Research And Implementation Of DSP Software Based On Gaussian Beam Ray Tracing Theory

The research work of underwater acoustic system and theory is more complicated.The depiction of underwater sound field helps to guide the improvement of the performance of the sonar system,and the mathematical simulation of the underwater acoustic theory algorithm.Therefore,the underwater sound field modeling is more It has received the attention of practitioners in the underwater acoustics industry in various countries,and related system facilities have emerged one after another.In the field of sound field simulation,ray acoustic theory has a wide range of applications in hydroacoustics because of its clear physical image,fast calculation speed and wide application range.In recent years,the research on underwater unmanned equipment is in full swing,and the depth of its research is getting higher and higher.In order to improve the search and detection capability of underwater unmanned platforms,and assist the surface underwater ship to complete the detection and positioning function,it can be underwater.The sound field modeling and simulation software is embedded on the device,and the local sound field information is obtained by combining the water domain information to improve the self-sufficiency and target detection effect of the underwater unmanned equipment in underwater detection.In this thesis,the theory of ray acoustics and Gaussian beam is introduced and studied.The trajectory equation of the acoustic ray is obtained through the study of ray acoustic theory,which provides algorithm support for the sound ray tracing theory of software,and it combines the variation law of Gaussian beam at the interface.A Gaussian beam ray tracing model based on GBT theory be aquired,through which the software can obtain complete sound field modeling data,that including CIR、sound field sound field attenuation and sound trajectory coordinates.Combined with SYS/BIOS system that can be tailored,the software realizes the parameter network transmission between DSP and the host computer,and the inter-core communication function between the main core and the slave core.The main core completes the parameter acceptance,data storage management and data output,and the slave core completes the Gaussian beam ray tracing operation.The final result shows that the multi-core TMSC3206678-based underwater acoustic channel data simulation software designed in this paper can realize the corresponding sound trajectory tracking based on the parameters such as the specified sound velocity profile data and the soundtrack tracking range,and obtain the target position channel impulse response.Get functions such as spatial sound intensity distribution data.These features will help the unmanned platform’s search capabilities at low power.