合成孔径声纳三维数据仿真研究

Research on Synthetic Aperture Sonar 3-D Data Simulation

提出了一种基于声线追踪技术的合成孔径声纳三维数据仿真模型。此仿真模型包括四个部分,即三维运动轨迹下点目标回波模型、基于三角面元的声线追踪和目标阴影区域计算模型、基于棱锥的波束照射区域计算模型、发射和接收波束指向性及目标散射特性等其它因素对合成孔径声纳回波数据的影响模型。点目标和体目标数据仿真结果表明此仿真模型可行,尤其是体目标仿真结果的阴影特征逼真,可以为合成孔径声纳信号处理、图像判读和目标自动识别研究的提供有力支持。

A synthetic aperture sonar 3-D data simulating model was brought out based on acoustic ray tracing techniques. The simulating model includes four parts： the echo model of point targets in 3-Dimensional track; the acoustic ray tracing and shadow computing model based on triangle faces; the pyramids illuminating area computing model; the influence model of array beam pattern and targets diffusing characteristics. Results on point target and 3-D target show that the model is practicable and can be used for the validation of SAS signal processing algorithm, processing of SAS images and targets recognition research.