Geometrics and SERDP Work Together in Munitions Study
Objective
The objective of this project was to build, test, and characterize a diver-held ferrous metal detector array with real-time processing algorithms that accurately determines the position, depth, and size of magnetic anomalies from unexploded ordnance (UXO). This was accomplished by using an array of prototype low-power, miniature, total field atomic magnetometers, designed using new miniaturized electronics and a novel digital approach.
Specific technical objectives were as follows:
- Design and build an optimal array of total field sensors,
- Design and implement real-time anomaly detection and analysis, yielding location, depth, and size of detected anomalies,
- Test, characterize, and optimize the performance of the system,
- Design digital electronics to drive the sensors.
Technical Approach
Total field atomic magnetometer sensors are often used in making detailed surveys of underwater sites containing UXO. Such sensors are deployed on large wings or tow bodies.
After the data are gathered, scientists typically plot and analyze them, then populate lists of targets requiring remediation.
Finally, divers return to relocate these targets and the objects are removed.
We previously developed atomic magnetometer sensors whose power consumption is an order of magnitude lower than previous magnitometers. This enabled the design of small systems containing two-dimensional sensor arrays that have the desirable sensitivity and noise immunity properties of existing magnetometer devices.