基于沙蝎定位猎物的仿生震源定位方法

Bionic hypocenter localization method inspired by sand scorpion in locating preys

受沙蝎定位理论的启发,提出了一种新的仿生方法来解决震源信号定位问题。与传统方法不同的是,该仿生方法不需要提取信号到达的时间,而是通过一个脉冲发射模型间接提取时间信息。基于3/1构型的脉冲发射模型在兴奋与抑制相互作用下产生不同脉冲数,以此对震源信号进行脉冲编码,然后通过群向量编码计算得到目标方向。依据实际定位情况与生物进化的选择性,本文在沙蝎基跗节复合缝感受器(BCSS)的基础上对接收器的分布进行了改进,同时对改进前、后进行了对比,并且与常用的TDOA算法在仿真环境下进行了对比实验,结果表明,仿生方法在新的接收器分布下定位误差更小。为进一步验证仿生定位方法,共采集了76组真实数据,定位方向的平均误差为4.9310°。

Inspired sand scorpions in locating their preys,a novel bionic localization method is proposed to solve the problem of vibration event localization.Different from commonly used methods,a spike firing model is introduced to solve the problem of arrival picking.Based on the 3/1 configuration,each spike firing model fires different number of spikes.The vibration signal is coded into spike signal for orientation of the target using population vector code.According to the actual situation and the selectivity of the biological evolution,the distribution of the receivers is modified and compared with that of before modification.Also the bionic method is compared with the TDOA method in simulation environment.The orientation errors of the bionic method are smaller than that of the TDOA method.In addition,location experiment is carried out in an open area.The average error of landing orientation is 4.9310°for 76 sets of data,satisfying the orientation requirement.