Electric vehicle airbag control method based on three CAN buses

Abstract

The invention discloses an electric vehicle airbag control method based on three CAN buses. A collision sensor sends vehicle collision information to a vehicle controller through a first CAN bus, andthe vehicle controller verifies the vehicle collision information to determine whether airbag opening conditions are met or not; if the verification is passed, the vehicle controller sends airbag opening request information to an airbag controller through a second signal conversion module via the first CAN bus, and sends the airbag opening request information to the airbag controller through a first signal conversion module via the second CAN bus; the airbag controller verifies the received airbag opening request information jointly, and controls an airbag to open if the joint verification ispassed.

Description

technical field [0001] The invention relates to a control method, in particular to an electric vehicle airbag control method based on a three-way CAN bus. Background technique [0002] In existing electric vehicles, the control of the airbag is performed by judging vehicle collision information, vehicle acceleration information, and vehicle speed information. The vehicle collision information, vehicle acceleration information, and vehicle speed information transmitted by the CAN bus are compared with the vehicle collision information, vehicle acceleration information, and vehicle speed information when the airbag is turned on. If the vehicle collision information, vehicle acceleration information, and vehicle speed If the information is higher than the vehicle collision information, vehicle acceleration information, and vehicle speed information when the airbag is activated, it is considered that the condition of the airbag activation is met, and the airbag controller can be...

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Problems solved by technology

[0003] However, the above judgment results are based on the normal operation of the CAN bus carrying vehicle collision information, vehicle acceleration information, and vehicle speed information. If the CAN bus fails, it will cause vehicle collision information, and / or vehicle Acceleration information and / or vehicle speed information is lost, and after the signal is lost, the airbag cannot be activated in time when the vehicle collides, which may easily cause injuries to drivers and passengers, and even endanger life safety

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