Modeling of electromagnetic and seismic/acoustic signatures

Susanne M. Miller; Douglas R. Baumgardt; Alan G. Bell; Robert F. Gray

doi:10.1117/12.280652

24 July 1997 Modeling of electromagnetic and seismic/acoustic signatures

Susanne M. Miller, Douglas R. Baumgardt, Alan G. Bell, Robert F. Gray

Proceedings Volume 3081, Peace and Wartime Applications and Technical Issues for Unattended Ground Sensors; (1997) https://doi.org/10.1117/12.280652
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

The effectiveness of sensors to identify, locate and characterize a facility depends on several factors, namely, the types of equipment being monitored, the location of the equipment, the mounting of the equipment to the structure, the physical configuration of the facility, the surrounding propagating media, and the effects of natural and cultural background noise. We have developed electromagnetic, seismic, and acoustic source and propagation models to theoretically investigate these issues for facility models in realistic geological media. Source models for various machine types have been developed along with an electromechanical system parameter database. The model produces expected time-varying currents on the power lines which generate electromagnetic fields observed by EM sensors. The time-varying torque function defined in the model gives the expected force time function for the seismic and acoustic source. Propagation models have been developed, using 2D seismic, acoustic and electromagnetic finite- difference techniques, for propagating the fields through the structure and earth medium to far-field sensors. In this research, we are also investigating methods for fusing EM and seismic/acoustic signatures for more complete characterization of the operational elements in a facility. The products of the effort are enhanced key components of a forward modeling system incorporating a CAD-style interface for specifying facility models, equipment locations and surrounding media. We envision the system as a tool to estimate detection ranges and optimal sensor placement for monitoring a facility.

Citation Download Citation

Susanne M. Miller, Douglas R. Baumgardt, Alan G. Bell, and Robert F. Gray "Modeling of electromagnetic and seismic/acoustic signatures", Proc. SPIE 3081, Peace and Wartime Applications and Technical Issues for Unattended Ground Sensors, (24 July 1997); https://doi.org/10.1117/12.280652

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available