@inproceedings{DenglerVinogradovZiemannetal.2021, author = {Dengler, Simon Andreas and Vinogradov, Juri and Ziemann, Olaf and Engelbrecht, Rainer and Schmauß, Bernhard}, title = {Low Cost POF OTDR Reaches 200 m Sensing Distance}, volume = {2021}, publisher = {The International Committee on Polymer Optical Fibers, ICPOF}, address = {Jinhua City}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:92-opus4-26577}, pages = {13}, year = {2021}, language = {en} } @inproceedings{VinogradovMorfDengleretal.2021, author = {Vinogradov, Juri and Morf, Fabian and Dengler, Simon Andreas and Engelbrecht, Rainer and Ziemann, Olaf}, title = {FPGA and APD Based Optical Time Domane Reflectometry in Sensor Applications}, series = {The 28th International Conference on Plastic Optical Fibers 2019-11-20}, booktitle = {The 28th International Conference on Plastic Optical Fibers 2019-11-20}, year = {2021}, abstract = {This paper shows an optical time domain reflectometry (OTDR) system based on an avalanche photodiode (APD) receiver, a 520 nm laser diode transmitter, a high-speed analog-to-digital converter (ADC) and a commercially available field programmable gate array (FPGA). This approach allows OTDR measurements up to 200 m and provides a spatial resolution of 20 cm. Depending on the number of averaging, the measurement time can be between 5 s and 50 s for a range up to 200 m with a good signal to noise ratio.}, language = {en} } @inproceedings{DenglerSchmidtLuberetal.2021, author = {Dengler, S. and Schmidt, N. and Luber, M. and Fischer, J. and Ziemann, Olaf and Engelbrecht, Rainer and Hangen, H.}, title = {B8.3 Influence of Temperature on Distributed Strain Sensing with OTDR in Polymer Optical Fibers}, series = {SMSI 2021 - Sensors and Instrumentation}, booktitle = {SMSI 2021 - Sensors and Instrumentation}, publisher = {AMA Service GmbH, Von-M{\"u}nchhausen-Str. 49, 31515 Wunstorf, Germany}, isbn = {978-3-9819376-4-0}, doi = {10.5162/smsi2021/b8.3}, pages = {155 -- 156}, year = {2021}, abstract = {Strain in ground and earthworks can be measured by polymer optical fibers (POF) applied to geotextiles. We measure the increase of backscatter (IOB) in the fiber under strain using optical time domain reflectometry (OTDR). The effect of temperature on this measurement principle is investigated. The local backscatter changes by 0.003 dB/K for common ambient temperature. In addition it is shown, that temperature depended viscoelastic properties of the polymer does affect IOB.}, language = {en} } @article{ZiemannHeinlVinogradovetal.2021, author = {Ziemann, Olaf and Heinl, Wolfgang and Vinogradov, Juri and Kruglov, Roman and Offenbeck, Bernd}, title = {Die Polymerfaser im industriellen Einsatz bis 500 m}, series = {Elektronik-Praxis}, volume = {17}, journal = {Elektronik-Praxis}, publisher = {Vogel Communications Group GmbH \& Co. KG}, address = {W{\"u}rzburg}, issn = {0341-5589}, pages = {4}, year = {2021}, abstract = {Wegen der hohen D{\"a}mpfung l{\"a}sst sich die optische Polymerfaser (POF) nicht f{\"u}r Leitungen einsetzen, die l{\"a}nger als 100 m sind. Werden alle Parameter ausgenutzt, sind gr{\"o}ßere L{\"a}ngen m{\"o}glich.}, subject = {Optische Polymerfaser}, language = {de} }