TY - THES A1 - Lebid, Solomija T1 - Perturbations in behaviour of fibre Bragg grating sensors introduced by local thermal and mechanical influences N2 - Novel fibre optic sensor (FOS) systems maintaining fibre Bragg gratings (FBG) are finding wide application for health monitoring of large-scale structures such as dams, bridges, towers, as well as aircrafts, robots, automotive vehicles, and in composite technology. The principal advantage of such type of sensors is that the measured information is wavelength encoded (an absolute quantity). The main advantages include small size, immunity against electromagnetic field, good resolution, high sensitivity, and possibility to work in adverse environment. Especially small dimensions of the sensor allow its application for investigation of composite materials. The use of sensors enables to get information in areas, where other sensors would affect the structure or the material. On the other hand, it is important to keep signal stability of the sensor to the measured value of interest and obtain reliable data. Intimate embedment produces, however, additional perturbations affecting optical fibre sensor such as general mechanical stress, microbending, bending, and point-wise transverse load, which result in such undesirable sensor signal changes as attenuation, birefringence, spectrum broadening, sideband increasing, or small wavelength shift. No reliable knowledge about those effects and their consequences to the measured signal could be found in literature. This lack of knowledge led to the motivation of this work. The thesis discusses behaviour of uniform short-period fibre Bragg grating signal under before mentioned perturbing influences. The main accent is made onto theoretical and experimental study of additional mechanical perturbations: point-wise transverse indentation, and microbending, arising at sensor operation depending on the grating integration type and measurement purpose. Response of this type of gratings (unapplied and integrated in/on the object to be mesaured) to the axial strain and composite-integrated gratings to the temperature is also investigated. Problems arising from the sensor fixing on/in the object to be measured are considered. T3 - BAM Dissertationsreihe - 2 PY - 2004 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-1568 SN - 978-3-86509-136-9 SN - 1613-4249 VL - 2 SP - 1 EP - 170 PB - Wirtschaftsverlag NW CY - Bremerhaven AN - OPUS4-156 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Lebid, Solomija A1 - Habel, Wolfgang A1 - Daum, Werner T1 - How reliable measure composite-embedded FBG sensors under the influence of transverse and point-wise deformations? T2 - Technical digest of the 16th International Conference on Optical Fiber Sensors, OFS-16 T2 - 16th International Conference on Optical Fiber Sensors (OFS-16) CY - Nara, Japan DA - 2003-10-13 PY - 2003 SN - 4-89114-036-4 SP - 46 EP - 49 PB - IEICE CY - T¯oky¯o AN - OPUS4-2887 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Lebid, Solomija A1 - Gutmann, Toivo A1 - Habel, Wolfgang T1 - Characterisation of high-perfomance composites by using structure-integrated FBG sensors T2 - Proceedings of the TEST 2003 T2 - International Conference on Materials Testing ; TEST Kongress ; TEST Conference CY - Nuremberg, Germany DA - 2003-05-13 PY - 2003 IS - A 3.1 SP - 59 EP - 64 PB - AMA Service GmbH CY - Wunstorf AN - OPUS4-2888 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Lebid, Solomija A1 - Gutmann, Toivo A1 - Habel, Wolfgang A1 - Peupelmann, J. A1 - Schäfer, C. T1 - Influence of Perturbing Effects on Composite-embedded Fibre Bragg Grating Signals JF - Scientific reports : journal of the University of Applied Sciences Mittweida PY - 2002 SN - 1430-3698 SN - 1437-7624 VL - 10 SP - 41 EP - 46 PB - Hochschule Mittweida CY - Mittweida AN - OPUS4-2076 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Lebid, Solomija A1 - Gutmann, Toivo A1 - Habel, Wolfgang T1 - Validierung von Faser-Bragg-Gitter-Sensoren zur Sicherstellung zuverlässiger Messaussagen T2 - Seminar am Fachgebiet Optronik der HTWM T2 - Seminar am Fachgebiet Optronik der HTWM CY - Mittweida, Germany DA - 2003-08-06 PY - 2003 AN - OPUS4-5132 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -