Submicron Surface Vibration Profiling Using Doppler Self-Mixing Techniques
Joint Authors
Sequeira, Mariana
Pereira, Tânia
Correia, Carlos
Tomé, Ana
Cardoso, João
Pereira, Helena C.
Vaz, Pedro
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-07-22
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
Doppler self-mixing laser probing techniques are often used for vibration measurement with very high accuracy.
A novel optoelectronic probe solution is proposed, based on off-the-shelf components, with a direct reflection optical scheme for contactless characterization of the target’s movement.
This probe was tested with two test bench apparatus that enhance its precision performance, with a linear actuator at low frequency (35 µm, 5–60 Hz), and its dynamics, with disc shaped transducers for small amplitude and high frequency (0.6 µm, 100–2500 Hz).
The results, obtained from well-established signal processing methods for self-mixing Doppler signals, allowed the evaluation of vibration velocity and amplitudes with an average error of less than 10%.
The impedance spectrum of piezoelectric (PZ) disc target revealed a maximum of impedance (around 1 kHz) for minimal Doppler shift.
A bidimensional scan over the PZ disc surface allowed the categorization of the vibration mode (0, 1) and explained its deflection directions.
The feasibility of a laser vibrometer based on self-mixing principles and supported by tailored electronics able to accurately measure submicron displacements was, thus, successfully demonstrated.
American Psychological Association (APA)
Pereira, Tânia& Sequeira, Mariana& Vaz, Pedro& Tomé, Ana& Pereira, Helena C.& Correia, Carlos…[et al.]. 2014. Submicron Surface Vibration Profiling Using Doppler Self-Mixing Techniques. Advances in Optics،Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-482109
Modern Language Association (MLA)
Pereira, Tânia…[et al.]. Submicron Surface Vibration Profiling Using Doppler Self-Mixing Techniques. Advances in Optics No. 2014 (2014), pp.1-7.
https://search.emarefa.net/detail/BIM-482109
American Medical Association (AMA)
Pereira, Tânia& Sequeira, Mariana& Vaz, Pedro& Tomé, Ana& Pereira, Helena C.& Correia, Carlos…[et al.]. Submicron Surface Vibration Profiling Using Doppler Self-Mixing Techniques. Advances in Optics. 2014. Vol. 2014, no. 2014, pp.1-7.
https://search.emarefa.net/detail/BIM-482109
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-482109