Airborne Laser-acoustic Remote Sensing for Shallow Water Depth
To focus high energy pulsed CO<,2> laser radiation on sea surface, the interaction between laser radiation and water might produce acoustic pulse in water, which is called laser-acoustic phenomenon. As a novel kind of sound source, it has some advantages such as short pulse width, abundant frequency components and convenient flexibility, which make it available for remote sensing applications. Studies indicate that it is possible to remotely sense shallow water depth by means of laser-acoustic technique on helicopter. In this paper, the sound generating mechanism including thermoelastic, vaporization and dielectric breakdown, and characteristics of laser-acoustic pulse including sound-source level, spectrum and directivity are introduced first. Then laser-acoustic remote sensing technique is described. The preliminary experiment results of remote sensing sea-bottom are also presented.
Tian Zuoxi Men Lijie Li Rongfu Cui Guihua
Dalian Scientific Test & Control Technology Institute, Dalian 116013, china
国际会议
北京
英文
357-365
2007-10-01（万方平台首次上网日期，不代表论文的发表时间）