Filtering of NDT signals obtained from wrapped steel cables

R. Christen; A. Novakovic; A. Bergamini; M. Motavalli

doi:10.1117/12.715119

19 April 2007 Filtering of NDT signals obtained from wrapped steel cables

R. Christen, A. Novakovic, A. Bergamini, M. Motavalli

Proceedings Volume 6531, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2007; 653110 (2007) https://doi.org/10.1117/12.715119
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2007, San Diego, California, United States

Abstract

The main cables of suspension bridges are often wrapped with a steel wire, in order to compact the cable and hold it in shape. If a non-destructive evaluation by means of magnetic methods is performed on such a cable, disturbances due to the wrapping can be expected in the measured signal. In the presented work, these disturbances shall be quantified and compared to the flaw signals. Different approaches for the separation of the disturbance and the flaw signal are discussed. Additionally, the possibility to detect wire breaks and corrosion within an unwrapped steel cross-section could be shown in laboratory measurements. The influence of the wrapping was investigated using finite element (FE) simulations and experimental laboratory measurements. A parameter study was performed in order to obtain data in which the components from a flaw and the wrapping can be separated. The parameters varied in this study were chosen depending on the prospect of success and the cost of the realization. Using these data sets different filtering methods, such as wavelet analysis, were implemented. A final comparison of the different methods suggests the most efficient way to assess the condition of such cable systems using magneto-inductive testing. Finally, it can be concluded that the use of FE simulation is a very useful tool for the development of new data analysis methods, even if a real set-up and data from measurements exist.

Citation Download Citation

R. Christen, A. Novakovic, A. Bergamini, and M. Motavalli "Filtering of NDT signals obtained from wrapped steel cables", Proc. SPIE 6531, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2007, 653110 (19 April 2007); https://doi.org/10.1117/12.715119

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
12 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Magnetism

Sensors

Linear filtering

Electronic filtering

Nondestructive evaluation

Wavelets

Measurement devices

Show All Keywords

Keywords/Phrases

Search In:

Publication Years