Preceding Vehicle Detection Using Stereo Images and Non-scanning Millimeter-Wave Radar

We developed a system that detects the vehicle driving immediately ahead of one's own car in the same lane and measures the distance to and relativ e speed of that v ehicle to prev ent accidents such as rear-end collisions.The system is the first in the industry to use non-scanning millimeter-wav e radar combined with a sturdy stereo image sensor, which k eeps cost low.I t can operate stably in adv erse weather conditions such as rain and snow, which could not easily be done with prev ious sensors.The system' s v ehicle detection performance was tested, and the system can correctly detect v ehicles driv ing 3 to 50 m ahead in the same lane with higher than 9 9% accuracy in clear weather.Detection performance in rainy weather, where water drops and splashes notably degraded v isibility, was higher than 90%.