摘要
为了满足多波束声纳系统中高声源级发射与多通道低噪声采集的需求,同时为了提高发射机与接收机的可扩展性,提出了一种高压脉冲发射模块以及一种多通道TVG(time variation of gain)采集模块的设计方法,并且采用FPGA作为逻辑控制芯片,在FPGA内规划了发射模块与采集模块的触发时序。根据千兆以太网的传输带宽,设计了IP报文的数据格式,分析了数据传输路径,实现了实时数据采集。实验测试表明,在100 kHz工作频率下时,发射模块的声源级达到了200 dB,采集模块的本底噪声小于4μVrms,幅度一致性偏差为-6.94 dB,相位一致性偏差为0.25°。
In order to meet the requirements of high acoustic source level emission and multi-channel low noise acquisition in multibeam sonar system,and to improve the scalability of transmitter and receiver,this paper introduces the design method of a high voltage pulse transmitter module and a multi-channel data acquisition module with TVG function,and uses FPGA as the logic control chip to plan the trigger timing sequence of the transmitter module and the acquisition module.According to the transmission bandwidth of Gigabit Ethernet,the data format of IP packet is designed,the data transmission path is analyzed,and the real-time data acquisition is realized.The experimental test shows that at the operating frequency of 100 kHz,the sound source level of the transmitter module reaches 200 dB,the background noise of the acquisition module is less than 4μVrms,the amplitude consistency deviation is-6.94 dB,and the phase consistency deviation is 0.25°.
作者
龚泯宇
郭世旭
田皓文
Gong Minyu;Guo Shixu;Tian Haowen(College of Metrology and Measurement Engineering,China Jiliang University,Hangzhou 310018,China)
出处
《电子测量与仪器学报》
CSCD
北大核心
2022年第1期141-148,共8页
Journal of Electronic Measurement and Instrumentation
基金
国家自然科学基金青年基金(11904346)
浙江省自然基金青年基金(LQ19A040004)项目资助
