Pulse induction metal detector having high energy efficiency and sensitivity
US7649356B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2002 |
| Grant date | Jan 19, 2010 |
| Priority date | — |
| Expiry date | Dec 9, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/15
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pulse induction metal detector having high efficiency and sensitivity. Within the scope of the invention is a high efficiency hand-held metal detector for detecting a metal object, comprising a coil and a source of current flow in the coil. The source is adapted to produce one or more pulses of current in the coil. Preferably, at least two of the pulses are spaced apart in time at least about 20 microseconds during which current flow in the coil is substantially constant. The metal detector also comprises a detecting circuit for detecting a response to the current pulses, and a sampling circuit for sampling the response at predetermined times at least during the time of one of the pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.