Servizi per la didattica
PORTALE DELLA DIDATTICA

Thermal measurements and controls

01OHHND, 01OHHNE, 01OHHQD

A.A. 2020/21

2020/21

Thermal measurements and controls

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.

Thermal measurements and controls

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.

Thermal measurements and controls

- 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

Thermal measurements and controls

- 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.

Thermal measurements and controls

Basic subjects in Calculus, Physics, Electrotechnics

Thermal measurements and controls

Basic subjects in Calculus, Physics, Mechanics, Electrotechnics.

Thermal measurements and controls

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.

Thermal measurements and controls

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.

Thermal measurements and controls

Thermal measurements and controls

Thermal measurements and controls

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.

Thermal measurements and controls

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.

Thermal measurements and controls

Teaching materials and information are made available through the didactic portal. General text is E.O.Doebelin: Measurement systems, Mc Graw Hill

Thermal measurements and controls

Teaching materials and supplemental information made available through the Student Portal. Select chapters from: E. O. Doebelin, Measurement systems, Mc Graw Hill.

Thermal measurements and controls

Modalità di esame: Prova orale facoltativa; Prova scritta su carta con videosorveglianza dei docenti;

Thermal measurements and controls

The online exam procedure will follow the same pattern as the exam in person with students and teachers in videoconference.

Thermal measurements and controls

Exam: Optional oral exam; Paper-based written test with video surveillance of the teaching staff;

Thermal measurements and controls

The final exam consists of a written test, aimed at assessing the level of familiarity acquired by the student with the topics covered by the course (duration 2 h). The written test includes three open questions requiring descriptions and calculations (in total 24 marks), and multiple-choice questions on specific topics dealt with the course (in total 8 marks). The use of a calculator is allowed. Books and teaching materials are not allowed at the exam. Students can opt for an oral discussion on the course topics to improve the written test result (up to 3 marks).

Thermal measurements and controls

Modalità di esame: Prova scritta (in aula); Prova orale facoltativa; Prova scritta su carta con videosorveglianza dei docenti;

Thermal measurements and controls

The online exam procedure will follow the same pattern as the exam in person with students and teachers in videoconference.

Thermal measurements and controls

Exam: Written test; Optional oral exam; Paper-based written test with video surveillance of the teaching staff;

Thermal measurements and controls

The final exam consists of a written test, aimed at assessing the level of familiarity acquired by the student with the topics covered by the course (duration 2 h). The written test includes three open questions requiring descriptions and calculations (in total 24 marks), and multiple-choice questions on specific topics dealt with the course (in total 8 marks). The use of a calculator is allowed. Books and teaching materials are not allowed at the exam. Students can opt for an oral discussion on the course topics to improve the written test result (up to 3 marks).

Esporta Word


© Politecnico di Torino
Corso Duca degli Abruzzi, 24 - 10129 Torino, ITALY
Contatti