Next Article in Journal
Hydrogel Microdomain Encapsulation of Stable Functionalized Silver Nanoparticles for SERS pH and Urea Sensing
Next Article in Special Issue
A Comparative Study of Computational Methods for Compressed Sensing Reconstruction of EMG Signal
Previous Article in Journal
A Wide-Band Digital Lock-In Amplifier and Its Application in Microfluidic Impedance Measurement
Previous Article in Special Issue
A Rail Fault Diagnosis Method Based on Quartic C2 Hermite Improved Empirical Mode Decomposition Algorithm
Article Menu

Article Versions

Export Article

Open AccessArticle

Measurement of Dynamic Responses from Large Structural Tests by Analyzing Non-Synchronized Videos

Department of Civil Engineering, National Taipei University of Technology, 1 Sec 3 Zhongxiao E. Rd. 10608 Taipei, Taiwan
Sensors 2019, 19(16), 3520; https://doi.org/10.3390/s19163520
Received: 4 July 2019 / Revised: 8 August 2019 / Accepted: 9 August 2019 / Published: 11 August 2019
PDF [5325 KB, uploaded 11 August 2019]

Abstract

Image analysis techniques have been employed to measure displacements, deformation, crack propagation, and structural health monitoring. With the rapid development and wide application of digital imaging technology, consumer digital cameras are commonly used for making such measurements because of their satisfactory imaging resolution, video recording capability, and relatively low cost. However, three-dimensional dynamic response monitoring and measurement on large-scale structures pose challenges of camera calibration and synchronization to image analysis. Without satisfactory camera position and orientation obtained from calibration and well-synchronized imaging, significant errors would occur in the dynamic responses during image analysis and stereo triangulation. This paper introduces two camera calibration approaches that are suitable for large-scale structural experiments, as well as a synchronization method to estimate the time difference between two cameras and further minimize the error of stereo triangulation. Two structural experiments are used to verify the calibration approaches and the synchronization method to acquire dynamic responses. The results demonstrate the performance and accuracy improvement by using the proposed methods.
Keywords: structural experiments; response measurement; camera calibration; signal synchronization structural experiments; response measurement; camera calibration; signal synchronization
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Yang, Y.-S. Measurement of Dynamic Responses from Large Structural Tests by Analyzing Non-Synchronized Videos. Sensors 2019, 19, 3520.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top