Real-time shadow moire vibration measurement: method featuring simple setup, high sensitivity, and exact calibration

1986 ◽  
Vol 25 (20) ◽  
pp. 3785 ◽  
Author(s):  
J. J. J. Dirckx ◽  
W. F. Decraemer ◽  
J. L. Janssens
Keyword(s):  
Real Time ◽  
Measurement Method ◽  
High Sensitivity ◽  
Vibration Measurement ◽  
Shadow Moire ◽  
Shadow Moiré

Low-Frequency Vibration Measurement Based on Spatiotemporal Analysis of Shadow Moiré

2011 ◽  
Vol 31 (4) ◽  
pp. 0412005
Author(s):  
史红健 Shi Hongjian ◽  
朱飞鹏 Zhu Feipeng ◽  
何小元 He Xiaoyuan
Keyword(s):  
Low Frequency ◽  
Spatiotemporal Analysis ◽  
Vibration Measurement ◽  
Shadow Moire ◽  
Shadow Moiré ◽  
Low Frequency Vibration

Real-Time Calibration Technique for Phase Shift Shadow Moiré

2017 ◽  
Vol 54 (9) ◽  
pp. 091202
Author(s):  
颜菁菁 Yan Jingjing ◽  
杜虎兵 Du Hubing
Keyword(s):  
Phase Shift ◽  
Real Time ◽  
Calibration Technique ◽  
Shadow Moire ◽  
Shadow Moiré ◽  
Time Calibration

Topographical Evaluation of Subsea Defects in Offshore Structures Using a Shadow Moire´ Technique

1994 ◽  
Vol 116 (2) ◽  
pp. 114-116
Author(s):  
P. M. MacKenzie ◽  
C. A. Walker
Keyword(s):  
Real Time ◽  
Detailed Examination ◽  
Offshore Structures ◽  
Optical Techniques ◽  
Shadow Moire ◽  
Shadow Moiré ◽  
Corrosion Pitting ◽  
Surface Profiles ◽  
Moire Method

Optical techniques based on the moire´ phenomenon are powerful tools with applications over a range of engineering inspection/measurement problems. A study of the application of the shadow moire´ method in connection with detailed examination of replicas taken from damaged subsea zones of offshore structures has been performed. Measurements of the surface profiles of areas altered by processes such as corrosion pitting, and remedial grinding of cracks, were obtained using the technique. This method offers a convenient “real-time” approach to visualizing height contours.

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