A Design of Passively Omnibearing Directivity Acoustic Cylinder Array

Abstract

A acoustic cylinder array of passively omnibearing directivity is designed, including receiving element, transmission and control system, whose characters are: firstly there are N ×M signal receiving elements in the array, and N linear arrays well-proportioned arrangement, meanwhile the first element of each array lain at the top of acoustic cylinder array constitute a M elements uniform circle array; Secondly, located in the same transversal surface array elements connect with the input ports of selecting switch electrocircuit, simultaneously the output ports of latter connected with receiver electrocircuit; At last, electrocircuit generating beam forming weights link to output terminus of receiver electrocircuit by multiplier, whose output data going to processor through data output bus. The design achieves the capability of acoustic target location omnidirectional and tridimensional. It overcomes the default of location accuracy low caused by array aperture restriction of acoustic detection equipment, furthermore improves the three-dimensiona accuracy on target detection.