一种机载激光测深回波信号的处理方法  

The Method for Processing Airborne Laser Bathymetry Echo Signal

作　　者：滕晓杰 岳军[1] 李宏升[1] 高洪秀[1] 冯宝成[1] 刘尊年[1] TENG Xiaojie;YUE Jun;LI Hongsheng;GAO Hongxiu;FENG Baocheng;LIU Zunnian(School of Science,Qingdao University of Technology,Qingdao 266520,China)

机构地区：[1]青岛理工大学理学院

出　　处：《海洋测绘》2019年第6期29-33,共5页Hydrographic Surveying and Charting

基　　金：国家海洋局海洋公益性行业科研专项(201305028)

摘　　要：利用回波信号的物理性质代替几何性质,将Darcy渗流方程与非线性扩散方程耦合,提出了一种基于多物理场的信号处理方法,通过有限差分方法进行离散化处理,实现对机载激光测深回波信号的处理。在此基础上,基于激光在海水中的传播特性,建立数学关系式,对机载532 nm激光测深系统回波信号进行数值模拟,利用多物理场信号处理方法对仿真模拟数据进行处理,并与传统滤波方法比较。实验结果表明,该方法可以很好地应用于机载激光回波信号的处理中,通过比较得出多物理场方法精度较高,算法稳定,验证了该方法的可行性与有效性。Using the physical properties of the echo signal instead of the geometric properties,the Darcy seepage equation is coupled with the nonlinear diffusion equation,this paper proposed a signal processing method based on multi-physical field.The finite difference method is used for discretization to realize the processing of airborne laser bathymetric echo signal.Based on the propagation characteristics of laser in seawater,establishing the mathematical relationship,the echo signal of airborne 532nm laser bathymetry system is numerically simulated.The multi-physical field signal processing method is used to process the simulation data,and compared with traditional filtering methods.The experimental results show that the proposed method can be well applied to the processing of airborne laser bathymetry echo signal.The comparison shows that the multi-physical method has high accuracy and stable algorithm.The feasibility and effectiveness of the method are verified.

关 键 词：机载激光测深 多物理场 有限差分法 回波信号处理 波形建模 

分 类 号：P229[天文地球—大地测量学与测量工程]