一种基于双曲波束形成的多波束底检测技术

A method of multibeam bottom detection based on hyperbeam

基于能量的底检测技术在多波束测深系统中被广泛采用,但常规波束形成的波束宽度受到阵列孔径的限制,且旁瓣较高,造成能量泄漏,对基于幅度的海底检测技术造成一定难度,影响系统的检测性能。本文在分析双曲波束形成波束特性的基础上,将这种技术应用到基于能量的多波束底检测技术中,并通过实验数据分析,验证了在基于能量的底检测中引入双曲波束形成技术,可以在减小波束宽度的同时抑制旁瓣,从而有效提升系统检测性能。

The technology of bottom detection based on energy was widely used in multibeam swath bathymetry systems,but the beam width of conventional beam forming was restricted by the array aperture,and the high side lobe also led to energy leak,so it was difficult to the bottom detection which based on energy,and also deteriorated the detection performance of the system.This paper analyzed the beam character of hyperbeam,and then applied this technology to bottom detection,which was evaluated by experimental data recorded from shallow water.The results show that this technology decreased the beam width,at the same time suppressed the side lobe,consequently,it improved the detection performance of the system.