Volume-grating speckle interferometry used for measurement of large shearing out-of-plane displacement field

2001 ◽  
Author(s):  
Enbang Li ◽  
Kaifu Wang ◽  
A. K. Tieu
Keyword(s):  
Displacement Field ◽  
Speckle Interferometry ◽  
Out Of Plane ◽  
Plane Displacement

Dynamical measurement of out-of-plane displacement field and strain field inside resin composite

2014 ◽  
Vol 22 (12) ◽  
pp. 3217-3223
Author(s):  
周延周 ZHOU Yan-zhou ◽  
朱文卓 ZHU Wen-zhuo ◽  
董博 DONG Bo ◽  
白玉磊 BAI Yu-lei ◽  
彭义 PENG Yi
Keyword(s):  
Displacement Field ◽  
Strain Field ◽  
Resin Composite ◽  
Out Of Plane ◽  
Plane Displacement ◽  
Dynamical Measurement

A Study of the Deformation Measurement of 3D Displacement Field

2005 ◽  
Vol 295-296 ◽  
pp. 313-318
Author(s):  
S.R. Lee ◽  
Z.S. Luo ◽  
H.S. Chiou ◽  
B.G. Wang ◽  
L.S. Liu
Keyword(s):  
Displacement Field ◽  
Incident Angle ◽  
Vertical Direction ◽  
Moiré Interferometry ◽  
Deformation Measurement ◽  
Measuring Error ◽  
Moire Interferometry ◽  
First Order ◽  
Out Of Plane ◽  
Plane Displacement

With the development of modern engineering such as micro-electro-mechanical system (MEMS) and new material, the deformation measurement of 3D displacement field is required. Moiré interferometry has become common for measuring the deformations of two-dimension in-plane displacement field. To solve the problem of 3D displacement field, a system for measuring the deformations of 3D displacement field is designed. By using this system, we can measure the out-of-plane displacement by appending a set of electronic speckle interference system based on Moiré interferometry system. Adjusting the incident angle of the incident light, the transmitting direction of the first order diffracted wave in a Moiré interferometry system is assigned to deviate with a small angle from the vertical direction of the specimen surface. Thus the first order diffracted wave is separated from the place of the appended interference field. The striated patterns of the deformations of 3D displacement field can be obtained at the same time. These striated patterns are recorded respectively by three CCD cameras and are stored and processed by a computer. The synchronous measuring method brings certain amount of measuring errors into the measurement of in-plane displacement. This measuring error is analyzed in theory. When real-time measurement is not required, this system can be changed into another system in which the in-plane and the out-of-plane displacement field are measured by time sharing to reduce the measuring errors. The theoretical derivation and a part of experimental results for verification are presented.

Out-of-plane displacement field measurement by shearography

2015 ◽  
Vol 73 ◽  
pp. 29-38 ◽  
Author(s):  
Pengxiang Bai ◽  
Feipeng Zhu ◽  
Xiaoyuan He
Keyword(s):  
Displacement Field ◽  
Field Measurement ◽  
Out Of Plane ◽  
Plane Displacement

scholarly journals Sensor Integrated Load-Bearing Structures: Measuring Axis Extension with DIC-Based Transducers

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4104
Author(s):  
Nassr Al-Baradoni ◽  
Peter Groche
Keyword(s):  
Cost Effective ◽  
Image Correlation ◽  
Maximum Deviation ◽  
Single Image ◽  
Eccentric Load ◽  
Load Bearing ◽  
Out Of Plane ◽  
Axis Extension ◽  
Plane Displacement ◽  
Imaging Sensor

In this paper we present a novel, cost-effective camera-based multi-axis force/torque sensor concept for integration into metallic load-bearing structures. A two-part pattern consisting of a directly incident and mirrored light beam is projected onto the imaging sensor surface. This allows the capturing of 3D displacements, occurring due to structure deformation under load in a single image. The displacement of defined features in size and position can be accurately analyzed and determined through digital image correlation (DIC). Validation on a prototype shows good accuracy of the measurement and a unique identification of all in- and out-of-plane displacement components under multiaxial load. Measurements show a maximum deviation related to the maximum measured values between 2.5% and 4.8% for uniaxial loads ( and between 2.5% and 10.43% for combined bending, torsion and axial load. In the course of the investigations, the measurement inaccuracy was partly attributed to the joint used between the sensor parts and the structure as well as to eccentric load.

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