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Thermal measurements and controls

01OHHND, 01OHHNE, 01OHHQD

A.A. 2022/23

Course Language

Inglese

Course degree

Master of science-level of the Bologna process in Ingegneria Energetica E Nucleare - Torino
Master of science-level of the Bologna process in Ingegneria Meccanica - Torino
Master of science-level of the Bologna process in Ingegneria Meccanica (Mechanical Engineering) - Torino

Course structure
Teaching Hours
Lezioni 30
Esercitazioni in aula 30
Teachers
Teacher Status SSD h.Les h.Ex h.Lab h.Tut Years teaching
Fernicola Vito     30 15 0 0 7
Teaching assistant
Espandi

Context
SSD CFU Activities Area context
ING-IND/10 6 D - A scelta dello studente A scelta dello studente
Valutazione CPD 2021/22
2020/21
The aim of the subject is to provide students with the basic knowledge necessary to approach thermal measurement and control problems, with reference in particular to civil and industrial engineering fields. The subject is quite interdisciplinary as it is also aimed at building a bridge between theory and practice, teaching the student to interact with physical world in its complexity, to adopt the simplest possible models without exceeding in simplification with the risk to miss meeting the desired level of uncertainty, and to take as a consequence realistic engineering decisions.
The aim of the subject is to provide students with the basic knowledge necessary to approach thermal measurement and control problems, with reference in particular to energy and industrial engineering. The subject is quite interdisciplinary and it is aimed at building a bridge between theory and practice, teaching the student to interact with physical world in its complexity, to adopt the simplest possible models at the desired level of uncertainty, without exceeding in simplification, and a consequence to take realistic engineering decisions.
- Knowledge of general Metrology concepts, in particular for what concerns uncertainty in measurements and in the realization of reference standards for physical quantities related to temperature. - Knowledge of uncertainty evaluation and specification techniques, and ability to apply them in measurement problems. - Knowledge of general characteristics of sensors and transducers related to temperature, and electronic measurement instrumentation. - Basic knowledge of control theory as applied to thermal control systems
- Knowledge of general characteristics of sensors and transducers related to thermal measurements and associated electronic instrumentation. - Knowledge of general metrology concepts, in particular for what concerns the uncertainty in measurements and the realization of standards for physical quantities related to temperature, pressure and flow. - Knowledge of uncertainty evaluation and specification techniques, and ability to apply them in measurement problems. - Basic knowledge of control methods as applied to thermal control systems. - Ability to specify, select and use fit-for-purpose sensors and transducers for temperature, pressure and flow measurements and the associated electronic equipment. - Ability to estimate the measurement uncertainty of temperature measuring systems. - Ability to select and use proper thermal control methods and tune PIDs controllers.
Basic subjects in Calculus, Physics, Electrotechnics
Basic subjects in Calculus, Physics, Mechanics, Electrotechnics.
Part 1 General characteristics of sensors and measurement systems: definitions and examples. Null sensors. Closed loop sensors. Static characterisation of sensors: calibration procedures and calibration curve; sensitivity and linearity. Errors and Type A and Type B Uncertainty evaluation, combination and propagation. Influence quantities. Dynamic regime study of sensors and systems for thermal measurements. Response time. Dynamic error. First and second order linear systems. Response to canonical input signals. Laplace transform method for the solution of differential equations. Transfer functions in the time domain and in the frequency domain. The Fourier transform. Experimental determination of dynamic characteristics. Basic features of Operational Amplifiers and their non-ideality as source of errors and uncertainties in interface circuits. Part 2 Sensors of physical quantities relevant for thermal measurements: - Measurements of pressure (principles, sensors, transducers) - Temperature (thermodynamic scale, ITS-90 and reference standards, resistance and thermoelectric thermometry, radiation laws, pyrometers) - Air humidity measurements (principles, sensors, transducers) - Flux measurements (principles, sensors, transducers) Part 3 Basics of automatic control theory. Control and regulation of thermal quantities. Static and dynamic analysis of regulated systems. On-off and PID control systems. Mathematical models and optimal regulation.
Part 1 General characteristics of sensors and measurement systems: definitions and examples; deflection types and null detectors. Static characterisation of sensors: calibration procedures and calibration curve; sensitivity and linearity. Errors and uncertainty; type A and type B uncertainty evaluation; uncertainty combination and propagation; influence quantities. Dynamic regime of sensors and systems for thermal measurements. Response time and dynamic error. First and second order linear systems. Response to canonical input signals. Laplace transform method for the solution of differential equations. Transfer functions in the time domain and in the frequency domain. Experimental determination of dynamic characteristics. Basic features of sensor interfacing and the source of errors and uncertainties in interfacing with operational amplifiers. Part 2 Sensors of physical quantities relevant for thermal measurements: - Temperature (thermodynamic and practical scales, reference standards, resistance and thermoelectric thermometry, radiation thermometry) - Measurements of pressure (principles, sensors, transducers) - Flow measurements (principles, sensors, transducers) Part 3 Basics of automatic control theory. Static and dynamic analysis of controlled systems. Control methods of thermal quantities; PID control systems. Mathematical models, optimal regulation and tuning.
Laboratory work on the realisation of electronic interfaces (at the Department of Electronics). Laboratory lectures on measurements of Temperature, Humidity, Pressure and Flux, and on the regulation of a thermal process by and industrial PID controller (at INRIM). Visits to INRIM laboratories where national standards of reference are held and developed for physical quantities. Classroom exercises under supervision on uncertainty and exam type problems.
Classroom lectures and exercises on temperature, pressure and flow measurements (36 h). Laboratory lectures on thermal process control and industrial PID controller (10 h). Classroom exercises under supervision on uncertainty estimates and exam type problems (10 h). Visits to INRIM laboratories where national standards for physical quantities are developed (4 h). The visit at INRIM laboratories is subject to health regulations and restrictions in place at the time of the visit. In case the visit would not be possible, classroom lectures will replace on site visits.
Teaching materials and information are made available through the didactic portal. General text is E.O.Doebelin: Measurement systems, Mc Graw Hill
Teaching materials and supplemental information made available through the Student Portal. Select chapters from: E. O. Doebelin, Measurement systems, Mc Graw Hill.
Modalità di esame: Prova scritta (in aula);
Exam: Written test;
The final exam consists of a written test, aimed at assessing the level of familiarity acquired by the student with the subjects covered within the course, and an oral discussion aimed at assessing his promptness in elaborating correct answers to further questions on the written test and other related matters. The written test includes a few open questions requiring a brief description or simple calculations, and several multiple choice questions on specific details of different subjects treated in the course. No technical material is allowed at the exam.
Gli studenti e le studentesse con disabilità o con Disturbi Specifici di Apprendimento (DSA), oltre alla segnalazione tramite procedura informatizzata, sono invitati a comunicare anche direttamente al/la docente titolare dell'insegnamento, con un preavviso non inferiore ad una settimana dall'avvio della sessione d'esame, gli strumenti compensativi concordati con l'Unità Special Needs, al fine di permettere al/la docente la declinazione più idonea in riferimento alla specifica tipologia di esame.
Exam: Written test;
The final exam consists of a written test, aimed at assessing the level of familiarity acquired by the student with the subjects covered within the course, and an oral discussion aimed at assessing his promptness in elaborating correct answers to further questions on the written test and other related matters. The written test includes a few open questions requiring a brief description or simple calculations, and several multiple choice questions on specific details of different subjects treated in the course. No technical material is allowed at the exam.
In addition to the message sent by the online system, students with disabilities or Specific Learning Disorders (SLD) are invited to directly inform the professor in charge of the course about the special arrangements for the exam that have been agreed with the Special Needs Unit. The professor has to be informed at least one week before the beginning of the examination session in order to provide students with the most suitable arrangements for each specific type of exam.
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