Politecnico di Torino
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Politecnico di Torino
Academic Year 2010/11
01MOFNX, 01MOFOD
Measurement
1st degree and Bachelor-level of the Bologna process in Electronic Engineering - Torino
1st degree and Bachelor-level of the Bologna process in Physical Engineering - Torino
Teacher Status SSD Les Ex Lab Tut Years teaching
SSD CFU Activities Area context
ING-INF/07 8 B - Caratterizzanti Ingegneria elettronica
Subject fundamentals
This course is compulsory for the bachelor of electronic engineering; it is located in the 3rd year 2th term. The course provides the basics of the modern measurement science, the international system of units (SI) and the uncertainty estimation. The course also deals with the behaviour and the proper use of the common electronic instrumentation along with the instrument characteristics, their operating limits and accuracy. Main measuring methods for electrical quantities (voltage, current, resistance, frequency, impedance and power up to VHF and UHF) are discussed. An introduction is eventually given to automatic measurement systems, programmable instrumentation and the most popular object-oriented programming platforms. The student is requested to be able to employ instrumentation and to perform a typical test procedure of an electronic laboratory telecommunications oriented as well as for testing on components and systems.
Expected learning outcomes
- To know the basics of the measurement theory and of the uncertainty propagation according to the probabilistic model. To know how to communicate the measurement results
- To be able to estimate the uncertainty of a measurement and to communicate it.
- To know working principle, capabilities and limits of common instrumentation
- To know the main measurement methods for both electrical and non-electrical quantities.
- To be able to choose the most suitable instrument and the most suitable measuring method for a specific application.
- To know the basic methods for managing programmable conventional and virtual instrumentation
- To be able to design a conventional/automatic measurement system using commercially available software
Prerequisites / Assumed knowledge
Fundamentals of physics and electrical engineering in direct and alternating current. Knowledge of the transient analysis of electrical circuits and the transfer functions in the frequency domain. Fundamental concepts of statistical, probability and the of signal theory. Fundamental concepts of spectral analysis of continuous and sampled signals. Knowledge of the basic analog electronics at level of functional blocks with fundamental concepts of the feedback.
Contents
- Fundamentals of the measurement theory, measurement uncertainty, uncertainty propagation, propabilistic model, International system of units and the measurement traceability; overview of the unity standards (15h)
- Analogue and digital instruments for DC and AV voltage, current, and resistance measurement; single and dual slope AD converters; comparison, zero resonance and bridge methods for resistance and impedance measurement; LF and RF power measurements. (20h)
- Digital storage oscilloscope: operating principles and fundamental characteristics. Problems related to signal acquisition. (10h)
- Digital frequency meters, methods for the measurement of frequency with phase comparison techniques and beats; LF and RF and beat based signal generators, waveform generators. Signal generators based on the frequency synthesis , frequency and time standards. (15h)
- Spectrum Analyzer: operating principles and fundamental characteristics; analogue and digital architectures. (10h)
- Introduction to programmable measurement systems, on board and modular instrumentation, programming environment based on virtual instruments. (10h)
Delivery modes
Practical lessons concerning the developed theory and focused on the uncertainty estimation. Five to seven laboratory experiments are carried out in groups of 3-4 students on measurement of sinusoidal and non-sinusoidal waveforms, period and frequency measurements; waveforms measurements with digital storage oscilloscope; resistance measurements with bridge methods; training in the use of automatic measurement systems. At the end of each laboratory, each student group may decide to compile a report that can be evaluated by the teacher with a score that contributes to the mark of final test.
Texts, readings, handouts and other learning resources
L.D. Jones, A.F. Chin: Electronic Instruments and Measurements (second edition), Englewood Cliffs, Prentice-Hall, 1991.
S. Rabinovich: Measurement Error ' Theory and Practice, American Institute of Physics, 1995.
A. Carullo, U. Pisani, A. Vallan: Fondamenti di misure e strumentazione elettronica, Ed. CLUT Torino, 2006.
U. Pisani: Misure Elettroniche, Ed. Politeko, Torino, 2000.
Copy of slides, examples and exercises available on the web portal.
Assessment and grading criteria
The final examination consists in a written test composed of two parts: one contains simple exercises and closed and/or open questions and the other consisting in problems on the instrument use and on uncertainty propagation in indirect measurements. Regardless from the final score, students must reach a minimum score of 15/30 in each section to pass the exam. In the first exam session after the end of the course, the students can ask the teacher to evaluate the laboratory reports that may be used to increase to final score up to 4/30. The teacher reserves the right to orally question students in the case of doubts on the written exam and/or on the reports.

Programma definitivo per l'A.A.2010/11
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