- Docente: Giulio Cazzoli
- Credits: 3
- Language: Italian
- Teaching Mode: Traditional lectures
- Campus: Bologna
-
Corso:
Second cycle degree programme (LM) in
Energy Engineering (cod. 0935)
Also valid for First cycle degree programme (L) in Energy Engineering (cod. 0924)
Learning outcomes
Provide the skills required for the machine management and for the measures to be carried out to verify their performance.
Course contents
International System of Units: Basic and derived quantities. Comparison with the technical and Imperial systems. Conversion factors
Theory of errors. Accidental and systematic errors. Statistical approach to the error analysis, repeated tests, error propagation.
Elements of statistical inference. The normal, Student, F-Snedecor, chi square distribution and their usage for comparing the expected values of mean and variance. ANOVA.
Types of instruments and their verification: precision, accuracy, zero and linearity requirement, accuracy classes of the instruments. Static calibration using linear regression.
Measurements of temperature: the temperature scale and calibration references, thermometers dilation bulb and capillary glass and metal, Thermocouples, variation of electrical resistance. Precautions to be observed in the temperature measurement.
Strain measurements using strain gauges: Percentage change in resistance. measurement by the Wheatstone bridge.
Pressure measurements: Bourdon tube, diaphragm and piezoelectric pressure gauges.
Velocity and flow measurements in fluids: Pitot tube. throttling devices: diaphragm and venturi
Measurements of torque and power: Dynamometer. Froude hydraulic brake and eddy current brake.
Readings/Bibliography
Azzoni, P.M., "Strumenti e misure per l'ingegneria meccanica", Hoepli
Minelli, G., "MISURE MECCANICHE", Ed. PatronDoebelin, E.O., "STRUMENTI E METODI DI MISURA", Ed. MacGraw Hill
Teaching methods
The course consists of lectures carried out in a conventional manner
Assessment methods
The course involves obligatory attendance.
For students who have acquired attendance the assesment involves the resolution of some numerical exercises.
For students who have not acquired attendance, the assesment involves the resolution of some numerical exercises and an examination designed to verify the knowledge of the instruments or measurement methodologies.
Links to further information
http://diem1.ing.unibo.it/personale/cazzoli/
Office hours
See the website of Giulio Cazzoli