investigation on pyroelectric ceramic temperature sensors...
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Current (amp)
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Signal Loss with Aluminum (1 cm Apart)
No blockAluminum
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Current (amp)
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Signal Loss with Alloy Steel (1 cm Apart)
No blockAlloy Steel
0.5 1 1.5 2 2.5 3 3.5 42.5
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Current (amp)
Vo
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Signal Loss with Stainless Steel (1 cm Apart)
No blockStainless Steel
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Current (amp)
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all S
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Deviation Comparison (Alloy Steel)
1 cm apart2 cm apart3 cm apart4 cm apart
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Time (Sec)
Volta
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Hall Sensor Voltage Vs Thermoelectric Temperature Gradient
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Tem
pera
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TemperatureVoltage
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Time (Sec)
Volta
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olt)
Pyroelectric Voltage (Temperature Change between 24 to 70 Degree C)
Piezoelectric Effect
Pyroelectric Effect
(B)
Figure 8: Testing results for (A) Thermoelectric/Hall sensor demonstration, (B) Commercial pyroelectric ceramic
(A)
(A) (B)
(C)(D)
Figure 9: Signal loss testing results for (A) Aluminum, (B) Stainless steel, (C) Steel alloy and (D) Deviation comparison
Figure 5: (A) Commerc ia l py roelec tric c eramic , (B) After s i lv er pa int c oating
Investigation on Pyroelectric Ceramic Temperature Sensors for Energy System Applications
Sarker, R.,1 Karim, H.,1 Delfin, D.1, Sandoval, S.,1 Love, N.,1 Lin, Y.1,†
1 Department of Mechanical Engineering, The University of Texas at El Paso
Sensor fabrication:
Sensor fabrication:Materials:• Pyroelectric ceramic: Lithium niobate (LiNbO3)• Binder: Polyvinyl alcohol (PVA)Process:• Ceramic compressed at 3 metric tons• Cured at 150°C for 120 minutes
1. Whatmore, R.W., “Pyroelectric Devices and Materia ls”, Reports onProgress in Physics, 1986, 49(12): P. 1335
LiNbO3 nanopowders
Figure 3: Sc hematic for c ompres s ion
Objective:• To design, fabricate, and test wireless temperature sensors
using the principle of pyroelectricity1 • Different geometries were achieved• Cracked surfaces observed on
certain samples• Silver painting of the commercial
sample
• The first stage of the sensor fabrication was carried over successfully
• The Hall effect sensor concept was demonstrated using a thermoelectric sensor
• Voltage change in the Hall effect sensor can be used for temperature sensing
• Signal loss was found when using steel alloys
Figure 1: Motivation behind this project
Rationale:
Results Conclusion
Future Work
Students Involvement
References
Methodology & Materials
Testing:
Testing results:
Introduction
Figure 2: (A) Princ ip le o f the propos ed s ens or, (B) Sc hematic and work ing mec hanis m of the s ens or c omponents
Figure 6: (A) Square s ample and (B) Cy l indric a l s ample of L iNbO3
(A) (B)
Figure 7: SEM images of L iNbO3 nanopowders (A) Before s in tering, (B) After s in tering
(A) (B)
(A) (B)
Figure 4: Hal l s ens or and s ignal los s meas urement (A) Sc hematic , (B) Ac tua l s etup. Py roelec tric c eramic tes ting (C) Sc hematic , (D) Ac tua l s etup
(C) (D)
Tests performed:• Hall effect sensor
demonstration• Signal interference
testing• Pyroelectric ceramic
testing
(B)
Hall Sensor
9 V
Vol tage regulator
DAQ
(A)
Pyroelectric sensor
Electrodes
Winded coil
Magnetic flux
AcknowledgementsThisresearch wasperformedwiththefundingof theU.S.Departmentof Energyadvanced fossilresourceutilizationresearchundertheHBCU/MIprogramwithgrantnumberofDE-FE0011235 .
2012 - 2013 2013 - 2014 2014 - 2015
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Objective 1Task 1.1: Materials determination
Task 1.2: Sensor Fabrication
Task 1.3: Material Evaluation
Objective 2Task 2.1: System Development
Task 2.2: Sensor Calibration
Task 2.3: Performance Evaluation
Objective 3Task 3.1: Torch Testing
Task 3.2: Gas Turbine Testing
Task 3.3: Energy System Evaluation
(A) (B)