Development and test experimental device for vehicle-mounted wireless communication system

Abstract

The utility model relates to a kind of vehicle-mounted wireless communication system development and test experimental device, including experiment box;Experiment box is configured with operation panel, and operation panel is configured with several automobile function domain control module, each automobile function domain control module is respectively accessed CAN bus by the CAN transceiver built-in in each self;Operation panel is also configured with T-box module, and T-box module is connected with host computer by the wireless transmission module of external connection, and accessed CAN bus by the CAN transceiver built-in in it;T-box module also includes programmable development board, for developing debugging and testing to the CAN transceiver and wireless transmission module built-in in T-box module. The above scheme provides including Bluetooth, WIFI and 4G / 5G and multiple vehicle-mounted wireless communication functions, can carry out vehicle-mounted wireless communication system development and test experiment.

Description

Technical Field

[0001] This utility model relates to an experimental device for the development and testing of vehicle-mounted wireless communication systems, and in particular to an experimental device for the development and testing of vehicle-mounted wireless communication systems. Background Technology

[0002] With the intelligent development of the automotive industry, intelligent vehicles are gradually becoming integrated systems encompassing environmental perception, planning and decision-making, and multi-level assisted driving. They utilize technologies such as computers, modern sensing, information fusion, communication, artificial intelligence, and automatic control, making them typical high-tech complexes. The operation of intelligent vehicles is inseparable from their wireless communication systems, which place higher reliability requirements on the entire vehicle's wireless communication system compared to traditional vehicles. Therefore, testing the wireless communication of intelligent vehicles is a crucial step in ensuring their safety, performance, compliance, and user experience.

[0003] However, most existing automotive tests include durability testing, NVN testing, environmental simulation testing, efficiency testing, functional testing, and component torsion testing, lacking a solution for independently testing in-vehicle wireless communication systems. Utility Model Content

[0004] Therefore, it is necessary to provide an experimental device for the development and testing of vehicle-mounted wireless communication systems to address the above-mentioned problems.

[0005] An experimental setup for the development and testing of a vehicle-mounted wireless communication system, comprising:

[0006] Experimental box;

[0007] The experimental box is equipped with an operation panel, which contains several automotive functional domain control modules. Each automotive functional domain control module is connected to the CAN bus through its own built-in CAN transceiver.

[0008] The operation panel is also equipped with a T-box module, which connects to the host computer via an external wireless transmission module and accesses the CAN bus via a built-in CAN transceiver. The T-box module also includes a programmable development board for developing, debugging, and testing the built-in CAN transceiver and wireless transmission module.

[0009] In one embodiment, the vehicle functional domain control module includes an engine module, a wheel speed module, a body module, and an instrument gateway module.

[0010] In one embodiment, the T-box module connects to the instrument gateway module via its built-in CAN transceiver and uses the instrument gateway module to access the CAN bus.

[0011] In one embodiment, the various vehicle functional domain control modules are connected via a high-speed CAN bus, while the T-box module and the instrument gateway module are connected via a low-speed CAN bus.

[0012] In one embodiment, the wireless transmission module includes a Bluetooth module, a WIFI module, and a 4G / 5G module.

[0013] In one embodiment, the operation panel is also equipped with an RF module and an NFC module. The RF module and the NFC module are connected to the CAN bus through their respective built-in CAN transceivers to connect to the various automotive functional domain control modules.

[0014] In one embodiment, each of the vehicle functional domain control modules, RF modules, NFC modules, and T-box modules is provided with a measurement hole for electrical signal measurement.

[0015] In one embodiment, the engine module includes a resolver and is connected to the wheel motor controller via a PWM interface;

[0016] The wheel speed module includes a Hall sensor;

[0017] The body module is connected to the window motor controller via a PWM interface, and to the headlight controller and lock controller via a GPIO interface.

[0018] The instrument gateway module is connected to the LCD screen via the EXMC interface.

[0019] In one embodiment, the CAN bus is an external connection line.

[0020] This application constructs a basic vehicle-mounted wireless communication system platform experimental box, including the experimental box itself. The box contains an operation panel with several automotive functional domain control modules, each connected to the CAN bus via its built-in CAN transceiver. The operation panel also includes a T-box module, which connects to a host computer via an external wireless transmission module and is connected to the CAN bus via its built-in CAN transceiver. The T-box module also includes a programmable development board for developing, debugging, and testing the built-in CAN transceiver and wireless transmission module. This solution provides various vehicle-mounted wireless communication functions, including Bluetooth, Wi-Fi, and 4G / 5G, enabling the development and testing of vehicle-mounted wireless communication systems. Attached Figure Description

[0021] Figure 1 Logical architecture diagram of experimental setup for developing and testing vehicle-mounted wireless communication systems;

[0022] Figure 2A schematic diagram of the physical structure of the experimental device for developing and testing vehicle-mounted wireless communication systems. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0024] See Figure 1 Figure 1 shows a logical architecture diagram of an experimental device for the development and testing of an in-vehicle wireless communication system according to an embodiment of this application. The experimental device includes an experimental box; an operation panel is configured inside the box, and several automotive functional domain control modules are configured on the operation panel. Each automotive functional domain control module is connected to the CAN bus through its built-in CAN transceiver; a T-box module is also configured on the operation panel, which is connected to a host computer through an external wireless transmission module and connected to the CAN bus through its built-in CAN transceiver; the T-box module also includes a programmable development board for developing, debugging, and testing the built-in CAN transceiver and wireless transmission module of the T-box module.

[0025] The test chamber is a box-like structure with a lid and a carrying handle. The plastic outer shell is lightweight and low-cost, suitable for testing in general environments; the metal outer shell offers high strength, good heat dissipation, and strong electromagnetic shielding, and is often used in applications requiring high stability and anti-interference capabilities. The outer shell must have good sealing properties to prevent dust, moisture, etc., from entering and affecting the internal components. Simultaneously, ventilation holes or heat dissipation grooves are designed to ensure that the heat generated by the internal components during operation is effectively dissipated.

[0026] The operation panel integrates various electronic components, such as microcontrollers (MCUs), integrated circuits (ICs), resistors, capacitors, LCD / LED displays, motors, LEDs, sensors, and microcontroller development boards. The operation panel is connected to other components in the experimental box, such as power supplies, sensors, and actuators, via signal connection cables.

[0027] Various automotive functional domain control modules divide a vehicle into several control modules based on its functions, including the engine module, wheel speed module, body module, and instrument gateway module. The engine module controls the vehicle's powertrain, including the throttle, motor, transformer, electric drive, reducer, and electric drive axle. The wheel speed module monitors wheel speeds and is an important reference for whether the engine module is accurately executing commands. The body module includes headlights, door locks, windows, trunk, and air conditioning. The instrument gateway module includes the display screen.

[0028] The T-box module, short for Telematics Box, also known as a Telematics Control Unit (TCU), is an intelligent terminal device composed of a processor, a GPS module, and various interfaces (such as CAN bus, Bluetooth, 4G, and WiFi). The T-box module connects to the vehicle's main unit via the CAN bus to transmit commands and information, thereby acquiring information such as vehicle status and button status, and transmitting control commands. It communicates indirectly with the host computer via a data link through a backend system. Taking unlocking a car door as an example, the control command passes through a series of stages: the host computer, the wireless communication module, the T-box module, the CAN bus, and the door controller.

[0029] In one embodiment, the wireless transmission module includes a Bluetooth module, a WIFI module, and a 4G / 5G module, and is connected to the T-box module through an interface on the T-box module.

[0030] The T-box module also includes a programmable development board, which can be based on the STM32F103 platform to conduct program development and testing experiments for wireless communication functions such as Bluetooth, WIFI, 4G / 5G and wired communication functions such as CAN bus. Users can perform secondary development and debugging based on the above communication function demo programs.

[0031] In one embodiment, the T-box module connects to the instrument cluster gateway module via its built-in CAN transceiver and accesses the CAN bus through the instrument cluster gateway module. The various automotive functional domain control modules are connected via a high-speed CAN bus, while the T-box module and the instrument cluster gateway module are connected via a low-speed CAN bus. The high-speed CAN bus has a baud rate of 500 Kb / s, and the low-speed CAN bus has a baud rate of 125 Kb / s.

[0032] In addition, the operation panel is equipped with an RF module and an NFC module, which are connected to the CAN bus through their respective built-in CAN transceivers.

[0033] In one embodiment, the engine module includes a resolver and is connected to the wheel motor controller via a PWM interface; the wheel speed module includes a Hall sensor; the body module is connected to the window motor controller via a PWM interface and to the headlight controller and the vehicle lock controller via a GPIO interface; and the instrument gateway module is connected to the LCD screen via an EXMC interface.

[0034] In one embodiment, each automotive functional domain control module, RF module, NFC module, and T-box module is equipped with a measurement port for electrical signal measurement. All modules in the experimental box communicate via a CAN bus, which provides the underlying support for wireless communication experiments; therefore, analysis and debugging are necessary. A CAN analyzer can be connected to the measurement port to analyze the CAN bus data of the experimental box.

[0035] In one embodiment, the CAN bus is an external connection line, which facilitates CAN bus link fault configuration.

[0036] In one embodiment, the vehicle-mounted wireless communication system development and testing experimental device includes an RF module, an NFC module, an engine module, a wheel speed module, a body module, an instrument gateway module, a T-box module, and a host computer. The RF module, NFC module, engine module, wheel speed module, body module, and instrument gateway module are connected via a high-speed CAN bus, the instrument gateway module and the T-box module are connected via a low-speed CAN bus, and the T-box module and the host computer are connected via a wireless communication module.

[0037] The system comprises the following modules: RF module receives the radio frequency signal from the remote key, parses it, and sends out unlock / lock frames via the high-speed CAN bus; NFC module receives the radio frequency signal from the NFC card, parses it, and sends out unlock / lock frames via the high-speed CAN bus; engine module receives and parses the throttle knob signal, displays the throttle opening value, and sends out throttle position frames via the high-speed CAN bus; wheel speed module receives and parses wheel speed signals, displays the wheel speed value, and sends out wheel speed frames via the high-speed CAN bus; and body module receives high-speed CAN bus data frames, parses them, and sends out unlock / lock frames via the high-speed CAN bus. The system analyzes and controls the vehicle's locks, window motors, and lights; the instrument cluster gateway module transmits, receives, and parses high- and low-speed CAN bus data frames, displaying throttle opening values, vehicle speed values, light and window status, and fault information; the T-box module transmits, receives, and parses Bluetooth, Wi-Fi, 4G / 5G, and CAN bus data frames to achieve corresponding control functions; an app installed on the host computer transmits, receives, and parses Bluetooth, Wi-Fi, and 4G / 5G signals to remotely monitor locking / unlocking, window closing, light operation, throttle opening, and wheel speed.

[0038] The usage method of the experimental device for the development and testing of vehicle-mounted wireless communication systems is as follows:

[0039] (1) Connect the power interface on the experimental box to a 220V AC power supply and press the power switch;

[0040] (2) When the system is powered on, the T-box module enters the working mode, and the corresponding display of the NFC module will show the indicator that it has entered the working state;

[0041] (3) Bring the paired NFC card close to the NFC sensing area of ​​the control panel, or press the unlock button of the paired remote key, and the system will be unlocked, and the engine module, wheel speed module, body module and instrument module will enter the working state.

[0042] (4) After the system enters the working state, the following operations can be performed:

[0043] Adjusting the throttle sensor knob will display the corresponding throttle opening value on the engine module display screen, and the wheel motor will drive the wheel to rotate, and the wheel speed module will display the wheel speed on the corresponding display screen.

[0044] Bring the NFC card close to the NFC sensing area on the control panel, or press the lock button on the paired remote key, and the engine module, wheel speed module, body module, and instrument module will enter the shutdown state.

[0045] (5) Use the APP on the host computer to remotely control the experimental box to perform operations such as locking and unlocking, closing windows, turning lights on and off, and reading test data. Before running the host computer, you need to ensure that a communication connection is established with the wireless communication module.

[0046] The typical data acquisition process for analysis during testing is as follows:

[0047] For the RF module's lock / unlock experiment, pressing the lock / unlock button on the remote key sends an RF signal to the RF module. Upon receiving the RF signal, the RF module analyzes and verifies it. After successful verification, it immediately sends three consecutive RF lock / unlock frames on the high-speed CAN bus to ensure they can be received by other modules. Connecting a CAN analyzer to the high-speed CAN bus makes the RF lock / unlock frames visible. Upon receiving the RF lock / unlock frames, the body module executes the lock / unlock action.

[0048] A spectrum analyzer is used to capture and analyze the time-frequency characteristics of the remote control key's RF signal, such as frequency band, amplitude, and power.

[0049] For the NFC module's lock / unlock experiment, an NFC card is brought close to the NFC sensing area. The NFC module analyzes and verifies the NFC card signal. Upon successful verification, it immediately sends an NFC lock / unlock frame on the high-speed CAN bus. Connecting a CAN analyzer to the high-speed CAN bus makes the NFC lock / unlock frame visible. Upon receiving the NFC lock / unlock frame, the body module executes the lock / unlock action.

[0050] The NFC module hardware platform uses the HR01 series NFC module. This module communicates with the NFC module via a serial port, connecting the NFC module to a TTL serial port device for read and write operations. After opening the serial terminal software and configuring the serial port parameters, the NFC card is brought close to the NFC sensing area on the operation panel. Once the NFC module completes the data reading from the NFC card tag, it automatically transmits the data to the serial terminal software. The HR01 series NFC module supports reading and writing to the module registers, allowing configuration of tag data reporting modes, system parameters, and serial port settings. It should be noted that changing the serial port settings is not recommended for this experimental setup, as it may cause the NFC module to malfunction.

[0051] For the development and testing of WIFI remote control, a host computer APP sends WIFI signals to remotely control the locking / unlocking of the vehicle, closing of windows, and turning on / off of lights. The WIFI module of the T-box module receives and parses the remote control signal, and then sends the corresponding data frame to the instrument gateway module via the low-speed CAN bus. The instrument gateway module forwards the lock / unlock frame to the body module via the high-speed CAN bus, which then executes the corresponding action.

[0052] Configure the host computer's WIFI signal, select the WIFI module to connect to the T-box module, and send commands such as unlocking, locking, and closing windows from the host computer APP.

[0053] In addition, testing can be performed using a network debugging assistant. Configure the host computer's Wi-Fi signal, open the network debugging assistant, set the T-box module's Wi-Fi address and port, and use the network debugging assistant to send remote control commands to test the Wi-Fi communication function, including commands such as unlocking, locking, and closing windows. The T-box module's Wi-Fi module receives the remote control commands sent by the network debugging assistant, parses them, and then sends out the corresponding CAN data frames. Connecting a CAN bus analyzer to both the high-speed and low-speed CAN buses will show the CAN data frames corresponding to the remote control commands.

[0054] For the development and testing of Bluetooth remote control, a host computer APP sends Bluetooth signals to remotely lock / unlock, close windows, and turn lights on / off. The T-box's Bluetooth module receives and parses the remote control signals, then sends the corresponding data frames to the instrument cluster gateway module via a low-speed CAN bus. The instrument cluster gateway module forwards the lock / unlock frames to the body module via a high-speed CAN bus, which then executes the corresponding actions.

[0055] Enable the host computer's Bluetooth function, select the Bluetooth module to connect to the T-box module, and send commands such as unlocking, locking, and closing the windows from the host computer APP.

[0056] In addition, testing can be performed using a network debugging assistant. Open HC Bluetooth Assistant, select the Bluetooth signal source connected to the T-box module, and send a remote control command to test the Bluetooth communication function. The T-box module's Bluetooth receives the remote control command, parses it, and sends the corresponding CAN data frame. Using a CAN bus analyzer, the corresponding CAN data frame sent by the T-box module can be observed when connected to both high-speed and low-speed CAN buses.

[0057] For the development and testing of 4G functionality, the T-box module uploads throttle opening values, wheel speed values, and fault information to the cloud server platform via the 4G network. The cloud server platform sends unlock / lock, window closing, and headlight on / off commands to the T-box module via the 4G network. The T-box module parses these commands and sends the corresponding CAN data frames to the instrument cluster gateway module via the high-speed CAN bus. The instrument cluster gateway module then forwards these commands to relevant modules via the low-speed CAN bus to execute the corresponding control actions.

[0058] When the T-box module is working, it periodically reads throttle position values, wheel speed values, and fault information from the CAN bus and uploads them to the cloud server platform via the 4G module. In addition, when the T-box module is working, it receives remote control command data for the experimental box from the cloud server platform in real time, including locking / unlocking, closing windows, and turning lights on and off.

[0059] The vehicle-mounted wireless communication system development and testing experimental device disclosed in this application is suitable for teaching and research experiments in courses such as automotive wireless communication technology, automotive microcontrollers and CAN bus in automotive electronics technology, intelligent vehicle technology, vehicle engineering, and electronic information related majors.

[0060] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0061] It should be noted that when a component is described as "set on" or "configured with" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An experimental device for the development and testing of a vehicle-mounted wireless communication system, characterized in that, include: Experimental box; The experimental box is equipped with an operation panel, which is equipped with several automotive functional domain control modules. Each of the automotive functional domain control modules is connected to the CAN bus through its own built-in CAN transceiver. The operation panel is also equipped with a T-box module, which is connected to the host computer via an external wireless transmission module and accesses the CAN bus via a built-in CAN transceiver. The T-box module also includes a programmable development board for developing, debugging, and testing the built-in CAN transceiver and the wireless transmission module.

2. The experimental apparatus for the development and testing of a vehicle-mounted wireless communication system according to claim 1, characterized in that: The vehicle functional domain control module includes an engine module, a wheel speed module, a body module, and an instrument gateway module.

3. The experimental apparatus for the development and testing of a vehicle-mounted wireless communication system according to claim 2, characterized in that: The T-box module connects to the instrument gateway module via a built-in CAN transceiver and accesses the CAN bus through the instrument gateway module.

4. The experimental apparatus for the development and testing of a vehicle-mounted wireless communication system according to claim 3, characterized in that: The various automotive functional domain control modules are connected via a high-speed CAN bus, while the T-box module and the instrument gateway module are connected via a low-speed CAN bus.

5. The experimental apparatus for the development and testing of a vehicle-mounted wireless communication system according to claim 1, characterized in that: The wireless transmission module includes a Bluetooth module, a WIFI module, and a 4G / 5G module.

6. The experimental apparatus for the development and testing of a vehicle-mounted wireless communication system according to claim 1, characterized in that: The operation panel is also equipped with an RF module and an NFC module, which are connected to the CAN bus through their respective built-in CAN transceivers.

7. The experimental apparatus for the development and testing of a vehicle-mounted wireless communication system according to claim 6, characterized in that: Each of the aforementioned automotive functional domain control modules, the RF module, the NFC module, and the T-box module is provided with a measurement hole for measuring electrical signals.

8. The experimental apparatus for the development and testing of a vehicle-mounted wireless communication system according to claim 2, characterized in that: The engine module includes a resolver and is connected to the wheel motor controller via a PWM interface; The wheel speed module includes a Hall sensor; The body module is connected to the window motor controller via a PWM interface, and to the headlight controller and the lock controller via a GPIO interface. The instrument gateway module is connected to the LCD screen via the EXMC interface.

9. The experimental apparatus for the development and testing of a vehicle-mounted wireless communication system according to claim 1, characterized in that: The CAN bus is an external connection cable.

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