OBJECTIVES: The student should be made to:
Understand the purpose of measurement, the methods of measurements, errors associated with measurements.
Know the principle of transduction, classifications and the characteristics of different transducers
Know the different bridges for measurement.
Know the different display and recording devices.
UNIT I SCIENCE OF MEASUREMENT 6+6
Measurement System – Instrumentation – Classification and Characteristics of Transducers – Static and Dynamic – Errors in Measurements and their statistical analysis – Calibration – Primary and secondary standards.
UNIT II DISPLACEMENT, PRESSURE, TEMPERATURE SENSORS
6+6 Strain Gauge: Gauge factor, sensing elements, configuration, and unbounded strain gage. Capacitive transducer – various arrangements, Inductive transducer, LVDT, Passive types: RTD materials & range, relative resistance vs. temperature characteristics, thermistor characteristics, Active type: Thermocouple – characteristics.
UNIT III PHOTOELECTRIC AND PIEZO ELECTRIC SENSORS 6+6
Phototube, scintillation counter, photo multiplier tube (PMT), photovoltaic, photo conductive cells, photo diodes, phototransistor, comparison of photoelectric transducers. Optical displacement sensors and optical encoders. Piezoelectric active transducer- Equivalent circuit and its characteristics.
UNIT IV SIGNAL CONDITIONING CIRCUITS 6+6
Functions of signal conditioning circuits, Preamplifiers, Concepts of passive filters, Impedance matching circuits, AC and DC Bridges – wheat stone bridge, Kelvin, Maxwell, Hay, Schering UNIT V DISPLAY AND RECORDING DEVICES 6+6 Digital voltmeter – Multi meter – CRO – block diagram, CRT – vertical & horizontal deflection system, DSO, LCD monitor, PMMC writing systems, servo recorders, photographic recorder, magnetic tape recorder, Inkjet recorder, thermal recorder.
LIST OF LABORATORY EXPERIMENTS TO DEMONSTRATE:
- Characteristics of various temperature sensors – RTD, Thermistor and Thermocouple
- Displacement measurement using LVDT.
- Characteristics of various light sensors – LDR, Photodiode and Phototransistor
- Measurement of resistance using DC bridges
- Measurement of inductance using Maxwell bridge
- Measurement of capacitance using Schering bridge
- Measurement of amplitude, time, frequency using CRO
TOTAL: 60 PERIODS
- Upon completion of the course, the student should be able to:
Measure various electrical parameters with accuracy, precision, resolution.
Select appropriate passive or active transducers for measurement of physical phenomenon.
Select appropriate light sensors for measurement of physical phenomenon.
Use AC and DC bridges for relevant parameter measurement.
Employ Multimeter, CRO and different types of recorders for appropriate measurement.
- A.K.Sawhney, ―Electrical & Electronics Measurement and Instrumentation‖,10th edition, DhanpatRai& Co, New Delhi, 19th Revised edition 2011, Reprint 2014. 2. John G. Webster, ―Medical Instrumentation Application and Design‖, 4th edition, Wiley India Pvt Ltd,New Delhi, 2015.
- Ernest O Doebelin and Dhanesh N Manik, Measurement systems, Application and design, 6th edition, McGraw-Hill, 2012.
- Khandpur R.S, ―Handbook of Biomedical Instrumentation‖, 3rdedition,Tata McGraw-Hill, New Delhi, 2014.
- Leslie Cromwell, ―Biomedical Instrumentation and measurement‖, 2nd edition, Prentice hall of India, New Delhi, 2015.
- Albert D.Helfrick and William D. Cooper. Modern Electronic Instrumentation and Measurement Techniques‖, Prentice Hall of India, 1stedition, 2016