Sensors and Signal Conditioning — Summer 2018

Explain the operations of ‘multiplexing’ and ‘demultiplexing’ and indicate their application in instrumentation.

Explain active electric filter. Explain one of each with draw necessary circuit diagram and calculation.

Explain eddy current type inductive transducer in detail.

Explain reference electrode for PH measurement with neat sketch.

Explain digital tachometer in detail

Explain in detail the Magnetostrictive phenomenon and magnetosrictive force transducer.

Define following: (1) Accuracy and Precision (2) Resolution (3) Fidelity (4) Saturation (5) Calibration (6) Dead zone (7) Bandwidth.

What are data acquisition systems and what is their role in the field of instrumentation with necessary block diagram

What is meant by cold junction compensation and how is it effected in industrial environment

Draw a circuit of a Schmitt trigger and suggest its applications.

Explain the techniques of obtaining direct and indirect Frequency modulation.

Explain Hall effect and suggest it application

Show how capacitive transducers can be used to monitor the thickness of insulating sheer in motion, without making physical contact and discuss on the sensitivity and linearity of the system

Explain Briefly the techniques adopted for measurement of time interval, showing how it is indicated

Discuss the basic principle of hot wire resistance sensor. Explain hot wire Anemometry and its role in the measurement of gas flow rates in closed pipes.

Discuss the role of op-amp as a comparator. Also discuss the function of ZCD (Zero Crossing Detector) and Schmitt trigger with neat circuit diagram and input- output waveform.

Discuss the role of data logger. Describe different stages of data logger with its internal block diagram.