Research On Wireless Remote Data Acquisition Technique For Underwater Acoustic Buoy

Underwater acoustic buoy is a usefull tool in the underwater acoustic research and engineering application, it has a lot of advantage, such as low interference background and long time of observation and large data storage. The data acquisition is the most important function for the electronic system of underwater acoustic buoy. Because of the limit of wireless transmission technique, the tranditional data acquisition system of underwater acoustic buoy mainly uses the method of self-storage to save data or remotely transmits data by optical cable. With the development of underwater acoustic technology, it is necessary to improve the ability of data acquisition and data transmission. And the development of wireless network communications makes it to be possible to achieve the big capacitance storage and high speed wireless remote communications. The research about the realization of wireless remote acquisition system in this thesis is based on these backgrounds.In this thesis, a wireless remote acquisition system used in buoy is designed. This system is composed of hardware part and software part and the data transmission of this system is based on wireless ethernet bridge. The hardeware part is made up of a piece of TMS320VC5509A DSP chip which is the hardcore of this part, a piece of FPGA chip and CS8900A chip which assist the DSP chip to accomplish the control and data transmit task. The analogy circuit has four analogy channels, which have the abilities of amplification, gain control and filter. In order to satisfy the system specification and improve its reliability, the Real-Time Operating SystemμC/OS-Ⅱ, LWIP TCP/IP Stack, andμC/FS File System are used in the software part, and the software of data acquisition, data storage, data read and data transmission are programed.This data acquisition system has been debugged and tested successfully in the laboratory and it achieved the design specfications. At last, some improved suggestion and further research expectation about this system are given.