BibliotecaPortal de investigación
es | en | GAL
  • Inicio
  • Contact us
  • Give feedback
  • Help
    • About Investigo
    • Search and Find
    • Submit
    • Intellectual Property
    • Open Access Policy
  • Links
    • Sherpa / Romeo
    • Dulcinea
    • OpenDOAR
    • Dialnet Plus
    • ORCID
    • Creative Commons
    • UNESCO Nomenclature
    • español
    • English
    • Gallegan
JavaScript is disabled for your browser. Some features of this site may not work without it.
All of InvestigoAuthorsTitles Materias Unesco Research GroupsType of ContentsJournal TitlesThis CollectionAuthorsTitlesUNESCO SubjectsResearch GroupsType of ContentsJournal Titles

Depositar

Guía de autoarchivo (en construcción)Solicitar permiso a una editorial

Statistics

View Usage Statistics

Measuring amplitude and phase of vibration with double-exposure stroboscopic TV holography

Fernández Doval, Ángel ManuelAutor UVIGO; Trillo Yáñez, María CristinaAutor UVIGO; Cernadas Fraga, Daniel CarlosAutor UVIGO; Vázquez Dorrío, José BenitoAutor UVIGO; López Vázquez, José CarlosAutor UVIGO; Fernández Fernández, José LuisAutor UVIGO; Perez-Martinez Perez-Amor, Mariano JesusAutor UVIGO
Date: 2000
UNIVERSAL IDENTIFIER: http://hdl.handle.net/11093/1277
EDITED VERSION: http://link.springer.com/10.1007/978-3-642-57323-1_35
UNESCO SUBJECT: 3311.11 Instrumentos Opticos ; 2209.07 Holografía ; 2201.11 Vibraciones
DOCUMENT TYPE: conferenceObject

Abstract

We present a technique for the measurement of both amplitude and phase of sinusoidal vibrations that uses double-exposure stroboscopic TV holography (TVH) with optical and mechanical phase-stepping. This method results of the assembling of two techniques previously contrived by the authors. The first one allows to shift the phase of the fringes generated by sequential subtraction in double-exposure stroboscopic TVH and thus to obtain phase maps representing the local difference of displacement experienced by the object between two instants within its vibration period. The second one yields the amplitude and the phase of vibration from two of such phase maps obtained with a relative mechanical-phase-shift of pi/2 between them and conveniently unwrapped. In this communication we describe how both techniques are combined and demonstrate the use of pulse separation to control the overall sensitivity. The implementation of the resulting technique in a fibre-optic electronic speckle-pattern interferometer (ESPI) and examples of its application to simple and more complex vibrating objects is also presented. The measurement of the amplitude and the phase of vibration allows the total determination of the dynamic displacement of sinusoidally vibrating objects. With double-exposure stroboscopic TVH, measurements can be made "in flight'' (i.e., there is no need of recording a reference state with the object at rest) with less sensitivity to environmental noise and more efficient use of the available laser power than with single-exposure techniques. These features make of this technique a promising tool for the industrial measurement of vibrations.
Show full item record

Files in this item

[PDF]
Name:
doval-Speckle00.pdf
Size:
1.193Mb
Format:
PDF
View/Open

El Repositorio Institucional de la Universidade de Vigo Investigo se difunden en:

INFORMACIÓN
+34 986 913 921
investigo@uvigo.es

Accesibilidad | Aviso legal | Protección de datos
Logo UVigo

INFORMACIÓN
+34 986 812 000
informacion@uvigo.es

CONTACTO

CAMPUS DO MAR

CAMPUS DE OURENSE
+34 988 387 102
Campus da Auga

CAIXA DE QUEIXAS, SUXESTIÓNS E PARABÉNS

TRANSPARENCIA

CAMPUS DE PONTEVEDRA
+34 986 801 949
Campus CREA

OUTRAS WEBS INSTITUCIONAIS

EMERXENCIAS

CAMPUS DE VIGO
+34 986 812 000
Campus Vigo Tecnolóxico

MURO SOCIAL