该文档介绍了用于接地网拓扑结构检测仪器传感器相关知识。
文档内容节选
129 GEM2 A New Multifrequency Electromagnetic Sensor IJ Won Dean A Keiswetter George RA Fields and Lynn C Sutton Geophex Ltd ABSTRACT A new broadband electromagnetic sensor GEM2 has been tested at several environmental sites for subsurface investigation A handheld digital multifrequency sensor based on an earlier similar helicoptertowed sensor GEM2 operates in a frequency range of 90 Hz to 22 kHz and can transmit an arbitrary waveform containing multiple frequencies The unit is capable o......
猜您喜欢
评论