JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Pre-requisites

Physics, Mathematics

Course Objectives:

• 1. To provide basic knowledge in transduction principles, sensors and transducer technology and measurement systems.
• 2. To provide better familiarity with the Theoretical and Practical concepts of Transducers.
• 3. To provide familiarity with different sensors and their application in real life.
• 4. To provide the knowledge of various measurement methods of physical and electrical parameters

Course Outcomes:

• 1. After completion of the course the student is able to:
• 2. Identify suitable sensors and transducers for real time applications.
• 3. Translate theoretical concepts into working models.
• 4. Design the experimental applications to engineering modules and practices.
• 5. Design engineering solution to the Industry/Society needs and develop products.

UNIT - I

Introduction to measurement systems General concepts and terminology, measurement systems, sensor classifications: Analog Input and Output, Digital Input and Output, general input-output configuration, methods of correction. Passive Sensors Resistive Sensors: Potentiometers, Strain Gages, Resistive Temperature Detectors (RTDs), Thermistors, Light-dependent Resistors (LDRs), Resistive Hygrometers. Capacitive Sensors: Variable capacitor and Differential capacitor. Inductive Sensors: Reluctance variation sensors, Eddy current sensors, Linear variable differential transformers (LVDTs), Magneto elastic sensors, Electromagnetic sensors - Sensors based on Faraday’s law of Electromagnetic induction, Touch Sensors: Capacitive, Resistive, Proximity Sensors.

UNIT - II

Self-generating Sensors or active sensors Thermoelectric Sensors: Thermocouples, Thermo electric effects, Common thermocouples, Practical thermocouple laws, Cold junction compensation in thermocouples circuits. Piezoelectric Sensors: Piezoelectric effect, piezoelectric materials, applications.

UNIT - III

VELOCITY AND ACCELERATION MEASUREMENT Relative velocity – Translational and Rotational velocity measurements – Revolution counters and Timers - Magnetic and Photoelectric pulse counting stroboscopic methods. Accelerometers-different types, Gyroscopes-applications. Density measurements – Strain Gauge load cell method – Buoyancy method - Air pressure balance method – Gamma ray method – Vibrating probe method.

UNIT - IV

DENSITY, VISCOSITY AND OTHER MEASUREMENTS Units of Viscosity, specific gravity scales used in Petroleum Industries, Different Methods of measuring consistency and Viscosity –Two float viscorator –Industrial consistency meter. Sound-Level Meters, Microphones, Humidity Measurement

UNIT - V

CALIBRATION AND INTERFACING Calibration using Master Sensors, Interfacing of Force, Pressure, Velocity, Acceleration, Flow, Density and Viscosity Sensors, Variable Frequency Drive

TEXT BOOKS:

• 1. Measurement Systems – Applications and Design – by Doeblin E.O., 4/e, McGraw Hill International, 1990.
• 2. Principles of Industrial Instrumentation – Patranabis D. TMH. End edition 1997

REFERENCES:

• 1. Sensors and Transducers: D. Patranabis, TMH 2003
• 2. Wiley & Sons Ltd. (2006).
• 3. Sensor Technology Hand Book – Jon Wilson, Newne 2004.
• 4. Instrument Transducers – An Introduction to their Performance and design – by Herman K.P. Neubrat, Oxford University Press.
• 5. Measurement system: Applications and Design – by E. O. Doeblin, McGraw Hill Publications.
• 6. Electronic Instrumentation by H. S. Kalsi.