Fast Forward Modeling of EMI Responses from Subsurface Metallic Objects and Ambient Environments
Abstract
This project focused on fast numerical modeling of ultra-wideband (UWB) electromagnetic induction (EMI) sensing of buried unexploded ordnances (UXO'S). Modeling of the "targets" (or representative clutter objects), the soil environment, and the two in combination were treated. Two example sensors were modeled specifically, one working in the frequency domain (FD), the other in the time domain (TD). The models of UXO response were extremely high fidelity, using the standardized excitations approach (SEA). This includes all effects, and all internal interactions. At the same time, the models are fast enough to use in essentially real time modeling of contemplated scenarios in which prospective signal patterns are sought over plots of ground on the order of typical survey segments. Models of the ground response include ultra-fast code that evaluate analytical solutions for responses of magnetically permeable and conductive environments to the subject instruments, with algorithms for generalization to other instruments.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 23, 2006
- Accession Number
- ADA482606
Entities
People
- Keith Paulsen
Organizations
- Dartmouth College