INFORMAZIONI SU

Electronic Instrumentation and Sensors (integrato con Electrical and Electronic Measurements)

Programma dell'insegnamento di Electronic Instrumentation and Sensors (integrato con Electrical and Electronic Measurements) - cdl magistrale in Ingegneria Elettronica

Docente/Teacher

prof. Antonio AFFANNI

Crediti/Credits

6 CFU

Obiettivi formativi specifici/Objectives

Harmonic signal analysis by the discrete Fourier transform. Architecture and main specifications of measurements instruments operating in the frequency domain. Working principles of sensors for main physical quantities.

Competenze acquisite/Acquired skills

- Set up of instrumentation to perform correct harmonic analysis.
- Full comprehension of datasheets of spectrum analyzers and VNAs.
- Knowledge of working principles of sensors for the main physical quantities.
- Design of conditioning circuits and interfacing sensors to digital acquisition devices.

Programma/Lectures and exercises

Discrete Time Fourier Transform and digital spectrum analyzer: from FT to DTFT, aliasing, windowing; windows characteristics and choice of window; noise estimation or reduction through vector or RMS averaging (8 hours).
Analog spectrum analyzer: architecture, specifications. Image frequencies, displayed noise, distortion, dynamic range; measurements of AM or UWB signals with spectrum analyzer (10 hours).
Vector Network Analyzer: S parameters, graph signal flow representation; VNAs, architecture, non idealities and calibration (8 hours).
Introduction to sensors: preliminary definitions and classifications of sensors (4 hours).
Temperature sensors: RTDs, NTCs, PTCs, thermocouples, IC (4 hours).
Pressure and flow sensors: pressure sensors, MEMS piezoresistive and capacitive sensors; conditioning circuits; load cells; flow sensors, turbine, differential pressure (Pitot, Venturi), electromagnetic, ultrasound, hot wire anemometer (6 hours).
MEMS inertial sensors: capacitive and piezoresistive accelerometers and gyroscopes (2 hours).
Level linear position and angular position sensors: potentiometer, capacitive, radar UWB, LVDT, magnetostrictive, incremental and absolute optical encoder, Hall-effect encoder, magnetoresistive encoder, capacitive encoder
Current sensors: Hall open loop and closed loop current sensors (2 hours).
Signal conditioning: signal conditioning circuits for resistive, capacitive or self-generating sensors (2 hours).
Labs (10 hours).

Bibliografia/References

- Slides of lectures
- J. Fraden, Handbook of modern sensors: physics, designs and applications, 3rd ed. Springer, 2003
- D. Mirri, G. Pasini, Strumentazione elettronica di misura, Cedam

Modalità d'esame/Type of exam

written and oral