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요약정보
投弃式海流电场剖面仪中模拟电路的研制 / Development of the Analog Circuit in Expendable Current Profiler
Resource Type
Academic Journal
Authors
李鹏宇
;
张启升
;
周珂宇
;
林祖灿
;
蒋兴远
;
LI Pengyu
;
ZHANG Qisheng
;
ZHOU Keyu
;
LIN Zucan
;
JIANG Xingyuan
Source
现代地质 / Geoscience
. 37(1):107-113
Subject
投弃式海流电场剖面仪
模拟电路研制
信号采集
微弱信号
Language
Chinese
ISSN
1000-8527
Online Access
Find it @ DONGA
초록
投弃式海流电场剖面仪(XCP)是利用海流切割地磁场产生感生电场的原理进行快速测量海流的观测仪器,在地磁场稳定的情况下,感生电场的大小主要取决于海流的速度.因此,通过测量海流产生的感生电场便可以研究海流的运动特征.本文研制了用于XCP中的模拟电路,实现了对XCP中电极信号、罗盘线圈信号及温度信号的采集预处理.所设计模拟电路主要实现以下功能:(1)通过INA128放大电路实现对电极信号与罗盘线圈信号的多级放大处理;(2)考虑到电极信号与罗盘线圈信号均为频率16 Hz左右的信号,在电路中加入中心频率点为16 Hz的二阶带通滤波电路以提取有效信号;(3)进行硬件电路补偿,在一定程度上克服XCP探头下沉引起感生电场的强干扰.实验测试结果表明,所设计模拟电路稳定可靠,可以实现滤除噪声,提取前端微弱信号并进行多级放大,满足实际应用需求.
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