MU- 307 MEASUREMENTS & METROLOGYB. Tech. V SemesterNo. of Credits: 4Sessional: 40 Marks

L T P TotalTheory : 60 Marks

4 0 0 4Total : 100 Marks

Duration of Exam: 3 Hours

UNIT 1. Introduction:Introduction to measurement and measuring instruments, Generalized measuring system and functional elements, units of measurement, static and dynamic performance characteristics of measurement devices, calibration, concept of error, sources of error, statistical analysis of errors.

UNIT 2. Sensors and Transducers:Types of sensors, types of transducers and their characteristics. Measurement of displacement and angular velocity. Measurement of pressure: Gravitational, direct acting, elastic and indirect type pressure transducers. Measurement of very low pressures.

UNIT 3. Strain Measurement:Types of strain gauges and their working, strain gauge circuits, temperature compensation. Strain rosettes, Measurements of force and torque. Temperature measurement by thermometers, bimetallic, thermocouples, thermistors and pyrometers.

UNIT 4. Measurement of Flow:Obstruction meters, variable head meters, hot wire and magnetic meters, ultrasonic flow meters etc. Vibration and noise measurement: Seismic instruments, vibration pick ups and decibel meters. Data acquisition system: Introduction to data acquisition systems, single and multi channel systems, microprocessors and PC based data acquisition systems. Input-output devices, Signal transmission and processing: Devices and systems.

UNIT 5. Metrology:Standards of linear measurement, line and end standards. System of limits and fits. Linear and angular measurements devices and systems. Limit gauges and their design. Measurement of geometric forms like straightness, flatness, roundness and circularity. Optical projectors, tool makers microscope, autocollimators. Interferometry: principle and uses of interferometry, optical flat and interferometers, laser interferometers. Comparators: types, working principles and magnification range. Measurement of screw threads and gears. Surface texture: quantitative evaluation of surface roughness and its measurement. Introduction to CMM. In-process gauging systems. Inspection: In-process and final inspection. Sampling and 100% inspection. Sampling plans.

Text Books

1. Beckwith Thomas G., "Mechanical Measurements", Narosa Publishing House, N. Delhi2. Doeblein, E. O., "Measurement Systems, Application Design" , McGraw Hill, 19903. Kumar, D. S., Mechanical Measurements and Control", Metropolitan, N. Delhi.4. Humc, K.,"Engineering Metrology", MacDonald and Co. 1963.5. Gupta, I.E., Engineering Metrology", Dhanpat Rai & Sons, New. Delhi,1994