Finite element modeling and long-wave infrared imaging for detection and identification of buried objects
Tilley, Heather P.
MetadataShow full item record
Detection of buried improvised explosive devices (IED) represents a complex threat to U.S. forces. This thesis explores the potential use of infrared images combined with finite element models to detect buried objects in soil. Initially, computer simulations using COMSOL Multiphysics software implemented a range of heat transfer dynamics to assess the feasibility of this approach. Then, an experimental setup was constructed to measure the surface temperature profile of a sandbox containing buried objects using a long-wave infrared camera. Images were recorded for several days under ambient conditions to determine detection capability for various attributes describing the buried object (shape, size, material and depth) and correlation to time of day. Best detection of buried objects corresponded to shallow depths for observed intervals where maxima/minima ambient temperatures coincided with expected diurnal cycling effects. Thermal contrast in the sand surrounding the buried object was not distinguishable at depths greater than eight cm. Utilizing a technique that extracted a surface intensity profile and fitted against simulated data for various soft metals (thermal conductivities and densities) indicated the potential ability to estimate a buried object's material composition. The preliminary results of the research indicate that infrared imaging could be used for passive detection of shallowly buried objects.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Rabelo, Renato C.; Tilley, Heather P.; Catterlin, Jeffrey K.; Karunasiri, Gamani; Alves, Fabio D. P. (SPIE, 2018);A buried-object detection system composed of a LWIR, a MWIR and a SWIR camera, along with a set of ground and ambient temperature sensors was constructed and tested. The objects were buried in a 1.2x1x0.3 m³ sandbox and ...
Hall, Patrick W. (Monterey, California. Naval Postgraduate School, 1998-12-01);This thesis describes the results of field experiments in which seismo-acoustic interface (Rayleigh) waves were employed to detect and measure the target strength of mine-like test objects buried in the near-surf zone. ...
Chu, Peter C.; Cornelius, M.; Wegstaff, M. (2005);Sidescan sonar detects objects buried in the seafloor through generating images of ordnance such as seamine buried in sediments. The sonar operates by illuminating a broad swath of seabed using a line array of acoustic ...