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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