VEHICLE COLLISION ANTICIPATING DEVICE

摘要

An improvement of a vehicle collision anticipating device using transmitted and reflected frequency modulated continuous waves is provided. A low frequency wave is produced by mixing a part of a transmitted wave and a reflected wave from an object. The low frequency wave and at least one Doppler signal obtained from the low frequency wave are signal processed so as to generate signals. A distance between the vehicle and object is detected. An intensity of said Doppler signal is detected. A collision of the object against the vehicle is anticipated by detecting the object entering a predetermined distance range in front of the vehicle and a predetermined minimum intensity range determined by the positions and angles of the transmitting and receiving antennas.