Low-frame-rate single camera system for 3D full-field high-frequency vibration measurements

2019 ◽  
Vol 123 ◽  
pp. 143-152 ◽  
Author(s):  
Sandro Barone ◽  
Paolo Neri ◽  
Alessandro Paoli ◽  
Armando Viviano Razionale
Keyword(s):  
High Frequency ◽  
Frame Rate ◽  
Single Camera ◽  
Camera System ◽  
Vibration Measurements ◽  
Full Field ◽  
High Frequency Vibration ◽  
Low Frame Rate

scholarly journals 3D vibration measurements by a virtual-stereo-camera system based on a single low frame rate camera

2018 ◽  
Vol 12 ◽  
pp. 122-129 ◽  
Author(s):  
Sandro Barone ◽  
Paolo Neri ◽  
Alessandro Paoli ◽  
Armando Viviano Razionale
Keyword(s):  
Frame Rate ◽  
Camera System ◽  
Vibration Measurements ◽  
Stereo Camera ◽  
Low Frame Rate

Low-coherence fibre heterodyne interferometer for both dc and high-frequency vibration measurements in the inner ear

1998 ◽  
Vol 45 (4) ◽  
pp. 765-775 ◽  
Author(s):  
Ernst Dalhoff ◽  
Ralf Gärtner ◽  
Ulrich Hofbauer ◽  
Hans Tiziani ◽  
Hans-Peter Zenner ◽  
...  
Keyword(s):  
Inner Ear ◽  
High Frequency ◽  
Vibration Measurements ◽  
Heterodyne Interferometer ◽  
High Frequency Vibration ◽  
Low Coherence

scholarly journals Reconstructing the flight kinematics of swarming and mating in wild mosquitoes

2012 ◽  
Vol 9 (75) ◽  
pp. 2624-2638 ◽  
Author(s):  
Sachit Butail ◽  
Nicholas Manoukis ◽  
Moussa Diallo ◽  
José M. Ribeiro ◽  
Tovi Lehmann ◽  
...  
Keyword(s):  
Likelihood Function ◽  
Average Length ◽  
Tracking System ◽  
Three Dimensional ◽  
Frame Rate ◽  
Video Streams ◽  
Camera System ◽  
Multi Target Tracking ◽  
Velocity Information ◽  
Low Frame Rate

We describe a novel tracking system for reconstructing three-dimensional tracks of individual mosquitoes in wild swarms and present the results of validating the system by filming swarms and mating events of the malaria mosquito Anopheles gambiae in Mali. The tracking system is designed to address noisy, low frame-rate (25 frames per second) video streams from a stereo camera system. Because flying A. gambiae move at 1–4 m s −1 , they appear as faded streaks in the images or sometimes do not appear at all. We provide an adaptive algorithm to search for missing streaks and a likelihood function that uses streak endpoints to extract velocity information. A modified multi-hypothesis tracker probabilistically addresses occlusions and a particle filter estimates the trajectories. The output of the tracking algorithm is a set of track segments with an average length of 0.6–1 s. The segments are verified and combined under human supervision to create individual tracks up to the duration of the video (90 s). We evaluate tracking performance using an established metric for multi-target tracking and validate the accuracy using independent stereo measurements of a single swarm. Three-dimensional reconstructions of A. gambiae swarming and mating events are presented.

Tool wear analysis in high-frequency vibration-assisted drilling of additive manufactured Ti6Al4V alloy

Wear ◽  
2021 ◽  
pp. 203814
Author(s):  
Marco Sorgato ◽  
Rachele Bertolini ◽  
Andrea Ghiotti ◽  
Stefania Bruschi
Keyword(s):  
Tool Wear ◽  
High Frequency ◽  
Ti6al4v Alloy ◽  
High Frequency Vibration ◽  
Wear Analysis
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