Title :
Non-contact 2D speckle vibrometer
Author :
Scalise, L. ; Di Donato, A.
Author_Institution :
Dipt. di Meccanica, Universita Politecnica delle Marche, Ancona, Italy
Abstract :
In this paper, the authors present a non-contact 2D speckle vibrometer, which is based on an improved image processing algorithm and realized by a compact and low-cost setup. Starting from the results obtained in a previous paper (Di Donato et al. (2004)), where we demonstrated the feasibility of a method for speckle processing in the assessment velocity along one direction, we extend the study to a 2D sensor by overcoming the limits encountered previously, such as the bandwidth of the sensor and the image processing algorithm. The dynamical sensor performance is defined comparing the results with a laser Doppler vibrometer (LDVi). In addition the configuration is further simplified by introducing a low coherence source and a simpler electronic circuit.
Keywords :
Doppler measurement; displacement measurement; image processing; laser velocimeters; optical sensors; speckle; velocity measurement; vibration measurement; 2D sensor; dynamical sensor performance; electronic circuit; image processing algorithm; low coherence source; noncontact 2D speckle vibrometer; speckle processing; Charge coupled devices; Laser noise; Optical sensors; Optical surface waves; Rough surfaces; Semiconductor lasers; Speckle; Surface emitting lasers; Surface roughness; Vibrometers;
Conference_Titel :
Sensors, 2004. Proceedings of IEEE
Print_ISBN :
0-7803-8692-2
DOI :
10.1109/ICSENS.2004.1426485
