Measurement and Instrumentation
 
 
Subject Code: EME2066
Aim of Subject: To introduce the students to measurement and instrumentation techniques in mechanical engineering.
Learning Outcome of Subject: At the completion of the subject, students should be able to :
  • Select a suitable instrument to measure physical quantities such as pressure, flow, temperature etc.
  • Analysis the experimental data.
  • Understand the governing principle of broad range of instruments.
  • Undertake, under supervision, laboratory experiments to study the measurement of voltage and vibration.
Programme Outcomes:
  • Ability to acquire and apply fundamental principles of science and engineering(50%)
  • Capability to communicate effectively(10%)
  • Acquisition of technical competence in specialised areas of engineering discipline(10%)
  • Ability to identify, formulate and model problems and find engineering solutions based on a systems approach(15%)
  • Understanding and commitment to professional and ethical responsibilities(5%)
  • Ability to work independently as well as with others in a team(5%)
  • Capability and enthusiasm for self-improvement through continuous professional development and life-long learning(5%)
Assessment Scheme:
  • Lab Experiments - work in groups, lab report writing, oral assessment at the end of lab (10%)
  • Tutorial / Assignment - group assignment,focus group discussion at tutorial,to enhance understanding of basic concepts in lecture(15%)
  • Test Quiz - written exam (15%)
  • Final Exam - written exam (60%)
Teaching and Learning Activities: 51 hours (lectures,tutorials and laboratory experiment)
Credit Hours: 3
Pre-Requisite: EET1156: Basic Electrical Technology   or  EET1166: Electrical Technology I
References:
  • J. P. Holman, "Experimental Methods for Engineers", McGraw-Hill International Edition. (Textbook)
  • C. D. Johnson, "Process Control and Instrumentation Technology", Prentice Hall, Seventh Edition.

Subject Contents

  • Basic Concepts and Analysis of Data (6 hours)
    Standards, Dimension and Units, Generalized measurement system, Basic Concept of Dynamic Measurement, sensor dynamics, dynamic system response, distortion, Error in experimental data, Uncertainty Analysis, statistical methods of analysis for modeling uncertainty, regression schemes for modeling of data and methods of graphical analysis and representation.
     
  • Basic Electrical Measurement and Sensing Devices (8 hours)
    Measurement devices: Electromagnetic force, waveform measures, Basic analog and digital meters, input circuits, amplifier (differential and operational), transformers, power supplies, signal conditioning and Electronic / digital voltmeters, Oscilloscopes. Sensing devices: Transducers, differential transformers (LVDT), capacitive / peizoelectric transducers, photoelectric effect, photoconductive transducer, photovoltaic cells, ionization transducer, magnetometer search coil and hall effect transducer.
     
  • Measurement Pressure (6 hours)
    Mechanical devices, dead-weight tester, bourdon-tube gauge, diaphragm and bellows gauge, bridgman gauge, McLeod gauge and Knudsen gauge.
     
  • Flow Measurement (8 hours)
    Positive-displacement method, flow-obstruction methods, sonic nozzle, flow measurement by drag effect, hot-wire and hot-film anemometers, magnetic flow meters, LDA, other methods of flow measurement.
     
  • Measurement of Temperature, Thermal and Property Measurements (6 hours)
    Ideal gas thermometer, measurement through mechanical effects, by electrical effects, through radiation, effect of heat transfer on temperature measurement. Thermal conductivity of measurements, thermal conductivity of liquids and gases, measurement of viscosity, gas diffusion, calorimeter, convection heat-transfer measurements, heat-flux meters, pH measurements
     
  • Force, Torque, Strain, Motion and Vibration Measurement (8 hours)
    Mass balance measurement, Elastic elements for force measurement, torque measurement, stress and strain, strain measurements, electrical resistance strain gauges and their measurement. Simple vibration instruments, principles of seismic instruments and sound measurement. Accelerometer, basic dynamic model, dynamic range, resonant frequency, roll off rate, other characteristics and applications.
     

Laboratory

1. Measurement of Voltage and Phase Angle Using CRO.
2. Vibration Measurement