Method and device for determining vehicle speed and vehicle

Abstract

The invention provides an automobile speed determining method and device, and an automobile, and relates to the technical field of automobile control. The automobile speed determining method comprisesthe steps that the rotational speed of a motor of the automobile and the rotational speeds of a plurality of wheels are obtained in real time; if the current obtained rotational speeds of the multiple wheels are all within a first preset range, the first theoretical automobile speed is calculated according to the rotational speeds of the multiple wheels; if the current obtained rotational speed of the motor is within a second preset range, the second theoretical automobile speed is calculated according to the rotational speed of the motor; and the current output automobile speed of the automobile is determined according to the first theoretical automobile speed and the second theoretical automobile speed. According to the automobile speed determining method and device, and the automobile,the calculated theoretical automobile speeds are subjected to security checking, the possibility of accident occurring caused by automobile speed miscalculation due to unit exception is decreased, and the safety and reliability of the automobile are improved.

Description

technical field [0001] The invention belongs to the technical field of vehicle control, and in particular relates to a vehicle speed determination method, device and vehicle. Background technique [0002] With the development of economy and technology, cars are becoming more and more popular, and cars have become an indispensable travel tool for people. With the increase in the number of cars, there are more and more traffic accidents on the road. It also happens from time to time. Therefore, users have higher and higher requirements for the safety and reliability of cars. [0003] In the prior art, the vehicle speed is determined by collecting the rotational speed of each wheel and the rotation radius of the wheels by the wheel speed sensors on the four wheels to determine the driving speed of the vehicle. At present, there is no specific safety check and fault handling process, so When the wheel speed sensor fails, the calculated vehicle speed does not match the actual ve...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the vehicle speed is determined by collecting the rotational speed of each wheel and the rotation radius of the wheels by the wheel speed sensors on the four wheels to determine the driving speed of the vehicle. At present, there is no specific safety check and fault handling process, so When the wheel speed sensor fails, the calculated vehicle speed does not match the actual vehicle speed, causing the car to lose control, threatening the safety of people and vehicles

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