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Loopback test device and method for diagnosing vehicle central gateway communication link fault

A central gateway, loopback testing technology, applied in electrical testing/monitoring, testing/monitoring control systems, general control systems, etc., can solve problems such as low efficiency, high cost, short-circuit pins, etc., to save labor costs, Improve work efficiency, convenient and fast effect

Inactive Publication Date: 2021-01-19
BEIJING NEW ENERGY VEHICLE TECH INNOVATION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of software and hardware development, we often encounter the problem of communication link failure. Sometimes the positioning problem is caused by a BUG in the software code that leads to the failure of the link, and sometimes there is a problem with the hardware itself, such as pin short circuit, open circuit, device burnout, etc.
In most cases, software engineers write corresponding drivers and work with hardware engineers to find and locate problems, which is not efficient
In other cases, it is expensive to design and develop corresponding external test equipment to build a central gateway test system to locate faults.

Method used

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  • Loopback test device and method for diagnosing vehicle central gateway communication link fault
  • Loopback test device and method for diagnosing vehicle central gateway communication link fault

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A loopback testing device comprising

[0057] A power module, used for power supply of the device;

[0058] The Ethernet module is used to realize the data communication link of multiple vehicle-mounted Ethernet ports through the serial cascading mode of the vehicle-mounted Ethernet port of the vehicle central gateway controller;

[0059] The CAN bus module is used to carry all CAN bus communication ports of the vehicle central gateway controller on a CAN bus, and a matching resistor is installed on the CAN bus; and

[0060] The LIN bus module is used to carry all the LIN bus communication ports of the vehicle central gateway controller on a LIN bus, and use the LIN bus as a master node, and other LIN communication ports as slave nodes to communicate with the master node. The LIN bus There is a pull-up resistor connected to the master node.

[0061] The CAN bus module is provided with physical interfaces corresponding to all CAN bus communication ports of the vehicle ...

Embodiment 2

[0065] A method for diagnosing a fault in a vehicle central gateway communication link, comprising a host computer and the loopback testing device described in Embodiment 1;

[0066] The upper computer has a USB port, the vehicle central gateway has a UART port and a gateway connector male head, the physical interface of the CAN bus module of the loopback test device, the physical interface of the LIN bus module and the physical interface of the Ethernet module. The physical interface is integrated into the gateway connector female head paired with the gateway connector male head; the power module of the loopback test device is connected with a power plug and a 220V / 12V power adapter;

[0067] The upper computer communicates with the vehicle central gateway through the serial port;

[0068] The vehicle-mounted Ethernet port forms a multi-channel vehicle-mounted Ethernet data communication link through an Ethernet module;

[0069] All CAN bus communication ports of the vehicle...

Embodiment 3

[0088] A method for diagnosing a fault in a vehicle central gateway communication link, comprising

[0089] The upper computer communicates with the vehicle central gateway controller through the serial port (UART port), and the upper computer is used to send commands and receive the feedback results from the vehicle central gateway controller.

[0090] The upper computer is used to send commands to the vehicle central gateway to display the test feedback results of the vehicle central gateway.

[0091] The upper computer program realizes the communication with the vehicle central gateway through the debugging serial port, and realizes the corresponding instruction set program.

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Abstract

The invention relates to the technical field of vehicle fault analysis, in particular to a loopback test device and a method for diagnosing a vehicle central gateway communication link fault. An uppercomputer is in communication connection with a vehicle central gateway through a serial port, all Ethernet ports of the vehicle central gateway controller form data communication links of multiple vehicle-mounted Ethernet, all CAN bus communication ports are carried on one CAN bus, and all LIN buses are carried on one LIN bus; the storage space in the vehicle central gateway controller is provided with a test program for realizing the function of detecting the communication port; the loopback testing device is not provided with a processor, corresponding testing programs do not need to be written, and pure hardware implementation is achieved; diagnosis of a communication link of the vehicle central gateway controller is achieved through the program processing capacity of the vehicle central gateway controller. Under the condition that gateway software function development is not completed, whether a hardware communication link is good or not is rapidly diagnosed and positioned, and problem responsibility is defined.

Description

technical field [0001] The invention relates to the technical field of vehicle failure analysis, in particular to a loopback test device and a method for diagnosing a communication link failure of a vehicle central gateway. Background technique [0002] During the development process of the vehicle central gateway, various problems are often encountered, especially the problem of different communication links. In the process of software and hardware development, we often encounter the problem of communication link failure. Sometimes the positioning problem is caused by a BUG in the software code that leads to the failure of the link, and sometimes it is a problem in the hardware itself, such as pin short circuit, open circuit, device burnout, etc. In most cases, software engineers write corresponding drivers and work with hardware engineers to find and locate problems, which is not efficient. In other cases, it is expensive to design and develop corresponding external test ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
CPCG05B23/0213
Inventor 贾文伟原诚寅
Owner BEIJING NEW ENERGY VEHICLE TECH INNOVATION CENT CO LTD
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