Multi-Sensor Systems Development for UXO Detection and Discrimination: Hand-Held Dual Magnetic/Electromagnetic Induction Sensor

摘要

The U.S. Army Engineer Research and Development Center (ERDC) in Vicksburg, MS, developed, tested, and demonstrated an innovative, hand-held, dual-sensor unexploded ordnance (UXO) detection and discrimination system. This breakthrough technology markedly reduces UXO false alarm rates by fusing two heretofore incompatible sensor platforms, integrating highly accurate spatial data in real time, and applying advanced modeling and analysis to the co- registered data stream. The ArcSecond laser positioning module simultaneously integrates coregistered magnetometry and electromagnetic induction (EMI) sensor data with latitude, longitude, and elevation data at the centimeter level. This enables a vast improvement in object detection and classification in the field under a wide variety of complex geological and environmental site conditions and at sites with multiple types of military munitions. Sensor co-registration further enables major advances in physics-based modeling capabilities and applications that are unique for magnetometry and EMI sensor response. Co- registered sensors permitted the application of cooperative and joint inversion techniques that simultaneously solve both the magnetic and EM inverse problem. This approach is considerably more efficient and elegant than inverting each measurement set individually and exclusively. This breakthrough will permit the UXO remediation community to detect and discriminate 90 percent of UXO under complex site conditions, and will lead to an enormous reduction in UXO cleanup costs nationwide.