The resolution of analogue measuring devices and its associated uncertainty: An investigation with practical recommendations

Hawam, Ahmed A.; El-Kassas, Ahmed M.; Mahmoud, Gouda M.; Hasan, Ebtisam H.; Ahmadein, Mahmoud

doi:10.1016/j.precisioneng.2021.02.012

Cited by 4 publications

(1 citation statement)

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“…In the case of novel materials, the issue is magnified by the increased complexity of measurement [4], [5]. These investigations on the characterization of innovative materials include significant errors, which may affect the estimations of measurements on these building materials during studies of comfort in thermal and optical building studies [6], [7], [8], [9]. Previously, the McM system uncertainties were only determined experimentally from various materials that thermo-optical properties were known.…”

Section: Introductionmentioning

confidence: 99%

Measuring the uncertainty assessment of an experimental device used to determine the thermo-optico-physical properties of translucent construction materials

Delort¹,

Fakra²,

Mallet-Damour³

et al. 2022

Meas. Sci. Technol.

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Studying thermo-optical (i.e., thermal conductivity, optical re ectance, optical transmittance, and optical absorbance) properties of construction materials is essential for improving human comfort within a building. Typically, these properties are measured independently using specific equipment. The emerging of new innovative construction structures, such as translucent materials, makes the experimental characterization of these properties more challenging to observe. Recently, a new device, called MultiCoefMeter (McM), which rapidly and simultaneously measures all these properties, has been created. The study described in this article covers the calculation technique for estimating measurement uncertainties linked to morphology, the component parts, and the physical formula of the experimental apparatus. The measurement uncertainty estimates are obtained from knowledge of the color of the system's walls, placement, and form of the McM components, placement of measurement sensors, and the application of measurement collection equipment. Therefore, a thorough calculation analysis was performed on the sub-systems. Calculations are divided between two categories: those based on mathematical tools and information given by the makers, and those based on experimental observations obtained during reliability testing. These uncertainties originate from statistical tools, geometric tolerance of the system, comparison with standards, and the error propagation laws of the physical models link with the device. All these uncertainties were summed up and given a global value, no more than 5%, conforming to the ASTM standard (E1225). Finally, a general method to quantify measurement uncertainty value of any experimental device was proposed.

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