Design & Implementation Of Power Management & Acquisition Control Base On Underwater Acoustic Buoy System

Underwater acoustic buoy is widely used in underwater acoustic experimental data acquisition and storage. The system is based on single vector hydrophone. It provides data acquisition and storage. In order to reduce the cost of power, the system adopts the power management circuit.The system is composed of hardware and software. The hardware is consisted of on-duty circuit board, signal acquisition circuit board and acquisition control & data storage circuit board. The on-duty circuit board is composed of conditioning circuit, demodulation circuit, comparator circuit and SCM (Single Chip Micyoco) and its peripheral circuit. It implements detection of signal or noise and electrify the digital circuit. There is a four-way signal input on the signal acquisition circuit board, which implements signal conditioning and analog-digital conversion. Acquisition control & data storage circuit board is consisted of DSP, FPGA and their peripheral circuit.The software is programmed for the detection of pulse width. The RTOSμC/OS-Ⅱ,μC/FS file system are transplanted in the DSP as well as the gain code, the SD card driver and the data acquisition & storage programs.The capability of on-duty circuit, data aqcuisition and storage has been tested in laboratory. The tank trial results confirm that the overall function reaches the system requirements and fully fulfils the anticipated target.