Distributed sensors for damage detection and localization
2009 (English)In: 4th International Conference on Structural Health Monitoring on Intelligent Infrastructure (SHMII-4), 2009Conference paper (Refereed)
Distributed fiber optic sensing technology based on Brillouin scattering effect hasbeen proven as a mean to assess average strain and average temperature distributions instructures. However, detection of damage such as crack is very challenging, since only a shortportion of sensor, much shorter than spatial resolution of the system, is exposed to very highconcentrated strain. Beside this, the sensing fiber itself suffers from concentrated stresses andmay be broken. In order to resolve above mentioned issues, first the detection algorithm wasimproved in order to make system sensitive to measurand changes occurring over length shorterthan spatial resolution, and second a special manner of sensor installation is developed in orderto make possible for optical fiber to survive high concentrated stresses. The system is applied onGota Bridge, Gothenburg, Sweden, for the first time at a large scale. Number of reduced and fullscale tests were performed in order to assess performance of the system. The system, itsimplementation method and results of the tests are presented in this paper.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:kth:diva-78714ScopusID: 2-s2.0-84896894246OAI: oai:DiVA.org:kth-78714DiVA: diva2:492792
4th International Conference on Structural Health Monitoring on Intelligent Infrastructure (SHMII-4). Zurich, Switzerland. 22-24 July 2009
QC 201205022012-02-082012-02-082012-05-02Bibliographically approved