<title>Special sensors for deformation measurements of different construction materials and structures</title>

Ten-year monitoring of high-rise building columns using long-gauge fiber optic sensors

“…Selection of the monitoring system was constrained by criteria 1 and 5-7 above. The fiber optic longgauge strain monitoring system SOFO [17] based on low coherence interferometry was selected, as it fulfils the project requirements, i.e., it features excellent longterm stability, insensitivity to electro-magnetic interferences, humidity, and corrosion, physical robustness necessary for safe and easy handling and embedding in concrete [18], and excellent measurement performance-a resolution of 2 µm independent of the gauge length and linearity better than 0.2% of measured deformation [17][18][19]. Random error of the system was equal to the resolution, while the relative systematic error was equal to the linearity.…”

A new flexible FBG sensing beam for measuring dynamic lateral displacements of soil in a shaking table test

“…However, their performances are unsatisfactory due to limited measuring accuracy or restriction on surface measurement. To overcome these limitations, fiber optic sensing technology is an ideal approach to be employed in geotechnical engineering due to its intrinsic merits, such as small size, light weight, high precision, and resistance to electromagnetic interference [4,5]. Additionally, fiber optic sensors can be easily connected in series to form a quasi-distributed or multiplex array in parallels and installed in geotechnical structures with a minor perturbation.…”

Structural Analysis and Validation of a Smart Pantograph Mast Concept

“…Once the proof of the concept is established in this article, more sophisticated sensing systems for the mast could be designed based not only on FO pressure sensors (Pinet et al, ), but also on FO strain or displacement sensors (Glisic et al, ; Inaudi et al, ). The preference for FO sensors is based on their proven accuracy, resolution, versatility, and long‐term stability (Inaudi and Glisic, , ; Glisic and Inaudi, ).…”