Abstract To better suppress the influence of power frequency interference on the observation signal, based on the analysis of the source of power frequency interference, the classification of power frequency interference and the influence of power frequency interference on the observation, we compare and analyze the commonly used power frequency common mode interference and power frequency serial mode interference suppression methods, so as to suppress the power frequency serial mode interference in the design of DCY-I geoelectric field observation instrument by using the method of oversampling and multi-level digital filtering. We use the two-level floating ground method to suppress the power frequency common mode interference, which can play a good suppression effect on the power frequency interference.
ZHANG Xingguo,WANG Lanwei,HU Zhe et al. Power Frequency Interference Suppression Mechanism of DCY-I Geoelectric Field Instrument[J]. jgg, 2024, 44(2): 209-216.
ZHANG Xingguo,WANG Lanwei,HU Zhe et al. Power Frequency Interference Suppression Mechanism of DCY-I Geoelectric Field Instrument[J]. jgg, 2024, 44(2): 209-216.