A bus fault injection device

Abstract

The invention discloses a bus fault injection device. The bus fault injection device comprises a first interface, an electrical testing module, a physical layer fault module, a second interface and acontroller which is connected with the electrical testing module, and the first interface, the electrical testing module, the physical layer fault module and the second interface are connected in sequence. The controller is used for receiving a fault injection configuration instruction which comprises at least one piece of physical layer fault item injection information, electrical layer fault item injection information and protocol layer fault item injection information; the controller is further used for configuring a corresponding module into a fault injection state according to the included fault item injection information; when the electrical testing module is in the fault injection state, the received bus data is sent to the controller, and the controller injects a corresponding electrical layer fault item and / or a protocol layer fault item into the bus data; when the physical layer fault module is in the fault injection state, a physical layer fault item is injected into the busdata. In this way, it is achieved that multiple fault items are flexibly injected.

Description

technical field [0001] The invention relates to the technical field of bus signal fault diagnosis and injection, and more specifically relates to a bus fault injection device. Background technique [0002] In modern rail transit electronic systems, in order to fully detect the reliability of the system, it is often necessary to simulate various abnormal situations through fault injection technology, so as to test the system's ability to handle abnormal situations. [0003] Currently, in the fault injection method for the WTB (Wire Train Bus, twisted train bus) bus, the fault injection device is connected in series in the bus and simulates its corresponding fault item. Among them, one fault injection device can only simulate one fault item , For example, the relay board can only simulate the open circuit fault item, and the analog quantity board can only simulate the voltage amplitude fault item. It can be seen that a single stimulus injection device cannot flexibly simulate...

AI Technical Summary

Problems solved by technology

It can be seen that a single stimulus injection device cannot flexibly simulate multiple fault items

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