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Active underwater detection with an array of atomic magnetometers.
Applied Optics
|May 2, 2018
Summary
This study demonstrates real-time tracking of conductive targets using atomic magnetometer arrays in magnetic induction tomography. This technology shows high success rates for detection and localization in air and water.
Area of Science:
- Physics
- Sensor Technology
- Geophysics
Background:
- Magnetic induction tomography (MIT) traditionally faces challenges with target detection and localization in diverse media.
- Atomic magnetometers offer high sensitivity and tunability, enabling novel probing techniques.
Purpose of the Study:
- To demonstrate active detection, localization, and real-time tracking of conductive, nonmagnetic targets using a 2x2 array of radio-frequency atomic magnetometers in an MIT configuration.
- To evaluate the system's performance in different media, including air and saline water, and assess its penetration capabilities.
Main Methods:
- Utilized a 2x2 array of radio-frequency atomic magnetometers configured for magnetic induction tomography.
- Employed active probing techniques to detect and track conductive, nonmagnetic targets.
- Tested the system's performance in air and saline water environments at various distances.
Main Results:
- Achieved 100% success rate for automatic target detection and 93% success rate for automatic target localization.
- Demonstrated successful detection and tracking of targets up to 190 mm in air and 100 mm underwater.
- Highlighted the system's sensitivity and tunability for effective penetration in different media.
Conclusions:
- Magnetic induction tomography with atomic magnetometer arrays is a viable technology for active target detection and localization.
- The system's performance in diverse media suggests broad applicability across various industries.
- Anticipated applications include civil engineering, oil and gas, geophysics, marine science, archaeology, search and rescue, and security.
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