Defence of dissertation in the field of Measure Science and Technology, M.Sc. (Tech.) Shahin Tabandeh

The title of thesis is “Advances in Humidity Standards”

Reliable humidity measurement is attracting an increasing interest due to its crucial role in the industry, meteorology, pharmaceutical manufacturing, electronics, food industry and air conditioning. Metrological traceability to SI through appropriate humidity standards is a key to the reliability needed in these applications. This work addresses improved humidity standards by developing new calculation methods and calibration systems and approaches in the following areas:

1-A novel approach for water vapor enhancement factor formulation:
This section presents the numerical implementation of different approaches to estimate the water vapor enhancement factor as well as a new functional equation for metrological applications.

2-A humidity generator for dew-point temperatures above 100 °C:
It presents design, development and validation of a humidity generator which exploits a microwave resonator as its reference. This work is aimed to extend the world-class humidity standards up to 140 °C in terms of dew-point temperature with a potential industrial impact to save up to 30 M€/year in Europe.

3-Non-static calibration of second-order probes:
It introduces the theoretical basis for a generic non-static calibration of second order probes to chain their measurements to the highest SI-traceability hierarchy level for the entire operating range in the shortest time. (e.g. 30 times faster than conventional methods for RH sensors)

4-A neural network-based uncertainty algorithm:
It introduces NNUA as an iterative algorithm aimed at propagating input uncertainties and/or PDFs in MIMO, nonlinear and computationally expensive mathematical models. This uncertainty algorithm assures similar results to that of adaptive Monte-Carlo method with much higher efficiency in a mathematically sound manner (e.g. 6800 times faster convergence for a worked example).

Opponents: Professor José Juan Segovia University of Valladolid, Spain and PhD Hisashi Abe, National Metrology Institute of Japan, Japan

Supervisor:  Professor Erkki Ikonen Aalto University School of Electrical Engineering, Department of Signal Processing and Acoustics.

Thesis web site

Contact information: Shahin Tabandeh, Istituto Nazionale di Ricerca Metrologica, Str. delle Cacce, 91, 10135 Torino TO, [email protected], +39 380 129 2479


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