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  • 1.
    Iacomussi, P
    et al.
    INRIM, Italy.
    Rossi, G
    INRIM, Italy.
    Blatter, P
    METAS, Switzerland.
    Reber, J
    METAS, Switzerland.
    Chain, C
    Cerema, France.
    Muzet, V
    Cerema, France.
    Dubard, J
    LNE, France.
    Van Tang, C
    LNE, France.
    Jouanin, A
    OPTIS, France.
    Kubarsepp, T
    Metrosert, Estonia.
    Lindgren, Mikael
    RISE - Research Institutes of Sweden, Safety and Transport, Measurement Science and Technology.
    Manocheri, F
    Aalto University, Finland.
    Zehntner, P
    Zehntner GmbH, Switzerland.
    Metrology of Road Surface for Smart Lighting2017In: PROCEEDINGSOF THE LUX EUROPA 2017 European Lighting Conference: Lighting for modern society / [ed] Matej B. Kobav, University of Ljubljana, Slovenia, Ljubljana, 2017, p. 103-107, article id OM17Conference paper (Refereed)
    Abstract [en]

    The knowledge of the luminance coefficient q or of the reduced luminance coefficient r of road surface is an unavoidable requirement for designing road lighting installations able to assure adequate road luminance for visual conditions, energy consumption and traffic safety according to standard requirements. Unfortunately q available data refers to measurements made during the seventies with no traceability or measurement uncertainty. In the last 40 years the road surfaces pavements evolved as well the road lighting sources and luminaires. EMPIR project SURFACE will provide validated, optimised and reliable geometrical conditions for the measurement of q as well as reference data representative of current road pavements and future needs, as support of the European Standardisation process, CIE and European Metrology infrastructure.

  • 2.
    Li, Ying Zhen
    et al.
    RISE - Research Institutes of Sweden, Safety and Transport, Safety.
    Ingason, Haukur
    RISE - Research Institutes of Sweden, Safety and Transport, Safety.
    New models for calculating maximum gas temperatures in large tunnel fires2016Report (Other academic)
    Abstract [en]

    The work presented in this report focuses on estimating maximum gas temperatures at ceiling level during large tunnel fires. Gas temperature is an important parameter to consider when designing the fire resistance of a tunnel structure. Earlier work by the authors has established correlations between excess ceiling gas temperature and effective tunnel height, ventilation rate, and heat release rate. The maximum possible excess gas temperature was set as 1350°C, independent of the tunnel structure and local combustion conditions. As a result of this research, two models have been developed to better estimate possible excess maximum gas temperatures for large tunnel fires in tunnels with differing lining materials and structure types (e.g. rock, concrete). These have been validated using both model- and full-scale tests. Comparisons of predicted and measured temperatures show that both models correlate well with the test data. However, Model I is better and more optimal, due to the fact that it is more conservative and easier to use. The fire duration and flame volume are found to be related to gas temperature development. In reality, the models could also be used to estimate temperatures in a fully developed compartment fire.

  • 3.
    Lindgren, Mikael
    et al.
    RISE - Research Institutes of Sweden, Safety and Transport, Measurement Science and Technology.
    Nord, Stefan
    RISE - Research Institutes of Sweden, Safety and Transport, Measurement Science and Technology.
    Spetz, Jörgen
    RISE - Research Institutes of Sweden, Safety and Transport, Measurement Science and Technology.
    CHARACTERIZATION OF REFLECTIVITY AND GEOMETRY FOR SOFT CAR TARGETS2019In: Proceedings of the 29th Session of the CIE, Wien, 2019, Vol. 1, p. 1753-1767, article id PO181Conference paper (Other academic)
    Abstract [en]

    This paper reports on results from a study of characteristics for 3D soft surrogate vehicle targets. Such targets are used extensively for testing and verification of optical sensor systems for Advanced Driver Assistance Systems and Automated Driving. However, the influence of wear-and-tear on the vehicle target is not well known. Consequently, no clear requirement exists on how many collisions a soft target can be exposed to before it no longer performs well.

    Important characteristics for optical sensor systems are surface reflectance in the relevant wavelength range and geometry of the soft target. We report on measurements of spectral reflectivity and geometry performed before, during and after an accelerated ageing campaign involving 100 rear-end collisions at 50 km/h. The reflectivity was found to change very little while the geometry was strongly affected.

  • 4.
    Pendrill, Leslie
    et al.
    RISE - Research Institutes of Sweden, Safety and Transport, Measurement Science and Technology.
    Zelan, Martin
    RISE - Research Institutes of Sweden, Safety and Transport.
    Det nya internationella måttsystemet: – tid för ett nytt måttsystem2017Report (Other (popular science, discussion, etc.))
    Abstract [sv]

    Idag kan alla måttenheter härledas från SI-systemets sju basenheter (meter, kilogram, sekund, kelvin, candela, ampere, mol). Genom nya forskningsframsteg planeras nu en reformering av SI-systemet. Förändringen förväntas att bli beslutad 2018, och forskare på alla länders olika Nationella Metrologiinstitut jobbar nu med förberedelserna för att införa det nya SI-systemet.

  • 5.
    Raaholt, Birgitta
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Food and Bioscience.
    Isaksson, Sven
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Food and Bioscience.
    Hamberg, Lars
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Food and Bioscience.
    Fhager, Andreas
    Chalmers University of Technology, Sweden.
    Hamnerius, Yngve
    Chalmers University of Technology, Sweden.
    Continuous tubular microwave heating of homogeneous foods: evaluation of heating uniformity2016In: The Journal of microwave power and electromagnetic energy, ISSN 0832-7823, Vol. 50, no 1, p. 43-65Article in journal (Refereed)
    Abstract [en]

    A pilot-scale process for continuous in-flow microwave processing of foods, designed and implemented at SP Food and Bioscience, was evaluated for heat treatment of a homogeneous model food for high-temperature short-time (HTST) conditions, at constant total input microwave power, at 2450 MHz. The microwave system has three consecutive cavities, one excited by the TM020 microwave mode that heats primarily in the tube centre, and two TM120 mode cavities that heat primarily in the tube periphery. The temperature uniformity of the homogeneous model food after microwave heating is here evaluated in terms of spatial distribution, for different set-ups of input microwave power in each cavity and for different order of the placement of the cavities, while maintaining the total input microwave power. The microwave heating uniformity is evaluated, based on measured and calculated radial temperature profiles. Combined TM020 and TM120 heating was found to result in more uniform heating by means of spatial temperature uniformity over the tube cross section. Furthermore, appropriately selected microwave power distribution between the centre and periphery heating cavities results in a stable heating profile in the studied food, that differs only about 10 °C or less between highest and lowest average values directly after microwave heating.

1 - 5 of 5
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