Underground exploration apparatus
US7109718B2 · kind B2 · utility
9Cited by
1References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2005 |
| Grant date | Sep 19, 2006 |
| Priority date | — |
| Expiry date | Oct 25, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A current to be applied to a ground is defined as the sum of two sinusoidal waves having first and second frequency components. A signal to be used at the time of synchronous detection is defined as a difference between the sinusoidal waves having the first and second frequency components. As a result, a substance in the ground, and the position and depth of the substance can be specified with high accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.