AT8003 Metrology and Measurements for Automobile Engineers Syllabus:

AT8003 Metrology and Measurements for Automobile Engineers Syllabus – Anna University Regulation 2017

UNIT I Introduction To Measurements And Sensors

Sensors: Functions- Classifications- Main technical requirement and trends Units and standards- Calibration methods- Classification of errors- Error analysis- Limiting error Probable error- Propagation of error- Odds and uncertainty- principle of transduction Classification. Static characteristics- mathematical model of transducers- Zero, First and Second order transducers- Dynamic characteristics of first and second order transducers for
standard test inputs.

UNIT II Variable Resistance, Inductance And Capacitive Sensor

Principle of operation- Construction details- Characteristics and applications of resistive potentiometer- Strain gauges- Resistive thermometers- Thermistors- Piezoresistive sensors Inductive potentiometer- Variable reluctance transducers – EI pick up and LVDT

Special sensors

Variable air gap type, variable area type and variable permittivity type- capacitor microphone Piezoelectric, Magneto strictive, Hall Effect, semiconductor sensor- digital transducers Humidity Sensor. Rain sensor, climatic condition sensor, solar, light sensor, antiglare sensor.

UNIT III Automotive Pressure And Force/Torque Sensor

Pressure Sensor:

Typical automotive applications- Thick film pressure sensor- Semiconductor pressure sensor Integrated silicon intake-manifold pressure sensor-Integrated silicon combustion-pressure sensor- Piezo electric sensor-High pressure sensor with metal diaphragm.

Force/Torque Sensor:

Typical automotive applications- Magneto elastic bearing-pin sensor- Magneto elastic tension/compressive-force sensor – Basic principle of torque measurement – steering- Angle measuring torque sensor

UNIT IV Automotive Position And Rpm/Velocity Sensors

Position Sensors

Typical automotive applications- Wiper potentiometers- Short-circuiting ring sensor- Halfdifferential sensor- Eddy-current pedal-travel sensor- Integrated Hall IC’s – Hall acceleration sensor- Knock sensors-RPM and Velocity Sensors: – Inductive rotational speed sensor- Hall effect sensor

Temperature Sensors

Typical automotive applications -Sintered-Ceramic resistors -Thin film resistors-Thick film resistors- Monocrystalline silicon semiconductor resistor- Thermopile sensors Flow Sensors Ultrasonic flow sensors-Pitot tube air-flow sensor- Hot wire air-mass flow meter- Micro mechanical hot-film air-mass flow meter- Lambda sensor -Imaging Sensor-Rain Sensor Introduction to MEMs

UNIT V Metrology

Basic concept – scientific, industrial and legal metrology – linear and angular measuring instruments, measurement of screw thread – Two, three wire method, measurement with optical flats, laser inter ferometer, coordinate measuring machine.


1. Doeblin E.O, “Measurement Systems: Applications and Design”, 5th Edition, Tat McGrawHill Publishing Co,2007
2. Robert Brandy, “Automotive Electronics and Computer System”, Prentice Hall, 2001
3. William Kimberley,” Bosch Automotive Handbook”, 6th Edition, Robert Bosch GmbH, 2004


1. Bentley J.P, “Principles of Measurement Systems”, 4th Edition, Addision Wesley Longman Ltd., U.K, 2004
2. Jain R. K. “Engineering Metrology” Khanna Publishers, New Delhi, 2012
3. Murthy D.V.S, “Transducers and Instrumentation”, Prentice Hall of India, 2007
4. Neubert H.K.P.,” Instrument Transducers- An Introduction to their Performance and Design”, Oxford University Press, Cambridge, 2003
5. Patranabis. D, “Sensors and Transducers”, 2nd Edition, Prentice Hall India Ltd, 2003