A vehicle rear-end collision warning system and method for visible light communication-based

The present invention discloses a kind of rear-end collision warning system based on the visible light communication, comprising a positioning module, MCU, modulating an optical communication module, LED lights, and HMI systems photosensitive receiver; the positioning module, modulating the optical communication module, and a photosensitive receiver HMI system are connected to the MCU, the LED lamp is connected to the optical communication module modulation. The present invention also discloses a method of warning a rear-end car kinds of communications based on visible light, in the vehicle front and rear are mounted on the vehicle near the rear-end collision warning system based on the visible light communication, rear approaching vehicle using active mode to transmit information to the front of the vehicle, so that the vehicle front rear approaching vehicle to obtain more status information to ensure the accuracy of the forward vehicle rear-end collision warning; Further, the vehicle rear-end collision warning ahead to select an appropriate threshold value TTC rear approaching vehicle model, make a more accurate determination.