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Proceedings Paper

Laser-induced acoustic imaging of underground objects
Author(s): Wen Li; Charles A. DiMarzio; Stephen W. McKnight; Gerhard O. Sauermann; Eric L. Miller
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Paper Abstract

This paper introduces a new demining technique based on the photo-acoustic interaction, together with results from photo- acoustic experiments. We have buried different types of targets (metal, rubber and plastic) in different media (sand, soil and water) and imaged them by measuring reflection of acoustic waves generated by irradiation with a CO2 laser. Research has been focused on the signal acquisition and signal processing. A deconvolution method using Wiener filters is utilized in data processing. Using a uniform spatial distribution of laser pulses at the ground's surface, we obtained 3D images of buried objects. The images give us a clear representation of the shapes of the underground objects. The quality of the images depends on the mismatch of acoustic impedance of the buried objects, the bandwidth and center frequency of the acoustic sensors and the selection of filter functions.

Paper Details

Date Published: 10 February 1999
PDF: 9 pages
Proc. SPIE 3534, Environmental Monitoring and Remediation Technologies, (10 February 1999); doi: 10.1117/12.339011
Show Author Affiliations
Wen Li, Northeastern Univ. (United States)
Charles A. DiMarzio, Northeastern Univ. (United States)
Stephen W. McKnight, Northeastern Univ. (United States)
Gerhard O. Sauermann, Northeastern Univ. (United States)
Eric L. Miller, Northeastern Univ. (United States)

Published in SPIE Proceedings Vol. 3534:
Environmental Monitoring and Remediation Technologies
Tuan Vo-Dinh; Robert L. Spellicy, Editor(s)

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