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CAN bus work mode on-line simulation system

A technology of CAN bus and working mode, which is applied in the field of online simulation system and online simulation system of CAN bus working mode, which can solve the problems of difficult express location, low efficiency, affecting work efficiency, etc., and achieves fast simulation and testing, and simple process structure , low cost effect

Pending Publication Date: 2017-12-08
GUANGXI NORMAL UNIV
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  • Application Information

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Problems solved by technology

[0003] However, the realization of this test verification and troubleshooting today is mainly through manual or semi-automatic testing, and the testing process requires engineers to do a lot of repetitive work
Developers who are new to the CAN bus will spend more time, and it is even difficult to accurately determine the cause of some fault interference
Therefore, this type of method has problems such as low efficiency and difficult express location for fault recurrence, which seriously affects work efficiency

Method used

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  • CAN bus work mode on-line simulation system

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] Such as figure 1 As shown, a kind of online emulation system of CAN bus operating mode comprises the CAN transceiver simulation unit 1 for simulating the CAN transceiver to send and receive signals, and the CANH pin 113 and the CANL pin 114 of the CAN transceiver simulation unit 1 are set There is load circuit 2. The CAN transceiver simulation unit 1 includes a CAN sending module and a CAN receiving module, and the CAN sending module includes a high-speed buffer gate 102 sequentially arranged between the TXD pin 111 (send data pin) and the CANH pin 113 and the CANL pin 112 , an output stage control module 103 and a current-limiting output stage module with anti-reverse protection, the current-limiting output stage module with anti-reverse protection includes a high-side output stage 104 and a low-side output stage 105 .

[0029] The high-speed ...

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Abstract

The invention discloses a CAN bus work mode on-line simulation system, which comprises a CAN transceiver simulation unit for simulating a CAN transceiver to send and receive signals. A load circuit is arranged between a CANH pin and a CANL pin of the CAN transceiver simulation unit. A mode switching unit comprises a node mode switching circuit and a bus mode switching circuit. The node mode switching circuit is used for switching a CAN node to a short-circuit-to-power-supply failure mode or a short-circuit-to-ground failure mode. The bus mode switching circuit is used for switching the CAN node to a normal working mode / open circuit fault mode / short circuit fault mode. The simulation system can simulate the normal working mode and the fault disturbance mode of a CAN bus, can quickly reproduce and locate fault states and can realize cost decreasing and benefit increasing in the CAN bus development and use process.

Description

technical field [0001] The invention relates to the technical field of an online simulation system of a CAN bus working mode, in particular to an online simulation system of a CAN bus working mode in the automotive field. Background technique [0002] CAN (Controller Area Network) can complete the communication between various electronic control systems with different data types and reliability in the vehicle system, and can realize "reduction in the number of wiring harnesses" and "through multiple LANs (local area networks), high-speed transmission of large amounts of data communication” needs. Each electronic control system is connected through a pair of CAN buses. In order to ensure its performance and reliability, it is necessary to refer to international standards (such as ISO11898 standards, SAE standards, etc.) and OEM ( Enterprise) standard to test and verify its normal working mode and fault interference mode. [0003] Today, the test verification and troubleshoo...

Claims

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Application Information

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IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 秦运柏王龙林李宏伟朱勇建刘子源任静李俊毅李海滨谭挺艳仰容生
Owner GUANGXI NORMAL UNIV
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