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Sound waves are in a better transmission characteristics of the ocean carrier , ocean access to information , underwater target detection , location , identification, underwater acoustic communications are based on sound waves as the carrier . In the marine environment monitoring , hydroacoustic equipment development and testing , acoustic theory research and validation acoustic science and technology , we need a long time to obtain a continuous acoustic information . This design of large-capacity signal acquisition and storage system capable of continuous , automatic , real-time , high-capacity storage to capture the signal information . System based on DSP, MSP430 MCU and multi SDHC, MicroSDHC card design , DSP as the core of the system is responsible for data collection and storage , SDHC and MicroSDHC card as the storage medium , and FAT32 file system as a storage form of SCM is responsible for the circuit communication and control system integrated reader function, using USB2.0 interface to read data. TMS320VC5509A system adopts MSP430 MCU and low power consumption , help to reduce the system's total power consumption. SD2.0 specification SDHC card is in line with a large-capacity SD card , it has a large capacity , low power consumption , small size , low price advantage , a single card can reach the maximum storage capacity of 32GB. DSP5509A integrates on-chip MMC / SD controller can be used with SDHC card interface directly on the electrical connections . Systems and software control via the bus topology to achieve a multi- card storage design, greatly expanded the system's storage capacity. Paper focuses on the system's hardware and software design . Hardware design, including the performance characteristics of the device , the circuit structure and the functions. Software section describes the main contents SD2.0 specification given SDHC card initialization identification and data transmission method underlying driver , FAT32 file system specification describes the contents of the file realization of the principle , and gives the program implementation. Finally, the system parameters are measured , the test results are summarized , the improved method . The system has a large storage capacity , low power consumption , versatility, ease of use of the advantages of having a broad application prospects .
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