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Metrology- Mechanical Engineering

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Self-paced Beginner

Metrology- Mechanical Engineering

4(1580)
21 enrolled
1531 views
FREE
2172 min
Anytime
English
1531 views
Team EveryEng
Team EveryEngMechanical Engineering
AerospaceAutomotive
  • Lifetime access
  • Certificate of completion
  • Foundational Learning
  • Access to Study Materials
Volume pricing for groups of 5+

Why enroll

Unlock the precision and accuracy your industry demands! Enroll in the Metrology NPTEL course to master the science of measurement and gain a competitive edge. Learn from leading experts and gain hands-on experience with cutting-edge measurement techniques and instruments. Boost your skills in quality control, inspection, and manufacturing, and stay ahead in the rapidly evolving industry landscape. Join the Metrology NPTEL course and measure up to excellence!.

Your instructor

Team EveryEng

Team EveryEng

Engineer

Mechanical Engineering

22+ yrs experience·India

159Courses
43Articles
4.8kLearners
4Avg rating
74Followers

Is this course for you?

You should take this if

  • You work in Aerospace or Automotive
  • You're a Mechanical Engineering professional
  • You prefer self-paced learning you can revisit

You should skip if

  • You need a different specialisation outside Mechanical Engineering
  • You need live interaction with an instructor

Course details

Metrology is the science of measurement, and it plays a crucial role in Mechanical Engineering. This course covers the fundamental principles and techniques of measurement, including:

1. Measurement systems: Types of measurement systems, units, and standards.

2. Instruments and tools: Calipers, micrometers, dial indicators, and other precision instruments.

3. Dimensional measurement: Measurement of length, width, height, and angular dimensions.

4. Geometric tolerancing: Understanding geometric tolerances, datums, and tolerancing schemes.

5. Surface finish measurement: Methods for measuring surface roughness and waviness.

6. Coordinate measuring machines: Principles and applications of CMMs.

7. Measurement uncertainty: Understanding and calculating measurement uncertainty.

8. Quality control: Applications of metrology in quality control and inspection.

Learning Outcomes:

- Understand the fundamental principles of measurement and metrology.

- Familiarize with various measurement instruments and tools.

- Learn to measure and calculate dimensional and geometric tolerances.

- Understand surface finish measurement and its significance.

- Apply metrology principles in quality control and inspection..

Source: nptelhrd (Youtube Channel)
Prof. Dr. Kanakuppi Sadashivappa, IIT- Madras

Course suitable for

Key topics covered

  • Introduction to metrology

  • Metrology terminologies

  • Measurement errors

  • Linear measuring instruments – 1 (Angle plate, steel rule, spring calipers)

  • Linear measuring instruments – 2 (Combination set, Vernier calipers)

  • Linear measuring instruments – 3 (Height gauge, Micrometers – 1)

  • Linear measuring instruments – 4 (Micrometers – 2, Bore gauge)

  • Linear measuring instruments – 5 (Dial indicators, thickness gauges, depth gauges)

  • Manufacturing tolerances and fits

  • Terminologies of limits fits and tolerances

  • Numerical problems on fit and tolerances

  • Selection of fits, Geometrical tolerances

  • Positional tolerances

  • Limit gauging

  • Design of limit gauges

  • Measurement of straightness, flatness and squareness

  • Perpendicularity measurement

  • Basics of surface roughness

  • Surface finish parameters

  • Stylus type surface finish measuring instruments

  • Non-contact type surface finish measuring instruments

  • Screw thread production and terminology

  • Measurement of screw thread elements

  • Introduction to gears

  • Angle measurement

  • Radius measurement,Contact angle measurement

  • Basics of interferometry

  • Interferometers

  • Introduction to comparators, Mechanical comparators

  • Electrical and electronic comparators, Optical comparators

  • Pneumatic comparators

  • Geometrical tests on lathe

  • Geometrical tests on pillar type drilling machine

  • Universal measuring machine (UMM) and Coordinate measuring machine (CMM)

  • CMM probes and CMM software

  • Feature measurement using CMM, Laser vision

  • In-process gauging and control

  • Stage position metrology

  • Micro and Nano stages, Nano technology instrumentation

  • Optical system design

  • Complex opto- mechanical assemblies,Metrology testing and certification services

Course content

The course is readily available, allowing learners to start and complete it at their own pace.

43 lectures36 hr 12 min
  1. Introduction to metrology
    43 min
  2. Metrology terminologies
    43 min
  3. Measurement errors
    47 min
  4. Linear measuring instruments – 1 (Angle plate, steel rule, spring calipers)
    33 min
  5. Linear measuring instruments – 2 (Combination set, Vernier calipers)
    41 min
  6. Linear measuring instruments – 3 (Height gauge, Micrometers – 1)
    48 min
  7. Linear measuring instruments – 4 (Micrometers – 2, Bore gauge)
    44 min
  8. Linear measuring instruments – 5 (Dial indicators, thickness gauges, depth gauges)
    37 min
  9. Manufacturing tolerances and fits
    48 min
  10. Terminologies of limits fits and tolerances
    41 min
  11. Numerical problems on fit and tolerances
    43 min
  12. Selection of fits, Geometrical tolerances
    49 min
  13. Positional tolerances
    43 min
  14. Limit gauging - 1
    41 min
  15. Limit gauging - 2
    51 min
  16. Design of limit gauges
    29 min
  17. Measurement of straightness, flatness and squareness
    46 min
  18. Perpendicularity measurement
    52 min
  19. Basics of surface roughness
    49 min
  20. Surface finish parameters
    47 min
  21. Stylus type surface finish measuring instruments
    59 min
  22. Non-contact type surface finish measuring instruments
    73 min
  23. Screw thread production and terminology
    52 min
  24. Measurement of screw thread elements
    76 min
  25. Introduction to gears
    52 min
  26. Angle measurement - 1
    54 min
  27. Angle measurement - 2
    55 min
  28. Radius measurement,Contact angle measurement
    54 min
  29. Basics of interferometry
    53 min
  30. Interferometers
    42 min
  31. Introduction to comparators, Mechanical comparators
    46 min
  32. Electrical and electronic comparators, Optical comparators
    55 min
  33. Pneumatic comparators
    52 min
  34. Geometrical tests on lathe
    54 min
  35. Geometrical tests on pillar type drilling machine
    46 min
  36. Universal measuring machine (UMM) and Coordinate measuring machine (CMM)
    62 min
  37. CMM probes and CMM software
    60 min
  38. Feature measurement using CMM, Laser vision
    60 min
  39. In-process gauging and control
    51 min
  40. Stage position metrology
    63 min
  41. Micro and Nano stages, Nano technology instrumentation
    59 min
  42. Optical system design
    59 min
  43. Complex opto- mechanical assemblies,Metrology testing and certification services
    60 min

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Questions and Answers

A: More force elastically distorts the frame and drives additional positive bias into the readings. Software offsets hide the thermal error and contaminate traceability back to the gauge R&R. Full calibration is overkill here and creates unnecessary containment without addressing temperature equilibration. Thermal stabilization followed by re-zero removes the temperature-driven frame growth that caused the drift.

A: Cosine error would show a consistent bias tied to setup angle rather than scatter. Excess preload usually creates a directional bias and sticky return, not random spread. Thermal growth moves the mean with temperature and settles once stable. Worn gearing produces lost motion that shows up as poor repeatability with little mean shift.

A: Linear addition overstates uncertainty and can falsely drive a gauge out of suitability. Treating bias as rectangular without justification misrepresents its statistical nature here. Rounding to a dominant term drops part of the variance and breaks uncertainty propagation rules. Root-sum-square correctly combines independent standard uncertainties.

A: More data just captures more vibration-induced scatter without removing the source. Plate material change alone doesn’t address transmitted energy from the floor. Software smoothing hides the problem and breaks real-time detection. Mechanical isolation removes the excitation that corrupts the measurement.