Research on the sensitivity of projection moiré system considering its variety in space

2018 ◽  
Vol 110 ◽  
pp. 1-6 ◽  
Author(s):  
Jun Yao ◽  
Jubing Chen
Keyword(s):  
Projection Moire

Calibration of an arbitrarily arranged projection moiré system for 3D shape measurement

2018 ◽  
Vol 104 ◽  
pp. 135-140 ◽  
Author(s):  
Ying Tang ◽  
Jun Yao ◽  
Yihao Zhou ◽  
Chen Sun ◽  
Peng Yang ◽  
...  
Keyword(s):  
Shape Measurement ◽  
3D Shape ◽  
3D Shape Measurement ◽  
Projection Moire

Warpage measurement comparison using shadow Moire and projection Moire methods

2002 ◽  
Vol 25 (4) ◽  
pp. 714-721 ◽  
Author(s):  
Hai Ding ◽  
R.E. Powell ◽  
C.R. Hanna ◽  
I.C. Ume
Keyword(s):  
Shadow Moire ◽  
Shadow Moiré ◽  
Projection Moire

Interpretation of Fringes Produced by Time-Averaged Projection Moiré

Strain ◽  
2009 ◽  
Vol 47 ◽  
pp. e357-e370 ◽  
Author(s):  
M. Ragulskis ◽  
Z. Navickas
Keyword(s):  
Projection Moire

Determination of Optimum Values of Control Parameters to Reduce Laser Speckle Noise for Projection Moire´ System

2011 ◽  
Author(s):  
Sungbum Kang ◽  
Jie Gong ◽  
I. Charles Ume
Keyword(s):  
Regression Analysis ◽  
Measurement Error ◽  
Control Parameter ◽  
Noise Control ◽  
Laser Interferometry ◽  
Speckle Noise ◽  
Laser Speckle ◽  
Control Parameters ◽  
Plane Displacement ◽  
Projection Moire

Projection moire´ technique using laser interferometry to generate grating patterns is one of the major techniques for out-of-plane displacement or warpage measurement of electronic packaging devices. Laser speckle is one of the most crucial sources of noise that increase measurement error and decrease repeatability of projection moire´ systems. The aim of this work is to reduce the laser speckle noise by optimizing the noise control parameters (laser power, camera exposure and camera gain) to minimize the measurement error and maximize the repeatability of the projection moire´ system. Taguchi’s design experimental method is used to formulate the experimental layout, to investigate the effect of the each control parameter on the measurement error and repeatability, and to determine the best possible parameter levels. Regression analysis is employed to precisely find the optimum values of the each control parameter. The validation test shows that the approach using Taguchi method and regression analysis is well established to optimize the noise control parameters of the projection moire´ system.

A study on multispectral projection moire measurement

2005 ◽  
Author(s):  
Nanyang Zhang ◽  
KunTao Yang
Keyword(s):  
Projection Moire

A simple projection moiré system to measure displacements of aircraft structures

2007 ◽  
Vol 42 (6) ◽  
pp. 477-495 ◽  
Author(s):  
U Galietti ◽  
K Genovese ◽  
L Lamberti ◽  
D Posa
Keyword(s):  
Analytical Model ◽  
Large Scale ◽  
Industrial Applications ◽  
Processing Method ◽  
Simple Analytical Model ◽  
Aerodynamic Loads ◽  
Out Of Plane ◽  
Plane Displacement ◽  
Good Agreement ◽  
Projection Moire

This work presents a simple projection moiré system (PMS) to measure displacements of large-scale aeronautical components. The system includes standard optics, uses a standard fringe-processing method, and relies on a simple analytical model to recover topographic information. An extensive calibration campaign, based on design of experiments, is conducted in order to find the best analytical model for retrieving the out-of-plane displacement field from the moiré pattern and to find the optimal combination of parameters involved in the measurement system. In order to check the suitability of the present PMS device for practical industrial applications, distortions induced by aerodynamic loads on a landing-light glazing of an Airbus A340 are measured. Experimental results are in good agreement with other measurements carried out independently.

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