摘要
为提高热释电红外传感器(PIR)系统目标定位的精准度,提出一种基于众数判定的无线传感器网络目标定位方法。首先,使用米字形感应模型特殊光锥设计的小型PIR传感器系统作为传感器节点组成无线PIR传感器网络,通过峰峰值时间差法和对探测区域划分编码的方式获取目标的距离和角度信息;其次,通过对测量点落入传感器探测区域概率的众数判定,筛选提取出目标有效位置信息,实现对运动目标的准确定位;最后,用极径序列生成目标运动轨迹。实验结果表明:该方法能够在有限目标信息条件下实现对目标的准确定位并有效提高定位精度,减小因传感器误报对定位精度造成的影响。
In order to improve the pyroelectric infrared sensor(PIR) system precision of target location,proposes a wireless sensor network target localization method based on mode judgment. Firstly, using the PIR sensor system with a light cone shape special model is designed as sensor nodes in wireless PIR sensor network, the distance and angle information of the target by peak time difference method and the detection region encoding way to detect. Secondly, through the measurement point into the detecting area of the sensor to determine the mode probability, selected effective location information of the target, realize the accurate positioning of the target. Finally, the trajectory of target is generated by polar sequence. Experimental results show that the proposed method can achieve the accurate positioning of target and improve the positioning accuracy effectively under limited target information, and reduce the impact of sensor detection error on positioning accuracy.
引文
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