Transient electromagnetic field detection apparatus having dynamic emission source in combination with static emission source and transient electromagnetic field detection method for discovering unexploded ordnance
US11768058B2 · kind B2 · utility
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Inventors
Key dates
| Filing date | Aug 21, 2020 |
| Grant date | Sep 26, 2023 |
| Priority date | — |
| Expiry date | Dec 19, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A detection method for discovering an unexploded ordnance includes: surrounding a detection region with a transmitting coil and surrounding a detection site with a second receiving coil; conducting the transmitting coil with a second electric current; respectively acquiring a plurality of second feedback signals at a plurality of second feedback time points; partitioning the transmitting coil into a plurality of dipoles, and acquiring a plurality of distance values r respectively between the plurality of dipoles and the detection site; respectively calculating feedback depths according to feedback time periods; respectively calculating apparent resistivity values corresponding to the feedback depths; obtaining an apparent resistivity distribution in depth at the detection site according to the apparent resistivity values and the feedback depths; and judging whether there is any unexploded ordnance at the detection site according to the apparent resistivity distribution in depth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.