Ground standoff mine detection system (GSTAMIDS) engineering, manufacturing, and development (EMD) Block 0

Pressley, Jackson Robert; Pabst, Donald; Sower, Gary D.; Nee, Larry; Green, Brian; Howard, Philip N.

doi:10.1117/12.445448

Cited by 4 publications

(3 citation statements)

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“…These passes are usually either "clean," with all mines easily detectable, or very noisy with several weak mine signatures. Thus, the performance is either close to optimal, and cannot be improved any further, or poor and cannot be improved, as many of the mines could not be detected using 1 The performance criterion for the vehicle-mounted mine detection system technology was set to 0.02/m 2 FAR at 90% PD, and is described in [36]. the current preprocessing and feature representation techniques.…”

Section: Resultsmentioning

confidence: 99%

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Real-Time Landmine Detection with Ground-Penetrating Radar Using Discriminative and Adaptive Hidden Markov Models

Frigui

Gader

2005

EURASIP J. Adv. Signal Process.

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We propose a real-time software system for landmine detection using ground-penetrating radar (GPR). The system includes an efficient and adaptive preprocessing component; a hidden Markov model- (HMM-) based detector; a corrective training component; and an incremental update of the background model. The preprocessing is based on frequency-domain processing and performs ground-level alignment and background removal. The HMM detector is an improvement of a previously proposed system (baseline). It includes additional pre- and postprocessing steps to improve the time efficiency and enable real-time application. The corrective training component is used to adjust the initial model parameters to minimize the number of misclassification sequences. This component could be used offline, or online through feedback to adapt an initial model to specific sites and environments. The background update component adjusts the parameters of the background model to adapt it to each lane during testing. The proposed software system is applied to data acquired from three outdoor test sites at different geographic locations, using a state-of-the-art array GPR prototype. The first collection was used as training, and the other two (contain data from more than 1200 m2 of simulated dirt and gravel roads) for testing. Our results indicate that, on average, the corrective training can improve the performance by about 10% for each site. For individual lanes, the performance gain can reach 50%

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Section: Resultsmentioning

confidence: 99%

“…The GPR sensor system is mounted underneath a vehicle to provide a three-meter detection swath [30]. When the vehicle moves, the GPR transmit antenna sends out pulses that penetrate to the ground and the receive antenna captures the returned signal in order to facilitate the detection of landmine.…”

Section: Gpr Sensormentioning

confidence: 99%

Real-Time Landmine Detection with Ground-Penetrating Radar Using Discriminative and Adaptive Hidden Markov Models

Frigui

Gader

2005

EURASIP J. Adv. Signal Process.

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“…Figure 7 presents all the cylinders along with their dimensions. Figure 8 shows the transmitter and receiver coils, referred to as EG&G coil [13] used in the continuous wave EMI measurements of test cylinders. The transmitter is a 60 cm X 100 cm rectangular coil consisting of 17 turns of # 22 AWG magnet wire.…”

Section: Cylinder Measurementsmentioning

confidence: 99%

Extremely low-frequency response (below 30 Hz) of UXO-like objects

Chilaka

Riggs

Nelson

et al. 2004

Detection and Remediation Technologies for Mines and Minelike Targets IX

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Extremely low frequency measurements, below 30 Hz, of solid, thin-, and, thick-walled steel (permeable) cylinders with length-to-diameter ratios of approximately 4 are described and compared with the predicted response computed using a frequency domain finite element method (FDFEM). Measurements were made using a conventional EMI test setup consisting of a Hewlett Packard 89410 vector signal analyzer, rectangular transmitting and a figure-eight (bucked) receiving coil, along with appropriate transmitter and receiver coil amplifiers. All cylinders were measured with the predominant component of the excitatory magnetic field both aligned with and orthogonal to (two distinct measurements) the cylinder's axis. Measurements were made with and without a centered copper ring on the cylinders. The ring simulates the so-called rotating bands on actual UXO. Not surprisingly, we observed that the quadrature peak of the response shifts down in frequency much more when the axis of the ringed cylinder is aligned with the excitatory magnetic filed than when perpendicular to it. Our measurements indicated that the real part of the response of the smallest cylinders measured asymptotically approaches its DC value around 1 Hz while the largest of the cylinders measured does not asymptote until well below 1 Hz. It appears that target information that may be crucial for discrimination purposes, especially for larger targets, exists at frequencies well below 30 Hz. Extremely low frequency measurements, especially with data averaging (stacking), can be a rather time consuming process, and therefore it is not likely that such measurements can be made from a moving platform. However, once an object of interest has been detected, the target can be reacquired and the measurement taken with the sensor stationary with respect to the target (sometimes referred to as a qued approach). As our measurements and simulations indicate, the qued method may be necessary if large solid UXO are to be distinguished from large thin-walled clutter objects.

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