Developments of Non-contact Data Acquisition Techniques in Electrical and Electromagnetic Explorations
Developments of Non-contact Data Acquisition Techniques in Electrical and Electromagnetic Explorations
复制标题
电电磁勘探中非接触式数据采集技术的进展
DOI：
10.3997/2352-8265.20140011
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
T. Kobayash
中科院分区：
文献类型：
--
作者：
H. Shima;S. Sakashita;T. Kobayash
本文介绍了两种非接触式电法和电磁法勘探技术。一种是使用我们最近开发的电容电极的表面电探测技术。电容电极既可以向地面注入电流，又可以测量地面的电势，这使我们能够进行非接触表面的电剖面。另一种方法是井眼电磁层析成像，它传输磁场并测量二次磁场。它不需要与地面直接接触。作者为这两种技术开发了原型数据采集系统，并进行了两次现场实验。第一次实验的结果表明，可以跟踪速度为3.6 km/h的多通道电容电极阵列，探测深度为6 m。第二个实验表明，EM层析成像可以使用干井或内衬塑料套管的井来绘制地下电阻率结构。
This paper describes two non-contact electrical and electromagnetic exploration techniques. One is surface electrical exploration technique using a capacitive electrodes we recently developed. A capacitive electrode enables both injecting an electric current into the ground and measuring the ground's electric potential, which allow us to conduct non-contact surface electrical profile. The other method is borehole electromagnetic (EM) tomography, which transmits a magnetic field and measures the secondary magnetic field. It does not require direct contact with the ground. The authors developed prototype data acquisition systems for these two techniques and conducted two field experiments. The results of the first experiment show that it is possible to trail a multi-channel capacitive electrode array having a speed of 3.6 km/h and explore to a depth of 6 m. The second experiment demonstrated that EM tomography can map the underground resistivity structure using dry holes or boreholes lined with plastic casing.