Instrumentation I

Scholar Year: 2019/2020 - 1S

Courses

Head Teacher Responsability José Miguel Costa Dias Pereira Head

Weekly workload Hours/week T TP P PL L TC THE EL OT OT/PL TPL S Type of classes 4 2 Lectures Type Teacher Classes Hours Theorethical and Practical classes Totals 3 12,00 Dias Pereira   8,00 Prática Laboratorial Totals 1 2,00 Dias Pereira   4,00

Teaching language

Portuguese

Intended learning outcomes (Knowledges, skills and competencies to be developed by the students)

To make the students of the 2nd year of the Degree in Automation Engineering Control and Instrumentation of EST Setúbal learn the fundamental principles of measurement and have the capacity to understand the operation of the most used sensors in the measurement of position, displacement, speed, deformation, pressure and level.

Syllabus

1. Instrumentation and measurement units and systems
International System of Units (SI)
Concept of sensor, transducer and actuator
Static and dynamic characteristics of a measuring sensor
Normalized signals of current and pressure
Measurement errors: linearity, hysteresis, offset and gain.

2. Measuring transducers of physical quantities
Position, speed and acceleration (potentiometer, LVDT, LVDC, accelerometer and solve)
Force (extensometers, Hooke's law, Young's modulus and piezo resistors)
Magnetic Field (Hall Effect)
Optics (photoresistance, photodiode and phototransistor)
Tachometer generator and digital tachometer
Encoder (incremental and absolute)

3. Signal conditioning circuits
Wheatstone Bridge (b.C. and Co.)
Wheatstone bridge equilibrium condition (c.c. and c.a.)
Amplification and attenuation
Instrumentation Amplifiers
Transmitters (measurement chain)
Converters (voltage-current)

4. Pressure measurement
Pressure setting
Pressure units and conversions
Absolute, relative and differential pressure
Static, dynamic and total pressure
Barometers, pressure gauges, pressure switches
Liquid and Bourdon column manometer
Manometers of diaphragm (deformation of a membrane)
Load cells (ring and recessed)
Protection of pressure sensors: diaphragm, siphon, sealing
Calibration (dead weight scale)
Specification, selection and installation of pressure sensors

5. Level Measurement
Measurement methods:
Communicating vessel level
Floats and torsion level measurement
Hydrostatic pressure
Resistance
Capacity
Ultra sounds
RADAR
Radioactivity
Gravimetric
Measurement of net interfaces level
Density measurement (constant level)
Specification, selection and installation of level sensors

6. Pneumatic instrumentation
Nozzle system
Pneumatic relay or amplifier
Balance of forces and transmitters
P / I and I / P Converters
PID controller (principle of operation)
Compressors
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Demonstration of the syllabus coherence with the UC intended learning outcomes

The program contents of UC focus on the fundamental principles of measurement, namely on the methods and sensors most used in the measurement of position, displacement, velocity, deformation, pressure and level.

Teaching methodologies

The teaching method is based on the presentation of the subject by the teacher, in the resolution of problems and in the accomplishment of laboratory works, that cover the totality of the programmatic contents of the curricular unit.

Demonstration of the teaching methodologies coherence with the curricular unit's intended learning outcomes

Frequency of the laboratory component is obtained by executing and submitting the laboratory reports within 1 week after completion of the work (except for sporadic situations defined by the laboratory teacher). The evaluation of the theoretical-practical component is ensured by the final written evaluation of the course or by the average of 2 assessment tests, carried out in the course of the classes.
The final written examination of the course is held on the dates defined by the Pedagogical Council. This exam is without consultation and students will only be able to use a scientific calculating machine, without programming capabilities and without graphical capabilities.

Assessment methodologies and evidences

A avaliação escrita da componente teórico-prática tem um peso de 70% na nota final e é efectuada por exame final. A avaliação de laboratório (L) tem um peso de 30% na nota final. A classificação mínima em qualquer das componentes da avaliação, escrita ou laboratorial, é de 10 valores.
A classificação da componente laboratorial é individual, sendo função da preparação que o aluno efectua antes da realização dos trabalhos de laboratório e da classificação dos relatórios entregues no prazo estipulado para o efeito (máximo de 1 semana após execução do trabalho).
Em situações em que o corpo docente considere necessário, as classificações finais superiores a 16 valores poderão ser defendidas em provas orais. Caso o aluno não compareça a estas provas orais a sua classificação final será de 16 valores.
A nota final é calculada de acordo com a seguinte fórmula:
NF=0,7%EF + 0,3%L
EF- média dos 2 testes ou exame final
Está prevista a realização de problemas em sala de aula onde o desempenho do aluno é avaliado, sendo esse desempenho quantificado com um valor máximo de 20% relativamente à classificação máxima da componente TP.

Normas para a realização de provas:
• Quando solicitado, é obrigatória a apresentação de um documento de identificação durante as provas.
• Só se aceitam provas escritas em cadernos de teste/exame da EST Setúbal.
• O abandono da sala só pode efetuar-se 30 minutos depois do início do teste/exame e implica a entrega definitiva da prova, não podendo o atraso na entrada, em circunstância alguma, exceder 15 minutos.
• Durante as provas só poderão ser utilizadas máquinas de calcular com capacidades gráficas ou alfanuméricas se o docente o autorizar.
• Durante as provas não é permitido o manuseamento ou exibição de telemóveis (os quais deverão estar desligados) e de outros equipamentos eletrónicos, constituindo a utilização de qualquer um deste tipo de equipamentos motivo de anulação da prova.

Primary Bibliography

Observations

Frequency and passing in this course assumes that students have basic knowledge of electrotechnology and electronics.
(Omitted issues respect the legal legislation in force and the internal rules and regulations of the management bodies of ESTSetúbal / IPS).
Time of doubt:
4:00 p.m. 9: 00-10: 30

Planned dates of continuous assessment moments:
T1 - November 19, 2018;
T2 - January 18, 2019.