Patent ID: 9651386
Date: 2017-05-16
CPC Classifications: G01C,G08G

Claim:
1. An apparatus for calculating a distance between vehicles, the apparatus comprising: a processor; and a sensor, wherein the processor is configured to receive position movement information of a subject vehicle and position movement information of an object vehicle from a global positioning system and to calculate, using values sensed by the sensor, a distance between the moved subject vehicle and the moved object vehicle based on a position movement distance of the subject vehicle and a position movement distance of the object vehicle at a predetermined time as the sum of a vector when calculating the position movement information of the subject vehicle and the position movement information of the object vehicle over time using a dead reckoning formula comprising a yaw rate value at a previous time, a yaw rate value at a present time, a yaw rate value at a time at which the vehicles have been moved, position coordinate values at a previous time, position coordinate values at a time at which the vehicles have been moved, a position movement distance of the subject vehicle, a distance between the subject vehicle and the object vehicle at a previous time, a position movement distance of the object vehicle, and a distance between the moved subject vehicle and the moved object vehicle.