【作者】 许强； 梁军汀； 卢杰；

【Author】 XU Qiang;LIANG Jun-ting;LU Jie;Institute of Acoustics, Tongji University;

【机构】 同济大学声学研究所；

【摘要】 针对海底底质声学测量中对声波测量电路系统的要求,结合FPGA(现场可编程门阵列)和网络数据传输技术,开发研制了基于网络数传的超声触发及高速采集电路,解决了海底现场测量过程中超声触发信号的精确产生、多通道声波接收信号的高速同步采集以及大容量采集数据的存储和远距离传输等问题。本文简要介绍了研制电路的总体结构功能、工作原理及软硬件实现方法。测试结果表明,研制的电路模块工作稳定,配合多通道的发射接收,能够有效地完成海底环境下超声发射信号的精确控制和多路高速、高精度的接收信号采集任务。更多还原

【Abstract】 For the requirements on sound measurement circuit system in measuring the acoustic characteristics of the seafloor sediments, an ultrasonic trigger and high-speed acquisition circuit based on FPGA and Ethernet data transmission technology is developed. Furthermore, with which the problems of generating ultrasonic trigger signal accurately, high-speed synchronous multi-channel signals sampling, storage and long-distance transfer of large-capacity data etc. are solved. The overall structure function, operating principle,and soft-hardware realization of this circuit are presented in this paper briefly. The experimental results show that the developed circuit works stability, which can complete the tasks of controlling the ultrasonic emission signal accurately and collecting the receipt signal in high speed with the multi-channel transmitter and receiver circuits.更多还原