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Instrumentation

Code:

ARCI08

Sigla:

INSTR

Áreas Científicas
Classificação	Área Científica
CNAEF	Electronics and automation

Ocorrência: 2023/2024 - 2S

Ativa?	Yes
Unidade Responsável:	Departamento de Sistemas e Informática
Curso/CE Responsável:	Automation, Robotics and Industrial Control

Ciclos de Estudo/Cursos

Sigla	Nº de Estudantes	Plano de Estudos	Anos Curriculares	Créditos UCN	Créditos ECTS	Horas de Contacto	Horas Totais
ARCIL	23	Plano de Estudos_2015_16	1	-	6	60	162
TSPARC	27	Plano de Estudos_2015_16	1	-	6	60	162

Língua de trabalho

Portuguese

Objetivos

Provide students with skills to:
1) have general knowledge of physics directly involved in the principles and techniques of instrumentation
2) have basic knowledge of metrology, namely the concepts of accuracy, sensitivity, resolution and uncertainty, and their application in the areas of instrumentation and measurement;
3) understand the operating principles of analogue and digital measuring instruments, as well as identify the main characteristics and limitations of the measurement;
4) know the principle of operation of measurement transducers and be able to design circuits for measuring industrial quantities.

Resultados de aprendizagem e competências

Skills in the following areas: metrology (general), analogue and digital instrumentation, use of transducers for industrial measurement applications.

Modo de trabalho

Presencial

Pré-requisitos (conhecimentos prévios) e co-requisitos (conhecimentos simultâneos)

Students must have prior knowledge of physics, with special emphasis on electrical engineering and basic electronics.

Programa

1 - Instrumentation and measurement units and systems
International System of Units (SI); Concept of sensor, transducer and actuator; Static and dynamic characteristics of a measurement sensor and measurement chain; Normalized current and pressure signals; Measurement errors: linearity, hysteresis, offset and gain. Density concept; mass and volumetric weight.

2 - Transducers for measuring physical quantities

Position, velocity and acceleration (potentiometer, LVDT, LVDC, accelerometer and resolver); Strength (extensometers, Hooke's law, Young's modulus and piezoresistors); Magnetic field (Hall effect); Optical (photoresistance, photodiode and phototransistor); Tachymeter generator and digital tachymeter; Encoder (incremental and absolute)

3- Signal conditioning circuits

Wheatstone Bridge; Equilibrium condition of the Wheatstone bridge (d.c. and a.c.); Amplification and attenuation concepts; instrumentation amplifiers; Transmitters (measurement chain)

4- Pressure measurement

Definition of pressure; Pressure units and conversions; Absolute, relative and differential pressure; Static, dynamic and total pressure.

Barometers, manometers, pressure switches; Liquid column and Bourdon manometer; Diaphragm pressure gauges (diaphragm deformation); Load cells (ring and recessed); Protection of pressure sensors: diaphragm, siphon, sealing; Calibration Concepts (dead weight scale); Specification, selection and installation of pressure sensors.

5 - Level Measurement

Measurement methods:

Level of communicating vessels; Floats and level measurement by torsion; Hydrostatic pressure measurement principles by Resistance (piezoresistive) Capacity. Ultrasounds; Radar (free and guided wave); Radioactivity; Gravimetric.
Level measurement of liquid interfaces; Density measurement (constant level). Specification, selection and installation of level sensors

6 - Pneumatic instrumentation

Nozzle-reed system; Pneumatic relay or amplifier; Balance of forces and transmitters; P/I and I/P converters

Bibliografia Obrigatória

Daily Rley McConnel; Engineering Measurements, Wiley; Enginneerng Measurements. ISBN: 972-8431-22-8

Métodos de ensino e atividades de aprendizagem

The teaching methodology is based on expository theoretical-practical classes and classroom practice.

Tipo de avaliação

Distributed evaluation with final exam

Componentes de Avaliação

Designation	Peso (%)
Participação presencial	20,00
Teste	80,00
Total:	100,00

Componentes de Ocupação

Designation	Tempo (Horas)
Estudo autónomo	50,00
Frequência das aulas	90,00
Total:	140,00

Obtenção de frequência

The minimum grade in the continuous evaluation by tests is 8 values in any of the (two) tests.
In situations where the teaching staff deems it necessary, final grades greater than 16 may be defended in oral tests. If the student does not attend these oral tests, his final classification will be 16 points.

Once approved in continuous assessment, the student will only be able to improve the grade during the appeal period.
Rules for conducting tests:
• When requested, it is mandatory to present an identification document during the tests.
• Only tests written in EST Setúbal test/exam notebooks are accepted.
• Leaving the room can only be done 30 minutes after the start of the test/exam and implies the final delivery of the test, and the delay in entry cannot, under any circumstances, exceed 15 minutes.
• Calculating machines with graphic or alphanumeric capabilities can only be used during the tests if the teacher authorizes it.
• During the tests it is not allowed to handle or display mobile phones (which must be turned off) and other electronic equipment, constituting the use of any of this type of equipment as reason for the cancellation of the test.

Fórmula de cálculo da classificação final

The final grade is calculated according to the following formula:
NF=0.9*EF+0.1*DSA;
EF- average classification of the 2 tests or the classification in the final exam;

DSA- performance in the classroom.

In the case of evaluation by exam, the note of the PE component corresponds to the classification obtained in this test.

Improvement of the final classification distributed
The student can improve his final grade obtained by continuous assessment by taking the exam.