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.

Simultaneous Measurement of In-Plane and Out-of-Plane Deformations Using Dual-Beam Spatial-Carrier Digital Speckle Pattern Interferometry

2015 ◽  
Vol 782 ◽  
pp. 316-325 ◽  
Author(s):  
Kai Liu ◽  
Si Jin Wu ◽  
Xin Ya Gao ◽  
Lian Xiang Yang
Keyword(s):  
High Speed ◽  
Phase Retrieval ◽  
Speckle Pattern ◽  
High Tech ◽  
Advanced Technique ◽  
Digital Speckle Pattern Interferometry ◽  
Dual Beam ◽  
Out Of Plane ◽  
Digital Speckle ◽  
Plane Deformations

Digital speckle pattern interferometry (DSPI) is an advanced technique for both in-plane and out-of-plane deformation measurements of diffuse surfaces in nanoscale. It has been widely used in aerospace engineering and other high-tech industries due to the advantages of non-contact, high-accuracy and full-field measurement. Traditionally, DSPI uses temporal phase shifting method to achieve precise deformation measurement, but it is only suitable for quasi-static deformation. Spatial-carrier method is another effective phase retrieval method used in DSPI and its validity has been verified in some DSPI setups. DSPI with spatial-carrier method enjoys the advantages of simple optical arrangement, easy operation, and above all, high-speed measurement of deformation. This paper introduces a dual-beam spatial-carrier digital speckle pattern interferometry system, with which in-plane and out-of-plane deformations can be measured simultaneously as well as quickly. In the optical setup, two lasers are employed to illuminate the measured object with different illumination angles, and two single-mode fibers server as carriers to transmit the reference beams. In-plane and out-of-plane deformations can be obtained by combining the phase maps of both channels. Theoretical discussion and experimental analysis are both presented.

Measurement of complex surface deformation by high-speed dynamic phase-stepped digital speckle pattern interferometry

2000 ◽  
Vol 25 (15) ◽  
pp. 1068 ◽  
Author(s):  
James M. Kilpatrick ◽  
Andrew J. Moore ◽  
James S. Barton ◽  
Julian D. C. Jones ◽  
Mark Reeves ◽  
...  
Keyword(s):  
High Speed ◽  
Surface Deformation ◽  
Speckle Pattern ◽  
Complex Surface ◽  
Digital Speckle Pattern Interferometry ◽  
Dynamic Phase ◽  
Digital Speckle

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.

Application of High Speed Image Correlation for Measurement of Mode Shapes of a Car Bonnet

2011 ◽  
Vol 70 ◽  
pp. 45-50
Author(s):  
Thorsten Siebert ◽  
Wei Zhuo Wang ◽  
John E. Mottershead ◽  
Andrea Pipino
Keyword(s):  
High Speed ◽  
Speckle Pattern ◽  
Measurement Techniques ◽  
Image Correlation ◽  
Mode Shapes ◽  
Analysis Tool ◽  
Full Field ◽  
Digital Speckle Pattern Interferometry ◽  
Full Field Measurement ◽  
Wide Range

For the analysis of vibrations and mode shape extraction in particular the use of optical full-field measurement techniques has grown during the last years. Beside techniques like Digital Speckle Pattern Interferometry, Moiré, Thermography or Photoelasticity the Digital Image Correlation techniques have already been successfully proven to be an accurate displacement analysis tool for a wide range of applications.

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
Sign in / Sign up

Export Citation Format

Share Document