Patent ID: 6281786
Filing Date: 2001-08-28
Classification: G01S,Y10S

Abstract:
An obstacle detection system for a vehicle comprising:a plurality of ultrasonic wave sensors each of which transmits an ultrasonic wave around the vehicle and receives a reflected ultrasonic wave for detecting a nearby obstacle around the vehicle;an electromagnetic wave sensor which transmits an electromagnetic wave in a forward direction of the vehicle and receives a reflected electromagnetic wave for detecting a remote obstacle at a distance remote from the vehicle;a vehicle speed sensor for sensing a speed of the vehicle and providing a speed output;a detection unit which detects a presence of the nearby obstacle based upon said reflected ultrasonic wave and a presence of the remote obstacle based upon said reflected electromagnetic wave when said speed output is not more than a predetermined reference speed and detects a position of the remote obstacle relative to the vehicle only based upon said reflected electromagnetic wave when said speed output exceeds the predetermined reference speed, said detection unit issuing a nearby signal when said nearby obstacle is detected and issuing a remote signal when the position of said remote obstacle is within a predetermined distance of the vehicle; anda warning unit which provide warnings in response to each of said nearby and remote signals.