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References
Seminar Automotive Sensors
Chair for Measurement and Sensor Technology
Univ.-Prof. Dr.-Ing. O. Kanoun
[1] The Michigan Chemical Process Dynamics and Controls open text book
https://controls.engin.umich.edu (20, April 2015)
[2] DeVale INDUSTRIES Inc. - http://www.devale.com (20, April 2015)
[3] AZO SENSORS - http://www.azosensors.com (25, April 2015)
[4] WATLOW, Sensor selection guide - http://watlow.com (25, April 2015)
[5] Engine coolant temperature sensor, Wikipedia - http://en.wikipedia.org
(25, April 2015)
[6] CVEL AUTOMOTIVE ELECTRONICS, The Clemson university vehicular
electronics laboratory- http://www.cvel.clemson.edu (10, May 2015 )
[7] FreeASEStudyGuides.com - http://www.freeasestudyguides.com (10, May
2015)
[8] Online Electrical Engineering, electrical4u.com - http://www.electrical4u.com
(10, May 2015)](https://image.slidesharecdn.com/temperaturesensorsfinal-150605193106-lva1-app6891/75/Automotive-Temperature-sensors-14-2048.jpg)
![15
References (Figure sources)
Seminar Automotive Sensors
Chair for Measurement and Sensor Technology
Univ.-Prof. Dr.-Ing. O. Kanoun
[Fig.1] Thermocouple structure: maxim integrated, http://www.maximintegrated.com
[Fig.2] Typical thermocouple sensors: Engine thermocouples,
http://www.fwmurphy.co.uk
[Fig.3] and [Fig.4] exsense electronics, http://www.exsense.cn
[Fig.5] and [Fig.6] EAGER learning,
http://eagerlearning.org/practice/sensors/temperature-sensor/
[Fig.7] Filled system thermometer – Liquid filled temperature sensors, FTB
instruments
[Fig.8] bimetallic thermometer, Physics world - http://www.hk-phy.org
[Fig.9] and [Fig.10] measurement specialties, http://www.meas-spec.com
[Fig.11] and [Fig.12] – AutoZone, http://www.autozone.com
[Fig.13] Working – AZO sensors, http://www.azosensors.com](https://image.slidesharecdn.com/temperaturesensorsfinal-150605193106-lva1-app6891/75/Automotive-Temperature-sensors-15-2048.jpg)
Uploaded byHardik Rathod
Automotive Temperature sensors
This document summarizes temperature sensors used in automotive applications. It describes two main types of temperature sensors: contact sensors which require direct physical contact like thermocouples, RTDs, and thermistors, and non-contact infrared sensors. It provides details on the structure, working principles, and common applications of these sensors for measuring coolant, air, oil, exhaust, and other temperatures. The document was presented by Hardik Rathod at Chemnitz University of Technology on automotive sensors.
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Automotive Temperature sensors
- 1. Hardik Rathod Chemnitz Universityof Technology Course of Studies M_Es SS2015 Semester Temperature Sensors Seminar Automotive Sensors Chair for Measurement and Sensor Technology Univ.-Prof. Dr.-Ing. O. Kanoun
- 2. 2 Contents • Introduction • Typesand short discription • Structure • Working principle • Application in Automotive Domain • References Seminar Automotive Sensors Chair for Measurement and Sensor Technology Univ.-Prof. Dr.-Ing. O. Kanoun
- 3. 3 Introduction • Physical, electronic,chemical, mechanical and biological systems are affected by temperature • Temperature is most often measured quantity • Most commonly used in Food processing, environmental control, medical devices, chemical handling and in Automotive • Used to ensure that a process is either staying with certain range Seminar Automotive Sensors Chair for Measurement and Sensor Technology Univ.-Prof. Dr.-Ing. O. Kanoun
- 4. 4 Types • Two types:1. Contact 2. Non-contact • Contact Temperature Sensors: o Thermocouples o Resistance Temperature Detectors (RTD) o Thermistors o Filled system thermometers o Bimetallic thermometers • Non-Contact Temperature Sensors: o Pyrometer or o Infrared Temperature sensors Seminar Automotive Sensors Chair for Measurement and Sensor Technology Univ.-Prof. Dr.-Ing. O. Kanoun
- 5. 5 Contact Temperature Sensors SeminarAutomotive Sensors Chair for Measurement and Sensor Technology Univ.-Prof. Dr.-Ing. O. Kanoun Thermocouples •Pair of junction formed from two different metals •One junction represents reference temperature, other is the temperature to be measured •Temperature difference cause a voltage that is temperature dependent •Commonly used sensor (inexpensive, reliable, do not require power) •Wide temperature range Fig.1 Thermocouple structure Fig.2 Typical thermocouple sensors
- 6. 6 Contact Temperature Sensors SeminarAutomotive Sensors Chair for Measurement and Sensor Technology Univ.-Prof. Dr.-Ing. O. Kanoun Fig.3 structure of RTDs Fig.4 R vs T
- 7. 7 Contact Temperature Sensors SeminarAutomotive Sensors Chair for Measurement and Sensor Technology Univ.-Prof. Dr.-Ing. O. Kanoun Fig.5 thermistor characteristic Fig.6 thermistor
- 8. 8 Contact Temperature Sensors SeminarAutomotive Sensors Chair for Measurement and Sensor Technology Univ.-Prof. Dr.-Ing. O. Kanoun Filled system thermometer •Liquid enclosed in a tube •Volume of liquid changes as function of temperature •Liquids used- Mercury, alcohol Bimetallic thermometer •Two metals with different thermal expansion coefficients are fixed together •Change in temperature causes expansion in metal •Steel and copper are used for this Fig.7 Filled system thermometers Fig.8 Bimetallic thermometer
- 9. 9 Non-contact Temperature Sensors SeminarAutomotive Sensors Chair for Measurement and Sensor Technology Univ.-Prof. Dr.-Ing. O. Kanoun Infrared temperature sensor •Measures heat radiated by object •Thermal energy focused on thermopile using lens •Output of thermopile is given to the electronic package for amplification and further process •Relatively faster •Used when direct contact is undesirable Fig.9 IR temperature sensor Fig.10 IR gun
- 10. 10 Structure Seminar Automotive Sensors Chairfor Measurement and Sensor Technology Univ.-Prof. Dr.-Ing. O. Kanoun Structure •Sensing element surrounded by metal body •Typically 2 pin device Manufacturers •Bosch, Continental, Delphi, Denso, TI, Beru, C-Temp, etc. Fig.11 structure Fig.12 typical automotive temperature sensors
- 11. 11 Working principle Seminar AutomotiveSensors Chair for Measurement and Sensor Technology Univ.-Prof. Dr.-Ing. O. Kanoun • Constant voltage is supplied to sensor • Resistance changes with respect to temperature • Voltage sensing circuit determines resulting voltage drop across thermistor • Resulting signal given is to the control unit • Control unit takes decisions according to results Fig. 13 Working
- 12. 12 Application in Automotivedomain Seminar Automotive Sensors Chair for Measurement and Sensor Technology Univ.-Prof. Dr.-Ing. O. Kanoun Coolant temperature Sensor •Used to adjust fuel injection, ignition timing and cooling fan Air temperature Sensor •Installed in the intake air manifold •Measures temperature of engine intake air •Range -40 ˚C to +120 ˚C Engine Oil temperature Sensor •Calculates engine oil temperature (-40 ˚C to +170 ˚C) Exhaust Gas temperature Sensor •Employs platinum measuring resistor (-40 ˚C to +1000 ˚C) •Used to regulate exhaust gas recirculation •Mounted in exhaust system
- 13. 13 Seminar Automotive Sensors Chairfor Measurement and Sensor Technology Univ.-Prof. Dr.-Ing. O. Kanoun Fuel temperature Sensor •Located along fuel delivery system •Provides fuel temperature (-40 ˚C to +160 ˚C) Vehicle’s in-out temperature Sensor •Exterior temperature sensor: located around front bumper area •Cabin temperature sensor: near or within steering column Gives signal to HVAC (heating, ventilation and air conditioning) system Tire and Brake disc temperature Sensor •Located around tire envelope •IR temperature sensors employed Application in Automotive domain
- 14. 14 References Seminar Automotive Sensors Chairfor Measurement and Sensor Technology Univ.-Prof. Dr.-Ing. O. Kanoun [1] The Michigan Chemical Process Dynamics and Controls open text book https://controls.engin.umich.edu (20, April 2015) [2] DeVale INDUSTRIES Inc. - http://www.devale.com (20, April 2015) [3] AZO SENSORS - http://www.azosensors.com (25, April 2015) [4] WATLOW, Sensor selection guide - http://watlow.com (25, April 2015) [5] Engine coolant temperature sensor, Wikipedia - http://en.wikipedia.org (25, April 2015) [6] CVEL AUTOMOTIVE ELECTRONICS, The Clemson university vehicular electronics laboratory- http://www.cvel.clemson.edu (10, May 2015 ) [7] FreeASEStudyGuides.com - http://www.freeasestudyguides.com (10, May 2015) [8] Online Electrical Engineering, electrical4u.com - http://www.electrical4u.com (10, May 2015)
- 15. 15 References (Figure sources) SeminarAutomotive Sensors Chair for Measurement and Sensor Technology Univ.-Prof. Dr.-Ing. O. Kanoun [Fig.1] Thermocouple structure: maxim integrated, http://www.maximintegrated.com [Fig.2] Typical thermocouple sensors: Engine thermocouples, http://www.fwmurphy.co.uk [Fig.3] and [Fig.4] exsense electronics, http://www.exsense.cn [Fig.5] and [Fig.6] EAGER learning, http://eagerlearning.org/practice/sensors/temperature-sensor/ [Fig.7] Filled system thermometer – Liquid filled temperature sensors, FTB instruments [Fig.8] bimetallic thermometer, Physics world - http://www.hk-phy.org [Fig.9] and [Fig.10] measurement specialties, http://www.meas-spec.com [Fig.11] and [Fig.12] – AutoZone, http://www.autozone.com [Fig.13] Working – AZO sensors, http://www.azosensors.com