Multitasking FBG sensors for condition monitoring with a wideband (DC-MHz) interrogation system

Ziv Glasser, Egor Liokumovitch, Stas Bank, Nadav Simor, Alexander Kalnitsky, Shmuel Sternklar

Research output: Contribution to journalArticlepeer-review


We demonstrate diagnosis of several machine-condition failures using wide-frequency-band interrogation of fiber Bragg grating (FBG) sensors. In collaboration with Israel's national water companyMekorot Ltd., a scaled-down version of a semi-submerged pumping system was constructed. By monitoring broadband signals from DC to ultrasound (>MHz), at different points of the engine and the submersed pump, the system was able to diagnose incipient cavitation, faulty bearings, and submerged dynamic water-level measurements. In addition, a metal embedded FBG sensor was investigated, revealing the potential of using FBGs in applications where bonding is problematic such as bearing housing. These results prove that wideband data acquisition, together with advanced analytics, could open a variety of new applications in the fields of structural health and machine-condition monitoring.

Original languageEnglish
Pages (from-to)5890-5895
Number of pages6
JournalApplied Optics
Issue number22
StatePublished - 2023


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