基于线性阵列包络线偏移叠加的车辆检测方法

基于声信号和震动信号的车辆目标探测,广泛应用于战场侦查、安防和反恐等领域。提出了一种基于声信号和震动传感器线性阵列包络线偏移叠加的车辆目标检测方法。该方法根据信号包络线特征和相似性,通过偏移叠加的方法进行信号检测和速度估计,不仅能提高对运动车辆目标的检测效率,还可给出它们的运动方向和速度。实验数据分析表明:除了多个车辆同时经过会导致目标信号在时域内重叠外,其他情况下车辆目标都能检测识别;与利用单个传感器的信噪比和持续时间等特征进行检测的结果相比,误检率由61%降至0%,而漏检率由7.8%升至12.5%.

A Vehicle Detection Method with Envelop Delay-and-sum Based on Linear Sensor Array

Detecting the vehicles via acoustic and vibration signals has been widely used in battlefield surveillance, security, and anti-terrorism. A new method based on the features and similarity of signal envelops is proposed and applied in vehicle detection. The envelop delay-and-sum is used not only to improve the detection efficiency of moving vehicle, but also provides the direction and speed of its movement. The analysis of experimental data shows that all vehicles could be detected except for several vehicles passing through at the same time. Compared with the detected results from a single sensor in signal-noise-ratio and signal duration, the false alarm rate is decreased from 61% to 0%，while the missed detection rate is increased from 7.8% to 12.5%.