Accession Number : ADA294394

Title :   Physics of Buried Mine Detection and Classification.

Descriptive Note : Final technical rept.,

Corporate Author : TEXAS UNIV AT AUSTIN APPLIED RESEARCH LABS

Personal Author(s) : Chotiros, Nicholas P. ; Muir, Thomas G. ; Smith, D. E.

PDF Url : ADA294394

Report Date : 12 MAY 1995

Pagination or Media Count : 15

Abstract : The physics of buried mine detection in offshore sediments and in the surf zone was investigated. Optical techniques are useless because they cannot penetrate sediments while magnetic techniques are of low value because of low resolution, short range, and the introduction of non-magnetic mines. For buried mine detection in the off-shore sediment acoustic penetration at shallow grazing angles was explored. An experiment was conducted jointly with SACLANTCEN to measure sound propagation into a sediment in the 500 Hz to 2 kHz band, and a theoretical fast field model was developed to model the penetration. In the surf zone, where bubble clouds are expected to render acoustic methods unreliable, seismic sonar methods were explored as a means to echo range off buried targets. Tests with controlled pulses revealed that the far-field response was dominated by two interface waves. The results have been very encouraging.

Descriptors :   *MINE DETECTION, *PHYSICS, *MODEL TESTS, *ACOUSTIC MEASUREMENT, *BURIED OBJECTS, *SEDIMENTS, *OFFSHORE, ANGLES, CLOUDS, MEASUREMENT, METHODOLOGY, OPTICS, MAGNETIC FIELDS, MAGNETIC PROPERTIES, MODELS, INTERFACES, ACOUSTIC WAVES, THEORY, FAR FIELD, TARGETS, PENETRATION, PULSES, RESPONSE, BUBBLES, SOUND TRANSMISSION, SHORT RANGE(DISTANCE), SONAR, LAND MINES, LOW RESOLUTION, SEISMOLOGY, ECHO RANGING, SURF, MINES(ORDNANCE), SHALLOW DEPTH, GRAZING.

Subject Categories : Physical and Dynamic Oceanography
      Seismology
      Underwater Ordnance
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE