SYSTEM ZUM FESTSTELLEN SICH BEWEGENDER HINDERNISSE FUER EIN FAHRZEUG

摘要

A moving obstacle detection system for an automotive vehicle utilizing a doppler effect of the transmitted wave against an obstacle which runs in front of the vehicle such as another vehicle. The system generally comprises: (a) a doppler radar unit which operates so as to produce a doppler signal when the vehicle is halted; (b) a detecting means which detects the changing phase of a doppler signal produced from the doppler signal; (c) a discriminating means which discriminates the departure of another vehicle from the front area of the vehicle and the intersection of another vehicle or pedestrian traverse to the vehicle on a basis of the frequency changing rate or amplitude level changing rate of the detected doppler signal; and (d) an alarm unit which produces an alarm in a predetermined form only when the departure of another vehicle from the front detection area of the doppler radar unit or in the case when another vehicle straightly approaches or departed from the vehicle and in the case when another vehicle or pedestrian goes across the vehicle, separately from each other.