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Measurement system ppt
Measurement system ppt
Measurement system ppt
Measurement system ppt
Measurement system ppt
Measurement system ppt
Measurement system ppt
Measurement system ppt
Measurement system ppt
Measurement system ppt
Measurement system ppt
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Measurement system ppt

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Transcript

  • 1. Measurement System Azizco
  • 2.
    • Measurement System
    Sensor Processor or Signal Conditioner Display
    • RTD
    • Potentiometer
    • Strain Gage
    • LVDT
    • Wheatstone Bridge
    • Operational Amplifier
    • Digital
    • Analog
  • 3. RTD Sensor Display Processor or Signal Conditioner
  • 4. Sensor Temperature Change in Resistance R hot = R ref (1 +  (T hot – T cold )) T = 300 ºC R = 580 20 400 .0068 200 716.8 20 300 .0068 200 580.8 20 200 .0068 200 444.8 20 100 ..0068 200 308.8 T ref T hot  Copper R ref R hot
  • 5.
    • Wheatstone Bridge – a circuit that measures Resistance of Change in resistance.
    R2 R1 R4 R3 Vs
  • 6.
    • Wheatstone Bridge – a circuit that measures Resistance of Change in resistance.
    X Y V X-Y = V out = V out RA RB RD RC Vs
  • 7.
    • At T ref = 20 ºC ; R 20 = 200 
    • At T hot = 300ºC ; R 300 = 580.8 
    • RA, RB, RD = 200 
    R hot = R ref (1 +  (T hot – T cold )) V out = 0.653 V R A R B R D R SG Vs
  • 8. Sensor RTD Processor Wheatstone Bridge T = 300 ºC R = 580  V out = 0.658 V To Represent 300 ºC the Display should be somehow significant and related T = 300 ºC 300 Sensor Wheatstone B. Amplifier Display T = 300 ºC R = 580  V out = 0.658 V V= 3.00 300 ºC
  • 9. Sensor Wheatstone B. Amplifier Display T = 300 ºC R = 580  V out = 0.653 V V= 3.00 300 ºC  What is the gain of the Amplifier to give an output of 3.0V from an input of 0.65 Amplifier Gain (A) = Voltage output Voltage input Amplifier Gain (A) = 3.000V 0.653 V A = 4.1 3.00V represent 300ºC
  • 10. Sensor Wheatstone B. Amplifier Display R = 580  V out = 0.653 V V= 3.00 300 ºC 3.00V represent 300ºC T = 300 ºC Processor
  • 11. Thank You For Listening

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