MECHANICAL MEASUREMENTS AND METROLOGY
Subject Title : Mechanical measurements and metrology
Subject Code : M-
Hours Per Week : 04
Hours Per Semester : 64
TOPIC ANALYSIS
SL.No
|
Major Topics
|
Hours Allotted
|
Weightage of Marks
|
SECTION-I
|
|||
1
|
Introduction to
measurements
|
06
|
16
|
2
|
Measuring
instruments
|
08
|
21
|
3
|
Limits, fits and Tolerance
|
06
|
16
|
SECTION-II
|
|||
4
|
Machine tool metrology
|
06
|
16
|
5
|
Transducers and strain gauges |
08
|
20
|
6
|
Measurement of
force, torque and pressure
|
08
|
20
|
SECTTION-III
|
|||
7
|
Applied mechanical
measurements
|
08
|
20
|
8
|
Miscellaneous
measurement
|
06
|
16
|
9
|
Industry innovations
|
05
|
-
|
10
|
Tests
|
03
|
-
|
Total
|
64
|
145
|
|
OBJECTIVES
On the completion of the course the
students should be able to:
1. Understand the principle of operation
and calibration of an instrument.
2. Know different measuring device
for a particular application.
3. Understanding the concepts of
limits, fits and tolerance
4. Understand various testing tools
for checking the alignment of machine tools
5 Understand
the various transducers and application of strain gauges
6. Understand
the different devices used to measure force, torque, and pressure
7
Understand the different devices used to measure Speed, Flow, and Temperature
8
Understand the different devices used to measure density, humidity, blood
pressure
COURSE CONTENTS
1.0
Introduction to measurements
1.1 Definition
of measurement
1.2 Significance
of measurement,
1.4 Methods
of measurements
1.5 Generalized
measuring system
1.3 Standards
of measurements.
1.6 Factors in selecting the measuring instruments
1.7 Terms
applicable to measuring instruments: Precision and Accuracy, Sensitivity and Repeatability,
Range, Threshold, Hysteresis, calibration
1.8 Errors
in Measurements: Classification of errors, Systematic and Random error.
2.0 Measuring instruments
2.1 Introduction
2.2 Thread
measurements: Thread gauge micrometer
2.3 Angle measurements: Bevel protractor, Sine
Bar,
2.4 Gauges: plain plug gauge, ring Gauge, snap
gauge, limit gauge
2.5 Comparators: Characterstics of comparators,
Types of comparators
2.6 Surface
finish -Definition, Terminology of surface finish
Talysurf
surface roughness tester
2.7 Co-ordinating
measuring machine
3.1 Limit:
Maxium limit, Minium limit, Basic size, Nominal size
3.2 Fit:
Types of fits-Hole basis and Shaft basis system
3.3 Tolerance: Basic terminology, unilatrel
and bilateral tolerance
3.4 Interchangability and selective assembly
4.0 Machine
tool metrology
4.1 Testing instruments for machine tools
alignment testing
4.2 Checking Parallelism, Straightness,
runout, alignment testing of machine tool as per IS standard procedure.
5.0 Transducers and Strain gauges
5.1 Introduction.
5.2 Transducers:
Characteristics, classification of transducers, two coil self inductance
transducer, Piezoelectric transducer
5.3 Strain Measurements: Strain gauge,
Classification, mounting of strain gauges, Strain gauge rosettes-two and three
elements
6.0 Measurement of force, torque, and
pressure
6.1 Introduction.
6.2 Force
measurements: Spring Balance, Proving
ring, Load cell
6.3 Torque measurement: Prony brake,
Hydraulic dynamometer
6.4 Pressure
measurement: Mcloed gauge,
7.0 Applied
mechanical measurements
7.1 Speed measurement-
Classification of tachometers, Revolution counters Eddy current tachometers
7.2 Displacement measurement- Linear variable Differential
transformers (LVDT),
7.3 Flow measurement-Rotometers,
7.4 Temperature
measurement- Resistance thermometers, Optical Pyrometer.
8.0 Miscellaneous
measurements
8.1 Humidity
measurement –hair hygrometer,
8.2 Density
measurement-hydrometer,
8.3 Liquid
level measurement –-sight glass, Float gauge
8.4 Biomedical
measurement-Sphygmo monometer
SPECIFIC INSTRUCTIONAL OBJECTIVES
1.0
INTRODUCTION TO
MEASUREMENTS
1.1 Define measurement.
1.2 Explain
the significance of measurement.
1.3 Explain
direct and indirect comparison methods of measurement
1.4 Explain
with block diagram generalized measuring system.
1.5 Explain
primary and secondary standards of measurements
1.6 List the factors to be considered while
selecting the instruments.
1.7 Define:
Precision and Accuracy, Sensitivity and Repeatability, Reproducibility, Range,
Threshold, Hysteresis, calibration with respect to measuring instruments
1.8 Classification
of errors in measuring instruments
1.9 Explain systematic and random errors.
2.0 MEASURING INSTRUMENTS
2.1 Explain the measurement of
screw threads elements using Thread gauge micrometer
2.2 Explain the construction and working of
sine bar.
2.3 Explain the construction and working of
bevel protractor
2.4 Sketch and explain: plain plug gauge, ring Gauge, snap gauge, limit gauge,
feeler gauge
2.5 Explain the characteristics of
comparators
2.6 Explain with sketch the working of
mechanical comparator (Reed type)
2.7 Explain with sketch the working of
Electrical comparator
2.8 Explain with sketch the working of
optical comparator
2.9 Explain basic terms of surface finish
2.11 Explain the role of co ordinate measuring
machines (CMM)
3.0 LIMITS, FITS, TOLERANCES
3.1 Outline
the importance of concepts of limits and tolerance
3.2 Explain different types of
fits-Clearance, transistion, interference
3.3 Explain unilateral and bilateral
tolerance
3.4 Explain hole basis and
shaft basis system
3.5 Explain Interchangability and selective
assembly
4.0 MACHINE TOOL METROLOGY
4.1 List the various testing instruments for
machine tools alignment testing
4.2 Explain the checking of parallelism of
spindle axis to carriage movement in lathe
4.3 Explain the checking of straightness of
the carriage movement in lathe
4.4 Explain the checking of run out of axis
of centre in lathe
4.5 Explain the checking for the vertical
straightness of knee of milling machine
5.0 TRANSDUCERS AND STRAIN GAUGES
5.1 Explain
the characteristics of transducers
5.2 State
the requirement of transducers
5.3 Out
line the classification of transducers
5.4 Explain
working of two coil self inductance transducers
5.5
Explain working of Piezo electric transducers
5.6 Explain the principle of strain gauge
5.7 Explain the mounting of strain gauge
5.8 Explain with diagram two element and
three element strain gauge rosettes
5.9 Explain optical strain gauge
6.0 MEASUREMENT OF FORCE, TORQUE, AND PRESSURE
6.1 Outline
the concepts
6.2 Sketch and explain the spring balance
6.3 Sketch
and explain the Proving ring
6.4 Explain
the piezoelectric load cell
6.5
Explain measurement of torque
by proney brake
6.6 Explain
working of hydraulic dynamometer
6.7 Explain working of Mcloed gauge
7.0 APPLIED
MECHANICAL MEASUREMENTS
7.1 Outline
the classification of tachometers
7.2 Sketch and explain revolution counter
7.3 Sketch
and explain Eddy current tachometer
7.4 Explain
the working of LVDT
7.5
Explain the measurement of
flow of liquid using rotameter
7.5 Explain
the principle of working of thermo couple.
7.6 Explain
working of resistance thermometer
7.7 Explain working of optical pyrometer
8.0 MISCELLANEOUS MEASUREMENTS
8.1 Explain
the working of hair hygrometer
8.2 Sketch
and explain hydrometer
8.3 How
the level of liquid can be measured using sight glass
8.4 Explain the principle of float gauge for
liquid level measurement
8.5 How the blood pressure is measured using
sphygmomanometer
REFERENCES
1.
“Mechanical measurements”
by Beckwith Marangoni and Lienhard, Pearson Education, 6th Ed., 2006
2.
“ Metrology & Measurement” by
Anand K Bewoor,Vinay kulakarni ,Tata McGraw hill New delhi 2009
3.
“Principles of Industrial
instrumentation and control systems”by
Channakesava .R.Alavala,DELMAR cenage learning,2009
4.
“Principles of Engineering
metrology” by Rega Rajendra Jaico publishers-2008
5.
“Dimensional Metrology “by Connie Dotson,DELMAR,cenage learning,2007
6.
“Instrumentation measurement
and analysis” by
B.C.Nakara,K.K.chaudarysecond edition,Tata cgraw hill,2005
7.
“Engineering Metrology” by
R.K.Jain, Khanna Publishers, 1994.
8.
Mechanical Measurements by
DOEBLIN
here is the syllabus for another subjects:
here is the syllabus for another subjects:
1 comment:
Still i can see more types of strain gauge
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