Patent · US Expired

Method of investigating the electrical resistivity of the ground and apparatus for use in the method

US4246538A · kind A · utility

5Cited by
2References
10Claims
0Family size

Inventor

Key dates

Filing dateOct 2, 1978
Grant dateJan 20, 1981
Priority date—
Expiry dateOct 2, 1998

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01R27/20
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

In a method of investigating the electrical resistivity of the ground, five electrodes are implanted in the ground at equal spacings along a straight line. An electrical current is passed through the ground between one pair of these electrodes and the potential difference between a further pair of the electrodes is measured. The electrode which is not used in this measurement is at one end of the line. A further measurement is then made with the four electrodes which exclude the electrode at the opposite end of the line. The measurements are combined to provide a measurement of apparent resistivity which is almost unaffected by a local resistivity variation.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.