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P14452:SYSTEMS DESIGN REVIEWTake Two
OVERVIEW
• Updates• Engineering Specifications• Morph Chart
• Concepts• Development• Presentation• Selections
• Action Items
NEW SPECIFICATIONS
Number Source Name Measure Units Minimum Ideal Maximum
ES7.1 CR2 Start Capture Present Binary FALSE TRUE TRUE
ES7.2 CR2 Stop Capture Present Binary FALSE TRUE TRUE
ES12.1 CR3 Voltage Accuracy ADC Accuracy mV / LSB 5 10 10
ES16 CR2Sensor Voltage
RangePeak to Peak Volts -10V - 10V
UPDATED MORPH CHARTProblems 1 2 3 4 5 6
Power Source Li-ION LiPo NiMH UltraCapacitor Coin Cell
Start Capture Power On Timer Reed Switch Wireless Sensor Trigger
Stop Capture PowerOff Timer Reed Switch Wireless Sensor Trigger
Sensor Connection Permanent BNC S-Video/PS/2 Ethernet (RJ-45) Phone (RJ-11) 4-Wire Audio
Set Sampling Rate Software Switches Digital Knob
Mount Device Drill Holes Magnet Velcro Glue
High Pressure Diamond Metal Plastic Composites
High Temp Insulated Active Cooling Passive Cooling
Oily Env. Molded Case Gaskets Leak-Proof Connectors
Data Storage NAND Flash SD microSD CF Card
Processor μC DSP FPGA PSoC
Data Access Screws USB
CONCEPT DEVELOPMENTRevisited
FUNCTIONAL DECOMPOSITION
HARDWARE TREE
POWER SOURCES
Criteria Li-Ion LiPo NiMH Ultra Capacitor Coin Cell
Size 3 2 3 1 1 1 = Smallest
Capacity 3 2 2 2 1 1 = Lowest
Voltage 3.7V 3.7V-3.8V 1.25V Variable 3.0V
Heat 2 3 2 1 1 1 = Coolest
Reusability 500-800 1000 500-1000 >1000 1 # Cycles
Charge Time 2 1 3 2 N/A 1 = Shortest
Weight 3 2 3 1 1 1 = Lightest
Cost $7 $8 $2 $10 $2
START/STOP CAPTURE
Criteria Power On Timer Reed Switch Wireless Sensor Trigger
Simplicity 3 2 3 1 1 1 = Least Simple
Cost Free Free/Cheap Cheap $40-$100 Free
Size None None/1 1 2 None 1 = Smaller
Memory Req. 3 2 1 1 1 1 = Least Mem Req
Ease of Use 3 2 3 2 1 1 = Easiest
SENSOR CONNECTORS
Criteria Permanent BNC S-Video/PS/2 Ethernet Phone 4-Wire Audio
Simplicity 3 3 2 2 2 2 1 = Least Simple
Cost Free $5 $2 $1 $1 $1
Size None 3 2 3 2 1 1 = Smallest
Conductors Variable 2 4/6 8 4 4 # Conductors
Commonality N/A 3 1 1 1 2 1 = Least Common
SAMPLING RATE SELECTION
Criteria Software Switches Digital Knob
Simplicity 3 2 2 1 = Least Simple
Cost Free Cheap Cheap
Size None 2 1 1 = Smaller
# of Options Inf 4-8 4-8 # of Options
Ease of Use 2 1 2 1 = Easiest
DEVICE MOUNTING
Criteria Drill Holes Magnet Velcro Glue
Simplicity 1 3 2 3 1 = Least Simple
Cost 3 1 1 1 1 = Cheapest
Size 3 2 1 1 1 = Smallest
Secure 3 2 2 1 1 = Least Secure
Ease of Removal 2 3 3 1 1 = Least Easy
HIGH PRESSURE SOLUTIONS
Criteria Diamond Metal Plastic Composites
Cost 3 1 2 2 1 = Cheapest
Strength 3 2 1 3 1 = Weakest
Durbaility 3 2 2 2 1 = Least Durable
Weight 2 3 1 1 1 = Lightest
Machinability 3 1 1 2 1 = Easiest
HIGH TEMP SOLUTIONS
Criteria Insulate Active Cooling Passive Cooling
Cost 2 3 1 1 = Cheapest
Thermal Protection 2 3 2 1 = Least Protective
Durbaility 2 1 3 1 = Least Durable
Weight 1 3 2 1 = Lightest
Size 2 3 2 1 = Smallest
OILY ENVIRONMENT SOLUTIONS
Criteria Molded Gaskets Leak-Proof Conn.
Cost 1 2 3 1 = Cheapest
Thermal Protection 3 2 3 1 = Least Protective
Durbaility 3 1 2 1 = Least Durable
Weight 2 1 1 1 = Lightest
DATA STORAGE
Criteria NAND Flash SD microSD CF Card
Cost 3 1 2 2 1 = Cheapest
Capacity 1 3 2 1 1 = Lowest Capacity
Size 2 2 1 3 1 = Smallest
Complexity 3 2 1 3 1 = Least Complex
Durability 3 2 2 1 1 = Least Durable
PROCESSING AND CONTROL
Criteria μC DSP FPGA PSoC
Cost 1 2 3 2 1 = Cheapest
Speed 2 3 2 3 1 = Slowest
Size 1 2 3 2 1 = Smallest
Power 1 2 3 2 1 = Least Power
I/O Capacity 3 2 3 2 1 = Least Capacity
Simplicity 3 2 1 1 1 = Least Simple
CONCEPTSReinvented
CONCEPT 1
Concept # 1
Power Source Coin Cell
Start CaptureReed Switch
Stop Capture
Sensor Connection 4-Wire
Set Sampling Rate Switches
Mount Device Drill Holes
High Pressure Plastic
High Temp Insulated
Oily Env. Mold
Data Storage microSD
Processor μC
Data Access Screws
Sample Bit Width 12-bit
Sample Rate 5kHz
CONCEPT 2
Concept # 2
Power Source UltraCap
Start Capture Power On
Stop Capture Timer
Sensor Connection BNC
Set Sampling Rate Software
Mount Device Velcro
High Pressure Metal
High Temp Passive
Oily Env. Gasket
Data Storage SD
Processor DSP
Data Access USB
Sample Bit Width 16-bit
Sample Rate 20kHz
CONCEPT 3
Concept # 3
Power Source LiPo
Start CaptureTimer
Stop Capture
Sensor Connection Ethernet
Set Sampling Rate Knob
Mount Device Magnet
High Pressure Plastic
High Temp Active
Oily Env. Sealed Connectors
Data Storage SD
Processor PSoC
Data Access Screws
Sample Bit Width 12-bit
Sample Rate 200kHz
CONCEPT 4
Concept # 4
Power Source UltraCap
Start Capture Reed Switch
Stop Capture Timer
Sensor Connection 4-Wire
Set Sampling Rate Digital Knob
Mount Device Magnet
High Pressure Composite
High Temp Insulated/Passive
Oily Env. Gaskets/Plugs
Data Storage microSD
Processor μC
Data Access USB
Sample Bit Width 16-bit
Sample Rate 10kHz
CONCEPT SELECTIONRevamped
DATUM: MSR145
DATUM MSR145Power Source LiPo
Start CaptureStop Capture
Manual/Sensor Trigger/Timer
Sensor Connection Internal/BNC
Set Sampling Rate Software
Mount Device Drill Holes
High Pressure Plastic
High Temp None
Oily Env. Optional Waterproof
Data Storage microSD
Processor μC
Data Access USB
Sample Bit Width 12-bit
Sample Rate 50Hz
PUGH
Criteria 1 2 3 4 MSR145
Cost + s s +
DATUM
Size + + s +
Easy Data Access - s - s
Lead time + s - s
Accuracy + + + +
Easy to Setup s + + +
Durability s + s +
Robustness + s s +
Simple Design s s - -
+/- 5/1 4/0 2/3 6/1
CHOSEN CONCEPT
Concept # 4
Power Source UltraCap
Start Capture Reed Switch
Stop Capture Timer
Sensor Connection 4-Wire
Set Sampling Rate Digital Knob
Mount Device Magnet
High Pressure Composite
High Temp Insulated/Passive
Oily Env. Gaskets/Plugs
Data Storage microSD
Processor μC
Data Access USB
Sample Bit Width 16-bit
Sample Rate 10kHz
ACTION ITEMSMoving Forward
COMPONENT SELECTION
• Need to Choose• Microcontroller• microSD card• Ultracapacitor• Attenuator Op-amp• Power Regulator• Cable Connectors• Component Parts
• Resistors• Capacitors
PROTOTYPING
• Develop a Breadboard Design• Existing Materials
• Processor Development Board• Signal Generator
• Systems to Refine• Input Attenuation• Power Regulation
• Software• User Configuration• Sampling Routine• Filter Routine• Storage Routine
MATERIALS TESTING
• Evaluate Materials• Metals
• Aluminum and Steel• Plastics
• Polysulfone• PVDF• PFA• Teflon PTFE
• Composites• Fiberglass and Carbon Fiber
• Target Measurements• Axial Strength (Pressure)• Elasticity (Pressure)• Thermal Conductivity (Temp)• Porosity (Oil)
SCHEMATIC CAPTURE
• Circuit Schematics• Microprocessor I/O• Power Regulation• Input Attenuator
• Simulations• Input Attenuator
• Frequency Response• Attenuation Performance
• Power Regulator• Noise Performance
• Initial PCB Layout
QUESTIONS?fin.