Digital speckle-pattern interferometry as a full-field fluid-velocimetry technique

1999 ◽  
Vol 24 (9) ◽  
pp. 575 ◽  
Author(s):  
Nieves Andrés ◽  
M. Pilar Arroyo ◽  
Heiko Hinrichs ◽  
Manuel Quintanilla
Keyword(s):  
Speckle Pattern ◽  
Full Field ◽  
Digital Speckle Pattern Interferometry ◽  
Digital Speckle

Study on Displacement Measurement for Induced Strain Field Based on Digital Speckle Pattern Interferometry Method

2013 ◽  
Vol 273 ◽  
pp. 510-514
Author(s):  
Jing Liu ◽  
Hui Zhang ◽  
Jun Li ◽  
Da Chuan Chen ◽  
Yan Kun Tang
Keyword(s):  
Strain Field ◽  
High Speed ◽  
Speckle Pattern ◽  
Measuring Method ◽  
Full Field ◽  
Digital Speckle Pattern Interferometry ◽  
Level Measurement ◽  
On Line ◽  
Interferometry Method ◽  
Digital Speckle

Digital Speckle Pattern Interferometry ( DSPI for short ) method has become one of the most practical worthy techniques for speckle measuring methods with the high-speed development of optic-electronical technique, image processing technology and electronic computer technology. There is a lot of advantages about it, such as uncomplicated operation, non-contacting, advanced automatic level, measurement on-line and extensive using. In this thesis, the displacement variation of the induced strain field for driving by piezoelectric ceramics can be measured by using this method. Thus we can come to a conclusion that digital speckle pattern interferometry is a new measuring method for extracting small-signal. It also provides a powerfully theoretical and experimental platform for study of automated, full-field, high-precision and nondestructive measurement.

Synchronous Measurement of Three-Dimensional Deformations Using Tri-Channel Spatial-Carrier Digital Speckle Pattern Interferometry

2017 ◽  
Vol 868 ◽  
pp. 316-322 ◽  
Author(s):  
Yao Fang ◽  
Si Jin Wu ◽  
Lian Xiang Yang
Keyword(s):  
Speckle Pattern ◽  
Three Dimensional ◽  
Deformation Measurement ◽  
Phase Shifting ◽  
Full Field ◽  
Digital Speckle Pattern Interferometry ◽  
Rapid Measurement ◽  
Optical Arrangement ◽  
Digital Speckle ◽  
Synchronous Measurement

Spatial-carrier digital speckle pattern interferometry (SC-DSPI) has proven to be a competitive tool for full-field deformation measurement. Comparing with traditional phase-shifting digital speckle pattern interferometry, SC-DSPI has the advantage of rapid measurement which guarantees that dynamic deformations can be precisely measured. In this article, a tri-channel SC-DSPI that measures three-dimensional deformations synchronously is introduced. Measuring algorithm as well as optical arrangement is described in detail. Experiments are carried out to verify the validity and evaluate the performance of the proposed technique.

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