Title :
An improved subsequent burial instrumented mine
Author :
Griffin, Sean ; Bradley, John ; Thiele, Maurice ; Tran, Cuong ; Grosz, Francis, Jr. ; Richardson, Michael D.
Author_Institution :
Omni Technol. Inc., New Orleans, LA, USA
Abstract :
Detection of buried mines using conventional sonars is difficult, especially in complex coastal environments, which complicates naval tactical decisions such as whether to hunt, sweep, or avoid a mined area. The US Navy is therefore supporting research to develop and validate stochastic, time-dependent, mine burial prediction models. This research requires continuous monitoring of both mine behavior during burial and the near-field processes responsible for burial. Modes of burial are generally separated into two broad categories: impact burial and subsequent burial (scour and fill, creep, liquefaction, and bedform modification). Omni Technologies, Inc. (OTI) and the Naval Research Laboratory (NRL) have developed instrumented mines that measure both subsequent mine burial behavior and the processes that initiate and effect burial. In this paper we describe new instrumented mines, including acoustic sensors used to measure burial and sensors used to measure mine orientation, azimuth and movement. Sensors and methods used to measure characteristics of surface gravity waves, direction and magnitude of bottom currents, turbulent flow near the mine, initiation of bedload motion, and sediment size and concentration in the water column are also described.
Keywords :
buried object detection; marine systems; military systems; sonar detection; Naval Research Laboratory; Technologies; US Navy; acoustic sensors; bedform modification; bedload motion; bottom currents; burial instrumented mine; buried mine detection; coastal environments; impact burial; liquefaction; mine azimuth; mine movement; mine orientation; naval tactical decisions; sediment size; sonar; stochastic mine burial prediction models; subsequent burial; surface gravity waves; time-dependent mine burial prediction models; turbulent flow; water column concentration; Acoustic measurements; Acoustic sensors; Creep; Instruments; Monitoring; Predictive models; Sea measurements; Sensor phenomena and characterization; Sonar detection; Stochastic processes;
Conference_Titel :
OCEANS '02 MTS/IEEE
Print_ISBN :
0-7803-7534-3
DOI :
10.1109/OCEANS.2002.1193250