摘要
针对频率域电磁法仪器采集系统实时处理数据的要求,在设计一个基于DSK6713的高精度24位A/D采集系统的硬件基础上研究数字锁相技术处理数据的应用。利用数字锁相技术获取一次场、二次场多频信号的同相分量和垂相分量,再利用专业软件将归一化PPM值转换成电导率和磁导率,继而成像获取地下信息。
According to the requirement of real-time data processing for FEM instrument DAS, a high precision 24-bit DAS was designed based on DSK6713 and the application of digital lock-in technique in data processing was studied. The in-phase and quadrature components of the multi-frequency signals in primary and secondary fields are obtained using digital lock-in technique. Then the PPM values are converted into conductivity and susceptibility using professional software, so that the underground information is obtained.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2006年第11期1395-1398,共4页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(400127003)资助项目。
