自容式声学海流计数字处理系统设计  

Design of digital processing system of self-contained acoustic current meter

作　　者：吴振谦[1] 蒋志迪 俞牡丹 WU Zhen-qian;JIANG Zhi-di;YU Mu-dan(College of Science &Technology,Ningbo University,Ningbo 315212,China)

机构地区：[1]宁波大学科学技术学院,浙江宁波315212

出　　处：《传感器与微系统》2018年第12期66-68,共3页Transducer and Microsystem Technologies

基　　金：浙江省科技厅科技计划项目(2013C31019);国家高技术研究发展计划("863"计划)资助项目(2012AA091802);浙江省自然科学基金资助项目(LY12D06002)

摘　　要：针对自容式海流计的工作功耗和测流的较高实时性能要求,设计了一种"微处理器+现场可编程门阵列(FPGA)"系统构架的自容式声学海流计数字处理系统。低功耗处理器完成系统级的任务维护,并进行电源管理; FPGA模块应用复相关测频算法进行实时海流的测量;协同设计的微处理器与FPGA间软硬件接口保证了相互间的数据实时通信。实验测试结果为:系统在信噪比10 d B环境时测流误差不超过0. 94%;系统功耗低,待机功耗仅19 m W、工作功耗167 m W。For requirements of working power consumption and high realtime performance of serf-contained ocean current meter,a digital processing system of self-contained acoustic ocean current meter with an architecture of microprocessor plus field programmable gate array (FPGA),is designed,in which low power consumption processor achieves system level task maintenance and power management,and FPGA module fulfills reahime ocean current measurement adopting multiple correlation frequency measurement algorithm.Also,software-hardware interface between the microprocessor and the FPGA is designed to guarantee realtime data communication.Experimental results are given :the error of system is less than 0.94%in environment with signal to noise ratio(SNR)of 10dB, and power consumption is low,which is only 19mW standby and 167mW operating power consumption.

关 键 词：自容式海流计 数字处理系统 现场可编程门阵列 软硬件接口 复相关 

分 类 号：TP332[自动化与计算机技术—计算机系统结构]