Measurements

Subject description

a) Fundamental principles and methods of measurement;

b) Measurement of electrical quantities (voltage, current, power, resistance, capacitance, inductance, frequency, phase, power factor, …), and estimation of basic three parameters of the periodic quantities (frequency, amplitude, and phase angle);

c) Analysis of errors in the acquisition of measurement signals with suitable signal conditioning (shunt, voltage divider, measurement transformer etc.);

d) Reduction of the influence of disturbing signals and measurement bridges;

e) Structure of measuring instruments and systems (structure and elements, static and dynamic characteristics, influence quantities, analog and digital conditioning and signal processing).

f) Measuring accuracy and uncertainty (absolute and relative errors, measurement result, true value, statistic analysis, measurement uncertainty), signal conditioning;

g) Metrology systems (quantities, units and realization, etalons, disemination, traceability, calibration, conformity assessment);

h) Measurement of non-electrical quantities (temperature, humidity, preasure, force, lenght, noise, …);

i) Measurements for green transition, energy efficiency, environmental sustainability, climate change mitigation.

The subject is taught in programs

Objectives and competences

The course introduce basic knowledge of metrology and measurements of technical quantities. Objectives of the course are:

a) To get acquainted with the basic knowledge of measurements and principles and methods of measurement of the most important quantities in engineering and their parameters;

b) To understand the concept of evaluation of the measurement result expressed with uncertainty and to study the meaning of statistic and analysis of measurement uncertainty;

c) To study the fundamentals of metrology and metrological systems, Si units, traceability, etc.;

d) To learn the methods of measurements of the basic electrical quantities and caracteristics of the measurement transducers;

e) To introduce the basic principles of digitalization of the measurement signals in the time and frequency domain (sampling, A/D conversion techniques, etc.);

f) To get acquainted with the basic measuring instrumentation (multi-meter, electronic oscilosscope, universal counter, etc.) and with the avtomatization of the measurement systems (instrument and computer);

g) Introduction in the laboratory-instrumentation practices and to learn the security requirements and protection in measurements;

h) To learn terms and concepts of green transition, energy efficiency, environmental sustainability, climate change mitigation.

Teaching and learning methods

Lectures, laboratory tutorials

laboratory work in small groups

Method of learning and teaching through artistic experience

Expected study results

After successful completion of the course, students should be able to:

a) To get information and adopt the basics of metrology;

b) Understanding of methods how to measure basic elektromagnetic and non-electric quantities;

c) To know how to express the mesasurement results with measurement uncertainty;

d) To learn terms and concepts of green transition, energy efficiency, environmental sustainability, climate change mitigation.

Basic sources and literature

Bentley, J.P., Principles of Measurement Systems (4. edition), Pearson, Prentice Hall, 2005.
Morris A.S., Measurement and Instrumentation Principles, Third Edition, Oxford: Butterworth-Heinemann, 2010.
Agrež D. in ostali, Meritve in merilna instrumentacija – laboratorijski praktikum (ver. 3), University of Ljubljana, Faculty of Electrical Engineering, 2013.
Tumanski S., Principles of Electrical Measurement, Taylor & Francis, CRC Press, 2006.
Evaluation of measurement data – Guide to the expression of uncertainty in measurement International Joint Committee for Guides in Metrology, 2008, (http://www.bipm.org/en/publications/guides/gum.html).