TY - JOUR A1 - Melzer, Michael A1 - Deschermeier, Regina A1 - Bünger, Lars A1 - Wroblowski, Oliver A1 - Demir, Muhammed-Ali A1 - Bubser, Florian A1 - Schüür, Jens T1 - The DCC for temperature and humidity quantities: good practice for enhanced interoperability N2 - In the context of digitalisation, digital calibration certificates are key to provide a fully machine-readable exchange format for metrological traceability of measurements. The most significant challenge is to establish a unique and harmonized DCC scheme, especially within the communities of specific measurement quantities. Here, we focus on the key aspect of refTypes within DCCs, and present recommendations and good practices developed by the DCC working group from the technical committee for temperature and humidity quantities within the German Calibration Service (DKD). Storage of process and quantity information relies on so called refTypeattributes which associate specific meanings to particular information in the DCC architecture. The meanings of some distinguished quantity-specific refTypes are described in this work. For various information that are specific to calibration certificates for temperature and humidity quantities, dedicated good practice implementations in XML are provided, e.g. self-heating, hysteresis as well as the calibration medium and the temperature scale used. Furthermore, the statement of the ambient conditions, that are included in almost any DCC is presented on the example of the ambient temperature. These digitization efforts will allow to automate quality management and metrological traceability in laboratories and industrial measurement technology. KW - Digital calibration certificate KW - QI-Digital KW - Automation KW - Temperature measurement KW - Metrological traceability PY - 2025 DO - https://doi.org/10.1016/j.measurement.2025.120109 SN - 0263-2241 VL - 263 SP - 1 EP - 12 PB - Elsevier B.V. AN - OPUS4-65175 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Liehr, Sascha A1 - Muanenda, Y. S. A1 - Münzenberger, Sven A1 - Krebber, Katerina T1 - Relative change measurement of physical quantities using dual-wavelength coherent OTDR N2 - We propose the use of alternating pulse wavelengths in a direct-detection coherent optical time domain reflectometry (C-OTDR) setup not only to measure strain and temperature changes but also to determine the correct algebraic sign of the change. The sign information is essential for the intended use in distributed mode shape analysis of civil engineering structures. Correlating relative backscatter signal shifts in the temporal/signal domain allows for measuring with correct magnitude and sign. This novel approach is simulated, experimentally implemented and demonstrated for temperature change measurement at a spatial resolution of 1 m. KW - Fiber optics sensors KW - Backscattering KW - Rayleigh KW - C-OTDR KW - Distributed sensing KW - Temperature measurement KW - Strain measurement PY - 2017 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-389449 DO - https://doi.org/10.1364/OE.25.000720 SN - 1094-4087 VL - 25 IS - 2 SP - 720 EP - 729 PB - Optical Society of America CY - Washington, DC, USA AN - OPUS4-38944 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Pulz, Robert A1 - Rehmer, Birgit A1 - Skrotzki, Birgit T1 - Pyrometric temperature measurement of ceramic thermal shock samples N2 - The determination of critical failure parameters during thermal shock requires a time and space resolved temperature measurement of the sample. High frequency pyrometry is a suitable technique for such a measurement task, which usually requires the knowledge of the optical properties of the investigated material. Another challenge is the infrared transparency of materials to be checked in the wavelength range of the pyrometer. The thermal shock disks are very thin, due to the need of homogeneous temperature distribution and to maintain a two-dimensional problem. To allow a pyrometric temperature measurement a universal calibration method for high frequency infrared cameras has been developed. Pyrometry in various media was demanded, as well as the estimation of optical properties (reflection, transmittance and emission) for the selected ceramics to be tested. KW - Temperature measurement KW - Ceramics KW - Emission coefficient KW - Radiation thermometry KW - Thermal shock PY - 2011 DO - https://doi.org/10.1016/j.measurement.2010.09.050 SN - 0263-2241 SN - 1873-412X VL - 44 IS - 1 SP - 259 EP - 266 PB - Elsevier Ltd. CY - London AN - OPUS4-22474 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -