Evaluation of seismic noise for landmine detection system development

James S. Martin; Gregg D. Larson; Waymond R. Scott Jr.; George S. McCall II

doi:10.1117/12.487900

11 September 2003 Evaluation of seismic noise for landmine detection system development

James S. Martin, Gregg D. Larson, Waymond R. Scott Jr., George S. McCall II

Proceedings Volume 5089, Detection and Remediation Technologies for Mines and Minelike Targets VIII; (2003) https://doi.org/10.1117/12.487900
Event: AeroSense 2003, 2003, Orlando, Florida, United States

Abstract

For several years a system has been under development at Georgia Tech that uses seismic surface waves to detect and image buried landmines. The details of this system have been previously reported in the literature. Current work involves the transition from a laboratory experimental system to a field-operable experimental system with the ultimate goal of creating an integrated field-operable prototype. Several issues have arisen in the transition to field testing. One of these is the nature and magnitude of the noise levels that limit system performance at field sites and the relevance of these for predicting noise that might be encountered in a realistic demining scenario. Noise introduced to the system sensor (a radar-based, non-contact displacement sensor) can arise from many sources (both natural and manmade). It may be received through a variety of mechanisms in addition to the sensor's primary transduction mechanism. Moreover, even noise which is received through the primary transduction mechanism need not involve purely seismic motion of the ground that is being interrogated. It might instead represent motion of the sensor's support structure or the purely local coupling of airborne noise into surface motion. To understand these effects, measurements have been made using ground contacting sensors at four field sites where other system-related measurements have also been made. The nature of the noise measurements has required that refinements be made to both the sensors themselves (triaxial geophones) and to the data acquisition system used for the measurement of the system’s seismic interrogation signals (a 12-bit, PC-based digitizer).

Citation Download Citation

James S. Martin, Gregg D. Larson, Waymond R. Scott Jr., and George S. McCall II "Evaluation of seismic noise for landmine detection system development", Proc. SPIE 5089, Detection and Remediation Technologies for Mines and Minelike Targets VIII, (11 September 2003); https://doi.org/10.1117/12.487900

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