ME2304 ENGINEERING METROLOGY AND MEASUREMENTS
UNIT I CONCEPT OF MEASUREMENT
General concept – Generalised measurement system-Units and standards-measuring
instruments: sensitivity, stability, range, accuracy and precision-static and dynamic
response-repeatability-systematic and random errors-correction, calibration -
Introduction to Dimensional and Geometric Toleranceing - interchangeability,
UNIT II LINEAR AND ANGULAR MEASUREMENT
Definition of metrology-Linear measuring instruments: Vernier, micrometer, Slip gauges
and classification, - Tool Makers Microscope - interferometery, optical flats, -
Comparators: limit gauges Mechanical, pneumatic and electrical comparators,
applications. Angular measurements: -Sine bar, Sine center, bevel protractor and angle
Decker..
UNIT III FORM MEASUREMENT
Measurement of screw threads: Thread gauges, floating carriage micrometermeasurement
of gear tooth thickness: constant chord and base tangent method-Gleason
gear testing machine – radius measurements-surface finish: equipment and parameters,
straightness, flatness and roundness measurements.
of gear tooth thickness: constant chord and base tangent method-Gleason
gear testing machine – radius measurements-surface finish: equipment and parameters,
straightness, flatness and roundness measurements.
UNIT IV LASER AND ADVANCES IN METROLOGY
Precision instruments based on laser-Principles- laser interferometer-application in
measurements and machine tool metrology- Coordinate measuring machine (CMM):
need, construction, types, applications.- computer aided inspection.
measurements and machine tool metrology- Coordinate measuring machine (CMM):
need, construction, types, applications.- computer aided inspection.
UNIT V MEASUREMENT OF MECHANICAL PARAMETERS
Force, torque, power:-mechanical, pneumatic, hydraulic and electrical type-Pressure
measurement - Flow: Venturi, orifice, rotameter, pitot tube –Temperature: bimetallic
strip, thermocouples, pyrometer, electrical resistance thermistor.
TEXT BOOKS
1. Jain R.K., “Engineering Metrology”, Khanna Publishers, 2005
2. Alan S. Morris, “The Essence of Measurement”, Prentice Hall of India, 1997
REFERENCES
1. Gupta S.C, “Engineering Metrology”, Dhanpat rai Publications, 2005
2. Jayal A.K, “Instrumentation and Mechanical Measurements”, Galgotia Publications 2000
3. Beckwith, Marangoni, Lienhard, “Mechanical Measurements”, Pearson Education, 2006.
4. Donald Deckman, “Industrial Instrumentation”, Wiley Eastern, 1985.
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