Active anti-collision early-warning system and method for opening of side doors of car

The invention provides an active anti-collision early-warning system and method for opening of side doors of a car. The early-warning system comprises a car-door opening signal acquisition module, ultrasonic detection modules, a central data processing module and early-warning modules, wherein the car-door opening signal acquisition module is used for detecting a car-door opening signal to be taken as a starting signal of the whole system; the ultrasonic detection modules are used for detecting the external environment; the central data processing module is used for processing data detected by the ultrasonic detection module and judging whether the early-warning modules are started; two early-warning modules are arranged and are used for early warning of external light and early warning of internal sound and light. The active anti-collision early-warning system and method provided by the invention have the advantages that due to the double ultrasonic detection modules, the coverage area is wider; early warning of the external light and early warning of the internal sound and light are respectively used for external cars, pedestrians and internal passengers, so that the timeliness is stronger, the active anti-collision benefit is better, the safety performance is further improved, the early-warning accuracy is stronger and the cost is lower.