Soil Electromagnetic Properties and Metal Detector Performance: Theory and Measurement

Abstract

Metal detectors are unquestionably the workhorses of humanitarian demining. Although hybrid dual-sensor systems incorporating a ground penetrating radar (GPR) have recently been introduced and are gaining acceptance, a standard electromagnetic induction (EMI) sensor remains the primary mode of detection. Despite ongoing evolution and refinement of metal detector technology, however, the practical performance of both continuous wave (FDEM) and pulse induction (TDEM) systems continues to be restricted by so-called "soil noise" effects. Generally, "problem" or "difficult" soils reduce signal to noise ratio and increase the false-detection rate. At certain locations, the soil effect is so severe as to render a given metal detector practically inoperable.

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Document Details

Document Type
Technical Report
Publication Date
Nov 17, 2008
Accession Number
ADA509654

Entities

People

  • Guy Cross

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Computational Science
  • Detection
  • Detectors
  • Eddy Currents
  • Electric Fields
  • Electrical Conductivity
  • Electrical Properties
  • Electromagnetic Fields
  • Electromagnetism
  • Magnetic Fields
  • Magnetic Properties
  • Measurement
  • Resonant Circuits
  • Test And Evaluation
  • Test Methods
  • Two Dimensional
  • Waveforms

Readers

  • Military/Explosive Ordnance Disposal (EOD) Technology
  • Radar Systems Engineering.
  • Systems Analysis and Design