A vehicle-mounted active warning method, system and device based on millimeter-wave radar

Abstract

The invention discloses a vehicle active forewarning method, system and device based on millimeter wave radar. The forewarning method comprises following steps: obtaining vehicle driving information from each sensor; determining whether two vehicles are in a same lane based on the relative angle and relative distance between a vehicle and an objective vehicle; determining the longitudinal safe braking distance if the two vehicles are in a same lane, wherein Sw represents a warning safe distance, Sbr represents a safe braking distance, and R represents the relative distance; if R>Sw, the vehicle is in a safe driving state; if Sw>=R>Sbr, the vehicle is faced with a potential risk of collision; and if R<=Sbr, the vehicle is in an extremely dangerous state. By use of the forewarning method, system and device, the safety state of a vehicle is pre-estimated and early warning is made; accident rate is effectively reduced; the signal processing time is in milliseconds; the device is easy to install and maintain; good using effect is achieved.

Description

technical field [0001] The invention relates to the technical field of vehicle active safety, in particular to a method, system and device for vehicle active early warning based on millimeter wave radar. Background technique [0002] Cars have gradually become a way of life for the masses, which greatly shortens the time for people's daily travel and material transportation, and promotes economic growth and social progress. However, the traffic safety problems that follow also seriously threaten people's lives and Property security and traffic safety issues are a common social problem and a worldwide problem. [0003] The occurrence of traffic accidents has great randomness and is restricted by many factors in the driving environment. An important factor is the driver's characteristics, such as driving experience, driving state and driving style; the other factor is the driving environment, such as in Driving in rainy and snowy weather or muddy roads is very prone to traffi...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a vehicle-mounted millimeter-wave radar-based vehicle with a signal processing time of millimeter level and a real-time and efficient judgment of vehicle safety status in view of the defect that the passive safety technology in the prior art cannot reduce the accident rate. Active warning method, system and device

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