Target recognition by vibration frequency analysis: a comparison of laser vibrometry and acoustic methods

Dietmar Letalick; Tomas Carlsson; Hans Habberstad; Makus Henriksson

doi:10.1117/12.488508

21 August 2003 Target recognition by vibration frequency analysis: a comparison of laser vibrometry and acoustic methods

Dietmar Letalick, Tomas Carlsson, Hans Habberstad, Makus Henriksson

Author Affiliations +

Proceedings Volume 5086, Laser Radar Technology and Applications VIII; (2003) https://doi.org/10.1117/12.488508
Event: AeroSense 2003, 2003, Orlando, Florida, United States

Abstract

Target recognition is an important issue on the military battlefield. Vibration signatures are robust and independent on target orientation. Hence, they are interesting to use for classification and identification of targets. Various sensors can be used to measure signatures induced by target vibrations, such as laser vibrometry and acoustic sensors. The output from both sensors can be presented as a frequency spectrum that represents the target vibrations. A field trial was conducted where some military targets were investigated. Simultaneous data were taken with two sensors: i) a laser vibrometry system consisting of a 1.55 μm eye-safe coherent laser radar; and ii) an acoustic data logging system with Bruel & Kjaer free field microphone and amplifier as the sensor part. The range to the targets was between 25 and 100 meters. Results from the field trial are reported and a comparison of the data from the sensors is presented.

Citation Download Citation

Dietmar Letalick, Tomas Carlsson, Hans Habberstad, and Makus Henriksson "Target recognition by vibration frequency analysis: a comparison of laser vibrometry and acoustic methods", Proc. SPIE 5086, Laser Radar Technology and Applications VIII, (21 August 2003); https://doi.org/10.1117/12.488508

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