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0 0.5 1 1.5 2 2.5 3 3.5 4
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Current (amp)
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ltag
e (
Vo
lt)
Signal Loss with Aluminum (1 cm Apart)
No blockAluminum
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Current (amp)
Vo
ltag
e (
Vo
lt)
Signal Loss with Alloy Steel (1 cm Apart)
No blockAlloy Steel
0.5 1 1.5 2 2.5 3 3.5 42.5
2.51
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Current (amp)
Vo
ltag
e (
Vo
lt)
Signal Loss with Stainless Steel (1 cm Apart)
No blockStainless Steel
0.5 1 1.5 2 2.5 3 3.5 40
0.02
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Current (amp)
Devia
tio
n o
f In
itia
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all S
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ag
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Deviation Comparison (Alloy Steel)
1 cm apart2 cm apart3 cm apart4 cm apart
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Time (Sec)
Volta
ge (V
olt)
Hall Sensor Voltage Vs Thermoelectric Temperature Gradient
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Tem
pera
ture
(C)
TemperatureVoltage
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Time (Sec)
Volta
ge (V
olt)
Pyroelectric Voltage (Temperature Change between 24 to 70 Degree C)
Piezoelectric Effect
Pyroelectric Effect
(B)
Figure 10: Testing results for (A) Thermoelectric/Hall sensor demonstration, (B) Commercial pyroelectric ceramic
(A)
(A) (B)
(C) (D)
Figure 11: Signal loss testing results for (A) Aluminum, (B) Stainless steel, (C) Steel alloy and (D) Deviation comparison
Figure 7: (A) Commercial pyroelectric ceramic (B) After silver paint coating
Investigation on Pyroelectric Ceramic Temperature Sensors for Energy System Applications
Sarker, R.,1 Karim, H.,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 Materials”, Reports on Progress in Physics, 1986, 49(12): P. 1335
LiNbO3 nanopowders
Figure 5: Schematic for compression
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
Student Involvement
References
Methodology & Materials
Testing:
Testing results:
Introduction
Figure 3: (A) Principle of the proposed sensor, (B) Schematic and working mechanism of the sensor components
Figure 8: (A) Square sample (B) Cylindrical sample of LiNbO3
(A) (B)
Figure 9: SEM images for (A) Square sample, (B) Cylindrical sample before curing
(A) (B)
(A) (B)
Figure 6: Hall sensor and signal loss measurement (A) Schematic, (B) Actual setup. Pyroelectric ceramic testing (C) Schematic, (D) Actual setup
(C) (D)
Tests performed: • Hal l e ffect sensor
demonstration • Signal interference
testing • Pyroelectric ceramic
testing
(B)
Hall Sensor
9 V
Voltage regulator
DAQ
(A)
Pyroelectric sensor
Electrodes
Winded coil
Magnetic flux
Acknowledgements This research was performed with the support of the U. S. Department of Energy advanced fossil resource u<liza<on research under the HBCU/MI program with grant number of FE0011235.
2013 - 2014 2014 - 2015 2015 - 2016 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Objective 1 Task 1.1: Materials determination Task 1.2: Sensor Fabrication Task 1.3: Material Evaluation Objective 2 Task 2.1: System Development Task 2.2: Sensor Calibration Task 2.3: Performance Evaluation Objective 3 Task 3.1: Torch Testing Task 3.2: Gas Turbine Testing Task 3.3: Energy System Evaluation
(A) (B)