Airborne electromagnetic (EM) survey system
US7646201B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2008 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Jul 11, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/165
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An airborne electromagnetic survey system for conducting geological mapping is disclosed. A transmitter closed loop structure is used in the system and is designed for connection to a towing airborne vehicle. The transmitter loop structure comprises a plurality of interconnected loop segments, and transmitting means are fitted to at least one of the loop segments for generating and transmitting an earthbound primary electromagnetic field effective for geological surveying. Sensing means are fitted to the loop segments for receiving and sensing a vertical component of a secondary resulting electromagnetic field which arises from an interaction of the primary electromagnetic field with ground bodies that are traversed by the sensing means, while simultaneously nulling the primary electromagnetic field. Helical sensing means are positioned in close proximity to the transmitting means to receive and sense a horizontal electromagnetic field contained in the secondary resulting field, while simultaneously nulling the primary electromagnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.