the button-simulated controllable switch through a signal transmission channel. The two ends of the button-simulated controllable switch are electrically connected to the first button port and the button-simulated resistive load module, respectively. The second button port is electrically connected to the button-simulated resistive load module. The first button port and the second button port are respectively connected to the port of the vehicle network controller under test.

[0019] In some embodiments of this application, the LED simulation module includes several LED sub-simulation modules, each of which includes an LED sub-simulation power supply module, an LED sub-simulation communication module, and an LED resistive load simulation module;

[0020] The voltage input terminal of the LED sub-simulation power supply module is electrically connected to the voltage output terminal of the power conversion module. The voltage output terminal of the LED sub-simulation power supply module is electrically connected to the power input terminal of the LED sub-simulation communication module and the power input terminal of the LED resistive load simulation module, respectively. The LED sub-simulation communication module is electrically connected to the microcontroller and the LED resistive load simulation module through a signal transmission channel, respectively. The input and output terminals of the LED resistive load simulation module are respectively connected to the ports of the vehicle network controller under test.

[0021] In some embodiments of this application, the reserved resistive load simulation module includes several reserved resistive load sub-simulation modules;

[0022] Each of the reserved resistive load sub-simulation modules includes a resistive load controller, a resistive load current detection and control module, n resistors, and n resistive load controllable switches. The resistive load controller is electrically connected to the microcontroller and the resistive load current detection and control module via a signal transmission channel. The current input terminal of the resistive load current detection and control module is electrically connected to the voltage input interface of the reserved resistive load sub-simulation module. The n resistors are connected in series to form a voltage divider circuit, and the starting terminal of the voltage divider circuit is electrically connected to the current output terminal of the resistive load current detection and control module. One end of each resistor is connected to a resistive load controllable switch. The second terminals of all the resistive load controllable switches are connected to the voltage output interface of the reserved resistive load sub-simulation module. The resistive load controller is electrically connected to each resistive load controllable switch via a signal transmission channel. Wherein, n≥20.

[0023] In some embodiments of this application, each of the reserved resistive load sub-simulation modules further includes multiple decoders. The resistive load controller is connected to each decoder through a signal transmission channel, and each decoder is electrically connected to at least one of the resistive load controllable switches through a signal transmission channel, so that all the resistive load controllable switches are electrically connected to the resistive load controller through one decoder.

[0024] In some embodiments of this application, the display module is a touch screen.

[0025] The beneficial effects of the embodiments of this application are as follows:

[0026] This vehicle network controller testing system adopts a fixed hardware architecture design, which is applicable to reliability testing of different types of vehicle network controllers. It can be used by inputting the configuration parameters of each module through a touch screen according to the characteristics of the connected vehicle network controller. Moreover, the working mode of each module can be changed in real time through the host computer during system operation. This solves the problem that different types of vehicle network controllers need to be customized with different testing systems when conducting reliability tests, shortens the development and debugging time of the testing system, and improves the efficiency of vehicle network controller development and testing. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or 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.

[0028] Figure 1 A block diagram of a vehicle network controller test system provided in this application embodiment;

[0029] Figure 2 A schematic diagram of the composition of the controller power supply module in a vehicle networking controller test system provided in this application embodiment;

[0030] Figure 3 A schematic diagram of the composition of a key sub-module in a vehicle network controller test system provided in this application embodiment;

[0031] Figure 4 A schematic diagram of the composition of an LED sub-simulation module in a vehicle networking controller test system provided in this application embodiment;

[0032] Figure 5 This is a schematic diagram of the composition of a reserved resistive load sub-simulation module in a vehicle network controller test system provided in an embodiment of this application. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0034] It should be noted that the terms "comprising" and "having," and any variations thereof, in the embodiments and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, it may include a series of structures, without being limited to the structures listed, but may optionally include structures not listed, or may optionally include other components inherent to these structures.

[0035] This application discloses a vehicle networking controller testing system, which is universal and highly reliable. It solves the problems of low testing efficiency, insufficient system reliability, and resource waste in the prior art, shortens the development and debugging time of the testing system, and improves the efficiency of vehicle networking controller development and testing. Detailed descriptions follow.

[0036] Figure 1 An on-board network controller test system according to an embodiment of this application is shown. Figure 1 As shown, the vehicle network controller test system includes: a microcontroller 1, a controller communication module 2, a display module 3, a CAN channel control module 4, a power conversion module 5, a controller power supply module 6, an airbag simulation module 7, a button simulation module 8, an LED simulation module 9, and a reserved resistive load simulation module 10. Specifically, controller communication module 2, display module 3, CAN channel control module 4, power conversion module 5, controller power supply module 6, airbag simulation module 7, button simulation module 8, LED simulation module 9, and reserved resistive load simulation module 10 are electrically connected to microcontroller 1 through signal transmission channels. The voltage output terminal of power conversion module 5 is electrically connected to the power input terminals of microcontroller 1, controller communication module 2, display module 3, CAN channel control module 4, controller power supply module 6, airbag simulation module 7, button simulation module 8, LED simulation module 9, and reserved resistive load simulation module 10, respectively. Thus, power conversion module 5 provides power to microcontroller 1, controller communication module 2, display module 3, CAN channel control module 4, controller power supply module 6, airbag simulation module 7, button simulation module 8, LED simulation module 9, and reserved resistive load simulation module 10. "Electrically connected to microcontroller 1 via signal transmission channel" means that microcontroller 1 receives corresponding signals and / or sends drive signals via signal transmission channel. For example, microcontroller 1 is electrically connected to the drive circuit of controller power supply module 6 via signal line. The drive circuit is fixed on the substrate of controller power supply module 6 and is used to receive the switching signal output by microcontroller 1 and drive controller power supply module 6 to operate.

[0037] In the embodiments of this application, such as Figure 1As shown, the controller communication module 2 is used for communication between the microcontroller 1 and the host computer, transmitting system data to the host computer of the personal computer terminal (PC) or receiving data from the host computer of the PC. The display module 3 is used to display system parameters; furthermore, the display module 3 is a touch screen and can also be used to input control parameters. The CAN channel control module 4 is used for data transmission management, communication control for multi-device coordination, and for testing the multi-channel vehicle networking controller. The host computer on the PC is connected to the microcontroller 1 via buses such as 485 and CAN. The microcontroller 1 is connected to the controllers of each module (e.g., the button controller 81 of the button simulation module 8) via the CAN bus. When using this vehicle networking controller test system for testing, before the system starts working, the system can set the configuration parameters of each module through the display module 3. When the system is working, the host computer can send control commands to the microcontroller 1 in real time to control the operation of each module.

[0038] In some embodiments, such as Figure 1 As shown, the power conversion module 5 includes a primary DC power supply module 51, a first secondary DC power supply module 52, a second secondary DC power supply module 53, and a second adjustable DC power supply module 54. Specifically, the voltage output terminal of the primary DC power supply module 51 is electrically connected to the voltage input terminals of the first secondary DC power supply module 52, the second secondary DC power supply module 53, and the second adjustable DC power supply module 54, respectively. The voltage output terminal of the first secondary DC power supply module 52 is electrically connected to the power input terminals of the microcontroller 1, the controller communication module 2, the display module 3, the CAN channel control module 4, the button simulation module 8, the LED simulation module 9, and the reserved resistive load simulation module 10, respectively. The voltage output terminal of the second secondary DC power supply module 53 is electrically connected to the power input terminal of the airbag simulation module 7. The voltage output terminal of the second adjustable DC power supply module 54 is electrically connected to the power input terminal of the controller power supply module 6. This application, through the design of a primary DC power supply module 51, a first secondary DC power supply module 52, a second secondary DC power supply module 53, and a secondary adjustable DC power supply module 54, makes it easier to perform voltage reduction processing.

[0039] In some specific embodiments, the primary DC power supply module 51 may specifically include a transformer, a rectifier bridge, a filter capacitor, and a voltage regulator chip. The primary winding of the transformer is welded to the AC power line connected to the system. The input terminal of the rectifier bridge is welded to the secondary winding of the transformer. The output terminal is connected to the positive pin of the filter capacitor through copper foil traces. The negative pin of the filter capacitor is grounded. The IN pin of the voltage regulator chip is electrically connected to the positive pin of the filter capacitor. The OUT pin outputs the primary DC power supply. Thus, the primary DC power supply module 51 converts the input AC power into a primary DC power supply, which is then further converted into a secondary DC power supply by the first secondary DC power supply module 52, the second secondary DC power supply module 53, and the secondary adjustable DC power supply module 54, thereby facilitating voltage reduction. Both the first and second-level DC power supply modules 52 and 53 can include a transformer, a control chip, a MOSFET, a sampling resistor, a rectifier diode, and a filter capacitor. One end of the primary winding of the transformer is soldered to the output terminal of the first-level DC power supply. The secondary winding is connected in parallel with the filter capacitor through the rectifier diode, thus providing the second-level DC power supply at the output terminal. The sampling resistor is connected to the output terminal and to the control chip. The control chip is connected to the MOSFET, and the MOSFET is connected to the other end of the primary winding of the transformer. Alternatively, the second-level adjustable DC power supply module 54 can also include a transformer, a control chip, a MOSFET, a sampling resistor, a voltage follower, a comparator, an optocoupler, a rectifier diode, and a filter capacitor. One end of the primary winding of the transformer is soldered to the output terminal of the first-level DC power supply. The secondary winding is connected in parallel with the filter capacitor through the rectifier diode, thus providing the second-level DC power supply at the output terminal. One end of the sampling resistor is connected to the output terminal, and the other end is connected to the voltage follower. The voltage follower is connected to one end of the comparator. The output of the comparator is connected to the optocoupler, which is connected to the control chip. The control chip is connected to the MOSFET, and the MOSFET is connected to the other end of the primary winding of the transformer. By adjusting the reference terminal voltage of the comparator, the output pin provides a two-stage adjustable DC power supply. It should be noted that the aforementioned embodiments regarding the primary DC power supply module 51, the first secondary DC power supply module 52, the second secondary DC power supply module 53, and the second adjustable DC power supply module 54 are merely typical implementations of this application. Any reasonable substitutions or modifications made by those skilled in the art based on the inventive concept of this application, concerning the circuit topology and component selection, that achieve the same technical effect should be considered to fall within the protection scope of this application.

[0040] In other embodiments, such as Figure 1 and Figure 2As shown, the controller power supply module 6 mainly includes a positive controllable switch 61, a negative controllable switch 62, and an IGN controllable switch 63. Specifically, the two ends of the positive controllable switch 61 are electrically connected to the positive output terminal of the secondary adjustable DC power supply module 54 of the power conversion module 5 and the positive input terminal of the vehicle network controller under test, respectively. The two ends of the negative controllable switch 62 are electrically connected to the negative output terminal of the secondary adjustable DC power supply module 54 of the power conversion module 5 and the negative input terminal of the vehicle network controller under test, respectively. The two ends of the IGN controllable switch 63 are electrically connected to the positive output terminal of the secondary adjustable DC power supply module 54 of the power conversion module 5 and the IGN input terminal of the vehicle network controller under test, respectively. Furthermore, the positive controllable switch 61, the negative controllable switch 62, and the IGN controllable switch 63 are all electrically connected to the microcontroller 1 through signal transmission channels. This application utilizes the design of a power supply positive controllable switch 61, a power supply negative controllable switch 62, and an IGN controllable switch 63 for power supply hardware testing and IGN-related functional testing of an in-vehicle network controller. Furthermore, the controller power supply module 6 also includes a power supply current detection and control module 64. The power supply current detection and control module 64 is positioned between the power supply positive controllable switch 61 and the positive input terminal of the in-vehicle network controller under test. The power supply current detection and control module 64 is electrically connected to the microcontroller 1 via a signal transmission channel, thus serving to protect the circuit.

[0041] The IGN input terminal of the vehicle network controller under test refers to the interface on the vehicle network controller under test used to receive the ignition switch (IGN) signal.

[0042] Both the positive input and IGN input originate from the positive terminal of the secondary adjustable DC power supply module 54 of the power conversion module 5, while the negative input originates from the negative terminal of the secondary adjustable DC power supply module 54. The control signals for the power supply positive controllable switch 61, the power supply negative controllable switch 62, and the IGN controllable switch 63 originate from the microcontroller 1. The current detection signal from the power supply current detection and control module 64 is transmitted to the microcontroller 1 via the control signal port. When testing the vehicle network controller under test, the positive output port of the controller power supply module 6 is electrically connected to the positive input terminal of the vehicle network controller under test, the negative output port of the controller power supply module 6 is electrically connected to the negative input terminal of the vehicle network controller under test, and the IGN output port of the controller power supply module 6 is electrically connected to the IGN input terminal of the vehicle network controller under test. The positive input and positive output are connected via the power supply positive controllable switch 61 and the power supply current detection and control module 64. When the power supply positive controllable switch 61 is closed and the current detection is normal, the positive input and positive output are connected. A power supply negative controllable switch 62 connects the negative input and negative output. When the power supply negative controllable switch 62 is closed, the negative input and negative output are connected. Furthermore, when both positive and negative terminals are connected, power can be supplied to the connected vehicle network controller under test, thereby testing its related power supply hardware. An IGN controllable switch 63 connects the IGN input and IGN output. When the IGN controllable switch 63 is closed, the IGN input and IGN output are connected. For example, if the microcontroller 1 has an IGN-controlled sleep / wake-up function, the microcontroller 1 can control the sleep / wake-up of the vehicle network controller under test through the IGN controllable switch 63. In addition, the power supply current detection and control module 64 can detect the power supply output current. The current detection signal is transmitted to the microcontroller 1, which can control the power supply positive controllable switch 61 according to the user-input current safety threshold, thereby protecting the circuit. That is, the power supply current detection and control module 64 has two functions: current detection and circuit control. For example, when the detected current exceeds a preset threshold, the positive circuit channel is disconnected.

[0043] In some specific embodiments, the positive controllable switch 61 can use a 74HC245 buffer and an SI2302 MOSFET, the negative controllable switch 62 can use a TLP521 optocoupler and a G5LE relay, and the IGN controllable switch 63 can use a ULN2003 driver and a BD139 transistor. The microcontroller 1 implements switch control through the following hardware structure: positive control channel: PC0 pin of microcontroller 1 → 74HC245 buffer → SI2302 MOSFET; negative control channel: PC1 pin of microcontroller 1 → TLP521 optocoupler → G5LE relay; IGN control channel: PC2 pin of microcontroller 1 → ULN2003 driver → BD139 transistor; all power devices are mounted on the PCB heat dissipation area. It should be noted that the aforementioned specific embodiments of the power supply positive controllable switch 61, the power supply negative controllable switch 62, and the IGN controllable switch 63 are merely typical implementations of this application. Any reasonable substitutions or modifications made by those skilled in the art based on the inventive concept of this application to the circuit topology and component selection, as long as they can achieve the same technical effect, should be considered to fall within the protection scope of this application.

[0044] In the embodiments of this application, such as Figure 1 As shown, the airbag simulation module 7 is used to provide a simulated airbag input signal to the vehicle network controller under test, thereby providing a simulated airbag input for testing. Of course, if the vehicle network controller under test does not have an airbag signal detection function, the airbag simulation module 7 may not be configured during the test.

[0045] In other embodiments, such as Figure 1 and Figure 3 As shown, the button simulation module 8 includes a button controller 81 and several button sub-simulation modules 82. Each button sub-simulation module 82 is electrically connected to the button controller 81 via a signal transmission channel, and the button controller 81 is electrically connected to the microcontroller 1 via a signal transmission channel. The voltage output terminal of the power conversion module 5 is electrically connected to the power input terminal of the button controller 81 and the power input terminal of each button sub-simulation module 82. This application uses the design of the button controller 81 and several button sub-simulation modules 82 to simulate the input signals of physical buttons inside a vehicle to verify the function, reliability, and response logic of the vehicle networking controller. The number of button sub-simulation modules 82 can be configured according to actual needs.

[0046] Furthermore, each button sub-simulation module 82 includes a button sub-simulation power supply module 821, a button sub-simulation communication module 822, a button sub-simulation controllable switch 823, a button resistive load simulation module 824, a first button port 825, and a second button port 826. In detail, the voltage input terminal of the button analog power supply module 821 is electrically connected to the voltage output terminal of the power conversion module 5. The voltage output terminal of the button analog power supply module 821 is electrically connected to the power input terminal of the button analog communication module 822 and the power input terminal of the button resistive load analog module 824, respectively. The button analog communication module 822 is electrically connected to the microcontroller 1 and the button resistive load analog module 824, respectively, through a signal transmission channel. The button controller 81 is electrically connected to the button analog controllable switch 823 through a signal transmission channel. The two ends of the button analog controllable switch 823 are electrically connected to the first button port 825 and the button resistive load analog module 824, respectively. The second button port 826 is electrically connected to the button resistive load analog module 824. The first button port 825 and the second button port 826 are respectively connected to the ports of the vehicle network controller under test. The button simulation power supply module 821 provides power to the button simulation controllable switch 823 and the button resistive load simulation module 824. The button simulation communication module 822 is used for communication between the button resistive load simulation module 824 and the microcontroller 1. The button simulation control signal comes from the button controller 81 and is used to control the closing and opening of the button simulation controllable switch 823 to simulate the closing and opening of the button. In some optional embodiments, the button resistive load simulation module 824 can be configured to have a resistor attached to the button. For example, if the resistance value of the button resistive load simulation module 824 is configured to be 0, then the button simulation controllable switch 823 of the button simulation module 82 is directly connected to the second button port 826. If the resistance value of the button resistive load simulation module 824 is configured to be R, then a resistor with a resistance value of R is connected in series between the button simulation controllable switch 823 and the second button port 826. This facilitates the simulation of different buttons. The first button port 825 and the second button port 826 are used as actual access ports to the vehicle network controller under test.

[0047] In some specific embodiments, the key analog power supply module 821 may include an LM2596 step-down chip and peripheral circuitry to provide power to the key analog controllable switch 823 and the key resistive load analog module 824 by stepping down the voltage; the key analog communication module 822 may use a TJA1050 CAN transceiver with a baud rate configurable to 500kbps to enable communication between the key resistive load analog module 824 and the microcontroller 1; the key analog controllable switch 823 may be composed of an SI2302 MOSFET and a PC817 optocoupler to automatically close or open based on signals; the key resistive load analog module 824... Figure 5In the implementation of the resistive load simulation module scheme shown, the microcontroller 1 can send control commands to the button resistive load simulation module through the button analog communication module 822 to configure whether the button is equipped with a resistor. It should be noted that the specific embodiments of the button analog power supply module 821, button analog communication module 822, button analog controllable switch 823, and button resistive load simulation module 824 described above are only typical implementations of this application. Reasonable substitutions or modifications made by those skilled in the art based on the inventive concept of this application to the circuit topology and component selection, as long as the same technical effect can be achieved, should be considered to fall within the protection scope of this application.

[0048] In other embodiments, such as Figure 1 and Figure 4 As shown, the LED simulation module 9 includes several LED sub-simulation modules 91. Each LED sub-simulation module 91 includes an LED sub-simulation power supply module 911, an LED sub-simulation communication module 912, and an LED resistive load simulation module 913. Specifically, the voltage input terminal of the LED sub-simulation power supply module 911 is electrically connected to the voltage output terminal of the power conversion module 5. The voltage output terminal of the LED sub-simulation power supply module 911 is electrically connected to the power input terminals of the LED sub-simulation communication module 912 and the LED resistive load simulation module 913, respectively. The LED sub-simulation communication module 912 is electrically connected to the microcontroller 1 and the LED resistive load simulation module 913 through a signal transmission channel. The input and output terminals of the LED resistive load simulation module 913 are connected to the ports of the vehicle network controller under test. This application provides multiple LED simulated loads for the vehicle networking controller through the design of several LED sub-simulation modules 91. By controlling the functions of the LED sub-simulation modules 91, test scenarios of LED short circuit, open circuit and normal operation are provided for the vehicle networking controller, so as to test whether the LED driving circuit of the vehicle networking controller meets the requirements.

[0049] The number of LED sub-simulation modules 91 can be adapted according to actual needs. The LED sub-simulation power supply module 911 supplies power to the LED resistive load simulation module 913. The LED sub-simulation communication module 912 is used for communication between the LED resistive load simulation module 913 and the microcontroller 1. The microcontroller 1 sends the configured resistance value command to the LED resistive load simulation module 913 via the bus and the LED sub-simulation communication module 912. The input and output terminals of the LED resistive load simulation module 913 (i.e., the input and output of the LED sub-simulation module 91) are used as ports for connecting to the vehicle network controller under test.

[0050] In some specific embodiments, the LED sub-analog power supply module 911 may include an LM2596 step-down chip and peripheral circuitry to provide power to the LED resistive load analog module 913 by stepping down the voltage; the LED sub-analog communication module 912 may use a TJA1050 CAN transceiver with a baud rate configurable to 500kbps, thereby enabling communication between the LED resistive load analog module 913 and the microcontroller 1; the LED resistive load analog module 913 is configured according to... Figure 5 The resistive load simulation module scheme shown is configured according to the resistance value instruction of microcontroller 1. It should be noted that the specific embodiments of the LED sub-simulation power supply module 911, LED sub-simulation communication module 912, and LED resistive load simulation module 913 described above are only typical implementations of this application. Reasonable substitutions or modifications made by those skilled in the art based on the inventive concept of this application to the circuit topology and component selection, as long as the same technical effect can be achieved, should be considered to fall within the protection scope of this application.

[0051] In other embodiments, such as Figure 1 and Figure 5 As shown, the reserved resistive load simulation module 10 includes several reserved resistive load sub-simulation modules 101. This application provides a resistive load for the vehicle networking controller to verify the performance of the drive circuit through the design of several reserved resistive load sub-simulation modules 101. Each reserved resistive load sub-simulation module 101 includes a resistive load controller 1011, a resistive load current detection and control module 1012, n resistors, and n resistive load controllable switches. Specifically, the resistive load controller 1011 is electrically connected to the microcontroller 1 and the resistive load current detection and control module 1012 respectively through a signal transmission channel. The current input terminal of the resistive load current detection and control module 1012 is electrically connected to the voltage input interface of the reserved resistive load sub-simulation module 101. The n resistors are connected in series to form a voltage divider circuit, and the starting terminal of the voltage divider circuit is electrically connected to the current output terminal of the resistive load current detection and control module 1012. One end of each resistor is connected to a resistive load controllable switch. The second terminals of all resistive load controllable switches are connected to the voltage output interface of the reserved resistive load sub-simulation module 101. The resistive load controller 1011 is electrically connected to each resistive load controllable switch respectively through a signal transmission channel. Furthermore, each reserved resistive load sub-analysis module 101 also includes multiple decoders 1013. The resistive load controller 1011 is connected to each decoder 1013 through a signal transmission channel, and each decoder 1013 is electrically connected to at least one resistive load controllable switch through a signal transmission channel, so that all resistive load controllable switches are electrically connected to the resistive load controller 1011 through one decoder 1013.

[0052] Where n ≥ 20. The n resistors are denoted as resistor R1, resistor R2, ..., resistor R... n The n resistive load controllable switches are denoted as switch S1, switch S2, ..., switch S... n Furthermore, resistor R1 to resistor R 10 To compensate for the resistance, the selected resistance value is one order of magnitude smaller than the accuracy of the reserved resistive load sub-analysis module 101. Resistor R n-9 To resistor R n The actual resistor that simulates the resistance value of the reserved resistive load sub-module 101. Switches S1 to S2 n This is a controllable switch used to control the actual number of resistors used, and to control the number of compensation resistors used according to the control signal sent by the resistive load controller 1011, so as to ensure the accuracy of the reserved resistive load sub-simulation module 101. The resistive load controller 1011 communicates with the microcontroller 1 through a communication bus. The microcontroller 1 can send control commands to the resistive load controller 1011 through the communication bus. The resistive load controller 1011 controls switch S1 to switch S2 according to the control commands. n The circuit controls the opening and closing of each switch. The resistive load current detection and control module 1012 detects the operating current of the reserved resistive load sub-simulation module 101 during actual operation. If the operating current exceeds a preset threshold, the module stops operating, protecting both the reserved resistive load sub-simulation module 101 and the vehicle network controller under test. Furthermore, the decoder 1013 is directly connected to the resistive load controller 1011 and the resistive load controllable switch, expanding the number of I / O pins of the resistive load controller 1011.

[0053] The above describes the various components of the vehicle networking controller test system provided in this embodiment and their interconnections. The following section will discuss further details. Figure 1 – Figure 5 The working principle of the vehicle network controller test system is described in detail.

[0054] When using this vehicle network controller test system for testing, before the system starts working, the type of signal to be output by the airbag simulation module 7 can be input through the display module 3. When the system is working, the host computer can control the signal parameters in real time, and this signal is used as the input of the vehicle network controller under test.

[0055] Before the system starts working, the number and type of buttons in the button simulation module 8 can be input through the display module 3. When the system is working, the host computer can control the opening and closing of the buttons in real time.

[0056] Before the system starts working, the number and type of LEDs in the LED simulation module 9 can be input through the display module 3. In addition, the characteristic curve of the simulated LED resistor can be input to simulate the scenario where the resistance value of the LED changes during actual operation, such as simulating short circuit, open circuit, etc.

[0057] Before the system starts working, the number and type of load of the reserved resistive load simulation module 10 can be input through the display module 3. In addition, corresponding parameters can be input according to the resistance characteristics of the simulated object.

[0058] Before the system starts working, the number of input terminals and the number of output terminals of the CAN channel control module 4 can be input through the display module 3. The host computer can control the channel mapping relationship for testing the multi-channel vehicle networking controller.

[0059] The vehicle networking controller under test (VDC) has six CAN channels that require CAN transmission and reception testing. The system can test all six CAN channels using only one CAN1 interface. First, connect all six CAN channels of the VDC to the system. Then, input through display module 3: 1 input and 6 outputs. The host computer sends a CAN1 test command (1-to-1 mapping). The VDC's CAN1 interface connects to the system's CAN1 interface, allowing the CAN1 test to proceed. After the VDC's CAN1 test is complete, the host computer sends a CAN2 test command (1-to-2 mapping). The VDC's CAN1 interface disconnects from the system's CAN1 interface, and the VDC's CAN2 interface connects to the system's CAN1 interface, allowing the CAN2 test to proceed. Similarly, CAN3, 4, 5, and 6 tests can be performed. The disconnection and connection of the CAN channels are automatically completed by the system according to commands.

[0060] The host computer can control the power supply voltage output by the controller power supply module 6 via microcontroller 1 to test the performance of the vehicle networking controller under test under different voltages. It can also control the opening and closing of the IGN in real time via microcontroller 1 to test the IGN triggering function of the vehicle networking controller with IGN functionality. Furthermore, since each module is connected to the system's microcontroller 1 via the CAN bus, more functional modules can be expanded based on this hardware structure as needed.

[0061] In summary, this application discloses a vehicle network controller test system with a fixed hardware architecture, which is applicable to reliability testing of different types of vehicle network controllers. The system can be used by inputting configuration parameters of each module via a touchscreen, based on the characteristics of the connected vehicle network controller. Furthermore, the operating mode of each module can be changed in real time via a host computer during system operation. This solves the problem of needing to customize different test systems for different types of vehicle network controllers during reliability testing, shortens the development and debugging time of the test system, and improves the efficiency of controller development and testing.

[0062] It will be understood by those skilled in the art that the accompanying drawings are merely schematic diagrams of one embodiment, and the components shown in the drawings are not necessarily essential for implementing this invention. It should also be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0063] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0064] Finally, it should be noted that the above-described embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model. These modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope described in the claims.

Claims

1. A vehicle-mounted network controller test system, characterized in that, include: Microcontroller, controller communication module, display module, CAN channel control module, power conversion module, controller power supply module, airbag simulation module, button simulation module, LED simulation module, and reserved resistive load simulation module; The controller communication module, the display module, the CAN channel control module, the power conversion module, the controller power supply module, the airbag simulation module, the button simulation module, the LED simulation module, and the reserved resistive load simulation module are all electrically connected to the microcontroller through signal transmission channels. The voltage output terminal of the power conversion module is electrically connected to the power input terminals of the microcontroller, the controller communication module, the display module, the CAN channel control module, the controller power supply module, the airbag simulation module, the button simulation module, the LED simulation module, and the reserved resistive load simulation module, respectively.

2. The vehicle networking controller test system according to claim 1, characterized in that, The power conversion module includes a primary DC power supply module, a first secondary DC power supply module, a second secondary DC power supply module, and a secondary adjustable DC power supply module. The voltage output terminal of the primary DC power supply module is electrically connected to the voltage input terminals of the first secondary DC power supply module, the second secondary DC power supply module, and the secondary adjustable DC power supply module, respectively. The voltage output terminal of the first secondary DC power supply module is electrically connected to the power input terminals of the microcontroller, the controller communication module, the display module, the CAN channel control module, the button simulation module, the LED simulation module, and the reserved resistive load simulation module, respectively. The voltage output terminal of the second secondary DC power supply module is electrically connected to the power input terminal of the airbag simulation module. The voltage output terminal of the secondary adjustable DC power supply module is electrically connected to the power input terminal of the controller power supply module.

3. The vehicle networking controller test system according to claim 1, characterized in that, The controller power supply module includes a power positive controllable switch, a power negative controllable switch, and an IGN controllable switch; The two ends of the power supply positive controllable switch are electrically connected to the positive output terminal of the secondary adjustable DC power supply module of the power conversion module and the positive input terminal of the vehicle network controller under test, respectively. The two ends of the power supply negative controllable switch are electrically connected to the negative output terminal of the secondary adjustable DC power supply module of the power conversion module and the negative input terminal of the vehicle network controller under test, respectively. The two ends of the IGN controllable switch are electrically connected to the positive output terminal of the secondary adjustable DC power supply module of the power conversion module and the IGN input terminal of the vehicle network controller under test, respectively. Furthermore, the power supply positive controllable switch, the power supply negative controllable switch, and the IGN controllable switch are all electrically connected to the microcontroller through signal transmission channels.

4. The vehicle networking controller test system according to claim 3, characterized in that, The controller power supply module also includes a power supply current detection and control module; The power supply current detection and control module is located between the controllable positive switch of the power supply and the positive input terminal of the vehicle network controller under test, and the power supply current detection and control module is electrically connected to the microcontroller through a signal transmission channel.

5. The vehicle networking controller test system according to claim 1, characterized in that, The button simulation module includes a button controller and several button sub-simulation modules. Each button sub-simulation module is electrically connected to the button controller through a signal transmission channel, and the button controller is electrically connected to the microcontroller through a signal transmission channel. The voltage output terminal of the power conversion module is electrically connected to the power input terminal of the button controller and the power input terminal of each button sub-simulation module.

6. The vehicle networking controller test system according to claim 5, characterized in that, Each of the aforementioned button sub-simulation modules includes a button sub-simulation power supply module, a button sub-simulation communication module, a button sub-simulation controllable switch, a button resistive load simulation module, a first button port, and a second button port; The voltage input terminal of the button-simulated power supply module is electrically connected to the voltage output terminal of the power conversion module. The voltage output terminal of the button-simulated power supply module is electrically connected to the power input terminal of the button-simulated communication module and the power input terminal of the button-simulated resistive load module, respectively. The button-simulated communication module is electrically connected to the microcontroller and the button-simulated resistive load module, respectively, through a signal transmission channel. The button controller is electrically connected to the button-simulated controllable switch through a signal transmission channel. The two ends of the button-simulated controllable switch are electrically connected to the first button port and the button-simulated resistive load module, respectively. The second button port is electrically connected to the button-simulated resistive load module. The first button port and the second button port are respectively connected to the port of the vehicle network controller under test.

7. The vehicle networking controller test system according to claim 1, characterized in that, The LED simulation module includes several LED sub-simulation modules, each of which includes an LED sub-simulation power supply module, an LED sub-simulation communication module, and an LED resistive load simulation module. The voltage input terminal of the LED sub-simulation power supply module is electrically connected to the voltage output terminal of the power conversion module. The voltage output terminal of the LED sub-simulation power supply module is electrically connected to the power input terminal of the LED sub-simulation communication module and the power input terminal of the LED resistive load simulation module, respectively. The LED sub-simulation communication module is electrically connected to the microcontroller and the LED resistive load simulation module through a signal transmission channel, respectively. The input and output terminals of the LED resistive load simulation module are respectively connected to the ports of the vehicle network controller under test.

8. The vehicle networking controller test system according to claim 1, characterized in that, The reserved resistive load simulation module includes several reserved resistive load sub-simulation modules; Each of the reserved resistive load sub-simulation modules includes a resistive load controller, a resistive load current detection and control module, n resistors, and n resistive load controllable switches. The resistive load controller is electrically connected to the microcontroller and the resistive load current detection and control module via a signal transmission channel. The current input terminal of the resistive load current detection and control module is electrically connected to the voltage input interface of the reserved resistive load sub-simulation module. The n resistors are connected in series to form a voltage divider circuit, and the starting terminal of the voltage divider circuit is electrically connected to the current output terminal of the resistive load current detection and control module. One end of each resistor is connected to a resistive load controllable switch. The second terminals of all the resistive load controllable switches are connected to the voltage output interface of the reserved resistive load sub-simulation module. The resistive load controller is electrically connected to each resistive load controllable switch via a signal transmission channel. Wherein, n≥20.

9. The vehicle networking controller test system according to claim 8, characterized in that, Each of the reserved resistive load sub-simulation modules further includes multiple decoders. The resistive load controller is connected to each decoder through a signal transmission channel, and each decoder is electrically connected to at least one of the resistive load controllable switches through a signal transmission channel, so that all the resistive load controllable switches are electrically connected to the resistive load controller through one decoder.

10. The vehicle networking controller test system according to claim 1, characterized in that, The display module is a touch screen.

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