Computer Vision & Laser Vibrometry, Vol. 6

Front Cover	1
Conference Proceedings of the Society for Experimental Mechanics Series	2
Preface	6
Contents	8
Spatiotemporally-resolved Kinematic and Stress Measurements of Interfacial Cavitation in Soft Matter via DIC	10
Introduction	11
Materials and Methods	11
Material preparation	11
Laser-induced inertial microcavitation	12
SpatioTemporally Adaptive mesh Digital Image Correlation (STAQ-DIC) analysis	13
Results and Analysis	13
Captured bubble dynamics using ultra-high-speed imaging	13
Experimentally measured kymographs of hyperelastic von Mises strain and stress generated by each laser-induced inertial cavitation event	14
Cumulative Material Damage from Repeated Laser Pulses	16
Conclusion	20
Continuous Scanning LDV: Comparison among different Vibrometer configuration and technologies	22
Introduction	22
Material and Methods	23
The experimental set up	23
ODS reconstruction from CLSDV data	25
QTec technology	25
Results	26
Conclusion	29
A Wirelessly Time-Synchronized Vision-Based System Network for Non-Contact Structural Health Monitoring	32
Introduction	32
Flexible Vision Network (FVN)	33
Hardware of an FVN node	33
Internal clock updating of FVN nodes	33
Image processing of FVN nodes	34
Verification On Time Synchronisation Accuracy	34
Applications Of FVN	35
3D displacement measurement of a cross-sea bridge	35
3D modal test of a suspension bridge	37
Conclusion	38
Safeguarding Masterpieces: Multi-point Vibrometry (MPV) Based Monitoring of Georgia O'Keeffe's Art	40
Background On Paintings Tested	40
History and structural characteristics of the paintings	41
Multi-Point Vibrometer (MPV) Components And Process Flow	42
Measurement Results And Analysis	44
Conclusion	45
Expanding Single Frequency Excitations to Piecewise Bandwidth Excitations for Low Speed Cameras Vision-based vibration Measurements	52
Introduction	52
Background	53
Numerical Validation	53
Experimental Validation	54
Conclusion	57
LiDAR-based Semi-Autonomous Inspection of a Coal Mine Tailing Impoundment Emergency Spillway	58
Introduction	59
Matrice 350 RTK and L1 Zenmuse	59
The open channel emergency spillway	60
Mission Planning	60
Results	61
Three-dimensional model reconstruction of the spillway	61
Point cloud registration	61
Implementing the C2C algorithm	63
Conclusions	64
DIC Test Planning with Blender – A Focus on Lighting	66
Introduction	66
Blender Overview	67
Blender'S Camera Model	67
Lighting In Blender	68
Application to a Dic Experiment of a Rotor Blade	71
Conclusion	73
Mitigating Speckle Noise while Preserving Impact Response in Vibration Measurements with Laser Doppler Vibrometer on a Moving Platform	76
Introduction	76
Background	77
Methodology	78
Validation Case 1	80
Validation Case 2	81
Conclusion	83
Neural Radiance Fields for Low-cost, High-resolution 3D Scanning of Critical Infrastructures	86
Introduction	86
3d Reconstruction Techniques	87
Lidar	87
Photogrammetry	87
NeRF	88
Performance Metrics	90
Cloud to Cloud Comparison	90
Level of Accuracy (LOA)	90
Objects of Study	90
The USP Footbridge	90
The Cable-stayed Octavio Frias Bridge	90
Experiments	91
Results	92
The USP Footbridge	92
The Cable-stayed Octavio Frias Bridge	94
Conclusion	96
Turkiye Earthquake to Maui Wildfire: Generalizability of Aerial Rapid Post-Hazard Assessment Tools	98
Introduction	98
Methodology	99
Satellite Imagery and Channel Augmentation	99
Deep Learning Mechanisms	101
Results and Discussion	103
Conclusions	104
Analyzing Rotating Bladed Disk Dynamics with Digital Image Correlation and Downsampling	106
Introduction	106
Measurement Methodology	107
Stereo-Digital Image Correlation	107
Single Parameter Technique (SPT)	108
Test Rig	108
Results	109
Conclusion	111
Experimental Modal Analysis of a Twin-disc Tribometer using a 3D-scanning Laser Doppler Vibrometer	112
Introduction	112
Methodology	114
Measurement Setup	115
Results	116
Conclusion	118
A Neuromorphic, Event-Based, Two-Color Pyrometry for In-process Monitoring of Temperature Change in Welding and Additive Manufacturing	120
Introduction	120
Background	121
Analysis	122
Experimental Setup	122
Experimental Results	123
Simulation	125
Future Experimental Setup	126
Conclusion	129
Operational Modal Analysis of a Rotating Structure Using a Novel Image-Based Long-Range Continuously Scanning Laser Doppler Vibrometer	132
Introduction	132
Methodologies	133
Experiment and Results	135
Conclusion	141
Development and Validation of a Novel Miniaturized High-Precision Laser Vibrometer for Vibration and Ultrasonic Vibration Measurements	144
Introduction	144
Working Principles Used in This Work	145
Experimental Validation	148
Conclusion	151
Capture of Thin Film Vibromorphology using Laser Vibrometry and Frequency-Domain Viscoelastic Vibroacoustics	154
Introduction	155
Research Objectives	155
Research Background	155
Mathematical Description	155
Multi-Body Potential	156
Inter-Body Potential	156
Intra-Body Potential	157
Stationarity	157
Methods	157
Experimental Procedure	157
Fixture Design	158
Digital Image Correlation (DIC)	159
FEA Model	161
Optimization	161
Case Study 1: Nonconvex Problem	161
Case Study 2: Convex Problem	162
Results	164
DIC	165
FEA Model	166
Optimization	167
Discussion	167
DIC	168
FEA Model	168
Optimization	169
Conclusion	169
Evaluation of Camera-Denoising Techniques towards Force Reconstruction	172
Introduction	172
Background	173
Analytical Plate	175
Experimental Beam	178
Conclusion	181

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