Vehicle test system

Abstract

The utility model discloses a vehicle test system, comprising an upper computer which comprises a first USB port and is used for generating a switch control signal based on a target test instruction and outputting the switch control signal through the first USB port; the input end of the combined switch module is connected with the first USB port, and the combined switch module is used for generating an analog signal and a digital signal based on the switch control instruction; and the switch control input port of the test bench is connected with the output end of the combined switch module, and the test bench is used for placing a to-be-tested vehicle system and testing vehicle devices of the to-be-tested vehicle system based on the analog signal and the digital signal. Therefore, according to the vehicle testing system, the analog signal and the digital signal are generated through the upper computer and the combined switch module, so that automatic control over the vehicle devices of the vehicle system to be tested is achieved, and compared with manual control in the related technology, the testing efficiency is improved, and automatic testing of the vehicle testing system can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle testing, in particular to a vehicle testing system. Background Art

[0002] In related technologies, the testing of automobile body control systems with real electrical appliances is completed through manual testing. Specifically, on a test bench, the domain controller, electrical appliances (lamps, door handles, rearview mirrors, speakers, windows, tailgate), various combination switches, and programmable power supplies are connected in sequence using the entire vehicle wiring harness. This involves manually pressing mechanical buttons and flipping physical switches such as wipers and turn signals to turn the corresponding electrical appliances on and off. Testing is performed by observing the actions of the lamps, door handles, and wipers. Various switches must be manually operated during testing. However, this method has low testing efficiency and low test coverage. It cannot trigger multiple actions in a short period of time, and is even more incapable of scenario testing. Utility Model Content

[0003] The present invention aims to address, at least to a certain extent, one of the technical problems in the related art. To this end, the present invention provides a vehicle testing system that generates analog and digital signals through a host computer and a combination switch module to achieve automated control of vehicle components in the vehicle system under test. Compared to manual control in the related art, this improves testing efficiency and enables automated testing of the vehicle test system.

[0004] To achieve the above objectives, the present invention provides a vehicle testing system, comprising: a host computer, the host computer including a first USB (Universal Serial Bus) port, configured to generate a switch control signal based on a target test instruction and output the signal through the first USB port; a combination switch module, the input end of the combination switch module being connected to the first USB port and configured to generate an analog signal and a digital signal based on the switch control instruction; and a test bench, the switch control input port of the test bench being connected to the output end of the combination switch module and configured to accommodate a vehicle system to be tested and to test vehicle components of the vehicle system to be tested based on the analog signal and the digital signal.

[0005] According to the vehicle testing system of the present invention, a host computer includes a first USB port, an input end of a combination switch module is connected to the first USB port, and a switch control input port of a test bench is connected to an output end of the combination switch module. The host computer generates a switch control signal based on a target test instruction and outputs it through the first USB port. The combination switch module generates analog and digital signals based on the switch control instruction. The test bench is used to place the vehicle system to be tested and test the vehicle components of the vehicle system to be tested based on the analog and digital signals. Thus, the vehicle testing system generates analog and digital signals through the host computer and the combination switch module to achieve automated control of the vehicle components of the vehicle system to be tested. Compared to manual control in related technologies, this improves testing efficiency and enables automated testing of the vehicle testing system.

[0006] In addition, the vehicle testing system according to the above embodiment of the present invention may also have the following additional technical features:

[0007] Specifically, the switch control input end of the test bench includes an analog signal input end and a first digital signal input end, and the combination switch module includes: a control unit, an optocoupler isolation unit and a conditioning circuit board. The input end of the control unit is connected to the first USB port, the first output end of the control unit is connected to the analog signal input end, the second output end of the control unit is connected to the input end of the optocoupler isolation unit, the output end of the optocoupler isolation unit is connected to the input end of the conditioning circuit board, and the first output end of the conditioning circuit board is connected to the first digital signal input end.

[0008] Specifically, the switch control input end of the test bench also includes a second digital signal input end, and the combination switch module also includes: a relay, the relay is connected in series between the second digital signal input end and the first preset power supply end, and the control end of the relay is connected to the second output end of the conditioning circuit board.

[0009] Specifically, the optocoupler isolation unit includes at least one optocoupler isolation circuit, the second output end of the control unit includes a first IO (Input / Output) port and a second IO port corresponding to each optocoupler isolation circuit, one of the first IO port and the second IO port is grounded, and the optocoupler isolation circuit includes: a photocoupler, a first input end of the photocoupler is connected to the first IO port, a second input end of the photocoupler is connected to the second IO port, a first output end of the photocoupler is connected to a second preset power supply, and a second output end of the photocoupler is connected to the input end of the conditioning circuit board.

[0010] Specifically, the optocoupler isolation circuit further includes: a first resistor, which is connected in series between the first IO port and the first input terminal of the optocoupler.

[0011] Specifically, the optocoupler isolation circuit further includes: a second resistor, one end of the second resistor is connected to the first IO port; a light emitting diode, an anode of the light emitting diode is connected to the other end of the second resistor, and the other end of the light emitting diode is connected to the second IO port.

[0012] Specifically, the conditioning circuit board includes multiple conditioning circuits, and the conditioning circuit includes: a third resistor, one end of the third resistor is connected to the second output end of the optocoupler and has a first node, and the other end of the third resistor is grounded, wherein the first node serves as the output end of the conditioning circuit.

[0013] Furthermore, the vehicle test system also includes a CANOE (CAN open environment) module, and the host computer also includes a second USB port, which is connected to the first port of the CANOE module. The second port of the CANOE module is connected to the first bus communication terminal of the test bench via a CAN (Controller Area Network) bus, and the third port of the CANOE module is connected to the second bus communication terminal of the test bench via a LIN (Local Interconnect Network) bus.

[0014] Specifically, the host computer further includes an Ethernet port, and the system further includes a switch, a first end of the switch is connected to the Ethernet port, and a second end of the switch is connected to the Ethernet communication end of the test bench.

[0015] Specifically, the third terminal of the switch is connected to the external control system.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the connection of a vehicle testing system according to one embodiment of the present invention;

[0018] Figure 2 The figure is a connection diagram of a vehicle testing system according to a specific embodiment of the present utility model.

[0019] Figure 3 This is a wiring diagram of a conditioning circuit board according to a specific embodiment of the present utility model;

[0020] Figure 4 A circuit diagram of an optocoupler isolation unit and a conditioning circuit board according to a specific embodiment of the present utility model;

[0021] Figure 5Schematic diagram of software layering of a host computer according to a specific embodiment of the present invention;

[0022] Figure 6 The figure is a functional logic block diagram of a vehicle testing system according to a specific embodiment of the present utility model. DETAILED DESCRIPTION

[0023] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0024] The vehicle testing system proposed by the present invention will be described below with reference to the accompanying drawings.

[0025] Figure 1 FIG. 1 is a connection diagram of a vehicle testing system according to an embodiment of the present utility model.

[0026] like Figure 1 As shown, the vehicle test system of the present invention may include: a host computer 10 , a combination switch module 20 and a test bench 30 .

[0027] The host computer 10 includes a first USB port 11, which is used to generate switch control signals based on target test instructions and output them through the first USB port 11. The input of the combination switch module 20 is connected to the first USB port 11 and is used to generate analog and digital signals based on the switch control instructions. The switch control input port of the test bench 30 is connected to the output of the combination switch module 20 and is used to accommodate the vehicle system to be tested and test the vehicle components of the vehicle system to be tested based on the analog and digital signals.

[0028] Specifically, the vehicle system to be tested includes a vehicle domain controller (VDC) and multiple vehicle components connected to the VDC. These components may include a battery power supply, turn signals, interior lights, high and low beam headlights, door handles, wipers, rearview mirrors, and other electrical appliances. After the vehicle system to be tested is placed on the test bench 30, the entire vehicle wiring harness on the test bench 30 is sequentially connected to the battery power supply, turn signals, interior lights, high and low beam headlights, door handles, wipers, rearview mirrors, and other electrical appliances, as well as the VDC.

[0029] During the test process, the host computer 10 can store multiple test programs and determine the target test program based on the target test instructions, generate switch control signals, and send the switch control signals to the combination switch module 20 via the first USB port 11. The combination switch module 20 generates corresponding analog signals and digital signals based on the switch control signals. The test bench 30 receives the analog and digital signals and uses them to control the battery power supply, turn signals, interior lights, high and low beam headlights, door handles, wipers, rearview mirrors, and other electrical appliances to execute the corresponding test program. The analog and digital signals are both switch control signals corresponding to vehicle components. The connection selection of the corresponding switch port can be based on the control strategy settings of the vehicle components themselves. For example, analog signals can be used to control the brightness of the lights and the speed of the wipers, while digital signals can be used to control the power supply of the battery power supply, the opening or closing of the doors, the pressing of the Bluetooth key, etc.

[0030] This embodiment can realize physical switch control functions through the operation of the upper computer 10, such as turning on the high and low beam lights, position lights, wipers, ambient lights, interior lights, turn signals, unfolding and folding of rearview mirrors, PE buttons, remote control key buttons, four-door and two-cover switches, power switches, etc., thereby realizing automatic control of vehicle components. Compared with the manual switch control strategy adopted in related technologies, it greatly improves the test efficiency of the vehicle system and improves the test coverage. It can also realize the triggering of multiple switch actions in a short time, thereby facilitating the test bench 30 to test various vehicle components based on switch actions, which is suitable for scene test environments and expands the scope of application.

[0031] Combine Figure 2 As shown, in one embodiment of the present invention, the switch control input end of the test bench 30 includes an analog signal input end 31 and a first digital signal input end 32, and the combination switch module 20 includes: a control unit 21, an optocoupler isolation unit 22 and a conditioning circuit board 23, the input end of the control unit 21 is connected to the first USB port 11, the first output end of the control unit 21 is connected to the analog signal input end 31, the second output end of the control unit 21 is connected to the input end of the optocoupler isolation unit 22, the output end of the optocoupler isolation unit 22 is connected to the input end of the conditioning circuit board 23, and the first output end of the conditioning circuit board 23 is connected to the first digital signal input end 32.

[0032] Specifically, this embodiment utilizes a control unit 21, an optocoupler isolation unit 22, and a conditioning circuit board 23 to implement a combined switch, thereby establishing a physical switch chain for controlling vehicle components. This physical switch chain uses the MCU (control unit 21) to control the IO. The IO voltage level is converted by the optocoupler isolation unit 22 and the conditioning circuit board 23, and then converted to 12V / 0V high and low voltage levels, ultimately achieving physical on / off control of the vehicle components.

[0033] Combine Figure 2 and Figure 3 As shown, the specific connection is that the first USB port 11 of the host computer 10 is connected to the USB port of the control unit 21, the digital IO port of the control unit 21 is connected to the conditioning circuit board 1 / 2 / 3 through the optical coupling isolation unit 22, and the conditioning circuit board is then connected to the switch connector of the entire vehicle device through the digital signal input end of the test bench 30, and finally connected to the domain controller, and the analog IO port of the control unit 21 is connected to the analog switch (such as the interior light brightness switch) of the vehicle device through the analog signal input end of the test bench 30.

[0034] In one embodiment of the present invention, the switch control input end of the test bench 30 also includes a second digital signal input end 33, and the combination switch module 20 also includes: a relay 24, the relay 24 is connected in series between the second digital signal input end 33 and the first preset power supply end, and the control end of the relay 24 is connected to the second output end of the conditioning circuit board 23.

[0035] That is, in addition to directly controlling the on / off switching of vehicle components via the digital signal output by the conditioning circuit board 23, the on / off switching of vehicle components can also be controlled via the relay 24. For example, when the conditioning circuit board 23 outputs a high level, the relay 24 is turned on, and the corresponding digital input port of the test bench 30 receives the high level provided by the first preset power supply through the turned-on relay 24, thereby driving the corresponding vehicle component to turn on. When the conditioning circuit board 23 outputs a low level, the relay 24 is turned off, and the corresponding digital input port of the test bench 30 is at a low level, thereby driving the physical switch of the corresponding vehicle component to turn off. It is understood that the number of relays 24 can be one or more, and the specific setting can be determined based on actual testing requirements.

[0036] This embodiment uses a control unit 21 , an optical coupling isolation unit 22 , a conditioning circuit board 23 , and a relay 24 to implement a combined switch, so as to construct a physical switch link for switching control of vehicle components.

[0037] Combine Figure 4As shown, in one embodiment of the present invention, the optocoupler isolation unit 22 includes at least one optocoupler isolation circuit 221, and the second output end of the control unit 21 includes a first IO port IO1 and a second IO port IO2 corresponding to each optocoupler isolation circuit 221, and one of the first IO port IO1 and the second IO port IO2 is grounded. The optocoupler isolation circuit 221 includes: a photocoupler OC, a first input end 1 of the photocoupler OC is connected to the first IO port IO1, a second input end 2 of the photocoupler OC is connected to the second IO port IO2, a first output end 3 of the photocoupler OC is connected to the second preset power supply VCC2, and a second output end 4 of the photocoupler OC is connected to the input end of the conditioning circuit board 23.

[0038] In other words, an optocoupler (OC) primarily consists of a light source (such as a light-emitting diode (LED)) and a light receiver (such as a photodiode or phototransistor), enclosed in a sealed housing and coupled to each other via light. The optocoupler (OC) achieves electrical isolation, effectively preventing external interference and noise from affecting the circuit, improving system stability and reliability.

[0039] Taking the second IO port IO2 being grounded as an example, when the control unit 21 outputs a high level through the first IO port IO1, the second output terminal 4 of the optocoupler OC is connected to the first output terminal 3, and the optocoupler isolation circuit 221 outputs a high level; when the control unit 21 outputs a low level through the first IO port IO1, the second output terminal 4 of the optocoupler OC is disconnected from the first output terminal 3, and no high level is output.

[0040] In one embodiment of the present invention, the optocoupler isolation circuit 221 further includes a first resistor R1 connected in series between the first IO port and the first input terminal of the optocoupler OC, so that the first resistor R1 serves as a current limiting resistor to improve operational safety.

[0041] In one embodiment of the present invention, the optocoupler isolation circuit 221 further includes: a second resistor R2, one end of which is connected to the first IO port; and a light-emitting diode D1, an anode of which is connected to the other end of the second resistor R2, and the other end of which is connected to the second IO port. This improves the impedance matching, voltage stability, and anti-interference capability of the circuit.

[0042] In one embodiment of the present invention, the conditioning circuit board 23 includes multiple conditioning circuits 231, and the conditioning circuit 231 includes: a third resistor R3, one end of the third resistor R3 is connected to the second output end 4 of the optocoupler OC, and has a first node A, and the other end of the third resistor R3 is grounded, wherein the first node A serves as the output end of the conditioning circuit 231.

[0043] Specifically, let's take a light-emitting diode (LED) D2 and a resistor (R4) as examples of vehicle components installed on a test bench 30. When the second output terminal 4 of the optocoupler OC outputs a high level, the first node A of the conditioning circuit 231 is at a high level, and the LED D2 is illuminated. When the second output terminal 4 of the optocoupler OC does not output a high level, the first node A of the conditioning circuit 231 is at a low level, and the LED D2 is not illuminated.

[0044] In one embodiment of the present utility model, the vehicle testing system also includes a CANOE module 40, and the host computer 10 also includes a second USB port 12, the second USB port 12 is connected to the first port of the CANOE module 40, the second port of the CANOE module 40 is connected to the first bus communication terminal 34 of the test bench 30 via the CAN bus, and the third port of the CANOE module 40 is connected to the second bus communication terminal 35 of the test bench 30 via the LIN bus.

[0045] Specifically, the CANoe module 40 is used to simulate the entire automobile network system, including all electronic control units (ECUs) and bus communications. By simulating the transmission of various bus signals and data, it helps to test and verify the functions of the automobile electronic control system. During operation, the host computer 10 controls the CANoe module 40 to simulate the opponent information to implement the corresponding control function test of the vehicle domain controller. Specifically, the host computer 10 connects the CANoe module 40 through the second USB port 12, and then connects the CAN and LIN channels of the CANoe module 40 to the corresponding CAN and LIN channels of the domain controller for the opponent communication through the bus communication end of the test bench 30.

[0046] In one embodiment of the present invention, the host computer 10 further includes an Ethernet port 13 , and the system further includes a switch 50 , a first end of the switch 50 is connected to the Ethernet port 13 , and a second end of the switch 50 is connected to the Ethernet communication end 36 of the test bench 30 .

[0047] In other words, Ethernet communication and functions of the vehicle domain controller are controlled through the Ethernet port 13 of the host computer 10. Specifically, the Ethernet port 13 of the host computer 10 is connected to the switch 50, and the switch 50 is directly connected to the Ethernet interface of the vehicle domain controller through the Ethernet communication terminal 36 of the test bench 30 via an ETH link.

[0048] In one embodiment of the present invention, the third terminal of the switch 50 is connected to the external control system 100 to achieve communication with the external control system 100, facilitate remote test control and test data acquisition, and can be expanded to remote unattended bench testing.

[0049] Furthermore, the three types of system signals are integrated in the software of the host computer 10. Figure 5 ), realizing a unified abstract API to control different types of signals. Various signal controls are passed to the corresponding module drivers of the BSW layer through API functions (such as setSignal(value, type)) released to testers: Ethernet signals are driven by the ETH interface of the BSW layer, CAN / LIN BUS signals are driven by the BUS interface of BSW, and physical button signals are driven by the IO interface of BSW. Finally, the signals are sent to the execution end of the body domain controller of the corresponding vehicle test bench through their respective hardware channels. Among them, the system logic block diagram of the vehicle test system is shown as follows: Figure 6 shown.

[0050] As a specific embodiment of the present application, the vehicle test system Figure 2 As shown, this system can realize automated testing of the vehicle body domain controller and its accessory electrical systems. Through signal classification, the vehicle system has Ethernet message signals, CAN / LIN bus message signals, and physical switch signals. The vehicle test system classifies and controls these three signals.

[0051] Specifically, through the host computer's first US port 11 and the combination switch module 20, physical switch control functions can be implemented: turning on and off the high and low beam headlights, position lights, wipers, ambient lighting, interior lights, turn signals, mirror expansion and folding, PE button, remote key button, four-door and two-lid switches, and the power switch. Ethernet communication and functions of the vehicle domain controller are controlled through the host computer's Ethernet port 13. The host computer's second USB port 12 controls the CANOE module 40 to simulate partner information and test the corresponding control functions of the vehicle domain controller. Finally, the host computer 10 integrates these three signals, enabling automated testing in a real-world environment.

[0052] Compared to manual vehicle component testing methods in related technologies, this embodiment enables automated control testing, significantly improving test efficiency while also enabling test process recording and log traceability. Furthermore, the system's hardware cost is low, enabling scalable deployment. Adding a switch also allows for remote, unattended bench testing.

[0053] In summary, according to the vehicle testing system of the present invention, the host computer includes a first USB port, the input end of the combination switch module is connected to the first USB port, and the switch control input port of the test bench is connected to the output end of the combination switch module. The host computer generates a switch control signal based on the target test instruction and outputs it through the first USB port. The combination switch module generates analog signals and digital signals based on the switch control instruction. The test bench is used to place the vehicle system to be tested and test the vehicle components of the vehicle system to be tested based on the analog signals and digital signals. Thus, the vehicle testing system generates analog signals and digital signals through the host computer and the combination switch module to achieve automated control of the vehicle components of the vehicle system to be tested. Compared with manual control in related technologies, this improves testing efficiency and enables automated testing of the vehicle testing system.

[0054] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0056] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0057] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A vehicle testing system, characterized in that: The system comprises: A host computer, the host computer comprising a first USB port, configured to generate a switch control signal based on a target test instruction and output the signal through the first USB port; a combination switch module, an input end of which is connected to the first USB port, and is configured to generate an analog signal and a digital signal based on the switch control instruction; A test bench, wherein a switch control input port of the test bench is connected to the output end of the combination switch module, is used to place the vehicle system to be tested and test the vehicle components of the vehicle system to be tested based on the analog signal and the digital signal.

2. The vehicle testing system according to claim 1, characterized in that: The switch control input terminal of the test bench includes an analog signal input terminal and a first digital signal input terminal, and the combination switch module includes: A control unit, an optocoupler isolation unit and a conditioning circuit board, wherein the input end of the control unit is connected to the first USB port, the first output end of the control unit is connected to the analog signal input end, the second output end of the control unit is connected to the input end of the optocoupler isolation unit, the output end of the optocoupler isolation is connected to the input end of the conditioning circuit board, and the first output end of the conditioning circuit board is connected to the first digital signal input end.

3. The vehicle testing system according to claim 2, characterized in that: The switch control input terminal of the test bench further includes a second digital signal input terminal, and the combination switch module further includes: A relay is connected in series between the second digital signal input terminal and the first preset power supply terminal, and a control terminal of the relay is connected to the second output terminal of the conditioning circuit board.

4. The vehicle testing system according to claim 2, characterized in that: The optocoupler isolation unit includes at least one optocoupler isolation circuit, the second output end of the control unit includes a first IO port and a second IO port corresponding to each optocoupler isolation circuit, one of the first IO port and the second IO port is grounded, and the optocoupler isolation circuit includes: A photocoupler, wherein a first input end of the photocoupler is connected to the first IO port, a second input end of the photocoupler is connected to the second IO port, a first output end of the photocoupler is connected to a second preset power supply, and a second output end of the photocoupler is connected to an input end of a conditioning circuit board.

5. The vehicle testing system according to claim 4, characterized in that: The optocoupler isolation circuit further includes: A first resistor is connected in series between the first IO port and the first input terminal of the photoelectric coupler.

6. The vehicle testing system according to claim 5, characterized in that: The optocoupler isolation circuit further includes: a second resistor, one end of the second resistor being connected to the first IO port; A light emitting diode, wherein an anode of the light emitting diode is connected to the other end of the second resistor, and the other end of the light emitting diode is connected to the second IO port.

7. The vehicle testing system according to claim 4, characterized in that: The conditioning circuit board includes a plurality of conditioning circuits, and the conditioning circuits include: A third resistor, one end of the third resistor is connected to the second output end of the photocoupler and has a first node, and the other end of the third resistor is grounded, wherein the first node serves as the output end of the conditioning circuit.

8. The vehicle testing system according to any one of claims 1 to 7, characterized in that: The system also includes a CANOE module, and the host computer also includes a second USB port, the second USB port is connected to the first port of the CANOE module, the second port of the CANOE module is connected to the first bus communication end of the test bench via a CAN bus, and the third port of the CANOE module is connected to the second bus communication end of the test bench via a LIN bus.

9. The vehicle testing system according to claim 7, characterized in that: The host computer further includes an Ethernet port, and the system further includes a switch, a first end of the switch is connected to the Ethernet port, and a second end of the switch is connected to the Ethernet communication end of the test bench.

10. The vehicle testing system according to claim 9, characterized in that: The third terminal of the switch is connected to an external control system.

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