Metal detector and method in which mineralization effects are eliminated
US6583625B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 16, 2000 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | Oct 16, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/104
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Metal detector and method in which soil mineralization effects and responses to other undesired materials are eliminated. A periodic excitation signal is transmitted into an area where a target is to be detected, and signals returned by the target are processed to provide an output signal corresponding to the target. A plurality of signals are extracted from the output signal during different phase intervals in the period of the excitation signal and processed to provide signals which are free from ferrite response and/or response to other undesired materials. The signals which are free from response to ferrite and/or other undesired materials are then compared to identify the target.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.