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UNIT - 1
Introduction to measurement system
o Elements of measurement system
o Block diagram of measurement system
o Performance of measurement system
Sensors and transducers
o Terminology
o Difference between sensor and actuators
o Advantages of transducer
Characteristics of measuring devices
o Accuracy & precision
o Various types of errors
o Hysteresis & linearity
o Resolution and scale readability
o Threshold
o Repeatability, reliability & maintainability
o Span & dynamic accuracy
Classification of transducers
Basic requirement of transducers
Displacement measurement using potentiometer
o Definition of vibration
o Characteristics of vibration
o Why to measure vibration
o Selection of measurement type for vibration
measurement
Speed and vibration measurement
o Tachometer (AC & DC Type)
o Accelerometer
Advantages & Disadvantages
Piezo-electric type
Inductive proximity type
o Velocity Sensor
Electromagnetic type
Strain gauge
o Principle, Measuring circuit & Properties
o Numerical
LVDT
o Principle
o Types : Unguided armature, Captive armature,
Spring extended armature
o Applications
o Derivations
Capacitive transducers
Piezo-electric transducer
o Material
o Application
o Principle
o Piezo-electric accelerometer
Hall effect transducers
o Current measurement
o Magnetic flux measurement
o Displacement sensor
Resistance thermometer
o Circuit Diagram
o Principle of Operation
Thermisters
Thermocouple
Pyrometer
o Black body
o Temperature measurement by radiation
o Fixed Focus radiation pyrometer
o Variable focus radiation pyrometer
Flow transducer
o Electromagnetic flow meter
o Ultrasonic flow meter
o Vortex flow meter
o Coriolis flow meter
Unit – 2
Data Acquisition System (DAS)
o Purpose
o Building blocks of a typical data acquisition
system
o Application
Signal conditioning of inputs
o Requirement of signal conditioning
o Function of signal conditioning
o Components of signal conditioning block
Configuration of DAS
(Factors which decide the configuration)
Types of DAS
o Single channel
o Multi channel
Data conversion
Analog to Digital Conversion (ADC)
o What is ADC?
o Sample & hold circuit
o Quantizing and encoding
o Accuracy of ADC
o Types of ADC
Single slop and dual slop ADC
Successive approximation ADC
Flash ADC
o Comparison of ADCs
o Numerical
Digital to Analog Conversion (DAC)
o Introduction
o Types of DAC
Binary weighted DAC
R-2R network based DAC
o Derivations
o Numerical
Telemetry system (Follow the notes uploaded in
Google drive)
o Introduction and requirement of telemetry
o Element of telemetry system
o Types of signal transmission media
o Classification of telemetry
Based on signal transmission medium
Based on modulations techniques
Based on type of information signal
Based on no. of channels
o Examples of telemetry systems
Direct current telemetry system
Frequency modulation telemetry system
Pulse width modulation telemetry system
Pulse code modulation telemetry system
Data communication protocols
Introduction & requirement
RS-232
RS-485
MODBUS
