直接光强检测方式分析激光遥测水下声场探测灵敏度  

Sensitivity Analysis of Underwater Sound Field with Laser Remote Sensing by Direct Detection

作　　者：谢晨[1] 陈名松[1] 周田华[1,2] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004 [2]中国科学院上海光学精密机械研究所先进激光技术与应用系统实验室,上海201800

出　　处：《发光学报》2009年第2期261-266,共6页Chinese Journal of Luminescence

基　　金：广西自然科学基金(0832012);广西区青年基金(0640065);广西研究生教育创新计划(2008105950810M415)资助项目

摘　　要：激光声遥感探测水下声信号技术,是比以往任何一种水声探测技术都先进的技术,但探测系统的灵敏度一直未曾分析。得出了在直接光强检测方式下表面微波的最小可探测幅度值,并且分析了最小可探测幅度值分别和探测高度、接收孔径的关系。在直接光强检测方式下,针对水下声场形成的表面微扰现象,通过建立探测系统的一维物理模型进行理论推算。直接光强检测方式下表面微波的最小可探测幅度值为0.424 4mm,当表面微波幅度超过该值时,探测系统灵敏度完全满足对水下声场的实时监测要求。Laser remote sensing of the underwater sound field is more advanced detection technology for underwater object search, however, the sensitivity of the detection system had not been analyzed. This article analyzed three laser remote sensing methods for underwater sound field, and then studied the surface micro-wave formed from underwater sound field. It was obtained through the theoretical calculation that the minimum detection limit of amplitude was 0.424 4 mm for surface microwave. By analyzing the relationship between the minimum detection limit of amplitude, the height of sender and the aperture of receiver, it was understood for the theoretical basis of influence factors for the detection of underwater sound field, also provided for the basic idea for improving sensitivity.

关 键 词：水下声场探测 激光声遥感 最小可探测幅度值 直接光强检测 

分 类 号：O422.2[理学—声学]