Subsurface resistivity measurements using square waveforms

Author

Gasulla, Manel ; Jordana, Josep ; Pallàs-Areny, Ramón ; Torrents, J.M.

Author_Institution

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

Volume

2

fYear

1997

fDate

19-21 May 1997

Firstpage

1252

Abstract

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

Keywords

electric sensing devices; electrical conductivity measurement; geophysical techniques; signal sampling; soil; square-wave generators; archeology; capacitive coupling; detected voltage; detecting circuit; flat zone; geoelectrical prospecting; inductive coupling; soil; square waveform; subsurface resistivity measurement; synchronous sampling; underground pipes; Circuits; Conductivity; Electrodes; Frequency; Impedance measurement; Interference; Pollution measurement; Sampling methods; Soil; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 1997. IMTC/97. Proceedings. Sensing, Processing, Networking., IEEE

Conference_Location

Ottawa, Ont.

ISSN

1091-5281

Print_ISBN

0-7803-3747-6

Type

conf

DOI

10.1109/IMTC.1997.612399

Filename

612399