Vehicle obstruction detection system.

摘要

The radar system comprises in combination: a device for transmitting a pair of FM-CW radar signals, a device for transmitting a CW radar signal, a device for receiving the transmitted FM-CW and CW radar signals reflected from the target. The radar system also incorporates a device for determining a first apparent relative velocity of the target from the received FM-CW radar signals, a device for determining a second apparent relative velocity of the target from the received CW radar signal, and a device for comparing the first and second apparent relative velocities in magnitude to thereby determine from the difference therebetween whether the target is a hazard.