Design Of The Vector Ocean Ambient Noise Field Monitoring And Data Analysis Software

The subsurface buoy system for observing the vector field of ocean ambient noise could observe and record the pressure and velocity of the acoustic field of ocean ambient noise,which has great significance in science and military. The software of vector ocean ambient noise field monitoring and data analysis is an important part of the system. The main function of the software includes four parts: the configuration of subsurface buoy system; vector noise data analysis; GPS data recording and ship track drawing; AIS data recording and real-time monitoring of surface ships.The main task of the thesis is the design and implementation of data analysis software and analyzing the characteristics of low frequency ambient noise in shallow sea combined with the software. The detailed works are as follows:Firstly, the demand for the software is analyzed based on the subsurface buoy system, the overall design of software and specific functional division are determined and the main working process of the software is designed. The implement of four main function modules in the software: serial interface module, information processing module, information display module and information management module are also designed in detail.Secondly, the key technologies used in the process of software realization are analyzed and studied, mainly including the dynamic linked list, multi-threading technology, database technology and application of the document calls. The applications of those technologies in the software implementation process are elaborated in detail.At last, combined with the AIS location information of the surface ship recorded by the data analysis software, the ambient noise data of the system is analyzed in the thesis, mainly including time features, frequency features and spatial features. Additionally, the effect of the surface ship on the shallow sea ambient noise in the band of 50Hz to 300Hz is analyzed particularly.In the sea trial,the reservation functions of the software of vector ocean ambient noise field monitoring and data analysis are completed. The software realizes the communication control to the subsurface buoy system and runs in a good condition. The results of data processing and display are correct.