Subsurface resistivity measurements using square waveforms

Author

Gasulla-Forner, Manel ; Jordana-Barnils, Josep ; Pallás-Areny, Ramón ; Torrents, Josep Maria

Author_Institution

Div. d´´Instrum. i Bioenginyeria, Univ. Politecnica de Catalunya, Barcelona, Spain

Volume

47

Issue

1

fYear

1998

fDate

2/1/1998 12:00:00 AM

Firstpage

74

Lastpage

77

Abstract

This work analyzes the effect of inductive and capacitive coupling between the injecting circuit and the detecting circuit in resistive field surveys. Theoretical and experimental results demonstrate that if a square waveform is injected into the soil, and synchronous sampling is used to sample at the flat zone of the detected voltage, then the effect of the interference is greatly reduced. Furthermore, square waveforms are easier to generate than sinusoidal waveforms, so they offer a new approach to subsurface resistivity measurements

Keywords

buried object detection; electric impedance measurement; electrical conductivity measurement; electromagnetic coupling; electromagnetic interference; geophysical prospecting; geophysical signal processing; signal sampling; soil; terrestrial electricity; EM coupling; EMI; buried structure detection; capacitive coupling; data acquisition; detecting circuit; geoelectrical prospecting; inductive coupling; injecting circuit; interference effect; resistive field surveys; soil measurements; square waveforms; subsurface resistivity measurements; synchronous detection; synchronous sampling; Conductivity; Electrodes; Electromagnetic measurements; Frequency; Impedance measurement; Interference; Pollution measurement; Radar detection; Sampling methods; Voltage;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.728793

Filename

728793