Research On Longtime Seabed Noise Collection Technology

With the rapid development of marine technology, ocean noise, people more and more in-depth exploration. Understanding of ocean noise on various marine life, underwater acoustic equipment design and use of mines, torpedoes and other underwater weapons improvements and reduce ship noise are essential. So the study of marine noise of great significance and good development prospects.The main task of this topic is in the frequency of 20Hz ~ 20kHz bandwidth, according to the noise characteristics and the characteristics of the marine environment, development and design a long submarine audio capture storage device, to achieve a sound long Submarine Acquisition and Storage. And three months of sea trials conducted by the data playback and processing to achieve good test results.In this paper, complete the following tasks:1, in analyzing the system design requirements, according to the system with low power consumption, power management, mass data storage, data playback and work fast water depth and other special requirements, proposed design scheme, the circuit control design, software design and mechanical structure of control design.2, according to mass data storage, low power, small size of the special requirements, design by 32 2GB FLASH chips, industrial-grade storage unit. The total capacity of 64GB. Directory in accordance with 64 organizations, to achieve a mass data storage, low power, small size requirements.3, according to the special requirements of low power system, using a variety of methods to reduce system power consumption, low power consumption to meet the system requirements.4, playback speed according to system data requirements for the USB transmission unit hardware and software design.5, completed several tests and underwater tank testing a long time, and playback of data processing, experimental results show the system to meet the design requirements.