Electromagnetic Crack Detection Inverse Problems Using Terahertz Interrogating Signals
Abstract
We apply an inverse problem formulation to determine characteristics of a defect from a perturbed electromagnetic interrogating signal. A defect (crack) inside of a dielectric material causes a disruption, from reflections and refractions off of the interfaces, of the windowed interrogating signal. We model the electromagnetic waves inside the material with Maxwell's equations. Using simulations as forward solves, our Newton-based, iterative optimization scheme resolves the dimensions and location of the defect. Numerical results are given in tables and plots, standard errors are calculated, and computational issues are addressed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2003
- Accession Number
- ADA446719
Entities
People
- H. Thomas Banks
- Nathan L. Gibson
- William P. Winfree
Organizations
- North Carolina State University