Structural damage detection using wireless sensors accounting for data loss

S. T. Quek, V. A. Tran, W. H. Duan, X. Y. Hou

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

2 Citations (Scopus)

Abstract

This paper addresses the issue of intermittent data loss during transmission of wireless network sensors and the application of the reconstruction signal for damage detection with the damage locating vector (DLV) method. The algorithm makes use of frequencies which contribute significant amount of energy in the signal based on Fourier transform. As the amplitudes are uncertain due to lost data, the Fourier amplitudes are estimated based on least-square fit of only the measured portions of the signal. The lost portions are reconstructed through inverse Fourier transform. The procedure is iterated until the discrepancy between estimated lost portions of two consecutive iterations is below a set threshold. This threshold and the power spectral threshold to demarcate the significant frequencies are selected based on results from numerically simulated signals. The reconstructed signals are used with the DLV method for damage detection to investigate the practicality of this procedure. A cantilever truss structure with a pre-stressed cable was monitored using six wireless sensors. The pre-stressed cable was cut mid-way during random load application and data collection. The results obtained support the use of the reconstructed signal within the framework of the DLV method.

Original languageEnglish
Title of host publicationSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009
Volume7292
EditionPART 1
DOIs
Publication statusPublished - 2009
EventSPIE: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009 - San Diego, United States of America
Duration: 9 Mar 200912 Mar 2009
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/7292/1/Front-Matter-7292/10.1117/12.830680.full

Conference

ConferenceSPIE: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009
Abbreviated titleSPIE Smart Structures/NDE 2009
CountryUnited States of America
CitySan Diego
Period9/03/0912/03/09
Internet address

Keywords

  • Damage locating vector
  • Lost data reconstruction
  • Structural damage detection
  • Wireless sensors

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