Non-contact 2D speckle vibrometer

Author

Scalise, L. ; Di Donato, A.

Author_Institution

Dipt. di Meccanica, Universita Politecnica delle Marche, Ancona, Italy

fYear

2004

fDate

24-27 Oct. 2004

Firstpage

1550

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2004. Proceedings of IEEE

Print_ISBN

0-7803-8692-2

Type

conf

DOI

10.1109/ICSENS.2004.1426485

Filename

1426485