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2 August 1999 Baseline performance of the U.S. Army's AN/PSS-12 metal detector
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This paper describes data collection efforts carried out at Fort A.P Hill VA with the US Army's hand held metal detector (MD) the AN/PSS-12. Our efforts were directed toward establishing the receiver operating characteristics (ROC) curves for the AN/PSS-12 thereby creating an objective measure of its baseline performance capabilities. Voltage- versus-time waveforms were recorded at two different locations in the AN/PSS-12's receiver circuitry: 1) After the first stage of amplification following the receiver coil, and 2) At the output of the step-2 difference amplifier just before its voltage-to-frequency converter. The latter signal was used to determine the frequency of the detector's audio output frequency-versus-position data was used to determine the baseline ROC for the AN/PSS-12 under the binary mine-no-mine hypothesis. Under this hypothesis, the baseline ROC for the detector is shown to lie close to the change diagonal, an expected result, since the detector's audio output offers the detector operator no way to discriminate between mines and metallic clutter objects. An improved 'ad hoc' detector is presented that has the ability to distinguish between mines and clutter objects based on spatial symmetry. Our symmetry detector operates on energy-versus-position data derived from the first type of data described above. The ROC for out symmetry detector is shown to lie well above the change diagonal.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Lloyd S. Riggs, Thomas Barnett, Larry T. Lowe, Jon E. Mooney, and Richard C. Weaver "Baseline performance of the U.S. Army's AN/PSS-12 metal detector", Proc. SPIE 3710, Detection and Remediation Technologies for Mines and Minelike Targets IV, (2 August 1999);

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