Geomagnetic sensor-based car meeting early warning system for highway curves

The utility model discloses a geomagnetic sensor-based car meeting early warning system for highway curves. The early warning system consists of a geomagnetic sensor, a controller and a variable information sign; wherein the geomagnetic sensor is installed underground at the middle position of a driveway, the depth underground ensures that the geomagnetic sensor can respond to variable signals of a magnetic field of the earth when ferromagnetic objects pass, or is installed the position on the ground at the side of a vehicle; the magnetic field change signal acquisition terminal of the controller is connected with the magnetic field change signal output end of the geomagnetic sensor, the variable information sign is an electronic display device, the data input end of the variable information sign is connected with the data output end of the controller, the geomagnetic sensor is arranged at the upstream position in the forward direction or/and reversed direction of the driveway, and the variable information sign is arranged at the downstream position in the forward direction or/and reversed direction of the driveway. The geomagnetic sensor-based car meeting early warning system can realize the effect of releasing prompting early warning information to a driver about whether a vehicle is rolling by from the opposite, so as to ensure traffic safety.