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Laser Doppler Vibrometers (LDVs) have been widely applied for detecting vibrations in applications such as mechanics, bridge inspection, biometrics, as well as long-range surveillance in which acoustic signatures can be obtained at a large distance. However, in both industrial and scientific applications, the LDVs are manually controlled in surface selection, laser focusing, and acoustic acquisition...
To improve the performance and the efficiency of Laser Doppler Vibrometers (LDVs) for long-range hearing, we design an active multimodal sensing platform that integrates a Pan-Tilt-Zoom (PTZ) camera, a mirror and a Pan-Tilt-Unit (PTU) to the LDV. With the assistance of the vision and active control components, the LDV can automatically select the best reflective surfaces, point the laser beam to the...
To address the challenges of noncooperative, large-distance human signature detection, we present a novel multimodal remote audio/video acquisition system. The system mainly consists of a laser Doppler virbometer (LDV) and a pan-tilt-zoom (PTZ) camera. The LDV is a unique remote hearing sensor that uses the principle of laser interferometry. However, it needs an appropriate surface to modulate the...
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