JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives:

• To understand the working principle and design of various analog signal conditioning circuits used in industrial applications.
• To impart knowledge on the design of signal conditioning circuits
• To impart the knowledge of various measurement methods of physical parameters like velocity, acceleration, torque, pressure, flow, temperature etc. and their relevance to Industry.

Course Outcomes

On successful completion of this course the students should be able to;

• Understand principle of working of various signal conditioners used with Temperature, Displacement, optical and various miscellaneous other sensors.
• Design signal conditioning circuits for various transducers.
• Understand applications of various signal conditioners used in industry.
• Capable of selecting best suited signal conditioners for any given application.

UNIT - I

Signal Conditioning for Resistive Sensors: Measurement of Resistance, Voltage Dividers Wheatstone Bridge: Balance Measurements, Detection Measurements, Differential and Instrumentation Amplifiers, Interference. Signal Conditioning for Self-Generating Sensors: Chopper and Low-Drift Amplifiers, Electrometer and Transimpedance Amplifiers, Charge Amplifiers, Noise in Amplifiers, Noise and Drift in Resistors.

UNIT - II

Temperature Sensors Interfacing: Thermo Switches, Thermocouples Interfacing – Thermo switches, Ambient Referenced Thermocouples, Isolated Thermocouple Measurement, Thermocouple to Frequency, Thermocouple to 4to20 m A Temperature Transmitter, Isolated Multiplexing of Thermocouples RTD‟s Interfacing - Single Op Amp Interface, using a Signal Conditioner, Bridge configuration using 3wire RTD, Linearizing RTD Circuits, Current Transmitters for RTD Outputs, RTD Based Precision controller

UNIT - III

Semiconductor Temperature sensors Interfacing Thermistor Interfacing - Simple Interface Circuits, High-resolution Differential Thermometer, Current Transmitters, Thermistor to Frequency Conversion T to F Conversion using Diodes, Absolute Temperature to current Conversion, Temperature Control Circuits, Multiplexed Applications, Isolation, 4to20 m A Current Transmission

UNIT - IV

Pressure and Force Transducers Interfacing Pressure Transducer Interfacing - Strain Gauge Based Transducers, Potentiometer to Frequency Transducer, Interfacing High level Semiconductor Transducers, Isolated Pressure Transmitter, Pressure Control System Force Transducer Interfacing - Spring Driven Rheostat, Strain gauge & Signal Conditioner, High Resolution Load Cell Platform, Interface, Strain Gauge to Frequency Conversion, Isolators & Transmitters

UNIT - V

Flow meters and Level Transducers Interfacing Flow Meter Interfacing - Differential Pressure Flow meters, Frequency output Flowmeters, Anemometers, Hinged Vane, Flowmeter, Thermal Flow Meter,

R19 M.TECH EIE

Transmission & Readout level Transducers Interfacing - Float & Potentiometer, Optical Sensing & Thermal Sensing

TEXT BOOKS:

• 1. Raman Pallas Areny, John G. Webster, Sensors and Signal Conditioning, second edition, John Wiley and Sons (I,II UNITS)
• 2. Transducer Interfacing Handbook A Guide to Analog Signal Conditioning, Edited by Daniel H Sheingold Analog Devices Publications. (III, IV, V, VI UNITS)

REFERENCES:

• 1. Op Amp Applications Handbook, Walt Jung, Editor, Elsevier
• 2. Robert B. Northrop, Introduction to Instrumentation and measurement-second edition- Taylor &Francis group R19 M.TECH EIE M.TECH.- I YEAR- I SEMESTER ELECTRONICS AND INSTRUMENTATION ENGINEERING