用正向供电技术提高视电阻率观测精度

IMPROVING THE OBSERVATION ACCURACY OF APPARENT RESISTIVITY BY USING UP￣DOWN TRANSMISSION

定量地实验研究了在采用不同观测方法时相同干扰对视电阻率测量的影响。结果表明，采用正反向供电方法可大幅度提高视电阻率的观测精度。同时还在ＺＤ８地电仪上实现了这种观测方法，试验结果与理论推算值基本相符。

In the paper, influences of the same interference on measurement results of apparentresistivity are quantitatively studied by using different observational methods. It is shownthat observation accuracy of apparent resistivity could be improved greatly through up--downtransmission. This observation method is applied to ZD8 geoelectric instrument and experimental results can be reproduced by the theoretical calculations basically.