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Wireless Temperature Sensor. Detail Design Review. Bill of materials Electrical Schematic Programming Circuit Schematic PCB Board Test Stand Test Drawing Theoretical Results Fabrication Timeline. Outline. Bill of Materials. Circuit Schematic. Programming. - PowerPoint PPT Presentation
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Wireless Temperature Sensor
Detail Design Review
Outline
• Bill of materials• Electrical Schematic• Programming• Circuit Schematic• PCB Board• Test Stand• Test Drawing• Theoretical Results• Fabrication Timeline
Bill of MaterialsPart Quantity Vender Total Price
22K Resistor 10 Digi-Key $ 0.38
4.7K Resistor 10 Digi-Key $ 0.38
Terminal Block 3 Digi-Key $ 10.50
10 K Resistor 10 Digi-Key $ 0.38
Header 9 Digi-Key $ 18.09
0.1uF Capacitor 30 Digi-Key $ 1.14
Battery Holder 3 Digi-Key $ 4.65
Lithium Battery 15 Mouser $ 41.55
PCB Board 4 Express PCB $ 75.00
Zigbee Kit 1 Max Stream $ 275.00
CJC Chips 12 Newark $ 153.84
RTV 1 $ 79.99
RTV Primer 1 $ 39.99
Thermocouple Wire 25 ft Omega $ 31.12
Circuit Schematic
Programming
• Shift in SPI data to internal pic memory
• Assign Data a CJC ID
• Divide temperature data by 4 to change to correct 0 to 1024 C resolution
• Output Temperature, CJC ID, and open circuit data using asynchronous serial.
PCB Layout
PCB Completed
Test Stand
Solidworks Model Final Model
Base
Holding PlateFor 4” x 4.5” Brick
Holding PlateFor 2” x 2” Brick
Locking Ring
Test DrawingCircuit
Spacers
Bracket
TPS
1-D Heat AnalysisHeat Shield Temperature Over Time
0
100
200
300
400
500
600
700
800
60 90 120 150 180 210 240 270 300 330
Time (sec)
Te
mp
era
ture
(C
)
.25 in.
.75 in.
1.25 in.
1.75 in.
Temperature Through Heat Shield After 3 min.
0
200
400
600
800
1000
1200
Depth Into Heat Slield (in)
Tem
pera
ture
(C
)
1. Semi-Infinite Solid2. Temperature of heated surface of brick is uniform at
1000 C3. One-dimensional conduction through brick4. Properties of FRCI-12 Rigid Tile are uniform at all
temperatures5. Initial Block Temperature is 20 Degrees C
Assumptions
FEA AnalysisTemperature Profile After 3 min. of Constant Surface Temperature
Fabrication Timeline
Questions
Production BudgetPart Quantity Price Per Unit Total Unit Price
22K Resistor 1 $0.04 $0.04
4.7K Resistor 1 $0.04 $0.04
Terminal Block 1 $3.50 $3.50
10 K Resistor 1 $0.04 $0.04
Header 3 $2.01 $6.03
.1uF Capacitor 10 $0.04 $0.38
Battery Holder 1 $1.55 $1.55
Lithium Battery 1 $2.77 $2.77
PCB Board 1 $18.75 $18.75
Zigbee 1 $23.20 $23.20
CJC Chips 4 $12.82 $51.28
Thermocouple Wire 1 $2.48 $2.48
Total $110.05
*High prices due to not ordering in mass quantities.
