Marine Towed Array: Underwater EMI Sensor Platform for Metallic Item Detection
Abstract
The technological focus of this project is to replace the electromagnetic induction (EMI) sensor array originally designed for the marine towed array (MTA), developed under Strategic Environmental Research and Development Program (SERDP) and Environmental Security Technology Certification Program (ESTCP) funding, with one based on advanced EMI electronics and sensor designs. The upgraded EMI array performs as well in salt water as it does on land. Transmit currents are lower than planned, and noise levels encountered experimentally were 2-3x larger than those seen in air, on land. To improve SNR to the levels required to meet the projects design goals would require either: a) new transmitter loops with heavier gauge wire, or b) a new bipolar transmitter capable of using higher supply voltages. The MTAs EMI array was successfully upgraded to incorporate a more modern, AGC-grade EMI data acquisition system, transmitter loops, and tri-axial receiver cubes. The MTA was and remains ideally suited for deployment in relatively flat-bottoms, open areas such as bays where munitions transfers occurred ship to ship.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 28, 2020
- Accession Number
- AD1169179
Entities
People
- Daniel A. Steinhurst
- Glenn R. Harbaugh
- Grace M. Massey
- S. P. Mulvaney
- Thomas H. Bell
Organizations
- Leidos
- Nova Research Company (United States)
- United States Naval Research Laboratory
- Virginia Institute of Marine Science