1. Mechanical Measurement & Metrology ME211
Nishith Parikh

2. Teaching Scheme M1 Tu, W, Thu – Lectures Mo/ Thu - Lab M230 50 M1
Tu, W, Thu – Lectures
Mo/ Thu - Lab M2
M, Tu, F– Lectures
Mo/ Tu- Lab

3. Teaching Scheme Tentatively Plan Continuous Examination – 30 Marks
10 Marks – Attendance
10 Marks – Minor Quiz I – MCQ (Unit 1)
10 marks – Minor Quiz II – MCQ (Unit 4 and Unit 5)
Mid Term Examination – 40 Marks ( Convert to 20 Marks)
Unit 1, 2 and 3
End Term Examination – 50 Marks
Unit 1, 2, 3, 4 and 5
Internal Evaluation – 20 Marks
Lab Submission
Lab Attendance
External Evaluation – 30 Marks
Practical Performance
Viva

4. Syllabus Sr No Unit Course Content Weightage (%) 1
Concept of Measurement
Definition, Need of Measurement, Methods of Measurement, Unit and Standards, Characteristics of Measuring Instruments, Accuracy and Precision, Static and Dynamic Characteristics of Measuring Instrument, Error in Measurements, Limit, Fit and Tolerances, Snap Gauges 10 2
Linear and Angular Measurement
Introduction, Surface Plate, V Blocks, Scaled Measurements, Vernier Measurements, Micrometer Measurements, Slip Gauges, Protractor, Sine bar, Angle Gauges, Spirit Level, Autocollimator, Comparators: Mechanical, Optical, Pneumatic, Electrical and electronics. 25 3
Form Measurement
Gear Terminology, Measurement of Gear Elements, Screw Thread Terminology, Measurement of Screw Thread Elements, Metrology of Surface Finish, Surface Metrology Concepts, Methods of Measuring Surface Finish.

5. Syllabus Sr No Unit Course Content Weightage (%) 4
Measurement of Mechanical Parameters
Measurement of Force, Measurement of Torque, Measurement of Strain, Methods of Measuring Temperature, Thermocouples, Pressure Measurement 25 5
Miscellaneous Metrology
Precision Instrumentation based on Laser Principles, Coordinate measuring machines: Structure, Modes of Operation of CMM, Optical Measuring Techniques: Tool Maker’s Microscope, Profile Projector, Machine Tool Metrology, Machine Vision. 15

6. Textbook
Engineering Metrology and Measurement, N V Raghavendra and Krishnamurthy, Oxford University Press,
Reference Books:
Engineering Metrology and Measurements, Bentley, Pearson Education
Theory and Design for Mechanical Measurements, 3rd Edition,
Richard S Figliola, Donald E Beasley, Wiley India
Metrology and Measurement, Anand Bewoor & Vinay Kulkarni McGraw-Hill

7. List of Experiments Performance on Linear Measurements
Performance on Angular Measurements
Measurements of Gear Elements By Using Gear Tooth Vernier.
Study of Surface Roughness
Measurement of Circularity / Roundness using Mechanical Comparator.
Force Measurement
Torque Measurement
Study of Temperature Measurement by thermocouple
Study and applications of Profile Projector
Study and applications of Tool Maker Microscope.

8. Unit 1: Concept of Measurement

9. Measurement
Procedure in which an unknown quantity is compared to a known standard, using an accepted and consistent system of units
The measurement may involve a simple linear rule to scale the length of a part
Or it may require a sophisticated measurement of force versus deflection during a tension test
Measurement provides a numerical value of the quantity of interest, within certain limits of accuracy and precision

10. Metrology
Metrology is the name given to the science of pure measurement.
Engineering Metrology is restricted to measurements of length & angle

11. Need of Measurement Establish standard Interchange ability
Customer Satisfaction
Validate the design
Physical parameter into meaningful number
True dimension
Evaluate the Performance

12. Methods of Measurement
Direct method
Indirect method
Comparative method
Coincidence method
Contact method
Deflection method
Complementary method

13. Direct method Measurements are directly obtained
 Ex: Vernier Caliper, Scales

14. Indirect method Obtained by measuring other quantities
Ex : Weight = Length x Breadth x Height x Density

15. Comparative Method It’s compared with other known value
 Ex: Comparators

16. Coincidence method
Measurements coincide with certain lines and signals
Fundamental method
Measuring a quantity directly in related with the definition of that quantity
Contact method
Sensor/Measuring tip touch the surface area

17. Complementary method
The value of quantity to be measured is combined with known value of the same quantity
Ex:Volume determination by liquid displacement

18. Deflection method
The value to be measured is directly indicated by a deflection of pointer
Ex: Pressure Measurement