大耳蝠耳廓模型频扫特性的研究  

Frequency driven scanning characteristic of a pinna model inspired from the Brown Big-eared bat (Plecotus auritus)

作　　者：王福勋[1] 庄桥[2] 张智伟[3] 

机构地区：[1]山东大学信息科学与工程学院,济南250100 [2]中国科学院声学研究所,北京100190 [3]山东大学物理学院,济南250100

出　　处：《声学学报》2010年第1期26-30,共5页Acta Acustica

基　　金：国家自然科学基金(10774092);国家基础科学人才培养基金(J0730318)资助项目

摘　　要：以大耳蝠耳廓外形参数为基础,提出了一种由线、面结构得到的简化斜截式喇叭模型,应用有限单元法对该模型进行数值仿真计算,分析了其远场声场方向性随频率在垂直和水平方向的变化。结果表明,与大耳蝠耳廓模型相比,该模型具有更宽的频扫频带;水平方向上有更好的频扫方向性;垂直方向上有更大的扫描角度范围。并且,应用具有频扫特性的天线,可得到一种单基站无线定位方法。According to the parameters of a Brown big-eared bat＇s pinna, a simple obliquely truncated bat ear model made by line and plane was designed, then the model was numerical simulated with finite element method, the change of far-field directivity was analyzed in vertical and azimuth direction as the frequency increased. The results show that, comparing with the pinna of the Brown big-eared bat, the model has the advantages in wider bandwidth of frequency driven scanning, better directivity in azimuth, larger angle scales in elevation. In addition, using a frequency driven scanning antenna, a wireless positioning method based on single base station could be gotten.

关 键 词：模型 耳廓 特性 数值仿真计算 水平方向 有限单元法 外形参数 扫描角度 

分 类 号：Q954[生物学—动物学]