Unit ELECTRONIC MEASUREMENTS
- Course
- Computer science and electronic engineering
- Study-unit Code
- A003158
- Curriculum
- Ingegneria informatica
- Teacher
- Alessio De Angelis
- Teachers
-
- Alessio De Angelis
- Hours
- 81 ore - Alessio De Angelis
- CFU
- 9
- Course Regulation
- Coorte 2022
- Offered
- 2024/25
- Learning activities
- Caratterizzante
- Area
- Ingegneria elettronica
- Academic discipline
- ING-INF/07
- Type of study-unit
- Opzionale (Optional)
- Type of learning activities
- Attività formativa monodisciplinare
- Language of instruction
- Italian
- Contents
- This course aims at providing knowledge and skills related to Measurement Theory, measurement of electric quantities, and modern measurement instrumentation. Lab activities are envisioned, to consolidate both knowledge and skills.
- Reference texts
- Teaching material provided by the instructor
- Educational objectives
- Learning Objectives
- Understand the main aspects of Measurement Theory
- Understand the main methods for measuring electrical quantities
- Understand methods for estimating and reducing measurement uncertainties, their use in compliance testing
- Understand techniques for measurement and data acquisition.
- Understand the architecture and usage of electronic measurement instrumentation (multimeters, oscilloscopes, counters, spectrum analyzers) and data acquisition systems in practice.
Target skills
- Ability to design and implement a system for the measurement of electrical quantities
- Skill in the selection and implementation of systems for conditioning electrical quantities measured.
- Ability to select and use electronic measurement instrumentation
- Ability to estimate the measurement uncertainty associated with a given measurement
- Ability to perform compliance verification
- Ability to design and use data acquisition systems. - Prerequisites
- For a better understanding, skills related to courses of Calculus I/II, Physics B, Probability Theory, Signal Theory, Circuit Theory, and Electronics should be already acquired
- Teaching methods
- Classroom lectures, lab activities.
- Other information
- For any questions, or scheduling meetings, contact the teacher: alessio.deangelis@unig.it
- Learning verification modality
- The exam consists of a written test and an oral test. The written test lasting 2 hours aims to ascertain the knowledge acquired and the ability to connect topics in order to solve problems of a practical nature. The written test consists of ten multiple-choice questions and two exercises to be solved by numerical calculations.
The oral test gives the student an opportunity to show other aspects of his or her preparation during a dialogue with the committee lasting about 20-25 minutes. - Extended program
- Part I - Measurement Theory
- Introduction and definitions;
- Empirical cognitive processes and measurement scales;
- Measurement uncertainty: definitions and evaluation methods; Probabilistic approach. Intrinsic, interaction and instrumental uncertainty; Type A, B and compound uncertainty. Extended uncertainty, coverage factors, compliance checks;
- Metrological traceability and the International System, calibration;
- Uncertainty evaluation in indirect measurements, law of propagation of uncertainties;
Part II - Circuits for signal conditioning.
- Measurement bridges: Wheatstone bridge, double weighting and substitution method, deflection and AC bridges;
- Operational amplifier: assumption of ideality, inverting, non-inverting configuration, differential, CMRR, sensitivity, gain-bandwidth product, noise sources;
- Op-amp-based circuits: voltage follower, summers, filters, integrator, differentiator, instrumentation amplifier (INA), rectifiers, logarithmic amplifier. Positive feedback: Schmitt trigger, relaxation oscillator. Performance metrics;
- Laboratory exercises on measurement bridges and op-amp based circuits;
- Classroom exercises on conditioning circuits and uncertainty calculation;
Part III - A/D Converters.
- Introductory notes. sampling, quantization, and encoding. Sample and Hold;
- Flash converters: architecture, midrise/midtread distinction. Sources of uncertainty;
- Flash converters interleaved, multistep, successive approximations, voltage-time, double integration;
- Digital-to-Analog converter, potentiometric DAC, with current output, sigma-delta;
Part IV - Instrumentation.
- Digital multimeter: architecture, load effect, 2- and 4-wire resistance measurement, metrological characteristics, measurement uncertainty;
- Digital oscilloscope: architecture, triggering, memory management, equivalent-time sampling, frequency response, rise time;
- Measurement of electrical quantities in industry: range extension, voltamperometric method, measurement transformers, wattmeter, current clamp;
- Universal counter: architecture, fundamental blocks;
- Spectrum analyzer: functionality, classification, architecture of superheterodyne spectrum analyzer, performance parameters, FFT spectrum analyzer;
- Data acquisition systems: architecture, use and performance parameters;
- Classroom exercises on evaluating uncertainty in measurements with instrumentation;
- Laboratory exercises: building measurement circuits. Use of instrumentation (which includes multimeters, oscilloscopes, power supplies, generators) to solve practical problems and characterize measurement uncertainty. Use of software for measurement data acquisition and processing.