The invention provides a forward anti-collision early-warning method based on an ultrasonic sensor, comprising the following steps of S1 measuring a distance D between a current vehicle and a preceding vehicle through the ultrasonic sensor; S2 reading a speed and an acceleration of the current vehicle from a CAN (Controller Area Network) line; S3 calculating a safety distance according to a safety distance formula, wherein the safety distance formula is Dw=V<2>/2(a-f)+V*(T+s); Dbr=V<2>/2(a-f)+V*Ts; Dw is a warning distance; Dbr is an automatic braking distance; V is the speed of the current vehicle; a is the acceleration of the current vehicle; f is an acceleration correction value; T is a braking time; Ts is an automatic braking response time; s is a braking time correction value; as further improvement, S4 judging according to the safety distance formula calculated in the step S3 and performing corresponding actions. The forward anti-collision early-warning method based on the ultrasonic sensor has the beneficial effects that a vehicle driver is warned according to different early-warning levels or an action is applied on the vehicle, so that an anti-collision effect is achieved, rear-end collisions are effectively reduced, and traffic accidents are reduced.
Forward anti-collision early-warning method based on ultrasonic sensor
2015-06-03
Patent
Electronic Resource
English
IPC: | B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / G01S RADIO DIRECTION-FINDING , Funkpeilung |
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