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CONTENTS WHAT IS TRANSDUCER ELECTRICAL TRANSDUCER CLASSIFICATION OF TRANSDUCERS SELECTION CRITERIA OF THE TRANSDUCERS...
WHAT IS TRANSDUCER The transducer is defined as the device which convert the one form of energy into another form of the e...
ELECTRICAL TRANSDUCERS The electrical transducers is one which converts the non- electrical quantity into the equivalent ...
CLASSIFICATION OFTRANSDUCERSOn the basis of transduction form used.As primary and secondary transducers.As passive and ...
On the basis of transduction form usedResistive Transducers.Capacitive Transducers.Inductive Transducers.Voltage and c...
Primary and secondary transducersExampleLVDT and bourdon tube
Passive and Active TransducersIf transducers derive the power require for transduction from an power source, then this ki...
CONT…  When there is no need for any source then these type  of transducers are Active transducersExample are : Thermocou...
THERMOCOUPLE
TYPES OF THERMOCOUPLE
Piezoelectric crystal Quartz ,Rochelle salt, Lithium sulphate or barium titanate.
Inverse Transducers These type of transducers convert a electrical quantity into  non-electrical quantityExample Piezoele...
SELECTION CRITERIA OF THETRANSDUCERSOperating principleSensitivityOperating rangeAccuracyErrorsEnvironmental capabil...
BASIC CONSTRUCTION OFTRANSDUCERSIt consist of two important parts Sensing element. Transduction element.
RESISTANCE TEMPERATUREDETECTOR
THERMISTORS              Thermistors are used for               the measurement of               precision temperature
Cont…
LVDT
Cont…
RVDT
STRAIN GAUGE It works on Piezoresistive effect. These are used for measurement of stress and strain If an elastic mater...
BOURDEN TUBECurved metallic tubes withElliptical cross section Sealed at one end Tends to straighten when pressure app...
BOURDEN TUBE
APPLICATIONAudio/video equipmentPressure indicationMeasurement of displacementAlarms
ADVANTAGESPower requirement is very low for controlling the electrical or electronic system.Output can be indicated and ...
DISADVANTAGESRTD produce mechanical vibrationsTheir cost is highThermistors are unsuitable for wide temperatureRelativ...
CONCLUSIONTransducers are used to convert one form energy to another.All the transducers are very useful in all the appl...
REFERENCEShttp:/123seminarsonly.com/Latest-Seminar- Topics/Latest-Seminar-Topics-021.htmlFrom A.k .Sawhney/3rd sem/chapt...
Transducers
Transducers
Transducers
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Transcript of "Transducers"

  1. 1. CONTENTS WHAT IS TRANSDUCER ELECTRICAL TRANSDUCER CLASSIFICATION OF TRANSDUCERS SELECTION CRITERIA OF THE TRANSDUCERS BASIC CONSTRUCTION OF TRANSDUCERS RESISTANCE TEMPERATURE DETECTOR THERMISTORS LVDT RVDT STRAIN GUAGE BOURDON TUBE APPLICATIONS,ADVATAGES AND DISADVANTAGES
  2. 2. WHAT IS TRANSDUCER The transducer is defined as the device which convert the one form of energy into another form of the energyExample: Temperature transducers Thermocouples Resistance-Temperature Detectors (RTD) Thermistors Resistive position transducers Displacement transducers Strain gauge
  3. 3. ELECTRICAL TRANSDUCERS The electrical transducers is one which converts the non- electrical quantity into the equivalent electrical quantity. Non-electrical quantity such as force, displacement, stress, temperature. Electrical quantity such as current , voltage
  4. 4. CLASSIFICATION OFTRANSDUCERSOn the basis of transduction form used.As primary and secondary transducers.As passive and active transducers.As analog and digital transducers.As transducers and inverse transducers
  5. 5. On the basis of transduction form usedResistive Transducers.Capacitive Transducers.Inductive Transducers.Voltage and current Generating Transducers.
  6. 6. Primary and secondary transducersExampleLVDT and bourdon tube
  7. 7. Passive and Active TransducersIf transducers derive the power require for transduction from an power source, then this kind of transducer are known as passive transducerExampleLVDTRVDT
  8. 8. CONT… When there is no need for any source then these type of transducers are Active transducersExample are : Thermocouple Piezoelectric crystal
  9. 9. THERMOCOUPLE
  10. 10. TYPES OF THERMOCOUPLE
  11. 11. Piezoelectric crystal Quartz ,Rochelle salt, Lithium sulphate or barium titanate.
  12. 12. Inverse Transducers These type of transducers convert a electrical quantity into non-electrical quantityExample Piezoelectric crystal Analog ammeter voltmeter
  13. 13. SELECTION CRITERIA OF THETRANSDUCERSOperating principleSensitivityOperating rangeAccuracyErrorsEnvironmental capabilityInsensitive to unwanted SignalStability
  14. 14. BASIC CONSTRUCTION OFTRANSDUCERSIt consist of two important parts Sensing element. Transduction element.
  15. 15. RESISTANCE TEMPERATUREDETECTOR
  16. 16. THERMISTORS Thermistors are used for the measurement of precision temperature
  17. 17. Cont…
  18. 18. LVDT
  19. 19. Cont…
  20. 20. RVDT
  21. 21. STRAIN GAUGE It works on Piezoresistive effect. These are used for measurement of stress and strain If an elastic material is subjected to tension then its resistance changes.
  22. 22. BOURDEN TUBECurved metallic tubes withElliptical cross section Sealed at one end Tends to straighten when pressure applied. Angular sensitivity proportional to pressure applied
  23. 23. BOURDEN TUBE
  24. 24. APPLICATIONAudio/video equipmentPressure indicationMeasurement of displacementAlarms
  25. 25. ADVANTAGESPower requirement is very low for controlling the electrical or electronic system.Output can be indicated and recorded remotely from the sensing element.Electrical amplification and attenuation can be easily done.An amplifier may be used to amplify the electrical signal according to requirement.
  26. 26. DISADVANTAGESRTD produce mechanical vibrationsTheir cost is highThermistors are unsuitable for wide temperatureRelative large displacement is required for appreciable output for LVDTBourdon tubes do not provide the precise measurement.
  27. 27. CONCLUSIONTransducers are used to convert one form energy to another.All the transducers are very useful in all the application such as microphone , speaker etc.
  28. 28. REFERENCEShttp:/123seminarsonly.com/Latest-Seminar- Topics/Latest-Seminar-Topics-021.htmlFrom A.k .Sawhney/3rd sem/chapter5/Pageno.5.1- 5.187http://en.wikipedia.org/wiki/Transducer
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