Patent ID: 7275431

Claim:
A vehicle-mounted system for detecting an object, comprising: a first sensor and a second sensor positioned at one longitudinal end of a vehicle, the first sensor and the second sensor being in essentially a single plane; and a third sensor positioned at the one longitudinal end of the vehicle, the third sensor having a sensing angle that is smaller than sensing angles of the first sensor and the second sensor; wherein a detected object is determined as being relevant if the detected object is detected by at least the first sensor, the second sensor and the third sensor, wherein a sensing range of the first sensor and the second sensor are substantially coincident, wherein the sensing angles of the first sensor and the second sensor are between +/−50 degrees and +/−60 degrees, wherein the sensing angle of the third sensor is changeable so as to be adapted to the width of a road lane, and wherein the sensing angle of the third sensor is changeable by a control signal derived from sensing signals of the first, second and third sensors.