Lane departure alarm system based on vehicle-mounted high-precision map

The invention discloses a lane departure alarm system based on a vehicle-mounted high-precision map, and the system comprises a vehicle-mounted terminal which comprises a housing, is installed in a vehicle, and is internally provided with a circuit board; a data processing chip, a data communication bus module, a data serial port communication module, a wireless data communication module, a road image acquisition module, a road image processing module and a driving circuit module are mounted on the circuit board; the sensor unit is assembled in the vehicle, and the driving circuit module is connected with the sensor unit through a connecting line; the image acquisition unit comprises a plurality of cameras, and all the cameras are connected with the road image acquisition module through connecting lines; a data processing chip; a route request unit; a judgment and prediction unit; and a vehicle-mounted high-precision map unit. The lane information and the vehicle information are collected, the lane is predict