智能运输系统中的雷达车辆检测器

研究智能运输系统中的雷达车辆检测器，利用雷达原理完成对速度，流量等交通流的实时检测和统计，连续波雷达检测器利用运动目标产生的多普勒频移检测运动车辆，调频畦达检测器利用雷达测距原理检测静止,车辆，在频域中数字信号处理器对信号变换与处理，能快速，准确地得到车辆的速度，流量等信息，该检测器已广泛有于北京市智能运输系统中，实践表明对运动车辆的速度和流量的检测准确率高达95％。

Radar Vehicle Detector in Intelligent Traffic System

The vehicle detector in intelligent traffic system is studied and developed by using radar principle to finish the real time collection of traffic flow parameters such as vehicle velocity, flow rate. The Doppler frequency of moving target can be used to detect the moving vehicle, and the range measuring principle of FM radar can be used to detect the still vehicle. The digital signal processor transforms and processes the signal in frequency domain, and gains the vehicle velocity and flow rate rapidly and accurately. The vehicle detectors have been applied in the Beijing intelligent traffic system, the detecting precision of velocity and flow rate is up to 95%.