SENSORS AND TRANSDUCERS
Group A
Functional description of instrumentation systems. Performance characteristics-static and dynamic, time and frequency responses.
Electrical passive transducers. Hot wire anemometers and associated circuit, LVDT and phase-sensitive detection, variable reluctance type transducers and associated circuits. Capacitive microphone and associated circuits.
Magnetostrictive transducers: Magnetostrictive materials and their application to measurement of force. Hall transducers: principles and applications.
Thermocouple, semiconductor-type temperature sensors.
Piezoelectric transducers: Piezoelectric crystal and its properties, sensitive coefficie~1tS, ferroelectric materials. bimorph, charge amplifiers, measurement of force.
Group B
Signal conditioning: Push-pull arrangement and reduction of non-linearity. Linearizing circuits and their applications. Differential amplifiers, instrumentation amplifiers, logarithmic amplifiers. Sources of noise and
their reduction, grounding and shielding techniques.
Special transducers: Digital shaft encoders. DC and AC tachogenerators, synchros.
Actuators and servos: DC and AC servomotors, step motors. Elastic transducers: Springs bellows, diaphragms, Bourdon tubes-their characteristics and applications, combination of elastic and electrical transducers.
Pneumatic sensors.
Recommended Books
• E O Doebelin. Measurement SysIems:Application and
Design. McGraw-Hili International.
• D Patranabis. Sensors and Transducers. S. Chand & Co.
Ltd., New Delhi.
• D VSMurthy. Transducersand Instrumentation. Prentice-
Hall of India (P) Ltd., New Delhi.