水下金属管线埋深探测仪带通滤波器的优化设计  

Optimized design of band-pass filter in underwater metal pipe buried depth finder

作　　者：付国红[1] 田彪[1] 程辉[1,2] 李广[1] 

机构地区：[1]湖南科技大学先进矿山装备教育部工程研究中心,湘潭411201 [2]中国科学院地质与地球物理研究所,北京100029

出　　处：《地球物理学进展》2013年第5期2753-2758,共6页Progress in Geophysics

基　　金：国家自然科学基金项目(51205123);湖南省科技计划项目(2012TP4023-5;2012TP4023-6);湖南省自然科学基金湘潭市联合基金项目(12JJ9008);湖南省教育厅基金项目(12C0106;11C0515);湖南省高校科技创新团队支持计划项目联合资助

摘　　要：针对江河水下金属管线埋深探测需求,作者基于人工源电磁探测原理设计了水下金属管线探测仪,接收机中的窄带带通滤波器可从含有强噪声的混合信号中,很好地分离出特定频率的信号.作者推导了窄带带通滤波器的传递函数,进行了计算机仿真,并在仪器样机中得以应用.实验结果表明,优化设计的带通滤波器的中心频率误差小,通带内增益稳定,性能优良.An underwater metal pipeline detector is designed based on the principle of artificial source electromagnetic detection, which is used for detecting the deeply buried in underwater metal pipes. Narrowband band-pass filter in the receiver can well separate the specific frequency signal from mixed signal which is containing strong noise. Authors deduced the narrowband filter transfer function and simulated in computer, and the detector was applied in instrument prototype. Experiment results show that the error of the center frequency of the band-pass filter is small, and the gain is stable. In conclusion the detector has good performance.

关 键 词：管线探测 背景噪声 带通滤波器 

分 类 号：P631[天文地球—地质矿产勘探]